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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 09:59:15 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 09:59:15 +0000
commit8de1ee1b2b676b0d07586f0752750dd6b0fb7511 (patch)
treedd46fd7dc3863045696cd0e48032d8a36fa0daf5 /sm/verify.c
parentInitial commit. (diff)
downloadgnupg2-8de1ee1b2b676b0d07586f0752750dd6b0fb7511.tar.xz
gnupg2-8de1ee1b2b676b0d07586f0752750dd6b0fb7511.zip
Adding upstream version 2.2.27.upstream/2.2.27upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sm/verify.c')
-rw-r--r--sm/verify.c723
1 files changed, 723 insertions, 0 deletions
diff --git a/sm/verify.c b/sm/verify.c
new file mode 100644
index 0000000..0fa365f
--- /dev/null
+++ b/sm/verify.c
@@ -0,0 +1,723 @@
+/* verify.c - Verify a messages signature
+ * Copyright (C) 2001, 2002, 2003, 2007,
+ * 2010 Free Software Foundation, Inc.
+ * Copyright (C) 2001-2019 Werner Koch
+ * Copyright (C) 2015-2020 g10 Code GmbH
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <time.h>
+#include <assert.h>
+
+#include "gpgsm.h"
+#include <gcrypt.h>
+#include <ksba.h>
+
+#include "keydb.h"
+#include "../common/i18n.h"
+#include "../common/compliance.h"
+
+static char *
+strtimestamp_r (ksba_isotime_t atime)
+{
+ char *buffer = xmalloc (15);
+
+ if (!atime || !*atime)
+ strcpy (buffer, "none");
+ else
+ sprintf (buffer, "%.4s-%.2s-%.2s", atime, atime+4, atime+6);
+ return buffer;
+}
+
+
+
+/* Hash the data for a detached signature. Returns 0 on success. */
+static gpg_error_t
+hash_data (int fd, gcry_md_hd_t md)
+{
+ gpg_error_t err = 0;
+ estream_t fp;
+ char buffer[4096];
+ int nread;
+
+ fp = es_fdopen_nc (fd, "rb");
+ if (!fp)
+ {
+ err = gpg_error_from_syserror ();
+ log_error ("fdopen(%d) failed: %s\n", fd, gpg_strerror (err));
+ return err;
+ }
+
+ do
+ {
+ nread = es_fread (buffer, 1, DIM(buffer), fp);
+ gcry_md_write (md, buffer, nread);
+ }
+ while (nread);
+ if (es_ferror (fp))
+ {
+ err = gpg_error_from_syserror ();
+ log_error ("read error on fd %d: %s\n", fd, gpg_strerror (err));
+ }
+ es_fclose (fp);
+ return err;
+}
+
+
+
+
+/* Perform a verify operation. To verify detached signatures, DATA_FD
+ must be different than -1. With OUT_FP given and a non-detached
+ signature, the signed material is written to that stream. */
+int
+gpgsm_verify (ctrl_t ctrl, int in_fd, int data_fd, estream_t out_fp)
+{
+ int i, rc;
+ gnupg_ksba_io_t b64reader = NULL;
+ gnupg_ksba_io_t b64writer = NULL;
+ ksba_reader_t reader;
+ ksba_writer_t writer = NULL;
+ ksba_cms_t cms = NULL;
+ ksba_stop_reason_t stopreason;
+ ksba_cert_t cert;
