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-rw-r--r--svl/source/crypto/cryptosign.cxx2374
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diff --git a/svl/source/crypto/cryptosign.cxx b/svl/source/crypto/cryptosign.cxx
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+++ b/svl/source/crypto/cryptosign.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * 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 <sal/config.h>
+
+#include <algorithm>
+
+#include <svl/cryptosign.hxx>
+#include <svl/sigstruct.hxx>
+#include <config_crypto.h>
+
+#include <rtl/character.hxx>
+#include <rtl/strbuf.hxx>
+#include <rtl/string.hxx>
+#include <sal/log.hxx>
+#include <tools/datetime.hxx>
+#include <tools/stream.hxx>
+#include <comphelper/base64.hxx>
+#include <comphelper/hash.hxx>
+#include <comphelper/processfactory.hxx>
+#include <comphelper/random.hxx>
+#include <comphelper/scopeguard.hxx>
+#include <com/sun/star/security/XCertificate.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <o3tl/char16_t2wchar_t.hxx>
+
+#if USE_CRYPTO_NSS
+// NSS headers for PDF signing
+#include <cert.h>
+#include <keyhi.h>
+#include <pk11pub.h>
+#include <hasht.h>
+#include <secerr.h>
+#include <sechash.h>
+#include <cms.h>
+#include <cmst.h>
+
+// We use curl for RFC3161 time stamp requests
+#include <curl/curl.h>
+
+#include <com/sun/star/xml/crypto/DigestID.hpp>
+#include <com/sun/star/xml/crypto/NSSInitializer.hpp>
+#include <mutex>
+#endif
+
+#if USE_CRYPTO_MSCAPI
+// WinCrypt headers for PDF signing
+// Note: this uses Windows 7 APIs and requires the relevant data types
+#include <prewin.h>
+#include <wincrypt.h>
+#include <postwin.h>
+#include <comphelper/windowserrorstring.hxx>
+#endif
+
+using namespace com::sun::star;
+
+namespace {
+
+#if USE_CRYPTO_ANY
+void appendHex( sal_Int8 nInt, OStringBuffer& rBuffer )
+{
+ static const char pHexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7',
+ '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
+ rBuffer.append( pHexDigits[ (nInt >> 4) & 15 ] );
+ rBuffer.append( pHexDigits[ nInt & 15 ] );
+}
+#endif
+
+#if USE_CRYPTO_NSS
+char *PDFSigningPKCS7PasswordCallback(PK11SlotInfo * /*slot*/, PRBool /*retry*/, void *arg)
+{
+ return PL_strdup(static_cast<char *>(arg));
+}
+
+// ASN.1 used in the (much simpler) time stamp request. From RFC3161
+// and other sources.
+
+/*
+AlgorithmIdentifier ::= SEQUENCE {
+ algorithm OBJECT IDENTIFIER,
+ parameters ANY DEFINED BY algorithm OPTIONAL }
+ -- contains a value of the type
+ -- registered for use with the
+ -- algorithm object identifier value
+
+MessageImprint ::= SEQUENCE {
+ hashAlgorithm AlgorithmIdentifier,
+ hashedMessage OCTET STRING }
+*/
+
+struct MessageImprint {
+ SECAlgorithmID hashAlgorithm;
+ SECItem hashedMessage;
+};
+
+/*
+Extension ::= SEQUENCE {
+ extnID OBJECT IDENTIFIER,
+ critical BOOLEAN DEFAULT FALSE,
+ extnValue OCTET STRING }
+*/
+
+struct Extension {
+ SECItem extnID;
+ SECItem critical;
+ SECItem extnValue;
+};
+
+/*
+Extensions ::= SEQUENCE SIZE (1..MAX) OF Extension
+*/
+
+/*
+TSAPolicyId ::= OBJECT IDENTIFIER
+
+TimeStampReq ::= SEQUENCE {
+ version INTEGER { v1(1) },
+ messageImprint MessageImprint,
+ --a hash algorithm OID and the hash value of the data to be
+ --time-stamped
+ reqPolicy TSAPolicyId OPTIONAL,
+ nonce INTEGER OPTIONAL,
+ certReq BOOLEAN DEFAULT FALSE,
+ extensions [0] IMPLICIT Extensions OPTIONAL }
+*/
+
+struct TimeStampReq {
+ SECItem version;
+ MessageImprint messageImprint;
+ SECItem reqPolicy;
+ SECItem nonce;
+ SECItem certReq;
+ Extension *extensions;
+};
+
+/**
+ * General name, defined by RFC 3280.
+ */
+struct GeneralName
+{
+ CERTName name;
+};
+
+/**
+ * List of general names (only one for now), defined by RFC 3280.
+ */
+struct GeneralNames
+{
+ GeneralName names;
+};
+
+/**
+ * Supplies different fields to identify a certificate, defined by RFC 5035.
+ */
+struct IssuerSerial
+{
+ GeneralNames issuer;
+ SECItem serialNumber;
+};
+
+/**
+ * Supplies different fields that are used to identify certificates, defined by
+ * RFC 5035.
+ */
+struct ESSCertIDv2
+{
+ SECAlgorithmID hashAlgorithm;
+ SECItem certHash;
+ IssuerSerial issuerSerial;
+};
+
+/**
+ * This attribute uses the ESSCertIDv2 structure, defined by RFC 5035.
+ */
+struct SigningCertificateV2
+{
+ ESSCertIDv2** certs;
+
+ SigningCertificateV2()
+ : certs(nullptr)
+ {
+ }
+};
+
+/**
+ * GeneralName ::= CHOICE {
+ * otherName [0] OtherName,
+ * rfc822Name [1] IA5String,
+ * dNSName [2] IA5String,
+ * x400Address [3] ORAddress,
+ * directoryName [4] Name,
+ * ediPartyName [5] EDIPartyName,
+ * uniformResourceIdentifier [6] IA5String,
+ * iPAddress [7] OCTET STRING,
+ * registeredID [8] OBJECT IDENTIFIER
+ * }
+ */
+const SEC_ASN1Template GeneralNameTemplate[] =
+{
+ {SEC_ASN1_SEQUENCE, 0, nullptr, sizeof(GeneralName)},
+ {SEC_ASN1_INLINE, offsetof(GeneralName, name), CERT_NameTemplate, 0},
+ {0, 0, nullptr, 0}
+};
+
+/**
+ * GeneralNames ::= SEQUENCE SIZE (1..MAX) OF GeneralName
+ */
+const SEC_ASN1Template GeneralNamesTemplate[] =
+{
+ {SEC_ASN1_SEQUENCE, 0, nullptr, sizeof(GeneralNames)},
+ {SEC_ASN1_INLINE | SEC_ASN1_CONTEXT_SPECIFIC | 4, offsetof(GeneralNames, names), GeneralNameTemplate, 0},
+ {0, 0, nullptr, 0}
+};
+
+/**
+ * IssuerSerial ::= SEQUENCE {
+ * issuer GeneralNames,
+ * serialNumber CertificateSerialNumber
+ * }
+ */
+const SEC_ASN1Template IssuerSerialTemplate[] =
+{
+ {SEC_ASN1_SEQUENCE, 0, nullptr, sizeof(IssuerSerial)},
+ {SEC_ASN1_INLINE, offsetof(IssuerSerial, issuer), GeneralNamesTemplate, 0},
+ {SEC_ASN1_INTEGER, offsetof(IssuerSerial, serialNumber), nullptr, 0},
+ {0, 0, nullptr, 0}
+};
+
+
+/**
+ * Hash ::= OCTET STRING
+ *
+ * ESSCertIDv2 ::= SEQUENCE {
+ * hashAlgorithm AlgorithmIdentifier DEFAULT {algorithm id-sha256},
+ * certHash Hash,
+ * issuerSerial IssuerSerial OPTIONAL
+ * }
+ */
+
+SEC_ASN1_MKSUB(SECOID_AlgorithmIDTemplate)
+
+const SEC_ASN1Template ESSCertIDv2Template[] =
+{
+ {SEC_ASN1_SEQUENCE, 0, nullptr, sizeof(ESSCertIDv2)},
+ {SEC_ASN1_INLINE | SEC_ASN1_XTRN, offsetof(ESSCertIDv2, hashAlgorithm), SEC_ASN1_SUB(SECOID_AlgorithmIDTemplate), 0},
+ {SEC_ASN1_OCTET_STRING, offsetof(ESSCertIDv2, certHash), nullptr, 0},
+ {SEC_ASN1_INLINE | SEC_ASN1_XTRN, offsetof(ESSCertIDv2, issuerSerial), IssuerSerialTemplate, 0},
+ {0, 0, nullptr, 0}
+};
+
+/**
+ * SigningCertificateV2 ::= SEQUENCE {
+ * }
+ */
+const SEC_ASN1Template SigningCertificateV2Template[] =
+{
+ {SEC_ASN1_SEQUENCE, 0, nullptr, sizeof(SigningCertificateV2)},
+ {SEC_ASN1_SEQUENCE_OF, offsetof(SigningCertificateV2, certs), ESSCertIDv2Template, 0},
+ {0, 0, nullptr, 0}
+};
+
+struct PKIStatusInfo {
+ SECItem status;
+ SECItem statusString;
+ SECItem failInfo;
+};
+
+const SEC_ASN1Template PKIStatusInfo_Template[] =
+{
+ { SEC_ASN1_SEQUENCE, 0, nullptr, sizeof(PKIStatusInfo) },
+ { SEC_ASN1_INTEGER, offsetof(PKIStatusInfo, status), nullptr, 0 },
+ { SEC_ASN1_CONSTRUCTED | SEC_ASN1_SEQUENCE | SEC_ASN1_OPTIONAL, offsetof(PKIStatusInfo, statusString), nullptr, 0 },
+ { SEC_ASN1_BIT_STRING | SEC_ASN1_OPTIONAL, offsetof(PKIStatusInfo, failInfo), nullptr, 0 },
+ { 0, 0, nullptr, 0 }
+};
+
+const SEC_ASN1Template Any_Template[] =
+{
+ { SEC_ASN1_ANY, 0, nullptr, sizeof(SECItem) }
+};
+
+struct TimeStampResp {
+ PKIStatusInfo status;
+ SECItem timeStampToken;
+};
+
+const SEC_ASN1Template TimeStampResp_Template[] =
+{
+ { SEC_ASN1_SEQUENCE, 0, nullptr, sizeof(TimeStampResp) },
+ { SEC_ASN1_INLINE, offsetof(TimeStampResp, status), PKIStatusInfo_Template, 0 },
+ { SEC_ASN1_ANY | SEC_ASN1_OPTIONAL, offsetof(TimeStampResp, timeStampToken), Any_Template, 0 },
+ { 0, 0, nullptr, 0 }
+};
+
+const SEC_ASN1Template MessageImprint_Template[] =
+{
+ { SEC_ASN1_SEQUENCE, 0, nullptr, sizeof(MessageImprint) },
+ { SEC_ASN1_INLINE, offsetof(MessageImprint, hashAlgorithm), SECOID_AlgorithmIDTemplate, 0 },
+ { SEC_ASN1_OCTET_STRING, offsetof(MessageImprint, hashedMessage), nullptr, 0 },
+ { 0, 0, nullptr, 0 }
+};
+
+const SEC_ASN1Template Extension_Template[] =
+{
+ { SEC_ASN1_SEQUENCE, 0, nullptr, sizeof(Extension) },
+ { SEC_ASN1_OBJECT_ID, offsetof(Extension, extnID), nullptr, 0 },
+ { SEC_ASN1_BOOLEAN, offsetof(Extension, critical), nullptr, 0 },
+ { SEC_ASN1_OCTET_STRING, offsetof(Extension, extnValue), nullptr, 0 },
+ { 0, 0, nullptr, 0 }
+};
+
+const SEC_ASN1Template Extensions_Template[] =
+{
+ { SEC_ASN1_SEQUENCE_OF, 0, Extension_Template, 0 }
+};
+
+const SEC_ASN1Template TimeStampReq_Template[] =
+{
+ { SEC_ASN1_SEQUENCE, 0, nullptr, sizeof(TimeStampReq) },
+ { SEC_ASN1_INTEGER, offsetof(TimeStampReq, version), nullptr, 0 },
+ { SEC_ASN1_INLINE, offsetof(TimeStampReq, messageImprint), MessageImprint_Template, 0 },
+ { SEC_ASN1_OBJECT_ID | SEC_ASN1_OPTIONAL, offsetof(TimeStampReq, reqPolicy), nullptr, 0 },
+ { SEC_ASN1_INTEGER | SEC_ASN1_OPTIONAL, offsetof(TimeStampReq, nonce), nullptr, 0 },
+ { SEC_ASN1_BOOLEAN | SEC_ASN1_OPTIONAL, offsetof(TimeStampReq, certReq), nullptr, 0 },
+ { SEC_ASN1_OPTIONAL | SEC_ASN1_CONTEXT_SPECIFIC | 0, offsetof(TimeStampReq, extensions), Extensions_Template, 0 },
+ { 0, 0, nullptr, 0 }
+};
+
+size_t AppendToBuffer(char const *ptr, size_t size, size_t nmemb, void *userdata)
+{
+ OStringBuffer *pBuffer = static_cast<OStringBuffer*>(userdata);
+ pBuffer->append(ptr, size*nmemb);
+
+ return size*nmemb;
+}
+
+OUString PKIStatusToString(int n)
+{
+ switch (n)
+ {
+ case 0: return "granted";
+ case 1: return "grantedWithMods";
+ case 2: return "rejection";
+ case 3: return "waiting";
+ case 4: return "revocationWarning";
+ case 5: return "revocationNotification";
+ default: return "unknown (" + OUString::number(n) + ")";
+ }
+}
+
+OUString PKIStatusInfoToString(const PKIStatusInfo& rStatusInfo)
+{
+ OUString result = "{status=";
+ if (rStatusInfo.status.len == 1)
+ result += PKIStatusToString(rStatusInfo.status.data[0]);
+ else
+ result += "unknown (len=" + OUString::number(rStatusInfo.status.len);
+
+ // FIXME: Perhaps look at rStatusInfo.statusString.data but note
+ // that we of course can't assume it contains proper UTF-8. After
+ // all, it is data from an external source. Also, RFC3161 claims
+ // it should be a SEQUENCE (1..MAX) OF UTF8String, but another
+ // source claimed it would be a single UTF8String, hmm?
