Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

15 files changed, 8909 insertions, 0 deletions

diff --git a/security/nss/lib/pkcs7/Makefile b/security/nss/lib/pkcs7/Makefile
new file mode 100644
index 0000000000..aae54b1e0f
--- /dev/null
+++ b/security/nss/lib/pkcs7/Makefile
@@ -0,0 +1,46 @@
+#! gmake
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#######################################################################
+# (1) Include initial platform-independent assignments (MANDATORY).   #
+#######################################################################
+
+include manifest.mn
+
+#######################################################################
+# (2) Include "global" configuration information. (OPTIONAL)          #
+#######################################################################
+
+include $(CORE_DEPTH)/coreconf/config.mk
+
+#######################################################################
+# (3) Include "component" configuration information. (OPTIONAL)       #
+#######################################################################
+
+
+
+#######################################################################
+# (4) Include "local" platform-dependent assignments (OPTIONAL).      #
+#######################################################################
+
+#######################################################################
+# (5) Execute "global" rules. (OPTIONAL)                              #
+#######################################################################
+
+include $(CORE_DEPTH)/coreconf/rules.mk
+
+#######################################################################
+# (6) Execute "component" rules. (OPTIONAL)                           #
+#######################################################################
+
+
+
+#######################################################################
+# (7) Execute "local" rules. (OPTIONAL).                              #
+#######################################################################
+
+
+
diff --git a/security/nss/lib/pkcs7/certread.c b/security/nss/lib/pkcs7/certread.c
new file mode 100644
index 0000000000..15094f2d78
--- /dev/null
+++ b/security/nss/lib/pkcs7/certread.c
@@ -0,0 +1,535 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "cert.h"
+#include "base64.h"
+#include "secitem.h"
+#include "secder.h"
+#include "secasn1.h"
+#include "secoid.h"
+#include "secerr.h"
+
+SEC_ASN1_MKSUB(SEC_AnyTemplate)
+SEC_ASN1_MKSUB(SEC_SetOfAnyTemplate)
+
+typedef struct ContentInfoStr ContentInfo;
+typedef struct DegenerateSignedDataStr DegenerateSignedData;
+
+struct ContentInfoStr {
+    SECOidTag contentTypeTag; /* local; not part of encoding */
+    SECItem contentType;
+    union {
+        SECItem *data;
+        DegenerateSignedData *signedData;
+    } content;
+};
+
+struct DegenerateSignedDataStr {
+    SECItem version;
+    SECItem **digestAlgorithms;
+    ContentInfo contentInfo;
+    SECItem **certificates;
+    SECItem **crls;
+    SECItem **signerInfos;
+};
+
+static const SEC_ASN1Template *
+choose_content_template(void *src_or_dest, PRBool encoding);
+
+static const SEC_ASN1TemplateChooserPtr template_chooser = choose_content_template;
+
+static const SEC_ASN1Template ContentInfoTemplate[] = {
+    { SEC_ASN1_SEQUENCE,
+      0, NULL, sizeof(ContentInfo) },
+    { SEC_ASN1_OBJECT_ID,
+      offsetof(ContentInfo, contentType) },
+    { SEC_ASN1_OPTIONAL | SEC_ASN1_DYNAMIC |
+          SEC_ASN1_EXPLICIT | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 0,
+      offsetof(ContentInfo, content),
+      &template_chooser },
+    { 0 }
+};
+
+static const SEC_ASN1Template DegenerateSignedDataTemplate[] = {
+    { SEC_ASN1_SEQUENCE,
+      0, NULL, sizeof(DegenerateSignedData) },
+    { SEC_ASN1_INTEGER,
+      offsetof(DegenerateSignedData, version) },
+    { SEC_ASN1_SET_OF | SEC_ASN1_XTRN,
+      offsetof(DegenerateSignedData, digestAlgorithms),
+      SEC_ASN1_SUB(SEC_AnyTemplate) },
+    { SEC_ASN1_INLINE,
+      offsetof(DegenerateSignedData, contentInfo),
+      ContentInfoTemplate },
+    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC |
+          SEC_ASN1_XTRN | 0,
+      offsetof(DegenerateSignedData, certificates),
+      SEC_ASN1_SUB(SEC_SetOfAnyTemplate) },
+    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC |
+          SEC_ASN1_XTRN | 1,
+      offsetof(DegenerateSignedData, crls),
+      SEC_ASN1_SUB(SEC_SetOfAnyTemplate) },
+    { SEC_ASN1_SET_OF | SEC_ASN1_XTRN,
+      offsetof(DegenerateSignedData, signerInfos),
+      SEC_ASN1_SUB(SEC_AnyTemplate) },
+    { 0 }
+};
+
+static const SEC_ASN1Template PointerToDegenerateSignedDataTemplate[] = {
+    { SEC_ASN1_POINTER, 0, DegenerateSignedDataTemplate }
+};
+
+static SECOidTag
+GetContentTypeTag(ContentInfo *cinfo)
+{
+    if (cinfo->contentTypeTag == SEC_OID_UNKNOWN)
+        cinfo->contentTypeTag = SECOID_FindOIDTag(&cinfo->contentType);
+    return cinfo->contentTypeTag;
+}
+
+static const SEC_ASN1Template *
+choose_content_template(void *src_or_dest, PRBool encoding)
+{
+    const SEC_ASN1Template *theTemplate;
+    ContentInfo *cinfo;
+    SECOidTag kind;
+
+    PORT_Assert(src_or_dest != NULL);
+    if (src_or_dest == NULL)
+        return NULL;
+
+    cinfo = (ContentInfo *)src_or_dest;
+    kind = GetContentTypeTag(cinfo);
+    switch (kind) {
+        default:
+            theTemplate = SEC_ASN1_GET(SEC_PointerToAnyTemplate);
+            break;
+        case SEC_OID_PKCS7_DATA:
+            theTemplate = SEC_ASN1_GET(SEC_PointerToOctetStringTemplate);
+            break;
+        case SEC_OID_PKCS7_SIGNED_DATA:
+            theTemplate = PointerToDegenerateSignedDataTemplate;
+            break;
+    }
+    return theTemplate;
+}
+
+static SECStatus
+SEC_ReadPKCS7Certs(SECItem *pkcs7Item, CERTImportCertificateFunc f, void *arg)
+{
+    ContentInfo contentInfo;
+    SECStatus rv = SECFailure;
+    SECItem **certs;
+    int count;
+    PLArenaPool *arena;
+
+    arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
+    if (arena == NULL) {
+        return rv;
+    }
+
+    PORT_Memset(&contentInfo, 0, sizeof(contentInfo));
+    if (SEC_ASN1DecodeItem(arena, &contentInfo, ContentInfoTemplate,
+                           pkcs7Item) != SECSuccess) {
+        goto done;
+    }
+
+    if (GetContentTypeTag(&contentInfo) != SEC_OID_PKCS7_SIGNED_DATA) {
+        goto done;
+    }
+
+    if (contentInfo.content.signedData == NULL) {
+        PORT_SetError(SEC_ERROR_BAD_DER);
+        goto done;
+    }
+
+    rv = SECSuccess;
+
+    certs = contentInfo.content.signedData->certificates;
+    if (certs) {
+        count = 0;
+
+        while (*certs) {
+            count++;
+            certs++;
+        }
+        rv = (*f)(arg, contentInfo.content.signedData->certificates, count);
+    }
+
+done:
+    if (arena) {
+        PORT_FreeArena(arena, PR_FALSE);
+    }
+
+    return rv;
+}
+
+const SEC_ASN1Template SEC_CertSequenceTemplate[] = {
+    { SEC_ASN1_SEQUENCE_OF | SEC_ASN1_XTRN, 0, SEC_ASN1_SUB(SEC_AnyTemplate) }
+};
+
+static SECStatus
+SEC_ReadCertSequence(SECItem *certsItem, CERTImportCertificateFunc f, void *arg)
+{
+    SECStatus rv = SECFailure;
+    SECItem **certs;
+    int count;
+    SECItem **rawCerts = NULL;
+    PLArenaPool *arena;
+    ContentInfo contentInfo;
+
+    arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
+    if (arena == NULL) {
+        return rv;
+    }
+
+    PORT_Memset(&contentInfo, 0, sizeof(contentInfo));
+    if (SEC_ASN1DecodeItem(arena, &contentInfo, ContentInfoTemplate,
+                           certsItem) != SECSuccess) {
+        goto done;
+    }
+
+    if (GetContentTypeTag(&contentInfo) != SEC_OID_NS_TYPE_CERT_SEQUENCE) {
+        goto done;
+    }
+
+    if (SEC_QuickDERDecodeItem(arena, &rawCerts, SEC_CertSequenceTemplate,
+                               contentInfo.content.data) != SECSuccess) {
+        goto done;
+    }
+
+    rv = SECSuccess;
+
+    certs = rawCerts;
+    if (certs) {
+        count = 0;
+
+        while (*certs) {
+            count++;
+            certs++;
+        }
+        rv = (*f)(arg, rawCerts, count);
+    }
+
+done:
+    if (arena) {
+        PORT_FreeArena(arena, PR_FALSE);
+    }
+
+    return rv;
+}
+
+CERTCertificate *
+CERT_ConvertAndDecodeCertificate(char *certstr)
+{
+    CERTCertificate *cert;
+    SECStatus rv;
+    SECItem der;
+
+    rv = ATOB_ConvertAsciiToItem(&der, certstr);
+    if (rv != SECSuccess)
+        return NULL;
+
+    cert = CERT_NewTempCertificate(CERT_GetDefaultCertDB(),
+                                   &der, NULL, PR_FALSE, PR_TRUE);
+
+    PORT_Free(der.data);
+    return cert;
+}
+
+static const char NS_CERT_HEADER[] = "-----BEGIN CERTIFICATE-----";
+static const char NS_CERT_TRAILER[] = "-----END CERTIFICATE-----";
+#define NS_CERT_HEADER_LEN ((sizeof NS_CERT_HEADER) - 1)
+#define NS_CERT_TRAILER_LEN ((sizeof NS_CERT_TRAILER) - 1)
+
+/*
+ * read an old style ascii or binary certificate chain
+ */
+SECStatus
+CERT_DecodeCertPackage(char *certbuf,
+                       int certlen,
+                       CERTImportCertificateFunc f,
+                       void *arg)
+{
+    unsigned char *cp;
+    unsigned char *bincert = NULL;
+    char *ascCert = NULL;
+    SECStatus rv;
+
+    if (certbuf == NULL) {
+        PORT_SetError(SEC_ERROR_INVALID_ARGS);
+        return (SECFailure);
+    }
+    /*
+     * Make sure certlen is long enough to handle the longest possible
+     * reference in the code below:
+     * 0x30 0x84 l1 l2 l3 l4  +
+     *                       tag 9 o1 o2 o3 o4 o5 o6 o7 o8 o9
+     * where 9 is the longest length of the expected oids we are testing.
+     *   6 + 11 = 17. 17 bytes is clearly too small to code any kind of
+     *  certificate (a 128 bit ECC certificate contains at least an 8 byte
+     * key and a 16 byte signature, plus coding overhead). Typically a cert
+     * is much larger. So it's safe to require certlen to be at least 17
+     * bytes.
+     */
+    if (certlen < 17) {
+        PORT_SetError(SEC_ERROR_INPUT_LEN);
+        return (SECFailure);
+    }
+
+    cp = (unsigned char *)certbuf;
+
+    /* is a DER encoded certificate of some type? */
+    if ((*cp & 0x1f) == SEC_ASN1_SEQUENCE) {
+        SECItem certitem;
+        SECItem *pcertitem = &certitem;
+        PRUint64 seqLen, seqLenLen;
+
+        cp++;
+
+        if (*cp & 0x80) {
+            /* Multibyte length */
+            seqLenLen = cp[0] & 0x7f;
+
+            switch (seqLenLen) {
+                case 4:
+                    seqLen = ((unsigned long)cp[1] << 24) |
+                             ((unsigned long)cp[2] << 16) | (cp[3] << 8) | cp[4];
+                    break;
+                case 3:
+                    seqLen = ((unsigned long)cp[1] << 16) | (cp[2] << 8) | cp[3];
+                    break;
+                case 2:
+                    seqLen = (cp[1] << 8) | cp[2];
+                    break;
+                case 1:
+                    seqLen = cp[1];
+                    break;
+                case 0:
+                    /* indefinite length */
+                    seqLen = 0;
+                    break;
+                default:
+                    goto notder;
+            }
+            cp += (seqLenLen + 1);
+
+        } else {
+            seqLenLen = 0;
+            seqLen = *cp;
+            cp++;
+        }
+
+        /* check entire length if definite length */
+        if (seqLen || seqLenLen) {
+            if (certlen != (seqLen + seqLenLen + 2L)) {
+                if (certlen > (seqLen + seqLenLen + 2L))
+                    PORT_SetError(SEC_ERROR_EXTRA_INPUT);
+                else
+                    PORT_SetError(SEC_ERROR_INPUT_LEN);
+                goto notder;
+            }
+        }
+
+        /* check the type oid */
+        if (cp[0] == SEC_ASN1_OBJECT_ID) {
+            SECOidData *oiddata;
+            SECItem oiditem;
+            /* XXX - assume DER encoding of OID len!! */
+            oiditem.len = cp[1];
+            /* if we add an oid below that is longer than 9 bytes, then we
+             * need to change the certlen check at the top of the function
+             * to prevent a buffer overflow
+             */
+            if (oiditem.len > 9) {
+                PORT_SetError(SEC_ERROR_UNRECOGNIZED_OID);
+                return (SECFailure);
+            }
+            oiditem.data = (unsigned char *)&cp[2];
+            oiddata = SECOID_FindOID(&oiditem);
+            if (oiddata == NULL) {
+                return (SECFailure);
+            }
+
+            certitem.data = (unsigned char *)certbuf;
+            certitem.len = certlen;
+
+            switch (oiddata->offset) {
+                case SEC_OID_PKCS7_SIGNED_DATA:
+                    /* oid: 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x07, 0x02 */
+                    return (SEC_ReadPKCS7Certs(&certitem, f, arg));
+                    break;
+                case SEC_OID_NS_TYPE_CERT_SEQUENCE:
+                    /* oid: 0x60, 0x86, 0x48, 0x01, 0x86, 0xf8, 0x42, 0x02, 0x05 */
+                    return (SEC_ReadCertSequence(&certitem, f, arg));
+                    break;
+                default:
+                    break;
+            }
+
+        } else {
+            /* it had better be a certificate by now!! */
+            certitem.data = (unsigned char *)certbuf;
+            certitem.len = certlen;
+
+            rv = (*f)(arg, &pcertitem, 1);
+            return (rv);
+        }
+    }
+
+/* now look for a netscape base64 ascii encoded cert */
+notder : {
+    unsigned char *certbegin = NULL;
+    unsigned char *certend = NULL;
+    char *pc;
+    int cl;
+
+    /* Convert the ASCII data into a nul-terminated string */
+    ascCert = (char *)PORT_Alloc(certlen + 1);
+    if (!ascCert) {
+        rv = SECFailure;
+        goto loser;
+    }
+
+    PORT_Memcpy(ascCert, certbuf, certlen);
+    ascCert[certlen] = '\0';
+
+    pc = PORT_Strchr(ascCert, '\n'); /* find an EOL */
+    if (!pc) {                       /* maybe this is a MAC file */
+        pc = ascCert;
+        while (*pc && NULL != (pc = PORT_Strchr(pc, '\r'))) {
+            *pc++ = '\n';
+        }
+    }
+
+    cp = (unsigned char *)ascCert;
+    cl = certlen;
+
+    /* find the beginning marker */
+    while (cl > NS_CERT_HEADER_LEN) {
+        int found = 0;
+        if (!PORT_Strncasecmp((char *)cp, NS_CERT_HEADER,
+                              NS_CERT_HEADER_LEN)) {
+            cl -= NS_CERT_HEADER_LEN;
+            cp += NS_CERT_HEADER_LEN;
+            found = 1;
+        }
+
+        /* skip to next eol */
+        while (cl && (*cp != '\n')) {
+            cp++;
+            cl--;
+        }
+
+        /* skip all blank lines */
+        while (cl && (*cp == '\n' || *cp == '\r')) {
+            cp++;
+            cl--;
+        }
+        if (cl && found) {
+            certbegin = cp;
+            break;
+        }
+    }
+
+    if (certbegin) {
+        /* find the ending marker */
+        while (cl >= NS_CERT_TRAILER_LEN) {
+            if (!PORT_Strncasecmp((char *)cp, NS_CERT_TRAILER,
+                                  NS_CERT_TRAILER_LEN)) {
+                certend = cp;
+                break;
+            }
+
+            /* skip to next eol */
+            while (cl && (*cp != '\n')) {
+                cp++;
+                cl--;
+            }
+
+            /* skip all blank lines */
+            while (cl && (*cp == '\n' || *cp == '\r')) {
+                cp++;
+                cl--;
+            }
+        }
+    }
+
+    if (certbegin && certend) {
+        unsigned int binLen;
+
+        *certend = 0;
+        /* convert to binary */
+        bincert = ATOB_AsciiToData((char *)certbegin, &binLen);
+        if (!bincert) {
+            rv = SECFailure;
+            goto loser;
+        }
+
+        /* now recurse to decode the binary */
+        rv = CERT_DecodeCertPackage((char *)bincert, binLen, f, arg);
+
+    } else {
+        PORT_SetError(SEC_ERROR_BAD_DER);
+        rv = SECFailure;
+    }
+}
+
+loser:
+
+    if (bincert) {
+        PORT_Free(bincert);
+    }
+
+    if (ascCert) {
+        PORT_Free(ascCert);
+    }
+
+    return (rv);
+}
+
+typedef struct {
+    PLArenaPool *arena;
+    SECItem cert;
+} collect_args;
+
+static SECStatus
+collect_certs(void *arg, SECItem **certs, int numcerts)
+{
+    collect_args *collectArgs = (collect_args *)arg;
+    if (!collectArgs || !collectArgs->arena) {
+        PORT_SetError(SEC_ERROR_INVALID_ARGS);
+        return SECFailure;
+    }
+    if (numcerts < 1 || !certs || !*certs) {
+        PORT_SetError(SEC_ERROR_BAD_DER);
+        return SECFailure;
+    }
+    return SECITEM_CopyItem(collectArgs->arena, &collectArgs->cert, *certs);
+}
+
+/*
+ * read an old style ascii or binary certificate
+ */
+CERTCertificate *
+CERT_DecodeCertFromPackage(char *certbuf, int certlen)
+{
+    collect_args collectArgs;
+    SECStatus rv;
+    CERTCertificate *cert = NULL;
+
+    collectArgs.arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
+
+    rv = CERT_DecodeCertPackage(certbuf, certlen, collect_certs,
+                                (void *)&collectArgs);
+    if (rv == SECSuccess) {
+        cert = CERT_NewTempCertificate(CERT_GetDefaultCertDB(),
+                                       &collectArgs.cert, NULL,
+                                       PR_FALSE, PR_TRUE);
+    }
+
+    PORT_FreeArena(collectArgs.arena, PR_FALSE);
+
+    return (cert);
+}
diff --git a/security/nss/lib/pkcs7/exports.gyp b/security/nss/lib/pkcs7/exports.gyp
new file mode 100644
index 0000000000..e5c9f09275
--- /dev/null
+++ b/security/nss/lib/pkcs7/exports.gyp
@@ -0,0 +1,33 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+{
+  'includes': [
+    '../../coreconf/config.gypi'
+  ],
+  'targets': [
+    {
+      'target_name': 'lib_pkcs7_exports',
+      'type': 'none',
+      'copies': [
+        {
+          'files': [
+            'pkcs7t.h',
+            'secmime.h',
+            'secpkcs7.h'
+          ],
+          'destination': '<(nss_public_dist_dir)/<(module)'
+        },
+        {
+          'files': [
+            'p7local.h'
+          ],
+          'destination': '<(nss_private_dist_dir)/<(module)'
+        }
+      ]
+    }
+  ],
+  'variables': {
+    'module': 'nss'
+  }
+}
diff --git a/security/nss/lib/pkcs7/manifest.mn b/security/nss/lib/pkcs7/manifest.mn
new file mode 100644
index 0000000000..9ca2d4de5e
--- /dev/null
+++ b/security/nss/lib/pkcs7/manifest.mn
@@ -0,0 +1,34 @@
+# 
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+CORE_DEPTH = ../..
+
+EXPORTS = \
+	secmime.h \
+	secpkcs7.h \
+	pkcs7t.h \
+	$(NULL)
+
+PRIVATE_EXPORTS = \
+	p7local.h \
+	$(NULL)
+
+MODULE = nss
+
+CSRCS = \
+	certread.c \
+	p7common.c \
+	p7create.c \
+	p7decode.c \
+	p7encode.c \
+	p7local.c  \
+	secmime.c  \
+	$(NULL)
+
+LIBRARY_NAME = pkcs7
+SHARED_LIBRARY = $(NULL)
+
+# This part of the code, including all sub-dirs, can be optimized for size
+export ALLOW_OPT_CODE_SIZE = 1
diff --git a/security/nss/lib/pkcs7/p7common.c b/security/nss/lib/pkcs7/p7common.c
new file mode 100644
index 0000000000..8a6ac033e5
--- /dev/null
+++ b/security/nss/lib/pkcs7/p7common.c
@@ -0,0 +1,663 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * PKCS7 implementation -- the exported parts that are used whether
+ * creating or decoding.
+ */
+
+#include "p7local.h"
+
+#include "cert.h"
+#include "secitem.h"
+#include "secoid.h"
+#include "pk11func.h"
+
+/*
+ * Find out (saving pointer to lookup result for future reference)
+ * and return the inner content type.
+ */
+SECOidTag
+SEC_PKCS7ContentType(SEC_PKCS7ContentInfo *cinfo)
+{
+    if (cinfo->contentTypeTag == NULL)
+        cinfo->contentTypeTag = SECOID_FindOID(&(cinfo->contentType));
+
+    if (cinfo->contentTypeTag == NULL)
+        return SEC_OID_UNKNOWN;
+
+    return cinfo->contentTypeTag->offset;
+}
+
+/*
+ * Destroy a PKCS7 contentInfo and all of its sub-pieces.
+ */
+void
+SEC_PKCS7DestroyContentInfo(SEC_PKCS7ContentInfo *cinfo)
+{
+    SECOidTag kind;
+    CERTCertificate **certs;
+    CERTCertificateList **certlists;
+    SEC_PKCS7SignerInfo **signerinfos;
+    SEC_PKCS7RecipientInfo **recipientinfos;
+
+    PORT_Assert(cinfo->refCount > 0);
+    if (cinfo->refCount <= 0)
+        return;
+
+    cinfo->refCount--;
+    if (cinfo->refCount > 0)
+        return;
+
+    certs = NULL;
+    certlists = NULL;
+    recipientinfos = NULL;
+    signerinfos = NULL;
+
+    kind = SEC_PKCS7ContentType(cinfo);
+    switch (kind) {
+        case SEC_OID_PKCS7_ENVELOPED_DATA: {
+            SEC_PKCS7EnvelopedData *edp;
+
+            edp = cinfo->content.envelopedData;
+            if (edp != NULL) {
+                recipientinfos = edp->recipientInfos;
+            }
+        } break;
+        case SEC_OID_PKCS7_SIGNED_DATA: {
+            SEC_PKCS7SignedData *sdp;
+
+            sdp = cinfo->content.signedData;
+            if (sdp != NULL) {
+                certs = sdp->certs;
+                certlists = sdp->certLists;
+                signerinfos = sdp->signerInfos;
+            }
+        } break;
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA: {
+            SEC_PKCS7SignedAndEnvelopedData *saedp;
+
+            saedp = cinfo->content.signedAndEnvelopedData;
+            if (saedp != NULL) {
+                certs = saedp->certs;
+                certlists = saedp->certLists;
+                recipientinfos = saedp->recipientInfos;
+                signerinfos = saedp->signerInfos;
+                if (saedp->sigKey != NULL)
+                    PK11_FreeSymKey(saedp->sigKey);
+            }
+        } break;
+        default:
+            /* XXX Anything else that needs to be "manually" freed/destroyed? */
+            break;
+    }
+
+    if (certs != NULL) {
+        CERTCertificate *cert;
+
+        while ((cert = *certs++) != NULL) {
+            CERT_DestroyCertificate(cert);
+        }
+    }
+
+    if (certlists != NULL) {
+        CERTCertificateList *certlist;
+
+        while ((certlist = *certlists++) != NULL) {
+            CERT_DestroyCertificateList(certlist);
+        }
+    }
+
+    if (recipientinfos != NULL) {
+        SEC_PKCS7RecipientInfo *ri;
+
+        while ((ri = *recipientinfos++) != NULL) {
+            if (ri->cert != NULL)
+                CERT_DestroyCertificate(ri->cert);
+        }
+    }
+
+    if (signerinfos != NULL) {
+        SEC_PKCS7SignerInfo *si;
+
+        while ((si = *signerinfos++) != NULL) {
+            if (si->cert != NULL)
+                CERT_DestroyCertificate(si->cert);
+            if (si->certList != NULL)
+                CERT_DestroyCertificateList(si->certList);
+        }
+    }
+
+    if (cinfo->poolp != NULL) {
+        PORT_FreeArena(cinfo->poolp, PR_FALSE); /* XXX clear it? */
+    }
+}
+
+/*
+ * Return a copy of the given contentInfo.  The copy may be virtual
+ * or may be real -- either way, the result needs to be passed to
+ * SEC_PKCS7DestroyContentInfo later (as does the original).
+ */
+SEC_PKCS7ContentInfo *
+SEC_PKCS7CopyContentInfo(SEC_PKCS7ContentInfo *cinfo)
+{
+    if (cinfo == NULL)
+        return NULL;
+
+    PORT_Assert(cinfo->refCount > 0);
+
+    if (cinfo->created) {
+        /*
+         * Want to do a real copy of these; otherwise subsequent
+         * changes made to either copy are likely to be a surprise.
+         * XXX I suspect that this will not actually be called for yet,
+         * which is why the assert, so to notice if it is...
+         */
+        PORT_Assert(0);
+        /*
+         * XXX Create a new pool here, and copy everything from
+         * within.  For cert stuff, need to call the appropriate
+         * copy functions, etc.
+         */
+    }
+
+    cinfo->refCount++;
+    return cinfo;
+}
+
+/*
+ * Return a pointer to the actual content.  In the case of those types
+ * which are encrypted, this returns the *plain* content.
+ * XXX Needs revisiting if/when we handle nested encrypted types.
+ */
+SECItem *
+SEC_PKCS7GetContent(SEC_PKCS7ContentInfo *cinfo)
+{
+    SECOidTag kind;
+
+    kind = SEC_PKCS7ContentType(cinfo);
+    switch (kind) {
+        case SEC_OID_PKCS7_DATA:
+            return cinfo->content.data;
+        case SEC_OID_PKCS7_DIGESTED_DATA: {
+            SEC_PKCS7DigestedData *digd;
+
+            digd = cinfo->content.digestedData;
+            if (digd == NULL)
+                break;
+            return SEC_PKCS7GetContent(&(digd->contentInfo));
+        }
+        case SEC_OID_PKCS7_ENCRYPTED_DATA: {
+            SEC_PKCS7EncryptedData *encd;
+
+            encd = cinfo->content.encryptedData;
+            if (encd == NULL)
+                break;
+            return &(encd->encContentInfo.plainContent);
+        }
+        case SEC_OID_PKCS7_ENVELOPED_DATA: {
+            SEC_PKCS7EnvelopedData *envd;
+
+            envd = cinfo->content.envelopedData;
+            if (envd == NULL)
+                break;
+            return &(envd->encContentInfo.plainContent);
+        }
+        case SEC_OID_PKCS7_SIGNED_DATA: {
+            SEC_PKCS7SignedData *sigd;
+
+            sigd = cinfo->content.signedData;
+            if (sigd == NULL)
+                break;
+            return SEC_PKCS7GetContent(&(sigd->contentInfo));
+        }
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA: {
+            SEC_PKCS7SignedAndEnvelopedData *saed;
+
+            saed = cinfo->content.signedAndEnvelopedData;
+            if (saed == NULL)
+                break;
+            return &(saed->encContentInfo.plainContent);
+        }
+        default:
+            PORT_Assert(0);
+            break;
+    }
+
+    return NULL;
+}
+
+/*
+ * XXX Fix the placement and formatting of the
+ * following routines (i.e. make them consistent with the rest of
+ * the pkcs7 code -- I think some/many belong in other files and
+ * they all need a formatting/style rehaul)
+ */
+
+/* retrieve the algorithm identifier for encrypted data.
+ * the identifier returned is a copy of the algorithm identifier
+ * in the content info and needs to be freed after being used.
+ *
+ *   cinfo is the content info for which to retrieve the
+ *     encryption algorithm.
+ *
+ * if the content info is not encrypted data or an error
+ * occurs NULL is returned.
+ */
+SECAlgorithmID *
+SEC_PKCS7GetEncryptionAlgorithm(SEC_PKCS7ContentInfo *cinfo)
+{
+    SECAlgorithmID *alg = 0;
+    switch (SEC_PKCS7ContentType(cinfo)) {
+        case SEC_OID_PKCS7_ENCRYPTED_DATA:
+            alg = &cinfo->content.encryptedData->encContentInfo.contentEncAlg;
+            break;
+        case SEC_OID_PKCS7_ENVELOPED_DATA:
+            alg = &cinfo->content.envelopedData->encContentInfo.contentEncAlg;
+            break;
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA:
+            alg = &cinfo->content.signedAndEnvelopedData
+                       ->encContentInfo.contentEncAlg;
+            break;
+        default:
+            alg = 0;
+            break;
+    }
+
+    return alg;
+}
+
+/* set the content of the content info.  For data content infos,
+ * the data is set.  For encrytped content infos, the plainContent
+ * is set, and is expected to be encrypted later.
+ *
+ * cinfo is the content info where the data will be set
+ *
+ * buf is a buffer of the data to set
+ *
+ * len is the length of the data being set.
+ *
+ * in the event of an error, SECFailure is returned.  SECSuccess
+ * indicates the content was successfully set.
+ */
+SECStatus
+SEC_PKCS7SetContent(SEC_PKCS7ContentInfo *cinfo,
+                    const char *buf,
+                    unsigned long len)
+{
+    SECOidTag cinfo_type;
+    SECStatus rv;
+    SECItem content;
+    SECOidData *contentTypeTag = NULL;
+
+    content.type = siBuffer;
+    content.data = (unsigned char *)buf;
+    content.len = len;
+
+    cinfo_type = SEC_PKCS7ContentType(cinfo);
+
+    /* set inner content */
+    switch (cinfo_type) {
+        case SEC_OID_PKCS7_SIGNED_DATA:
+            if (content.len > 0) {
+                /* we "leak" the old content here, but as it's all in the pool */
+                /* it does not really matter */
+
+                /* create content item if necessary */
+                if (cinfo->content.signedData->contentInfo.content.data == NULL)
+                    cinfo->content.signedData->contentInfo.content.data = SECITEM_AllocItem(cinfo->poolp, NULL, 0);
+                rv = SECITEM_CopyItem(cinfo->poolp,
+                                      cinfo->content.signedData->contentInfo.content.data,
+                                      &content);
+            } else {
+                cinfo->content.signedData->contentInfo.content.data->data = NULL;
+                cinfo->content.signedData->contentInfo.content.data->len = 0;
+                rv = SECSuccess;
+            }
+            if (rv == SECFailure)
+                goto loser;
+
+            break;
+        case SEC_OID_PKCS7_ENCRYPTED_DATA:
+            /* XXX this forces the inner content type to be "data" */
+            /* do we really want to override without asking or reason? */
+            contentTypeTag = SECOID_FindOIDByTag(SEC_OID_PKCS7_DATA);
+            if (contentTypeTag == NULL)
+                goto loser;
+            rv = SECITEM_CopyItem(cinfo->poolp,
+                                  &(cinfo->content.encryptedData->encContentInfo.contentType),
+                                  &(contentTypeTag->oid));
+            if (rv == SECFailure)
+                goto loser;
+            if (content.len > 0) {
+                rv = SECITEM_CopyItem(cinfo->poolp,
+                                      &(cinfo->content.encryptedData->encContentInfo.plainContent),
+                                      &content);
+            } else {
+                cinfo->content.encryptedData->encContentInfo.plainContent.data = NULL;
+                cinfo->content.encryptedData->encContentInfo.encContent.data = NULL;
+                cinfo->content.encryptedData->encContentInfo.plainContent.len = 0;
+                cinfo->content.encryptedData->encContentInfo.encContent.len = 0;
+                rv = SECSuccess;
+            }
+            if (rv == SECFailure)
+                goto loser;
+            break;
+        case SEC_OID_PKCS7_DATA:
+            cinfo->content.data = (SECItem *)PORT_ArenaZAlloc(cinfo->poolp,
+                                                              sizeof(SECItem));
+            if (cinfo->content.data == NULL)
+                goto loser;
+            if (content.len > 0) {
+                rv = SECITEM_CopyItem(cinfo->poolp,
+                                      cinfo->content.data, &content);
+            } else {
+                /* handle case with NULL content */
+                rv = SECSuccess;
+            }
+            if (rv == SECFailure)
+                goto loser;
+            break;
+        default:
+            goto loser;
+    }
+
+    return SECSuccess;
+
+loser:
+
+    return SECFailure;
+}
+
+/* the content of an encrypted data content info is encrypted.
+ * it is assumed that for encrypted data, that the data has already
+ * been set and is in the "plainContent" field of the content info.
+ *
+ * cinfo is the content info to encrypt
+ *
+ * key is the key with which to perform the encryption.  if the
+ *     algorithm is a password based encryption algorithm, the
+ *     key is actually a password which will be processed per
+ *     PKCS #5.
+ *
+ * in the event of an error, SECFailure is returned.  SECSuccess
+ * indicates a success.
+ */
+SECStatus
+SEC_PKCS7EncryptContents(PLArenaPool *poolp,
+                         SEC_PKCS7ContentInfo *cinfo,
+                         SECItem *key,
+                         void *wincx)
+{
+    SECAlgorithmID *algid = NULL;
+    SECItem *src;
+    SECItem *dest;
+    SECItem *blocked_data = NULL;
+    void *mark;
+    void *cx;
+    PK11SymKey *eKey = NULL;
+    PK11SlotInfo *slot = NULL;
+
+    CK_MECHANISM_TYPE cryptoMechType;
+    int bs;
+    SECStatus rv = SECFailure;
+    SECItem *c_param = NULL;
+
+    if ((cinfo == NULL) || (key == NULL))
+        return SECFailure;
+
+    if (SEC_PKCS7ContentType(cinfo) != SEC_OID_PKCS7_ENCRYPTED_DATA)
+        return SECFailure;
+
+    algid = SEC_PKCS7GetEncryptionAlgorithm(cinfo);
+    if (algid == NULL)
+        return SECFailure;
+
+    if (poolp == NULL)
+        poolp = cinfo->poolp;
+
+    mark = PORT_ArenaMark(poolp);
+
+    src = &cinfo->content.encryptedData->encContentInfo.plainContent;
+    dest = &cinfo->content.encryptedData->encContentInfo.encContent;
+    dest->data = (unsigned char *)PORT_ArenaZAlloc(poolp, (src->len + 64));
+    dest->len = (src->len + 64);
+    if (dest->data == NULL) {
+        rv = SECFailure;
+        goto loser;
+    }
+
+    slot = PK11_GetInternalKeySlot();
+    if (slot == NULL) {
+        rv = SECFailure;
+        goto loser;
+    }
+
+    eKey = PK11_PBEKeyGen(slot, algid, key, PR_FALSE, wincx);
+    if (eKey == NULL) {
+        rv = SECFailure;
+        goto loser;
+    }
+
+    cryptoMechType = PK11_GetPBECryptoMechanism(algid, &c_param, key);
+    if (cryptoMechType == CKM_INVALID_MECHANISM) {
+        rv = SECFailure;
+        goto loser;
+    }
+
+    /* block according to PKCS 8 */
+    bs = PK11_GetBlockSize(cryptoMechType, c_param);
+    rv = SECSuccess;
+    if (bs) {
+        char pad_char;
+        pad_char = (char)(bs - (src->len % bs));
+        if (src->len % bs) {
+            rv = SECSuccess;
+            blocked_data = PK11_BlockData(src, bs);
+            if (blocked_data) {
+                PORT_Memset((blocked_data->data + blocked_data->len - (int)pad_char),
+                            pad_char, (int)pad_char);
+            } else {
+                rv = SECFailure;
+                goto loser;
+            }
+        } else {
+            blocked_data = SECITEM_DupItem(src);
+            if (blocked_data) {
+                blocked_data->data = (unsigned char *)PORT_Realloc(
+                    blocked_data->data,
+                    blocked_data->len + bs);
+                if (blocked_data->data) {
+                    blocked_data->len += bs;
+                    PORT_Memset((blocked_data->data + src->len), (char)bs, bs);
+                } else {
+                    rv = SECFailure;
+                    goto loser;
+                }
+            } else {
+                rv = SECFailure;
+                goto loser;
+            }
+        }
+    } else {
+        blocked_data = SECITEM_DupItem(src);
+        if (!blocked_data) {
+            rv = SECFailure;
+            goto loser;
+        }
+    }
+
+    cx = PK11_CreateContextBySymKey(cryptoMechType, CKA_ENCRYPT,
+                                    eKey, c_param);
+    if (cx == NULL) {
+        rv = SECFailure;
+        goto loser;
+    }
+
+    rv = PK11_CipherOp((PK11Context *)cx, dest->data, (int *)(&dest->len),
+                       (int)(src->len + 64), blocked_data->data,
+                       (int)blocked_data->len);
+    PK11_DestroyContext((PK11Context *)cx, PR_TRUE);
+
+loser:
+    /* let success fall through */
+    if (blocked_data != NULL)
+        SECITEM_ZfreeItem(blocked_data, PR_TRUE);
+
+    if (rv == SECFailure)
+        PORT_ArenaRelease(poolp, mark);
+    else
+        PORT_ArenaUnmark(poolp, mark);
+
+    if (eKey != NULL)
+        PK11_FreeSymKey(eKey);
+
+    if (slot != NULL)
+        PK11_FreeSlot(slot);
+
+    if (c_param != NULL)
+        SECITEM_ZfreeItem(c_param, PR_TRUE);
+
+    return rv;
+}
+
+/* the content of an encrypted data content info is decrypted.
+ * it is assumed that for encrypted data, that the data has already
+ * been set and is in the "encContent" field of the content info.
+ *
+ * cinfo is the content info to decrypt
+ *
+ * key is the key with which to perform the decryption.  if the
+ *     algorithm is a password based encryption algorithm, the
+ *     key is actually a password which will be processed per
+ *     PKCS #5.
+ *
+ * in the event of an error, SECFailure is returned.  SECSuccess
+ * indicates a success.