+ KEYDB_HANDLE kh;
+ gcry_md_hd_t data_md = NULL;
+ int signer;
+ const char *algoid;
+ int algo;
+ int is_detached;
+ estream_t in_fp = NULL;
+ char *p;
+
+ audit_set_type (ctrl->audit, AUDIT_TYPE_VERIFY);
+
+ kh = keydb_new ();
+ if (!kh)
+ {
+ log_error (_("failed to allocate keyDB handle\n"));
+ rc = gpg_error (GPG_ERR_GENERAL);
+ goto leave;
+ }
+
+
+ in_fp = es_fdopen_nc (in_fd, "rb");
+ if (!in_fp)
+ {
+ rc = gpg_error_from_syserror ();
+ log_error ("fdopen() failed: %s\n", strerror (errno));
+ goto leave;
+ }
+
+ rc = gnupg_ksba_create_reader
+ (&b64reader, ((ctrl->is_pem? GNUPG_KSBA_IO_PEM : 0)
+ | (ctrl->is_base64? GNUPG_KSBA_IO_BASE64 : 0)
+ | (ctrl->autodetect_encoding? GNUPG_KSBA_IO_AUTODETECT : 0)),
+ in_fp, &reader);
+ if (rc)
+ {
+ log_error ("can't create reader: %s\n", gpg_strerror (rc));
+ goto leave;
+ }
+
+ if (out_fp)
+ {
+ rc = gnupg_ksba_create_writer
+ (&b64writer, ((ctrl->create_pem? GNUPG_KSBA_IO_PEM : 0)
+ | (ctrl->create_base64? GNUPG_KSBA_IO_BASE64 : 0)),
+ ctrl->pem_name, out_fp, &writer);
+ if (rc)
+ {
+ log_error ("can't create writer: %s\n", gpg_strerror (rc));
+ goto leave;
+ }
+ }
+
+ rc = ksba_cms_new (&cms);
+ if (rc)
+ goto leave;
+
+ rc = ksba_cms_set_reader_writer (cms, reader, writer);
+ if (rc)
+ {
+ log_error ("ksba_cms_set_reader_writer failed: %s\n",
+ gpg_strerror (rc));
+ goto leave;
+ }
+
+ rc = gcry_md_open (&data_md, 0, 0);
+ if (rc)
+ {
+ log_error ("md_open failed: %s\n", gpg_strerror (rc));
+ goto leave;
+ }
+ if (DBG_HASHING)
+ gcry_md_debug (data_md, "vrfy.data");
+
+ audit_log (ctrl->audit, AUDIT_SETUP_READY);
+
+ is_detached = 0;
+ do
+ {
+ rc = ksba_cms_parse (cms, &stopreason);
+ if (rc)
+ {
+ log_error ("ksba_cms_parse failed: %s\n", gpg_strerror (rc));
+ goto leave;
+ }
+
+ if (stopreason == KSBA_SR_NEED_HASH)
+ {
+ is_detached = 1;
+ audit_log (ctrl->audit, AUDIT_DETACHED_SIGNATURE);
+ if (opt.verbose)
+ log_info ("detached signature\n");
+ }
+
+ if (stopreason == KSBA_SR_NEED_HASH
+ || stopreason == KSBA_SR_BEGIN_DATA)
+ {
+ audit_log (ctrl->audit, AUDIT_GOT_DATA);
+
+ /* We are now able to enable the hash algorithms */
+ for (i=0; (algoid=ksba_cms_get_digest_algo_list (cms, i)); i++)
+ {
+ algo = gcry_md_map_name (algoid);
+ if (!algo)
+ {
+ log_error ("unknown hash algorithm '%s'\n",
+ algoid? algoid:"?");
+ if (algoid
+ && ( !strcmp (algoid, "1.2.840.113549.1.1.2")
+ ||!strcmp (algoid, "1.2.840.113549.2.2")))
+ log_info (_("(this is the MD2 algorithm)\n"));
+ audit_log_s (ctrl->audit, AUDIT_BAD_DATA_HASH_ALGO, algoid);
+ }
+ else
+ {
+ if (DBG_X509)
+ log_debug ("enabling hash algorithm %d (%s)\n",