+
+ // FIXME: Worth it to decode failInfo to cleartext, probably not at least as long as this is only for a SAL_INFO
+
+ result += "}";
+
+ return result;
+}
+
+// SEC_StringToOID() and NSS_CMSSignerInfo_AddUnauthAttr() are
+// not exported from libsmime, so copy them here. Sigh.
+
+SECStatus
+my_SEC_StringToOID(SECItem *to, const char *from, PRUint32 len)
+{
+ PRUint32 decimal_numbers = 0;
+ PRUint32 result_bytes = 0;
+ SECStatus rv;
+ PRUint8 result[1024];
+
+ static const PRUint32 max_decimal = 0xffffffff / 10;
+ static const char OIDstring[] = {"OID."};
+
+ if (!from || !to) {
+ PORT_SetError(SEC_ERROR_INVALID_ARGS);
+ return SECFailure;
+ }
+ if (!len) {
+ len = PL_strlen(from);
+ }
+ if (len >= 4 && !PL_strncasecmp(from, OIDstring, 4)) {
+ from += 4; /* skip leading "OID." if present */
+ len -= 4;
+ }
+ if (!len) {
+bad_data:
+ PORT_SetError(SEC_ERROR_BAD_DATA);
+ return SECFailure;
+ }
+ do {
+ PRUint32 decimal = 0;
+ while (len > 0 && rtl::isAsciiDigit(static_cast<unsigned char>(*from))) {
+ PRUint32 addend = *from++ - '0';
+ --len;
+ if (decimal > max_decimal) /* overflow */
+ goto bad_data;
+ decimal = (decimal * 10) + addend;
+ if (decimal < addend) /* overflow */
+ goto bad_data;
+ }
+ if (len != 0 && *from != '.') {
+ goto bad_data;
+ }
+ if (decimal_numbers == 0) {
+ if (decimal > 2)
+ goto bad_data;
+ result[0] = decimal * 40;
+ result_bytes = 1;
+ } else if (decimal_numbers == 1) {
+ if (decimal > 40)
+ goto bad_data;
+ result[0] += decimal;
+ } else {
+ /* encode the decimal number, */
+ PRUint8 * rp;
+ PRUint32 num_bytes = 0;
+ PRUint32 tmp = decimal;
+ while (tmp) {
+ num_bytes++;
+ tmp >>= 7;
+ }
+ if (!num_bytes )
+ ++num_bytes; /* use one byte for a zero value */
+ if (num_bytes + result_bytes > sizeof result)
+ goto bad_data;
+ tmp = num_bytes;
+ rp = result + result_bytes - 1;
+ rp[tmp] = static_cast<PRUint8>(decimal & 0x7f);
+ decimal >>= 7;
+ while (--tmp > 0) {
+ rp[tmp] = static_cast<PRUint8>(decimal | 0x80);
+ decimal >>= 7;
+ }
+ result_bytes += num_bytes;
+ }
+ ++decimal_numbers;
+ if (len > 0) { /* skip trailing '.' */
+ ++from;
+ --len;
+ }
+ } while (len > 0);
+ /* now result contains result_bytes of data */
+ if (to->data && to->len >= result_bytes) {
+ to->len = result_bytes;
+ PORT_Memcpy(to->data, result, to->len);
+ rv = SECSuccess;
+ } else {
+ SECItem result_item = {siBuffer, nullptr, 0 };
+ result_item.data = result;
+ result_item.len = result_bytes;
+ rv = SECITEM_CopyItem(nullptr, to, &result_item);
+ }
+ return rv;
+}
+
+NSSCMSAttribute *
+my_NSS_CMSAttributeArray_FindAttrByOidTag(NSSCMSAttribute **attrs, SECOidTag oidtag, PRBool only)
+{
+ SECOidData *oid;
+ NSSCMSAttribute *attr1, *attr2;
+
+ if (attrs == nullptr)
+ return nullptr;
+
+ oid = SECOID_FindOIDByTag(oidtag);
+ if (oid == nullptr)
+ return nullptr;
+
+ while ((attr1 = *attrs++) != nullptr) {
+ if (attr1->type.len == oid->oid.len && PORT_Memcmp (attr1->type.data,
+ oid->oid.data,
+ oid->oid.len) == 0)
+ break;
+ }
+
+ if (attr1 == nullptr)
+ return nullptr;
+
+ if (!only)
+ return attr1;
+
+ while ((attr2 = *attrs++) != nullptr) {
+ if (attr2->type.len == oid->oid.len && PORT_Memcmp (attr2->type.data,
+ oid->oid.data,
+ oid->oid.len) == 0)
+ break;
+ }
+
+ if (attr2 != nullptr)
+ return nullptr;
+
+ return attr1;
+}
+
+SECStatus
+my_NSS_CMSArray_Add(PLArenaPool *poolp, void ***array, void *obj)
+{
+ int n = 0;
+ void **dest;
+
+ PORT_Assert(array != NULL);
+ if (array == nullptr)
+ return SECFailure;
+
+ if (*array == nullptr) {
+ dest = static_cast<void **>(PORT_ArenaAlloc(poolp, 2 * sizeof(void *)));
+ } else {
+ void **p = *array;
+ while (*p++)
+ n++;
+ dest = static_cast<void **>(PORT_ArenaGrow (poolp,
+ *array,
+ (n + 1) * sizeof(void *),
+ (n + 2) * sizeof(void *)));
+ }
+
+ if (dest == nullptr)
+ return SECFailure;
+
+ dest[n] = obj;
+ dest[n+1] = nullptr;
+ *array = dest;
+ return SECSuccess;
+}
+
+SECOidTag
+my_NSS_CMSAttribute_GetType(const NSSCMSAttribute *attr)
+{
+ SECOidData *typetag;
+
+ typetag = SECOID_FindOID(&(attr->type));
+ if (typetag == nullptr)
+ return SEC_OID_UNKNOWN;
+
+ return typetag->offset;
+}
+
+SECStatus
+my_NSS_CMSAttributeArray_AddAttr(PLArenaPool *poolp, NSSCMSAttribute ***attrs, NSSCMSAttribute *attr)
+{
+ NSSCMSAttribute *oattr;
+ void *mark;
+ SECOidTag type;
+
+ mark = PORT_ArenaMark(poolp);
+
+ /* find oidtag of attr */
+ type = my_NSS_CMSAttribute_GetType(attr);
+
+ /* see if we have one already */
+ oattr = my_NSS_CMSAttributeArray_FindAttrByOidTag(*attrs, type, PR_FALSE);
+ PORT_Assert (oattr == NULL);
+ if (oattr != nullptr)
+ goto loser; /* XXX or would it be better to replace it? */
+
+ /* no, shove it in */
+ if (my_NSS_CMSArray_Add(poolp, reinterpret_cast<void ***>(attrs), static_cast<void *>(attr)) != SECSuccess)
+ goto loser;
+
+ PORT_ArenaUnmark(poolp, mark);
+ return SECSuccess;
+
+loser:
+ PORT_ArenaRelease(poolp, mark);
+ return SECFailure;
+}
+
+SECStatus
+my_NSS_CMSSignerInfo_AddUnauthAttr(NSSCMSSignerInfo *signerinfo, NSSCMSAttribute *attr)
+{
+ return my_NSS_CMSAttributeArray_AddAttr(signerinfo->cmsg->poolp, &(signerinfo->unAuthAttr), attr);
+}
+
+SECStatus
+my_NSS_CMSSignerInfo_AddAuthAttr(NSSCMSSignerInfo *signerinfo, NSSCMSAttribute *attr)
+{
+ return my_NSS_CMSAttributeArray_AddAttr(signerinfo->cmsg->poolp, &(signerinfo->authAttr), attr);
+}
+
+NSSCMSMessage *CreateCMSMessage(const PRTime* time,
+ NSSCMSSignedData **cms_sd,
+ NSSCMSSignerInfo **cms_signer,
+ CERTCertificate *cert,
+ SECItem *digest)
+{
+ NSSCMSMessage *result = NSS_CMSMessage_Create(nullptr);
+ if (!result)
+ {
+ SAL_WARN("svl.crypto", "NSS_CMSMessage_Create failed");
+ return nullptr;
+ }
+
+ *cms_sd = NSS_CMSSignedData_Create(result);
+ if (!*cms_sd)
+ {
+ SAL_WARN("svl.crypto", "NSS_CMSSignedData_Create failed");
+ NSS_CMSMessage_Destroy(result);
+ return nullptr;
+ }
+
+ NSSCMSContentInfo *cms_cinfo = NSS_CMSMessage_GetContentInfo(result);
+ if (NSS_CMSContentInfo_SetContent_SignedData(result, cms_cinfo, *cms_sd) != SECSuccess)
+ {
+ SAL_WARN("svl.crypto", "NSS_CMSContentInfo_SetContent_SignedData failed");
+ NSS_CMSSignedData_Destroy(*cms_sd);
+ NSS_CMSMessage_Destroy(result);
+ return nullptr;
+ }
+
+ cms_cinfo = NSS_CMSSignedData_GetContentInfo(*cms_sd);
+
+ // Attach NULL data as detached data
+ if (NSS_CMSContentInfo_SetContent_Data(result, cms_cinfo, nullptr, PR_TRUE) != SECSuccess)
+ {
+ SAL_WARN("svl.crypto", "NSS_CMSContentInfo_SetContent_Data failed");
+ NSS_CMSSignedData_Destroy(*cms_sd);
+ NSS_CMSMessage_Destroy(result);
+ return nullptr;
+ }
+
+ // workaround: with legacy "dbm:", NSS can't find the private key - try out
+ // if it works, and fallback if it doesn't.