+ */
+SECStatus
+SEC_PKCS7DecryptContents(PLArenaPool *poolp,
+                         SEC_PKCS7ContentInfo *cinfo,
+                         SECItem *key,
+                         void *wincx)
+{
+    SECAlgorithmID *algid = NULL;
+    SECStatus rv = SECFailure;
+    SECItem *dest, *src;
+    void *mark;
+
+    PK11SymKey *eKey = NULL;
+    PK11SlotInfo *slot = NULL;
+    CK_MECHANISM_TYPE cryptoMechType;
+    void *cx;
+    SECItem *c_param = NULL;
+    int bs;
+
+    if ((cinfo == NULL) || (key == NULL))
+        return SECFailure;
+
+    if (SEC_PKCS7ContentType(cinfo) != SEC_OID_PKCS7_ENCRYPTED_DATA)
+        return SECFailure;
+
+    algid = SEC_PKCS7GetEncryptionAlgorithm(cinfo);
+    if (algid == NULL)
+        return SECFailure;
+
+    if (poolp == NULL)
+        poolp = cinfo->poolp;
+
+    mark = PORT_ArenaMark(poolp);
+
+    src = &cinfo->content.encryptedData->encContentInfo.encContent;
+    dest = &cinfo->content.encryptedData->encContentInfo.plainContent;
+    dest->data = (unsigned char *)PORT_ArenaZAlloc(poolp, (src->len + 64));
+    dest->len = (src->len + 64);
+    if (dest->data == NULL) {
+        rv = SECFailure;
+        goto loser;
+    }
+
+    slot = PK11_GetInternalKeySlot();
+    if (slot == NULL) {
+        rv = SECFailure;
+        goto loser;
+    }
+
+    eKey = PK11_PBEKeyGen(slot, algid, key, PR_FALSE, wincx);
+    if (eKey == NULL) {
+        rv = SECFailure;
+        goto loser;
+    }
+
+    cryptoMechType = PK11_GetPBECryptoMechanism(algid, &c_param, key);
+    if (cryptoMechType == CKM_INVALID_MECHANISM) {
+        rv = SECFailure;
+        goto loser;
+    }
+
+    cx = PK11_CreateContextBySymKey(cryptoMechType, CKA_DECRYPT,
+                                    eKey, c_param);
+    if (cx == NULL) {
+        rv = SECFailure;
+        goto loser;
+    }
+
+    rv = PK11_CipherOp((PK11Context *)cx, dest->data, (int *)(&dest->len),
+                       (int)(src->len + 64), src->data, (int)src->len);
+    PK11_DestroyContext((PK11Context *)cx, PR_TRUE);
+
+    bs = PK11_GetBlockSize(cryptoMechType, c_param);
+    if (bs) {
+        /* check for proper badding in block algorithms.  this assumes
+         * RC2 cbc or a DES cbc variant.  and the padding is thus defined
+         */
+        if (((int)dest->data[dest->len - 1] <= bs) &&
+            ((int)dest->data[dest->len - 1] > 0)) {
+            dest->len -= (int)dest->data[dest->len - 1];
+        } else {
+            rv = SECFailure;
+            /* set an error ? */
+        }
+    }
+
+loser:
+    /* let success fall through */
+    if (rv == SECFailure)
+        PORT_ArenaRelease(poolp, mark);
+    else
+        PORT_ArenaUnmark(poolp, mark);
+
+    if (eKey != NULL)
+        PK11_FreeSymKey(eKey);
+
+    if (slot != NULL)
+        PK11_FreeSlot(slot);
+
+    if (c_param != NULL)
+        SECITEM_ZfreeItem(c_param, PR_TRUE);
+
+    return rv;
+}
+
+SECItem **
+SEC_PKCS7GetCertificateList(SEC_PKCS7ContentInfo *cinfo)
+{
+    switch (SEC_PKCS7ContentType(cinfo)) {
+        case SEC_OID_PKCS7_SIGNED_DATA:
+            return cinfo->content.signedData->rawCerts;
+            break;
+        default:
+            return NULL;
+            break;
+    }
+}
+
+int
+SEC_PKCS7GetKeyLength(SEC_PKCS7ContentInfo *cinfo)
+{
+    if (cinfo->contentTypeTag->offset == SEC_OID_PKCS7_ENVELOPED_DATA)
+        return cinfo->content.envelopedData->encContentInfo.keysize;
+    else
+        return 0;
+}
diff --git a/security/nss/lib/pkcs7/p7create.c b/security/nss/lib/pkcs7/p7create.c
new file mode 100644
index 0000000000..f193303862
--- /dev/null
+++ b/security/nss/lib/pkcs7/p7create.c
@@ -0,0 +1,1306 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * PKCS7 creation.
+ */
+
+#include "p7local.h"
+
+#include "cert.h"
+#include "secasn1.h"
+#include "secitem.h"
+#include "secoid.h"
+#include "pk11func.h"
+#include "prtime.h"
+#include "secerr.h"
+#include "secder.h"
+#include "secpkcs5.h"
+
+const int NSS_PBE_DEFAULT_ITERATION_COUNT = /* used in p12e.c too */
+#ifdef DEBUG
+    10000
+#else
+    600000
+#endif
+    ;
+
+static SECStatus
+sec_pkcs7_init_content_info(SEC_PKCS7ContentInfo *cinfo, PLArenaPool *poolp,
+                            SECOidTag kind, PRBool detached)
+{
+    void *thing;
+    int version;
+    SECItem *versionp;
+    SECStatus rv;
+
+    PORT_Assert(cinfo != NULL && poolp != NULL);
+    if (cinfo == NULL || poolp == NULL)
+        return SECFailure;
+
+    cinfo->contentTypeTag = SECOID_FindOIDByTag(kind);
+    PORT_Assert(cinfo->contentTypeTag && cinfo->contentTypeTag->offset == kind);
+
+    rv = SECITEM_CopyItem(poolp, &(cinfo->contentType),
+                          &(cinfo->contentTypeTag->oid));
+    if (rv != SECSuccess)
+        return rv;
+
+    if (detached)
+        return SECSuccess;
+
+    switch (kind) {
+        default:
+        case SEC_OID_PKCS7_DATA:
+            thing = PORT_ArenaZAlloc(poolp, sizeof(SECItem));
+            cinfo->content.data = (SECItem *)thing;
+            versionp = NULL;
+            version = -1;
+            break;
+        case SEC_OID_PKCS7_DIGESTED_DATA:
+            thing = PORT_ArenaZAlloc(poolp, sizeof(SEC_PKCS7DigestedData));
+            cinfo->content.digestedData = (SEC_PKCS7DigestedData *)thing;
+            versionp = &(cinfo->content.digestedData->version);
+            version = SEC_PKCS7_DIGESTED_DATA_VERSION;
+            break;
+        case SEC_OID_PKCS7_ENCRYPTED_DATA:
+            thing = PORT_ArenaZAlloc(poolp, sizeof(SEC_PKCS7EncryptedData));
+            cinfo->content.encryptedData = (SEC_PKCS7EncryptedData *)thing;
+            versionp = &(cinfo->content.encryptedData->version);
+            version = SEC_PKCS7_ENCRYPTED_DATA_VERSION;
+            break;
+        case SEC_OID_PKCS7_ENVELOPED_DATA:
+            thing = PORT_ArenaZAlloc(poolp, sizeof(SEC_PKCS7EnvelopedData));
+            cinfo->content.envelopedData =
+                (SEC_PKCS7EnvelopedData *)thing;
+            versionp = &(cinfo->content.envelopedData->version);
+            version = SEC_PKCS7_ENVELOPED_DATA_VERSION;
+            break;
+        case SEC_OID_PKCS7_SIGNED_DATA:
+            thing = PORT_ArenaZAlloc(poolp, sizeof(SEC_PKCS7SignedData));
+            cinfo->content.signedData =
+                (SEC_PKCS7SignedData *)thing;
+            versionp = &(cinfo->content.signedData->version);
+            version = SEC_PKCS7_SIGNED_DATA_VERSION;
+            break;
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA:
+            thing = PORT_ArenaZAlloc(poolp, sizeof(SEC_PKCS7SignedAndEnvelopedData));
+            cinfo->content.signedAndEnvelopedData =
+                (SEC_PKCS7SignedAndEnvelopedData *)thing;
+            versionp = &(cinfo->content.signedAndEnvelopedData->version);
+            version = SEC_PKCS7_SIGNED_AND_ENVELOPED_DATA_VERSION;
+            break;
+    }
+
+    if (thing == NULL)
+        return SECFailure;
+
+    if (versionp != NULL) {
+        SECItem *dummy;
+
+        PORT_Assert(version >= 0);
+        dummy = SEC_ASN1EncodeInteger(poolp, versionp, version);
+        if (dummy == NULL)
+            return SECFailure;
+        PORT_Assert(dummy == versionp);
+    }
+
+    return SECSuccess;
+}
+
+static SEC_PKCS7ContentInfo *
+sec_pkcs7_create_content_info(SECOidTag kind, PRBool detached,
+                              SECKEYGetPasswordKey pwfn, void *pwfn_arg)
+{
+    SEC_PKCS7ContentInfo *cinfo;
+    PLArenaPool *poolp;
+    SECStatus rv;
+
+    poolp = PORT_NewArena(1024); /* XXX what is right value? */
+    if (poolp == NULL)
+        return NULL;
+
+    cinfo = (SEC_PKCS7ContentInfo *)PORT_ArenaZAlloc(poolp, sizeof(*cinfo));
+    if (cinfo == NULL) {
+        PORT_FreeArena(poolp, PR_FALSE);
+        return NULL;
+    }
+
+    cinfo->poolp = poolp;
+    cinfo->pwfn = pwfn;
+    cinfo->pwfn_arg = pwfn_arg;
+    cinfo->created = PR_TRUE;
+    cinfo->refCount = 1;
+
+    rv = sec_pkcs7_init_content_info(cinfo, poolp, kind, detached);
+    if (rv != SECSuccess) {
+        PORT_FreeArena(poolp, PR_FALSE);
+        return NULL;
+    }
+
+    return cinfo;
+}
+
+/*
+ * Add a signer to a PKCS7 thing, verifying the signature cert first.
+ * Any error returns SECFailure.
+ *
+ * XXX Right now this only adds the *first* signer.  It fails if you try
+ * to add a second one -- this needs to be fixed.
+ */
+static SECStatus
+sec_pkcs7_add_signer(SEC_PKCS7ContentInfo *cinfo,
+                     CERTCertificate *cert,
+                     SECCertUsage certusage,
+                     CERTCertDBHandle *certdb,
+                     SECOidTag digestalgtag,
+                     SECItem *digestdata)
+{
+    SEC_PKCS7SignerInfo *signerinfo, **signerinfos, ***signerinfosp;
+    SECAlgorithmID *digestalg, **digestalgs, ***digestalgsp;
+    SECItem *digest, **digests, ***digestsp;
+    SECItem *dummy;
+    void *mark;
+    SECStatus rv;
+    SECOidTag kind;
+
+    kind = SEC_PKCS7ContentType(cinfo);
+    switch (kind) {
+        case SEC_OID_PKCS7_SIGNED_DATA: {
+            SEC_PKCS7SignedData *sdp;
+
+            sdp = cinfo->content.signedData;
+            digestalgsp = &(sdp->digestAlgorithms);
+            digestsp = &(sdp->digests);
+            signerinfosp = &(sdp->signerInfos);
+        } break;
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA: {
+            SEC_PKCS7SignedAndEnvelopedData *saedp;
+
+            saedp = cinfo->content.signedAndEnvelopedData;
+            digestalgsp = &(saedp->digestAlgorithms);
+            digestsp = &(saedp->digests);
+            signerinfosp = &(saedp->signerInfos);
+        } break;
+        default:
+            return SECFailure; /* XXX set an error? */
+    }
+
+    /*
+     * XXX I think that CERT_VerifyCert should do this if *it* is passed
+     * a NULL database.
+     */
+    if (certdb == NULL) {
+        certdb = CERT_GetDefaultCertDB();
+        if (certdb == NULL)
+            return SECFailure; /* XXX set an error? */
+    }
+
+    if (CERT_VerifyCert(certdb, cert, PR_TRUE, certusage, PR_Now(),
+                        cinfo->pwfn_arg, NULL) != SECSuccess) {
+        /* XXX Did CERT_VerifyCert set an error? */
+        return SECFailure;
+    }
+
+    /*
+     * XXX This is the check that we do not already have a signer.
+     * This is not what we really want -- we want to allow this
+     * and *add* the new signer.
+     */
+    PORT_Assert(*signerinfosp == NULL && *digestalgsp == NULL && *digestsp == NULL);
+    if (*signerinfosp != NULL || *digestalgsp != NULL || *digestsp != NULL)
+        return SECFailure;
+
+    mark = PORT_ArenaMark(cinfo->poolp);
+
+    signerinfo = (SEC_PKCS7SignerInfo *)PORT_ArenaZAlloc(cinfo->poolp,
+                                                         sizeof(SEC_PKCS7SignerInfo));
+    if (signerinfo == NULL) {
+        PORT_ArenaRelease(cinfo->poolp, mark);
+        return SECFailure;
+    }
+
+    dummy = SEC_ASN1EncodeInteger(cinfo->poolp, &signerinfo->version,
+                                  SEC_PKCS7_SIGNER_INFO_VERSION);
+    if (dummy == NULL) {
+        PORT_ArenaRelease(cinfo->poolp, mark);
+        return SECFailure;
+    }
+    PORT_Assert(dummy == &signerinfo->version);
+
+    signerinfo->cert = CERT_DupCertificate(cert);
+    if (signerinfo->cert == NULL) {
+        PORT_ArenaRelease(cinfo->poolp, mark);
+        return SECFailure;
+    }
+
+    signerinfo->issuerAndSN = CERT_GetCertIssuerAndSN(cinfo->poolp, cert);
+    if (signerinfo->issuerAndSN == NULL) {
+        PORT_ArenaRelease(cinfo->poolp, mark);
+        return SECFailure;
+    }
+
+    rv = SECOID_SetAlgorithmID(cinfo->poolp, &signerinfo->digestAlg,
+                               digestalgtag, NULL);
+    if (rv != SECSuccess) {
+        PORT_ArenaRelease(cinfo->poolp, mark);
+        return SECFailure;
+    }
+
+    /*
+     * Okay, now signerinfo is all set.  We just need to put it and its
+     * companions (another copy of the digest algorithm, and the digest
+     * itself if given) into the main structure.
+     *
+     * XXX If we are handling more than one signer, the following code
+     * needs to look through the digest algorithms already specified
+     * and see if the same one is there already.  If it is, it does not
+     * need to be added again.  Also, if it is there *and* the digest
+     * is not null, then the digest given should match the digest already
+     * specified -- if not, that is an error.  Finally, the new signerinfo
+     * should be *added* to the set already found.
+     */
+
+    signerinfos = (SEC_PKCS7SignerInfo **)PORT_ArenaAlloc(cinfo->poolp,
+                                                          2 * sizeof(SEC_PKCS7SignerInfo *));
+    if (signerinfos == NULL) {
+        PORT_ArenaRelease(cinfo->poolp, mark);
+        return SECFailure;
+    }
+    signerinfos[0] = signerinfo;
+    signerinfos[1] = NULL;
+
+    digestalg = PORT_ArenaZAlloc(cinfo->poolp, sizeof(SECAlgorithmID));
+    digestalgs = PORT_ArenaAlloc(cinfo->poolp, 2 * sizeof(SECAlgorithmID *));
+    if (digestalg == NULL || digestalgs == NULL) {
+        PORT_ArenaRelease(cinfo->poolp, mark);
+        return SECFailure;
+    }
+    rv = SECOID_SetAlgorithmID(cinfo->poolp, digestalg, digestalgtag, NULL);
+    if (rv != SECSuccess) {
+        PORT_ArenaRelease(cinfo->poolp, mark);
+        return SECFailure;
+    }
+    digestalgs[0] = digestalg;
+    digestalgs[1] = NULL;
+
+    if (digestdata != NULL) {
+        digest = (SECItem *)PORT_ArenaAlloc(cinfo->poolp, sizeof(SECItem));
+        digests = (SECItem **)PORT_ArenaAlloc(cinfo->poolp,
+                                              2 * sizeof(SECItem *));
+        if (digest == NULL || digests == NULL) {
+            PORT_ArenaRelease(cinfo->poolp, mark);
+            return SECFailure;
+        }
+        rv = SECITEM_CopyItem(cinfo->poolp, digest, digestdata);
+        if (rv != SECSuccess) {
+            PORT_ArenaRelease(cinfo->poolp, mark);
+            return SECFailure;
+        }
+        digests[0] = digest;
+        digests[1] = NULL;
+    } else {
+        digests = NULL;
+    }
+
+    *signerinfosp = signerinfos;
+    *digestalgsp = digestalgs;
+    *digestsp = digests;
+
+    PORT_ArenaUnmark(cinfo->poolp, mark);
+    return SECSuccess;
+}
+
+/*
+ * Helper function for creating an empty signedData.
+ */
+static SEC_PKCS7ContentInfo *
+sec_pkcs7_create_signed_data(SECKEYGetPasswordKey pwfn, void *pwfn_arg)
+{
+    SEC_PKCS7ContentInfo *cinfo;
+    SEC_PKCS7SignedData *sigd;
+    SECStatus rv;
+
+    cinfo = sec_pkcs7_create_content_info(SEC_OID_PKCS7_SIGNED_DATA, PR_FALSE,
+                                          pwfn, pwfn_arg);
+    if (cinfo == NULL)
+        return NULL;
+
+    sigd = cinfo->content.signedData;
+    PORT_Assert(sigd != NULL);
+
+    /*
+     * XXX Might we want to allow content types other than data?
+     * If so, via what interface?
+     */
+    rv = sec_pkcs7_init_content_info(&(sigd->contentInfo), cinfo->poolp,
+                                     SEC_OID_PKCS7_DATA, PR_TRUE);
+    if (rv != SECSuccess) {
+        SEC_PKCS7DestroyContentInfo(cinfo);
+        return NULL;
+    }
+
+    return cinfo;
+}
+
+/*
+ * Start a PKCS7 signing context.
+ *
+ * "cert" is the cert that will be used to sign the data.  It will be
+ * checked for validity.
+ *
+ * "certusage" describes the signing usage (e.g. certUsageEmailSigner)
+ * XXX Maybe SECCertUsage should be split so that our caller just says
+ * "email" and *we* add the "signing" part -- otherwise our caller
+ * could be lying about the usage; we do not want to allow encryption
+ * certs for signing or vice versa.
+ *
+ * "certdb" is the cert database to use for verifying the cert.
+ * It can be NULL if a default database is available (like in the client).
+ * 
+ * "digestalg" names the digest algorithm (e.g. SEC_OID_SHA1).
+ *
+ * "digest" is the actual digest of the data.  It must be provided in
+ * the case of detached data or NULL if the content will be included.
+ *
+ * The return value can be passed to functions which add things to
+ * it like attributes, then eventually to SEC_PKCS7Encode() or to
+ * SEC_PKCS7EncoderStart() to create the encoded data, and finally to
+ * SEC_PKCS7DestroyContentInfo().
+ *
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+SEC_PKCS7ContentInfo *
+SEC_PKCS7CreateSignedData(CERTCertificate *cert,
+                          SECCertUsage certusage,
+                          CERTCertDBHandle *certdb,
+                          SECOidTag digestalg,
+                          SECItem *digest,
+                          SECKEYGetPasswordKey pwfn, void *pwfn_arg)
+{
+    SEC_PKCS7ContentInfo *cinfo;
+    SECStatus rv;
+
+    cinfo = sec_pkcs7_create_signed_data(pwfn, pwfn_arg);
+    if (cinfo == NULL)
+        return NULL;
+
+    rv = sec_pkcs7_add_signer(cinfo, cert, certusage, certdb,
+                              digestalg, digest);
+    if (rv != SECSuccess) {
+        SEC_PKCS7DestroyContentInfo(cinfo);
+        return NULL;
+    }
+
+    return cinfo;
+}
+
+static SEC_PKCS7Attribute *
+sec_pkcs7_create_attribute(PLArenaPool *poolp, SECOidTag oidtag,
+                           SECItem *value, PRBool encoded)
+{
+    SEC_PKCS7Attribute *attr;
+    SECItem **values;
+    void *mark;
+
+    PORT_Assert(poolp != NULL);
+    mark = PORT_ArenaMark(poolp);
+
+    attr = (SEC_PKCS7Attribute *)PORT_ArenaAlloc(poolp,
+                                                 sizeof(SEC_PKCS7Attribute));
+    if (attr == NULL)
+        goto loser;
+
+    attr->typeTag = SECOID_FindOIDByTag(oidtag);
+    if (attr->typeTag == NULL)
+        goto loser;
+
+    if (SECITEM_CopyItem(poolp, &(attr->type),
+                         &(attr->typeTag->oid)) != SECSuccess)
+        goto loser;
+
+    values = (SECItem **)PORT_ArenaAlloc(poolp, 2 * sizeof(SECItem *));
+    if (values == NULL)
+        goto loser;
+
+    if (value != NULL) {
+        SECItem *copy;
+
+        copy = (SECItem *)PORT_ArenaAlloc(poolp, sizeof(SECItem));
+        if (copy == NULL)
+            goto loser;
+
+        if (SECITEM_CopyItem(poolp, copy, value) != SECSuccess)
+            goto loser;
+
+        value = copy;
+    }
+
+    values[0] = value;
+    values[1] = NULL;
+    attr->values = values;
+    attr->encoded = encoded;
+
+    PORT_ArenaUnmark(poolp, mark);
+    return attr;
+
+loser:
+    PORT_Assert(mark != NULL);
+    PORT_ArenaRelease(poolp, mark);
+    return NULL;
+}
+
+static SECStatus
+sec_pkcs7_add_attribute(SEC_PKCS7ContentInfo *cinfo,
+                        SEC_PKCS7Attribute ***attrsp,
+                        SEC_PKCS7Attribute *attr)
+{
+    SEC_PKCS7Attribute **attrs;
+    SECItem *ct_value;
+    void *mark;
+
+    PORT_Assert(SEC_PKCS7ContentType(cinfo) == SEC_OID_PKCS7_SIGNED_DATA);
+    if (SEC_PKCS7ContentType(cinfo) != SEC_OID_PKCS7_SIGNED_DATA)
+        return SECFailure;
+
+    attrs = *attrsp;
+    if (attrs != NULL) {
+        int count;
+
+        /*
+	 * We already have some attributes, and just need to add this
+	 * new one.
+	 */
+
+        /*
+	 * We should already have the *required* attributes, which were
+	 * created/added at the same time the first attribute was added.
+	 */
+        PORT_Assert(sec_PKCS7FindAttribute(attrs,
+                                           SEC_OID_PKCS9_CONTENT_TYPE,
+                                           PR_FALSE) != NULL);
+        PORT_Assert(sec_PKCS7FindAttribute(attrs,
+                                           SEC_OID_PKCS9_MESSAGE_DIGEST,
+                                           PR_FALSE) != NULL);
+
+        for (count = 0; attrs[count] != NULL; count++)
+            ;
+        attrs = (SEC_PKCS7Attribute **)PORT_ArenaGrow(cinfo->poolp, attrs,
+                                                      (count + 1) * sizeof(SEC_PKCS7Attribute *),
+                                                      (count + 2) * sizeof(SEC_PKCS7Attribute *));
+        if (attrs == NULL)
+            return SECFailure;
+
+        attrs[count] = attr;
+        attrs[count + 1] = NULL;
+        *attrsp = attrs;
+
+        return SECSuccess;
+    }
+
+    /*
+     * This is the first time an attribute is going in.
+     * We need to create and add the required attributes, and then
+     * we will also add in the one our caller gave us.
+     */
+
+    /*
+     * There are 2 required attributes, plus the one our caller wants
+     * to add, plus we always end with a NULL one.  Thus, four slots.
+     */
+    attrs = (SEC_PKCS7Attribute **)PORT_ArenaAlloc(cinfo->poolp,
+                                                   4 * sizeof(SEC_PKCS7Attribute *));
+    if (attrs == NULL)
+        return SECFailure;
+
+    mark = PORT_ArenaMark(cinfo->poolp);
+
+    /*
+     * First required attribute is the content type of the data
+     * being signed.
+     */
+    ct_value = &(cinfo->content.signedData->contentInfo.contentType);
+    attrs[0] = sec_pkcs7_create_attribute(cinfo->poolp,
+                                          SEC_OID_PKCS9_CONTENT_TYPE,
+                                          ct_value, PR_FALSE);
+    /*
+     * Second required attribute is the message digest of the data
+     * being signed; we leave the value NULL for now (just create
+     * the place for it to go), and the encoder will fill it in later.
+     */
+    attrs[1] = sec_pkcs7_create_attribute(cinfo->poolp,
+                                          SEC_OID_PKCS9_MESSAGE_DIGEST,
+                                          NULL, PR_FALSE);
+    if (attrs[0] == NULL || attrs[1] == NULL) {
+        PORT_ArenaRelease(cinfo->poolp, mark);
+        return SECFailure;
+    }
+
+    attrs[2] = attr;
+    attrs[3] = NULL;
+    *attrsp = attrs;
+
+    PORT_ArenaUnmark(cinfo->poolp, mark);
+    return SECSuccess;
+}
+
+/*
+ * Add the signing time to the authenticated (i.e. signed) attributes
+ * of "cinfo".  This is expected to be included in outgoing signed
+ * messages for email (S/MIME) but is likely useful in other situations.
+ *
+ * This should only be added once; a second call will either do
+ * nothing or replace an old signing time with a newer one.
+ *
+ * XXX This will probably just shove the current time into "cinfo"
+ * but it will not actually get signed until the entire item is
+ * processed for encoding.  Is this (expected to be small) delay okay?
+ *
+ * "cinfo" should be of type signedData (the only kind of pkcs7 data
+ * that is allowed authenticated attributes); SECFailure will be returned
+ * if it is not.
+ */
+SECStatus
+SEC_PKCS7AddSigningTime(SEC_PKCS7ContentInfo *cinfo)
+{
+    SEC_PKCS7SignerInfo **signerinfos;
+    SEC_PKCS7Attribute *attr;
+    SECItem stime;
+    SECStatus rv;
+    int si;
+
+    PORT_Assert(SEC_PKCS7ContentType(cinfo) == SEC_OID_PKCS7_SIGNED_DATA);
+    if (SEC_PKCS7ContentType(cinfo) != SEC_OID_PKCS7_SIGNED_DATA)
+        return SECFailure;
+
+    signerinfos = cinfo->content.signedData->signerInfos;
+
+    /* There has to be a signer, or it makes no sense. */
+    if (signerinfos == NULL || signerinfos[0] == NULL)
+        return SECFailure;
+
+    rv = DER_EncodeTimeChoice(NULL, &stime, PR_Now());
+    if (rv != SECSuccess)
+        return rv;
+
+    attr = sec_pkcs7_create_attribute(cinfo->poolp,
+                                      SEC_OID_PKCS9_SIGNING_TIME,
+                                      &stime, PR_FALSE);
+    SECITEM_FreeItem(&stime, PR_FALSE);
+
+    if (attr == NULL)
+        return SECFailure;
+
+    rv = SECSuccess;
+    for (si = 0; signerinfos[si] != NULL; si++) {
+        SEC_PKCS7Attribute *oattr;
+
+        oattr = sec_PKCS7FindAttribute(signerinfos[si]->authAttr,
+                                       SEC_OID_PKCS9_SIGNING_TIME, PR_FALSE);
+        PORT_Assert(oattr == NULL);
+        if (oattr != NULL)
+            continue; /* XXX or would it be better to replace it? */
+
+        rv = sec_pkcs7_add_attribute(cinfo, &(signerinfos[si]->authAttr),
+                                     attr);
+        if (rv != SECSuccess)
+            break; /* could try to continue, but may as well give up now */
+    }
+
+    return rv;
+}
+
+/*
+ * Add the specified attribute to the authenticated (i.e. signed) attributes
+ * of "cinfo" -- "oidtag" describes the attribute and "value" is the
+ * value to be associated with it.  NOTE! "value" must already be encoded;
+ * no interpretation of "oidtag" is done.  Also, it is assumed that this
+ * signedData has only one signer -- if we ever need to add attributes
+ * when there is more than one signature, we need a way to specify *which*
+ * signature should get the attribute.
+ *
+ * XXX Technically, a signed attribute can have multiple values; if/when
+ * we ever need to support an attribute which takes multiple values, we
+ * either need to change this interface or create an AddSignedAttributeValue
+ * which can be called subsequently, and would then append a value.
+ *
+ * "cinfo" should be of type signedData (the only kind of pkcs7 data
+ * that is allowed authenticated attributes); SECFailure will be returned
+ * if it is not.
+ */
+SECStatus
+SEC_PKCS7AddSignedAttribute(SEC_PKCS7ContentInfo *cinfo,
+                            SECOidTag oidtag,
+                            SECItem *value)
+{
+    SEC_PKCS7SignerInfo **signerinfos;
+    SEC_PKCS7Attribute *attr;
+
+    PORT_Assert(SEC_PKCS7ContentType(cinfo) == SEC_OID_PKCS7_SIGNED_DATA);
+    if (SEC_PKCS7ContentType(cinfo) != SEC_OID_PKCS7_SIGNED_DATA)
+        return SECFailure;
+
+    signerinfos = cinfo->content.signedData->signerInfos;
+
+    /*
+     * No signature or more than one means no deal.
+     */
+    if (signerinfos == NULL || signerinfos[0] == NULL || signerinfos[1] != NULL)
+        return SECFailure;
+
+    attr = sec_pkcs7_create_attribute(cinfo->poolp, oidtag, value, PR_TRUE);
+    if (attr == NULL)
+        return SECFailure;
+
+    return sec_pkcs7_add_attribute(cinfo, &(signerinfos[0]->authAttr), attr);
+}
+
+/*
+ * Mark that the signer certificates and their issuing chain should
+ * be included in the encoded data.  This is expected to be used
+ * in outgoing signed messages for email (S/MIME).
+ *
+ * "certdb" is the cert database to use for finding the chain.
+ * It can be NULL, meaning use the default database.
+ *
+ * "cinfo" should be of type signedData or signedAndEnvelopedData;
+ * SECFailure will be returned if it is not.
+ */
+SECStatus
+SEC_PKCS7IncludeCertChain(SEC_PKCS7ContentInfo *cinfo,
+                          CERTCertDBHandle *certdb)
+{
+    SECOidTag kind;
+    SEC_PKCS7SignerInfo *signerinfo, **signerinfos;
+
+    kind = SEC_PKCS7ContentType(cinfo);
+    switch (kind) {
+        case SEC_OID_PKCS7_SIGNED_DATA:
+            signerinfos = cinfo->content.signedData->signerInfos;
+            break;
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA:
+            signerinfos = cinfo->content.signedAndEnvelopedData->signerInfos;
+            break;
+        default:
+            return SECFailure; /* XXX set an error? */
+    }
+
+    if (signerinfos == NULL) /* no signer, no certs? */
+        return SECFailure;   /* XXX set an error? */
+
+    if (certdb == NULL) {
+        certdb = CERT_GetDefaultCertDB();
+        if (certdb == NULL) {
+            PORT_SetError(SEC_ERROR_BAD_DATABASE);
+            return SECFailure;
+        }
+    }
+
+    /* XXX Should it be an error if we find no signerinfo or no certs? */
+    while ((signerinfo = *signerinfos++) != NULL) {
+        if (signerinfo->cert != NULL)
+            /* get the cert chain.  don't send the root to avoid contamination
+	     * of old clients with a new root that they don't trust
+	     */
+            signerinfo->certList = CERT_CertChainFromCert(signerinfo->cert,
+                                                          certUsageEmailSigner,
+                                                          PR_FALSE);
+    }
+
+    return SECSuccess;
+}
+
+/*
+ * Helper function to add a certificate chain for inclusion in the
+ * bag of certificates in a signedData.
+ */
+static SECStatus
+sec_pkcs7_add_cert_chain(SEC_PKCS7ContentInfo *cinfo,
+                         CERTCertificate *cert,
+                         CERTCertDBHandle *certdb)
+{
+    SECOidTag kind;
+    CERTCertificateList *certlist, **certlists, ***certlistsp;
+    int count;
+
+    kind = SEC_PKCS7ContentType(cinfo);
+    switch (kind) {
+        case SEC_OID_PKCS7_SIGNED_DATA: {
+            SEC_PKCS7SignedData *sdp;
+
+            sdp = cinfo->content.signedData;
+            certlistsp = &(sdp->certLists);
+        } break;
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA: {
+            SEC_PKCS7SignedAndEnvelopedData *saedp;
+
+            saedp = cinfo->content.signedAndEnvelopedData;
+            certlistsp = &(saedp->certLists);
+        } break;
+        default:
+            return SECFailure; /* XXX set an error? */
+    }
+
+    if (certdb == NULL) {
+        certdb = CERT_GetDefaultCertDB();
+        if (certdb == NULL) {
+            PORT_SetError(SEC_ERROR_BAD_DATABASE);
+            return SECFailure;
+        }
+    }
+
+    certlist = CERT_CertChainFromCert(cert, certUsageEmailSigner, PR_FALSE);
+    if (certlist == NULL)
+        return SECFailure;
+
+    certlists = *certlistsp;
+    if (certlists == NULL) {
+        count = 0;
+        certlists = (CERTCertificateList **)PORT_ArenaAlloc(cinfo->poolp,
+                                                            2 * sizeof(CERTCertificateList *));
+    } else {
+        for (count = 0; certlists[count] != NULL; count++)
+            ;
+        PORT_Assert(count); /* should be at least one already */
+        certlists = (CERTCertificateList **)PORT_ArenaGrow(cinfo->poolp,
+                                                           certlists,
+                                                           (count + 1) * sizeof(CERTCertificateList *),
+                                                           (count + 2) * sizeof(CERTCertificateList *));
+    }
+
+    if (certlists == NULL) {
+        CERT_DestroyCertificateList(certlist);
+        return SECFailure;
+    }
+
+    certlists[count] = certlist;
+    certlists[count + 1] = NULL;
+
+    *certlistsp = certlists;
+
+    return SECSuccess;
+}
+
+/*
+ * Helper function to add a certificate for inclusion in the bag of
+ * certificates in a signedData.
+ */
+static SECStatus
+sec_pkcs7_add_certificate(SEC_PKCS7ContentInfo *cinfo,
+                          CERTCertificate *cert)
+{
+    SECOidTag kind;
+    CERTCertificate **certs, ***certsp;
+    int count;
+
+    kind = SEC_PKCS7ContentType(cinfo);
+    switch (kind) {
+        case SEC_OID_PKCS7_SIGNED_DATA: {
+            SEC_PKCS7SignedData *sdp;
+
+            sdp = cinfo->content.signedData;
+            certsp = &(sdp->certs);
+        } break;
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA: {
+            SEC_PKCS7SignedAndEnvelopedData *saedp;
+
+            saedp = cinfo->content.signedAndEnvelopedData;
+            certsp = &(saedp->certs);
+        } break;
+        default:
+            return SECFailure; /* XXX set an error? */
+    }
+
+    cert = CERT_DupCertificate(cert);
+    if (cert == NULL)
+        return SECFailure;
+
+    certs = *certsp;
+    if (certs == NULL) {
+        count = 0;
+        certs = (CERTCertificate **)PORT_ArenaAlloc(cinfo->poolp,
+                                                    2 * sizeof(CERTCertificate *));
+    } else {
+        for (count = 0; certs[count] != NULL; count++)
+            ;
+        PORT_Assert(count); /* should be at least one already */
+        certs = (CERTCertificate **)PORT_ArenaGrow(cinfo->poolp, certs,
+                                                   (count + 1) * sizeof(CERTCertificate *),
+                                                   (count + 2) * sizeof(CERTCertificate *));
+    }
+
+    if (certs == NULL) {
+        CERT_DestroyCertificate(cert);
+        return SECFailure;
+    }
+
+    certs[count] = cert;
+    certs[count + 1] = NULL;
+
+    *certsp = certs;
+
+    return SECSuccess;
+}
+
+/*
+ * Create a PKCS7 certs-only container.
+ *
+ * "cert" is the (first) cert that will be included.
+ *
+ * "include_chain" specifies whether the entire chain for "cert" should
+ * be included.
+ *
+ * "certdb" is the cert database to use for finding the chain.
+ * It can be NULL in when "include_chain" is false, or when meaning
+ * use the default database.
+ *
+ * More certs and chains can be added via AddCertificate and AddCertChain.
+ *
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+SEC_PKCS7ContentInfo *
+SEC_PKCS7CreateCertsOnly(CERTCertificate *cert,
+                         PRBool include_chain,
+                         CERTCertDBHandle *certdb)
+{
+    SEC_PKCS7ContentInfo *cinfo;
+    SECStatus rv;
+
+    cinfo = sec_pkcs7_create_signed_data(NULL, NULL);
+    if (cinfo == NULL)
+        return NULL;
+
+    if (include_chain)
+        rv = sec_pkcs7_add_cert_chain(cinfo, cert, certdb);
+    else
+        rv = sec_pkcs7_add_certificate(cinfo, cert);
+
+    if (rv != SECSuccess) {
+        SEC_PKCS7DestroyContentInfo(cinfo);
+        return NULL;
+    }
+
+    return cinfo;
+}
+
+/*
+ * Add "cert" and its entire chain to the set of certs included in "cinfo".
+ *
+ * "certdb" is the cert database to use for finding the chain.
+ * It can be NULL, meaning use the default database.
+ *
+ * "cinfo" should be of type signedData or signedAndEnvelopedData;
+ * SECFailure will be returned if it is not.
+ */
+SECStatus
+SEC_PKCS7AddCertChain(SEC_PKCS7ContentInfo *cinfo,
+                      CERTCertificate *cert,
+                      CERTCertDBHandle *certdb)
+{
+    SECOidTag kind;
+
+    kind = SEC_PKCS7ContentType(cinfo);
+    if (kind != SEC_OID_PKCS7_SIGNED_DATA && kind != SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA)
+        return SECFailure; /* XXX set an error? */
+
+    return sec_pkcs7_add_cert_chain(cinfo, cert, certdb);
+}
+
+/*
+ * Add "cert" to the set of certs included in "cinfo".
+ *
+ * "cinfo" should be of type signedData or signedAndEnvelopedData;
+ * SECFailure will be returned if it is not.
+ */
+SECStatus
+SEC_PKCS7AddCertificate(SEC_PKCS7ContentInfo *cinfo, CERTCertificate *cert)
+{
+    SECOidTag kind;
+
+    kind = SEC_PKCS7ContentType(cinfo);
+    if (kind != SEC_OID_PKCS7_SIGNED_DATA && kind != SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA)
+        return SECFailure; /* XXX set an error? */
+
+    return sec_pkcs7_add_certificate(cinfo, cert);
+}
+
+static SECStatus
+sec_pkcs7_init_encrypted_content_info(SEC_PKCS7EncryptedContentInfo *enccinfo,
+                                      PLArenaPool *poolp,
+                                      SECOidTag kind, PRBool detached,
+                                      SECOidTag encalg, int keysize)
+{
+    SECStatus rv;
+
+    PORT_Assert(enccinfo != NULL && poolp != NULL);
+    if (enccinfo == NULL || poolp == NULL)
+        return SECFailure;
+
+    /*
+     * XXX Some day we may want to allow for other kinds.  That needs
+     * more work and modifications to the creation interface, etc.
+     * For now, allow but notice callers who pass in other kinds.
+     * They are responsible for creating the inner type and encoding,
+     * if it is other than DATA.
+     */
+    PORT_Assert(kind == SEC_OID_PKCS7_DATA);
+
+    enccinfo->contentTypeTag = SECOID_FindOIDByTag(kind);
+    PORT_Assert(enccinfo->contentTypeTag && enccinfo->contentTypeTag->offset == kind);
+
+    rv = SECITEM_CopyItem(poolp, &(enccinfo->contentType),
+                          &(enccinfo->contentTypeTag->oid));
+    if (rv != SECSuccess)
+        return rv;
+
+    /* Save keysize and algorithm for later. */
+    enccinfo->keysize = keysize;
+    enccinfo->encalg = encalg;
+
+    return SECSuccess;
+}
+
+/*
+ * Add a recipient to a PKCS7 thing, verifying their cert first.
+ * Any error returns SECFailure.
+ */
+static SECStatus
+sec_pkcs7_add_recipient(SEC_PKCS7ContentInfo *cinfo,
+                        CERTCertificate *cert,
+                        SECCertUsage certusage,
+                        CERTCertDBHandle *certdb)
+{
+    SECOidTag kind;
+    SEC_PKCS7RecipientInfo *recipientinfo, **recipientinfos, ***recipientinfosp;
+    SECItem *dummy;
+    void *mark;
+    int count;
+
+    kind = SEC_PKCS7ContentType(cinfo);
+    switch (kind) {
+        case SEC_OID_PKCS7_ENVELOPED_DATA: {
+            SEC_PKCS7EnvelopedData *edp;
+
+            edp = cinfo->content.envelopedData;
+            recipientinfosp = &(edp->recipientInfos);
+        } break;
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA: {
+            SEC_PKCS7SignedAndEnvelopedData *saedp;
+
+            saedp = cinfo->content.signedAndEnvelopedData;
+            recipientinfosp = &(saedp->recipientInfos);
+        } break;
+        default:
+            return SECFailure; /* XXX set an error? */
+    }
+
+    /*
+     * XXX I think that CERT_VerifyCert should do this if *it* is passed
+     * a NULL database.
+     */
+    if (certdb == NULL) {
+        certdb = CERT_GetDefaultCertDB();
+        if (certdb == NULL)
+            return SECFailure; /* XXX set an error? */
+    }
+
+    if (CERT_VerifyCert(certdb, cert, PR_TRUE, certusage, PR_Now(),
+                        cinfo->pwfn_arg, NULL) != SECSuccess) {
+        /* XXX Did CERT_VerifyCert set an error? */
+        return SECFailure;
+    }
+
+    mark = PORT_ArenaMark(cinfo->poolp);
+
+    recipientinfo = (SEC_PKCS7RecipientInfo *)PORT_ArenaZAlloc(cinfo->poolp,
+                                                               sizeof(SEC_PKCS7RecipientInfo));
+    if (recipientinfo == NULL) {
+        PORT_ArenaRelease(cinfo->poolp, mark);
+        return SECFailure;
+    }
+
+    dummy = SEC_ASN1EncodeInteger(cinfo->poolp, &recipientinfo->version,
+                                  SEC_PKCS7_RECIPIENT_INFO_VERSION);
+    if (dummy == NULL) {
+        PORT_ArenaRelease(cinfo->poolp, mark);
+        return SECFailure;
+    }
+    PORT_Assert(dummy == &recipientinfo->version);
+
+    recipientinfo->cert = CERT_DupCertificate(cert);
+    if (recipientinfo->cert == NULL) {
+        PORT_ArenaRelease(cinfo->poolp, mark);
+        return SECFailure;
+    }
+
+    recipientinfo->issuerAndSN = CERT_GetCertIssuerAndSN(cinfo->poolp, cert);
+    if (recipientinfo->issuerAndSN == NULL) {
+        PORT_ArenaRelease(cinfo->poolp, mark);
+        return SECFailure;
+    }
+
+    /*
+     * Okay, now recipientinfo is all set.  We just need to put it into
+     * the main structure.