+ algo, algoid? algoid:"");
+ gcry_md_enable (data_md, algo);
+ audit_log_i (ctrl->audit, AUDIT_DATA_HASH_ALGO, algo);
+ }
+ }
+ if (opt.extra_digest_algo)
+ {
+ if (DBG_X509)
+ log_debug ("enabling extra hash algorithm %d\n",
+ opt.extra_digest_algo);
+ gcry_md_enable (data_md, opt.extra_digest_algo);
+ audit_log_i (ctrl->audit, AUDIT_DATA_HASH_ALGO,
+ opt.extra_digest_algo);
+ }
+ if (is_detached)
+ {
+ if (data_fd == -1)
+ {
+ log_info ("detached signature w/o data "
+ "- assuming certs-only\n");
+ audit_log (ctrl->audit, AUDIT_CERT_ONLY_SIG);
+ }
+ else
+ audit_log_ok (ctrl->audit, AUDIT_DATA_HASHING,
+ hash_data (data_fd, data_md));
+ }
+ else
+ {
+ ksba_cms_set_hash_function (cms, HASH_FNC, data_md);
+ }
+ }
+ else if (stopreason == KSBA_SR_END_DATA)
+ { /* The data bas been hashed */
+ audit_log_ok (ctrl->audit, AUDIT_DATA_HASHING, 0);
+ }
+ }
+ while (stopreason != KSBA_SR_READY);
+
+ if (b64writer)
+ {
+ rc = gnupg_ksba_finish_writer (b64writer);
+ if (rc)
+ {
+ log_error ("write failed: %s\n", gpg_strerror (rc));
+ audit_log_ok (ctrl->audit, AUDIT_WRITE_ERROR, rc);
+ goto leave;
+ }
+ }
+
+ if (data_fd != -1 && !is_detached)
+ {
+ log_error ("data given for a non-detached signature\n");
+ rc = gpg_error (GPG_ERR_CONFLICT);
+ audit_log (ctrl->audit, AUDIT_USAGE_ERROR);
+ goto leave;
+ }
+
+ for (i=0; (cert=ksba_cms_get_cert (cms, i)); i++)
+ {
+ /* Fixme: it might be better to check the validity of the
+ certificate first before entering it into the DB. This way
+ we would avoid cluttering the DB with invalid
+ certificates. */
+ audit_log_cert (ctrl->audit, AUDIT_SAVE_CERT, cert,
+ keydb_store_cert (ctrl, cert, 0, NULL));
+ ksba_cert_release (cert);
+ }
+
+ cert = NULL;
+ for (signer=0; ; signer++)
+ {
+ char *issuer = NULL;
+ gcry_sexp_t sigval = NULL;
+ ksba_isotime_t sigtime, keyexptime;
+ ksba_sexp_t serial;
+ char *msgdigest = NULL;
+ size_t msgdigestlen;
+ char *ctattr;
+ int sigval_hash_algo;
+ int info_pkalgo;
+ unsigned int nbits;
+ int pkalgo;
+ char *pkalgostr = NULL;
+ char *pkfpr = NULL;
+ unsigned int pkalgoflags, verifyflags;
+
+ rc = ksba_cms_get_issuer_serial (cms, signer, &issuer, &serial);
+ if (!signer && gpg_err_code (rc) == GPG_ERR_NO_DATA
+ && data_fd == -1 && is_detached)
+ {
+ log_info ("certs-only message accepted\n");
+ rc = 0;
+ break;
+ }
+ if (rc)
+ {
+ if (signer && rc == -1)
+ rc = 0;
+ break;
+ }
+
+ gpgsm_status (ctrl, STATUS_NEWSIG, NULL);
+ audit_log_i (ctrl->audit, AUDIT_NEW_SIG, signer);
+
+ if (DBG_X509)
+ {
+ log_debug ("signer %d - issuer: '%s'\n",
+ signer, issuer? issuer:"[NONE]");
