mirror of
git://git.gnupg.org/gnupg.git
synced 2025-07-02 22:46:30 +02:00
This commit was manufactured by cvs2svn to create branch
'GNUPG-1-9-BRANCH'.
This commit is contained in:
Repo Admin
parent
8d76177f10
commit
82a17c9fb3
563 changed files with 0 additions and 267875 deletions
301
sm/certcheck.c
301
sm/certcheck.c
|
|
@ -1,301 +0,0 @@
|
|||
/* certcheck.c - check one certificate
|
||||
* 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"
|
||||
|
||||
|
||||
static int
|
||||
do_encode_md (GCRY_MD_HD md, int algo, unsigned int nbits,
|
||||
GCRY_MPI *r_val)
|
||||
{
|
||||
int nframe = (nbits+7) / 8;
|
||||
byte *frame;
|
||||
int i, n;
|
||||
byte asn[100];
|
||||
size_t asnlen;
|
||||
size_t len;
|
||||
|
||||
asnlen = DIM(asn);
|
||||
if (gcry_md_algo_info (algo, GCRYCTL_GET_ASNOID, asn, &asnlen))
|
||||
{
|
||||
log_error ("No object identifier for algo %d\n", algo);
|
||||
return GNUPG_Internal_Error;
|
||||
}
|
||||
|
||||
len = gcry_md_get_algo_dlen (algo);
|
||||
|
||||
if ( len + asnlen + 4 > nframe )
|
||||
{
|
||||
log_error ("can't encode a %d bit MD into a %d bits frame\n",
|
||||
(int)(len*8), (int)nbits);
|
||||
return GNUPG_Internal_Error;
|
||||
}
|
||||
|
||||
/* We encode the MD in this way:
|
||||
*
|
||||
* 0 A PAD(n bytes) 0 ASN(asnlen bytes) MD(len bytes)
|
||||
*
|
||||
* PAD consists of FF bytes.
|
||||
*/
|
||||
frame = xtrymalloc (nframe);
|
||||
if (!frame)
|
||||
return GNUPG_Out_Of_Core;
|
||||
n = 0;
|
||||
frame[n++] = 0;
|
||||
frame[n++] = 1; /* block type */
|
||||
i = nframe - len - asnlen -3 ;
|
||||
assert ( i > 1 );
|
||||
memset ( frame+n, 0xff, i ); n += i;
|
||||
frame[n++] = 0;
|
||||
memcpy ( frame+n, asn, asnlen ); n += asnlen;
|
||||
memcpy ( frame+n, gcry_md_read(md, algo), len ); n += len;
|
||||
assert ( n == nframe );
|
||||
if (DBG_X509)
|
||||
{
|
||||
int j;
|
||||
log_debug ("encoded hash:");
|
||||
for (j=0; j < nframe; j++)
|
||||
log_printf (" %02X", frame[j]);
|
||||
log_printf ("\n");
|
||||
}
|
||||
|
||||
gcry_mpi_scan (r_val, GCRYMPI_FMT_USG, frame, &nframe);
|
||||
xfree (frame);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
Check the signature on CERT using the ISSUER-CERT. This function
|
||||
does only test the cryptographic signature and nothing else. It is
|
||||
assumed that the ISSUER_CERT is valid. */
|
||||
int
|
||||
gpgsm_check_cert_sig (KsbaCert issuer_cert, KsbaCert cert)
|
||||
{
|
||||
const char *algoid;
|
||||
GCRY_MD_HD md;
|
||||
int rc, algo;
|
||||
GCRY_MPI frame;
|
||||
KsbaSexp p;
|
||||
size_t n;
|
||||
GCRY_SEXP s_sig, s_hash, s_pkey;