+ if (SECKEYPrivateKey * pPrivateKey = PK11_FindKeyByAnyCert(cert, nullptr))
+ {
+ SECKEY_DestroyPrivateKey(pPrivateKey);
+ *cms_signer = NSS_CMSSignerInfo_Create(result, cert, SEC_OID_SHA256);
+ }
+ else
+ {
+ pPrivateKey = PK11_FindKeyByDERCert(cert->slot, cert, nullptr);
+ SECKEYPublicKey *const pPublicKey = CERT_ExtractPublicKey(cert);
+ if (pPublicKey && pPrivateKey)
+ {
+ *cms_signer = NSS_CMSSignerInfo_CreateWithSubjKeyID(result, &cert->subjectKeyID, pPublicKey, pPrivateKey, SEC_OID_SHA256);
+ SECKEY_DestroyPrivateKey(pPrivateKey);
+ SECKEY_DestroyPublicKey(pPublicKey);
+ if (*cms_signer)
+ {
+ // this is required in NSS_CMSSignerInfo_IncludeCerts()
+ // (and NSS_CMSSignerInfo_GetSigningCertificate() doesn't work)
+ (**cms_signer).cert = CERT_DupCertificate(cert);
+ }
+ }
+ }
+ if (!*cms_signer)
+ {
+ SAL_WARN("svl.crypto", "NSS_CMSSignerInfo_Create failed");
+ NSS_CMSSignedData_Destroy(*cms_sd);
+ NSS_CMSMessage_Destroy(result);
+ return nullptr;
+ }
+
+ if (time && NSS_CMSSignerInfo_AddSigningTime(*cms_signer, *time) != SECSuccess)
+ {
+ SAL_WARN("svl.crypto", "NSS_CMSSignerInfo_AddSigningTime failed");
+ NSS_CMSSignedData_Destroy(*cms_sd);
+ NSS_CMSMessage_Destroy(result);
+ return nullptr;
+ }
+
+ if (NSS_CMSSignerInfo_IncludeCerts(*cms_signer, NSSCMSCM_CertChain, certUsageEmailSigner) != SECSuccess)
+ {
+ SAL_WARN("svl.crypto", "NSS_CMSSignerInfo_IncludeCerts failed");
+ NSS_CMSSignedData_Destroy(*cms_sd);
+ NSS_CMSMessage_Destroy(result);
+ return nullptr;
+ }
+
+ if (NSS_CMSSignedData_AddCertificate(*cms_sd, cert) != SECSuccess)
+ {
+ SAL_WARN("svl.crypto", "NSS_CMSSignedData_AddCertificate failed");
+ NSS_CMSSignedData_Destroy(*cms_sd);
+ NSS_CMSMessage_Destroy(result);
+ return nullptr;
+ }
+
+ if (NSS_CMSSignedData_AddSignerInfo(*cms_sd, *cms_signer) != SECSuccess)
+ {
+ SAL_WARN("svl.crypto", "NSS_CMSSignedData_AddSignerInfo failed");
+ NSS_CMSSignedData_Destroy(*cms_sd);
+ NSS_CMSMessage_Destroy(result);
+ return nullptr;
+ }
+
+ if (NSS_CMSSignedData_SetDigestValue(*cms_sd, SEC_OID_SHA256, digest) != SECSuccess)
+ {
+ SAL_WARN("svl.crypto", "NSS_CMSSignedData_SetDigestValue failed");
+ NSS_CMSSignedData_Destroy(*cms_sd);
+ NSS_CMSMessage_Destroy(result);
+ return nullptr;
+ }
+
+ return result;
+}
+
+#elif USE_CRYPTO_MSCAPI // ends USE_CRYPTO_NSS
+
+/// Counts how many bytes are needed to encode a given length.
+size_t GetDERLengthOfLength(size_t nLength)
+{
+ size_t nRet = 1;
+
+ if(nLength > 127)
+ {
+ while (nLength >> (nRet * 8))
+ ++nRet;
+ // Long form means one additional byte: the length of the length and
+ // the length itself.
+ ++nRet;
+ }
+ return nRet;
+}
+
+/// Writes the length part of the header.
+void WriteDERLength(SvStream& rStream, size_t nLength)
+{
+ size_t nLengthOfLength = GetDERLengthOfLength(nLength);
+ if (nLengthOfLength == 1)
+ {
+ // We can use the short form.
+ rStream.WriteUInt8(nLength);
+ return;
+ }
+
+ // 0x80 means that the we use the long form: the first byte is the length
+ // of length with the highest bit set to 1, not the actual length.
+ rStream.WriteUInt8(0x80 | (nLengthOfLength - 1));
+ for (size_t i = 1; i < nLengthOfLength; ++i)
+ rStream.WriteUInt8(nLength >> ((nLengthOfLength - i - 1) * 8));
+}
+
+const unsigned nASN1_INTEGER = 0x02;
+const unsigned nASN1_OCTET_STRING = 0x04;
+const unsigned nASN1_NULL = 0x05;
+const unsigned nASN1_OBJECT_IDENTIFIER = 0x06;
+const unsigned nASN1_SEQUENCE = 0x10;
+/// An explicit tag on a constructed value.
+const unsigned nASN1_TAGGED_CONSTRUCTED = 0xa0;
+const unsigned nASN1_CONSTRUCTED = 0x20;
+
+/// Create payload for the 'signing-certificate' signed attribute.
+bool CreateSigningCertificateAttribute(void const * pDerEncoded, int nDerEncoded, PCCERT_CONTEXT pCertContext, SvStream& rEncodedCertificate)
+{
+ // CryptEncodeObjectEx() does not support encoding arbitrary ASN.1
+ // structures, like SigningCertificateV2 from RFC 5035, so let's build it
+ // manually.
+
+ // Count the certificate hash and put it to aHash.
+ // 2.16.840.1.101.3.4.2.1, i.e. sha256.
+ std::vector<unsigned char> aSHA256{0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01};
+
+ HCRYPTPROV hProv = 0;
+ if (!CryptAcquireContextW(&hProv, nullptr, nullptr, PROV_RSA_AES, CRYPT_VERIFYCONTEXT))
+ {
+ SAL_WARN("svl.crypto", "CryptAcquireContext() failed");
+ return false;
+ }
+
+ HCRYPTHASH hHash = 0;
+ if (!CryptCreateHash(hProv, CALG_SHA_256, 0, 0, &hHash))
+ {
+ SAL_WARN("svl.crypto", "CryptCreateHash() failed");
+ return false;
+ }
+
+ if (!CryptHashData(hHash, static_cast<const BYTE*>(pDerEncoded), nDerEncoded, 0))
+ {
+ SAL_WARN("svl.crypto", "CryptHashData() failed");
+ return false;
+ }
+
+ DWORD nHash = 0;
+ if (!CryptGetHashParam(hHash, HP_HASHVAL, nullptr, &nHash, 0))
+ {
+ SAL_WARN("svl.crypto", "CryptGetHashParam() failed to provide the hash length");
+ return false;
+ }
+
+ std::vector<unsigned char> aHash(nHash);
+ if (!CryptGetHashParam(hHash, HP_HASHVAL, aHash.data(), &nHash, 0))
+ {
+ SAL_WARN("svl.crypto", "CryptGetHashParam() failed to provide the hash");
+ return false;
+ }
+
+ CryptDestroyHash(hHash);
+ CryptReleaseContext(hProv, 0);
+
+ // Collect info for IssuerSerial.
+ BYTE* pIssuer = pCertContext->pCertInfo->Issuer.pbData;
+ DWORD nIssuer = pCertContext->pCertInfo->Issuer.cbData;
+ BYTE* pSerial = pCertContext->pCertInfo->SerialNumber.pbData;
+ DWORD nSerial = pCertContext->pCertInfo->SerialNumber.cbData;
+ // pSerial is LE, aSerial is BE.
+ std::vector<BYTE> aSerial(nSerial);
+ for (size_t i = 0; i < nSerial; ++i)
+ aSerial[i] = *(pSerial + nSerial - i - 1);
+
+ // We now have all the info to count the lengths.
+ // The layout of the payload is:
+ // SEQUENCE: SigningCertificateV2
+ // SEQUENCE: SEQUENCE OF ESSCertIDv2
+ // SEQUENCE: ESSCertIDv2
+ // SEQUENCE: AlgorithmIdentifier
+ // OBJECT: algorithm
+ // NULL: parameters
+ // OCTET STRING: certHash
+ // SEQUENCE: IssuerSerial
+ // SEQUENCE: GeneralNames
+ // cont [ 4 ]: Name
+ // SEQUENCE: Issuer blob
+ // INTEGER: CertificateSerialNumber
+
+ size_t nAlgorithm = 1 + GetDERLengthOfLength(aSHA256.size()) + aSHA256.size();
+ size_t nParameters = 1 + GetDERLengthOfLength(1);
+ size_t nAlgorithmIdentifier = 1 + GetDERLengthOfLength(nAlgorithm + nParameters) + nAlgorithm + nParameters;
+ size_t nCertHash = 1 + GetDERLengthOfLength(aHash.size()) + aHash.size();
+ size_t nName = 1 + GetDERLengthOfLength(nIssuer) + nIssuer;
+ size_t nGeneralNames = 1 + GetDERLengthOfLength(nName) + nName;
+ size_t nCertificateSerialNumber = 1 + GetDERLengthOfLength(nSerial) + nSerial;
+ size_t nIssuerSerial = 1 + GetDERLengthOfLength(nGeneralNames + nCertificateSerialNumber) + nGeneralNames + nCertificateSerialNumber;
+ size_t nESSCertIDv2 = 1 + GetDERLengthOfLength(nAlgorithmIdentifier + nCertHash + nIssuerSerial) + nAlgorithmIdentifier + nCertHash + nIssuerSerial;
+ size_t nESSCertIDv2s = 1 + GetDERLengthOfLength(nESSCertIDv2) + nESSCertIDv2;
+
+ // Write SigningCertificateV2.
+ rEncodedCertificate.WriteUInt8(nASN1_SEQUENCE | nASN1_CONSTRUCTED);
+ WriteDERLength(rEncodedCertificate, nESSCertIDv2s);
+ // Write SEQUENCE OF ESSCertIDv2.
+ rEncodedCertificate.WriteUInt8(nASN1_SEQUENCE | nASN1_CONSTRUCTED);
+ WriteDERLength(rEncodedCertificate, nESSCertIDv2);
+ // Write ESSCertIDv2.
+ rEncodedCertificate.WriteUInt8(nASN1_SEQUENCE | nASN1_CONSTRUCTED);
+ WriteDERLength(rEncodedCertificate, nAlgorithmIdentifier + nCertHash + nIssuerSerial);
+ // Write AlgorithmIdentifier.
+ rEncodedCertificate.WriteUInt8(nASN1_SEQUENCE | nASN1_CONSTRUCTED);
+ WriteDERLength(rEncodedCertificate, nAlgorithm + nParameters);
+ // Write algorithm.
+ rEncodedCertificate.WriteUInt8(nASN1_OBJECT_IDENTIFIER);
+ WriteDERLength(rEncodedCertificate, aSHA256.size());
+ rEncodedCertificate.WriteBytes(aSHA256.data(), aSHA256.size());
+ // Write parameters.
+ rEncodedCertificate.WriteUInt8(nASN1_NULL);
+ rEncodedCertificate.WriteUInt8(0);
+ // Write certHash.
+ rEncodedCertificate.WriteUInt8(nASN1_OCTET_STRING);
+ WriteDERLength(rEncodedCertificate, aHash.size());
+ rEncodedCertificate.WriteBytes(aHash.data(), aHash.size());
+ // Write IssuerSerial.
+ rEncodedCertificate.WriteUInt8(nASN1_SEQUENCE | nASN1_CONSTRUCTED);
+ WriteDERLength(rEncodedCertificate, nGeneralNames + nCertificateSerialNumber);
+ // Write GeneralNames.
+ rEncodedCertificate.WriteUInt8(nASN1_SEQUENCE | nASN1_CONSTRUCTED);
+ WriteDERLength(rEncodedCertificate, nName);
+ // Write Name.
+ rEncodedCertificate.WriteUInt8(nASN1_TAGGED_CONSTRUCTED | 4);
+ WriteDERLength(rEncodedCertificate, nIssuer);
+ rEncodedCertificate.WriteBytes(pIssuer, nIssuer);
+ // Write CertificateSerialNumber.
+ rEncodedCertificate.WriteUInt8(nASN1_INTEGER);
+ WriteDERLength(rEncodedCertificate, nSerial);
+ rEncodedCertificate.WriteBytes(aSerial.data(), aSerial.size());
+
+ return true;
+}
+#endif // USE_CRYPTO_MSCAPI
+
+} // anonymous namespace
+
+namespace svl::crypto {
+
+static int AsHex(char ch)
+{
+ int nRet = 0;
+ if (rtl::isAsciiDigit(static_cast<unsigned char>(ch)))
+ nRet = ch - '0';
+ else
+ {
+ if (ch >= 'a' && ch <= 'f')
+ nRet = ch - 'a';
+ else if (ch >= 'A' && ch <= 'F')
+ nRet = ch - 'A';
+ else
+ return -1;
+ nRet += 10;
+ }
+ return nRet;
+}
+
+std::vector<unsigned char> DecodeHexString(std::string_view rHex)
+{
+ std::vector<unsigned char> aRet;
+ size_t nHexLen = rHex.size();
+ {
+ int nByte = 0;
+ int nCount = 2;
+ for (size_t i = 0; i < nHexLen; ++i)
+ {
+ nByte = nByte << 4;
+ sal_Int8 nParsed = AsHex(rHex[i]);
+ if (nParsed == -1)
+ {
+ SAL_WARN("svl.crypto", "DecodeHexString: invalid hex value");
+ return aRet;
+ }
+ nByte += nParsed;
+ --nCount;
+ if (!nCount)
+ {
+ aRet.push_back(nByte);
+ nCount = 2;
+ nByte = 0;
+ }
+ }
+ }
+
+ return aRet;
+}
+
+bool Signing::Sign(OStringBuffer& rCMSHexBuffer)
+{
+#if !USE_CRYPTO_ANY
+ (void)rCMSHexBuffer;
+ return false;
+#else
+ // Create the PKCS#7 object.