+     *
+     * If this is the first recipient, allocate a new recipientinfos array;
+     * otherwise, reallocate the array, making room for the new entry.
+     */
+    recipientinfos = *recipientinfosp;
+    if (recipientinfos == NULL) {
+        count = 0;
+        recipientinfos = (SEC_PKCS7RecipientInfo **)PORT_ArenaAlloc(
+            cinfo->poolp,
+            2 * sizeof(SEC_PKCS7RecipientInfo *));
+    } else {
+        for (count = 0; recipientinfos[count] != NULL; count++)
+            ;
+        PORT_Assert(count); /* should be at least one already */
+        recipientinfos = (SEC_PKCS7RecipientInfo **)PORT_ArenaGrow(
+            cinfo->poolp, recipientinfos,
+            (count + 1) * sizeof(SEC_PKCS7RecipientInfo *),
+            (count + 2) * sizeof(SEC_PKCS7RecipientInfo *));
+    }
+
+    if (recipientinfos == NULL) {
+        PORT_ArenaRelease(cinfo->poolp, mark);
+        return SECFailure;
+    }
+
+    recipientinfos[count] = recipientinfo;
+    recipientinfos[count + 1] = NULL;
+
+    *recipientinfosp = recipientinfos;
+
+    PORT_ArenaUnmark(cinfo->poolp, mark);
+    return SECSuccess;
+}
+
+/*
+ * Start a PKCS7 enveloping context.
+ *
+ * "cert" is the cert for the recipient.  It will be checked for validity.
+ *
+ * "certusage" describes the encryption usage (e.g. certUsageEmailRecipient)
+ * XXX Maybe SECCertUsage should be split so that our caller just says
+ * "email" and *we* add the "recipient" part -- otherwise our caller
+ * could be lying about the usage; we do not want to allow encryption
+ * certs for signing or vice versa.
+ *
+ * "certdb" is the cert database to use for verifying the cert.
+ * It can be NULL if a default database is available (like in the client).
+ *
+ * "encalg" specifies the bulk encryption algorithm to use (e.g. SEC_OID_RC2).
+ *
+ * "keysize" specifies the bulk encryption key size, in bits.
+ *
+ * The return value can be passed to functions which add things to
+ * it like more recipients, then eventually to SEC_PKCS7Encode() or to
+ * SEC_PKCS7EncoderStart() to create the encoded data, and finally to
+ * SEC_PKCS7DestroyContentInfo().
+ *
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+extern SEC_PKCS7ContentInfo *
+SEC_PKCS7CreateEnvelopedData(CERTCertificate *cert,
+                             SECCertUsage certusage,
+                             CERTCertDBHandle *certdb,
+                             SECOidTag encalg,
+                             int keysize,
+                             SECKEYGetPasswordKey pwfn, void *pwfn_arg)
+{
+    SEC_PKCS7ContentInfo *cinfo;
+    SEC_PKCS7EnvelopedData *envd;
+    SECStatus rv;
+
+    cinfo = sec_pkcs7_create_content_info(SEC_OID_PKCS7_ENVELOPED_DATA,
+                                          PR_FALSE, pwfn, pwfn_arg);
+    if (cinfo == NULL)
+        return NULL;
+
+    rv = sec_pkcs7_add_recipient(cinfo, cert, certusage, certdb);
+    if (rv != SECSuccess) {
+        SEC_PKCS7DestroyContentInfo(cinfo);
+        return NULL;
+    }
+
+    envd = cinfo->content.envelopedData;
+    PORT_Assert(envd != NULL);
+
+    /*
+     * XXX Might we want to allow content types other than data?
+     * If so, via what interface?
+     */
+    rv = sec_pkcs7_init_encrypted_content_info(&(envd->encContentInfo),
+                                               cinfo->poolp,
+                                               SEC_OID_PKCS7_DATA, PR_FALSE,
+                                               encalg, keysize);
+    if (rv != SECSuccess) {
+        SEC_PKCS7DestroyContentInfo(cinfo);
+        return NULL;
+    }
+
+    /* XXX Anything more to do here? */
+
+    return cinfo;
+}
+
+/*
+ * Add another recipient to an encrypted message.
+ *
+ * "cinfo" should be of type envelopedData or signedAndEnvelopedData;
+ * SECFailure will be returned if it is not.
+ *
+ * "cert" is the cert for the recipient.  It will be checked for validity.
+ *
+ * "certusage" describes the encryption usage (e.g. certUsageEmailRecipient)
+ * XXX Maybe SECCertUsage should be split so that our caller just says
+ * "email" and *we* add the "recipient" part -- otherwise our caller
+ * could be lying about the usage; we do not want to allow encryption
+ * certs for signing or vice versa.
+ *
+ * "certdb" is the cert database to use for verifying the cert.
+ * It can be NULL if a default database is available (like in the client).
+ */
+SECStatus
+SEC_PKCS7AddRecipient(SEC_PKCS7ContentInfo *cinfo,
+                      CERTCertificate *cert,
+                      SECCertUsage certusage,
+                      CERTCertDBHandle *certdb)
+{
+    return sec_pkcs7_add_recipient(cinfo, cert, certusage, certdb);
+}
+
+/*
+ * Create an empty PKCS7 data content info.
+ *
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+SEC_PKCS7ContentInfo *
+SEC_PKCS7CreateData(void)
+{
+    return sec_pkcs7_create_content_info(SEC_OID_PKCS7_DATA, PR_FALSE,
+                                         NULL, NULL);
+}
+
+/*
+ * Create an empty PKCS7 encrypted content info.
+ *
+ * "algorithm" specifies the bulk encryption algorithm to use.
+ * 
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+SEC_PKCS7ContentInfo *
+SEC_PKCS7CreateEncryptedData(SECOidTag algorithm, int keysize,
+                             SECKEYGetPasswordKey pwfn, void *pwfn_arg)
+{
+    SEC_PKCS7ContentInfo *cinfo;
+    SECAlgorithmID *algid;
+    SEC_PKCS7EncryptedData *enc_data;
+    SECStatus rv;
+
+    cinfo = sec_pkcs7_create_content_info(SEC_OID_PKCS7_ENCRYPTED_DATA,
+                                          PR_FALSE, pwfn, pwfn_arg);
+    if (cinfo == NULL)
+        return NULL;
+
+    enc_data = cinfo->content.encryptedData;
+    algid = &(enc_data->encContentInfo.contentEncAlg);
+
+    if (!SEC_PKCS5IsAlgorithmPBEAlgTag(algorithm)) {
+        rv = SECOID_SetAlgorithmID(cinfo->poolp, algid, algorithm, NULL);
+    } else {
+        /* Assume password-based-encryption.  
+         * Note: we can't generate pkcs5v2 from this interface.
+         * PK11_CreateBPEAlgorithmID generates pkcs5v2 by accepting
+         * non-PBE oids and assuming that they are pkcs5v2 oids, but
+         * NSS_CMSEncryptedData_Create accepts non-PBE oids as regular
+         * CMS encrypted data, so we can't tell SEC_PKCS7CreateEncryptedtedData
+         * to create pkcs5v2 PBEs */
+        SECAlgorithmID *pbe_algid;
+        pbe_algid = PK11_CreatePBEAlgorithmID(algorithm,
+                                              NSS_PBE_DEFAULT_ITERATION_COUNT,
+                                              NULL);
+        if (pbe_algid == NULL) {
+            rv = SECFailure;
+        } else {
+            rv = SECOID_CopyAlgorithmID(cinfo->poolp, algid, pbe_algid);
+            SECOID_DestroyAlgorithmID(pbe_algid, PR_TRUE);
+        }
+    }
+
+    if (rv != SECSuccess) {
+        SEC_PKCS7DestroyContentInfo(cinfo);
+        return NULL;
+    }
+
+    rv = sec_pkcs7_init_encrypted_content_info(&(enc_data->encContentInfo),
+                                               cinfo->poolp,
+                                               SEC_OID_PKCS7_DATA, PR_FALSE,
+                                               algorithm, keysize);
+    if (rv != SECSuccess) {
+        SEC_PKCS7DestroyContentInfo(cinfo);
+        return NULL;
+    }
+
+    return cinfo;
+}
+
+SEC_PKCS7ContentInfo *
+SEC_PKCS7CreateEncryptedDataWithPBEV2(SECOidTag pbe_algorithm,
+                                      SECOidTag cipher_algorithm,
+                                      SECOidTag prf_algorithm,
+                                      int keysize,
+                                      SECKEYGetPasswordKey pwfn, void *pwfn_arg)
+{
+    SEC_PKCS7ContentInfo *cinfo;
+    SECAlgorithmID *algid;
+    SEC_PKCS7EncryptedData *enc_data;
+    SECStatus rv;
+
+    PORT_Assert(SEC_PKCS5IsAlgorithmPBEAlgTag(pbe_algorithm));
+
+    cinfo = sec_pkcs7_create_content_info(SEC_OID_PKCS7_ENCRYPTED_DATA,
+                                          PR_FALSE, pwfn, pwfn_arg);
+    if (cinfo == NULL)
+        return NULL;
+
+    enc_data = cinfo->content.encryptedData;
+    algid = &(enc_data->encContentInfo.contentEncAlg);
+
+    SECAlgorithmID *pbe_algid;
+    pbe_algid = PK11_CreatePBEV2AlgorithmID(pbe_algorithm,
+                                            cipher_algorithm,
+                                            prf_algorithm,
+                                            keysize,
+                                            NSS_PBE_DEFAULT_ITERATION_COUNT,
+                                            NULL);
+    if (pbe_algid == NULL) {
+        rv = SECFailure;
+    } else {
+        rv = SECOID_CopyAlgorithmID(cinfo->poolp, algid, pbe_algid);
+        SECOID_DestroyAlgorithmID(pbe_algid, PR_TRUE);
+    }
+
+    if (rv != SECSuccess) {
+        SEC_PKCS7DestroyContentInfo(cinfo);
+        return NULL;
+    }
+
+    rv = sec_pkcs7_init_encrypted_content_info(&(enc_data->encContentInfo),
+                                               cinfo->poolp,
+                                               SEC_OID_PKCS7_DATA, PR_FALSE,
+                                               cipher_algorithm, keysize);
+    if (rv != SECSuccess) {
+        SEC_PKCS7DestroyContentInfo(cinfo);
+        return NULL;
+    }
+
+    return cinfo;
+}
diff --git a/security/nss/lib/pkcs7/p7decode.c b/security/nss/lib/pkcs7/p7decode.c
new file mode 100644
index 0000000000..641d201e5a
--- /dev/null
+++ b/security/nss/lib/pkcs7/p7decode.c
@@ -0,0 +1,1919 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * PKCS7 decoding, verification.
+ */
+
+#include "p7local.h"
+
+#include "cert.h"
+/* XXX do not want to have to include */
+#include "certdb.h" /* certdb.h -- the trust stuff needed by */
+                    /* the add certificate code needs to get */
+                    /* rewritten/abstracted and then this */
+                    /* include should be removed! */
+/*#include "cdbhdl.h" */
+#include "cryptohi.h"
+#include "keyhi.h"
+#include "secasn1.h"
+#include "secitem.h"
+#include "secoid.h"
+#include "pk11func.h"
+#include "prtime.h"
+#include "secerr.h"
+#include "sechash.h" /* for HASH_GetHashObject() */
+#include "secder.h"
+#include "secpkcs5.h"
+
+struct sec_pkcs7_decoder_worker {
+    int depth;
+    int digcnt;
+    void **digcxs;
+    const SECHashObject **digobjs;
+    sec_PKCS7CipherObject *decryptobj;
+    PRBool saw_contents;
+};
+
+struct SEC_PKCS7DecoderContextStr {
+    SEC_ASN1DecoderContext *dcx;
+    SEC_PKCS7ContentInfo *cinfo;
+    SEC_PKCS7DecoderContentCallback cb;
+    void *cb_arg;
+    SECKEYGetPasswordKey pwfn;
+    void *pwfn_arg;
+    struct sec_pkcs7_decoder_worker worker;
+    PLArenaPool *tmp_poolp;
+    int error;
+    SEC_PKCS7GetDecryptKeyCallback dkcb;
+    void *dkcb_arg;
+    SEC_PKCS7DecryptionAllowedCallback decrypt_allowed_cb;
+};
+
+/*
+ * Handle one worker, decrypting and digesting the data as necessary.
+ *
+ * XXX If/when we support nested contents, this probably needs to be
+ * revised somewhat to get passed the content-info (which unfortunately
+ * can be two different types depending on whether it is encrypted or not)
+ * corresponding to the given worker.
+ */
+static void
+sec_pkcs7_decoder_work_data(SEC_PKCS7DecoderContext *p7dcx,
+                            struct sec_pkcs7_decoder_worker *worker,
+                            const unsigned char *data, unsigned long len,
+                            PRBool final)
+{
+    unsigned char *buf = NULL;
+    SECStatus rv;
+    int i;
+
+    /*
+     * We should really have data to process, or we should be trying
+     * to finish/flush the last block.  (This is an overly paranoid
+     * check since all callers are in this file and simple inspection
+     * proves they do it right.  But it could find a bug in future
+     * modifications/development, that is why it is here.)
+     */
+    PORT_Assert((data != NULL && len) || final);
+
+    /*
+     * Decrypt this chunk.
+     *
+     * XXX If we get an error, we do not want to do the digest or callback,
+     * but we want to keep decoding.  Or maybe we want to stop decoding
+     * altogether if there is a callback, because obviously we are not
+     * sending the data back and they want to know that.
+     */
+    if (worker->decryptobj != NULL) {
+        /* XXX the following lengths should all be longs? */
+        unsigned int inlen;  /* length of data being decrypted */
+        unsigned int outlen; /* length of decrypted data */
+        unsigned int buflen; /* length available for decrypted data */
+        SECItem *plain;
+
+        inlen = len;
+        buflen = sec_PKCS7DecryptLength(worker->decryptobj, inlen, final);
+        if (buflen == 0) {
+            if (inlen == 0) /* no input and no output */
+                return;
+            /*
+             * No output is expected, but the input data may be buffered
+             * so we still have to call Decrypt.
+             */
+            rv = sec_PKCS7Decrypt(worker->decryptobj, NULL, NULL, 0,
+                                  data, inlen, final);
+            if (rv != SECSuccess) {
+                p7dcx->error = PORT_GetError();
+                return; /* XXX indicate error? */
+            }
+            return;
+        }
+
+        if (p7dcx->cb != NULL) {
+            buf = (unsigned char *)PORT_Alloc(buflen);
+            plain = NULL;
+        } else {
+            unsigned long oldlen;
+
+            /*
+             * XXX This assumes one level of content only.
+             * See comment above about nested content types.
+             * XXX Also, it should work for signedAndEnvelopedData, too!
+             */
+            plain = &(p7dcx->cinfo->content.envelopedData->encContentInfo.plainContent);
+
+            oldlen = plain->len;
+            if (oldlen == 0) {
+                buf = (unsigned char *)PORT_ArenaAlloc(p7dcx->cinfo->poolp,
+                                                       buflen);
+            } else {
+                buf = (unsigned char *)PORT_ArenaGrow(p7dcx->cinfo->poolp,
+                                                      plain->data,
+                                                      oldlen, oldlen + buflen);
+                if (buf != NULL)
+                    buf += oldlen;
+            }
+            plain->data = buf;
+        }
+        if (buf == NULL) {
+            p7dcx->error = SEC_ERROR_NO_MEMORY;
+            return; /* XXX indicate error? */
+        }
+        rv = sec_PKCS7Decrypt(worker->decryptobj, buf, &outlen, buflen,
+                              data, inlen, final);
+        if (rv != SECSuccess) {
+            p7dcx->error = PORT_GetError();
+            return; /* XXX indicate error? */
+        }
+        if (plain != NULL) {
+            PORT_Assert(final || outlen == buflen);
+            plain->len += outlen;
+        }
+        data = buf;
+        len = outlen;
+    }
+
+    /*
+     * Update the running digests.
+     */
+    if (len) {
+        for (i = 0; i < worker->digcnt; i++) {
+            (*worker->digobjs[i]->update)(worker->digcxs[i], data, len);
+        }
+    }
+
+    /*
+     * Pass back the contents bytes, and free the temporary buffer.
+     */
+    if (p7dcx->cb != NULL) {
+        if (len)
+            (*p7dcx->cb)(p7dcx->cb_arg, (const char *)data, len);
+        if (worker->decryptobj != NULL) {
+            PORT_Assert(buf != NULL);
+            PORT_Free(buf);
+        }
+    }
+}
+
+static void
+sec_pkcs7_decoder_filter(void *arg, const char *data, unsigned long len,
+                         int depth, SEC_ASN1EncodingPart data_kind)
+{
+    SEC_PKCS7DecoderContext *p7dcx;
+    struct sec_pkcs7_decoder_worker *worker;
+
+    /*
+     * Since we do not handle any nested contents, the only bytes we
+     * are really interested in are the actual contents bytes (not
+     * the identifier, length, or end-of-contents bytes).  If we were
+     * handling nested types we would probably need to do something
+     * smarter based on depth and data_kind.
+     */
+    if (data_kind != SEC_ASN1_Contents)
+        return;
+
+    /*
+     * The ASN.1 decoder should not even call us with a length of 0.
+     * Just being paranoid.
+     */
+    PORT_Assert(len);
+    if (len == 0)
+        return;
+
+    p7dcx = (SEC_PKCS7DecoderContext *)arg;
+
+    /*
+     * Handling nested contents would mean that there is a chain
+     * of workers -- one per each level of content.  The following
+     * would start with the first worker and loop over them.
+     */
+    worker = &(p7dcx->worker);
+
+    worker->saw_contents = PR_TRUE;
+
+    sec_pkcs7_decoder_work_data(p7dcx, worker,
+                                (const unsigned char *)data, len, PR_FALSE);
+}
+
+/*
+ * Create digest contexts for each algorithm in "digestalgs".
+ * No algorithms is not an error, we just do not do anything.
+ * An error (like trouble allocating memory), marks the error
+ * in "p7dcx" and returns SECFailure, which means that our caller
+ * should just give up altogether.
+ */
+static SECStatus
+sec_pkcs7_decoder_start_digests(SEC_PKCS7DecoderContext *p7dcx, int depth,
+                                SECAlgorithmID **digestalgs)
+{
+    int i, digcnt;
+
+    if (digestalgs == NULL)
+        return SECSuccess;
+
+    /*
+     * Count the algorithms.
+     */
+    digcnt = 0;
+    while (digestalgs[digcnt] != NULL)
+        digcnt++;
+
+    /*
+     * No algorithms means no work to do.
+     * Just act as if there were no algorithms specified.
+     */
+    if (digcnt == 0)
+        return SECSuccess;
+
+    p7dcx->worker.digcxs = (void **)PORT_ArenaAlloc(p7dcx->tmp_poolp,
+                                                    digcnt * sizeof(void *));
+    p7dcx->worker.digobjs = (const SECHashObject **)PORT_ArenaAlloc(p7dcx->tmp_poolp,
+                                                                    digcnt * sizeof(SECHashObject *));
+    if (p7dcx->worker.digcxs == NULL || p7dcx->worker.digobjs == NULL) {
+        p7dcx->error = SEC_ERROR_NO_MEMORY;
+        return SECFailure;
+    }
+
+    p7dcx->worker.depth = depth;
+    p7dcx->worker.digcnt = 0;
+
+    /*
+     * Create a digest context for each algorithm.
+     */
+    for (i = 0; i < digcnt; i++) {
+        SECAlgorithmID *algid = digestalgs[i];
+        SECOidTag oidTag = SECOID_FindOIDTag(&(algid->algorithm));
+        const SECHashObject *digobj = HASH_GetHashObjectByOidTag(oidTag);
+        void *digcx;
+
+        /*
+         * Skip any algorithm we do not even recognize; obviously,
+         * this could be a problem, but if it is critical then the
+         * result will just be that the signature does not verify.
+         * We do not necessarily want to error out here, because
+         * the particular algorithm may not actually be important,
+         * but we cannot know that until later.
+         */
+        if (digobj == NULL) {
+            p7dcx->worker.digcnt--;
+            continue;
+        }
+
+        digcx = (*digobj->create)();
+        if (digcx != NULL) {
+            (*digobj->begin)(digcx);
+            p7dcx->worker.digobjs[p7dcx->worker.digcnt] = digobj;
+            p7dcx->worker.digcxs[p7dcx->worker.digcnt] = digcx;
+            p7dcx->worker.digcnt++;
+        }
+    }
+
+    if (p7dcx->worker.digcnt != 0)
+        SEC_ASN1DecoderSetFilterProc(p7dcx->dcx,
+                                     sec_pkcs7_decoder_filter,
+                                     p7dcx,
+                                     (PRBool)(p7dcx->cb != NULL));
+    return SECSuccess;
+}
+
+/*
+ * Close out all of the digest contexts, storing the results in "digestsp".
+ */
+static SECStatus
+sec_pkcs7_decoder_finish_digests(SEC_PKCS7DecoderContext *p7dcx,
+                                 PLArenaPool *poolp,
+                                 SECItem ***digestsp)
+{
+    struct sec_pkcs7_decoder_worker *worker;
+    const SECHashObject *digobj;
+    void *digcx;
+    SECItem **digests, *digest;
+    int i;
+    void *mark;
+
+    /*
+     * XXX Handling nested contents would mean that there is a chain
+     * of workers -- one per each level of content.  The following
+     * would want to find the last worker in the chain.
+     */
+    worker = &(p7dcx->worker);
+
+    /*
+     * If no digests, then we have nothing to do.
+     */
+    if (worker->digcnt == 0)
+        return SECSuccess;
+
+    /*
+     * No matter what happens after this, we want to stop filtering.
+     * XXX If we handle nested contents, we only want to stop filtering
+     * if we are finishing off the *last* worker.
+     */
+    SEC_ASN1DecoderClearFilterProc(p7dcx->dcx);
+
+    /*
+     * If we ended up with no contents, just destroy each
+     * digest context -- they are meaningless and potentially
+     * confusing, because their presence would imply some content
+     * was digested.
+     */
+    if (!worker->saw_contents) {
+        for (i = 0; i < worker->digcnt; i++) {
+            digcx = worker->digcxs[i];
+            digobj = worker->digobjs[i];
+            (*digobj->destroy)(digcx, PR_TRUE);
+        }
+        return SECSuccess;
+    }
+
+    mark = PORT_ArenaMark(poolp);
+
+    /*
+     * Close out each digest context, saving digest away.
+     */
+    digests =
+        (SECItem **)PORT_ArenaAlloc(poolp, (worker->digcnt + 1) * sizeof(SECItem *));
+    digest = (SECItem *)PORT_ArenaAlloc(poolp, worker->digcnt * sizeof(SECItem));
+    if (digests == NULL || digest == NULL) {
+        p7dcx->error = PORT_GetError();
+        PORT_ArenaRelease(poolp, mark);
+        return SECFailure;
+    }
+
+    for (i = 0; i < worker->digcnt; i++, digest++) {
+        digcx = worker->digcxs[i];
+        digobj = worker->digobjs[i];
+
+        digest->data = (unsigned char *)PORT_ArenaAlloc(poolp, digobj->length);
+        if (digest->data == NULL) {
+            p7dcx->error = PORT_GetError();
+            PORT_ArenaRelease(poolp, mark);
+            return SECFailure;
+        }
+
+        digest->len = digobj->length;
+        (*digobj->end)(digcx, digest->data, &(digest->len), digest->len);
+        (*digobj->destroy)(digcx, PR_TRUE);
+
+        digests[i] = digest;
+    }
+    digests[i] = NULL;
+    *digestsp = digests;
+
+    PORT_ArenaUnmark(poolp, mark);
+    return SECSuccess;
+}
+
+/*
+ * XXX Need comment explaining following helper function (which is used
+ * by sec_pkcs7_decoder_start_decrypt).
+ */
+
+static PK11SymKey *
+sec_pkcs7_decoder_get_recipient_key(SEC_PKCS7DecoderContext *p7dcx,
+                                    SEC_PKCS7RecipientInfo **recipientinfos,
+                                    SEC_PKCS7EncryptedContentInfo *enccinfo)
+{
+    SEC_PKCS7RecipientInfo *ri;
+    CERTCertificate *cert = NULL;
+    SECKEYPrivateKey *privkey = NULL;
+    PK11SymKey *bulkkey = NULL;
+    SECOidTag keyalgtag, bulkalgtag, encalgtag;
+    PK11SlotInfo *slot = NULL;
+
+    if (recipientinfos == NULL || recipientinfos[0] == NULL) {
+        p7dcx->error = SEC_ERROR_NOT_A_RECIPIENT;
+        goto no_key_found;
+    }
+
+    cert = PK11_FindCertAndKeyByRecipientList(&slot, recipientinfos, &ri,
+                                              &privkey, p7dcx->pwfn_arg);
+    if (cert == NULL) {
+        p7dcx->error = SEC_ERROR_NOT_A_RECIPIENT;
+        goto no_key_found;
+    }
+
+    ri->cert = cert; /* so we can find it later */
+    PORT_Assert(privkey != NULL);
+
+    keyalgtag = SECOID_GetAlgorithmTag(&(cert->subjectPublicKeyInfo.algorithm));
+    encalgtag = SECOID_GetAlgorithmTag(&(ri->keyEncAlg));
+    if (keyalgtag != encalgtag) {
+        p7dcx->error = SEC_ERROR_PKCS7_KEYALG_MISMATCH;
+        goto no_key_found;
+    }
+    bulkalgtag = SECOID_GetAlgorithmTag(&(enccinfo->contentEncAlg));
+
+    switch (encalgtag) {
+        case SEC_OID_PKCS1_RSA_ENCRYPTION:
+            bulkkey = PK11_PubUnwrapSymKey(privkey, &ri->encKey,
+                                           PK11_AlgtagToMechanism(bulkalgtag),
+                                           CKA_DECRYPT, 0);
+            if (bulkkey == NULL) {
+                p7dcx->error = PORT_GetError();
+                PORT_SetError(0);
+                goto no_key_found;
+            }
+            break;
+        default:
+            p7dcx->error = SEC_ERROR_UNSUPPORTED_KEYALG;
+            break;
+    }
+
+no_key_found:
+    if (privkey != NULL)
+        SECKEY_DestroyPrivateKey(privkey);
+    if (slot != NULL)
+        PK11_FreeSlot(slot);
+
+    return bulkkey;
+}
+
+/*
+ * XXX The following comment is old -- the function used to only handle
+ * EnvelopedData or SignedAndEnvelopedData but now handles EncryptedData
+ * as well (and it had all of the code of the helper function above
+ * built into it), though the comment was left as is.  Fix it...
+ *
+ * We are just about to decode the content of an EnvelopedData.
+ * Set up a decryption context so we can decrypt as we go.
+ * Presumably we are one of the recipients listed in "recipientinfos".
+ * (XXX And if we are not, or if we have trouble, what should we do?
+ *  It would be nice to let the decoding still work.  Maybe it should
+ *  be an error if there is a content callback, but not an error otherwise?)
+ * The encryption key and related information can be found in "enccinfo".
+ */
+static SECStatus
+sec_pkcs7_decoder_start_decrypt(SEC_PKCS7DecoderContext *p7dcx, int depth,
+                                SEC_PKCS7RecipientInfo **recipientinfos,
+                                SEC_PKCS7EncryptedContentInfo *enccinfo,
+                                PK11SymKey **copy_key_for_signature)
+{
+    PK11SymKey *bulkkey = NULL;
+    sec_PKCS7CipherObject *decryptobj;
+
+    /*
+     * If a callback is supplied to retrieve the encryption key,
+     * for instance, for Encrypted Content infos, then retrieve
+     * the bulkkey from the callback.  Otherwise, assume that
+     * we are processing Enveloped or SignedAndEnveloped data
+     * content infos.
+     *
+     * XXX Put an assert here?
+     */
+    if (SEC_PKCS7ContentType(p7dcx->cinfo) == SEC_OID_PKCS7_ENCRYPTED_DATA) {
+        if (p7dcx->dkcb != NULL) {
+            bulkkey = (*p7dcx->dkcb)(p7dcx->dkcb_arg,
+                                     &(enccinfo->contentEncAlg));
+        }
+        enccinfo->keysize = 0;
+    } else {
+        bulkkey = sec_pkcs7_decoder_get_recipient_key(p7dcx, recipientinfos,
+                                                      enccinfo);
+        if (bulkkey == NULL)
+            goto no_decryption;
+        enccinfo->keysize = PK11_GetKeyStrength(bulkkey,
+                                                &(enccinfo->contentEncAlg));
+    }
+
+    /*
+     * XXX I think following should set error in p7dcx and clear set error
+     * (as used to be done here, or as is done in get_receipient_key above.
+     */
+    if (bulkkey == NULL) {
+        goto no_decryption;
+    }
+
+    /*
+     * We want to make sure decryption is allowed.  This is done via
+     * a callback specified in SEC_PKCS7DecoderStart().
+     */
+    if (p7dcx->decrypt_allowed_cb) {
+        if ((*p7dcx->decrypt_allowed_cb)(&(enccinfo->contentEncAlg),
+                                         bulkkey) == PR_FALSE) {
+            p7dcx->error = SEC_ERROR_DECRYPTION_DISALLOWED;
+            goto no_decryption;
+        }
+    } else {
+        p7dcx->error = SEC_ERROR_DECRYPTION_DISALLOWED;
+        goto no_decryption;
+    }
+
+    /*
+     * When decrypting a signedAndEnvelopedData, the signature also has
+     * to be decrypted with the bulk encryption key; to avoid having to
+     * get it all over again later (and do another potentially expensive
+     * RSA operation), copy it for later signature verification to use.
+     */
+    if (copy_key_for_signature != NULL)
+        *copy_key_for_signature = PK11_ReferenceSymKey(bulkkey);
+
+    /*
+     * Now we have the bulk encryption key (in bulkkey) and the
+     * the algorithm (in enccinfo->contentEncAlg).  Using those,
+     * create a decryption context.
+     */
+    decryptobj = sec_PKCS7CreateDecryptObject(bulkkey,
+                                              &(enccinfo->contentEncAlg));
+
+    /*
+     * We are done with (this) bulkkey now.
+     */
+    PK11_FreeSymKey(bulkkey);
+
+    if (decryptobj == NULL) {
+        p7dcx->error = PORT_GetError();
+        PORT_SetError(0);
+        goto no_decryption;
+    }
+
+    SEC_ASN1DecoderSetFilterProc(p7dcx->dcx,
+                                 sec_pkcs7_decoder_filter,
+                                 p7dcx,
+                                 (PRBool)(p7dcx->cb != NULL));
+
+    p7dcx->worker.depth = depth;
+    p7dcx->worker.decryptobj = decryptobj;
+
+    return SECSuccess;
+
+no_decryption:
+    PK11_FreeSymKey(bulkkey);
+    /*
+     * For some reason (error set already, if appropriate), we cannot
+     * decrypt the content.  I am not sure what exactly is the right
+     * thing to do here; in some cases we want to just stop, and in
+     * others we want to let the decoding finish even though we cannot
+     * decrypt the content.  My current thinking is that if the caller
+     * set up a content callback, then they are really interested in
+     * getting (decrypted) content, and if they cannot they will want
+     * to know about it.  However, if no callback was specified, then
+     * maybe it is not important that the decryption failed.
+     */
+    if (p7dcx->cb != NULL)
+        return SECFailure;
+    else
+        return SECSuccess; /* Let the decoding continue. */
+}
+
+static SECStatus
+sec_pkcs7_decoder_finish_decrypt(SEC_PKCS7DecoderContext *p7dcx,
+                                 PLArenaPool *poolp,
+                                 SEC_PKCS7EncryptedContentInfo *enccinfo)
+{
+    struct sec_pkcs7_decoder_worker *worker;
+
+    /*
+     * XXX Handling nested contents would mean that there is a chain
+     * of workers -- one per each level of content.  The following
+     * would want to find the last worker in the chain.
+     */
+    worker = &(p7dcx->worker);
+
+    /*
+     * If no decryption context, then we have nothing to do.
+     */
+    if (worker->decryptobj == NULL)
+        return SECSuccess;
+
+    /*
+     * No matter what happens after this, we want to stop filtering.
+     * XXX If we handle nested contents, we only want to stop filtering
+     * if we are finishing off the *last* worker.
+     */
+    SEC_ASN1DecoderClearFilterProc(p7dcx->dcx);
+
+    /*
+     * Handle the last block.
+     */
+    sec_pkcs7_decoder_work_data(p7dcx, worker, NULL, 0, PR_TRUE);
+
+    /*
+     * All done, destroy it.
+     */
+    sec_PKCS7DestroyDecryptObject(worker->decryptobj);
+    worker->decryptobj = NULL;
+
+    return SECSuccess;
+}
+
+static void
+sec_pkcs7_decoder_notify(void *arg, PRBool before, void *dest, int depth)
+{
+    SEC_PKCS7DecoderContext *p7dcx;
+    SEC_PKCS7ContentInfo *cinfo;
+    SEC_PKCS7SignedData *sigd;
+    SEC_PKCS7EnvelopedData *envd;
+    SEC_PKCS7SignedAndEnvelopedData *saed;
+    SEC_PKCS7EncryptedData *encd;
+    SEC_PKCS7DigestedData *digd;
+    PRBool after;
+    SECStatus rv;
+
+    /*
+     * Just to make the code easier to read, create an "after" variable
+     * that is equivalent to "not before".
+     * (This used to be just the statement "after = !before", but that
+     * causes a warning on the mac; to avoid that, we do it the long way.)
+     */
+    if (before)
+        after = PR_FALSE;
+    else
+        after = PR_TRUE;
+
+    p7dcx = (SEC_PKCS7DecoderContext *)arg;
+    if (!p7dcx) {
+        return;
+    }
+
+    cinfo = p7dcx->cinfo;
+
+    if (!cinfo) {
+        return;
+    }
+
+    if (cinfo->contentTypeTag == NULL) {
+        if (after && dest == &(cinfo->contentType))
+            cinfo->contentTypeTag = SECOID_FindOID(&(cinfo->contentType));
+        return;
+    }
+
+    switch (cinfo->contentTypeTag->offset) {
+        case SEC_OID_PKCS7_SIGNED_DATA:
+            sigd = cinfo->content.signedData;
+            if (sigd == NULL)
+                break;
+
+            if (sigd->contentInfo.contentTypeTag == NULL) {
+                if (after && dest == &(sigd->contentInfo.contentType))
+                    sigd->contentInfo.contentTypeTag =
+                        SECOID_FindOID(&(sigd->contentInfo.contentType));
+                break;
+            }
+
+            /*
+             * We only set up a filtering digest if the content is
+             * plain DATA; anything else needs more work because a
+             * second pass is required to produce a DER encoding from
+             * an input that can be BER encoded.  (This is a requirement
+             * of PKCS7 that is unfortunate, but there you have it.)
+             *
+             * XXX Also, since we stop here if this is not DATA, the
+             * inner content is not getting processed at all.  Someday
+             * we may want to fix that.
+             */
+            if (sigd->contentInfo.contentTypeTag->offset != SEC_OID_PKCS7_DATA) {
+                /* XXX Set an error in p7dcx->error */
+                SEC_ASN1DecoderClearNotifyProc(p7dcx->dcx);
+                break;
+            }
+
+            /*
+             * Just before the content, we want to set up a digest context
+             * for each digest algorithm listed, and start a filter which
+             * will run all of the contents bytes through that digest.
+             */
+            if (before && dest == &(sigd->contentInfo.content)) {
+                rv = sec_pkcs7_decoder_start_digests(p7dcx, depth,
+                                                     sigd->digestAlgorithms);
+                if (rv != SECSuccess)
+                    SEC_ASN1DecoderClearNotifyProc(p7dcx->dcx);
+
+                break;
+            }
+
+            /*
+             * XXX To handle nested types, here is where we would want
+             * to check for inner boundaries that need handling.
+             */
+
+            /*
+             * Are we done?
+             */
+            if (after && dest == &(sigd->contentInfo.content)) {
+                /*
+                 * Close out the digest contexts.  We ignore any error
+                 * because we are stopping anyway; the error status left
+                 * behind in p7dcx will be seen by outer functions.
+                 */
+                (void)sec_pkcs7_decoder_finish_digests(p7dcx, cinfo->poolp,
+                                                       &(sigd->digests));
+
+                /*
+                 * XXX To handle nested contents, we would need to remove
+                 * the worker from the chain (and free it).
+                 */
+
+                /*
+                 * Stop notify.
+                 */
+                SEC_ASN1DecoderClearNotifyProc(p7dcx->dcx);
+            }
+            break;
+
+        case SEC_OID_PKCS7_ENVELOPED_DATA:
+            envd = cinfo->content.envelopedData;
+            if (envd == NULL)
+                break;
+
+            if (envd->encContentInfo.contentTypeTag == NULL) {
+                if (after && dest == &(envd->encContentInfo.contentType))
+                    envd->encContentInfo.contentTypeTag =
+                        SECOID_FindOID(&(envd->encContentInfo.contentType));
+                break;
+            }
+
+            /*
+             * Just before the content, we want to set up a decryption
+             * context, and start a filter which will run all of the
+             * contents bytes through it to determine the plain content.
+             */
+            if (before && dest == &(envd->encContentInfo.encContent)) {
+                rv = sec_pkcs7_decoder_start_decrypt(p7dcx, depth,
+                                                     envd->recipientInfos,
+                                                     &(envd->encContentInfo),
+                                                     NULL);
+                if (rv != SECSuccess)
+                    SEC_ASN1DecoderClearNotifyProc(p7dcx->dcx);
+
+                break;
+            }
+
+            /*
+             * Are we done?
+             */
+            if (after && dest == &(envd->encContentInfo.encContent)) {
+                /*
+             * Close out the decryption context.  We ignore any error
+             * because we are stopping anyway; the error status left
+             * behind in p7dcx will be seen by outer functions.
+             */
+                (void)sec_pkcs7_decoder_finish_decrypt(p7dcx, cinfo->poolp,
+                                                       &(envd->encContentInfo));
+
+                /*
+                 * XXX To handle nested contents, we would need to remove
+                 * the worker from the chain (and free it).
+                 */
+
+                /*
+                 * Stop notify.
+                 */
+                SEC_ASN1DecoderClearNotifyProc(p7dcx->dcx);
+            }
+            break;
+
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA:
+            saed = cinfo->content.signedAndEnvelopedData;
+            if (saed == NULL)
+                break;
+
+            if (saed->encContentInfo.contentTypeTag == NULL) {
+                if (after && dest == &(saed->encContentInfo.contentType))
+                    saed->encContentInfo.contentTypeTag =
+                        SECOID_FindOID(&(saed->encContentInfo.contentType));
+                break;
+            }
+
+            /*
+             * Just before the content, we want to set up a decryption
+             * context *and* digest contexts, and start a filter which
+             * will run all of the contents bytes through both.
+             */
+            if (before && dest == &(saed->encContentInfo.encContent)) {
+                rv = sec_pkcs7_decoder_start_decrypt(p7dcx, depth,
+                                                     saed->recipientInfos,
+                                                     &(saed->encContentInfo),
+                                                     &(saed->sigKey));
+                if (rv == SECSuccess)
+                    rv = sec_pkcs7_decoder_start_digests(p7dcx, depth,
+                                                         saed->digestAlgorithms);
+                if (rv != SECSuccess)
+                    SEC_ASN1DecoderClearNotifyProc(p7dcx->dcx);
+
+                break;
+            }
+
+            /*
+             * Are we done?
+             */
+            if (after && dest == &(saed->encContentInfo.encContent)) {
+                /*
+                 * Close out the decryption and digests contexts.
+                 * We ignore any errors because we are stopping anyway;
+                 * the error status left behind in p7dcx will be seen by
+                 * outer functions.
+                 *
+                 * Note that the decrypt stuff must be called first;
+                 * it may have a last buffer to do which in turn has
+                 * to be added to the digest.