|
||||
|
||||
algo = gcry_md_map_name ( (algoid=ksba_cert_get_digest_algo (cert)));
|
||||
if (!algo)
|
||||
{
|
||||
log_error ("unknown hash algorithm `%s'\n", algoid? algoid:"?");
|
||||
return GNUPG_General_Error;
|
||||
}
|
||||
md = gcry_md_open (algo, 0);
|
||||
if (!md)
|
||||
{
|
||||
log_error ("md_open failed: %s\n", gcry_strerror (-1));
|
||||
return GNUPG_General_Error;
|
||||
}
|
||||
if (DBG_HASHING)
|
||||
gcry_md_start_debug (md, "hash.cert");
|
||||
|
||||
rc = ksba_cert_hash (cert, 1, HASH_FNC, md);
|
||||
if (rc)
|
||||
{
|
||||
log_error ("ksba_cert_hash failed: %s\n", ksba_strerror (rc));
|
||||
gcry_md_close (md);
|
||||
return map_ksba_err (rc);
|
||||
}
|
||||
gcry_md_final (md);
|
||||
|
||||
p = ksba_cert_get_sig_val (cert);
|
||||
n = gcry_sexp_canon_len (p, 0, NULL, NULL);
|
||||
if (!n)
|
||||
{
|
||||
log_error ("libksba did not return a proper S-Exp\n");
|
||||
gcry_md_close (md);
|
||||
ksba_free (p);
|
||||
return GNUPG_Bug;
|
||||
}
|
||||
if (DBG_X509)
|
||||
{
|
||||
int j;
|
||||
log_debug ("signature value:");
|
||||
for (j=0; j < n; j++)
|
||||
log_printf (" %02X", p[j]);
|
||||
log_printf ("\n");
|
||||
}
|
||||
|
||||
rc = gcry_sexp_sscan ( &s_sig, NULL, p, n);
|
||||
ksba_free (p);
|
||||
if (rc)
|
||||
{
|
||||
log_error ("gcry_sexp_scan failed: %s\n", gcry_strerror (rc));
|
||||
gcry_md_close (md);
|
||||
return map_gcry_err (rc);
|
||||
}
|
||||
|
||||
p = ksba_cert_get_public_key (issuer_cert);
|
||||
n = gcry_sexp_canon_len (p, 0, NULL, NULL);
|
||||
if (!n)
|
||||
{
|
||||
log_error ("libksba did not return a proper S-Exp\n");
|
||||
gcry_md_close (md);
|
||||
ksba_free (p);
|
||||
gcry_sexp_release (s_sig);
|
||||
return GNUPG_Bug;
|
||||
}
|
||||
rc = gcry_sexp_sscan ( &s_pkey, NULL, p, n);
|
||||
ksba_free (p);
|
||||
if (rc)
|
||||
{
|
||||
log_error ("gcry_sexp_scan failed: %s\n", gcry_strerror (rc));
|
||||
gcry_md_close (md);
|
||||
gcry_sexp_release (s_sig);
|
||||
return map_gcry_err (rc);
|
||||
}
|
||||
|
||||
rc = do_encode_md (md, algo, gcry_pk_get_nbits (s_pkey), &frame);
|
||||
if (rc)
|
||||
{
|
||||
gcry_md_close (md);
|
||||
gcry_sexp_release (s_sig);
|
||||
gcry_sexp_release (s_pkey);
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* put hash into the S-Exp s_hash */
|
||||
if ( gcry_sexp_build (&s_hash, NULL, "%m", frame) )
|
||||
BUG ();
|
||||
gcry_mpi_release (frame);
|
||||
|
||||
|
||||
rc = gcry_pk_verify (s_sig, s_hash, s_pkey);
|
||||
if (DBG_CRYPTO)
|
||||
log_debug ("gcry_pk_verify: %s\n", gcry_strerror (rc));
|
||||
gcry_md_close (md);
|
||||
