mirror of
git://git.gnupg.org/gnupg.git
synced 2024-12-22 10:19:57 +01:00
a64b3686b4
all callers. * verify.c (gpgsm_verify): Tweaked usage of log_debug and log_error. Return EXPSIG status and add expiretime to VALIDSIG.
230 lines
5.9 KiB
C
230 lines
5.9 KiB
C
/* certlist.c - build list of certificates
|
||
* Copyright (C) 2001 Free Software Foundation, Inc.
|
||
*
|
||
* 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 2 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, write to the Free Software
|
||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
|
||
*/
|
||
|
||
#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 <gcrypt.h>
|
||
#include <ksba.h>
|
||
|
||
#include "gpgsm.h"
|
||
#include "keydb.h"
|
||
#include "i18n.h"
|
||
|
||
/* Return 0 if the cert is usable for encryption. A MODE of 0 checks
|
||
for signing a MODE of 1 checks for encryption, a MODE of 2 checks
|
||
for verification and a MODE of 3 for decryption (just for
|
||
debugging) */
|
||
static int
|
||
cert_usage_p (KsbaCert cert, int mode)
|
||
{
|
||
KsbaError err;
|
||
unsigned int use;
|
||
|
||
err = ksba_cert_get_key_usage (cert, &use);
|
||
if (err == KSBA_No_Data)
|
||
{
|
||
if (opt.verbose && mode < 2)
|
||
log_info (mode?
|
||
_("no key usage specified - accepted for encryption\n"):
|
||
_("no key usage specified - accepted for signing\n"));
|
||
return 0;
|
||
}
|
||
if (err)
|
||
{
|
||
log_error (_("error getting key usage information: %s\n"),
|
||
ksba_strerror (err));
|
||
return map_ksba_err (err);
|
||
}
|
||
|
||
if ((use & ((mode&1)? KSBA_KEYUSAGE_DIGITAL_SIGNATURE
|
||
: KSBA_KEYUSAGE_KEY_ENCIPHERMENT)))
|
||
return 0;
|
||
log_info (mode==3? _("certificate should have not been used for encryption\n"):
|
||
mode==2? _("certificate should have not been used for signing\n"):
|
||
mode==1? _("certificate is not usable for encryption\n"):
|
||
_("certificate is not usable for signing\n"));
|
||
return GNUPG_Wrong_Key_Usage;
|
||
}
|
||
|
||
|
||
/* Return 0 if the cert is usable for signing */
|
||
int
|
||
gpgsm_cert_use_sign_p (KsbaCert cert)
|
||
{
|
||
return cert_usage_p (cert, 0);
|
||
}
|
||
|
||
|
||
/* Return 0 if the cert is usable for encryption */
|
||
int
|
||
gpgsm_cert_use_encrypt_p (KsbaCert cert)
|
||
{
|
||
return cert_usage_p (cert, 1);
|
||
}
|
||
|
||
int
|
||
gpgsm_cert_use_verify_p (KsbaCert cert)
|
||
{
|
||
return cert_usage_p (cert, 2);
|
||
}
|
||
|
||
int
|
||
gpgsm_cert_use_decrypt_p (KsbaCert cert)
|
||
{
|
||
return cert_usage_p (cert, 3);
|
||
}
|
||
|
||
/* add a certificate to a list of certificate and make sure that it is
|
||
a valid certificate */
|
||
int
|
||
gpgsm_add_to_certlist (const char *name, CERTLIST *listaddr)
|
||
{
|
||
int rc;
|
||
KEYDB_SEARCH_DESC desc;
|
||
KEYDB_HANDLE kh = NULL;
|
||
KsbaCert cert = NULL;
|
||
|
||
rc = keydb_classify_name (name, &desc);
|
||
if (!rc)
|
||
{
|
||
kh = keydb_new (0);
|
||
if (!kh)
|
||
rc = GNUPG_Out_Of_Core;
|
||
else
|
||
{
|
||
int wrong_usage = 0;
|
||
get_next:
|
||
rc = keydb_search (kh, &desc, 1);
|
||
if (!rc)
|
||
rc = keydb_get_cert (kh, &cert);
|
||
if (!rc)
|
||
{
|
||
rc = gpgsm_cert_use_encrypt_p (cert);
|
||
if (rc == GNUPG_Wrong_Key_Usage)
|
||
{
|
||
/* There might be another certificate with the
|
||
correct usage, so we better try again */
|
||
wrong_usage = rc;
|
||
ksba_cert_release (cert);
|
||
cert = NULL;
|
||
goto get_next;
|
||
}
|
||
}
|
||
/* we want the error code from the first match in this case */
|
||
if (wrong_usage)
|
||
rc = wrong_usage;
|
||
|
||
if (!rc)
|
||
{
|
||
/* Fixme: If we ever have two certifciates differing
|
||
only in the key usage, we should only bail out here
|
||
if the certificate differes just in the key usage.
|
||
However we need to find some criteria to match the
|
||
identities */
|
||
rc = keydb_search (kh, &desc, 1);
|
||
if (rc == -1)
|
||
rc = 0;
|
||
else if (!rc)
|
||
rc = GNUPG_Ambiguous_Name;
|
||
}
|
||
if (!rc)
|
||
rc = gpgsm_validate_path (cert, NULL);
|
||
if (!rc)
|
||
{
|
||
CERTLIST cl = xtrycalloc (1, sizeof *cl);
|
||
if (!cl)
|
||
rc = GNUPG_Out_Of_Core;
|
||
else
|
||
{
|
||
cl->cert = cert; cert = NULL;
|
||
cl->next = *listaddr;
|
||
*listaddr = cl;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
keydb_release (kh);
|
||
ksba_cert_release (cert);
|
||
return rc == -1? GNUPG_No_Public_Key: rc;
|
||
}
|
||
|
||
void
|
||
gpgsm_release_certlist (CERTLIST list)
|
||
{
|
||
while (list)
|
||
{
|
||
CERTLIST cl = list->next;
|
||
ksba_cert_release (list->cert);
|
||
xfree (list);
|
||
list = cl;
|
||
}
|
||
}
|
||
|
||
|
||
/* Like gpgsm_add_to_certlist, but look only for one certificate. No
|
||
path validation is done */
|
||
int
|
||
gpgsm_find_cert (const char *name, KsbaCert *r_cert)
|
||
{
|
||
int rc;
|
||
KEYDB_SEARCH_DESC desc;
|
||
KEYDB_HANDLE kh = NULL;
|
||
|
||
*r_cert = NULL;
|
||
rc = keydb_classify_name (name, &desc);
|
||
if (!rc)
|
||
{
|
||
kh = keydb_new (0);
|
||
if (!kh)
|
||
rc = GNUPG_Out_Of_Core;
|
||
else
|
||
{
|
||
rc = keydb_search (kh, &desc, 1);
|
||
if (!rc)
|
||
rc = keydb_get_cert (kh, r_cert);
|
||
if (!rc)
|
||
{
|
||
rc = keydb_search (kh, &desc, 1);
|
||
if (rc == -1)
|
||
rc = 0;
|
||
else
|
||
{
|
||
if (!rc)
|
||
rc = GNUPG_Ambiguous_Name;
|
||
ksba_cert_release (*r_cert);
|
||
*r_cert = NULL;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
keydb_release (kh);
|
||
return rc == -1? GNUPG_No_Public_Key: rc;
|
||
}
|
||
|