+ log_debug ("signer %d - serial: ", signer);
+ gpgsm_dump_serial (serial);
+ log_printf ("\n");
+ }
+ if (ctrl->audit)
+ {
+ char *tmpstr = gpgsm_format_sn_issuer (serial, issuer);
+ audit_log_s (ctrl->audit, AUDIT_SIG_NAME, tmpstr);
+ xfree (tmpstr);
+ }
+
+ rc = ksba_cms_get_signing_time (cms, signer, sigtime);
+ if (gpg_err_code (rc) == GPG_ERR_NO_DATA)
+ *sigtime = 0;
+ else if (rc)
+ {
+ log_error ("error getting signing time: %s\n", gpg_strerror (rc));
+ *sigtime = 0; /* (we can't encode an error in the time string.) */
+ }
+
+ rc = ksba_cms_get_message_digest (cms, signer,
+ &msgdigest, &msgdigestlen);
+ if (!rc)
+ {
+ algoid = ksba_cms_get_digest_algo (cms, signer);
+ algo = gcry_md_map_name (algoid);
+ if (DBG_X509)
+ log_debug ("signer %d - digest algo: %d\n", signer, algo);
+ if (! gcry_md_is_enabled (data_md, algo))
+ {
+ log_error ("digest algo %d (%s) has not been enabled\n",
+ algo, algoid?algoid:"");
+ audit_log_s (ctrl->audit, AUDIT_SIG_STATUS, "unsupported");
+ goto next_signer;
+ }
+ }
+ else if (gpg_err_code (rc) == GPG_ERR_NO_DATA)
+ {
+ assert (!msgdigest);
+ rc = 0;
+ algoid = NULL;
+ algo = 0;
+ }
+ else /* real error */
+ {
+ audit_log_s (ctrl->audit, AUDIT_SIG_STATUS, "error");
+ break;
+ }
+
+ rc = ksba_cms_get_sigattr_oids (cms, signer,
+ "1.2.840.113549.1.9.3", &ctattr);
+ if (!rc)
+ {
+ const char *s;
+
+ if (DBG_X509)
+ log_debug ("signer %d - content-type attribute: %s",
+ signer, ctattr);
+
+ s = ksba_cms_get_content_oid (cms, 1);
+ if (!s || strcmp (ctattr, s))
+ {
+ log_error ("content-type attribute does not match "
+ "actual content-type\n");
+ ksba_free (ctattr);
+ ctattr = NULL;
+ audit_log_s (ctrl->audit, AUDIT_SIG_STATUS, "bad");
+ goto next_signer;
+ }
+ ksba_free (ctattr);
+ ctattr = NULL;
+ }
+ else if (rc != -1)
+ {
+ log_error ("error getting content-type attribute: %s\n",
+ gpg_strerror (rc));
+ audit_log_s (ctrl->audit, AUDIT_SIG_STATUS, "bad");
+ goto next_signer;
+ }
+ rc = 0;
+
+
+ sigval = gpgsm_ksba_cms_get_sig_val (cms, signer);
+ if (!sigval)
+ {
+ log_error ("no signature value available\n");
+ audit_log_s (ctrl->audit, AUDIT_SIG_STATUS, "bad");
+ goto next_signer;
+ }
+
+ sigval_hash_algo = gpgsm_get_hash_algo_from_sigval (sigval, &pkalgoflags);
+ if (DBG_X509)
+ {
+ log_debug ("signer %d - signature available (sigval hash=%d pkaf=%u)",
+ signer, sigval_hash_algo, pkalgoflags);
+ }
+ if (!sigval_hash_algo)
+ sigval_hash_algo = algo; /* Fallback used e.g. with old libksba. */
+
+ /* Find the certificate of the signer */
+ keydb_search_reset (kh);
+ rc = keydb_search_issuer_sn (ctrl, kh, issuer, serial);
+ if (rc)
+ {
+ if (rc == -1)
+ {
+ log_error ("certificate not found\n");
+ rc = gpg_error (GPG_ERR_NO_PUBKEY);
+ }
+ else
+ log_error ("failed to find the certificate: %s\n",
+ gpg_strerror(rc));
+ {
+ char numbuf[50];
+ sprintf (numbuf, "%d", rc);
+
+ gpgsm_status2 (ctrl, STATUS_ERROR, "verify.findkey",
+ numbuf, NULL);
+ }
+ audit_log_s (ctrl->audit, AUDIT_SIG_STATUS, "no-cert");
+ goto next_signer;
+ }
+
+ rc = keydb_get_cert (kh, &cert);
+ if (rc)
+ {
+ log_error ("failed to get cert: %s\n", gpg_strerror (rc));
+ audit_log_s (ctrl->audit, AUDIT_SIG_STATUS, "error");
+ goto next_signer;
+ }
+
+ pkfpr = gpgsm_get_fingerprint_hexstring (cert, GCRY_MD_SHA1);
+ pkalgostr = gpgsm_pubkey_algo_string (cert, NULL);
+ pkalgo = gpgsm_get_key_algo_info (cert, &nbits);
+
+ log_info (_("Signature made "));
+ if (*sigtime)
+ {
+ /* We take the freedom as noted in RFC3339 to use a space
+ * instead of the "T" delimiter between date and time. We
+ * also append a separate UTC instead of a "Z" or "+00:00"
+ * suffix because that makes it clear to everyone what kind
+ * of time this is. */
+ dump_isotime (sigtime);
+ log_printf (" UTC");
+ }
+ else
+ log_printf (_("[date not given]"));
+ log_info (_(" using %s key %s\n"), pkalgostr, pkfpr);
+ if (opt.verbose)
+ {
+ log_info (_("algorithm:"));
+ log_printf (" %s + %s",
+ pubkey_algo_to_string (pkalgo),
+ gcry_md_algo_name (sigval_hash_algo));
+ if (algo != sigval_hash_algo)
+ log_printf (" (%s)", gcry_md_algo_name (algo));
+ log_printf ("\n");
+ }
+
+ audit_log_i (ctrl->audit, AUDIT_DATA_HASH_ALGO, algo);
+
+ /* Check compliance. */
+ if (! gnupg_pk_is_allowed (opt.compliance, PK_USE_VERIFICATION,
+ pkalgo, pkalgoflags, NULL, nbits, NULL))
+ {
+ char kidstr[10+1];
+
+ snprintf (kidstr, sizeof kidstr, "0x%08lX",
+ gpgsm_get_short_fingerprint (cert, NULL));
+ log_error (_("key %s may not be used for signing in %s mode\n"),
+ kidstr,
+ gnupg_compliance_option_string (opt.compliance));
+ goto next_signer;
+ }
+
+ if (!gnupg_digest_is_allowed (opt.compliance, 0, sigval_hash_algo))
+ {
+ log_error (_("digest algorithm '%s' may not be used in %s mode\n"),
+ gcry_md_algo_name (sigval_hash_algo),
+ gnupg_compliance_option_string (opt.compliance));
+ goto next_signer;
+ }
+
+ /* Check compliance with CO_DE_VS. */
+ if (gnupg_pk_is_compliant (CO_DE_VS, pkalgo, pkalgoflags,
+ NULL, nbits, NULL)
+ && gnupg_digest_is_compliant (CO_DE_VS, sigval_hash_algo))
+ gpgsm_status (ctrl, STATUS_VERIFICATION_COMPLIANCE_MODE,
+ gnupg_status_compliance_flag (CO_DE_VS));
+
+
+ /* Now we can check the signature. */
+ if (msgdigest)
+ { /* Signed attributes are available. */
+ gcry_md_hd_t md;
+ unsigned char *s;
+
+ /* Check that the message digest in the signed attributes
+ matches the one we calculated on the data. */
+ s = gcry_md_read (data_md, algo);
+ if ( !s || !msgdigestlen
+ || gcry_md_get_algo_dlen (algo) != msgdigestlen
+ || memcmp (s, msgdigest, msgdigestlen) )
+ {
+ char *fpr;
+
+ log_error (_("invalid signature: message digest attribute "
+ "does not match computed one\n"));
+ if (DBG_X509)
+ {
+ if (msgdigest)
+ log_printhex (msgdigest, msgdigestlen, "message: ");
+ if (s)
+ log_printhex (s, gcry_md_get_algo_dlen (algo),
+ "computed: ");
+ }
+ fpr = gpgsm_fpr_and_name_for_status (cert);
+ gpgsm_status (ctrl, STATUS_BADSIG, fpr);
+ xfree (fpr);
+ audit_log_s (ctrl->audit, AUDIT_SIG_STATUS, "bad");
+ goto next_signer;
+ }
+
+ audit_log_i (ctrl->audit, AUDIT_ATTR_HASH_ALGO, sigval_hash_algo);
+ rc = gcry_md_open (&md, sigval_hash_algo, 0);
+ if (rc)
+ {
+ log_error ("md_open failed: %s\n", gpg_strerror (rc));
+ audit_log_s (ctrl->audit, AUDIT_SIG_STATUS, "error");
+ goto next_signer;
+ }
+ if (DBG_HASHING)
+ gcry_md_debug (md, "vrfy.attr");
+
+ ksba_cms_set_hash_function (cms, HASH_FNC, md);
+ rc = ksba_cms_hash_signed_attrs (cms, signer);
+ if (rc)
+ {
+ log_error ("hashing signed attrs failed: %s\n",
+ gpg_strerror (rc));
+ gcry_md_close (md);
+ audit_log_s (ctrl->audit, AUDIT_SIG_STATUS, "error");
+ goto next_signer;
+ }
+ rc = gpgsm_check_cms_signature (cert, sigval, md, sigval_hash_algo,
+ pkalgoflags, &info_pkalgo);
+ gcry_md_close (md);
+ }
+ else
+ {
+ rc = gpgsm_check_cms_signature (cert, sigval, data_md,
+ algo, pkalgoflags, &info_pkalgo);
+ }
+
+ if (rc)
+ {
+ char *fpr;
+
+ log_error ("invalid signature: %s\n", gpg_strerror (rc));
+ fpr = gpgsm_fpr_and_name_for_status (cert);
+ gpgsm_status (ctrl, STATUS_BADSIG, fpr);
+ xfree (fpr);
+ audit_log_s (ctrl->audit, AUDIT_SIG_STATUS, "bad");
+ goto next_signer;
+ }
+ rc = gpgsm_cert_use_verify_p (cert); /*(this displays an info message)*/
+ if (rc)
+ {
+ gpgsm_status_with_err_code (ctrl, STATUS_ERROR, "verify.keyusage",
+ gpg_err_code (rc));
+ rc = 0;
+ }
+
+ if (DBG_X509)
+ log_debug ("signature okay - checking certs\n");
+ audit_log (ctrl->audit, AUDIT_VALIDATE_CHAIN);
+ rc = gpgsm_validate_chain (ctrl, cert,
+ *sigtime? sigtime : "19700101T000000",
+ keyexptime, 0,
+ NULL, 0, &verifyflags);
+ {
+ char *fpr, *buf, *tstr;
+
+ fpr = gpgsm_fpr_and_name_for_status (cert);
+ if (gpg_err_code (rc) == GPG_ERR_CERT_EXPIRED)
+ {
+ gpgsm_status (ctrl, STATUS_EXPKEYSIG, fpr);
+ rc = 0;
+ }
+ else
+ gpgsm_status (ctrl, STATUS_GOODSIG, fpr);
+
+ xfree (fpr);
+
+ fpr = gpgsm_get_fingerprint_hexstring (cert, GCRY_MD_SHA1);
+ tstr = strtimestamp_r (sigtime);
+ buf = xasprintf ("%s %s %s %s 0 0 %d %d 00", fpr, tstr,
+ *sigtime? sigtime : "0",
+ *keyexptime? keyexptime : "0",
+ info_pkalgo, algo);
+ xfree (tstr);
+ xfree (fpr);
+ gpgsm_status (ctrl, STATUS_VALIDSIG, buf);
+ xfree (buf);
+ }
+
+ audit_log_ok (ctrl->audit, AUDIT_CHAIN_STATUS, rc);
+ if (rc) /* of validate_chain */
+ {
+ log_error ("invalid certification chain: %s\n", gpg_strerror (rc));
+ if (gpg_err_code (rc) == GPG_ERR_BAD_CERT_CHAIN
+ || gpg_err_code (rc) == GPG_ERR_BAD_CERT
+ || gpg_err_code (rc) == GPG_ERR_BAD_CA_CERT
+ || gpg_err_code (rc) == GPG_ERR_CERT_REVOKED)
+ gpgsm_status_with_err_code (ctrl, STATUS_TRUST_NEVER, NULL,
+ gpg_err_code (rc));
+ else
+ gpgsm_status_with_err_code (ctrl, STATUS_TRUST_UNDEFINED, NULL,
+ gpg_err_code (rc));
+ audit_log_s (ctrl->audit, AUDIT_SIG_STATUS, "bad");
+ goto next_signer;
+ }
+
+ audit_log_s (ctrl->audit, AUDIT_SIG_STATUS, "good");
+
+ for (i=0; (p = ksba_cert_get_subject (cert, i)); i++)
+ {
+ log_info (!i? _("Good signature from")
+ : _(" aka"));
+ log_printf (" \"");
+ gpgsm_es_print_name (log_get_stream (), p);
+ log_printf ("\"\n");
+ ksba_free (p);
+ }
+
+ /* Print a note if this is a qualified signature. */
+ {
+ size_t qualbuflen;
+ char qualbuffer[1];
+
+ rc = ksba_cert_get_user_data (cert, "is_qualified", &qualbuffer,
+ sizeof (qualbuffer), &qualbuflen);
+ if (!rc && qualbuflen)
+ {
+ if (*qualbuffer)
+ {
+ log_info (_("This is a qualified signature\n"));
+ if (!opt.qualsig_approval)
+ log_info
+ (_("Note, that this software is not officially approved "
+ "to create or verify such signatures.\n"));
+ }
+ }
+ else if (gpg_err_code (rc) != GPG_ERR_NOT_FOUND)
+ log_error ("get_user_data(is_qualified) failed: %s\n",
+ gpg_strerror (rc));
+ }
+
+ gpgsm_status (ctrl, STATUS_TRUST_FULLY,
+ (verifyflags & VALIDATE_FLAG_STEED)?
+ "0 steed":
+ (verifyflags & VALIDATE_FLAG_CHAIN_MODEL)?
+ "0 chain": "0 shell");
+
+ next_signer:
+ rc = 0;
+ xfree (issuer);
+ xfree (serial);
+ gcry_sexp_release (sigval);
+ xfree (msgdigest);
+ xfree (pkalgostr);
+ xfree (pkfpr);
+ ksba_cert_release (cert);
+ cert = NULL;
+ }
+ rc = 0;
+
+ leave:
+ ksba_cms_release (cms);
+ gnupg_ksba_destroy_reader (b64reader);
+ gnupg_ksba_destroy_writer (b64writer);
+ keydb_release (kh);
+ gcry_md_close (data_md);
+ es_fclose (in_fp);
+
+ if (rc)
+ {
+ char numbuf[50];
+ sprintf (numbuf, "%d", rc );
+ gpgsm_status2 (ctrl, STATUS_ERROR, "verify.leave",
+ numbuf, NULL);
+ }
+
+ return rc;
+}