gcry_sexp_release (s_sig);
|
||||
gcry_sexp_release (s_hash);
|
||||
gcry_sexp_release (s_pkey);
|
||||
return map_gcry_err (rc);
|
||||
}
|
||||
|
||||
|
||||
|
||||
int
|
||||
gpgsm_check_cms_signature (KsbaCert cert, KsbaConstSexp sigval,
|
||||
GCRY_MD_HD md, int algo)
|
||||
{
|
||||
int rc;
|
||||
KsbaSexp p;
|
||||
GCRY_MPI frame;
|
||||
GCRY_SEXP s_sig, s_hash, s_pkey;
|
||||
size_t n;
|
||||
|
||||
n = gcry_sexp_canon_len (sigval, 0, NULL, NULL);
|
||||
if (!n)
|
||||
{
|
||||
log_error ("libksba did not return a proper S-Exp\n");
|
||||
return GNUPG_Bug;
|
||||
}
|
||||
rc = gcry_sexp_sscan (&s_sig, NULL, sigval, n);
|
||||
if (rc)
|
||||
{
|
||||
log_error ("gcry_sexp_scan failed: %s\n", gcry_strerror (rc));
|
||||
return map_gcry_err (rc);
|
||||
}
|
||||
|
||||
p = ksba_cert_get_public_key (cert);
|
||||
n = gcry_sexp_canon_len (p, 0, NULL, NULL);
|
||||
if (!n)
|
||||
{
|
||||
log_error ("libksba did not return a proper S-Exp\n");
|
||||
ksba_free (p);
|
||||
gcry_sexp_release (s_sig);
|
||||
return GNUPG_Bug;
|
||||
}
|
||||
if (DBG_X509)
|
||||
log_printhex ("public key: ", p, n);
|
||||
|
||||
rc = gcry_sexp_sscan ( &s_pkey, NULL, p, n);
|
||||
ksba_free (p);
|
||||
if (rc)
|
||||
{
|
||||
log_error ("gcry_sexp_scan failed: %s\n", gcry_strerror (rc));
|
||||
gcry_sexp_release (s_sig);
|
||||
return map_gcry_err (rc);
|
||||
}
|
||||
|
||||
|
||||
rc = do_encode_md (md, algo, gcry_pk_get_nbits (s_pkey), &frame);
|
||||
if (rc)
|
||||
{
|
||||
gcry_sexp_release (s_sig);
|
||||
gcry_sexp_release (s_pkey);
|
||||
return rc;
|
||||
}
|
||||
/* put hash into the S-Exp s_hash */
|
||||
if ( gcry_sexp_build (&s_hash, NULL, "%m", frame) )
|
||||
BUG ();
|
||||
gcry_mpi_release (frame);
|
||||
|
||||
|
||||
rc = gcry_pk_verify (s_sig, s_hash, s_pkey);
|
||||
if (DBG_CRYPTO)
|
||||
log_debug ("gcry_pk_verify: %s\n", gcry_strerror (rc));
|
||||
gcry_sexp_release (s_sig);
|
||||
gcry_sexp_release (s_hash);
|
||||
gcry_sexp_release (s_sig);
|
||||
return map_gcry_err (rc);
|
||||
}
|
||||
|
||||
|
||||
|
||||
int
|
||||
gpgsm_create_cms_signature (KsbaCert cert, GCRY_MD_HD md, int mdalgo,
|
||||
char **r_sigval)
|
||||
{
|
||||
int rc;
|
||||
char *grip;
|
||||
size_t siglen;
|
||||
|
||||
grip = gpgsm_get_keygrip_hexstring (cert);
|
||||
if (!grip)
|
||||
return seterr (Bad_Certificate);
|
||||
|
||||
rc = gpgsm_agent_pksign (grip, gcry_md_read(md, mdalgo),
|
||||
gcry_md_get_algo_dlen (mdalgo), mdalgo,
|
||||
r_sigval, &siglen);
|
||||
xfree (grip);
|
||||
return rc;
|
||||
}
|
||||
|
||||
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue