mirror of
git://git.gnupg.org/gnupg.git
synced 2024-12-22 10:19:57 +01:00
131 lines
3.5 KiB
C
131 lines
3.5 KiB
C
/* certpath.c - path validation
|
|
* 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"
|
|
|
|
int
|
|
gpgsm_validate_path (KsbaCert cert)
|
|
{
|
|
int rc = 0, depth = 0;
|
|
char *issuer = NULL;
|
|
char *subject = NULL;
|
|
KEYDB_HANDLE kh = keydb_new (0);
|
|
KsbaCert subject_cert = NULL, issuer_cert = NULL;
|
|
|
|
if (!kh)
|
|
{
|
|
log_error (_("failed to allocated keyDB handle\n"));
|
|
rc = GPGSM_General_Error;
|
|
goto leave;
|
|
}
|
|
|
|
gpgsm_dump_cert ("subject", cert);
|
|
|
|
subject_cert = cert;
|
|
|
|
for (;;)
|
|
{
|
|
xfree (issuer);
|
|
xfree (subject);
|
|
issuer = ksba_cert_get_issuer (subject_cert);
|
|
subject = ksba_cert_get_subject (subject_cert);
|
|
|
|
if (!issuer)
|
|
{
|
|
if (DBG_X509)
|
|
log_debug ("ERROR: issuer missing\n");
|
|
rc = GPGSM_Bad_Certificate;
|
|
goto leave;
|
|
}
|
|
|
|
if (subject && !strcmp (issuer, subject))
|
|
{
|
|
if (gpgsm_check_cert_sig (subject_cert, subject_cert) )
|
|
{
|
|
log_debug ("selfsigned certificate has a BAD signatures\n");
|
|
rc = depth? GPGSM_Bad_Certificate_Path : GPGSM_Bad_Certificate;
|
|
goto leave;
|
|
}
|
|
log_debug ("selfsigned certificate is good\n");
|
|
break; /* okay, a self-signed certicate is an end-point */
|
|
}
|
|
|
|
depth++;
|
|
/* fixme: check against a maximum path length */
|
|
|
|
/* find the next cert up the tree */
|
|
keydb_search_reset (kh);
|
|
rc = keydb_search_subject (kh, issuer);
|
|
if (rc)
|
|
{
|
|
log_debug ("failed to find issuer's certificate: rc=%d\n", rc);
|
|
rc = GPGSM_Missing_Certificate;
|
|
goto leave;
|
|
}
|
|
|
|
ksba_cert_release (issuer_cert); issuer_cert = NULL;
|
|
rc = keydb_get_cert (kh, &issuer_cert);
|
|
if (rc)
|
|
{
|
|
log_debug ("failed to get cert: rc=%d\n", rc);
|
|
rc = GPGSM_General_Error;
|
|
goto leave;
|
|
}
|
|
|
|
log_debug ("got issuer's certificate:\n");
|
|
gpgsm_dump_cert ("issuer", issuer_cert);
|
|
|
|
if (gpgsm_check_cert_sig (issuer_cert, subject_cert) )
|
|
{
|
|
log_debug ("certificate has a BAD signatures\n");
|
|
rc = GPGSM_Bad_Certificate_Path;
|
|
goto leave;
|
|
}
|
|
log_debug ("certificate is good\n");
|
|
|
|
keydb_search_reset (kh);
|
|
subject_cert = issuer_cert;
|
|
issuer_cert = NULL;
|
|
}
|
|
|
|
leave:
|
|
xfree (issuer);
|
|
keydb_release (kh);
|
|
ksba_cert_release (issuer_cert);
|
|
if (subject_cert != cert)
|
|
ksba_cert_release (subject_cert);
|
|
return rc;
|
|
}
|
|
|