+ css::uno::Sequence<sal_Int8> aDerEncoded = m_xCertificate->getEncoded();
+ if (!aDerEncoded.hasElements())
+ {
+ SAL_WARN("svl.crypto", "Crypto::Signing: empty certificate");
+ return false;
+ }
+
+#if USE_CRYPTO_NSS
+ CERTCertificate *cert = CERT_DecodeCertFromPackage(reinterpret_cast<char *>(aDerEncoded.getArray()), aDerEncoded.getLength());
+
+ if (!cert)
+ {
+ SAL_WARN("svl.crypto", "CERT_DecodeCertFromPackage failed");
+ return false;
+ }
+
+ std::vector<unsigned char> aHashResult;
+ {
+ comphelper::Hash aHash(comphelper::HashType::SHA256);
+
+ for (const auto& pair : m_dataBlocks)
+ aHash.update(static_cast<const unsigned char*>(pair.first), pair.second);
+
+ aHashResult = aHash.finalize();
+ }
+ SECItem digest;
+ digest.data = aHashResult.data();
+ digest.len = aHashResult.size();
+
+ PRTime now = PR_Now();
+ NSSCMSSignedData *cms_sd(nullptr);
+ NSSCMSSignerInfo *cms_signer(nullptr);
+ NSSCMSMessage *cms_msg = CreateCMSMessage(nullptr, &cms_sd, &cms_signer, cert, &digest);
+ if (!cms_msg)
+ return false;
+
+ OString pass(OUStringToOString( m_aSignPassword, RTL_TEXTENCODING_UTF8 ));
+
+ TimeStampReq src;
+ OStringBuffer response_buffer;
+ TimeStampResp response;
+ SECItem response_item;
+ NSSCMSAttribute timestamp;
+ SECItem values[2];
+ SECItem *valuesp[2];
+ valuesp[0] = values;
+ valuesp[1] = nullptr;
+ SECOidData typetag;
+
+ if( !m_aSignTSA.isEmpty() )
+ {
+ // Create another CMS message with the same contents as cms_msg, because it doesn't seem
+ // possible to encode a message twice (once to get something to timestamp, and then after
+ // adding the timestamp attribute).
+
+ NSSCMSSignedData *ts_cms_sd;
+ NSSCMSSignerInfo *ts_cms_signer;
+ NSSCMSMessage *ts_cms_msg = CreateCMSMessage(&now, &ts_cms_sd, &ts_cms_signer, cert, &digest);
+ if (!ts_cms_msg)
+ {
+ return false;
+ }
+
+ SECItem ts_cms_output;
+ ts_cms_output.data = nullptr;
+ ts_cms_output.len = 0;
+ PLArenaPool *ts_arena = PORT_NewArena(10000);
+ NSSCMSEncoderContext *ts_cms_ecx;
+ ts_cms_ecx = NSS_CMSEncoder_Start(ts_cms_msg, nullptr, nullptr, &ts_cms_output, ts_arena, PDFSigningPKCS7PasswordCallback,
+ const_cast<char*>(pass.getStr()), nullptr, nullptr, nullptr, nullptr);
+
+ if (NSS_CMSEncoder_Finish(ts_cms_ecx) != SECSuccess)
+ {
+ SAL_WARN("svl.crypto", "NSS_CMSEncoder_Finish failed");
+ return false;
+ }
+
+ // I have compared the ts_cms_output produced here with the cms_output produced below when
+ // not actually calling my_NSS_CMSSignerInfo_AddUnauthAttr()), and they are identical.
+
+ std::vector<unsigned char> aTsHashResult = comphelper::Hash::calculateHash(ts_cms_signer->encDigest.data, ts_cms_signer->encDigest.len, comphelper::HashType::SHA256);
+ SECItem ts_digest;
+ ts_digest.type = siBuffer;
+ ts_digest.data = aTsHashResult.data();
+ ts_digest.len = aTsHashResult.size();
+
+ unsigned char cOne = 1;
+ src.version.type = siUnsignedInteger;
+ src.version.data = &cOne;
+ src.version.len = sizeof(cOne);
+
+ src.messageImprint.hashAlgorithm.algorithm.data = nullptr;
+ src.messageImprint.hashAlgorithm.parameters.data = nullptr;
+ SECOID_SetAlgorithmID(nullptr, &src.messageImprint.hashAlgorithm, SEC_OID_SHA256, nullptr);
+ src.messageImprint.hashedMessage = ts_digest;
+
+ src.reqPolicy.type = siBuffer;
+ src.reqPolicy.data = nullptr;
+ src.reqPolicy.len = 0;
+
+ unsigned int nNonce = comphelper::rng::uniform_uint_distribution(0, SAL_MAX_UINT32);
+ src.nonce.type = siUnsignedInteger;
+ src.nonce.data = reinterpret_cast<unsigned char*>(&nNonce);
+ src.nonce.len = sizeof(nNonce);
+
+ src.certReq.type = siUnsignedInteger;
+ src.certReq.data = &cOne;
+ src.certReq.len = sizeof(cOne);
+
+ src.extensions = nullptr;
+
+ SECItem* timestamp_request = SEC_ASN1EncodeItem(nullptr, nullptr, &src, TimeStampReq_Template);
+ if (timestamp_request == nullptr)
+ {
+ SAL_WARN("svl.crypto", "SEC_ASN1EncodeItem failed");
+ return false;
+ }
+
+ if (timestamp_request->data == nullptr)
+ {
+ SAL_WARN("svl.crypto", "SEC_ASN1EncodeItem succeeded but got NULL data");
+ SECITEM_FreeItem(timestamp_request, PR_TRUE);
+ return false;
+ }
+
+ SAL_INFO("svl.crypto", "request length=" << timestamp_request->len);
+
+ // Send time stamp request to TSA server, receive response
+
+ CURL* curl = curl_easy_init();
+ CURLcode rc;
+ struct curl_slist* slist = nullptr;
+
+ if (!curl)
+ {
+ SAL_WARN("svl.crypto", "curl_easy_init failed");
+ SECITEM_FreeItem(timestamp_request, PR_TRUE);
+ return false;
+ }
+
+ SAL_INFO("svl.crypto", "Setting curl to verbose: " << (curl_easy_setopt(curl, CURLOPT_VERBOSE, 1) == CURLE_OK ? "OK" : "FAIL"));
+
+ if ((rc = curl_easy_setopt(curl, CURLOPT_URL, OUStringToOString(m_aSignTSA, RTL_TEXTENCODING_UTF8).getStr())) != CURLE_OK)
+ {
+ SAL_WARN("svl.crypto", "curl_easy_setopt(CURLOPT_URL) failed: " << curl_easy_strerror(rc));
+ curl_easy_cleanup(curl);
+ SECITEM_FreeItem(timestamp_request, PR_TRUE);
+ return false;
+ }
+
+ slist = curl_slist_append(slist, "Content-Type: application/timestamp-query");
+ slist = curl_slist_append(slist, "Accept: application/timestamp-reply");
+
+ if ((rc = curl_easy_setopt(curl, CURLOPT_HTTPHEADER, slist)) != CURLE_OK)
+ {
+ SAL_WARN("svl.crypto", "curl_easy_setopt(CURLOPT_HTTPHEADER) failed: " << curl_easy_strerror(rc));
+ curl_slist_free_all(slist);
+ curl_easy_cleanup(curl);
+ SECITEM_FreeItem(timestamp_request, PR_TRUE);
+ return false;
+ }
+
+ if ((rc = curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, static_cast<tools::Long>(timestamp_request->len))) != CURLE_OK ||
+ (rc = curl_easy_setopt(curl, CURLOPT_POSTFIELDS, timestamp_request->data)) != CURLE_OK)
+ {
+ SAL_WARN("svl.crypto", "curl_easy_setopt(CURLOPT_POSTFIELDSIZE or CURLOPT_POSTFIELDS) failed: " << curl_easy_strerror(rc));
+ curl_easy_cleanup(curl);
+ SECITEM_FreeItem(timestamp_request, PR_TRUE);
+ return false;
+ }
+
+ if ((rc = curl_easy_setopt(curl, CURLOPT_WRITEDATA, &response_buffer)) != CURLE_OK ||
+ (rc = curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, AppendToBuffer)) != CURLE_OK)
+ {
+ SAL_WARN("svl.crypto", "curl_easy_setopt(CURLOPT_WRITEDATA or CURLOPT_WRITEFUNCTION) failed: " << curl_easy_strerror(rc));
+ curl_easy_cleanup(curl);
+ SECITEM_FreeItem(timestamp_request, PR_TRUE);
+ return false;
+ }
+
+ if ((rc = curl_easy_setopt(curl, CURLOPT_POST, 1)) != CURLE_OK)
+ {
+ SAL_WARN("svl.crypto", "curl_easy_setopt(CURLOPT_POST) failed: " << curl_easy_strerror(rc));
+ curl_easy_cleanup(curl);
+ SECITEM_FreeItem(timestamp_request, PR_TRUE);
+ return false;
+ }
+
+ char error_buffer[CURL_ERROR_SIZE];
+ if ((rc = curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, error_buffer)) != CURLE_OK)
+ {
+ SAL_WARN("svl.crypto", "curl_easy_setopt(CURLOPT_ERRORBUFFER) failed: " << curl_easy_strerror(rc));
+ curl_easy_cleanup(curl);
+ SECITEM_FreeItem(timestamp_request, PR_TRUE);
+ return false;
+ }
+
+ // Use a ten second timeout
+ if ((rc = curl_easy_setopt(curl, CURLOPT_TIMEOUT, 10)) != CURLE_OK ||
+ (rc = curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 10)) != CURLE_OK)
+ {
+ SAL_WARN("svl.crypto", "curl_easy_setopt(CURLOPT_TIMEOUT or CURLOPT_CONNECTTIMEOUT) failed: " << curl_easy_strerror(rc));
+ curl_easy_cleanup(curl);
+ SECITEM_FreeItem(timestamp_request, PR_TRUE);
+ return false;
+ }
+
+ if (curl_easy_perform(curl) != CURLE_OK)
+ {
+ SAL_WARN("svl.crypto", "curl_easy_perform failed: " << error_buffer);
+ curl_easy_cleanup(curl);
+ SECITEM_FreeItem(timestamp_request, PR_TRUE);
+ return false;
+ }
+
+ SAL_INFO("svl.crypto", "PDF signing: got response, length=" << response_buffer.getLength());
+
+ curl_slist_free_all(slist);
+ curl_easy_cleanup(curl);
+ SECITEM_FreeItem(timestamp_request, PR_TRUE);
+
+ memset(&response, 0, sizeof(response));
+
+ response_item.type = siBuffer;
+ response_item.data = reinterpret_cast<unsigned char*>(const_cast<char*>(response_buffer.getStr()));
+ response_item.len = response_buffer.getLength();
+
+ if (SEC_ASN1DecodeItem(nullptr, &response, TimeStampResp_Template, &response_item) != SECSuccess)
+ {
+ SAL_WARN("svl.crypto", "SEC_ASN1DecodeItem failed");
+ return false;
+ }
+
+ SAL_INFO("svl.crypto", "TimeStampResp received and decoded, status=" << PKIStatusInfoToString(response.status));
+
+ if (response.status.status.len != 1 ||
+ (response.status.status.data[0] != 0 && response.status.status.data[0] != 1))
+ {
+ SAL_WARN("svl.crypto", "Timestamp request was not granted");
+ return false;
+ }
+
+ // timestamp.type filled in below
+
+ // Not sure if we actually need two entries in the values array, now when valuesp is an
+ // array too, the pointer to the values array followed by a null pointer. But I don't feel
+ // like experimenting.
+ values[0] = response.timeStampToken;
+ values[1].type = siBuffer;
+ values[1].data = nullptr;
+ values[1].len = 0;
+
+ timestamp.values = valuesp;
+
+ typetag.oid.data = nullptr;
+ // id-aa-timeStampToken OBJECT IDENTIFIER ::= { iso(1)
+ // member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9)
+ // smime(16) aa(2) 14 }
+ if (my_SEC_StringToOID(&typetag.oid, "1.2.840.113549.1.9.16.2.14", 0) != SECSuccess)
+ {
+ SAL_WARN("svl.crypto", "SEC_StringToOID failed");
+ return false;
+ }
+ typetag.offset = SEC_OID_UNKNOWN; // ???
+ typetag.desc = "id-aa-timeStampToken";
+ typetag.mechanism = CKM_SHA_1; // ???
+ typetag.supportedExtension = UNSUPPORTED_CERT_EXTENSION; // ???
+ timestamp.typeTag = &typetag;
+
+ timestamp.type = typetag.oid; // ???
+
+ timestamp.encoded = PR_TRUE; // ???
+
+ if (my_NSS_CMSSignerInfo_AddUnauthAttr(cms_signer, &timestamp) != SECSuccess)
+ {
+ SAL_WARN("svl.crypto", "NSS_CMSSignerInfo_AddUnauthAttr failed");
+ return false;
+ }
+ }
+
+ // Add the signing certificate as a signed attribute.
+ ESSCertIDv2* aCertIDs[2];
+ ESSCertIDv2 aCertID;
+ // Write ESSCertIDv2.hashAlgorithm.
+ aCertID.hashAlgorithm.algorithm.data = nullptr;
+ aCertID.hashAlgorithm.parameters.data = nullptr;
+ SECOID_SetAlgorithmID(nullptr, &aCertID.hashAlgorithm, SEC_OID_SHA256, nullptr);
+ comphelper::ScopeGuard aAlgoGuard(
+ [&aCertID] () { SECOID_DestroyAlgorithmID(&aCertID.hashAlgorithm, false); } );
+ // Write ESSCertIDv2.certHash.
+ SECItem aCertHashItem;
+ auto pDerEncoded = reinterpret_cast<const unsigned char *>(aDerEncoded.getArray());
+ std::vector<unsigned char> aCertHashResult = comphelper::Hash::calculateHash(pDerEncoded, aDerEncoded.getLength(), comphelper::HashType::SHA256);
+ aCertHashItem.type = siBuffer;
+ aCertHashItem.data = aCertHashResult.data();
+ aCertHashItem.len = aCertHashResult.size();
+ aCertID.certHash = aCertHashItem;
+ // Write ESSCertIDv2.issuerSerial.
+ IssuerSerial aSerial;
+ GeneralName aName;
+ aName.name = cert->issuer;
+ aSerial.issuer.names = aName;
+ aSerial.serialNumber = cert->serialNumber;
+ aCertID.issuerSerial = aSerial;
+ // Write SigningCertificateV2.certs.
+ aCertIDs[0] = &aCertID;
+ aCertIDs[1] = nullptr;
+ SigningCertificateV2 aCertificate;
+ aCertificate.certs = &aCertIDs[0];
+ SECItem* pEncodedCertificate = SEC_ASN1EncodeItem(nullptr, nullptr, &aCertificate, SigningCertificateV2Template);
+ if (!pEncodedCertificate)
+ {
+ SAL_WARN("svl.crypto", "SEC_ASN1EncodeItem() failed");
+ return false;
+ }
+
+ NSSCMSAttribute aAttribute;
+ SECItem aAttributeValues[2];
+ SECItem* pAttributeValues[2];
+ pAttributeValues[0] = aAttributeValues;
+ pAttributeValues[1] = nullptr;
+ aAttributeValues[0] = *pEncodedCertificate;
+ aAttributeValues[1].type = siBuffer;
+ aAttributeValues[1].data = nullptr;
+ aAttributeValues[1].len = 0;
+ aAttribute.values = pAttributeValues;
+
+ SECOidData aOidData;
+ aOidData.oid.data = nullptr;
+ /*
+ * id-aa-signingCertificateV2 OBJECT IDENTIFIER ::=
+ * { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs9(9)
+ * smime(16) id-aa(2) 47 }
+ */
+ if (my_SEC_StringToOID(&aOidData.oid, "1.2.840.113549.1.9.16.2.47", 0) != SECSuccess)
+ {
+ SAL_WARN("svl.crypto", "my_SEC_StringToOID() failed");
+ return false;
+ }
+ comphelper::ScopeGuard aGuard(
+ [&aOidData] () { SECITEM_FreeItem(&aOidData.oid, false); } );
+ aOidData.offset = SEC_OID_UNKNOWN;
+ aOidData.desc = "id-aa-signingCertificateV2";
+ aOidData.mechanism = CKM_SHA_1;
+ aOidData.supportedExtension = UNSUPPORTED_CERT_EXTENSION;
+ aAttribute.typeTag = &aOidData;
+ aAttribute.type = aOidData.oid;
+ aAttribute.encoded = PR_TRUE;
+
+ if (my_NSS_CMSSignerInfo_AddAuthAttr(cms_signer, &aAttribute) != SECSuccess)
+ {
+ SAL_WARN("svl.crypto", "my_NSS_CMSSignerInfo_AddAuthAttr() failed");
+ return false;
+ }
+
+ SECItem cms_output;
+ cms_output.data = nullptr;
+ cms_output.len = 0;
+ PLArenaPool *arena = PORT_NewArena(10000);
+ const ::comphelper::ScopeGuard aScopeGuard(
+ [&arena]() mutable { PORT_FreeArena(arena, true); } );
+ NSSCMSEncoderContext *cms_ecx;
+
+ // Possibly it would work to even just pass NULL for the password callback function and its
+ // argument here. After all, at least with the hardware token and associated software I tested
+ // with, the software itself pops up a dialog asking for the PIN (password). But I am not going
+ // to test it and risk locking up my token...
+
+ cms_ecx = NSS_CMSEncoder_Start(cms_msg, nullptr, nullptr, &cms_output, arena, PDFSigningPKCS7PasswordCallback,
+ const_cast<char*>(pass.getStr()), nullptr, nullptr, nullptr, nullptr);
+
+ if (!cms_ecx)
+ {
+ SAL_WARN("svl.crypto", "NSS_CMSEncoder_Start failed");
+ return false;
+ }
+
+ if (NSS_CMSEncoder_Finish(cms_ecx) != SECSuccess)
+ {
+ SAL_WARN("svl.crypto", "NSS_CMSEncoder_Finish failed");
+ return false;
+ }
+
+ if (cms_output.len*2 > MAX_SIGNATURE_CONTENT_LENGTH)
+ {
+ SAL_WARN("svl.crypto", "Signature requires more space (" << cms_output.len*2 << ") than we reserved (" << MAX_SIGNATURE_CONTENT_LENGTH << ")");
+ NSS_CMSMessage_Destroy(cms_msg);
+ return false;
+ }
+
+ for (unsigned int i = 0; i < cms_output.len ; i++)
+ appendHex(cms_output.data[i], rCMSHexBuffer);
+
+ SECITEM_FreeItem(pEncodedCertificate, PR_TRUE);
+ NSS_CMSMessage_Destroy(cms_msg);
+
+ return true;
+
+#elif USE_CRYPTO_MSCAPI // ends USE_CRYPTO_NSS
+
+ PCCERT_CONTEXT pCertContext = CertCreateCertificateContext(X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, reinterpret_cast<const BYTE*>(aDerEncoded.getArray()), aDerEncoded.getLength());
+ if (pCertContext == nullptr)
+ {
+ SAL_WARN("svl.crypto", "CertCreateCertificateContext failed: " << WindowsErrorString(GetLastError()));
+ return false;
+ }
+
+ CRYPT_SIGN_MESSAGE_PARA aPara = {};
+ aPara.cbSize = sizeof(aPara);
+ aPara.dwMsgEncodingType = PKCS_7_ASN_ENCODING | X509_ASN_ENCODING;
+ aPara.pSigningCert = pCertContext;
+ aPara.HashAlgorithm.pszObjId = const_cast<LPSTR>(szOID_NIST_sha256);
+ aPara.HashAlgorithm.Parameters.cbData = 0;
+ aPara.cMsgCert = 1;
+ aPara.rgpMsgCert = &pCertContext;
+
+ NCRYPT_KEY_HANDLE hCryptKey = 0;
+ DWORD dwFlags = CRYPT_ACQUIRE_CACHE_FLAG | CRYPT_ACQUIRE_ONLY_NCRYPT_KEY_FLAG;
+ HCRYPTPROV_OR_NCRYPT_KEY_HANDLE* phCryptProvOrNCryptKey = &hCryptKey;
+ DWORD nKeySpec;
+ BOOL bFreeNeeded;
+
+ if (!CryptAcquireCertificatePrivateKey(pCertContext,
+ dwFlags,
+ nullptr,
+ phCryptProvOrNCryptKey,
+ &nKeySpec,
+ &bFreeNeeded))
+ {
+ SAL_WARN("svl.crypto", "CryptAcquireCertificatePrivateKey failed: " << WindowsErrorString(GetLastError()));
+ CertFreeCertificateContext(pCertContext);
+ return false;
+ }
+ assert(!bFreeNeeded);
+
+ CMSG_SIGNER_ENCODE_INFO aSignerInfo = {};
+ aSignerInfo.cbSize = sizeof(aSignerInfo);
+ aSignerInfo.pCertInfo = pCertContext->pCertInfo;
+ aSignerInfo.hNCryptKey = hCryptKey;
+ aSignerInfo.dwKeySpec = nKeySpec;
+ aSignerInfo.HashAlgorithm.pszObjId = const_cast<LPSTR>(szOID_NIST_sha256);
+ aSignerInfo.HashAlgorithm.Parameters.cbData = 0;
+
+ // Add the signing certificate as a signed attribute.
+ CRYPT_INTEGER_BLOB aCertificateBlob;
+ SvMemoryStream aEncodedCertificate;
+ if (!CreateSigningCertificateAttribute(aDerEncoded.getArray(), aDerEncoded.getLength(), pCertContext, aEncodedCertificate))
+ {
+ SAL_WARN("svl.crypto", "CreateSigningCertificateAttribute() failed");
+ return false;
+ }
+ aCertificateBlob.pbData = const_cast<BYTE*>(static_cast<const BYTE*>(aEncodedCertificate.GetData()));
+ aCertificateBlob.cbData = aEncodedCertificate.GetSize();
+ CRYPT_ATTRIBUTE aCertificateAttribute;
+ /*
+ * id-aa-signingCertificateV2 OBJECT IDENTIFIER ::=
+ * { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs9(9)
+ * smime(16) id-aa(2) 47 }
+ */
+ aCertificateAttribute.pszObjId = const_cast<LPSTR>("1.2.840.113549.1.9.16.2.47");
+ aCertificateAttribute.cValue = 1;
+ aCertificateAttribute.rgValue = &aCertificateBlob;
+ aSignerInfo.cAuthAttr = 1;
+ aSignerInfo.rgAuthAttr = &aCertificateAttribute;
+
+ CMSG_SIGNED_ENCODE_INFO aSignedInfo = {};
+ aSignedInfo.cbSize = sizeof(aSignedInfo);
+ aSignedInfo.cSigners = 1;
+ aSignedInfo.rgSigners = &aSignerInfo;
+
+ CERT_BLOB aCertBlob;
+
+ aCertBlob.cbData = pCertContext->cbCertEncoded;
+ aCertBlob.pbData = pCertContext->pbCertEncoded;
+
+ aSignedInfo.cCertEncoded = 1;
+ aSignedInfo.rgCertEncoded = &aCertBlob;
+
+ HCRYPTMSG hMsg = CryptMsgOpenToEncode(PKCS_7_ASN_ENCODING | X509_ASN_ENCODING,
+ CMSG_DETACHED_FLAG,
+ CMSG_SIGNED,
+ &aSignedInfo,
+ nullptr,
+ nullptr);
+ if (!hMsg)
+ {
+ SAL_WARN("svl.crypto", "CryptMsgOpenToEncode failed: " << WindowsErrorString(GetLastError()));
+ CertFreeCertificateContext(pCertContext);
+ return false;
+ }
+
+ for (size_t i = 0; i < m_dataBlocks.size(); ++i)
+ {
+ const bool last = (i == m_dataBlocks.size() - 1);
+ if (!CryptMsgUpdate(hMsg, static_cast<const BYTE *>(m_dataBlocks[i].first), m_dataBlocks[i].second, last))
+ {
+ SAL_WARN("svl.crypto", "CryptMsgUpdate failed: " << WindowsErrorString(GetLastError()));
+ CryptMsgClose(hMsg);
+ CertFreeCertificateContext(pCertContext);
+ return false;
+ }
+ }
+
+ PCRYPT_TIMESTAMP_CONTEXT pTsContext = nullptr;
+
+ if( !m_aSignTSA.isEmpty() )
+ {
+ HCRYPTMSG hDecodedMsg = CryptMsgOpenToDecode(PKCS_7_ASN_ENCODING | X509_ASN_ENCODING,
+ CMSG_DETACHED_FLAG,
+ CMSG_SIGNED,
+ 0,
+ nullptr,
+ nullptr);
+ if (!hDecodedMsg)
+ {
+ SAL_WARN("svl.crypto", "CryptMsgOpenToDecode failed: " << WindowsErrorString(GetLastError()));
+ CryptMsgClose(hMsg);
+ CertFreeCertificateContext(pCertContext);
+ return false;
+ }
+
+ DWORD nTsSigLen = 0;
+
+ if (!CryptMsgGetParam(hMsg, CMSG_BARE_CONTENT_PARAM, 0, nullptr, &nTsSigLen))
+ {
+ SAL_WARN("svl.crypto", "CryptMsgGetParam(CMSG_BARE_CONTENT_PARAM) failed: " << WindowsErrorString(GetLastError()));
+ CryptMsgClose(hDecodedMsg);
+ CryptMsgClose(hMsg);
+ CertFreeCertificateContext(pCertContext);
+ return false;
+ }
+
+ SAL_INFO("svl.crypto", "nTsSigLen=" << nTsSigLen);
+
+ std::unique_ptr<BYTE[]> pTsSig(new BYTE[nTsSigLen]);
+
+ if (!CryptMsgGetParam(hMsg, CMSG_BARE_CONTENT_PARAM, 0, pTsSig.get(), &nTsSigLen))
+ {
+ SAL_WARN("svl.crypto", "CryptMsgGetParam(CMSG_BARE_CONTENT_PARAM) failed: " << WindowsErrorString(GetLastError()));
+ CryptMsgClose(hDecodedMsg);
+ CryptMsgClose(hMsg);
+ CertFreeCertificateContext(pCertContext);
+ return false;
+ }
+
+ if (!CryptMsgUpdate(hDecodedMsg, pTsSig.get(), nTsSigLen, TRUE))
+ {
+ SAL_WARN("svl.crypto", "CryptMsgUpdate failed: " << WindowsErrorString(GetLastError()));
+ CryptMsgClose(hDecodedMsg);
+ CryptMsgClose(hMsg);
+ CertFreeCertificateContext(pCertContext);
+ return false;
+ }
+
+ DWORD nDecodedSignerInfoLen = 0;
+ if (!CryptMsgGetParam(hDecodedMsg, CMSG_SIGNER_INFO_PARAM, 0, nullptr, &nDecodedSignerInfoLen))
+ {
+ SAL_WARN("svl.crypto", "CryptMsgGetParam(CMSG_SIGNER_INFO_PARAM) failed: " << WindowsErrorString(GetLastError()));
+ CryptMsgClose(hDecodedMsg);
+ CryptMsgClose(hMsg);
+ CertFreeCertificateContext(pCertContext);
+ return false;
+ }
+
+ std::unique_ptr<BYTE[]> pDecodedSignerInfoBuf(new BYTE[nDecodedSignerInfoLen]);
+
+ if (!CryptMsgGetParam(hDecodedMsg, CMSG_SIGNER_INFO_PARAM, 0, pDecodedSignerInfoBuf.get(), &nDecodedSignerInfoLen))
+ {
+ SAL_WARN("svl.crypto", "CryptMsgGetParam(CMSG_SIGNER_INFO_PARAM) failed: " << WindowsErrorString(GetLastError()));
+ CryptMsgClose(hDecodedMsg);
+ CryptMsgClose(hMsg);
+ CertFreeCertificateContext(pCertContext);
+ return false;
+ }
+
+ CMSG_SIGNER_INFO *pDecodedSignerInfo = reinterpret_cast<CMSG_SIGNER_INFO *>(pDecodedSignerInfoBuf.get());
+
+ CRYPT_TIMESTAMP_PARA aTsPara;
+ unsigned int nNonce = comphelper::rng::uniform_uint_distribution(0, SAL_MAX_UINT32);
+
+ aTsPara.pszTSAPolicyId = nullptr;
+ aTsPara.fRequestCerts = TRUE;
+ aTsPara.Nonce.cbData = sizeof(nNonce);
+ aTsPara.Nonce.pbData = reinterpret_cast<BYTE *>(&nNonce);
+ aTsPara.cExtension = 0;
+ aTsPara.rgExtension = nullptr;
+
+ if (!CryptRetrieveTimeStamp(o3tl::toW(m_aSignTSA.getStr()),
+ 0,
+ 10000,
+ szOID_NIST_sha256,
+ &aTsPara,
+ pDecodedSignerInfo->EncryptedHash.pbData,
+ pDecodedSignerInfo->EncryptedHash.cbData,
+ &pTsContext,
+ nullptr,
+ nullptr))
+ {
+ SAL_WARN("svl.crypto", "CryptRetrieveTimeStamp failed: " << WindowsErrorString(GetLastError()));
+ CryptMsgClose(hDecodedMsg);
+ CryptMsgClose(hMsg);
+ CertFreeCertificateContext(pCertContext);
+ return false;
+ }
+
+ SAL_INFO("svl.crypto", "Time stamp size is " << pTsContext->cbEncoded << " bytes");
+
+ // I tried to use CryptMsgControl() with CMSG_CTRL_ADD_SIGNER_UNAUTH_ATTR to add the
+ // timestamp, but that failed with "The parameter is incorrect". Probably it is too late to
+ // modify the message once its data has already been encoded as part of the
+ // CryptMsgGetParam() with CMSG_BARE_CONTENT_PARAM above. So close the message and re-do its
+ // creation steps, but now with an amended aSignerInfo.
+
+ CRYPT_INTEGER_BLOB aTimestampBlob;
+ aTimestampBlob.cbData = pTsContext->cbEncoded;
+ aTimestampBlob.pbData = pTsContext->pbEncoded;
+
+ CRYPT_ATTRIBUTE aTimestampAttribute;
+ aTimestampAttribute.pszObjId = const_cast<LPSTR>(
+ "1.2.840.113549.1.9.16.2.14");
+ aTimestampAttribute.cValue = 1;
+ aTimestampAttribute.rgValue = &aTimestampBlob;
+
+ aSignerInfo.cUnauthAttr = 1;
+ aSignerInfo.rgUnauthAttr = &aTimestampAttribute;
+
+ CryptMsgClose(hMsg);
+
+ hMsg = CryptMsgOpenToEncode(PKCS_7_ASN_ENCODING | X509_ASN_ENCODING,
+ CMSG_DETACHED_FLAG,
+ CMSG_SIGNED,
+ &aSignedInfo,
+ nullptr,
+ nullptr);
+
+ for (size_t i = 0; i < m_dataBlocks.size(); ++i)
+ {
+ const bool last = (i == m_dataBlocks.size() - 1);
+ if (!hMsg ||
+ !CryptMsgUpdate(hMsg, static_cast<const BYTE *>(m_dataBlocks[i].first), m_dataBlocks[i].second, last))
+ {
+ SAL_WARN("svl.crypto", "Re-creating the message failed: " << WindowsErrorString(GetLastError()));
+ CryptMemFree(pTsContext);
+ CryptMsgClose(hDecodedMsg);
+ CryptMsgClose(hMsg);
+ CertFreeCertificateContext(pCertContext);
+ return false;
+ }
+ }
+
+ CryptMsgClose(hDecodedMsg);
+ }
+
+ DWORD nSigLen = 0;
+
+ if (!CryptMsgGetParam(hMsg, CMSG_CONTENT_PARAM, 0, nullptr, &nSigLen))
+ {
+ SAL_WARN("svl.crypto", "CryptMsgGetParam(CMSG_CONTENT_PARAM) failed: " << WindowsErrorString(GetLastError()));
+ if (pTsContext)
+ CryptMemFree(pTsContext);
+ CryptMsgClose(hMsg);
+ CertFreeCertificateContext(pCertContext);
+ return false;
+ }
+
+ if (nSigLen*2 > MAX_SIGNATURE_CONTENT_LENGTH)
+ {
+ SAL_WARN("svl.crypto", "Signature requires more space (" << nSigLen*2 << ") than we reserved (" << MAX_SIGNATURE_CONTENT_LENGTH << ")");
+ if (pTsContext)
+ CryptMemFree(pTsContext);
+ CryptMsgClose(hMsg);
+ CertFreeCertificateContext(pCertContext);
+ return false;
+ }
+
+ SAL_INFO("svl.crypto", "Signature size is " << nSigLen << " bytes");
+ std::unique_ptr<BYTE[]> pSig(new BYTE[nSigLen]);
+
+ if (!CryptMsgGetParam(hMsg, CMSG_CONTENT_PARAM, 0, pSig.get(), &nSigLen))
+ {
+ SAL_WARN("svl.crypto", "CryptMsgGetParam(CMSG_CONTENT_PARAM) failed: " << WindowsErrorString(GetLastError()));
+ if (pTsContext)
+ CryptMemFree(pTsContext);
+ CryptMsgClose(hMsg);
+ CertFreeCertificateContext(pCertContext);
+ return false;
+ }
+
+ // Release resources
+ if (pTsContext)
+ CryptMemFree(pTsContext);
+ CryptMsgClose(hMsg);
+ CertFreeCertificateContext(pCertContext);
+
+ for (unsigned int i = 0; i < nSigLen ; i++)
+ appendHex(pSig[i], rCMSHexBuffer);
+
+ return true;
+#endif // USE_CRYPTO_MSCAPI
+#endif // USE_CRYPTO_ANY
+}
+
+namespace
+{
+#if USE_CRYPTO_NSS
+/// Similar to NSS_CMSAttributeArray_FindAttrByOidTag(), but works directly with a SECOidData.
+NSSCMSAttribute* CMSAttributeArray_FindAttrByOidData(NSSCMSAttribute** attrs, SECOidData const * oid, PRBool only)
+{
+ NSSCMSAttribute* attr1, *attr2;
+
+ if (attrs == nullptr)
+ return nullptr;
+
+ if (oid == nullptr)
+ return nullptr;
+
+ while ((attr1 = *attrs++) != nullptr)
+ {
+ if (attr1->type.len == oid->oid.len && PORT_Memcmp(attr1->type.data,
+ oid->oid.data,
+ oid->oid.len) == 0)
+ break;
+ }
+
+ if (attr1 == nullptr)
+ return nullptr;
+
+ if (!only)
+ return attr1;
+
+ while ((attr2 = *attrs++) != nullptr)
+ {
+ if (attr2->type.len == oid->oid.len && PORT_Memcmp(attr2->type.data,
+ oid->oid.data,
+ oid->oid.len) == 0)
+ break;
+ }
+
+ if (attr2 != nullptr)
+ return nullptr;
+
+ return attr1;
+}
+
+/// Same as SEC_StringToOID(), which is private to us.
+SECStatus StringToOID(SECItem* to, const char* from, PRUint32 len)
+{
+ PRUint32 decimal_numbers = 0;
+ PRUint32 result_bytes = 0;
+ SECStatus rv;
+ PRUint8 result[1024];
+
+ static const PRUint32 max_decimal = 0xffffffff / 10;
+ static const char OIDstring[] = {"OID."};
+
+ if (!from || !to)
+ {
+ PORT_SetError(SEC_ERROR_INVALID_ARGS);
+ return SECFailure;
+ }
+ if (!len)
+ {
+ len = PL_strlen(from);
+ }
+ if (len >= 4 && !PL_strncasecmp(from, OIDstring, 4))
+ {
+ from += 4; /* skip leading "OID." if present */
+ len -= 4;
+ }
+ if (!len)
+ {
+bad_data:
+ PORT_SetError(SEC_ERROR_BAD_DATA);
+ return SECFailure;
+ }
+ do
+ {
+ PRUint32 decimal = 0;
+ while (len > 0 && rtl::isAsciiDigit(static_cast<unsigned char>(*from)))
+ {
+ PRUint32 addend = *from++ - '0';
+ --len;
+ if (decimal > max_decimal) /* overflow */
+ goto bad_data;
+ decimal = (decimal * 10) + addend;
+ if (decimal < addend) /* overflow */
+ goto bad_data;
+ }
+ if (len != 0 && *from != '.')
+ {
+ goto bad_data;
+ }
+ if (decimal_numbers == 0)
+ {
+ if (decimal > 2)
+ goto bad_data;
+ result[0] = decimal * 40;
+ result_bytes = 1;
+ }
+ else if (decimal_numbers == 1)
+ {
+ if (decimal > 40)
+ goto bad_data;
+ result[0] += decimal;
+ }
+ else
+ {
+ /* encode the decimal number, */
+ PRUint8* rp;
+ PRUint32 num_bytes = 0;
+ PRUint32 tmp = decimal;
+ while (tmp)
+ {
+ num_bytes++;
+ tmp >>= 7;
+ }
+ if (!num_bytes)
+ ++num_bytes; /* use one byte for a zero value */
+ if (static_cast<size_t>(num_bytes) + result_bytes > sizeof result)
+ goto bad_data;
+ tmp = num_bytes;
+ rp = result + result_bytes - 1;
+ rp[tmp] = static_cast<PRUint8>(decimal & 0x7f);
+ decimal >>= 7;
+ while (--tmp > 0)
+ {
+ rp[tmp] = static_cast<PRUint8>(decimal | 0x80);
+ decimal >>= 7;
+ }
+ result_bytes += num_bytes;
+ }
+ ++decimal_numbers;
+ if (len > 0) /* skip trailing '.' */
+ {
+ ++from;
+ --len;
+ }
+ }
+ while (len > 0);
+ /* now result contains result_bytes of data */
+ if (to->data && to->len >= result_bytes)
+ {
+ to->len = result_bytes;
+ PORT_Memcpy(to->data, result, to->len);
+ rv = SECSuccess;
+ }
+ else
+ {
+ SECItem result_item = {siBuffer, nullptr, 0 };
+ result_item.data = result;
+ result_item.len = result_bytes;
+ rv = SECITEM_CopyItem(nullptr, to, &result_item);
+ }
+ return rv;
+}
+
+#elif USE_CRYPTO_MSCAPI // ends USE_CRYPTO_NSS
+
+/// Verifies a non-detached signature using CryptoAPI.