+                 */
+                (void)sec_pkcs7_decoder_finish_decrypt(p7dcx, cinfo->poolp,
+                                                       &(saed->encContentInfo));
+                (void)sec_pkcs7_decoder_finish_digests(p7dcx, cinfo->poolp,
+                                                       &(saed->digests));
+
+                /*
+                 * XXX To handle nested contents, we would need to remove
+                 * the worker from the chain (and free it).
+                 */
+
+                /*
+                 * Stop notify.
+                 */
+                SEC_ASN1DecoderClearNotifyProc(p7dcx->dcx);
+            }
+            break;
+
+        case SEC_OID_PKCS7_DIGESTED_DATA:
+            digd = cinfo->content.digestedData;
+
+            /*
+             * XXX Want to do the digest or not?  Maybe future enhancement...
+             */
+            if (before && dest == &(digd->contentInfo.content.data)) {
+                SEC_ASN1DecoderSetFilterProc(p7dcx->dcx, sec_pkcs7_decoder_filter,
+                                             p7dcx,
+                                             (PRBool)(p7dcx->cb != NULL));
+                break;
+            }
+
+            /*
+             * Are we done?
+             */
+            if (after && dest == &(digd->contentInfo.content.data)) {
+                SEC_ASN1DecoderClearFilterProc(p7dcx->dcx);
+            }
+            break;
+
+        case SEC_OID_PKCS7_ENCRYPTED_DATA:
+            encd = cinfo->content.encryptedData;
+
+            if (!encd) {
+                break;
+            }
+
+            /*
+             * XXX If the decryption key callback is set, we want to start
+             * the decryption.  If the callback is not set, we will treat the
+             * content as plain data, since we do not have the key.
+             *
+             * Is this the proper thing to do?
+             */
+            if (before && dest == &(encd->encContentInfo.encContent)) {
+                /*
+                 * Start the encryption process if the decryption key callback
+                 * is present.  Otherwise, treat the content like plain data.
+                 */
+                rv = SECSuccess;
+                if (p7dcx->dkcb != NULL) {
+                    rv = sec_pkcs7_decoder_start_decrypt(p7dcx, depth, NULL,
+                                                         &(encd->encContentInfo),
+                                                         NULL);
+                }
+
+                if (rv != SECSuccess)
+                    SEC_ASN1DecoderClearNotifyProc(p7dcx->dcx);
+
+                break;
+            }
+
+            /*
+             * Are we done?
+             */
+            if (after && dest == &(encd->encContentInfo.encContent)) {
+                /*
+                 * Close out the decryption context.  We ignore any error
+                 * because we are stopping anyway; the error status left
+                 * behind in p7dcx will be seen by outer functions.
+                 */
+                (void)sec_pkcs7_decoder_finish_decrypt(p7dcx, cinfo->poolp,
+                                                       &(encd->encContentInfo));
+
+                /*
+                 * Stop notify.
+                 */
+                SEC_ASN1DecoderClearNotifyProc(p7dcx->dcx);
+            }
+            break;
+
+        case SEC_OID_PKCS7_DATA:
+            /*
+             * If a output callback has been specified, we want to set the filter
+             * to call the callback.  This is taken care of in
+             * sec_pkcs7_decoder_start_decrypt() or
+             * sec_pkcs7_decoder_start_digests() for the other content types.
+             */
+
+            if (before && dest == &(cinfo->content.data)) {
+
+                /*
+                 * Set the filter proc up.
+                 */
+                SEC_ASN1DecoderSetFilterProc(p7dcx->dcx,
+                                             sec_pkcs7_decoder_filter,
+                                             p7dcx,
+                                             (PRBool)(p7dcx->cb != NULL));
+                break;
+            }
+
+            if (after && dest == &(cinfo->content.data)) {
+                /*
+                 * Time to clean up after ourself, stop the Notify and Filter
+                 * procedures.
+                 */
+                SEC_ASN1DecoderClearNotifyProc(p7dcx->dcx);
+                SEC_ASN1DecoderClearFilterProc(p7dcx->dcx);
+            }
+            break;
+
+        default:
+            SEC_ASN1DecoderClearNotifyProc(p7dcx->dcx);
+            break;
+    }
+}
+
+SEC_PKCS7DecoderContext *
+SEC_PKCS7DecoderStart(SEC_PKCS7DecoderContentCallback cb, void *cb_arg,
+                      SECKEYGetPasswordKey pwfn, void *pwfn_arg,
+                      SEC_PKCS7GetDecryptKeyCallback decrypt_key_cb,
+                      void *decrypt_key_cb_arg,
+                      SEC_PKCS7DecryptionAllowedCallback decrypt_allowed_cb)
+{
+    SEC_PKCS7DecoderContext *p7dcx;
+    SEC_ASN1DecoderContext *dcx;
+    SEC_PKCS7ContentInfo *cinfo;
+    PLArenaPool *poolp;
+
+    poolp = PORT_NewArena(1024); /* XXX what is right value? */
+    if (poolp == NULL)
+        return NULL;
+
+    cinfo = (SEC_PKCS7ContentInfo *)PORT_ArenaZAlloc(poolp, sizeof(*cinfo));
+    if (cinfo == NULL) {
+        PORT_FreeArena(poolp, PR_FALSE);
+        return NULL;
+    }
+
+    cinfo->poolp = poolp;
+    cinfo->pwfn = pwfn;
+    cinfo->pwfn_arg = pwfn_arg;
+    cinfo->created = PR_FALSE;
+    cinfo->refCount = 1;
+
+    p7dcx =
+        (SEC_PKCS7DecoderContext *)PORT_ZAlloc(sizeof(SEC_PKCS7DecoderContext));
+    if (p7dcx == NULL) {
+        PORT_FreeArena(poolp, PR_FALSE);
+        return NULL;
+    }
+
+    p7dcx->tmp_poolp = PORT_NewArena(1024); /* XXX what is right value? */
+    if (p7dcx->tmp_poolp == NULL) {
+        PORT_Free(p7dcx);
+        PORT_FreeArena(poolp, PR_FALSE);
+        return NULL;
+    }
+
+    dcx = SEC_ASN1DecoderStart(poolp, cinfo, sec_PKCS7ContentInfoTemplate);
+    if (dcx == NULL) {
+        PORT_FreeArena(p7dcx->tmp_poolp, PR_FALSE);
+        PORT_Free(p7dcx);
+        PORT_FreeArena(poolp, PR_FALSE);
+        return NULL;
+    }
+
+    SEC_ASN1DecoderSetNotifyProc(dcx, sec_pkcs7_decoder_notify, p7dcx);
+
+    p7dcx->dcx = dcx;
+    p7dcx->cinfo = cinfo;
+    p7dcx->cb = cb;
+    p7dcx->cb_arg = cb_arg;
+    p7dcx->pwfn = pwfn;
+    p7dcx->pwfn_arg = pwfn_arg;
+    p7dcx->dkcb = decrypt_key_cb;
+    p7dcx->dkcb_arg = decrypt_key_cb_arg;
+    p7dcx->decrypt_allowed_cb = decrypt_allowed_cb;
+
+    return p7dcx;
+}
+
+/*
+ * Do the next chunk of PKCS7 decoding.  If there is a problem, set
+ * an error and return a failure status.  Note that in the case of
+ * an error, this routine is still prepared to be called again and
+ * again in case that is the easiest route for our caller to take.
+ * We simply detect it and do not do anything except keep setting
+ * that error in case our caller has not noticed it yet...
+ */
+SECStatus
+SEC_PKCS7DecoderUpdate(SEC_PKCS7DecoderContext *p7dcx,
+                       const char *buf, unsigned long len)
+{
+    if (!p7dcx) {
+        PORT_SetError(SEC_ERROR_INVALID_ARGS);
+        return SECFailure;
+    }
+
+    if (p7dcx->cinfo != NULL && p7dcx->dcx != NULL) {
+        PORT_Assert(p7dcx->error == 0);
+        if (p7dcx->error == 0) {
+            if (SEC_ASN1DecoderUpdate(p7dcx->dcx, buf, len) != SECSuccess) {
+                p7dcx->error = PORT_GetError();
+                PORT_Assert(p7dcx->error);
+                if (p7dcx->error == 0)
+                    p7dcx->error = -1;
+            }
+        }
+    }
+
+    if (p7dcx->error) {
+        if (p7dcx->dcx != NULL) {
+            (void)SEC_ASN1DecoderFinish(p7dcx->dcx);
+            p7dcx->dcx = NULL;
+        }
+        if (p7dcx->cinfo != NULL) {
+            SEC_PKCS7DestroyContentInfo(p7dcx->cinfo);
+            p7dcx->cinfo = NULL;
+        }
+        PORT_SetError(p7dcx->error);
+        return SECFailure;
+    }
+
+    return SECSuccess;
+}
+
+SEC_PKCS7ContentInfo *
+SEC_PKCS7DecoderFinish(SEC_PKCS7DecoderContext *p7dcx)
+{
+    SEC_PKCS7ContentInfo *cinfo;
+
+    cinfo = p7dcx->cinfo;
+    if (p7dcx->dcx != NULL) {
+        if (SEC_ASN1DecoderFinish(p7dcx->dcx) != SECSuccess) {
+            SEC_PKCS7DestroyContentInfo(cinfo);
+            cinfo = NULL;
+        }
+    }
+    /* free any NSS data structures */
+    if (p7dcx->worker.decryptobj) {
+        sec_PKCS7DestroyDecryptObject(p7dcx->worker.decryptobj);
+    }
+    PORT_FreeArena(p7dcx->tmp_poolp, PR_FALSE);
+    PORT_Free(p7dcx);
+    return cinfo;
+}
+
+SEC_PKCS7ContentInfo *
+SEC_PKCS7DecodeItem(SECItem *p7item,
+                    SEC_PKCS7DecoderContentCallback cb, void *cb_arg,
+                    SECKEYGetPasswordKey pwfn, void *pwfn_arg,
+                    SEC_PKCS7GetDecryptKeyCallback decrypt_key_cb,
+                    void *decrypt_key_cb_arg,
+                    SEC_PKCS7DecryptionAllowedCallback decrypt_allowed_cb)
+{
+    SEC_PKCS7DecoderContext *p7dcx;
+
+    p7dcx = SEC_PKCS7DecoderStart(cb, cb_arg, pwfn, pwfn_arg, decrypt_key_cb,
+                                  decrypt_key_cb_arg, decrypt_allowed_cb);
+    if (!p7dcx) {
+        /* error code is set */
+        return NULL;
+    }
+    (void)SEC_PKCS7DecoderUpdate(p7dcx, (char *)p7item->data, p7item->len);
+    return SEC_PKCS7DecoderFinish(p7dcx);
+}
+
+/*
+ * Abort the ASN.1 stream. Used by pkcs 12
+ */
+void
+SEC_PKCS7DecoderAbort(SEC_PKCS7DecoderContext *p7dcx, int error)
+{
+    PORT_Assert(p7dcx);
+    SEC_ASN1DecoderAbort(p7dcx->dcx, error);
+}
+
+/*
+ * If the thing contains any certs or crls return true; false otherwise.
+ */
+PRBool
+SEC_PKCS7ContainsCertsOrCrls(SEC_PKCS7ContentInfo *cinfo)
+{
+    SECOidTag kind;
+    SECItem **certs;
+    CERTSignedCrl **crls;
+
+    kind = SEC_PKCS7ContentType(cinfo);
+    switch (kind) {
+        default:
+        case SEC_OID_PKCS7_DATA:
+        case SEC_OID_PKCS7_DIGESTED_DATA:
+        case SEC_OID_PKCS7_ENVELOPED_DATA:
+        case SEC_OID_PKCS7_ENCRYPTED_DATA:
+            return PR_FALSE;
+        case SEC_OID_PKCS7_SIGNED_DATA:
+            certs = cinfo->content.signedData->rawCerts;
+            crls = cinfo->content.signedData->crls;
+            break;
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA:
+            certs = cinfo->content.signedAndEnvelopedData->rawCerts;
+            crls = cinfo->content.signedAndEnvelopedData->crls;
+            break;
+    }
+
+    /*
+     * I know this could be collapsed, but I was in a mood to be explicit.
+     */
+    if (certs != NULL && certs[0] != NULL)
+        return PR_TRUE;
+    else if (crls != NULL && crls[0] != NULL)
+        return PR_TRUE;
+    else
+        return PR_FALSE;
+}
+
+/* return the content length...could use GetContent, however we
+ * need the encrypted content length
+ */
+PRBool
+SEC_PKCS7IsContentEmpty(SEC_PKCS7ContentInfo *cinfo, unsigned int minLen)
+{
+    SECItem *item = NULL;
+
+    if (cinfo == NULL) {
+        return PR_TRUE;
+    }
+
+    switch (SEC_PKCS7ContentType(cinfo)) {
+        case SEC_OID_PKCS7_DATA:
+            item = cinfo->content.data;
+            break;
+        case SEC_OID_PKCS7_ENCRYPTED_DATA:
+            item = &cinfo->content.encryptedData->encContentInfo.encContent;
+            break;
+        default:
+            /* add other types */
+            return PR_FALSE;
+    }
+
+    if (!item) {
+        return PR_TRUE;
+    } else if (item->len <= minLen) {
+        return PR_TRUE;
+    }
+
+    return PR_FALSE;
+}
+
+PRBool
+SEC_PKCS7ContentIsEncrypted(SEC_PKCS7ContentInfo *cinfo)
+{
+    SECOidTag kind;
+
+    kind = SEC_PKCS7ContentType(cinfo);
+    switch (kind) {
+        default:
+        case SEC_OID_PKCS7_DATA:
+        case SEC_OID_PKCS7_DIGESTED_DATA:
+        case SEC_OID_PKCS7_SIGNED_DATA:
+            return PR_FALSE;
+        case SEC_OID_PKCS7_ENCRYPTED_DATA:
+        case SEC_OID_PKCS7_ENVELOPED_DATA:
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA:
+            return PR_TRUE;
+    }
+}
+
+/*
+ * If the PKCS7 content has a signature (not just *could* have a signature)
+ * return true; false otherwise.  This can/should be called before calling
+ * VerifySignature, which will always indicate failure if no signature is
+ * present, but that does not mean there even was a signature!
+ * Note that the content itself can be empty (detached content was sent
+ * another way); it is the presence of the signature that matters.
+ */
+PRBool
+SEC_PKCS7ContentIsSigned(SEC_PKCS7ContentInfo *cinfo)
+{
+    SECOidTag kind;
+    SEC_PKCS7SignerInfo **signerinfos;
+
+    kind = SEC_PKCS7ContentType(cinfo);
+    switch (kind) {
+        default:
+        case SEC_OID_PKCS7_DATA:
+        case SEC_OID_PKCS7_DIGESTED_DATA:
+        case SEC_OID_PKCS7_ENVELOPED_DATA:
+        case SEC_OID_PKCS7_ENCRYPTED_DATA:
+            return PR_FALSE;
+        case SEC_OID_PKCS7_SIGNED_DATA:
+            signerinfos = cinfo->content.signedData->signerInfos;
+            break;
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA:
+            signerinfos = cinfo->content.signedAndEnvelopedData->signerInfos;
+            break;
+    }
+
+    /*
+     * I know this could be collapsed; but I kind of think it will get
+     * more complicated before I am finished, so...
+     */
+    if (signerinfos != NULL && signerinfos[0] != NULL)
+        return PR_TRUE;
+    else
+        return PR_FALSE;
+}
+
+/*
+ * sec_pkcs7_verify_signature
+ *
+ *      Look at a PKCS7 contentInfo and check if the signature is good.
+ *      The digest was either calculated earlier (and is stored in the
+ *      contentInfo itself) or is passed in via "detached_digest".
+ *
+ *      The verification checks that the signing cert is valid and trusted
+ *      for the purpose specified by "certusage" at
+ *      - "*atTime" if "atTime" is not null, or
+ *      - the signing time if the signing time is available in "cinfo", or
+ *      - the current time (as returned by PR_Now).
+ *
+ *      In addition, if "keepcerts" is true, add any new certificates found
+ *      into our local database.
+ *
+ * XXX Each place which returns PR_FALSE should be sure to have a good
+ * error set for inspection by the caller.  Alternatively, we could create
+ * an enumeration of success and each type of failure and return that
+ * instead of a boolean.  For now, the default in a bad situation is to
+ * set the error to SEC_ERROR_PKCS7_BAD_SIGNATURE.  But this should be
+ * reviewed; better (more specific) errors should be possible (to distinguish
+ * a signature failure from a badly-formed pkcs7 signedData, for example).
+ * Some of the errors should probably just be SEC_ERROR_BAD_SIGNATURE,
+ * but that has a less helpful error string associated with it right now;
+ * if/when that changes, review and change these as needed.
+ *
+ * XXX This is broken wrt signedAndEnvelopedData.  In that case, the
+ * message digest is doubly encrypted -- first encrypted with the signer
+ * private key but then again encrypted with the bulk encryption key used
+ * to encrypt the content.  So before we can pass the digest to VerifyDigest,
+ * we need to decrypt it with the bulk encryption key.  Also, in this case,
+ * there should be NO authenticatedAttributes (signerinfo->authAttr should
+ * be NULL).
+ */
+static PRBool
+sec_pkcs7_verify_signature(SEC_PKCS7ContentInfo *cinfo,
+                           SECCertUsage certusage,
+                           const SECItem *detached_digest,
+                           HASH_HashType digest_type,
+                           PRBool keepcerts,
+                           const PRTime *atTime)
+{
+    SECAlgorithmID **digestalgs, *bulkid;
+    const SECItem *digest;
+    SECItem **digests;
+    SECItem **rawcerts;
+    SEC_PKCS7SignerInfo **signerinfos, *signerinfo;
+    CERTCertificate *cert, **certs;
+    PRBool goodsig;
+    CERTCertDBHandle *certdb, *defaultdb;
+    SECOidTag encTag, digestTag;
+    HASH_HashType found_type;
+    int i, certcount;
+    SECKEYPublicKey *publickey;
+    SECItem *content_type;
+    PK11SymKey *sigkey;
+    SECItem *encoded_stime;
+    PRTime stime;
+    PRTime verificationTime;
+    SECStatus rv;
+
+    /*
+     * Everything needed in order to "goto done" safely.
+     */
+    goodsig = PR_FALSE;
+    certcount = 0;
+    cert = NULL;
+    certs = NULL;
+    certdb = NULL;
+    defaultdb = CERT_GetDefaultCertDB();
+    publickey = NULL;
+
+    if (!SEC_PKCS7ContentIsSigned(cinfo)) {
+        PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
+        goto done;
+    }
+
+    PORT_Assert(cinfo->contentTypeTag != NULL);
+
+    switch (cinfo->contentTypeTag->offset) {
+        default:
+        case SEC_OID_PKCS7_DATA:
+        case SEC_OID_PKCS7_DIGESTED_DATA:
+        case SEC_OID_PKCS7_ENVELOPED_DATA:
+        case SEC_OID_PKCS7_ENCRYPTED_DATA:
+            /* Could only get here if SEC_PKCS7ContentIsSigned is broken. */
+            PORT_Assert(0);
+        case SEC_OID_PKCS7_SIGNED_DATA: {
+            SEC_PKCS7SignedData *sdp;
+
+            sdp = cinfo->content.signedData;
+            digestalgs = sdp->digestAlgorithms;
+            digests = sdp->digests;
+            rawcerts = sdp->rawCerts;
+            signerinfos = sdp->signerInfos;
+            content_type = &(sdp->contentInfo.contentType);
+            sigkey = NULL;
+            bulkid = NULL;
+        } break;
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA: {
+            SEC_PKCS7SignedAndEnvelopedData *saedp;
+
+            saedp = cinfo->content.signedAndEnvelopedData;
+            digestalgs = saedp->digestAlgorithms;
+            digests = saedp->digests;
+            rawcerts = saedp->rawCerts;
+            signerinfos = saedp->signerInfos;
+            content_type = &(saedp->encContentInfo.contentType);
+            sigkey = saedp->sigKey;
+            bulkid = &(saedp->encContentInfo.contentEncAlg);
+        } break;
+    }
+
+    if ((signerinfos == NULL) || (signerinfos[0] == NULL)) {
+        PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
+        goto done;
+    }
+
+    /*
+     * XXX Need to handle multiple signatures; checking them is easy,
+     * but what should be the semantics here (like, return value)?
+     */
+    if (signerinfos[1] != NULL) {
+        PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
+        goto done;
+    }
+
+    signerinfo = signerinfos[0];
+
+    /*
+     * XXX I would like to just pass the issuerAndSN, along with the rawcerts
+     * and crls, to some function that did all of this certificate stuff
+     * (open/close the database if necessary, verifying the certs, etc.)
+     * and gave me back a cert pointer if all was good.
+     */
+    certdb = defaultdb;
+    if (certdb == NULL) {
+        goto done;
+    }
+
+    certcount = 0;
+    if (rawcerts != NULL) {
+        for (; rawcerts[certcount] != NULL; certcount++) {
+            /* just counting */
+        }
+    }
+
+    /*
+     * Note that the result of this is that each cert in "certs"
+     * needs to be destroyed.
+     */
+    rv = CERT_ImportCerts(certdb, certusage, certcount, rawcerts, &certs,
+                          keepcerts, PR_FALSE, NULL);
+    if (rv != SECSuccess) {
+        goto done;
+    }
+
+    /*
+     * This cert will also need to be freed, but since we save it
+     * in signerinfo for later, we do not want to destroy it when
+     * we leave this function -- we let the clean-up of the entire
+     * cinfo structure later do the destroy of this cert.
+     */
+    cert = CERT_FindCertByIssuerAndSN(certdb, signerinfo->issuerAndSN);
+    if (cert == NULL) {
+        goto done;
+    }
+
+    signerinfo->cert = cert;
+
+    /*
+     * Get and convert the signing time; if available, it will be used
+     * both on the cert verification and for importing the sender
+     * email profile.
+     */
+    encoded_stime = SEC_PKCS7GetSigningTime(cinfo);
+    if (encoded_stime != NULL) {
+        if (DER_DecodeTimeChoice(&stime, encoded_stime) != SECSuccess)
+            encoded_stime = NULL; /* conversion failed, so pretend none */
+    }
+
+    /*
+     * XXX  This uses the signing time, if available.  Additionally, we
+     * might want to, if there is no signing time, get the message time
+     * from the mail header itself, and use that.  That would require
+     * a change to our interface though, and for S/MIME callers to pass
+     * in a time (and for non-S/MIME callers to pass in nothing, or
+     * maybe make them pass in the current time, always?).
+     */
+    if (atTime) {
+        verificationTime = *atTime;
+    } else if (encoded_stime != NULL) {
+        verificationTime = stime;
+    } else {
+        verificationTime = PR_Now();
+    }
+    if (CERT_VerifyCert(certdb, cert, PR_TRUE, certusage, verificationTime,
+                        cinfo->pwfn_arg, NULL) != SECSuccess) {
+        /*
+         * XXX Give the user an option to check the signature anyway?
+         * If we want to do this, need to give a way to leave and display
+         * some dialog and get the answer and come back through (or do
+         * the rest of what we do below elsewhere, maybe by putting it
+         * in a function that we call below and could call from a dialog
+         * finish handler).
+         */
+        goto savecert;
+    }
+
+    publickey = CERT_ExtractPublicKey(cert);
+    if (publickey == NULL)
+        goto done;
+
+    /*
+     * XXX No!  If digests is empty, see if we can create it now by
+     * digesting the contents.  This is necessary if we want to allow
+     * somebody to do a simple decode (without filtering, etc.) and
+     * then later call us here to do the verification.
+     * OR, we can just specify that the interface to this routine
+     * *requires* that the digest(s) be done before calling and either
+     * stashed in the struct itself or passed in explicitly (as would
+     * be done for detached contents).
+     */
+    if ((digests == NULL || digests[0] == NULL) && (detached_digest == NULL || detached_digest->data == NULL))
+        goto done;
+
+    /*
+     * Find and confirm digest algorithm.
+     */
+    digestTag = SECOID_FindOIDTag(&(signerinfo->digestAlg.algorithm));
+
+    /* make sure we understand the digest type first */
+    found_type = HASH_GetHashTypeByOidTag(digestTag);
+    if ((digestTag == SEC_OID_UNKNOWN) || (found_type == HASH_AlgNULL)) {
+        PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
+        goto done;
+    }
+
+    if (detached_digest != NULL) {
+        unsigned int hashLen = HASH_ResultLen(found_type);
+
+        if (digest_type != found_type ||
+            detached_digest->len != hashLen) {
+            PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
+            goto done;
+        }
+        digest = detached_digest;
+    } else {
+        PORT_Assert(digestalgs != NULL && digestalgs[0] != NULL);
+        if (digestalgs == NULL || digestalgs[0] == NULL) {
+            PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
+            goto done;
+        }
+
+        /*
+         * pick digest matching signerinfo->digestAlg from digests
+         */
+        for (i = 0; digestalgs[i] != NULL; i++) {
+            if (SECOID_FindOIDTag(&(digestalgs[i]->algorithm)) == digestTag)
+                break;
+        }
+        if (digestalgs[i] == NULL) {
+            PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
+            goto done;
+        }
+
+        digest = digests[i];
+    }
+
+    encTag = SECOID_FindOIDTag(&(signerinfo->digestEncAlg.algorithm));
+    if (encTag == SEC_OID_UNKNOWN) {
+        PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
+        goto done;
+    }
+
+    if (signerinfo->authAttr != NULL) {
+        SEC_PKCS7Attribute *attr;
+        SECItem *value;
+        SECItem encoded_attrs;
+
+        /*
+         * We have a sigkey only for signedAndEnvelopedData, which is
+         * not supposed to have any authenticated attributes.
+         */
+        if (sigkey != NULL) {
+            PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
+            goto done;
+        }
+
+        /*
+         * PKCS #7 says that if there are any authenticated attributes,
+         * then there must be one for content type which matches the
+         * content type of the content being signed, and there must
+         * be one for message digest which matches our message digest.
+         * So check these things first.
+         * XXX Might be nice to have a compare-attribute-value function
+         * which could collapse the following nicely.
+         */
+        attr = sec_PKCS7FindAttribute(signerinfo->authAttr,
+                                      SEC_OID_PKCS9_CONTENT_TYPE, PR_TRUE);
+        value = sec_PKCS7AttributeValue(attr);
+        if (value == NULL || value->len != content_type->len) {
+            PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
+            goto done;
+        }
+        if (PORT_Memcmp(value->data, content_type->data, value->len) != 0) {
+            PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
+            goto done;
+        }
+
+        attr = sec_PKCS7FindAttribute(signerinfo->authAttr,
+                                      SEC_OID_PKCS9_MESSAGE_DIGEST, PR_TRUE);
+        value = sec_PKCS7AttributeValue(attr);
+        if (value == NULL || value->len != digest->len) {
+            PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
+            goto done;
+        }
+        if (PORT_Memcmp(value->data, digest->data, value->len) != 0) {
+            PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
+            goto done;
+        }
+
+        /*
+         * Okay, we met the constraints of the basic attributes.
+         * Now check the signature, which is based on a digest of
+         * the DER-encoded authenticated attributes.  So, first we
+         * encode and then we digest/verify.
+         */
+        encoded_attrs.data = NULL;
+        encoded_attrs.len = 0;
+        if (sec_PKCS7EncodeAttributes(NULL, &encoded_attrs,
+                                      &(signerinfo->authAttr)) == NULL)
+            goto done;
+
+        if (encoded_attrs.data == NULL || encoded_attrs.len == 0) {
+            PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
+            goto done;
+        }
+
+        goodsig = (PRBool)(VFY_VerifyDataDirect(encoded_attrs.data,
+                                                encoded_attrs.len,
+                                                publickey, &(signerinfo->encDigest),
+                                                encTag, digestTag, NULL,
+                                                cinfo->pwfn_arg) == SECSuccess);
+        PORT_Free(encoded_attrs.data);
+    } else {
+        SECItem *sig;
+        SECItem holder;
+
+        /*
+         * No authenticated attributes.
+         * The signature is based on the plain message digest.
+         */
+
+        sig = &(signerinfo->encDigest);
+        if (sig->len == 0) { /* bad signature */
+            PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
+            goto done;
+        }
+
+        if (sigkey != NULL) {
+            sec_PKCS7CipherObject *decryptobj;
+            unsigned int buflen;
+
+            /*
+             * For signedAndEnvelopedData, we first must decrypt the encrypted
+             * digest with the bulk encryption key.  The result is the normal
+             * encrypted digest (aka the signature).
+             */
+            decryptobj = sec_PKCS7CreateDecryptObject(sigkey, bulkid);
+            if (decryptobj == NULL)
+                goto done;
+
+            buflen = sec_PKCS7DecryptLength(decryptobj, sig->len, PR_TRUE);
+            PORT_Assert(buflen);
+            if (buflen == 0) { /* something is wrong */
+                sec_PKCS7DestroyDecryptObject(decryptobj);
+                goto done;
+            }
+
+            holder.data = (unsigned char *)PORT_Alloc(buflen);
+            if (holder.data == NULL) {
+                sec_PKCS7DestroyDecryptObject(decryptobj);
+                goto done;
+            }
+
+            rv = sec_PKCS7Decrypt(decryptobj, holder.data, &holder.len, buflen,
+                                  sig->data, sig->len, PR_TRUE);
+            sec_PKCS7DestroyDecryptObject(decryptobj);
+            if (rv != SECSuccess) {
+                goto done;
+            }
+
+            sig = &holder;
+        }
+
+        goodsig = (PRBool)(VFY_VerifyDigestDirect(digest, publickey, sig,
+                                                  encTag, digestTag, cinfo->pwfn_arg) == SECSuccess);
+
+        if (sigkey != NULL) {
+            PORT_Assert(sig == &holder);
+            PORT_ZFree(holder.data, holder.len);
+        }
+    }
+
+    if (!goodsig) {
+        /*
+         * XXX Change the generic error into our specific one, because
+         * in that case we get a better explanation out of the Security
+         * Advisor.  This is really a bug in our error strings (the
+         * "generic" error has a lousy/wrong message associated with it
+         * which assumes the signature verification was done for the
+         * purposes of checking the issuer signature on a certificate)
+         * but this is at least an easy workaround and/or in the
+         * Security Advisor, which specifically checks for the error
+         * SEC_ERROR_PKCS7_BAD_SIGNATURE and gives more explanation
+         * in that case but does not similarly check for
+         * SEC_ERROR_BAD_SIGNATURE.  It probably should, but then would
+         * probably say the wrong thing in the case that it *was* the
+         * certificate signature check that failed during the cert
+         * verification done above.  Our error handling is really a mess.
+         */
+        if (PORT_GetError() == SEC_ERROR_BAD_SIGNATURE)
+            PORT_SetError(SEC_ERROR_PKCS7_BAD_SIGNATURE);
+    }
+
+savecert:
+    /*
+     * Only save the smime profile if we are checking an email message and
+     * the cert has an email address in it.
+     */
+    if (cert->emailAddr && cert->emailAddr[0] &&
+        ((certusage == certUsageEmailSigner) ||
+         (certusage == certUsageEmailRecipient))) {
+        SECItem *profile = NULL;
+        int save_error;
+
+        /*
+         * Remember the current error set because we do not care about
+         * anything set by the functions we are about to call.
+         */
+        save_error = PORT_GetError();
+
+        if (goodsig && (signerinfo->authAttr != NULL)) {
+            /*
+             * If the signature is good, then we can save the S/MIME profile,
+             * if we have one.
+             */
+            SEC_PKCS7Attribute *attr;
+
+            attr = sec_PKCS7FindAttribute(signerinfo->authAttr,
+                                          SEC_OID_PKCS9_SMIME_CAPABILITIES,
+                                          PR_TRUE);
+            profile = sec_PKCS7AttributeValue(attr);
+        }
+
+        rv = CERT_SaveSMimeProfile(cert, profile, encoded_stime);
+
+        /*
+         * Restore the saved error in case the calls above set a new
+         * one that we do not actually care about.
+         */
+        PORT_SetError(save_error);
+
+        /*
+         * XXX Failure is not indicated anywhere -- the signature
+         * verification itself is unaffected by whether or not the
+         * profile was successfully saved.
+         */
+    }
+
+done:
+
+    /*
+     * See comment above about why we do not want to destroy cert
+     * itself here.
+     */
+
+    if (certs != NULL)
+        CERT_DestroyCertArray(certs, certcount);
+
+    if (publickey != NULL)
+        SECKEY_DestroyPublicKey(publickey);
+
+    return goodsig;
+}
+
+/*
+ * SEC_PKCS7VerifySignature
+ *      Look at a PKCS7 contentInfo and check if the signature is good.
+ *      The verification checks that the signing cert is valid and trusted
+ *      for the purpose specified by "certusage".
+ *
+ *      In addition, if "keepcerts" is true, add any new certificates found
+ *      into our local database.
+ */
+PRBool
+SEC_PKCS7VerifySignature(SEC_PKCS7ContentInfo *cinfo,
+                         SECCertUsage certusage,
+                         PRBool keepcerts)
+{
+    return sec_pkcs7_verify_signature(cinfo, certusage,
+                                      NULL, HASH_AlgNULL, keepcerts, NULL);
+}
+
+/*
+ * SEC_PKCS7VerifyDetachedSignature
+ *      Look at a PKCS7 contentInfo and check if the signature matches
+ *      a passed-in digest (calculated, supposedly, from detached contents).
+ *      The verification checks that the signing cert is valid and trusted
+ *      for the purpose specified by "certusage".
+ *
+ *      In addition, if "keepcerts" is true, add any new certificates found
+ *      into our local database.
+ */
+PRBool
+SEC_PKCS7VerifyDetachedSignature(SEC_PKCS7ContentInfo *cinfo,
+                                 SECCertUsage certusage,
+                                 const SECItem *detached_digest,
+                                 HASH_HashType digest_type,
+                                 PRBool keepcerts)
+{
+    return sec_pkcs7_verify_signature(cinfo, certusage,
+                                      detached_digest, digest_type,
+                                      keepcerts, NULL);
+}
+
+/*
+ * SEC_PKCS7VerifyDetachedSignatureAtTime
+ *      Look at a PKCS7 contentInfo and check if the signature matches
+ *      a passed-in digest (calculated, supposedly, from detached contents).
+ *      The verification checks that the signing cert is valid and trusted
+ *      for the purpose specified by "certusage" at time "atTime".
+ *
+ *      In addition, if "keepcerts" is true, add any new certificates found
+ *      into our local database.
+ */
+PRBool
+SEC_PKCS7VerifyDetachedSignatureAtTime(SEC_PKCS7ContentInfo *cinfo,
+                                       SECCertUsage certusage,
+                                       const SECItem *detached_digest,
+                                       HASH_HashType digest_type,
+                                       PRBool keepcerts,
+                                       PRTime atTime)
+{
+    return sec_pkcs7_verify_signature(cinfo, certusage,
+                                      detached_digest, digest_type,
+                                      keepcerts, &atTime);
+}
+
+/*
+ * Return the asked-for portion of the name of the signer of a PKCS7
+ * signed object.
+ *
+ * Returns a pointer to allocated memory, which must be freed.
+ * A NULL return value is an error.
+ */
+
+#define sec_common_name 1
+#define sec_email_address 2
+
+static char *
+sec_pkcs7_get_signer_cert_info(SEC_PKCS7ContentInfo *cinfo, int selector)
+{
+    SECOidTag kind;
+    SEC_PKCS7SignerInfo **signerinfos;
+    CERTCertificate *signercert;
+    char *container;
+
+    kind = SEC_PKCS7ContentType(cinfo);
+    switch (kind) {
+        default:
+        case SEC_OID_PKCS7_DATA:
+        case SEC_OID_PKCS7_DIGESTED_DATA:
+        case SEC_OID_PKCS7_ENVELOPED_DATA:
+        case SEC_OID_PKCS7_ENCRYPTED_DATA:
+            PORT_Assert(0);
+            return NULL;
+        case SEC_OID_PKCS7_SIGNED_DATA: {
+            SEC_PKCS7SignedData *sdp;
+
+            sdp = cinfo->content.signedData;
+            signerinfos = sdp->signerInfos;
+        } break;
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA: {
+            SEC_PKCS7SignedAndEnvelopedData *saedp;
+
+            saedp = cinfo->content.signedAndEnvelopedData;
+            signerinfos = saedp->signerInfos;
+        } break;
+    }
+
+    if (signerinfos == NULL || signerinfos[0] == NULL)
+        return NULL;
+
+    signercert = signerinfos[0]->cert;
+
+    /*
+     * No cert there; see if we can find one by calling verify ourselves.
+     */
+    if (signercert == NULL) {
+        /*
+         * The cert usage does not matter in this case, because we do not
+         * actually care about the verification itself, but we have to pick
+         * some valid usage to pass in.
+         */
+        (void)sec_pkcs7_verify_signature(cinfo, certUsageEmailSigner,
+                                         NULL, HASH_AlgNULL, PR_FALSE, NULL);
+        signercert = signerinfos[0]->cert;
+        if (signercert == NULL)
+            return NULL;
+    }
+
+    switch (selector) {
+        case sec_common_name:
+            container = CERT_GetCommonName(&signercert->subject);
+            break;
+        case sec_email_address:
+            if (signercert->emailAddr && signercert->emailAddr[0]) {
+                container = PORT_Strdup(signercert->emailAddr);
+            } else {
+                container = NULL;
+            }
+            break;
+        default:
+            PORT_Assert(0);
+            container = NULL;
+            break;
+    }
+
+    return container;
+}
+
+char *
+SEC_PKCS7GetSignerCommonName(SEC_PKCS7ContentInfo *cinfo)
+{
+    return sec_pkcs7_get_signer_cert_info(cinfo, sec_common_name);
+}
+
+char *
+SEC_PKCS7GetSignerEmailAddress(SEC_PKCS7ContentInfo *cinfo)
+{
+    return sec_pkcs7_get_signer_cert_info(cinfo, sec_email_address);
+}
+
+/*
+ * Return the signing time, in UTCTime format, of a PKCS7 contentInfo.
+ */
+SECItem *
+SEC_PKCS7GetSigningTime(SEC_PKCS7ContentInfo *cinfo)
+{
+    SEC_PKCS7SignerInfo **signerinfos;
+    SEC_PKCS7Attribute *attr;
+
+    if (SEC_PKCS7ContentType(cinfo) != SEC_OID_PKCS7_SIGNED_DATA)
+        return NULL;
+
+    signerinfos = cinfo->content.signedData->signerInfos;
+
+    /*
+     * No signature, or more than one, means no deal.
+     */
+    if (signerinfos == NULL || signerinfos[0] == NULL || signerinfos[1] != NULL)
+        return NULL;
+
+    attr = sec_PKCS7FindAttribute(signerinfos[0]->authAttr,
+                                  SEC_OID_PKCS9_SIGNING_TIME, PR_TRUE);
+    return sec_PKCS7AttributeValue(attr);
+}
diff --git a/security/nss/lib/pkcs7/p7encode.c b/security/nss/lib/pkcs7/p7encode.c
new file mode 100644
index 0000000000..739e25f812
--- /dev/null
+++ b/security/nss/lib/pkcs7/p7encode.c
@@ -0,0 +1,1079 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * PKCS7 encoding.
+ */
+
+#include "p7local.h"
+
+#include "cert.h"
+#include "cryptohi.h"
+#include "keyhi.h"
+#include "secasn1.h"
+#include "secoid.h"
+#include "secitem.h"
+#include "pk11func.h"
+#include "secerr.h"
+#include "sechash.h" /* for HASH_GetHashObject() */
+
+struct sec_pkcs7_encoder_output {
+    SEC_PKCS7EncoderOutputCallback outputfn;
+    void *outputarg;
+};
+
+struct SEC_PKCS7EncoderContextStr {
+    SEC_ASN1EncoderContext *ecx;
+    SEC_PKCS7ContentInfo *cinfo;
+    struct sec_pkcs7_encoder_output output;
+    sec_PKCS7CipherObject *encryptobj;
+    const SECHashObject *digestobj;
+    void *digestcx;
+};
+
+/*
+ * The little output function that the ASN.1 encoder calls to hand
+ * us bytes which we in turn hand back to our caller (via the callback
+ * they gave us).
+ */
+static void
+sec_pkcs7_encoder_out(void *arg, const char *buf, unsigned long len,
+                      int depth, SEC_ASN1EncodingPart data_kind)
+{
+    struct sec_pkcs7_encoder_output *output;
+
+    output = (struct sec_pkcs7_encoder_output *)arg;
+    output->outputfn(output->outputarg, buf, len);
+}
+
+static sec_PKCS7CipherObject *
+sec_pkcs7_encoder_start_encrypt(SEC_PKCS7ContentInfo *cinfo,
+                                PK11SymKey *orig_bulkkey)
+{
+    SECOidTag kind;
+    sec_PKCS7CipherObject *encryptobj;
+    SEC_PKCS7RecipientInfo **recipientinfos, *ri;
+    SEC_PKCS7EncryptedContentInfo *enccinfo;
+    SECKEYPublicKey *publickey = NULL;
+    SECKEYPrivateKey *ourPrivKey = NULL;
+    PK11SymKey *bulkkey;
+    void *mark;
+    int i;
+    PLArenaPool *arena = NULL;
+
+    kind = SEC_PKCS7ContentType(cinfo);
+    switch (kind) {
+        default:
+        case SEC_OID_PKCS7_DATA:
+        case SEC_OID_PKCS7_DIGESTED_DATA:
+        case SEC_OID_PKCS7_SIGNED_DATA:
+            recipientinfos = NULL;
+            enccinfo = NULL;
+            break;
+        case SEC_OID_PKCS7_ENCRYPTED_DATA: {
+            SEC_PKCS7EncryptedData *encdp;
+
+            /* To do EncryptedData we *must* be given a bulk key. */
+            PORT_Assert(orig_bulkkey != NULL);
+            if (orig_bulkkey == NULL) {
+                /* XXX error? */
+                return NULL;
+            }
+
+            encdp = cinfo->content.encryptedData;
+            recipientinfos = NULL;
+            enccinfo = &(encdp->encContentInfo);
+        } break;
+        case SEC_OID_PKCS7_ENVELOPED_DATA: {
+            SEC_PKCS7EnvelopedData *envdp;
+
+            envdp = cinfo->content.envelopedData;
+            recipientinfos = envdp->recipientInfos;
+            enccinfo = &(envdp->encContentInfo);
+        } break;
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA: {
+            SEC_PKCS7SignedAndEnvelopedData *saedp;
+
+            saedp = cinfo->content.signedAndEnvelopedData;
+            recipientinfos = saedp->recipientInfos;
+            enccinfo = &(saedp->encContentInfo);
+        } break;
+    }
+
+    if (enccinfo == NULL)
+        return NULL;
+
+    bulkkey = orig_bulkkey;
+    if (bulkkey == NULL) {
+        CK_MECHANISM_TYPE type = PK11_AlgtagToMechanism(enccinfo->encalg);
+        PK11SlotInfo *slot;
+
+        slot = PK11_GetBestSlot(type, cinfo->pwfn_arg);
+        if (slot == NULL) {
+            return NULL;
+        }
+        bulkkey = PK11_KeyGen(slot, type, NULL, enccinfo->keysize / 8,
+                              cinfo->pwfn_arg);
+        PK11_FreeSlot(slot);
+        if (bulkkey == NULL) {
+            return NULL;
+        }
+    }
+
+    encryptobj = NULL;
+    mark = PORT_ArenaMark(cinfo->poolp);
+
+    /*
+     * Encrypt the bulk key with the public key of each recipient.
+     */
+    for (i = 0; recipientinfos && (ri = recipientinfos[i]) != NULL; i++) {
+        CERTCertificate *cert;
+        SECOidTag certalgtag, encalgtag;
+        SECStatus rv;
+        int data_len;
+        SECItem *params = NULL;
+
+        cert = ri->cert;
+        PORT_Assert(cert != NULL);
+        if (cert == NULL)
+            continue;
+
+        /*
+         * XXX Want an interface that takes a cert and some data and
+         * fills in an algorithmID and encrypts the data with the public
+         * key from the cert.  Or, give me two interfaces -- one which
+         * gets the algorithm tag from a cert (I should not have to go
+         * down into the subjectPublicKeyInfo myself) and another which
+         * takes a public key and algorithm tag and data and encrypts
+         * the data.  Or something like that.  The point is that all
+         * of the following hardwired RSA stuff should be done elsewhere.
+         */
+
+        certalgtag = SECOID_GetAlgorithmTag(&(cert->subjectPublicKeyInfo.algorithm));
+
+        switch (certalgtag) {
+            case SEC_OID_PKCS1_RSA_ENCRYPTION:
+                encalgtag = certalgtag;
+                publickey = CERT_ExtractPublicKey(cert);
+                if (publickey == NULL)
+                    goto loser;
+
+                data_len = SECKEY_PublicKeyStrength(publickey);
+                ri->encKey.data =
+                    (unsigned char *)PORT_ArenaAlloc(cinfo->poolp, data_len);
+                ri->encKey.len = data_len;
+                if (ri->encKey.data == NULL)
+                    goto loser;
+
+                rv = PK11_PubWrapSymKey(PK11_AlgtagToMechanism(certalgtag), publickey,
+                                        bulkkey, &ri->encKey);
+
+                SECKEY_DestroyPublicKey(publickey);
+                publickey = NULL;
+                if (rv != SECSuccess)
+                    goto loser;
+                params = NULL; /* paranoia */
+                break;
+            default:
+                PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
+                goto loser;
+        }
+
+        rv = SECOID_SetAlgorithmID(cinfo->poolp, &ri->keyEncAlg, encalgtag,
+                                   params);
+        if (rv != SECSuccess)
+            goto loser;
+        if (arena)
+            PORT_FreeArena(arena, PR_FALSE);
+        arena = NULL;
+    }
+
+    encryptobj = sec_PKCS7CreateEncryptObject(cinfo->poolp, bulkkey,
+                                              enccinfo->encalg,
+                                              &(enccinfo->contentEncAlg));
+    if (encryptobj != NULL) {
+        PORT_ArenaUnmark(cinfo->poolp, mark);
+        mark = NULL; /* good one; do not want to release */
+    }
+    /* fallthru */
+
+loser:
+    if (arena) {
+        PORT_FreeArena(arena, PR_FALSE);
+    }
+    if (publickey) {
+        SECKEY_DestroyPublicKey(publickey);
+    }
+    if (ourPrivKey) {
+        SECKEY_DestroyPrivateKey(ourPrivKey);
+    }
+    if (mark != NULL) {
+        PORT_ArenaRelease(cinfo->poolp, mark);
+    }
+    if (orig_bulkkey == NULL) {
+        if (bulkkey)
+            PK11_FreeSymKey(bulkkey);
+    }
+
+    return encryptobj;
+}
+
+static void
+sec_pkcs7_encoder_notify(void *arg, PRBool before, void *dest, int depth)
+{
+    SEC_PKCS7EncoderContext *p7ecx;
+    SEC_PKCS7ContentInfo *cinfo;
+    SECOidTag kind;
+    PRBool before_content;
+
+    /*
+     * We want to notice just before the content field.  After fields are
+     * not interesting to us.
+     */
+    if (!before)
+        return;
+
+    p7ecx = (SEC_PKCS7EncoderContext *)arg;
+    cinfo = p7ecx->cinfo;
+
+    before_content = PR_FALSE;
+
+    /*
+     * Watch for the content field, at which point we want to instruct
+     * the ASN.1 encoder to start taking bytes from the buffer.
+     *
+     * XXX The following assumes the inner content type is data;
+     * if/when we want to handle fully nested types, this will have
+     * to recurse until reaching the innermost data content.
+     */
+    kind = SEC_PKCS7ContentType(cinfo);
+    switch (kind) {
+        default:
+        case SEC_OID_PKCS7_DATA:
+            if (dest == &(cinfo->content.data))
+                before_content = PR_TRUE;
+            break;
+
+        case SEC_OID_PKCS7_DIGESTED_DATA: {
+            SEC_PKCS7DigestedData *digd;
+
+            digd = cinfo->content.digestedData;
+            if (digd == NULL)
+                break;
+
+            if (dest == &(digd->contentInfo.content))
+                before_content = PR_TRUE;
+        } break;
+
+        case SEC_OID_PKCS7_ENCRYPTED_DATA: {
+            SEC_PKCS7EncryptedData *encd;
+
+            encd = cinfo->content.encryptedData;
+            if (encd == NULL)
+                break;
+
+            if (dest == &(encd->encContentInfo.encContent))
+                before_content = PR_TRUE;
+        } break;
+
+        case SEC_OID_PKCS7_ENVELOPED_DATA: {
+            SEC_PKCS7EnvelopedData *envd;
+
+            envd = cinfo->content.envelopedData;
+            if (envd == NULL)
+                break;
+
+            if (dest == &(envd->encContentInfo.encContent))
+                before_content = PR_TRUE;
+        } break;
+
+        case SEC_OID_PKCS7_SIGNED_DATA: {
+            SEC_PKCS7SignedData *sigd;
+
+            sigd = cinfo->content.signedData;
+            if (sigd == NULL)
+                break;
+
+            if (dest == &(sigd->contentInfo.content))
+                before_content = PR_TRUE;
+        } break;
+
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA: {
+            SEC_PKCS7SignedAndEnvelopedData *saed;
+
+            saed = cinfo->content.signedAndEnvelopedData;
+            if (saed == NULL)
+                break;
+
+            if (dest == &(saed->encContentInfo.encContent))
+                before_content = PR_TRUE;
+        } break;
+    }
+
+    if (before_content) {
+        /*
+         * This will cause the next SEC_ASN1EncoderUpdate to take the
+         * contents bytes from the passed-in buffer.
+         */
+        SEC_ASN1EncoderSetTakeFromBuf(p7ecx->ecx);
+        /*
+         * And that is all we needed this notify function for.
+         */
+        SEC_ASN1EncoderClearNotifyProc(p7ecx->ecx);
+    }
+}
+
+static SEC_PKCS7EncoderContext *
+sec_pkcs7_encoder_start_contexts(SEC_PKCS7ContentInfo *cinfo,
+                                 PK11SymKey *bulkkey)
+{
+    SEC_PKCS7EncoderContext *p7ecx;
+    SECOidTag kind;
+    PRBool encrypt;
+    SECItem **digests;
+    SECAlgorithmID *digestalg, **digestalgs;
+
+    p7ecx =
+        (SEC_PKCS7EncoderContext *)PORT_ZAlloc(sizeof(SEC_PKCS7EncoderContext));
+    if (p7ecx == NULL)
+        return NULL;
+
+    digests = NULL;
+    digestalg = NULL;
+    digestalgs = NULL;
+    encrypt = PR_FALSE;
+
+    kind = SEC_PKCS7ContentType(cinfo);
+    switch (kind) {
+        default:
+        case SEC_OID_PKCS7_DATA:
+            break;
+        case SEC_OID_PKCS7_DIGESTED_DATA:
+            digestalg = &(cinfo->content.digestedData->digestAlg);
+            break;
+        case SEC_OID_PKCS7_SIGNED_DATA:
+            digests = cinfo->content.signedData->digests;
+            digestalgs = cinfo->content.signedData->digestAlgorithms;
+            break;
+        case SEC_OID_PKCS7_ENCRYPTED_DATA:
+        case SEC_OID_PKCS7_ENVELOPED_DATA:
+            encrypt = PR_TRUE;
+            break;
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA:
+            digests = cinfo->content.signedAndEnvelopedData->digests;
+            digestalgs = cinfo->content.signedAndEnvelopedData->digestAlgorithms;
+            encrypt = PR_TRUE;
+            break;
+    }
+
+    if (encrypt) {
+        p7ecx->encryptobj = sec_pkcs7_encoder_start_encrypt(cinfo, bulkkey);
+        if (p7ecx->encryptobj == NULL) {
+            PORT_Free(p7ecx);
+            return NULL;
+        }
+    }
+
+    if (digestalgs != NULL) {
+        if (digests != NULL) {
+            /* digests already created (probably for detached data) */
+            digestalg = NULL;
+        } else {
+            /*
+             * XXX Some day we should handle multiple digests; for now,
+             * assume only one will be done.
+             */
+            PORT_Assert(digestalgs[0] != NULL && digestalgs[1] == NULL);
+            digestalg = digestalgs[0];
+        }
+    }
+
+    if (digestalg != NULL) {
+        SECOidTag oidTag = SECOID_FindOIDTag(&(digestalg->algorithm));
+
+        p7ecx->digestobj = HASH_GetHashObjectByOidTag(oidTag);
+        if (p7ecx->digestobj != NULL) {
+            p7ecx->digestcx = (*p7ecx->digestobj->create)();
+            if (p7ecx->digestcx == NULL)
+                p7ecx->digestobj = NULL;
+            else
+                (*p7ecx->digestobj->begin)(p7ecx->digestcx);
+        }
+        if (p7ecx->digestobj == NULL) {
+            if (p7ecx->encryptobj != NULL)
+                sec_PKCS7DestroyEncryptObject(p7ecx->encryptobj);
+            PORT_Free(p7ecx);
+            return NULL;
+        }
+    }
+
+    p7ecx->cinfo = cinfo;
+    return p7ecx;
+}
+
+SEC_PKCS7EncoderContext *
+SEC_PKCS7EncoderStart(SEC_PKCS7ContentInfo *cinfo,
+                      SEC_PKCS7EncoderOutputCallback outputfn,
+                      void *outputarg,
+                      PK11SymKey *bulkkey)
+{
+    SEC_PKCS7EncoderContext *p7ecx;
+    SECStatus rv;
+
+    p7ecx = sec_pkcs7_encoder_start_contexts(cinfo, bulkkey);
+    if (p7ecx == NULL)
+        return NULL;
+
+    p7ecx->output.outputfn = outputfn;
+    p7ecx->output.outputarg = outputarg;
+
+    /*
+     * Initialize the BER encoder.
+     */
+    p7ecx->ecx = SEC_ASN1EncoderStart(cinfo, sec_PKCS7ContentInfoTemplate,
+                                      sec_pkcs7_encoder_out, &(p7ecx->output));
+    if (p7ecx->ecx == NULL) {
+        PORT_Free(p7ecx);
+        return NULL;
+    }
+
+    /*
+     * Indicate that we are streaming.  We will be streaming until we
+     * get past the contents bytes.
+     */
+    SEC_ASN1EncoderSetStreaming(p7ecx->ecx);
+
+    /*
+     * The notify function will watch for the contents field.
+     */
+    SEC_ASN1EncoderSetNotifyProc(p7ecx->ecx, sec_pkcs7_encoder_notify, p7ecx);
+
+    /*
+     * This will encode everything up to the content bytes.  (The notify
+     * function will then cause the encoding to stop there.)  Then our
+     * caller can start passing contents bytes to our Update, which we
+     * will pass along.
+     */
+    rv = SEC_ASN1EncoderUpdate(p7ecx->ecx, NULL, 0);
+    if (rv != SECSuccess) {
+        PORT_Free(p7ecx);
+        return NULL;
+    }
+
+    return p7ecx;
+}
+
+/*
+ * XXX If/when we support nested contents, this needs to be revised.
+ */
+static SECStatus
+sec_pkcs7_encoder_work_data(SEC_PKCS7EncoderContext *p7ecx, SECItem *dest,
+                            const unsigned char *data, unsigned long len,
+                            PRBool final)
+{
+    unsigned char *buf = NULL;
+    SECStatus rv;
+
+    rv = SECSuccess; /* may as well be optimistic */
+
+    /*
+     * We should really have data to process, or we should be trying
+     * to finish/flush the last block.  (This is an overly paranoid
+     * check since all callers are in this file and simple inspection
+     * proves they do it right.  But it could find a bug in future
+     * modifications/development, that is why it is here.)
+     */
+    PORT_Assert((data != NULL && len) || final);
+
+    /*
+     * Update the running digest.
+     * XXX This needs modification if/when we handle multiple digests.
+     */
+    if (len && p7ecx->digestobj != NULL) {
+        (*p7ecx->digestobj->update)(p7ecx->digestcx, data, len);
+    }
+
+    /*
+     * Encrypt this chunk.
+     */
+    if (p7ecx->encryptobj != NULL) {
+        /* XXX the following lengths should all be longs? */
+        unsigned int inlen;  /* length of data being encrypted */
+        unsigned int outlen; /* length of encrypted data */
+        unsigned int buflen; /* length available for encrypted data */
+
+        inlen = len;
+        buflen = sec_PKCS7EncryptLength(p7ecx->encryptobj, inlen, final);
+        if (buflen == 0) {
+            /*
+             * No output is expected, but the input data may be buffered
+             * so we still have to call Encrypt.
+             */
+            rv = sec_PKCS7Encrypt(p7ecx->encryptobj, NULL, &outlen, 0,
+                                  data, inlen, final);
+            if (final) {
+                len = 0;
+                goto done;
+            }
+            return rv;
+        }
+
+        if (dest != NULL)
+            buf = (unsigned char *)PORT_ArenaAlloc(p7ecx->cinfo->poolp, buflen);
+        else
+            buf = (unsigned char *)PORT_Alloc(buflen);
+
+        if (buf == NULL) {
+            rv = SECFailure;
+        } else {
+            rv = sec_PKCS7Encrypt(p7ecx->encryptobj, buf, &outlen, buflen,
+                                  data, inlen, final);
+            data = buf;
+            len = outlen;
+        }
+        if (rv != SECSuccess) {
+            if (final)
+                goto done;
+            return rv;
+        }
+    }
+
+    if (p7ecx->ecx != NULL) {
+        /*
+         * Encode the contents bytes.
+         */
+        if (len) {
+            rv = SEC_ASN1EncoderUpdate(p7ecx->ecx, (const char *)data, len);
+        }
+    }
+
+done:
+    if (p7ecx->encryptobj != NULL) {
+        if (final)
+            sec_PKCS7DestroyEncryptObject(p7ecx->encryptobj);
+        if (dest != NULL) {
+            dest->data = buf;
+            dest->len = len;
+        } else if (buf != NULL) {
+            PORT_Free(buf);
+        }
+    }
+
+    if (final && p7ecx->digestobj != NULL) {
+        SECItem *digest, **digests, ***digestsp;
+        unsigned char *digdata;
+        SECOidTag kind;
+
+        kind = SEC_PKCS7ContentType(p7ecx->cinfo);
+        switch (kind) {
+            default:
+                PORT_Assert(0);
+                return SECFailure;
+            case SEC_OID_PKCS7_DIGESTED_DATA:
+                digest = &(p7ecx->cinfo->content.digestedData->digest);
+                digestsp = NULL;
+                break;
+            case SEC_OID_PKCS7_SIGNED_DATA:
+                digest = NULL;
+                digestsp = &(p7ecx->cinfo->content.signedData->digests);
+                break;
+            case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA:
+                digest = NULL;
+                digestsp = &(p7ecx->cinfo->content.signedAndEnvelopedData->digests);
+                break;
+        }
+
+        digdata = (unsigned char *)PORT_ArenaAlloc(p7ecx->cinfo->poolp,
+                                                   p7ecx->digestobj->length);
+        if (digdata == NULL)
+            return SECFailure;
+
+        if (digestsp != NULL) {
+            PORT_Assert(digest == NULL);
+
+            digest = (SECItem *)PORT_ArenaAlloc(p7ecx->cinfo->poolp,
+                                                sizeof(SECItem));
+            digests = (SECItem **)PORT_ArenaAlloc(p7ecx->cinfo->poolp,
+                                                  2 * sizeof(SECItem *));
+            if (digests == NULL || digest == NULL)
+                return SECFailure;
+
+            digests[0] = digest;
+            digests[1] = NULL;
+
+            *digestsp = digests;
+        }
+
+        PORT_Assert(digest != NULL);
+
+        digest->data = digdata;
+        digest->len = p7ecx->digestobj->length;
+
+        (*p7ecx->digestobj->end)(p7ecx->digestcx, digest->data,
+                                 &(digest->len), digest->len);
+        (*p7ecx->digestobj->destroy)(p7ecx->digestcx, PR_TRUE);
+    }
+
+    return rv;
+}
+
+SECStatus
+SEC_PKCS7EncoderUpdate(SEC_PKCS7EncoderContext *p7ecx,
+                       const char *data, unsigned long len)
+{
+    /* XXX Error handling needs help.  Return what?  Do "Finish" on failure? */
+    return sec_pkcs7_encoder_work_data(p7ecx, NULL,
+                                       (const unsigned char *)data, len,
+                                       PR_FALSE);
+}
+
+static SECStatus
+sec_pkcs7_encoder_sig_and_certs(SEC_PKCS7ContentInfo *cinfo,
+                                SECKEYGetPasswordKey pwfn, void *pwfnarg)
+{
+    SECOidTag kind;
+    CERTCertificate **certs;
+    CERTCertificateList **certlists;
+    SECAlgorithmID **digestalgs;
+    SECItem **digests;
+    SEC_PKCS7SignerInfo *signerinfo, **signerinfos;
+    SECItem **rawcerts, ***rawcertsp;
+    PLArenaPool *poolp;
+    int certcount;
+    int ci, cli, rci, si;
+
+    kind = SEC_PKCS7ContentType(cinfo);
+    switch (kind) {
+        default:
+        case SEC_OID_PKCS7_DATA:
+        case SEC_OID_PKCS7_DIGESTED_DATA:
+        case SEC_OID_PKCS7_ENCRYPTED_DATA:
+        case SEC_OID_PKCS7_ENVELOPED_DATA:
+            certs = NULL;
+            certlists = NULL;
+            digestalgs = NULL;
+            digests = NULL;
+            signerinfos = NULL;
+            rawcertsp = NULL;
+            break;
+        case SEC_OID_PKCS7_SIGNED_DATA: {
+            SEC_PKCS7SignedData *sdp;
+
+            sdp = cinfo->content.signedData;
+            certs = sdp->certs;
+            certlists = sdp->certLists;
+            digestalgs = sdp->digestAlgorithms;
+            digests = sdp->digests;
+            signerinfos = sdp->signerInfos;
+            rawcertsp = &(sdp->rawCerts);
+        } break;
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA: {
+            SEC_PKCS7SignedAndEnvelopedData *saedp;
+
+            saedp = cinfo->content.signedAndEnvelopedData;
+            certs = saedp->certs;
+            certlists = saedp->certLists;
+            digestalgs = saedp->digestAlgorithms;
+            digests = saedp->digests;
+            signerinfos = saedp->signerInfos;
+            rawcertsp = &(saedp->rawCerts);
+        } break;
+    }
+
+    if (certs == NULL && certlists == NULL && signerinfos == NULL)
+        return SECSuccess; /* nothing for us to do! */
+
+    poolp = cinfo->poolp;
+    certcount = 0;
+
+    if (signerinfos != NULL) {
+        SECOidTag digestalgtag;
+        int di;
+        SECStatus rv;
+        CERTCertificate *cert;
+        SECKEYPrivateKey *privkey;
+        SECItem signature;
+        SECOidTag signalgtag;
+
+        PORT_Assert(digestalgs != NULL && digests != NULL);
+
+        /*
+         * If one fails, we bail right then.  If we want to continue and
+         * try to do subsequent signatures, this loop, and the departures
+         * from it, will need to be reworked.
+         */
+        for (si = 0; signerinfos[si] != NULL; si++) {
+
+            signerinfo = signerinfos[si];
+
+            /* find right digest */
+            digestalgtag = SECOID_GetAlgorithmTag(&(signerinfo->digestAlg));
+            for (di = 0; digestalgs[di] != NULL; di++) {
+                /* XXX Should I be comparing more than the tag? */
+                if (digestalgtag == SECOID_GetAlgorithmTag(digestalgs[di]))
+                    break;
+            }
+            if (digestalgs[di] == NULL) {
+                /* XXX oops; do what? set an error? */
+                return SECFailure;
+            }
+            PORT_Assert(digests[di] != NULL);
+
+            cert = signerinfo->cert;
+            privkey = PK11_FindKeyByAnyCert(cert, pwfnarg);
+            if (privkey == NULL)
+                return SECFailure;
+
+            /*
+             * XXX I think there should be a cert-level interface for this,
+             * so that I do not have to know about subjectPublicKeyInfo...
+             */
+            signalgtag = SECOID_GetAlgorithmTag(&(cert->subjectPublicKeyInfo.algorithm));
+
+            if (signerinfo->authAttr != NULL) {
+                SEC_PKCS7Attribute *attr;
+                SECItem encoded_attrs;
+                SECItem *dummy;
+                SECOidTag algid;
+
+                /*
+                 * First, find and fill in the message digest attribute.
+                 */
+                attr = sec_PKCS7FindAttribute(signerinfo->authAttr,
+                                              SEC_OID_PKCS9_MESSAGE_DIGEST,
+                                              PR_TRUE);
+                PORT_Assert(attr != NULL);
+                if (attr == NULL) {
+                    SECKEY_DestroyPrivateKey(privkey);
+                    return SECFailure;
+                }
+
+                /*
+                 * XXX The second half of the following assertion prevents
+                 * the encoder from being called twice on the same content.
+                 * Either just remove the second half the assertion, or
+                 * change the code to check if the value already there is
+                 * the same as digests[di], whichever seems more right.
+                 */
+                PORT_Assert(attr->values != NULL && attr->values[0] == NULL);
+                attr->values[0] = digests[di];
+
+                /*
+                 * Before encoding, reorder the attributes so that when they
+                 * are encoded, they will be conforming DER, which is required
+                 * to have a specific order and that is what must be used for
+                 * the hash/signature.  We do this here, rather than building
+                 * it into EncodeAttributes, because we do not want to do
+                 * such reordering on incoming messages (which also uses
+                 * EncodeAttributes) or our old signatures (and other "broken"
+                 * implementations) will not verify.  So, we want to guarantee
+                 * that we send out good DER encodings of attributes, but not
+                 * to expect to receive them.
+                 */
+                rv = sec_PKCS7ReorderAttributes(signerinfo->authAttr);
+                if (rv != SECSuccess) {
+                    SECKEY_DestroyPrivateKey(privkey);
+                    return SECFailure;
+                }
+
+                encoded_attrs.data = NULL;
+                encoded_attrs.len = 0;
+                dummy = sec_PKCS7EncodeAttributes(NULL, &encoded_attrs,
+                                                  &(signerinfo->authAttr));
+                if (dummy == NULL) {
+                    SECKEY_DestroyPrivateKey(privkey);
+                    return SECFailure;
+                }
+
+                algid = SEC_GetSignatureAlgorithmOidTag(privkey->keyType,
+                                                        digestalgtag);
+                if (algid == SEC_OID_UNKNOWN) {
+                    PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
+                    SECKEY_DestroyPrivateKey(privkey);
+                    return SECFailure;
+                }
+                rv = SEC_SignData(&signature,
+                                  encoded_attrs.data, encoded_attrs.len,
+                                  privkey,
+                                  algid);
+                SECITEM_FreeItem(&encoded_attrs, PR_FALSE);
+            } else {
+                rv = SGN_Digest(privkey, digestalgtag, &signature,
+                                digests[di]);
+            }
+
+            SECKEY_DestroyPrivateKey(privkey);
+
+            if (rv != SECSuccess)
+                return rv;
+
+            rv = SECITEM_CopyItem(poolp, &(signerinfo->encDigest), &signature);
+            if (rv != SECSuccess)
+                return rv;
+
+            SECITEM_FreeItem(&signature, PR_FALSE);
+
+            rv = SECOID_SetAlgorithmID(poolp, &(signerinfo->digestEncAlg),
+                                       signalgtag, NULL);
+            if (rv != SECSuccess)
+                return SECFailure;
+
+            /*
+             * Count the cert chain for this signer.
+             */
+            if (signerinfo->certList != NULL)
+                certcount += signerinfo->certList->len;
+        }
+    }
+
+    if (certs != NULL) {
+        for (ci = 0; certs[ci] != NULL; ci++)
+            certcount++;
+    }
+
+    if (certlists != NULL) {
+        for (cli = 0; certlists[cli] != NULL; cli++)
+            certcount += certlists[cli]->len;
+    }
+
+    if (certcount == 0)
+        return SECSuccess; /* signing done; no certs */
+
+    /*
+     * Combine all of the certs and cert chains into rawcerts.
+     * Note: certcount is an upper bound; we may not need that many slots
+     * but we will allocate anyway to avoid having to do another pass.
+     * (The temporary space saving is not worth it.)
+     */
+    rawcerts = (SECItem **)PORT_ArenaAlloc(poolp,
+                                           (certcount + 1) * sizeof(SECItem *));
+    if (rawcerts == NULL)
+        return SECFailure;
+
+    /*
+     * XXX Want to check for duplicates and not add *any* cert that is
+     * already in the set.  This will be more important when we start
+     * dealing with larger sets of certs, dual-key certs (signing and
+     * encryption), etc.  For the time being we can slide by...
+     */
+    rci = 0;
+    if (signerinfos != NULL) {
+        for (si = 0; signerinfos[si] != NULL; si++) {
+            signerinfo = signerinfos[si];
+            for (ci = 0; ci < signerinfo->certList->len; ci++)
+                rawcerts[rci++] = &(signerinfo->certList->certs[ci]);
+        }
+    }
+
+    if (certs != NULL) {
+        for (ci = 0; certs[ci] != NULL; ci++)
+            rawcerts[rci++] = &(certs[ci]->derCert);
+    }
+
+    if (certlists != NULL) {
+        for (cli = 0; certlists[cli] != NULL; cli++) {
+            for (ci = 0; ci < certlists[cli]->len; ci++)
+                rawcerts[rci++] = &(certlists[cli]->certs[ci]);
+        }
+    }
+
+    rawcerts[rci] = NULL;
+    *rawcertsp = rawcerts;
+
+    return SECSuccess;
+}
+
+SECStatus
+SEC_PKCS7EncoderFinish(SEC_PKCS7EncoderContext *p7ecx,
+                       SECKEYGetPasswordKey pwfn, void *pwfnarg)
+{
+    SECStatus rv;
+
+    /*
+     * Flush out any remaining data.
+     */
+    rv = sec_pkcs7_encoder_work_data(p7ecx, NULL, NULL, 0, PR_TRUE);
+
+    /*
+     * Turn off streaming stuff.
+     */
+    SEC_ASN1EncoderClearTakeFromBuf(p7ecx->ecx);
+    SEC_ASN1EncoderClearStreaming(p7ecx->ecx);
+
+    if (rv != SECSuccess)
+        goto loser;
+
+    rv = sec_pkcs7_encoder_sig_and_certs(p7ecx->cinfo, pwfn, pwfnarg);
+    if (rv != SECSuccess)
+        goto loser;
+
+    rv = SEC_ASN1EncoderUpdate(p7ecx->ecx, NULL, 0);
+
+loser:
+    SEC_ASN1EncoderFinish(p7ecx->ecx);
+    PORT_Free(p7ecx);
+    return rv;
+}
+
+/*
+ * Abort the ASN.1 stream. Used by pkcs 12
+ */
+void
+SEC_PKCS7EncoderAbort(SEC_PKCS7EncoderContext *p7ecx, int error)
+{
+    PORT_Assert(p7ecx);
+    SEC_ASN1EncoderAbort(p7ecx->ecx, error);
+}
+
+/*
+ * After this routine is called, the entire PKCS7 contentInfo is ready
+ * to be encoded.  This is used internally, but can also be called from
+ * elsewhere for those who want to be able to just have pointers to
+ * the ASN1 template for pkcs7 contentInfo built into their own encodings.
+ */
+SECStatus
+SEC_PKCS7PrepareForEncode(SEC_PKCS7ContentInfo *cinfo,
+                          PK11SymKey *bulkkey,
+                          SECKEYGetPasswordKey pwfn,
+                          void *pwfnarg)
+{
+    SEC_PKCS7EncoderContext *p7ecx;
+    SECItem *content, *enc_content;
+    SECStatus rv;
+
+    p7ecx = sec_pkcs7_encoder_start_contexts(cinfo, bulkkey);
+    if (p7ecx == NULL)
+        return SECFailure;
+
+    content = SEC_PKCS7GetContent(cinfo);
+
+    if (p7ecx->encryptobj != NULL) {
+        SECOidTag kind;
+        SEC_PKCS7EncryptedContentInfo *enccinfo;
+
+        kind = SEC_PKCS7ContentType(p7ecx->cinfo);
+        switch (kind) {
+            default:
+                PORT_Assert(0);
+                rv = SECFailure;
+                goto loser;
+            case SEC_OID_PKCS7_ENCRYPTED_DATA:
+                enccinfo = &(p7ecx->cinfo->content.encryptedData->encContentInfo);
+                break;
+            case SEC_OID_PKCS7_ENVELOPED_DATA:
+                enccinfo = &(p7ecx->cinfo->content.envelopedData->encContentInfo);
+                break;
+            case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA:
+                enccinfo = &(p7ecx->cinfo->content.signedAndEnvelopedData->encContentInfo);
+                break;
+        }
+        enc_content = &(enccinfo->encContent);
+    } else {
+        enc_content = NULL;
+    }
+
+    if (content != NULL && content->data != NULL && content->len) {
+        rv = sec_pkcs7_encoder_work_data(p7ecx, enc_content,
+                                         content->data, content->len, PR_TRUE);
+        if (rv != SECSuccess)
+            goto loser;
+    }
+
+    rv = sec_pkcs7_encoder_sig_and_certs(cinfo, pwfn, pwfnarg);
+
+loser:
+    PORT_Free(p7ecx);
+    return rv;
+}
+
+/*
+ * Encode a PKCS7 object, in one shot.  All necessary components
+ * of the object must already be specified.  Either the data has
+ * already been included (via SetContent), or the data is detached,
+ * or there is no data at all (certs-only).
+ *
+ * "cinfo" specifies the object to be encoded.
+ *
+ * "outputfn" is where the encoded bytes will be passed.
+ *
+ * "outputarg" is an opaque argument to the above callback.
+ *
+ * "bulkkey" specifies the bulk encryption key to use.   This argument
+ * can be NULL if no encryption is being done, or if the bulk key should
+ * be generated internally (usually the case for EnvelopedData but never
+ * for EncryptedData, which *must* provide a bulk encryption key).
+ *
+ * "pwfn" is a callback for getting the password which protects the
+ * private key of the signer.  This argument can be NULL if it is known
+ * that no signing is going to be done.
+ *
+ * "pwfnarg" is an opaque argument to the above callback.
+ */
+SECStatus
+SEC_PKCS7Encode(SEC_PKCS7ContentInfo *cinfo,
+                SEC_PKCS7EncoderOutputCallback outputfn,
+                void *outputarg,
+                PK11SymKey *bulkkey,
+                SECKEYGetPasswordKey pwfn,
+                void *pwfnarg)
+{
+    SECStatus rv;
+
+    rv = SEC_PKCS7PrepareForEncode(cinfo, bulkkey, pwfn, pwfnarg);
+    if (rv == SECSuccess) {
+        struct sec_pkcs7_encoder_output outputcx;
+
+        outputcx.outputfn = outputfn;
+        outputcx.outputarg = outputarg;
+
+        rv = SEC_ASN1Encode(cinfo, sec_PKCS7ContentInfoTemplate,
+                            sec_pkcs7_encoder_out, &outputcx);
+    }
+
+    return rv;
+}
+
+/*
+ * Encode a PKCS7 object, in one shot.  All necessary components
+ * of the object must already be specified.  Either the data has
+ * already been included (via SetContent), or the data is detached,
+ * or there is no data at all (certs-only).  The output, rather than
+ * being passed to an output function as is done above, is all put
+ * into a SECItem.
+ *
+ * "pool" specifies a pool from which to allocate the result.
+ * It can be NULL, in which case memory is allocated generically.
+ *
+ * "dest" specifies a SECItem in which to put the result data.
+ * It can be NULL, in which case the entire item is allocated, too.
+ *
+ * "cinfo" specifies the object to be encoded.
+ *
+ * "bulkkey" specifies the bulk encryption key to use.   This argument
+ * can be NULL if no encryption is being done, or if the bulk key should
+ * be generated internally (usually the case for EnvelopedData but never
+ * for EncryptedData, which *must* provide a bulk encryption key).
+ *
+ * "pwfn" is a callback for getting the password which protects the
+ * private key of the signer.  This argument can be NULL if it is known
+ * that no signing is going to be done.
+ *
+ * "pwfnarg" is an opaque argument to the above callback.
+ */
+SECItem *
+SEC_PKCS7EncodeItem(PLArenaPool *pool,
+                    SECItem *dest,
+                    SEC_PKCS7ContentInfo *cinfo,
+                    PK11SymKey *bulkkey,
+                    SECKEYGetPasswordKey pwfn,
+                    void *pwfnarg)
+{
+    SECStatus rv;
+
+    rv = SEC_PKCS7PrepareForEncode(cinfo, bulkkey, pwfn, pwfnarg);
+    if (rv != SECSuccess)
+        return NULL;
+
+    return SEC_ASN1EncodeItem(pool, dest, cinfo, sec_PKCS7ContentInfoTemplate);
+}
diff --git a/security/nss/lib/pkcs7/p7local.c b/security/nss/lib/pkcs7/p7local.c
new file mode 100644
index 0000000000..94086a684b
--- /dev/null
+++ b/security/nss/lib/pkcs7/p7local.c
@@ -0,0 +1,1309 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * Support routines for PKCS7 implementation, none of which are exported.
+ * This file should only contain things that are needed by both the
+ * encoding/creation side *and* the decoding/decryption side.  Anything
+ * else should be static routines in the appropriate file.
+ */
+
+#include "p7local.h"
+
+#include "cryptohi.h"
+#include "secasn1.h"
+#include "secoid.h"
+#include "secitem.h"
+#include "pk11func.h"
+#include "secpkcs5.h"
+#include "secerr.h"
+
+/*
+ * -------------------------------------------------------------------
+ * Cipher stuff.
+ */
+
+typedef SECStatus (*sec_pkcs7_cipher_function)(void *,
+                                               unsigned char *,
+                                               unsigned *,
+                                               unsigned int,
+                                               const unsigned char *,
+                                               unsigned int);
+typedef SECStatus (*sec_pkcs7_cipher_destroy)(void *, PRBool);
+
+#define BLOCK_SIZE 4096
+
+struct sec_pkcs7_cipher_object {
+    void *cx;
+    sec_pkcs7_cipher_function doit;
+    sec_pkcs7_cipher_destroy destroy;
+    PRBool encrypt;
+    int block_size;
+    int pad_size;
+    int pending_count;
+    unsigned char pending_buf[BLOCK_SIZE];
+};
+
+SEC_ASN1_MKSUB(CERT_IssuerAndSNTemplate)
+SEC_ASN1_MKSUB(CERT_SetOfSignedCrlTemplate)
+SEC_ASN1_MKSUB(SECOID_AlgorithmIDTemplate)
+SEC_ASN1_MKSUB(SEC_OctetStringTemplate)
+SEC_ASN1_MKSUB(SEC_SetOfAnyTemplate)
+
+/*
+ * Create a cipher object to do decryption,  based on the given bulk
+ * encryption key and algorithm identifier (which may include an iv).
+ *
+ * XXX This interface, or one similar, would be really nice available
+ * in general...  I tried to keep the pkcs7-specific stuff (mostly
+ * having to do with padding) out of here.
+ *
+ * XXX Once both are working, it might be nice to combine this and the
+ * function below (for starting up encryption) into one routine, and just
+ * have two simple cover functions which call it.
+ */
+sec_PKCS7CipherObject *
+sec_PKCS7CreateDecryptObject(PK11SymKey *key, SECAlgorithmID *algid)
+{
+    sec_PKCS7CipherObject *result;
+    SECOidTag algtag;
+    void *ciphercx;
+    CK_MECHANISM_TYPE cryptoMechType;
+    PK11SlotInfo *slot;
+    SECItem *param = NULL;
+
+    result = (struct sec_pkcs7_cipher_object *)
+        PORT_ZAlloc(sizeof(struct sec_pkcs7_cipher_object));
+    if (result == NULL)
+        return NULL;
+
+    ciphercx = NULL;
+    algtag = SECOID_GetAlgorithmTag(algid);
+
+    if (SEC_PKCS5IsAlgorithmPBEAlg(algid)) {
+        SECItem *pwitem;
+
+        pwitem = (SECItem *)PK11_GetSymKeyUserData(key);
+        if (!pwitem) {
+            PORT_Free(result);
+            return NULL;
+        }
+
+        cryptoMechType = PK11_GetPBECryptoMechanism(algid, &param, pwitem);
+        if (cryptoMechType == CKM_INVALID_MECHANISM) {
+            PORT_Free(result);
+            SECITEM_FreeItem(param, PR_TRUE);
+            return NULL;
+        }
+    } else {
+        cryptoMechType = PK11_AlgtagToMechanism(algtag);
+        param = PK11_ParamFromAlgid(algid);
+        if (param == NULL) {
+            PORT_Free(result);
+            return NULL;
+        }
+    }
+
+    result->pad_size = PK11_GetBlockSize(cryptoMechType, param);
+    slot = PK11_GetSlotFromKey(key);
+    result->block_size = PK11_IsHW(slot) ? BLOCK_SIZE : result->pad_size;
+    PK11_FreeSlot(slot);
+    ciphercx = PK11_CreateContextBySymKey(cryptoMechType, CKA_DECRYPT,
+                                          key, param);
+    SECITEM_FreeItem(param, PR_TRUE);
+    if (ciphercx == NULL) {
+        PORT_Free(result);
+        return NULL;
+    }
+
+    result->cx = ciphercx;
+    result->doit = (sec_pkcs7_cipher_function)PK11_CipherOp;
+    result->destroy = (sec_pkcs7_cipher_destroy)PK11_DestroyContext;
+    result->encrypt = PR_FALSE;
+    result->pending_count = 0;
+
+    return result;
+}
+
+/*
+ * Create a cipher object to do encryption, based on the given bulk
+ * encryption key and algorithm tag.  Fill in the algorithm identifier
+ * (which may include an iv) appropriately.
+ *
+ * XXX This interface, or one similar, would be really nice available
+ * in general...  I tried to keep the pkcs7-specific stuff (mostly
+ * having to do with padding) out of here.
+ *
+ * XXX Once both are working, it might be nice to combine this and the
+ * function above (for starting up decryption) into one routine, and just
+ * have two simple cover functions which call it.
+ */
+sec_PKCS7CipherObject *
+sec_PKCS7CreateEncryptObject(PLArenaPool *poolp, PK11SymKey *key,
+                             SECOidTag algtag, SECAlgorithmID *algid)
+{
+    sec_PKCS7CipherObject *result;
+    void *ciphercx;
+    SECStatus rv;
+    CK_MECHANISM_TYPE cryptoMechType;
+    PK11SlotInfo *slot;
+    SECItem *param = NULL;
+    PRBool needToEncodeAlgid = PR_FALSE;
+
+    result = (struct sec_pkcs7_cipher_object *)
+        PORT_ZAlloc(sizeof(struct sec_pkcs7_cipher_object));
+    if (result == NULL)
+        return NULL;
+
+    ciphercx = NULL;
+    if (SEC_PKCS5IsAlgorithmPBEAlg(algid)) {
+        SECItem *pwitem;
+
+        pwitem = (SECItem *)PK11_GetSymKeyUserData(key);
+        if (!pwitem) {
+            PORT_Free(result);
+            return NULL;
+        }
+
+        cryptoMechType = PK11_GetPBECryptoMechanism(algid, &param, pwitem);
+        if (cryptoMechType == CKM_INVALID_MECHANISM) {
+            PORT_Free(result);
+            SECITEM_FreeItem(param, PR_TRUE);
+            return NULL;
+        }
+    } else {
+        cryptoMechType = PK11_AlgtagToMechanism(algtag);
+        param = PK11_GenerateNewParam(cryptoMechType, key);
+        if (param == NULL) {
+            PORT_Free(result);
+            return NULL;
+        }
+        needToEncodeAlgid = PR_TRUE;
+    }
+
+    result->pad_size = PK11_GetBlockSize(cryptoMechType, param);
+    slot = PK11_GetSlotFromKey(key);
+    result->block_size = PK11_IsHW(slot) ? BLOCK_SIZE : result->pad_size;
+    PK11_FreeSlot(slot);
+    ciphercx = PK11_CreateContextBySymKey(cryptoMechType, CKA_ENCRYPT,
+                                          key, param);
+    if (ciphercx == NULL) {
+        PORT_Free(result);
+        SECITEM_FreeItem(param, PR_TRUE);
+        return NULL;
+    }
+
+    /*
+     * These are placed after the CreateContextBySymKey() because some
+     * mechanisms have to generate their IVs from their card (i.e. FORTEZZA).
+     * Don't move it from here.
+     */
+    if (needToEncodeAlgid) {
+        rv = PK11_ParamToAlgid(algtag, param, poolp, algid);
+        if (rv != SECSuccess) {
+            PORT_Free(result);
+            SECITEM_FreeItem(param, PR_TRUE);
+            PK11_DestroyContext(ciphercx, PR_TRUE);
+            return NULL;
+        }
+    }
+    SECITEM_FreeItem(param, PR_TRUE);
+
+    result->cx = ciphercx;
+    result->doit = (sec_pkcs7_cipher_function)PK11_CipherOp;
+    result->destroy = (sec_pkcs7_cipher_destroy)PK11_DestroyContext;
+    result->encrypt = PR_TRUE;
+    result->pending_count = 0;
+
+    return result;
+}
+
+/*
+ * Destroy the cipher object.
+ */
+static void
+sec_pkcs7_destroy_cipher(sec_PKCS7CipherObject *obj)
+{
+    (*obj->destroy)(obj->cx, PR_TRUE);
+    PORT_Free(obj);
+}
+
+void
+sec_PKCS7DestroyDecryptObject(sec_PKCS7CipherObject *obj)
+{
+    PORT_Assert(obj != NULL);
+    if (obj == NULL)
+        return;
+    PORT_Assert(!obj->encrypt);
+    sec_pkcs7_destroy_cipher(obj);
+}
+
+void
+sec_PKCS7DestroyEncryptObject(sec_PKCS7CipherObject *obj)
+{
+    PORT_Assert(obj != NULL);
+    if (obj == NULL)
+        return;
+    PORT_Assert(obj->encrypt);
+    sec_pkcs7_destroy_cipher(obj);
+}
+
+/*
+ * XXX I think all of the following lengths should be longs instead
+ * of ints, but our current crypto interface uses ints, so I did too.
+ */
+
+/*
+ * What will be the output length of the next call to decrypt?
+ * Result can be used to perform memory allocations.  Note that the amount
+ * is exactly accurate only when not doing a block cipher or when final
+ * is false, otherwise it is an upper bound on the amount because until
+ * we see the data we do not know how many padding bytes there are
+ * (always between 1 and bsize).
+ *
+ * Note that this can return zero, which does not mean that the decrypt
+ * operation can be skipped!  (It simply means that there are not enough
+ * bytes to make up an entire block; the bytes will be reserved until
+ * there are enough to encrypt/decrypt at least one block.)  However,
+ * if zero is returned it *does* mean that no output buffer need be
+ * passed in to the subsequent decrypt operation, as no output bytes
+ * will be stored.
+ */
+unsigned int
+sec_PKCS7DecryptLength(sec_PKCS7CipherObject *obj, unsigned int input_len,
+                       PRBool final)
+{
+    int blocks, block_size;
+
+    PORT_Assert(!obj->encrypt);
+
+    block_size = obj->block_size;
+
+    /*
+     * If this is not a block cipher, then we always have the same
+     * number of output bytes as we had input bytes.
+     */
+    if (block_size == 0)
+        return input_len;
+
+    /*
+     * On the final call, we will always use up all of the pending
+     * bytes plus all of the input bytes, *but*, there will be padding
+     * at the end and we cannot predict how many bytes of padding we
+     * will end up removing.  The amount given here is actually known
+     * to be at least 1 byte too long (because we know we will have
+     * at least 1 byte of padding), but seemed clearer/better to me.
+     */
+    if (final)
+        return obj->pending_count + input_len;
+
+    /*
+     * Okay, this amount is exactly what we will output on the
+     * next cipher operation.  We will always hang onto the last
+     * 1 - block_size bytes for non-final operations.  That is,
+     * we will do as many complete blocks as we can *except* the
+     * last block (complete or partial).  (This is because until
+     * we know we are at the end, we cannot know when to interpret
+     * and removing the padding byte(s), which are guaranteed to
+     * be there.)
+     */
+    blocks = (obj->pending_count + input_len - 1) / block_size;
+    return blocks * block_size;
+}
+
+/*
+ * What will be the output length of the next call to encrypt?
+ * Result can be used to perform memory allocations.
+ *
+ * Note that this can return zero, which does not mean that the encrypt
+ * operation can be skipped!  (It simply means that there are not enough
+ * bytes to make up an entire block; the bytes will be reserved until
+ * there are enough to encrypt/decrypt at least one block.)  However,
+ * if zero is returned it *does* mean that no output buffer need be
+ * passed in to the subsequent encrypt operation, as no output bytes
+ * will be stored.
+ */
+unsigned int
+sec_PKCS7EncryptLength(sec_PKCS7CipherObject *obj, unsigned int input_len,
+                       PRBool final)
+{
+    int blocks, block_size;
+    int pad_size;
+
+    PORT_Assert(obj->encrypt);
+
+    block_size = obj->block_size;
+    pad_size = obj->pad_size;
+
+    /*
+     * If this is not a block cipher, then we always have the same
+     * number of output bytes as we had input bytes.
+     */
+    if (block_size == 0)
+        return input_len;
+
+    /*
+     * On the final call, we only send out what we need for
+     * remaining bytes plus the padding.  (There is always padding,
+     * so even if we have an exact number of blocks as input, we
+     * will add another full block that is just padding.)
+     */
+    if (final) {
+        if (pad_size == 0) {
+            return obj->pending_count + input_len;
+        } else {
+            blocks = (obj->pending_count + input_len) / pad_size;
+            blocks++;
+            return blocks * pad_size;
+        }
+    }
+
+    /*
+     * Now, count the number of complete blocks of data we have.
+     */
+    blocks = (obj->pending_count + input_len) / block_size;
+
+    return blocks * block_size;
+}
+
+/*
+ * Decrypt a given length of input buffer (starting at "input" and
+ * containing "input_len" bytes), placing the decrypted bytes in
+ * "output" and storing the output length in "*output_len_p".
+ * "obj" is the return value from sec_PKCS7CreateDecryptObject.
+ * When "final" is true, this is the last of the data to be decrypted.
+ *
+ * This is much more complicated than it sounds when the cipher is
+ * a block-type, meaning that the decryption function will only
+ * operate on whole blocks.  But our caller is operating stream-wise,
+ * and can pass in any number of bytes.  So we need to keep track
+ * of block boundaries.  We save excess bytes between calls in "obj".
+ * We also need to determine which bytes are padding, and remove
+ * them from the output.  We can only do this step when we know we
+ * have the final block of data.  PKCS #7 specifies that the padding
+ * used for a block cipher is a string of bytes, each of whose value is
+ * the same as the length of the padding, and that all data is padded.
+ * (Even data that starts out with an exact multiple of blocks gets
+ * added to it another block, all of which is padding.)
+ */
+SECStatus
+sec_PKCS7Decrypt(sec_PKCS7CipherObject *obj, unsigned char *output,
+                 unsigned int *output_len_p, unsigned int max_output_len,
+                 const unsigned char *input, unsigned int input_len,
+                 PRBool final)
+{
+    unsigned int blocks, bsize, pcount, padsize;
+    unsigned int max_needed, ifraglen, ofraglen, output_len;
+    unsigned char *pbuf;
+    SECStatus rv;
+
+    PORT_Assert(!obj->encrypt);
+
+    /*
+     * Check that we have enough room for the output.  Our caller should
+     * already handle this; failure is really an internal error (i.e. bug).
+     */
+    max_needed = sec_PKCS7DecryptLength(obj, input_len, final);
+    PORT_Assert(max_output_len >= max_needed);
+    if (max_output_len < max_needed) {
+        /* PORT_SetError (XXX); */
+        return SECFailure;
+    }
+
+    /*
+     * hardware encryption does not like small decryption sizes here, so we
+     * allow both blocking and padding.
+     */
+    bsize = obj->block_size;
+    padsize = obj->pad_size;
+
+    /*
+     * When no blocking or padding work to do, we can simply call the
+     * cipher function and we are done.
+     */
+    if (bsize == 0) {
+        return (*obj->doit)(obj->cx, output, output_len_p, max_output_len,
+                            input, input_len);
+    }
+
+    pcount = obj->pending_count;
+    pbuf = obj->pending_buf;
+
+    output_len = 0;
+
+    if (pcount) {
+        /*
+         * Try to fill in an entire block, starting with the bytes
+         * we already have saved away.
+         */
+        while (input_len && pcount < bsize) {
+            pbuf[pcount++] = *input++;
+            input_len--;
+        }
+        /*
+         * If we have at most a whole block and this is not our last call,
+         * then we are done for now.  (We do not try to decrypt a lone
+         * single block because we cannot interpret the padding bytes
+         * until we know we are handling the very last block of all input.)
+         */
+        if (input_len == 0 && !final) {
+            obj->pending_count = pcount;
+            if (output_len_p)
+                *output_len_p = 0;
+            return SECSuccess;
+        }
+        /*
+         * Given the logic above, we expect to have a full block by now.
+         * If we do not, there is something wrong, either with our own
+         * logic or with (length of) the data given to us.
+         */
+        if ((padsize != 0) && (pcount % padsize) != 0) {
+            PORT_Assert(final);
+            PORT_SetError(SEC_ERROR_BAD_DATA);
+            return SECFailure;
+        }
+        /*
+         * Decrypt the block.
+         */
+        rv = (*obj->doit)(obj->cx, output, &ofraglen, max_output_len,
+                          pbuf, pcount);
+        if (rv != SECSuccess)
+            return rv;
+
+        /*
+         * For now anyway, all of our ciphers have the same number of
+         * bytes of output as they do input.  If this ever becomes untrue,
+         * then sec_PKCS7DecryptLength needs to be made smarter!
+         */
+        PORT_Assert(ofraglen == pcount);
+
+        /*
+         * Account for the bytes now in output.
+         */
+        max_output_len -= ofraglen;
+        output_len += ofraglen;
+        output += ofraglen;
+    }
+
+    /*
+     * If this is our last call, we expect to have an exact number of
+     * blocks left to be decrypted; we will decrypt them all.
+     *
+     * If not our last call, we always save between 1 and bsize bytes
+     * until next time.  (We must do this because we cannot be sure
+     * that none of the decrypted bytes are padding bytes until we
+     * have at least another whole block of data.  You cannot tell by
+     * looking -- the data could be anything -- you can only tell by
+     * context, knowing you are looking at the last block.)  We could
+     * decrypt a whole block now but it is easier if we just treat it
+     * the same way we treat partial block bytes.
+     */
+    if (final) {
+        if (padsize) {
+            blocks = input_len / padsize;
+            ifraglen = blocks * padsize;
+        } else
+            ifraglen = input_len;
+        PORT_Assert(ifraglen == input_len);
+
+        if (ifraglen != input_len) {
+            PORT_SetError(SEC_ERROR_BAD_DATA);
+            return SECFailure;
+        }
+    } else {
+        blocks = (input_len - 1) / bsize;
+        ifraglen = blocks * bsize;
+        PORT_Assert(ifraglen < input_len);
+
+        pcount = input_len - ifraglen;
+        PORT_Memcpy(pbuf, input + ifraglen, pcount);
+        obj->pending_count = pcount;
+    }
+
+    if (ifraglen) {
+        rv = (*obj->doit)(obj->cx, output, &ofraglen, max_output_len,
+                          input, ifraglen);
+        if (rv != SECSuccess)
+            return rv;
+
+        /*
+         * For now anyway, all of our ciphers have the same number of
+         * bytes of output as they do input.  If this ever becomes untrue,
+         * then sec_PKCS7DecryptLength needs to be made smarter!
+         */
+        PORT_Assert(ifraglen == ofraglen);
+        if (ifraglen != ofraglen) {
+            PORT_SetError(SEC_ERROR_BAD_DATA);
+            return SECFailure;
+        }
+
+        output_len += ofraglen;
+    } else {
+        ofraglen = 0;
+    }
+
+    /*
+     * If we just did our very last block, "remove" the padding by
+     * adjusting the output length.
+     */
+    if (final && (padsize != 0)) {
+        unsigned int padlen = *(output + ofraglen - 1);
+        if (padlen == 0 || padlen > padsize) {
+            PORT_SetError(SEC_ERROR_BAD_DATA);
+            return SECFailure;
+        }
+        output_len -= padlen;
+    }
+
+    PORT_Assert(output_len_p != NULL || output_len == 0);
+    if (output_len_p != NULL)
+        *output_len_p = output_len;
+
+    return SECSuccess;
+}
+
+/*
+ * Encrypt a given length of input buffer (starting at "input" and
+ * containing "input_len" bytes), placing the encrypted bytes in
+ * "output" and storing the output length in "*output_len_p".
+ * "obj" is the return value from sec_PKCS7CreateEncryptObject.
+ * When "final" is true, this is the last of the data to be encrypted.
+ *
+ * This is much more complicated than it sounds when the cipher is
+ * a block-type, meaning that the encryption function will only
+ * operate on whole blocks.  But our caller is operating stream-wise,
+ * and can pass in any number of bytes.  So we need to keep track
+ * of block boundaries.  We save excess bytes between calls in "obj".
+ * We also need to add padding bytes at the end.  PKCS #7 specifies
+ * that the padding used for a block cipher is a string of bytes,
+ * each of whose value is the same as the length of the padding,
+ * and that all data is padded.  (Even data that starts out with
+ * an exact multiple of blocks gets added to it another block,
+ * all of which is padding.)
+ *
+ * XXX I would kind of like to combine this with the function above
+ * which does decryption, since they have a lot in common.  But the
+ * tricky parts about padding and filling blocks would be much
+ * harder to read that way, so I left them separate.  At least for
+ * now until it is clear that they are right.
+ */
+SECStatus
+sec_PKCS7Encrypt(sec_PKCS7CipherObject *obj, unsigned char *output,
+                 unsigned int *output_len_p, unsigned int max_output_len,
+                 const unsigned char *input, unsigned int input_len,
+                 PRBool final)
+{
+    int blocks, bsize, padlen, pcount, padsize;
+    unsigned int max_needed, ifraglen, ofraglen, output_len;
+    unsigned char *pbuf;
+    SECStatus rv;
+
+    PORT_Assert(obj->encrypt);
+
+    /*
+     * Check that we have enough room for the output.  Our caller should
+     * already handle this; failure is really an internal error (i.e. bug).
+     */
+    max_needed = sec_PKCS7EncryptLength(obj, input_len, final);
+    PORT_Assert(max_output_len >= max_needed);
+    if (max_output_len < max_needed) {
+        /* PORT_SetError (XXX); */
+        return SECFailure;
+    }
+
+    bsize = obj->block_size;
+    padsize = obj->pad_size;
+
+    /*
+     * When no blocking and padding work to do, we can simply call the
+     * cipher function and we are done.
+     */
+    if (bsize == 0) {
+        return (*obj->doit)(obj->cx, output, output_len_p, max_output_len,
+                            input, input_len);
+    }
+
+    pcount = obj->pending_count;
+    pbuf = obj->pending_buf;
+
+    output_len = 0;
+
+    if (pcount) {
+        /*
+         * Try to fill in an entire block, starting with the bytes
+         * we already have saved away.
+         */
+        while (input_len && pcount < bsize) {
+            pbuf[pcount++] = *input++;
+            input_len--;
+        }
+        /*
+         * If we do not have a full block and we know we will be
+         * called again, then we are done for now.
+         */
+        if (pcount < bsize && !final) {
+            obj->pending_count = pcount;
+            if (output_len_p != NULL)
+                *output_len_p = 0;
+            return SECSuccess;
+        }
+        /*
+         * If we have a whole block available, encrypt it.
+         */
+        if ((padsize == 0) || (pcount % padsize) == 0) {
+            rv = (*obj->doit)(obj->cx, output, &ofraglen, max_output_len,
+                              pbuf, pcount);
+            if (rv != SECSuccess)
+                return rv;
+
+            /*
+             * For now anyway, all of our ciphers have the same number of
+             * bytes of output as they do input.  If this ever becomes untrue,
+             * then sec_PKCS7EncryptLength needs to be made smarter!
+             */
+            PORT_Assert(ofraglen == pcount);
+
+            /*
+             * Account for the bytes now in output.
+             */
+            max_output_len -= ofraglen;
+            output_len += ofraglen;
+            output += ofraglen;
+
+            pcount = 0;
+        }
+    }
+
+    if (input_len) {
+        PORT_Assert(pcount == 0);
+
+        blocks = input_len / bsize;
+        ifraglen = blocks * bsize;
+
+        if (ifraglen) {
+            rv = (*obj->doit)(obj->cx, output, &ofraglen, max_output_len,
+                              input, ifraglen);
+            if (rv != SECSuccess)
+                return rv;
+
+            /*
+             * For now anyway, all of our ciphers have the same number of
+             * bytes of output as they do input.  If this ever becomes untrue,
+             * then sec_PKCS7EncryptLength needs to be made smarter!
+             */
+            PORT_Assert(ifraglen == ofraglen);
+
+            max_output_len -= ofraglen;
+            output_len += ofraglen;
+            output += ofraglen;
+        }
+
+        pcount = input_len - ifraglen;
+        PORT_Assert(pcount < bsize);
+        if (pcount)
+            PORT_Memcpy(pbuf, input + ifraglen, pcount);
+    }
+
+    if (final) {
+        if (padsize) {
+            padlen = padsize - (pcount % padsize);
+            PORT_Memset(pbuf + pcount, padlen, padlen);
+        } else {
+            padlen = 0;
+        }
+        rv = (*obj->doit)(obj->cx, output, &ofraglen, max_output_len,
+                          pbuf, pcount + padlen);
+        if (rv != SECSuccess)
+            return rv;
+
+        /*
+         * For now anyway, all of our ciphers have the same number of
+         * bytes of output as they do input.  If this ever becomes untrue,
+         * then sec_PKCS7EncryptLength needs to be made smarter!
+         */
+        PORT_Assert(ofraglen == (pcount + padlen));
+        output_len += ofraglen;
+    } else {
+        obj->pending_count = pcount;
+    }
+
+    PORT_Assert(output_len_p != NULL || output_len == 0);
+    if (output_len_p != NULL)
+        *output_len_p = output_len;
+
+    return SECSuccess;
+}
+
+/*
+ * End of cipher stuff.
+ * -------------------------------------------------------------------
+ */
+
+/*
+ * -------------------------------------------------------------------
+ * XXX The following Attribute stuff really belongs elsewhere.
+ * The Attribute type is *not* part of pkcs7 but rather X.501.
+ * But for now, since PKCS7 is the only customer of attributes,
+ * we define them here.  Once there is a use outside of PKCS7,
+ * then change the attribute types and functions from internal
+ * to external naming convention, and move them elsewhere!
+ */
+
+/*
+ * Look through a set of attributes and find one that matches the
+ * specified object ID.  If "only" is true, then make sure that
+ * there is not more than one attribute of the same type.  Otherwise,
+ * just return the first one found. (XXX Does anybody really want
+ * that first-found behavior?  It was like that when I found it...)
+ */
+SEC_PKCS7Attribute *
+sec_PKCS7FindAttribute(SEC_PKCS7Attribute **attrs, SECOidTag oidtag,
+                       PRBool only)
+{
+    SECOidData *oid;
+    SEC_PKCS7Attribute *attr1, *attr2;
+
+    if (attrs == NULL)
+        return NULL;
+
+    oid = SECOID_FindOIDByTag(oidtag);
+    if (oid == NULL)
+        return NULL;
+
+    while ((attr1 = *attrs++) != NULL) {
+        if (attr1->type.len == oid->oid.len && PORT_Memcmp(attr1->type.data, oid->oid.data, oid->oid.len) == 0)
+            break;
+    }
+
+    if (attr1 == NULL)
+        return NULL;
+
+    if (!only)
+        return attr1;
+
+    while ((attr2 = *attrs++) != NULL) {
+        if (attr2->type.len == oid->oid.len && PORT_Memcmp(attr2->type.data, oid->oid.data, oid->oid.len) == 0)
+            break;
+    }
+
+    if (attr2 != NULL)
+        return NULL;
+
+    return attr1;
+}
+
+/*
+ * Return the single attribute value, doing some sanity checking first:
+ * - Multiple values are *not* expected.
+ * - Empty values are *not* expected.
+ */
+SECItem *
+sec_PKCS7AttributeValue(SEC_PKCS7Attribute *attr)
+{
+    SECItem *value;
+
+    if (attr == NULL)
+        return NULL;
+
+    value = attr->values[0];
+
+    if (value == NULL || value->data == NULL || value->len == 0)
+        return NULL;
+
+    if (attr->values[1] != NULL)
+        return NULL;
+
+    return value;
+}
+
+static const SEC_ASN1Template *
+sec_attr_choose_attr_value_template(void *src_or_dest, PRBool encoding)
+{
+    const SEC_ASN1Template *theTemplate;
+
+    SEC_PKCS7Attribute *attribute;
+    SECOidData *oiddata;
+    PRBool encoded;
+
+    PORT_Assert(src_or_dest != NULL);
+    if (src_or_dest == NULL)
+        return NULL;
+
+    attribute = (SEC_PKCS7Attribute *)src_or_dest;
+
+    if (encoding && attribute->encoded)
+        return SEC_ASN1_GET(SEC_AnyTemplate);
+
+    oiddata = attribute->typeTag;
+    if (oiddata == NULL) {
+        oiddata = SECOID_FindOID(&attribute->type);
+        attribute->typeTag = oiddata;
+    }
+
+    if (oiddata == NULL) {
+        encoded = PR_TRUE;
+        theTemplate = SEC_ASN1_GET(SEC_AnyTemplate);
+    } else {
+        switch (oiddata->offset) {
+            default:
+                encoded = PR_TRUE;
+                theTemplate = SEC_ASN1_GET(SEC_AnyTemplate);
+                break;
+            case SEC_OID_PKCS9_EMAIL_ADDRESS:
+            case SEC_OID_RFC1274_MAIL:
+            case SEC_OID_PKCS9_UNSTRUCTURED_NAME:
+                encoded = PR_FALSE;
+                theTemplate = SEC_ASN1_GET(SEC_IA5StringTemplate);
+                break;
+            case SEC_OID_PKCS9_CONTENT_TYPE:
+                encoded = PR_FALSE;
+                theTemplate = SEC_ASN1_GET(SEC_ObjectIDTemplate);
+                break;
+            case SEC_OID_PKCS9_MESSAGE_DIGEST:
+                encoded = PR_FALSE;
+                theTemplate = SEC_ASN1_GET(SEC_OctetStringTemplate);
+                break;
+            case SEC_OID_PKCS9_SIGNING_TIME:
+                encoded = PR_FALSE;
+                theTemplate = SEC_ASN1_GET(CERT_TimeChoiceTemplate);
+                break;
+                /* XXX Want other types here, too */
+        }
+    }
+
+    if (encoding) {
+        /*
+         * If we are encoding and we think we have an already-encoded value,
+         * then the code which initialized this attribute should have set
+         * the "encoded" property to true (and we would have returned early,
+         * up above).  No devastating error, but that code should be fixed.
+         * (It could indicate that the resulting encoded bytes are wrong.)
+         */
+        PORT_Assert(!encoded);
+    } else {
+        /*
+         * We are decoding; record whether the resulting value is
+         * still encoded or not.
+         */
+        attribute->encoded = encoded;
+    }
+    return theTemplate;
+}
+
+static const SEC_ASN1TemplateChooserPtr sec_attr_chooser = sec_attr_choose_attr_value_template;
+
+static const SEC_ASN1Template sec_pkcs7_attribute_template[] = {
+    { SEC_ASN1_SEQUENCE,
+      0, NULL, sizeof(SEC_PKCS7Attribute) },
+    { SEC_ASN1_OBJECT_ID,
+      offsetof(SEC_PKCS7Attribute, type) },
+    { SEC_ASN1_DYNAMIC | SEC_ASN1_SET_OF,
+      offsetof(SEC_PKCS7Attribute, values),
+      &sec_attr_chooser },
+    { 0 }
+};
+
+static const SEC_ASN1Template sec_pkcs7_set_of_attribute_template[] = {
+    { SEC_ASN1_SET_OF, 0, sec_pkcs7_attribute_template },
+};
+
+/*
+ * If you are wondering why this routine does not reorder the attributes
+ * first, and might be tempted to make it do so, see the comment by the
+ * call to ReorderAttributes in p7encode.c.  (Or, see who else calls this
+ * and think long and hard about the implications of making it always
+ * do the reordering.)
+ */
+SECItem *
+sec_PKCS7EncodeAttributes(PLArenaPool *poolp, SECItem *dest, void *src)
+{
+    return SEC_ASN1EncodeItem(poolp, dest, src,
+                              sec_pkcs7_set_of_attribute_template);
+}
+
+/*
+ * Make sure that the order of the attributes guarantees valid DER
+ * (which must be in lexigraphically ascending order for a SET OF);
+ * if reordering is necessary it will be done in place (in attrs).
+ */
+SECStatus
+sec_PKCS7ReorderAttributes(SEC_PKCS7Attribute **attrs)
+{
+    PLArenaPool *poolp;
+    int num_attrs, i, pass, besti;
+    unsigned int j;
+    SECItem **enc_attrs;
+    SEC_PKCS7Attribute **new_attrs;
+
+    /*
+     * I think we should not be called with NULL.  But if we are,
+     * call it a success anyway, because the order *is* okay.
+     */
+    PORT_Assert(attrs != NULL);
+    if (attrs == NULL)
+        return SECSuccess;
+
+    /*
+     * Count how many attributes we are dealing with here.
+     */
+    num_attrs = 0;
+    while (attrs[num_attrs] != NULL)
+        num_attrs++;
+
+    /*
+     * Again, I think we should have some attributes here.
+     * But if we do not, or if there is only one, then call it
+     * a success because it also already has a fine order.
+     */
+    PORT_Assert(num_attrs);
+    if (num_attrs == 0 || num_attrs == 1)
+        return SECSuccess;
+
+    /*
+     * Allocate an arena for us to work with, so it is easy to
+     * clean up all of the memory (fairly small pieces, really).
+     */
+    poolp = PORT_NewArena(1024); /* XXX what is right value? */
+    if (poolp == NULL)
+        return SECFailure; /* no memory; nothing we can do... */
+
+    /*
+     * Allocate arrays to hold the individual encodings which we will use
+     * for comparisons and the reordered attributes as they are sorted.
+     */
+    enc_attrs = (SECItem **)PORT_ArenaZAlloc(poolp, num_attrs * sizeof(SECItem *));
+    new_attrs = (SEC_PKCS7Attribute **)PORT_ArenaZAlloc(poolp,
+                                                        num_attrs * sizeof(SEC_PKCS7Attribute *));
+    if (enc_attrs == NULL || new_attrs == NULL) {
+        PORT_FreeArena(poolp, PR_FALSE);
+        return SECFailure;
+    }
+
+    /*
+     * DER encode each individual attribute.
+     */
+    for (i = 0; i < num_attrs; i++) {
+        enc_attrs[i] = SEC_ASN1EncodeItem(poolp, NULL, attrs[i],
+                                          sec_pkcs7_attribute_template);
+        if (enc_attrs[i] == NULL) {
+            PORT_FreeArena(poolp, PR_FALSE);
+            return SECFailure;
+        }
+    }
+
+    /*
+     * Now compare and sort them; this is not the most efficient sorting
+     * method, but it is just fine for the problem at hand, because the
+     * number of attributes is (always) going to be small.
+     */
+    for (pass = 0; pass < num_attrs; pass++) {
+        /*
+         * Find the first not-yet-accepted attribute.  (Once one is
+         * sorted into the other array, it is cleared from enc_attrs.)
+         */
+        for (i = 0; i < num_attrs; i++) {
+            if (enc_attrs[i] != NULL)
+                break;
+        }
+        PORT_Assert(i < num_attrs);
+        besti = i;
+
+        /*
+         * Find the lowest (lexigraphically) encoding.  One that is
+         * shorter than all the rest is known to be "less" because each
+         * attribute is of the same type (a SEQUENCE) and so thus the
+         * first octet of each is the same, and the second octet is
+         * the length (or the length of the length with the high bit
+         * set, followed by the length, which also works out to always
+         * order the shorter first).  Two (or more) that have the
+         * same length need to be compared byte by byte until a mismatch
+         * is found.
+         */
+        for (i = besti + 1; i < num_attrs; i++) {
+            if (enc_attrs[i] == NULL) /* slot already handled */
+                continue;
+
+            if (enc_attrs[i]->len != enc_attrs[besti]->len) {
+                if (enc_attrs[i]->len < enc_attrs[besti]->len)
+                    besti = i;
+                continue;
+            }
+
+            for (j = 0; j < enc_attrs[i]->len; j++) {
+                if (enc_attrs[i]->data[j] < enc_attrs[besti]->data[j]) {
+                    besti = i;
+                    break;
+                }
+            }
+
+            /*
+             * For this not to be true, we would have to have encountered
+             * two *identical* attributes, which I think we should not see.
+             * So assert if it happens, but even if it does, let it go
+             * through; the ordering of the two does not matter.
+             */
+            PORT_Assert(j < enc_attrs[i]->len);
+        }
+
+        /*
+         * Now we have found the next-lowest one; copy it over and
+         * remove it from enc_attrs.
+         */
+        new_attrs[pass] = attrs[besti];
+        enc_attrs[besti] = NULL;
+    }
+
+    /*
+     * Now new_attrs has the attributes in the order we want;
+     * copy them back into the attrs array we started with.
+     */
+    for (i = 0; i < num_attrs; i++)
+        attrs[i] = new_attrs[i];
+
+    PORT_FreeArena(poolp, PR_FALSE);
+    return SECSuccess;
+}
+
+/*
+ * End of attribute stuff.
+ * -------------------------------------------------------------------
+ */
+
+/*
+ * Templates and stuff.  Keep these at the end of the file.
+ */
+
+/* forward declaration */
+static const SEC_ASN1Template *
+sec_pkcs7_choose_content_template(void *src_or_dest, PRBool encoding);
+
+static const SEC_ASN1TemplateChooserPtr sec_pkcs7_chooser = sec_pkcs7_choose_content_template;
+
+const SEC_ASN1Template sec_PKCS7ContentInfoTemplate[] = {
+    { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
+      0, NULL, sizeof(SEC_PKCS7ContentInfo) },
+    { SEC_ASN1_OBJECT_ID,
+      offsetof(SEC_PKCS7ContentInfo, contentType) },
+    { SEC_ASN1_OPTIONAL | SEC_ASN1_DYNAMIC | SEC_ASN1_MAY_STREAM | SEC_ASN1_EXPLICIT | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 0,
+      offsetof(SEC_PKCS7ContentInfo, content),
+      &sec_pkcs7_chooser },
+    { 0 }
+};
+
+/* XXX These names should change from external to internal convention. */
+
+static const SEC_ASN1Template SEC_PKCS7SignerInfoTemplate[] = {
+    { SEC_ASN1_SEQUENCE,
+      0, NULL, sizeof(SEC_PKCS7SignerInfo) },
+    { SEC_ASN1_INTEGER,
+      offsetof(SEC_PKCS7SignerInfo, version) },
+    { SEC_ASN1_POINTER | SEC_ASN1_XTRN,
+      offsetof(SEC_PKCS7SignerInfo, issuerAndSN),
+      SEC_ASN1_SUB(CERT_IssuerAndSNTemplate) },
+    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
+      offsetof(SEC_PKCS7SignerInfo, digestAlg),
+      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
+    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 0,
+      offsetof(SEC_PKCS7SignerInfo, authAttr),
+      sec_pkcs7_set_of_attribute_template },
+    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
+      offsetof(SEC_PKCS7SignerInfo, digestEncAlg),
+      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
+    { SEC_ASN1_OCTET_STRING,
+      offsetof(SEC_PKCS7SignerInfo, encDigest) },
+    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC | 1,
+      offsetof(SEC_PKCS7SignerInfo, unAuthAttr),
+      sec_pkcs7_set_of_attribute_template },
+    { 0 }
+};
+
+static const SEC_ASN1Template SEC_PKCS7SignedDataTemplate[] = {
+    { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
+      0, NULL, sizeof(SEC_PKCS7SignedData) },
+    { SEC_ASN1_INTEGER,
+      offsetof(SEC_PKCS7SignedData, version) },
+    { SEC_ASN1_SET_OF | SEC_ASN1_XTRN,
+      offsetof(SEC_PKCS7SignedData, digestAlgorithms),
+      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
+    { SEC_ASN1_INLINE,
+      offsetof(SEC_PKCS7SignedData, contentInfo),
+      sec_PKCS7ContentInfoTemplate },
+    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC |
+          SEC_ASN1_XTRN | 0,
+      offsetof(SEC_PKCS7SignedData, rawCerts),
+      SEC_ASN1_SUB(SEC_SetOfAnyTemplate) },
+    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC |
+          SEC_ASN1_XTRN | 1,
+      offsetof(SEC_PKCS7SignedData, crls),
+      SEC_ASN1_SUB(CERT_SetOfSignedCrlTemplate) },
+    { SEC_ASN1_SET_OF,
+      offsetof(SEC_PKCS7SignedData, signerInfos),
+      SEC_PKCS7SignerInfoTemplate },
+    { 0 }
+};
+
+static const SEC_ASN1Template SEC_PointerToPKCS7SignedDataTemplate[] = {
+    { SEC_ASN1_POINTER, 0, SEC_PKCS7SignedDataTemplate }
+};
+
+static const SEC_ASN1Template SEC_PKCS7RecipientInfoTemplate[] = {
+    { SEC_ASN1_SEQUENCE,
+      0, NULL, sizeof(SEC_PKCS7RecipientInfo) },
+    { SEC_ASN1_INTEGER,
+      offsetof(SEC_PKCS7RecipientInfo, version) },
+    { SEC_ASN1_POINTER | SEC_ASN1_XTRN,
+      offsetof(SEC_PKCS7RecipientInfo, issuerAndSN),
+      SEC_ASN1_SUB(CERT_IssuerAndSNTemplate) },
+    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
+      offsetof(SEC_PKCS7RecipientInfo, keyEncAlg),
+      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
+    { SEC_ASN1_OCTET_STRING,
+      offsetof(SEC_PKCS7RecipientInfo, encKey) },
+    { 0 }
+};
+
+static const SEC_ASN1Template SEC_PKCS7EncryptedContentInfoTemplate[] = {
+    { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
+      0, NULL, sizeof(SEC_PKCS7EncryptedContentInfo) },
+    { SEC_ASN1_OBJECT_ID,
+      offsetof(SEC_PKCS7EncryptedContentInfo, contentType) },
+    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
+      offsetof(SEC_PKCS7EncryptedContentInfo, contentEncAlg),
+      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
+    { SEC_ASN1_OPTIONAL | SEC_ASN1_MAY_STREAM | SEC_ASN1_CONTEXT_SPECIFIC |
+          SEC_ASN1_XTRN | 0,
+      offsetof(SEC_PKCS7EncryptedContentInfo, encContent),
+      SEC_ASN1_SUB(SEC_OctetStringTemplate) },
+    { 0 }
+};
+
+static const SEC_ASN1Template SEC_PKCS7EnvelopedDataTemplate[] = {
+    { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
+      0, NULL, sizeof(SEC_PKCS7EnvelopedData) },
+    { SEC_ASN1_INTEGER,
+      offsetof(SEC_PKCS7EnvelopedData, version) },
+    { SEC_ASN1_SET_OF,
+      offsetof(SEC_PKCS7EnvelopedData, recipientInfos),
+      SEC_PKCS7RecipientInfoTemplate },
+    { SEC_ASN1_INLINE,
+      offsetof(SEC_PKCS7EnvelopedData, encContentInfo),
+      SEC_PKCS7EncryptedContentInfoTemplate },
+    { 0 }
+};
+
+static const SEC_ASN1Template SEC_PointerToPKCS7EnvelopedDataTemplate[] = {
+    { SEC_ASN1_POINTER, 0, SEC_PKCS7EnvelopedDataTemplate }
+};
+
+static const SEC_ASN1Template SEC_PKCS7SignedAndEnvelopedDataTemplate[] = {
+    { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
+      0, NULL, sizeof(SEC_PKCS7SignedAndEnvelopedData) },
+    { SEC_ASN1_INTEGER,
+      offsetof(SEC_PKCS7SignedAndEnvelopedData, version) },
+    { SEC_ASN1_SET_OF,
+      offsetof(SEC_PKCS7SignedAndEnvelopedData, recipientInfos),
+      SEC_PKCS7RecipientInfoTemplate },
+    { SEC_ASN1_SET_OF | SEC_ASN1_XTRN,
+      offsetof(SEC_PKCS7SignedAndEnvelopedData, digestAlgorithms),
+      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
+    { SEC_ASN1_INLINE,
+      offsetof(SEC_PKCS7SignedAndEnvelopedData, encContentInfo),
+      SEC_PKCS7EncryptedContentInfoTemplate },
+    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC |
+          SEC_ASN1_XTRN | 0,
+      offsetof(SEC_PKCS7SignedAndEnvelopedData, rawCerts),
+      SEC_ASN1_SUB(SEC_SetOfAnyTemplate) },
+    { SEC_ASN1_OPTIONAL | SEC_ASN1_CONSTRUCTED | SEC_ASN1_CONTEXT_SPECIFIC |
+          SEC_ASN1_XTRN | 1,
+      offsetof(SEC_PKCS7SignedAndEnvelopedData, crls),
+      SEC_ASN1_SUB(CERT_SetOfSignedCrlTemplate) },
+    { SEC_ASN1_SET_OF,
+      offsetof(SEC_PKCS7SignedAndEnvelopedData, signerInfos),
+      SEC_PKCS7SignerInfoTemplate },
+    { 0 }
+};
+
+static const SEC_ASN1Template
+    SEC_PointerToPKCS7SignedAndEnvelopedDataTemplate[] = {
+        { SEC_ASN1_POINTER, 0, SEC_PKCS7SignedAndEnvelopedDataTemplate }
+    };
+
+static const SEC_ASN1Template SEC_PKCS7DigestedDataTemplate[] = {
+    { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
+      0, NULL, sizeof(SEC_PKCS7DigestedData) },
+    { SEC_ASN1_INTEGER,
+      offsetof(SEC_PKCS7DigestedData, version) },
+    { SEC_ASN1_INLINE | SEC_ASN1_XTRN,
+      offsetof(SEC_PKCS7DigestedData, digestAlg),
+      SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate) },
+    { SEC_ASN1_INLINE,
+      offsetof(SEC_PKCS7DigestedData, contentInfo),
+      sec_PKCS7ContentInfoTemplate },
+    { SEC_ASN1_OCTET_STRING,
+      offsetof(SEC_PKCS7DigestedData, digest) },
+    { 0 }
+};
+
+static const SEC_ASN1Template SEC_PointerToPKCS7DigestedDataTemplate[] = {
+    { SEC_ASN1_POINTER, 0, SEC_PKCS7DigestedDataTemplate }
+};
+
+static const SEC_ASN1Template SEC_PKCS7EncryptedDataTemplate[] = {
+    { SEC_ASN1_SEQUENCE | SEC_ASN1_MAY_STREAM,
+      0, NULL, sizeof(SEC_PKCS7EncryptedData) },
+    { SEC_ASN1_INTEGER,
+      offsetof(SEC_PKCS7EncryptedData, version) },
+    { SEC_ASN1_INLINE,
+      offsetof(SEC_PKCS7EncryptedData, encContentInfo),
+      SEC_PKCS7EncryptedContentInfoTemplate },
+    { 0 }
+};
+
+static const SEC_ASN1Template SEC_PointerToPKCS7EncryptedDataTemplate[] = {
+    { SEC_ASN1_POINTER, 0, SEC_PKCS7EncryptedDataTemplate }
+};
+
+static const SEC_ASN1Template *
+sec_pkcs7_choose_content_template(void *src_or_dest, PRBool encoding)
+{
+    const SEC_ASN1Template *theTemplate;
+    SEC_PKCS7ContentInfo *cinfo;
+    SECOidTag kind;
+
+    PORT_Assert(src_or_dest != NULL);
+    if (src_or_dest == NULL)
+        return NULL;
+
+    cinfo = (SEC_PKCS7ContentInfo *)src_or_dest;
+    kind = SEC_PKCS7ContentType(cinfo);
+    switch (kind) {
+        default:
+            theTemplate = SEC_ASN1_GET(SEC_PointerToAnyTemplate);
+            break;
+        case SEC_OID_PKCS7_DATA:
+            theTemplate = SEC_ASN1_GET(SEC_PointerToOctetStringTemplate);
+            break;
+        case SEC_OID_PKCS7_SIGNED_DATA:
+            theTemplate = SEC_PointerToPKCS7SignedDataTemplate;
+            break;
+        case SEC_OID_PKCS7_ENVELOPED_DATA:
+            theTemplate = SEC_PointerToPKCS7EnvelopedDataTemplate;
+            break;
+        case SEC_OID_PKCS7_SIGNED_ENVELOPED_DATA:
+            theTemplate = SEC_PointerToPKCS7SignedAndEnvelopedDataTemplate;
+            break;
+        case SEC_OID_PKCS7_DIGESTED_DATA:
+            theTemplate = SEC_PointerToPKCS7DigestedDataTemplate;
+            break;
+        case SEC_OID_PKCS7_ENCRYPTED_DATA:
+            theTemplate = SEC_PointerToPKCS7EncryptedDataTemplate;
+            break;
+    }
+    return theTemplate;
+}
+
+/*
+ * End of templates.  Do not add stuff after this; put new code
+ * up above the start of the template definitions.
+ */
diff --git a/security/nss/lib/pkcs7/p7local.h b/security/nss/lib/pkcs7/p7local.h
new file mode 100644
index 0000000000..ad37c3aad6
--- /dev/null
+++ b/security/nss/lib/pkcs7/p7local.h
@@ -0,0 +1,137 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * Support routines for PKCS7 implementation, none of which are exported.
+ * This file should only contain things that are needed by both the
+ * encoding/creation side *and* the decoding/decryption side.  Anything
+ * else should just be static routines in the appropriate file.
+ *
+ * Do not export this file!  If something in here is really needed outside
+ * of pkcs7 code, first try to add a PKCS7 interface which will do it for
+ * you.  If that has a problem, then just move out what you need, changing
+ * its name as appropriate!
+ */
+
+#ifndef _P7LOCAL_H_
+#define _P7LOCAL_H_
+
+#include "secpkcs7.h"
+#include "secasn1t.h"
+
+extern const SEC_ASN1Template sec_PKCS7ContentInfoTemplate[];
+
+/* opaque objects */
+typedef struct sec_pkcs7_cipher_object sec_PKCS7CipherObject;
+
+/************************************************************************/
+SEC_BEGIN_PROTOS
+
+/*
+ * Look through a set of attributes and find one that matches the
+ * specified object ID.  If "only" is true, then make sure that
+ * there is not more than one attribute of the same type.  Otherwise,
+ * just return the first one found. (XXX Does anybody really want
+ * that first-found behavior?  It was like that when I found it...)
+ */
+extern SEC_PKCS7Attribute *sec_PKCS7FindAttribute(SEC_PKCS7Attribute **attrs,
+                                                  SECOidTag oidtag,
+                                                  PRBool only);
+/*
+ * Return the single attribute value, doing some sanity checking first:
+ * - Multiple values are *not* expected.
+ * - Empty values are *not* expected.
+ */
+extern SECItem *sec_PKCS7AttributeValue(SEC_PKCS7Attribute *attr);
+
+/*
+ * Encode a set of attributes (found in "src").
+ */
+extern SECItem *sec_PKCS7EncodeAttributes(PLArenaPool *poolp,
+                                          SECItem *dest, void *src);
+
+/*
+ * Make sure that the order of the attributes guarantees valid DER
+ * (which must be in lexigraphically ascending order for a SET OF);
+ * if reordering is necessary it will be done in place (in attrs).
+ */
+extern SECStatus sec_PKCS7ReorderAttributes(SEC_PKCS7Attribute **attrs);
+
+/*
+ * Create a context for decrypting, based on the given key and algorithm.
+ */
+extern sec_PKCS7CipherObject *
+sec_PKCS7CreateDecryptObject(PK11SymKey *key, SECAlgorithmID *algid);
+
+/*
+ * Create a context for encrypting, based on the given key and algorithm,
+ * and fill in the algorithm id.
+ */
+extern sec_PKCS7CipherObject *
+sec_PKCS7CreateEncryptObject(PLArenaPool *poolp, PK11SymKey *key,
+                             SECOidTag algtag, SECAlgorithmID *algid);
+
+/*
+ * Destroy the given decryption or encryption object.
+ */
+extern void sec_PKCS7DestroyDecryptObject(sec_PKCS7CipherObject *obj);
+extern void sec_PKCS7DestroyEncryptObject(sec_PKCS7CipherObject *obj);
+
+/*
+ * What will be the output length of the next call to encrypt/decrypt?
+ * Result can be used to perform memory allocations.  Note that the amount
+ * is exactly accurate only when not doing a block cipher or when final
+ * is false, otherwise it is an upper bound on the amount because until
+ * we see the data we do not know how many padding bytes there are
+ * (always between 1 and the cipher block size).
+ *
+ * Note that this can return zero, which does not mean that the cipher
+ * operation can be skipped!  (It simply means that there are not enough
+ * bytes to make up an entire block; the bytes will be reserved until
+ * there are enough to encrypt/decrypt at least one block.)  However,
+ * if zero is returned it *does* mean that no output buffer need be
+ * passed in to the subsequent cipher operation, as no output bytes
+ * will be stored.
+ */
+extern unsigned int sec_PKCS7DecryptLength(sec_PKCS7CipherObject *obj,
+                                           unsigned int input_len,
+                                           PRBool final);
+extern unsigned int sec_PKCS7EncryptLength(sec_PKCS7CipherObject *obj,
+                                           unsigned int input_len,
+                                           PRBool final);
+
+/*
+ * Decrypt a given length of input buffer (starting at "input" and
+ * containing "input_len" bytes), placing the decrypted bytes in
+ * "output" and storing the output length in "*output_len_p".
+ * "obj" is the return value from sec_PKCS7CreateDecryptObject.
+ * When "final" is true, this is the last of the data to be decrypted.
+ */
+extern SECStatus sec_PKCS7Decrypt(sec_PKCS7CipherObject *obj,
+                                  unsigned char *output,
+                                  unsigned int *output_len_p,
+                                  unsigned int max_output_len,
+                                  const unsigned char *input,
+                                  unsigned int input_len,
+                                  PRBool final);
+
+/*
+ * Encrypt a given length of input buffer (starting at "input" and
+ * containing "input_len" bytes), placing the encrypted bytes in
+ * "output" and storing the output length in "*output_len_p".
+ * "obj" is the return value from sec_PKCS7CreateEncryptObject.
+ * When "final" is true, this is the last of the data to be encrypted.
+ */
+extern SECStatus sec_PKCS7Encrypt(sec_PKCS7CipherObject *obj,
+                                  unsigned char *output,
+                                  unsigned int *output_len_p,
+                                  unsigned int max_output_len,
+                                  const unsigned char *input,
+                                  unsigned int input_len,
+                                  PRBool final);
+
+/************************************************************************/
+SEC_END_PROTOS
+
+#endif /* _P7LOCAL_H_ */
diff --git a/security/nss/lib/pkcs7/pkcs7.gyp b/security/nss/lib/pkcs7/pkcs7.gyp
new file mode 100644
index 0000000000..8a73a2934d
--- /dev/null
+++ b/security/nss/lib/pkcs7/pkcs7.gyp
@@ -0,0 +1,29 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+{
+  'includes': [
+    '../../coreconf/config.gypi'
+  ],
+  'targets': [
+    {
+      'target_name': 'pkcs7',
+      'type': 'static_library',
+      'sources': [
+        'certread.c',
+        'p7common.c',
+        'p7create.c',
+        'p7decode.c',
+        'p7encode.c',
+        'p7local.c',
+        'secmime.c'
+      ],
+      'dependencies': [
+        '<(DEPTH)/exports.gyp:nss_exports'
+      ]
+    }
+  ],
+  'variables': {
+    'module': 'nss'
+  }
+}
\ No newline at end of file
diff --git a/security/nss/lib/pkcs7/pkcs7t.h b/security/nss/lib/pkcs7/pkcs7t.h
new file mode 100644
index 0000000000..4ef89027be
--- /dev/null
+++ b/security/nss/lib/pkcs7/pkcs7t.h
@@ -0,0 +1,233 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * Header for pkcs7 types.
+ */
+
+#ifndef _PKCS7T_H_
+#define _PKCS7T_H_
+
+#include "plarena.h"
+
+#include "seccomon.h"
+#include "secoidt.h"
+#include "certt.h"
+#include "secmodt.h"
+
+/* Opaque objects */
+typedef struct SEC_PKCS7DecoderContextStr SEC_PKCS7DecoderContext;
+typedef struct SEC_PKCS7EncoderContextStr SEC_PKCS7EncoderContext;
+
+/* legacy defines that haven't been active for years */
+typedef void *(*SECKEYGetPasswordKey)(void *arg, void *handle);
+
+/* Non-opaque objects.  NOTE, though: I want them to be treated as
+ * opaque as much as possible.  If I could hide them completely,
+ * I would.  (I tried, but ran into trouble that was taking me too
+ * much time to get out of.)  I still intend to try to do so.
+ * In fact, the only type that "outsiders" should even *name* is
+ * SEC_PKCS7ContentInfo, and they should not reference its fields.
+ */
+/* rjr: PKCS #11 cert handling (pk11cert.c) does use SEC_PKCS7RecipientInfo's.
+ * This is because when we search the recipient list for the cert and key we
+ * want, we need to invert the order of the loops we used to have. The old
+ * loops were:
+ *
+ *  For each recipient {
+ *       find_cert = PK11_Find_AllCert(recipient->issuerSN);
+ *       [which unrolls to... ]
+ *       For each slot {
+ *            Log into slot;
+ *            search slot for cert;
+ *      }
+ *  }
+ *
+ *  the new loop searchs all the recipients at once on a slot. this allows
+ *  PKCS #11 to order slots in such a way that logout slots don't get checked
+ *  if we can find the cert on a logged in slot. This eliminates lots of
+ *  spurious password prompts when smart cards are installed... so why this
+ *  comment? If you make SEC_PKCS7RecipientInfo completely opaque, you need
+ *  to provide a non-opaque list of issuerSN's (the only field PKCS#11 needs
+ *  and fix up pk11cert.c first. NOTE: Only S/MIME calls this special PKCS #11
+ *  function.
+ */
+typedef struct SEC_PKCS7ContentInfoStr SEC_PKCS7ContentInfo;
+typedef struct SEC_PKCS7SignedDataStr SEC_PKCS7SignedData;
+typedef struct SEC_PKCS7EncryptedContentInfoStr SEC_PKCS7EncryptedContentInfo;
+typedef struct SEC_PKCS7EnvelopedDataStr SEC_PKCS7EnvelopedData;
+typedef struct SEC_PKCS7SignedAndEnvelopedDataStr
+    SEC_PKCS7SignedAndEnvelopedData;
+typedef struct SEC_PKCS7SignerInfoStr SEC_PKCS7SignerInfo;
+typedef struct SEC_PKCS7RecipientInfoStr SEC_PKCS7RecipientInfo;
+typedef struct SEC_PKCS7DigestedDataStr SEC_PKCS7DigestedData;
+typedef struct SEC_PKCS7EncryptedDataStr SEC_PKCS7EncryptedData;
+/*
+ * The following is not actually a PKCS7 type, but for now it is only
+ * used by PKCS7, so we have adopted it.  If someone else *ever* needs
+ * it, its name should be changed and it should be moved out of here.
+ * Do not dare to use it without doing so!
+ */
+typedef struct SEC_PKCS7AttributeStr SEC_PKCS7Attribute;
+
+struct SEC_PKCS7ContentInfoStr {
+    PLArenaPool *poolp;         /* local; not part of encoding */
+    PRBool created;             /* local; not part of encoding */
+    int refCount;               /* local; not part of encoding */
+    SECOidData *contentTypeTag; /* local; not part of encoding */
+    SECKEYGetPasswordKey pwfn;  /* local; not part of encoding */
+    void *pwfn_arg;             /* local; not part of encoding */
+    SECItem contentType;
+    union {
+        SECItem *data;
+        SEC_PKCS7DigestedData *digestedData;
+        SEC_PKCS7EncryptedData *encryptedData;
+        SEC_PKCS7EnvelopedData *envelopedData;
+        SEC_PKCS7SignedData *signedData;
+        SEC_PKCS7SignedAndEnvelopedData *signedAndEnvelopedData;
+    } content;
+};
+
+struct SEC_PKCS7SignedDataStr {
+    SECItem version;
+    SECAlgorithmID **digestAlgorithms;
+    SEC_PKCS7ContentInfo contentInfo;
+    SECItem **rawCerts;
+    CERTSignedCrl **crls;
+    SEC_PKCS7SignerInfo **signerInfos;
+    SECItem **digests;               /* local; not part of encoding */
+    CERTCertificate **certs;         /* local; not part of encoding */
+    CERTCertificateList **certLists; /* local; not part of encoding */
+};
+#define SEC_PKCS7_SIGNED_DATA_VERSION 1 /* what we *create* */
+
+struct SEC_PKCS7EncryptedContentInfoStr {
+    SECOidData *contentTypeTag; /* local; not part of encoding */
+    SECItem contentType;
+    SECAlgorithmID contentEncAlg;
+    SECItem encContent;
+    SECItem plainContent; /* local; not part of encoding */
+                          /* bytes not encrypted, but encoded */
+    int keysize;          /* local; not part of encoding */
+                          /* size of bulk encryption key
+                           * (only used by creation code) */
+    SECOidTag encalg;     /* local; not part of encoding */
+                          /* oid tag of encryption algorithm
+                           * (only used by creation code) */
+};
+
+struct SEC_PKCS7EnvelopedDataStr {
+    SECItem version;
+    SEC_PKCS7RecipientInfo **recipientInfos;
+    SEC_PKCS7EncryptedContentInfo encContentInfo;
+};
+#define SEC_PKCS7_ENVELOPED_DATA_VERSION 0 /* what we *create* */
+
+struct SEC_PKCS7SignedAndEnvelopedDataStr {
+    SECItem version;
+    SEC_PKCS7RecipientInfo **recipientInfos;
+    SECAlgorithmID **digestAlgorithms;
+    SEC_PKCS7EncryptedContentInfo encContentInfo;
+    SECItem **rawCerts;
+    CERTSignedCrl **crls;
+    SEC_PKCS7SignerInfo **signerInfos;
+    SECItem **digests;               /* local; not part of encoding */
+    CERTCertificate **certs;         /* local; not part of encoding */
+    CERTCertificateList **certLists; /* local; not part of encoding */
+    PK11SymKey *sigKey;              /* local; not part of encoding */
+};
+#define SEC_PKCS7_SIGNED_AND_ENVELOPED_DATA_VERSION 1 /* what we *create* */
+
+struct SEC_PKCS7SignerInfoStr {
+    SECItem version;
+    CERTIssuerAndSN *issuerAndSN;
+    SECAlgorithmID digestAlg;
+    SEC_PKCS7Attribute **authAttr;
+    SECAlgorithmID digestEncAlg;
+    SECItem encDigest;
+    SEC_PKCS7Attribute **unAuthAttr;
+    CERTCertificate *cert;         /* local; not part of encoding */
+    CERTCertificateList *certList; /* local; not part of encoding */
+};
+#define SEC_PKCS7_SIGNER_INFO_VERSION 1 /* what we *create* */
+
+struct SEC_PKCS7RecipientInfoStr {
+    SECItem version;
+    CERTIssuerAndSN *issuerAndSN;
+    SECAlgorithmID keyEncAlg;
+    SECItem encKey;
+    CERTCertificate *cert; /* local; not part of encoding */
+};
+#define SEC_PKCS7_RECIPIENT_INFO_VERSION 0 /* what we *create* */
+
+struct SEC_PKCS7DigestedDataStr {
+    SECItem version;
+    SECAlgorithmID digestAlg;
+    SEC_PKCS7ContentInfo contentInfo;
+    SECItem digest;
+};
+#define SEC_PKCS7_DIGESTED_DATA_VERSION 0 /* what we *create* */
+
+struct SEC_PKCS7EncryptedDataStr {
+    SECItem version;
+    SEC_PKCS7EncryptedContentInfo encContentInfo;
+};
+#define SEC_PKCS7_ENCRYPTED_DATA_VERSION 0 /* what we *create* */
+
+/*
+ * See comment above about this type not really belonging to PKCS7.
+ */
+struct SEC_PKCS7AttributeStr {
+    /* The following fields make up an encoded Attribute: */
+    SECItem type;
+    SECItem **values; /* data may or may not be encoded */
+    /* The following fields are not part of an encoded Attribute: */
+    SECOidData *typeTag;
+    PRBool encoded; /* when true, values are encoded */
+};
+
+/*
+ * Type of function passed to SEC_PKCS7Decode or SEC_PKCS7DecoderStart.
+ * If specified, this is where the content bytes (only) will be "sent"
+ * as they are recovered during the decoding.
+ *
+ * XXX Should just combine this with SEC_PKCS7EncoderContentCallback type
+ * and use a simpler, common name.
+ */
+typedef void (*SEC_PKCS7DecoderContentCallback)(void *arg,
+                                                const char *buf,
+                                                unsigned long len);
+
+/*
+ * Type of function passed to SEC_PKCS7Encode or SEC_PKCS7EncoderStart.
+ * This is where the encoded bytes will be "sent".
+ *
+ * XXX Should just combine this with SEC_PKCS7DecoderContentCallback type
+ * and use a simpler, common name.
+ */
+typedef void (*SEC_PKCS7EncoderOutputCallback)(void *arg,
+                                               const char *buf,
+                                               unsigned long len);
+
+/*
+ * Type of function passed to SEC_PKCS7Decode or SEC_PKCS7DecoderStart
+ * to retrieve the decryption key.  This function is inteded to be
+ * used for EncryptedData content info's which do not have a key available
+ * in a certificate, etc.
+ */
+typedef PK11SymKey *(*SEC_PKCS7GetDecryptKeyCallback)(void *arg,
+                                                      SECAlgorithmID *algid);
+
+/*
+ * Type of function passed to SEC_PKCS7Decode or SEC_PKCS7DecoderStart.
+ * This function in intended to be used to verify that decrypting a
+ * particular crypto algorithm is allowed.  Content types which do not
+ * require decryption will not need the callback.  If the callback
+ * is not specified for content types which require decryption, the
+ * decryption will be disallowed.
+ */
+typedef PRBool (*SEC_PKCS7DecryptionAllowedCallback)(SECAlgorithmID *algid,
+                                                     PK11SymKey *bulkkey);
+
+#endif /* _PKCS7T_H_ */
diff --git a/security/nss/lib/pkcs7/secmime.c b/security/nss/lib/pkcs7/secmime.c
new file mode 100644
index 0000000000..8a4afe45b7
--- /dev/null
+++ b/security/nss/lib/pkcs7/secmime.c
@@ -0,0 +1,800 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * Stuff specific to S/MIME policy and interoperability.
+ * Depends on PKCS7, but there should be no dependency the other way around.
+ */
+
+#include "secmime.h"
+#include "secoid.h"
+#include "pk11func.h"
+#include "ciferfam.h" /* for CIPHER_FAMILY symbols */
+#include "secasn1.h"
+#include "secitem.h"
+#include "cert.h"
+#include "keyhi.h"
+#include "secerr.h"
+
+typedef struct smime_cipher_map_struct {
+    unsigned long cipher;
+    SECOidTag algtag;
+    SECItem *parms;
+} smime_cipher_map;
+
+/*
+ * These are macros because I think some subsequent parameters,
+ * like those for RC5, will want to use them, too, separately.
+ */
+#define SMIME_DER_INTVAL_16 SEC_ASN1_INTEGER, 0x01, 0x10
+#define SMIME_DER_INTVAL_40 SEC_ASN1_INTEGER, 0x01, 0x28
+#define SMIME_DER_INTVAL_64 SEC_ASN1_INTEGER, 0x01, 0x40
+#define SMIME_DER_INTVAL_128 SEC_ASN1_INTEGER, 0x02, 0x00, 0x80
+
+#ifdef SMIME_DOES_RC5 /* will be needed; quiet unused warning for now */
+static unsigned char smime_int16[] = { SMIME_DER_INTVAL_16 };
+#endif
+static unsigned char smime_int40[] = { SMIME_DER_INTVAL_40 };
+static unsigned char smime_int64[] = { SMIME_DER_INTVAL_64 };
+static unsigned char smime_int128[] = { SMIME_DER_INTVAL_128 };
+
+static SECItem smime_rc2p40 = { siBuffer, smime_int40, sizeof(smime_int40) };
+static SECItem smime_rc2p64 = { siBuffer, smime_int64, sizeof(smime_int64) };
+static SECItem smime_rc2p128 = { siBuffer, smime_int128, sizeof(smime_int128) };
+
+static smime_cipher_map smime_cipher_maps[] = {
+    { SMIME_RC2_CBC_40, SEC_OID_RC2_CBC, &smime_rc2p40 },
+    { SMIME_RC2_CBC_64, SEC_OID_RC2_CBC, &smime_rc2p64 },
+    { SMIME_RC2_CBC_128, SEC_OID_RC2_CBC, &smime_rc2p128 },
+#ifdef SMIME_DOES_RC5
+    { SMIME_RC5PAD_64_16_40, SEC_OID_RC5_CBC_PAD, &smime_rc5p40 },
+    { SMIME_RC5PAD_64_16_64, SEC_OID_RC5_CBC_PAD, &smime_rc5p64 },
+    { SMIME_RC5PAD_64_16_128, SEC_OID_RC5_CBC_PAD, &smime_rc5p128 },
+#endif
+    { SMIME_DES_CBC_56, SEC_OID_DES_CBC, NULL },
+    { SMIME_DES_EDE3_168, SEC_OID_DES_EDE3_CBC, NULL }
+};
+
+/*
+ * Note, the following value really just needs to be an upper bound
+ * on the ciphers.
+ */
+static const int smime_symmetric_count = sizeof(smime_cipher_maps) / sizeof(smime_cipher_map);
+
+static unsigned long *smime_prefs, *smime_newprefs;
+static int smime_current_pref_index = 0;
+static PRBool smime_prefs_complete = PR_FALSE;
+static PRBool smime_prefs_changed = PR_TRUE;
+
+static unsigned long smime_policy_bits = 0;
+
+static int
+smime_mapi_by_cipher(unsigned long cipher)
+{
+    int i;
+
+    for (i = 0; i < smime_symmetric_count; i++) {
+        if (smime_cipher_maps[i].cipher == cipher)
+            break;
+    }
+
+    if (i == smime_symmetric_count)
+        return -1;
+
+    return i;
+}
+
+/*
+ * this function locally records the user's preference
+ */
+SECStatus
+SECMIME_EnableCipher(long which, int on)
+{
+    unsigned long mask;
+
+    if (smime_newprefs == NULL || smime_prefs_complete) {
+        /*
+         * This is either the very first time, or we are starting over.
+         */
+        smime_newprefs = (unsigned long *)PORT_ZAlloc(smime_symmetric_count * sizeof(*smime_newprefs));
+        if (smime_newprefs == NULL)
+            return SECFailure;
+        smime_current_pref_index = 0;
+        smime_prefs_complete = PR_FALSE;
+    }
+
+    mask = which & CIPHER_FAMILYID_MASK;
+    if (mask == CIPHER_FAMILYID_MASK) {
+        /*
+         * This call signifies that all preferences have been set.
+         * Move "newprefs" over, after checking first whether or
+         * not the new ones are different from the old ones.
+         */
+        if (smime_prefs != NULL) {
+            if (PORT_Memcmp(smime_prefs, smime_newprefs,
+                            smime_symmetric_count * sizeof(*smime_prefs)) == 0)
+                smime_prefs_changed = PR_FALSE;
+            else
+                smime_prefs_changed = PR_TRUE;
+            PORT_Free(smime_prefs);
+        }
+
+        smime_prefs = smime_newprefs;
+        smime_prefs_complete = PR_TRUE;
+        return SECSuccess;
+    }
+
+    PORT_Assert(mask == CIPHER_FAMILYID_SMIME);
+    if (mask != CIPHER_FAMILYID_SMIME) {
+        /* XXX set an error! */
+        return SECFailure;
+    }
+
+    if (on) {
+        PORT_Assert(smime_current_pref_index < smime_symmetric_count);
+        if (smime_current_pref_index >= smime_symmetric_count) {
+            /* XXX set an error! */
+            return SECFailure;
+        }
+
+        smime_newprefs[smime_current_pref_index++] = which;
+    }
+
+    return SECSuccess;
+}
+
+/*
+ * this function locally records the export policy
+ */
+SECStatus
+SECMIME_SetPolicy(long which, int on)
+{
+    unsigned long mask;
+
+    PORT_Assert((which & CIPHER_FAMILYID_MASK) == CIPHER_FAMILYID_SMIME);
+    if ((which & CIPHER_FAMILYID_MASK) != CIPHER_FAMILYID_SMIME) {
+        /* XXX set an error! */
+        return SECFailure;
+    }
+
+    which &= ~CIPHER_FAMILYID_MASK;
+
+    PORT_Assert(which < 32); /* bits in the long */
+    if (which >= 32) {
+        /* XXX set an error! */
+        return SECFailure;
+    }
+
+    mask = 1UL << which;
+
+    if (on) {
+        smime_policy_bits |= mask;
+    } else {
+        smime_policy_bits &= ~mask;
+    }
+
+    return SECSuccess;
+}
+
+/*
+ * Based on the given algorithm (including its parameters, in some cases!)
+ * and the given key (may or may not be inspected, depending on the
+ * algorithm), find the appropriate policy algorithm specification
+ * and return it.  If no match can be made, -1 is returned.
+ */
+static long
+smime_policy_algorithm(SECAlgorithmID *algid, PK11SymKey *key)
+{
+    SECOidTag algtag;
+
+    algtag = SECOID_GetAlgorithmTag(algid);
+    switch (algtag) {
+        case SEC_OID_RC2_CBC: {
+            unsigned int keylen_bits;
+
+            keylen_bits = PK11_GetKeyStrength(key, algid);
+            switch (keylen_bits) {
+                case 40:
+                    return SMIME_RC2_CBC_40;
+                case 64:
+                    return SMIME_RC2_CBC_64;
+                case 128:
+                    return SMIME_RC2_CBC_128;
+                default:
+                    break;
+            }
+        } break;
+        case SEC_OID_DES_CBC:
+            return SMIME_DES_CBC_56;
+        case SEC_OID_DES_EDE3_CBC:
+            return SMIME_DES_EDE3_168;
+#ifdef SMIME_DOES_RC5
+        case SEC_OID_RC5_CBC_PAD:
+            PORT_Assert(0); /* XXX need to pull out parameters and match */
+            break;
+#endif
+        default:
+            break;
+    }
+
+    return -1;
+}
+
+static PRBool
+smime_cipher_allowed(unsigned long which)
+{
+    unsigned long mask;
+
+    which &= ~CIPHER_FAMILYID_MASK;
+    PORT_Assert(which < 32); /* bits per long (min) */
+    if (which >= 32)
+        return PR_FALSE;
+
+    mask = 1UL << which;
+    if ((mask & smime_policy_bits) == 0)
+        return PR_FALSE;
+
+    return PR_TRUE;
+}
+
+PRBool
+SECMIME_DecryptionAllowed(SECAlgorithmID *algid, PK11SymKey *key)
+{
+    long which;
+
+    which = smime_policy_algorithm(algid, key);
+    if (which < 0)
+        return PR_FALSE;
+
+    return smime_cipher_allowed((unsigned long)which);
+}
+
+/*
+ * Does the current policy allow *any* S/MIME encryption (or decryption)?
+ *
+ * This tells whether or not *any* S/MIME encryption can be done,
+ * according to policy.  Callers may use this to do nicer user interface
+ * (say, greying out a checkbox so a user does not even try to encrypt
+ * a message when they are not allowed to) or for any reason they want
+ * to check whether S/MIME encryption (or decryption, for that matter)
+ * may be done.
+ *
+ * It takes no arguments.  The return value is a simple boolean:
+ *   PR_TRUE means encryption (or decryption) is *possible*
+ *      (but may still fail due to other reasons, like because we cannot
+ *      find all the necessary certs, etc.; PR_TRUE is *not* a guarantee)
+ *   PR_FALSE means encryption (or decryption) is not permitted
+ *
+ * There are no errors from this routine.
+ */
+PRBool
+SECMIME_EncryptionPossible(void)
+{
+    if (smime_policy_bits != 0)
+        return PR_TRUE;
+
+    return PR_FALSE;
+}
+
+/*
+ * XXX Would like the "parameters" field to be a SECItem *, but the
+ * encoder is having trouble with optional pointers to an ANY.  Maybe
+ * once that is fixed, can change this back...
+ */
+typedef struct smime_capability_struct {
+    unsigned long cipher; /* local; not part of encoding */
+    SECOidTag capIDTag;   /* local; not part of encoding */
+    SECItem capabilityID;
+    SECItem parameters;
+} smime_capability;
+
+static const SEC_ASN1Template smime_capability_template[] = {
+    { SEC_ASN1_SEQUENCE,
+      0, NULL, sizeof(smime_capability) },
+    { SEC_ASN1_OBJECT_ID,
+      offsetof(smime_capability, capabilityID) },
+    { SEC_ASN1_OPTIONAL | SEC_ASN1_ANY,
+      offsetof(smime_capability, parameters) },
+    { 0 }
+};
+
+static const SEC_ASN1Template smime_capabilities_template[] = {
+    { SEC_ASN1_SEQUENCE_OF, 0, smime_capability_template }
+};
+
+static void
+smime_fill_capability(smime_capability *cap)
+{
+    unsigned long cipher;
+    SECOidTag algtag;
+    int i;
+
+    algtag = SECOID_FindOIDTag(&(cap->capabilityID));
+
+    for (i = 0; i < smime_symmetric_count; i++) {
+        if (smime_cipher_maps[i].algtag != algtag)
+            continue;
+        /*
+         * XXX If SECITEM_CompareItem allowed NULLs as arguments (comparing
+         * 2 NULLs as equal and NULL and non-NULL as not equal), we could
+         * use that here instead of all of the following comparison code.
+         */
+        if (cap->parameters.data != NULL) {
+            if (smime_cipher_maps[i].parms == NULL)
+                continue;
+            if (cap->parameters.len != smime_cipher_maps[i].parms->len)
+                continue;
+            if (PORT_Memcmp(cap->parameters.data,
+                            smime_cipher_maps[i].parms->data,
+                            cap->parameters.len) == 0)
+                break;
+        } else if (smime_cipher_maps[i].parms == NULL) {
+            break;
+        }
+    }
+
+    if (i == smime_symmetric_count)
+        cipher = 0;
+    else
+        cipher = smime_cipher_maps[i].cipher;
+
+    cap->cipher = cipher;
+    cap->capIDTag = algtag;
+}
+
+static long
+smime_choose_cipher(CERTCertificate *scert, CERTCertificate **rcerts)
+{
+    PLArenaPool *poolp;
+    long chosen_cipher;
+    int *cipher_abilities;
+    int *cipher_votes;
+    int strong_mapi;
+    int rcount, mapi, max;
+
+    if (smime_policy_bits == 0) {
+        PORT_SetError(SEC_ERROR_BAD_EXPORT_ALGORITHM);
+        return -1;
+    }
+
+    chosen_cipher = SMIME_RC2_CBC_40; /* the default, LCD */
+
+    poolp = PORT_NewArena(1024); /* XXX what is right value? */
+    if (poolp == NULL)
+        goto done;
+
+    cipher_abilities = (int *)PORT_ArenaZAlloc(poolp,
+                                               smime_symmetric_count * sizeof(int));
+    if (cipher_abilities == NULL)
+        goto done;
+
+    cipher_votes = (int *)PORT_ArenaZAlloc(poolp,
+                                           smime_symmetric_count * sizeof(int));
+    if (cipher_votes == NULL)
+        goto done;
+
+    /*
+     * XXX Should have a #define somewhere which specifies default
+     * strong cipher.  (Or better, a way to configure.)
+     */
+
+    /* Make triple-DES the strong cipher. */
+    strong_mapi = smime_mapi_by_cipher(SMIME_DES_EDE3_168);
+
+    PORT_Assert(strong_mapi >= 0);
+
+    for (rcount = 0; rcerts[rcount] != NULL; rcount++) {
+        SECItem *profile;
+        smime_capability **caps;
+        int capi, pref;
+        SECStatus dstat;
+
+        pref = smime_symmetric_count;
+        profile = CERT_FindSMimeProfile(rcerts[rcount]);
+        if (profile != NULL && profile->data != NULL && profile->len > 0) {
+            caps = NULL;
+            dstat = SEC_QuickDERDecodeItem(poolp, &caps,
+                                           smime_capabilities_template,
+                                           profile);
+            if (dstat == SECSuccess && caps != NULL) {
+                for (capi = 0; caps[capi] != NULL; capi++) {
+                    smime_fill_capability(caps[capi]);
+                    mapi = smime_mapi_by_cipher(caps[capi]->cipher);
+                    if (mapi >= 0) {
+                        cipher_abilities[mapi]++;
+                        cipher_votes[mapi] += pref;
+                        --pref;
+                    }
+                }
+            }
+        } else {
+            SECKEYPublicKey *key;
+            unsigned int pklen_bits;
+
+            /*
+             * XXX This is probably only good for RSA keys.  What I would
+             * really like is a function to just say;  Is the public key in
+             * this cert an export-length key?  Then I would not have to
+             * know things like the value 512, or the kind of key, or what
+             * a subjectPublicKeyInfo is, etc.
+             */
+            key = CERT_ExtractPublicKey(rcerts[rcount]);
+            if (key != NULL) {
+                pklen_bits = SECKEY_PublicKeyStrength(key) * 8;
+                SECKEY_DestroyPublicKey(key);
+
+                if (pklen_bits > 512) {
+                    cipher_abilities[strong_mapi]++;
+                    cipher_votes[strong_mapi] += pref;
+                }
+            }
+        }
+        if (profile != NULL)
+            SECITEM_FreeItem(profile, PR_TRUE);
+    }
+
+    max = 0;
+    for (mapi = 0; mapi < smime_symmetric_count; mapi++) {
+        if (cipher_abilities[mapi] != rcount)
+            continue;
+        if (!smime_cipher_allowed(smime_cipher_maps[mapi].cipher))
+            continue;
+        if (cipher_votes[mapi] > max) {
+            chosen_cipher = smime_cipher_maps[mapi].cipher;
+            max = cipher_votes[mapi];
+        } /* XXX else if a tie, let scert break it? */
+    }
+
+done:
+    if (poolp != NULL)
+        PORT_FreeArena(poolp, PR_FALSE);
+
+    return chosen_cipher;
+}
+
+/*
+ * XXX This is a hack for now to satisfy our current interface.
+ * Eventually, with more parameters needing to be specified, just
+ * looking up the keysize is not going to be sufficient.
+ */
+static int
+smime_keysize_by_cipher(unsigned long which)
+{
+    int keysize;
+
+    switch (which) {
+        case SMIME_RC2_CBC_40:
+            keysize = 40;
+            break;
+        case SMIME_RC2_CBC_64:
+            keysize = 64;
+            break;
+        case SMIME_RC2_CBC_128:
+            keysize = 128;
+            break;
+#ifdef SMIME_DOES_RC5
+        case SMIME_RC5PAD_64_16_40:
+        case SMIME_RC5PAD_64_16_64:
+        case SMIME_RC5PAD_64_16_128:
+            /* XXX See comment above; keysize is not enough... */
+            PORT_Assert(0);
+            PORT_SetError(SEC_ERROR_INVALID_ALGORITHM);
+            keysize = -1;
+            break;
+#endif
+        case SMIME_DES_CBC_56:
+        case SMIME_DES_EDE3_168:
+            /*
+             * These are special; since the key size is fixed, we actually
+             * want to *avoid* specifying a key size.
+             */
+            keysize = 0;
+            break;
+        default:
+            keysize = -1;
+            break;
+    }
+
+    return keysize;
+}
+
+/*
+ * Start an S/MIME encrypting context.
+ *
+ * "scert" is the cert for the sender.  It will be checked for validity.
+ * "rcerts" are the certs for the recipients.  They will also be checked.
+ *
+ * "certdb" is the cert database to use for verifying the certs.
+ * It can be NULL if a default database is available (like in the client).
+ *
+ * This function already does all of the stuff specific to S/MIME protocol
+ * and local policy; the return value just needs to be passed to
+ * SEC_PKCS7Encode() or to SEC_PKCS7EncoderStart() to create the encoded data,
+ * and finally to SEC_PKCS7DestroyContentInfo().
+ *
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+SEC_PKCS7ContentInfo *
+SECMIME_CreateEncrypted(CERTCertificate *scert,
+                        CERTCertificate **rcerts,
+                        CERTCertDBHandle *certdb,
+                        SECKEYGetPasswordKey pwfn,
+                        void *pwfn_arg)
+{
+    SEC_PKCS7ContentInfo *cinfo;
+    long cipher;
+    SECOidTag encalg;
+    int keysize;
+    int mapi, rci;
+
+    cipher = smime_choose_cipher(scert, rcerts);
+    if (cipher < 0)
+        return NULL;
+
+    mapi = smime_mapi_by_cipher(cipher);
+    if (mapi < 0)
+        return NULL;
+
+    /*
+     * XXX This is stretching it -- CreateEnvelopedData should probably
+     * take a cipher itself of some sort, because we cannot know what the
+     * future will bring in terms of parameters for each type of algorithm.
+     * For example, just an algorithm and keysize is *not* sufficient to
+     * fully specify the usage of RC5 (which also needs to know rounds and
+     * block size).  Work this out into a better API!
+     */
+    encalg = smime_cipher_maps[mapi].algtag;
+    keysize = smime_keysize_by_cipher(cipher);
+    if (keysize < 0)
+        return NULL;
+
+    cinfo = SEC_PKCS7CreateEnvelopedData(scert, certUsageEmailRecipient,
+                                         certdb, encalg, keysize,
+                                         pwfn, pwfn_arg);
+    if (cinfo == NULL)
+        return NULL;
+
+    for (rci = 0; rcerts[rci] != NULL; rci++) {
+        if (rcerts[rci] == scert)
+            continue;
+        if (SEC_PKCS7AddRecipient(cinfo, rcerts[rci], certUsageEmailRecipient,
+                                  NULL) != SECSuccess) {
+            SEC_PKCS7DestroyContentInfo(cinfo);
+            return NULL;
+        }
+    }
+
+    return cinfo;
+}
+
+static smime_capability **smime_capabilities;
+static SECItem *smime_encoded_caps;
+
+static SECStatus
+smime_init_caps(void)
+{
+    smime_capability *cap;
+    smime_cipher_map *map;
+    SECOidData *oiddata;
+    SECStatus rv;
+    int i;
+
+    if (smime_encoded_caps != NULL && (!smime_prefs_changed))
+        return SECSuccess;
+
+    if (smime_encoded_caps != NULL) {
+        SECITEM_FreeItem(smime_encoded_caps, PR_TRUE);
+        smime_encoded_caps = NULL;
+    }
+
+    if (smime_capabilities == NULL) {
+        smime_capabilities = (smime_capability **)PORT_ZAlloc(
+            (smime_symmetric_count + 1) * sizeof(smime_capability *));
+        if (smime_capabilities == NULL)
+            return SECFailure;
+    }
+
+    rv = SECFailure;
+
+    /*
+       The process of creating the encoded PKCS7 cipher capability list
+       involves two basic steps:
+
+       (a) Convert our internal representation of cipher preferences
+           (smime_prefs) into an array containing cipher OIDs and
+           parameter data (smime_capabilities). This step is
+           performed here.
+
+       (b) Encode, using ASN.1, the cipher information in
+           smime_capabilities, leaving the encoded result in
+           smime_encoded_caps.
+
+       (In the process of performing (a), Lisa put in some optimizations
+       which allow us to avoid needlessly re-populating elements in
+       smime_capabilities as we walk through smime_prefs.)
+    */
+    for (i = 0; i < smime_current_pref_index; i++) {
+        int mapi;
+
+        /* Get the next cipher preference in smime_prefs. */
+        mapi = smime_mapi_by_cipher(smime_prefs[i]);
+        if (mapi < 0)
+            break;
+
+        /* Find the corresponding entry in the cipher map. */
+        PORT_Assert(mapi < smime_symmetric_count);
+        map = &(smime_cipher_maps[mapi]);
+
+        /*
+         * Convert the next preference found in smime_prefs into an
+         * smime_capability.
+         */
+
+        cap = smime_capabilities[i];
+        if (cap == NULL) {
+            cap = (smime_capability *)PORT_ZAlloc(sizeof(smime_capability));
+            if (cap == NULL)
+                break;
+            smime_capabilities[i] = cap;
+        } else if (cap->cipher == smime_prefs[i]) {
+            continue; /* no change to this one */
+        }
+
+        cap->capIDTag = map->algtag;
+        oiddata = SECOID_FindOIDByTag(map->algtag);
+        if (oiddata == NULL)
+            break;
+
+        if (cap->capabilityID.data != NULL) {
+            SECITEM_FreeItem(&(cap->capabilityID), PR_FALSE);
+            cap->capabilityID.data = NULL;
+            cap->capabilityID.len = 0;
+        }
+
+        rv = SECITEM_CopyItem(NULL, &(cap->capabilityID), &(oiddata->oid));
+        if (rv != SECSuccess)
+            break;
+
+        if (map->parms == NULL) {
+            cap->parameters.data = NULL;
+            cap->parameters.len = 0;
+        } else {
+            cap->parameters.data = map->parms->data;
+            cap->parameters.len = map->parms->len;
+        }
+
+        cap->cipher = smime_prefs[i];
+    }
+
+    if (i != smime_current_pref_index)
+        return rv;
+
+    while (i < smime_symmetric_count) {
+        cap = smime_capabilities[i];
+        if (cap != NULL) {
+            SECITEM_FreeItem(&(cap->capabilityID), PR_FALSE);
+            PORT_Free(cap);
+        }
+        smime_capabilities[i] = NULL;
+        i++;
+    }
+    smime_capabilities[i] = NULL;
+
+    smime_encoded_caps = SEC_ASN1EncodeItem(NULL, NULL, &smime_capabilities,
+                                            smime_capabilities_template);
+    if (smime_encoded_caps == NULL)
+        return SECFailure;
+
+    return SECSuccess;
+}
+
+static SECStatus
+smime_add_profile(CERTCertificate *cert, SEC_PKCS7ContentInfo *cinfo)
+{
+    PORT_Assert(smime_prefs_complete);
+    if (!smime_prefs_complete)
+        return SECFailure;
+
+    /* For that matter, if capabilities haven't been initialized yet,
+       do so now. */
+    if (smime_encoded_caps == NULL || smime_prefs_changed) {
+        SECStatus rv;
+
+        rv = smime_init_caps();
+        if (rv != SECSuccess)
+            return rv;
+
+        PORT_Assert(smime_encoded_caps != NULL);
+    }
+
+    return SEC_PKCS7AddSignedAttribute(cinfo, SEC_OID_PKCS9_SMIME_CAPABILITIES,
+                                       smime_encoded_caps);
+}
+
+/*
+ * Start an S/MIME signing context.
+ *
+ * "scert" is the cert that will be used to sign the data.  It will be
+ * checked for validity.
+ *
+ * "ecert" is the signer's encryption cert.  If it is different from
+ * scert, then it will be included in the signed message so that the
+ * recipient can save it for future encryptions.
+ *
+ * "certdb" is the cert database to use for verifying the cert.
+ * It can be NULL if a default database is available (like in the client).
+ *
+ * "digestalg" names the digest algorithm (e.g. SEC_OID_SHA1).
+ * XXX There should be SECMIME functions for hashing, or the hashing should
+ * be built into this interface, which we would like because we would
+ * support more smartcards that way, and then this argument should go away.)
+ *
+ * "digest" is the actual digest of the data.  It must be provided in
+ * the case of detached data or NULL if the content will be included.
+ *
+ * This function already does all of the stuff specific to S/MIME protocol
+ * and local policy; the return value just needs to be passed to
+ * SEC_PKCS7Encode() or to SEC_PKCS7EncoderStart() to create the encoded data,
+ * and finally to SEC_PKCS7DestroyContentInfo().
+ *
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+
+SEC_PKCS7ContentInfo *
+SECMIME_CreateSigned(CERTCertificate *scert,
+                     CERTCertificate *ecert,
+                     CERTCertDBHandle *certdb,
+                     SECOidTag digestalg,
+                     SECItem *digest,
+                     SECKEYGetPasswordKey pwfn,
+                     void *pwfn_arg)
+{
+    SEC_PKCS7ContentInfo *cinfo;
+    SECStatus rv;
+
+    /* See note in header comment above about digestalg. */
+    /* Doesn't explain this. PORT_Assert (digestalg == SEC_OID_SHA1); */
+
+    cinfo = SEC_PKCS7CreateSignedData(scert, certUsageEmailSigner,
+                                      certdb, digestalg, digest,
+                                      pwfn, pwfn_arg);
+    if (cinfo == NULL)
+        return NULL;
+
+    if (SEC_PKCS7IncludeCertChain(cinfo, NULL) != SECSuccess) {
+        SEC_PKCS7DestroyContentInfo(cinfo);
+        return NULL;
+    }
+
+    /* if the encryption cert and the signing cert differ, then include
+     * the encryption cert too.
+     */
+    /* it is ok to compare the pointers since we ref count, and the same
+     * cert will always have the same pointer
+     */
+    if ((ecert != NULL) && (ecert != scert)) {
+        rv = SEC_PKCS7AddCertificate(cinfo, ecert);
+        if (rv != SECSuccess) {
+            SEC_PKCS7DestroyContentInfo(cinfo);
+            return NULL;
+        }
+    }
+    /*
+     * Add the signing time.  But if it fails for some reason,
+     * may as well not give up altogether -- just assert.
+     */
+    rv = SEC_PKCS7AddSigningTime(cinfo);
+    PORT_Assert(rv == SECSuccess);
+
+    /*
+     * Add the email profile.  Again, if it fails for some reason,
+     * may as well not give up altogether -- just assert.
+     */
+    rv = smime_add_profile(ecert, cinfo);
+    PORT_Assert(rv == SECSuccess);
+
+    return cinfo;
+}
diff --git a/security/nss/lib/pkcs7/secmime.h b/security/nss/lib/pkcs7/secmime.h
new file mode 100644
index 0000000000..683cd8db46
--- /dev/null
+++ b/security/nss/lib/pkcs7/secmime.h
@@ -0,0 +1,160 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * Header file for routines specific to S/MIME.  Keep things that are pure
+ * pkcs7 out of here; this is for S/MIME policy, S/MIME interoperability, etc.
+ */
+
+#ifndef _SECMIME_H_
+#define _SECMIME_H_ 1
+
+#include "secpkcs7.h"
+
+/************************************************************************/
+SEC_BEGIN_PROTOS
+
+/*
+ * Initialize the local recording of the user S/MIME cipher preferences.
+ * This function is called once for each cipher, the order being
+ * important (first call records greatest preference, and so on).
+ * When finished, it is called with a "which" of CIPHER_FAMILID_MASK.
+ * If the function is called again after that, it is assumed that
+ * the preferences are being reset, and the old preferences are
+ * discarded.
+ *
+ * XXX This is for a particular user, and right now the storage is
+ * XXX local, static.  The preference should be stored elsewhere to allow
+ * XXX for multiple uses of one library?  How does SSL handle this;
+ * XXX it has something similar?
+ *
+ *  - The "which" values are defined in ciferfam.h (the SMIME_* values,
+ *    for example SMIME_DES_CBC_56).
+ *  - If "on" is non-zero then the named cipher is enabled, otherwise
+ *    it is disabled.  (It is not necessary to call the function for
+ *    ciphers that are disabled, however, as that is the default.)
+ *
+ * If the cipher preference is successfully recorded, SECSuccess
+ * is returned.  Otherwise SECFailure is returned.  The only errors
+ * are due to failure allocating memory or bad parameters/calls:
+ *	SEC_ERROR_XXX ("which" is not in the S/MIME cipher family)
+ *	SEC_ERROR_XXX (function is being called more times than there
+ *		are known/expected ciphers)
+ */
+extern SECStatus SECMIME_EnableCipher(long which, int on);
+
+/*
+ * Initialize the local recording of the S/MIME policy.
+ * This function is called to enable/disable a particular cipher.
+ * (S/MIME encryption or decryption using a particular cipher is only
+ * allowed if that cipher is currently enabled.)  At startup, all S/MIME
+ * ciphers are disabled.  From that point, this function can be called
+ * to enable a cipher -- it is not necessary to call this to disable
+ * a cipher unless that cipher was previously, explicitly enabled via
+ * this function.
+ *
+ * XXX This is for a the current module, I think, so local, static storage
+ * XXX is okay.  Is that correct, or could multiple uses of the same
+ * XXX library expect to operate under different policies?
+ *
+ *  - The "which" values are defined in ciferfam.h (the SMIME_* values,
+ *    for example SMIME_DES_CBC_56).
+ *  - If "on" is non-zero then the named cipher is enabled, otherwise
+ *    it is disabled.
+ *
+ * If the cipher is successfully enabled/disabled, SECSuccess is
+ * returned.  Otherwise SECFailure is returned.  The only errors
+ * are due to bad parameters:
+ *	SEC_ERROR_XXX ("which" is not in the S/MIME cipher family)
+ *	SEC_ERROR_XXX ("which" exceeds expected maximum cipher; this is
+ *		really an internal error)
+ */
+extern SECStatus SECMIME_SetPolicy(long which, int on);
+
+/*
+ * Does the current policy allow S/MIME decryption of this particular
+ * algorithm and keysize?
+ */
+extern PRBool SECMIME_DecryptionAllowed(SECAlgorithmID *algid, PK11SymKey *key);
+
+/*
+ * Does the current policy allow *any* S/MIME encryption (or decryption)?
+ *
+ * This tells whether or not *any* S/MIME encryption can be done,
+ * according to policy.  Callers may use this to do nicer user interface
+ * (say, greying out a checkbox so a user does not even try to encrypt
+ * a message when they are not allowed to) or for any reason they want
+ * to check whether S/MIME encryption (or decryption, for that matter)
+ * may be done.
+ *
+ * It takes no arguments.  The return value is a simple boolean:
+ *   PR_TRUE means encryption (or decryption) is *possible*
+ *	(but may still fail due to other reasons, like because we cannot
+ *	find all the necessary certs, etc.; PR_TRUE is *not* a guarantee)
+ *   PR_FALSE means encryption (or decryption) is not permitted
+ *
+ * There are no errors from this routine.
+ */
+extern PRBool SECMIME_EncryptionPossible(void);
+
+/*
+ * Start an S/MIME encrypting context.
+ *
+ * "scert" is the cert for the sender.  It will be checked for validity.
+ * "rcerts" are the certs for the recipients.  They will also be checked.
+ *
+ * "certdb" is the cert database to use for verifying the certs.
+ * It can be NULL if a default database is available (like in the client).
+ *
+ * This function already does all of the stuff specific to S/MIME protocol
+ * and local policy; the return value just needs to be passed to
+ * SEC_PKCS7Encode() or to SEC_PKCS7EncoderStart() to create the encoded data,
+ * and finally to SEC_PKCS7DestroyContentInfo().
+ *
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+extern SEC_PKCS7ContentInfo *SECMIME_CreateEncrypted(CERTCertificate *scert,
+                                                     CERTCertificate **rcerts,
+                                                     CERTCertDBHandle *certdb,
+                                                     SECKEYGetPasswordKey pwfn,
+                                                     void *pwfn_arg);
+
+/*
+ * Start an S/MIME signing context.
+ *
+ * "scert" is the cert that will be used to sign the data.  It will be
+ * checked for validity.
+ *
+ * "certdb" is the cert database to use for verifying the cert.
+ * It can be NULL if a default database is available (like in the client).
+ *
+ * "digestalg" names the digest algorithm.  (It should be SEC_OID_SHA1;
+ * XXX There should be SECMIME functions for hashing, or the hashing should
+ * be built into this interface, which we would like because we would
+ * support more smartcards that way, and then this argument should go away.)
+ *
+ * "digest" is the actual digest of the data.  It must be provided in
+ * the case of detached data or NULL if the content will be included.
+ *
+ * This function already does all of the stuff specific to S/MIME protocol
+ * and local policy; the return value just needs to be passed to
+ * SEC_PKCS7Encode() or to SEC_PKCS7EncoderStart() to create the encoded data,
+ * and finally to SEC_PKCS7DestroyContentInfo().
+ *
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+extern SEC_PKCS7ContentInfo *SECMIME_CreateSigned(CERTCertificate *scert,
+                                                  CERTCertificate *ecert,
+                                                  CERTCertDBHandle *certdb,
+                                                  SECOidTag digestalg,
+                                                  SECItem *digest,
+                                                  SECKEYGetPasswordKey pwfn,
+                                                  void *pwfn_arg);
+
+/************************************************************************/
+SEC_END_PROTOS
+
+#endif /* _SECMIME_H_ */
diff --git a/security/nss/lib/pkcs7/secpkcs7.h b/security/nss/lib/pkcs7/secpkcs7.h
new file mode 100644
index 0000000000..4a88df1dfb
--- /dev/null
+++ b/security/nss/lib/pkcs7/secpkcs7.h
@@ -0,0 +1,626 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * Interface to the PKCS7 implementation.
+ */
+
+#ifndef _SECPKCS7_H_
+#define _SECPKCS7_H_
+
+#include "seccomon.h"
+
+#include "secoidt.h"
+#include "certt.h"
+#include "keythi.h"
+#include "hasht.h"
+#include "pkcs7t.h"
+
+extern const SEC_ASN1Template sec_PKCS7ContentInfoTemplate[];
+
+/************************************************************************/
+SEC_BEGIN_PROTOS
+
+/************************************************************************
+ *      Miscellaneous
+ ************************************************************************/
+
+/*
+ * Returns the content type of the given contentInfo.
+ */
+extern SECOidTag SEC_PKCS7ContentType(SEC_PKCS7ContentInfo *cinfo);
+
+/*
+ * Destroy a PKCS7 contentInfo and all of its sub-pieces.
+ */
+extern void SEC_PKCS7DestroyContentInfo(SEC_PKCS7ContentInfo *contentInfo);
+
+/*
+ * Copy a PKCS7 contentInfo.  A Destroy is needed on *each* copy.
+ */
+extern SEC_PKCS7ContentInfo *
+SEC_PKCS7CopyContentInfo(SEC_PKCS7ContentInfo *contentInfo);
+
+/*
+ * Return a pointer to the actual content.  In the case of those types
+ * which are encrypted, this returns the *plain* content.
+ */
+extern SECItem *SEC_PKCS7GetContent(SEC_PKCS7ContentInfo *cinfo);
+
+/************************************************************************
+ *      PKCS7 Decoding, Verification, etc..
+ ************************************************************************/
+
+extern SEC_PKCS7DecoderContext *
+SEC_PKCS7DecoderStart(SEC_PKCS7DecoderContentCallback callback,
+                      void *callback_arg,
+                      SECKEYGetPasswordKey pwfn, void *pwfn_arg,
+                      SEC_PKCS7GetDecryptKeyCallback decrypt_key_cb,
+                      void *decrypt_key_cb_arg,
+                      SEC_PKCS7DecryptionAllowedCallback decrypt_allowed_cb);
+
+extern SECStatus
+SEC_PKCS7DecoderUpdate(SEC_PKCS7DecoderContext *p7dcx,
+                       const char *buf, unsigned long len);
+
+extern SEC_PKCS7ContentInfo *
+SEC_PKCS7DecoderFinish(SEC_PKCS7DecoderContext *p7dcx);
+
+/*  Abort the underlying ASN.1 stream & set an error  */
+void SEC_PKCS7DecoderAbort(SEC_PKCS7DecoderContext *p7dcx, int error);
+
+extern SEC_PKCS7ContentInfo *
+SEC_PKCS7DecodeItem(SECItem *p7item,
+                    SEC_PKCS7DecoderContentCallback cb, void *cb_arg,
+                    SECKEYGetPasswordKey pwfn, void *pwfn_arg,
+                    SEC_PKCS7GetDecryptKeyCallback decrypt_key_cb,
+                    void *decrypt_key_cb_arg,
+                    SEC_PKCS7DecryptionAllowedCallback decrypt_allowed_cb);
+
+extern PRBool SEC_PKCS7ContainsCertsOrCrls(SEC_PKCS7ContentInfo *cinfo);
+
+/* checks to see if the contents of the content info is
+ * empty.  it so, PR_TRUE is returned.  PR_FALSE, otherwise.
+ *
+ * minLen is used to specify a minimum size.  if content size <= minLen,
+ * content is assumed empty.
+ */
+extern PRBool
+SEC_PKCS7IsContentEmpty(SEC_PKCS7ContentInfo *cinfo, unsigned int minLen);
+
+extern PRBool SEC_PKCS7ContentIsEncrypted(SEC_PKCS7ContentInfo *cinfo);
+
+/*
+ * If the PKCS7 content has a signature (not just *could* have a signature)
+ * return true; false otherwise.  This can/should be called before calling
+ * VerifySignature, which will always indicate failure if no signature is
+ * present, but that does not mean there even was a signature!
+ * Note that the content itself can be empty (detached content was sent
+ * another way); it is the presence of the signature that matters.
+ */
+extern PRBool SEC_PKCS7ContentIsSigned(SEC_PKCS7ContentInfo *cinfo);
+
+/*
+ * SEC_PKCS7VerifySignature
+ *      Look at a PKCS7 contentInfo and check if the signature is good.
+ *      The verification checks that the signing cert is valid and trusted
+ *      for the purpose specified by "certusage".
+ *
+ *      In addition, if "keepcerts" is true, add any new certificates found
+ *      into our local database.
+ */
+extern PRBool SEC_PKCS7VerifySignature(SEC_PKCS7ContentInfo *cinfo,
+                                       SECCertUsage certusage,
+                                       PRBool keepcerts);
+
+/*
+ * SEC_PKCS7VerifyDetachedSignature
+ *      Look at a PKCS7 contentInfo and check if the signature matches
+ *      a passed-in digest (calculated, supposedly, from detached contents).
+ *      The verification checks that the signing cert is valid and trusted
+ *      for the purpose specified by "certusage".
+ *
+ *      In addition, if "keepcerts" is true, add any new certificates found
+ *      into our local database.
+ */
+extern PRBool SEC_PKCS7VerifyDetachedSignature(SEC_PKCS7ContentInfo *cinfo,
+                                               SECCertUsage certusage,
+                                               const SECItem *detached_digest,
+                                               HASH_HashType digest_type,
+                                               PRBool keepcerts);
+
+/*
+ * SEC_PKCS7VerifyDetachedSignatureAtTime
+ *      Look at a PKCS7 contentInfo and check if the signature matches
+ *      a passed-in digest (calculated, supposedly, from detached contents).
+ *      The verification checks that the signing cert is valid and trusted
+ *      for the purpose specified by "certusage" at time "atTime".
+ *
+ *      In addition, if "keepcerts" is true, add any new certificates found
+ *      into our local database.
+ */
+extern PRBool
+SEC_PKCS7VerifyDetachedSignatureAtTime(SEC_PKCS7ContentInfo *cinfo,
+                                       SECCertUsage certusage,
+                                       const SECItem *detached_digest,
+                                       HASH_HashType digest_type,
+                                       PRBool keepcerts,
+                                       PRTime atTime);
+
+/*
+ * SEC_PKCS7GetSignerCommonName, SEC_PKCS7GetSignerEmailAddress
+ *      The passed-in contentInfo is espected to be Signed, and these
+ *      functions return the specified portion of the full signer name.
+ *
+ *      Returns a pointer to allocated memory, which must be freed.
+ *      A NULL return value is an error.
+ */
+extern char *SEC_PKCS7GetSignerCommonName(SEC_PKCS7ContentInfo *cinfo);
+extern char *SEC_PKCS7GetSignerEmailAddress(SEC_PKCS7ContentInfo *cinfo);
+
+/*
+ * Return the the signing time, in UTCTime format, of a PKCS7 contentInfo.
+ */
+extern SECItem *SEC_PKCS7GetSigningTime(SEC_PKCS7ContentInfo *cinfo);
+
+/************************************************************************
+ *      PKCS7 Creation and Encoding.
+ ************************************************************************/
+
+/*
+ * Start a PKCS7 signing context.
+ *
+ * "cert" is the cert that will be used to sign the data.  It will be
+ * checked for validity.
+ *
+ * "certusage" describes the signing usage (e.g. certUsageEmailSigner)
+ * XXX Maybe SECCertUsage should be split so that our caller just says
+ * "email" and *we* add the "signing" part -- otherwise our caller
+ * could be lying about the usage; we do not want to allow encryption
+ * certs for signing or vice versa.
+ *
+ * "certdb" is the cert database to use for verifying the cert.
+ * It can be NULL if a default database is available (like in the client).
+ *
+ * "digestalg" names the digest algorithm (e.g. SEC_OID_SHA1).
+ *
+ * "digest" is the actual digest of the data.  It must be provided in
+ * the case of detached data or NULL if the content will be included.
+ *
+ * The return value can be passed to functions which add things to
+ * it like attributes, then eventually to SEC_PKCS7Encode() or to
+ * SEC_PKCS7EncoderStart() to create the encoded data, and finally to
+ * SEC_PKCS7DestroyContentInfo().
+ *
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+extern SEC_PKCS7ContentInfo *
+SEC_PKCS7CreateSignedData(CERTCertificate *cert,
+                          SECCertUsage certusage,
+                          CERTCertDBHandle *certdb,
+                          SECOidTag digestalg,
+                          SECItem *digest,
+                          SECKEYGetPasswordKey pwfn, void *pwfn_arg);
+
+/*
+ * Create a PKCS7 certs-only container.
+ *
+ * "cert" is the (first) cert that will be included.
+ *
+ * "include_chain" specifies whether the entire chain for "cert" should
+ * be included.
+ *
+ * "certdb" is the cert database to use for finding the chain.
+ * It can be NULL in when "include_chain" is false, or when meaning
+ * use the default database.
+ *
+ * More certs and chains can be added via AddCertficate and AddCertChain.
+ *
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+extern SEC_PKCS7ContentInfo *
+SEC_PKCS7CreateCertsOnly(CERTCertificate *cert,
+                         PRBool include_chain,
+                         CERTCertDBHandle *certdb);
+
+/*
+ * Start a PKCS7 enveloping context.
+ *
+ * "cert" is the cert for the recipient.  It will be checked for validity.
+ *
+ * "certusage" describes the encryption usage (e.g. certUsageEmailRecipient)
+ * XXX Maybe SECCertUsage should be split so that our caller just says
+ * "email" and *we* add the "recipient" part -- otherwise our caller
+ * could be lying about the usage; we do not want to allow encryption
+ * certs for signing or vice versa.
+ *
+ * "certdb" is the cert database to use for verifying the cert.
+ * It can be NULL if a default database is available (like in the client).
+ *
+ * "encalg" specifies the bulk encryption algorithm to use (e.g. SEC_OID_RC2).
+ *
+ * "keysize" specifies the bulk encryption key size, in bits.
+ *
+ * The return value can be passed to functions which add things to
+ * it like more recipients, then eventually to SEC_PKCS7Encode() or to
+ * SEC_PKCS7EncoderStart() to create the encoded data, and finally to
+ * SEC_PKCS7DestroyContentInfo().
+ *
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+extern SEC_PKCS7ContentInfo *
+SEC_PKCS7CreateEnvelopedData(CERTCertificate *cert,
+                             SECCertUsage certusage,
+                             CERTCertDBHandle *certdb,
+                             SECOidTag encalg,
+                             int keysize,
+                             SECKEYGetPasswordKey pwfn, void *pwfn_arg);
+
+/*
+ * XXX There will be a similar routine for creating signedAndEnvelopedData.
+ * But its parameters will be different and I have no plans to implement
+ * it any time soon because we have no current need for it.
+ */
+
+/*
+ * Create an empty PKCS7 data content info.
+ *
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+extern SEC_PKCS7ContentInfo *SEC_PKCS7CreateData(void);
+
+/*
+ * Create an empty PKCS7 encrypted content info.
+ *
+ * "algorithm" specifies the bulk encryption algorithm to use.
+ *
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+extern SEC_PKCS7ContentInfo *
+SEC_PKCS7CreateEncryptedData(SECOidTag algorithm, int keysize,
+                             SECKEYGetPasswordKey pwfn, void *pwfn_arg);
+
+/*
+ * Create an empty PKCS7 encrypted content info.
+ *
+ * Similar to SEC_PKCS7CreateEncryptedData(), but this is capable of
+ * creating encrypted content for PKCS #5 v2 algorithms.
+ *
+ * "pbe_algorithm" specifies the PBE algorithm to use.
+ * "cipher_algorithm" specifies the bulk encryption algorithm to use.
+ * "prf_algorithm" specifies the PRF algorithm which pbe_algorithm uses.
+ *
+ * An error results in a return value of NULL and an error set.
+ * (Retrieve specific errors via PORT_GetError()/XP_GetError().)
+ */
+extern SEC_PKCS7ContentInfo *
+SEC_PKCS7CreateEncryptedDataWithPBEV2(SECOidTag pbe_algorithm,
+                                      SECOidTag cipher_algorithm,
+                                      SECOidTag prf_algorithm,
+                                      int keysize,
+                                      SECKEYGetPasswordKey pwfn, void *pwfn_arg);
+
+/*
+ * All of the following things return SECStatus to signal success or failure.
+ * Failure should have a more specific error status available via
+ * PORT_GetError()/XP_GetError().
+ */
+
+/*
+ * Add the specified attribute to the authenticated (i.e. signed) attributes
+ * of "cinfo" -- "oidtag" describes the attribute and "value" is the
+ * value to be associated with it.  NOTE! "value" must already be encoded;
+ * no interpretation of "oidtag" is done.  Also, it is assumed that this
+ * signedData has only one signer -- if we ever need to add attributes
+ * when there is more than one signature, we need a way to specify *which*
+ * signature should get the attribute.
+ *
+ * XXX Technically, a signed attribute can have multiple values; if/when
+ * we ever need to support an attribute which takes multiple values, we
+ * either need to change this interface or create an AddSignedAttributeValue
+ * which can be called subsequently, and would then append a value.
+ *
+ * "cinfo" should be of type signedData (the only kind of pkcs7 data
+ * that is allowed authenticated attributes); SECFailure will be returned
+ * if it is not.
+ */
+extern SECStatus SEC_PKCS7AddSignedAttribute(SEC_PKCS7ContentInfo *cinfo,
+                                             SECOidTag oidtag,
+                                             SECItem *value);
+
+/*
+ * Add "cert" and its entire chain to the set of certs included in "cinfo".
+ *
+ * "certdb" is the cert database to use for finding the chain.
+ * It can be NULL, meaning use the default database.
+ *
+ * "cinfo" should be of type signedData or signedAndEnvelopedData;
+ * SECFailure will be returned if it is not.
+ */
+extern SECStatus SEC_PKCS7AddCertChain(SEC_PKCS7ContentInfo *cinfo,
+                                       CERTCertificate *cert,
+                                       CERTCertDBHandle *certdb);
+
+/*
+ * Add "cert" to the set of certs included in "cinfo".
+ *
+ * "cinfo" should be of type signedData or signedAndEnvelopedData;
+ * SECFailure will be returned if it is not.
+ */
+extern SECStatus SEC_PKCS7AddCertificate(SEC_PKCS7ContentInfo *cinfo,
+                                         CERTCertificate *cert);
+
+/*
+ * Add another recipient to an encrypted message.
+ *
+ * "cinfo" should be of type envelopedData or signedAndEnvelopedData;
+ * SECFailure will be returned if it is not.
+ *
+ * "cert" is the cert for the recipient.  It will be checked for validity.
+ *
+ * "certusage" describes the encryption usage (e.g. certUsageEmailRecipient)
+ * XXX Maybe SECCertUsage should be split so that our caller just says
+ * "email" and *we* add the "recipient" part -- otherwise our caller
+ * could be lying about the usage; we do not want to allow encryption
+ * certs for signing or vice versa.
+ *
+ * "certdb" is the cert database to use for verifying the cert.
+ * It can be NULL if a default database is available (like in the client).
+ */
+extern SECStatus SEC_PKCS7AddRecipient(SEC_PKCS7ContentInfo *cinfo,
+                                       CERTCertificate *cert,
+                                       SECCertUsage certusage,
+                                       CERTCertDBHandle *certdb);
+
+/*
+ * Add the signing time to the authenticated (i.e. signed) attributes
+ * of "cinfo".  This is expected to be included in outgoing signed
+ * messages for email (S/MIME) but is likely useful in other situations.
+ *
+ * This should only be added once; a second call will either do
+ * nothing or replace an old signing time with a newer one.
+ *
+ * XXX This will probably just shove the current time into "cinfo"
+ * but it will not actually get signed until the entire item is
+ * processed for encoding.  Is this (expected to be small) delay okay?
+ *
+ * "cinfo" should be of type signedData (the only kind of pkcs7 data
+ * that is allowed authenticated attributes); SECFailure will be returned
+ * if it is not.
+ */
+extern SECStatus SEC_PKCS7AddSigningTime(SEC_PKCS7ContentInfo *cinfo);
+
+/*
+ * Add the signer's symmetric capabilities to the authenticated
+ * (i.e. signed) attributes of "cinfo".  This is expected to be
+ * included in outgoing signed messages for email (S/MIME).
+ *
+ * This can only be added once; a second call will return SECFailure.
+ *
+ * "cinfo" should be of type signedData or signedAndEnvelopedData;
+ * SECFailure will be returned if it is not.
+ */
+extern SECStatus SEC_PKCS7AddSymmetricCapabilities(SEC_PKCS7ContentInfo *cinfo);
+
+/*
+ * Mark that the signer's certificate and its issuing chain should
+ * be included in the encoded data.  This is expected to be used
+ * in outgoing signed messages for email (S/MIME).
+ *
+ * "certdb" is the cert database to use for finding the chain.
+ * It can be NULL, meaning use the default database.
+ *
+ * "cinfo" should be of type signedData or signedAndEnvelopedData;
+ * SECFailure will be returned if it is not.
+ */
+extern SECStatus SEC_PKCS7IncludeCertChain(SEC_PKCS7ContentInfo *cinfo,
+                                           CERTCertDBHandle *certdb);
+
+/*
+ * Set the content; it will be included and also hashed and/or encrypted
+ * as appropriate.  This is for in-memory content (expected to be "small")
+ * that will be included in the PKCS7 object.  All others should stream the
+ * content through when encoding (see SEC_PKCS7Encoder{Start,Update,Finish}).
+ *
+ * "buf" points to data of length "len"; it will be copied.
+ */
+extern SECStatus SEC_PKCS7SetContent(SEC_PKCS7ContentInfo *cinfo,
+                                     const char *buf, unsigned long len);
+
+/*
+ * Encode a PKCS7 object, in one shot.  All necessary components
+ * of the object must already be specified.  Either the data has
+ * already been included (via SetContent), or the data is detached,
+ * or there is no data at all (certs-only).
+ *
+ * "cinfo" specifies the object to be encoded.
+ *
+ * "outputfn" is where the encoded bytes will be passed.
+ *
+ * "outputarg" is an opaque argument to the above callback.
+ *
+ * "bulkkey" specifies the bulk encryption key to use.   This argument
+ * can be NULL if no encryption is being done, or if the bulk key should
+ * be generated internally (usually the case for EnvelopedData but never
+ * for EncryptedData, which *must* provide a bulk encryption key).
+ *
+ * "pwfn" is a callback for getting the password which protects the
+ * private key of the signer.  This argument can be NULL if it is known
+ * that no signing is going to be done.
+ *
+ * "pwfnarg" is an opaque argument to the above callback.
+ */
+extern SECStatus SEC_PKCS7Encode(SEC_PKCS7ContentInfo *cinfo,
+                                 SEC_PKCS7EncoderOutputCallback outputfn,
+                                 void *outputarg,
+                                 PK11SymKey *bulkkey,
+                                 SECKEYGetPasswordKey pwfn,
+                                 void *pwfnarg);
+
+/*
+ * Encode a PKCS7 object, in one shot.  All necessary components
+ * of the object must already be specified.  Either the data has
+ * already been included (via SetContent), or the data is detached,
+ * or there is no data at all (certs-only).  The output, rather than
+ * being passed to an output function as is done above, is all put
+ * into a SECItem.
+ *
+ * "pool" specifies a pool from which to allocate the result.
+ * It can be NULL, in which case memory is allocated generically.
+ *
+ * "dest" specifies a SECItem in which to put the result data.
+ * It can be NULL, in which case the entire item is allocated, too.
+ *
+ * "cinfo" specifies the object to be encoded.
+ *
+ * "bulkkey" specifies the bulk encryption key to use.   This argument
+ * can be NULL if no encryption is being done, or if the bulk key should
+ * be generated internally (usually the case for EnvelopedData but never
+ * for EncryptedData, which *must* provide a bulk encryption key).
+ *
+ * "pwfn" is a callback for getting the password which protects the
+ * private key of the signer.  This argument can be NULL if it is known
+ * that no signing is going to be done.
+ *
+ * "pwfnarg" is an opaque argument to the above callback.
+ */
+extern SECItem *SEC_PKCS7EncodeItem(PLArenaPool *pool,
+                                    SECItem *dest,
+                                    SEC_PKCS7ContentInfo *cinfo,
+                                    PK11SymKey *bulkkey,
+                                    SECKEYGetPasswordKey pwfn,
+                                    void *pwfnarg);
+
+/*
+ * For those who want to simply point to the pkcs7 contentInfo ASN.1
+ * template, and *not* call the encoding functions directly, the
+ * following function can be used -- after it is called, the entire
+ * PKCS7 contentInfo is ready to be encoded.
+ */
+extern SECStatus SEC_PKCS7PrepareForEncode(SEC_PKCS7ContentInfo *cinfo,
+                                           PK11SymKey *bulkkey,
+                                           SECKEYGetPasswordKey pwfn,
+                                           void *pwfnarg);
+
+/*
+ * Start the process of encoding a PKCS7 object.  The first part of
+ * the encoded object will be passed to the output function right away;
+ * after that it is expected that SEC_PKCS7EncoderUpdate will be called,
+ * streaming in the actual content that is getting included as well as
+ * signed or encrypted (or both).
+ *
+ * "cinfo" specifies the object to be encoded.
+ *
+ * "outputfn" is where the encoded bytes will be passed.
+ *
+ * "outputarg" is an opaque argument to the above callback.
+ *
+ * "bulkkey" specifies the bulk encryption key to use.   This argument
+ * can be NULL if no encryption is being done, or if the bulk key should
+ * be generated internally (usually the case for EnvelopedData but never
+ * for EncryptedData, which *must* provide a bulk encryption key).
+ *
+ * Returns an object to be passed to EncoderUpdate and EncoderFinish.
+ */
+extern SEC_PKCS7EncoderContext *
+SEC_PKCS7EncoderStart(SEC_PKCS7ContentInfo *cinfo,
+                      SEC_PKCS7EncoderOutputCallback outputfn,
+                      void *outputarg,
+                      PK11SymKey *bulkkey);
+
+/*
+ * Encode more contents, hashing and/or encrypting along the way.
+ */
+extern SECStatus SEC_PKCS7EncoderUpdate(SEC_PKCS7EncoderContext *p7ecx,
+                                        const char *buf,
+                                        unsigned long len);
+
+/*
+ * No more contents; finish the signature creation, if appropriate,
+ * and then the encoding.
+ *
+ * "pwfn" is a callback for getting the password which protects the
+ * signer's private key.  This argument can be NULL if it is known
+ * that no signing is going to be done.
+ *
+ * "pwfnarg" is an opaque argument to the above callback.
+ */
+extern SECStatus SEC_PKCS7EncoderFinish(SEC_PKCS7EncoderContext *p7ecx,
+                                        SECKEYGetPasswordKey pwfn,
+                                        void *pwfnarg);
+
+/*  Abort the underlying ASN.1 stream & set an error  */
+void SEC_PKCS7EncoderAbort(SEC_PKCS7EncoderContext *p7dcx, int error);
+
+/* retrieve the algorithm ID used to encrypt the content info
+ * for encrypted and enveloped data.  The SECAlgorithmID pointer
+ * returned needs to be freed as it is a copy of the algorithm
+ * id in the content info.
+ */
+extern SECAlgorithmID *
+SEC_PKCS7GetEncryptionAlgorithm(SEC_PKCS7ContentInfo *cinfo);
+
+/* the content of an encrypted data content info is encrypted.
+ * it is assumed that for encrypted data, that the data has already
+ * been set and is in the "plainContent" field of the content info.
+ *
+ * cinfo is the content info to encrypt
+ *
+ * key is the key with which to perform the encryption.  if the
+ *     algorithm is a password based encryption algorithm, the
+ *     key is actually a password which will be processed per
+ *     PKCS #5.
+ *
+ * in the event of an error, SECFailure is returned.  SECSuccess
+ * indicates a success.
+ */
+extern SECStatus
+SEC_PKCS7EncryptContents(PLArenaPool *poolp,
+                         SEC_PKCS7ContentInfo *cinfo,
+                         SECItem *key,
+                         void *wincx);
+
+/* the content of an encrypted data content info is decrypted.
+ * it is assumed that for encrypted data, that the data has already
+ * been set and is in the "encContent" field of the content info.
+ *
+ * cinfo is the content info to decrypt
+ *
+ * key is the key with which to perform the decryption.  if the
+ *     algorithm is a password based encryption algorithm, the
+ *     key is actually a password which will be processed per
+ *     PKCS #5.
+ *
+ * in the event of an error, SECFailure is returned.  SECSuccess
+ * indicates a success.
+ */
+extern SECStatus
+SEC_PKCS7DecryptContents(PLArenaPool *poolp,
+                         SEC_PKCS7ContentInfo *cinfo,
+                         SECItem *key,
+                         void *wincx);
+
+/* retrieve the certificate list from the content info.  the list
+ * is a pointer to the list in the content info.  this should not
+ * be deleted or freed in any way short of calling
+ * SEC_PKCS7DestroyContentInfo
+ */
+extern SECItem **
+SEC_PKCS7GetCertificateList(SEC_PKCS7ContentInfo *cinfo);
+
+/* Returns the key length (in bits) of the algorithm used to encrypt
+   this object.  Returns 0 if it's not encrypted, or the key length is
+   irrelevant. */
+extern int
+SEC_PKCS7GetKeyLength(SEC_PKCS7ContentInfo *cinfo);
+
+/************************************************************************/
+SEC_END_PROTOS
+
+#endif /* _SECPKCS7_H_ */