+bool VerifyNonDetachedSignature(const std::vector<unsigned char>& aData, const std::vector<BYTE>& rExpectedHash)
+{
+ HCRYPTPROV hProv = 0;
+ if (!CryptAcquireContextW(&hProv, nullptr, nullptr, PROV_RSA_AES, CRYPT_VERIFYCONTEXT))
+ {
+ SAL_WARN("svl.crypto", "CryptAcquireContext() failed");
+ return false;
+ }
+
+ HCRYPTHASH hHash = 0;
+ if (!CryptCreateHash(hProv, CALG_SHA1, 0, 0, &hHash))
+ {
+ SAL_WARN("svl.crypto", "CryptCreateHash() failed");
+ return false;
+ }
+
+ if (!CryptHashData(hHash, aData.data(), aData.size(), 0))
+ {
+ SAL_WARN("svl.crypto", "CryptHashData() failed");
+ return false;
+ }
+
+ DWORD nActualHash = 0;
+ if (!CryptGetHashParam(hHash, HP_HASHVAL, nullptr, &nActualHash, 0))
+ {
+ SAL_WARN("svl.crypto", "CryptGetHashParam() failed to provide the hash length");
+ return false;
+ }
+
+ std::vector<unsigned char> aActualHash(nActualHash);
+ if (!CryptGetHashParam(hHash, HP_HASHVAL, aActualHash.data(), &nActualHash, 0))
+ {
+ SAL_WARN("svl.crypto", "CryptGetHashParam() failed to provide the hash");
+ return false;
+ }
+
+ CryptDestroyHash(hHash);
+ CryptReleaseContext(hProv, 0);
+
+ return aActualHash.size() == rExpectedHash.size() &&
+ !std::memcmp(aActualHash.data(), rExpectedHash.data(), aActualHash.size());
+}
+
+OUString GetSubjectName(PCCERT_CONTEXT pCertContext)
+{
+ OUString subjectName;
+
+ // Get Subject name size.
+ DWORD dwData = CertGetNameStringW(pCertContext,
+ CERT_NAME_SIMPLE_DISPLAY_TYPE,
+ 0,
+ nullptr,
+ nullptr,
+ 0);
+ if (!dwData)
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: CertGetNameString failed");
+ return subjectName;
+ }
+
+ // Allocate memory for subject name.
+ LPWSTR szName = static_cast<LPWSTR>(
+ LocalAlloc(LPTR, dwData * sizeof(WCHAR)));
+ if (!szName)
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: Unable to allocate memory for subject name");
+ return subjectName;
+ }
+
+ // Get subject name.
+ if (!CertGetNameStringW(pCertContext,
+ CERT_NAME_SIMPLE_DISPLAY_TYPE,
+ 0,
+ nullptr,
+ szName,
+ dwData))
+ {
+ LocalFree(szName);
+ SAL_WARN("svl.crypto", "ValidateSignature: CertGetNameString failed");
+ return subjectName;
+ }
+
+ subjectName = o3tl::toU(szName);
+ LocalFree(szName);
+
+ return subjectName;
+}
+#endif // USE_CRYPTO_MSCAPI
+
+#if USE_CRYPTO_NSS
+ void ensureNssInit()
+ {
+ // e.g. tdf#122599 ensure NSS library is initialized for NSS_CMSMessage_CreateFromDER
+ css::uno::Reference<css::xml::crypto::XNSSInitializer>
+ xNSSInitializer = css::xml::crypto::NSSInitializer::create(comphelper::getProcessComponentContext());
+
+ // this calls NSS_Init
+ xNSSInitializer->getDigestContext(css::xml::crypto::DigestID::SHA256,
+ uno::Sequence<beans::NamedValue>());
+ }
+#endif
+} // anonymous namespace
+
+bool Signing::Verify(const std::vector<unsigned char>& aData,
+ const bool bNonDetached,
+ const std::vector<unsigned char>& aSignature,
+ SignatureInformation& rInformation)
+{
+#if USE_CRYPTO_NSS
+ // ensure NSS_Init() is called before using NSS_CMSMessage_CreateFromDER
+ static std::once_flag aInitOnce;
+ std::call_once(aInitOnce, ensureNssInit);
+
+ // Validate the signature.
+ SECItem aSignatureItem;
+ aSignatureItem.data = const_cast<unsigned char*>(aSignature.data());
+ aSignatureItem.len = aSignature.size();
+ NSSCMSMessage* pCMSMessage = NSS_CMSMessage_CreateFromDER(&aSignatureItem,
+ /*cb=*/nullptr,
+ /*cb_arg=*/nullptr,
+ /*pwfn=*/nullptr,
+ /*pwfn_arg=*/nullptr,
+ /*decrypt_key_cb=*/nullptr,
+ /*decrypt_key_cb_arg=*/nullptr);
+ if (!NSS_CMSMessage_IsSigned(pCMSMessage))
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: message is not signed");
+ return false;
+ }
+
+ NSSCMSContentInfo* pCMSContentInfo = NSS_CMSMessage_ContentLevel(pCMSMessage, 0);
+ if (!pCMSContentInfo)
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: NSS_CMSMessage_ContentLevel() failed");
+ return false;
+ }
+
+ auto pCMSSignedData = static_cast<NSSCMSSignedData*>(NSS_CMSContentInfo_GetContent(pCMSContentInfo));
+ if (!pCMSSignedData)
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: NSS_CMSContentInfo_GetContent() failed");
+ return false;
+ }
+
+ // Import certificates from the signed data temporarily, so it'll be
+ // possible to verify the signature, even if we didn't have the certificate
+ // previously.
+ std::vector<CERTCertificate*> aDocumentCertificates;
+ for (size_t i = 0; pCMSSignedData->rawCerts[i]; ++i)
+ aDocumentCertificates.push_back(CERT_NewTempCertificate(CERT_GetDefaultCertDB(), pCMSSignedData->rawCerts[i], nullptr, 0, 0));
+
+ NSSCMSSignerInfo* pCMSSignerInfo = NSS_CMSSignedData_GetSignerInfo(pCMSSignedData, 0);
+ if (!pCMSSignerInfo)
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: NSS_CMSSignedData_GetSignerInfo() failed");
+ return false;
+ }
+
+ SECItem aAlgorithm = NSS_CMSSignedData_GetDigestAlgs(pCMSSignedData)[0]->algorithm;
+ SECOidTag eOidTag = SECOID_FindOIDTag(&aAlgorithm);
+
+ // Map a sign algorithm to a digest algorithm.
+ // See NSS_CMSUtil_MapSignAlgs(), which is private to us.
+ switch (eOidTag)
+ {
+ case SEC_OID_PKCS1_SHA1_WITH_RSA_ENCRYPTION:
+ eOidTag = SEC_OID_SHA1;
+ break;
+ case SEC_OID_PKCS1_SHA256_WITH_RSA_ENCRYPTION:
+ eOidTag = SEC_OID_SHA256;
+ break;
+ case SEC_OID_PKCS1_SHA512_WITH_RSA_ENCRYPTION:
+ eOidTag = SEC_OID_SHA512;
+ break;
+ default:
+ break;
+ }
+
+ HASH_HashType eHashType = HASH_GetHashTypeByOidTag(eOidTag);
+ HASHContext* pHASHContext = HASH_Create(eHashType);
+ if (!pHASHContext)
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: HASH_Create() failed");
+ return false;
+ }
+
+ // We have a hash, update it with the byte ranges.
+ HASH_Update(pHASHContext, aData.data(), aData.size());
+
+ // Find out what is the expected length of the hash.
+ unsigned int nMaxResultLen = 0;
+ switch (eOidTag)
+ {
+ case SEC_OID_SHA1:
+ nMaxResultLen = comphelper::SHA1_HASH_LENGTH;
+ rInformation.nDigestID = xml::crypto::DigestID::SHA1;
+ break;
+ case SEC_OID_SHA256:
+ nMaxResultLen = comphelper::SHA256_HASH_LENGTH;
+ rInformation.nDigestID = xml::crypto::DigestID::SHA256;
+ break;
+ case SEC_OID_SHA512:
+ nMaxResultLen = comphelper::SHA512_HASH_LENGTH;
+ rInformation.nDigestID = xml::crypto::DigestID::SHA512;
+ break;
+ default:
+ SAL_WARN("svl.crypto", "ValidateSignature: unrecognized algorithm");
+ return false;
+ }
+
+ auto pActualResultBuffer = static_cast<unsigned char*>(PORT_Alloc(nMaxResultLen));
+ unsigned int nActualResultLen;
+ HASH_End(pHASHContext, pActualResultBuffer, &nActualResultLen, nMaxResultLen);
+
+ CERTCertificate* pCertificate = NSS_CMSSignerInfo_GetSigningCertificate(pCMSSignerInfo, CERT_GetDefaultCertDB());
+ if (!pCertificate)
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: NSS_CMSSignerInfo_GetSigningCertificate() failed");
+ return false;
+ }
+ else
+ {
+ uno::Sequence<sal_Int8> aDerCert(pCertificate->derCert.len);
+ auto aDerCertRange = asNonConstRange(aDerCert);
+ for (size_t i = 0; i < pCertificate->derCert.len; ++i)
+ aDerCertRange[i] = pCertificate->derCert.data[i];
+ OUStringBuffer aBuffer;
+ comphelper::Base64::encode(aBuffer, aDerCert);
+ SignatureInformation::X509Data temp;
+ temp.emplace_back();
+ temp.back().X509Certificate = aBuffer.makeStringAndClear();
+ temp.back().X509Subject = OUString(pCertificate->subjectName, PL_strlen(pCertificate->subjectName), RTL_TEXTENCODING_UTF8);
+ rInformation.X509Datas.clear();
+ rInformation.X509Datas.emplace_back(temp);
+ }
+
+ PRTime nSigningTime;
+ // This may fail, in which case the date should be taken from the PDF's dictionary's "M" key,
+ // so not critical for PDF at least.
+ if (NSS_CMSSignerInfo_GetSigningTime(pCMSSignerInfo, &nSigningTime) == SECSuccess)
+ {
+ // First convert the UTC UNIX timestamp to a tools::DateTime.
+ // nSigningTime is in microseconds.
+ DateTime aDateTime = DateTime::CreateFromUnixTime(static_cast<double>(nSigningTime) / 1000000);
+
+ // Then convert to a local UNO DateTime.
+ aDateTime.ConvertToLocalTime();
+ rInformation.stDateTime = aDateTime.GetUNODateTime();
+ if (rInformation.ouDateTime.isEmpty())
+ {
+ OUStringBuffer rBuffer;
+ rBuffer.append(static_cast<sal_Int32>(aDateTime.GetYear()));
+ rBuffer.append('-');
+ if (aDateTime.GetMonth() < 10)
+ rBuffer.append('0');
+ rBuffer.append(static_cast<sal_Int32>(aDateTime.GetMonth()));
+ rBuffer.append('-');
+ if (aDateTime.GetDay() < 10)
+ rBuffer.append('0');
+ rBuffer.append(static_cast<sal_Int32>(aDateTime.GetDay()));
+ rInformation.ouDateTime = rBuffer.makeStringAndClear();
+ }
+ }
+
+ // Check if we have a signing certificate attribute.
+ SECOidData aOidData;
+ aOidData.oid.data = nullptr;
+ /*
+ * id-aa-signingCertificateV2 OBJECT IDENTIFIER ::=
+ * { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs9(9)
+ * smime(16) id-aa(2) 47 }
+ */
+ if (StringToOID(&aOidData.oid, "1.2.840.113549.1.9.16.2.47", 0) != SECSuccess)
+ {
+ SAL_WARN("svl.crypto", "StringToOID() failed");
+ return false;
+ }
+ aOidData.offset = SEC_OID_UNKNOWN;
+ aOidData.desc = "id-aa-signingCertificateV2";
+ aOidData.mechanism = CKM_SHA_1;
+ aOidData.supportedExtension = UNSUPPORTED_CERT_EXTENSION;
+ NSSCMSAttribute* pAttribute = CMSAttributeArray_FindAttrByOidData(pCMSSignerInfo->authAttr, &aOidData, PR_TRUE);
+ if (pAttribute)
+ rInformation.bHasSigningCertificate = true;
+
+ SECItem* pContentInfoContentData = pCMSSignedData->contentInfo.content.data;
+ if (bNonDetached && pContentInfoContentData && pContentInfoContentData->data)
+ {
+ // Not a detached signature.
+ if (!std::memcmp(pActualResultBuffer, pContentInfoContentData->data, nMaxResultLen) && nActualResultLen == pContentInfoContentData->len)
+ rInformation.nStatus = xml::crypto::SecurityOperationStatus_OPERATION_SUCCEEDED;
+ }
+ else
+ {
+ // Detached, the usual case.
+ SECItem aActualResultItem;
+ aActualResultItem.data = pActualResultBuffer;
+ aActualResultItem.len = nActualResultLen;
+ if (NSS_CMSSignerInfo_Verify(pCMSSignerInfo, &aActualResultItem, nullptr) == SECSuccess)
+ rInformation.nStatus = xml::crypto::SecurityOperationStatus_OPERATION_SUCCEEDED;
+ }
+
+ // Everything went fine
+ SECITEM_FreeItem(&aOidData.oid, false);
+ PORT_Free(pActualResultBuffer);
+ HASH_Destroy(pHASHContext);
+ NSS_CMSSignerInfo_Destroy(pCMSSignerInfo);
+ for (auto pDocumentCertificate : aDocumentCertificates)
+ CERT_DestroyCertificate(pDocumentCertificate);
+
+ return true;
+
+#elif USE_CRYPTO_MSCAPI // ends USE_CRYPTO_NSS
+
+ // Open a message for decoding.
+ HCRYPTMSG hMsg = CryptMsgOpenToDecode(PKCS_7_ASN_ENCODING | X509_ASN_ENCODING,
+ CMSG_DETACHED_FLAG,
+ 0,
+ 0,
+ nullptr,
+ nullptr);
+ if (!hMsg)
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: CryptMsgOpenToDecode() failed");
+ return false;
+ }
+
+ // Update the message with the encoded header blob.
+ if (!CryptMsgUpdate(hMsg, aSignature.data(), aSignature.size(), TRUE))
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature, CryptMsgUpdate() for the header failed: " << WindowsErrorString(GetLastError()));
+ return false;
+ }
+
+ // Update the message with the content blob.
+ if (!CryptMsgUpdate(hMsg, aData.data(), aData.size(), FALSE))
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature, CryptMsgUpdate() for the content failed: " << WindowsErrorString(GetLastError()));
+ return false;
+ }
+
+ if (!CryptMsgUpdate(hMsg, nullptr, 0, TRUE))
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature, CryptMsgUpdate() for the last content failed: " << WindowsErrorString(GetLastError()));
+ return false;
+ }
+
+ // Get the CRYPT_ALGORITHM_IDENTIFIER from the message.
+ DWORD nDigestID = 0;
+ if (!CryptMsgGetParam(hMsg, CMSG_SIGNER_HASH_ALGORITHM_PARAM, 0, nullptr, &nDigestID))
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: CryptMsgGetParam() failed: " << WindowsErrorString(GetLastError()));
+ return false;
+ }
+ std::unique_ptr<BYTE[]> pDigestBytes(new BYTE[nDigestID]);
+ if (!CryptMsgGetParam(hMsg, CMSG_SIGNER_HASH_ALGORITHM_PARAM, 0, pDigestBytes.get(), &nDigestID))
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: CryptMsgGetParam() failed: " << WindowsErrorString(GetLastError()));
+ return false;
+ }
+ auto pDigestID = reinterpret_cast<CRYPT_ALGORITHM_IDENTIFIER*>(pDigestBytes.get());
+ if (std::string_view(szOID_NIST_sha256) == pDigestID->pszObjId)
+ rInformation.nDigestID = xml::crypto::DigestID::SHA256;
+ else if (std::string_view(szOID_RSA_SHA1RSA) == pDigestID->pszObjId || std::string_view(szOID_OIWSEC_sha1) == pDigestID->pszObjId)
+ rInformation.nDigestID = xml::crypto::DigestID::SHA1;
+ else
+ // Don't error out here, we can still verify the message digest correctly, just the digest ID won't be set.
+ SAL_WARN("svl.crypto", "ValidateSignature: unhandled algorithm identifier '"<<pDigestID->pszObjId<<"'");
+
+ // Get the signer CERT_INFO from the message.
+ DWORD nSignerCertInfo = 0;
+ if (!CryptMsgGetParam(hMsg, CMSG_SIGNER_CERT_INFO_PARAM, 0, nullptr, &nSignerCertInfo))
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: CryptMsgGetParam() failed");
+ return false;
+ }
+ std::unique_ptr<BYTE[]> pSignerCertInfoBuf(new BYTE[nSignerCertInfo]);
+ if (!CryptMsgGetParam(hMsg, CMSG_SIGNER_CERT_INFO_PARAM, 0, pSignerCertInfoBuf.get(), &nSignerCertInfo))
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: CryptMsgGetParam() failed");
+ return false;
+ }
+ PCERT_INFO pSignerCertInfo = reinterpret_cast<PCERT_INFO>(pSignerCertInfoBuf.get());
+
+ // Open a certificate store in memory using CERT_STORE_PROV_MSG, which
+ // initializes it with the certificates from the message.
+ HCERTSTORE hStoreHandle = CertOpenStore(CERT_STORE_PROV_MSG,
+ PKCS_7_ASN_ENCODING | X509_ASN_ENCODING,
+ 0,
+ 0,
+ hMsg);
+ if (!hStoreHandle)
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: CertOpenStore() failed");
+ return false;
+ }
+
+ // Find the signer's certificate in the store.
+ PCCERT_CONTEXT pSignerCertContext = CertGetSubjectCertificateFromStore(hStoreHandle,
+ PKCS_7_ASN_ENCODING | X509_ASN_ENCODING,
+ pSignerCertInfo);
+ if (!pSignerCertContext)
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: CertGetSubjectCertificateFromStore() failed");
+ return false;
+ }
+ else
+ {
+ // Write rInformation.ouX509Certificate.
+ uno::Sequence<sal_Int8> aDerCert(pSignerCertContext->cbCertEncoded);
+ std::copy_n(pSignerCertContext->pbCertEncoded, pSignerCertContext->cbCertEncoded,
+ aDerCert.getArray());
+ OUStringBuffer aBuffer;
+ comphelper::Base64::encode(aBuffer, aDerCert);
+ SignatureInformation::X509Data temp;
+ temp.emplace_back();
+ temp.back().X509Certificate = aBuffer.makeStringAndClear();
+ temp.back().X509Subject = GetSubjectName(pSignerCertContext);
+ rInformation.X509Datas.clear();
+ rInformation.X509Datas.emplace_back(temp);
+ }
+
+ if (bNonDetached)
+ {
+ // Not a detached signature.
+ DWORD nContentParam = 0;
+ if (!CryptMsgGetParam(hMsg, CMSG_CONTENT_PARAM, 0, nullptr, &nContentParam))
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: CryptMsgGetParam() failed");
+ return false;
+ }
+
+ std::vector<BYTE> aContentParam(nContentParam);
+ if (!CryptMsgGetParam(hMsg, CMSG_CONTENT_PARAM, 0, aContentParam.data(), &nContentParam))
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: CryptMsgGetParam() failed");
+ return false;
+ }
+
+ if (VerifyNonDetachedSignature(aData, aContentParam))
+ rInformation.nStatus = xml::crypto::SecurityOperationStatus_OPERATION_SUCCEEDED;
+ }
+ else
+ {
+ // Detached, the usual case.
+ // Use the CERT_INFO from the signer certificate to verify the signature.
+ if (CryptMsgControl(hMsg, 0, CMSG_CTRL_VERIFY_SIGNATURE, pSignerCertContext->pCertInfo))
+ rInformation.nStatus = xml::crypto::SecurityOperationStatus_OPERATION_SUCCEEDED;
+ }
+
+ // Check if we have a signing certificate attribute.
+ DWORD nSignedAttributes = 0;
+ if (CryptMsgGetParam(hMsg, CMSG_SIGNER_AUTH_ATTR_PARAM, 0, nullptr, &nSignedAttributes))
+ {
+ std::unique_ptr<BYTE[]> pSignedAttributesBuf(new BYTE[nSignedAttributes]);
+ if (!CryptMsgGetParam(hMsg, CMSG_SIGNER_AUTH_ATTR_PARAM, 0, pSignedAttributesBuf.get(), &nSignedAttributes))
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: CryptMsgGetParam() authenticated failed");
+ return false;
+ }
+ auto pSignedAttributes = reinterpret_cast<PCRYPT_ATTRIBUTES>(pSignedAttributesBuf.get());
+ for (size_t nAttr = 0; nAttr < pSignedAttributes->cAttr; ++nAttr)
+ {
+ CRYPT_ATTRIBUTE& rAttr = pSignedAttributes->rgAttr[nAttr];
+ /*
+ * id-aa-signingCertificateV2 OBJECT IDENTIFIER ::=
+ * { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs9(9)
+ * smime(16) id-aa(2) 47 }
+ */
+ if (std::string_view("1.2.840.113549.1.9.16.2.47") == rAttr.pszObjId)
+ {
+ rInformation.bHasSigningCertificate = true;
+ break;
+ }
+ }
+ }
+
+ // Get the unauthorized attributes.
+ nSignedAttributes = 0;
+ if (CryptMsgGetParam(hMsg, CMSG_SIGNER_UNAUTH_ATTR_PARAM, 0, nullptr, &nSignedAttributes))
+ {
+ std::unique_ptr<BYTE[]> pSignedAttributesBuf(new BYTE[nSignedAttributes]);
+ if (!CryptMsgGetParam(hMsg, CMSG_SIGNER_UNAUTH_ATTR_PARAM, 0, pSignedAttributesBuf.get(), &nSignedAttributes))
+ {
+ SAL_WARN("svl.crypto", "ValidateSignature: CryptMsgGetParam() unauthenticated failed");
+ return false;
+ }
+ auto pSignedAttributes = reinterpret_cast<PCRYPT_ATTRIBUTES>(pSignedAttributesBuf.get());
+ for (size_t nAttr = 0; nAttr < pSignedAttributes->cAttr; ++nAttr)
+ {
+ CRYPT_ATTRIBUTE& rAttr = pSignedAttributes->rgAttr[nAttr];
+ // Timestamp blob
+ if (std::string_view("1.2.840.113549.1.9.16.2.14") == rAttr.pszObjId)
+ {
+ PCRYPT_TIMESTAMP_CONTEXT pTsContext;
+ if (!CryptVerifyTimeStampSignature(rAttr.rgValue->pbData, rAttr.rgValue->cbData, nullptr, 0, nullptr, &pTsContext, nullptr, nullptr))
+ {
+ SAL_WARN("svl.crypto", "CryptMsgUpdate failed: " << WindowsErrorString(GetLastError()));
+ break;
+ }
+
+ DateTime aDateTime = DateTime::CreateFromWin32FileDateTime(pTsContext->pTimeStamp->ftTime.dwLowDateTime, pTsContext->pTimeStamp->ftTime.dwHighDateTime);
+
+ // Then convert to a local UNO DateTime.
+ aDateTime.ConvertToLocalTime();
+ rInformation.stDateTime = aDateTime.GetUNODateTime();
+ if (rInformation.ouDateTime.isEmpty())
+ {
+ OUStringBuffer rBuffer;
+ rBuffer.append(static_cast<sal_Int32>(aDateTime.GetYear()));
+ rBuffer.append('-');
+ if (aDateTime.GetMonth() < 10)
+ rBuffer.append('0');
+ rBuffer.append(static_cast<sal_Int32>(aDateTime.GetMonth()));
+ rBuffer.append('-');
+ if (aDateTime.GetDay() < 10)
+ rBuffer.append('0');
+ rBuffer.append(static_cast<sal_Int32>(aDateTime.GetDay()));
+ rInformation.ouDateTime = rBuffer.makeStringAndClear();
+ }
+ break;
+ }
+ }
+ }
+
+ CertCloseStore(hStoreHandle, CERT_CLOSE_STORE_FORCE_FLAG);
+ CryptMsgClose(hMsg);
+ return true;
+#else
+ // Not implemented.
+ (void)aData;
+ (void)bNonDetached;
+ (void)aSignature;
+ (void)rInformation;
+ return false;
+#endif
+}
+
+bool Signing::Verify(SvStream& rStream,
+ const std::vector<std::pair<size_t, size_t>>& aByteRanges,
+ const bool bNonDetached,
+ const std::vector<unsigned char>& aSignature,
+ SignatureInformation& rInformation)
+{
+#if USE_CRYPTO_ANY
+ std::vector<unsigned char> buffer;
+
+ // Copy the byte ranges into a single buffer.
+ for (const auto& rByteRange : aByteRanges)
+ {
+ rStream.Seek(rByteRange.first);
+ const size_t size = buffer.size();
+ buffer.resize(size + rByteRange.second);
+ rStream.ReadBytes(buffer.data() + size, rByteRange.second);
+ }
+
+ return Verify(buffer, bNonDetached, aSignature, rInformation);
+
+#else
+ // Not implemented.
+ (void)rStream;
+ (void)aByteRanges;
+ (void)bNonDetached;
+ (void)aSignature;
+ (void)rInformation;
+ return false;
+#endif
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-26 21:14:35 +0000