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Make gpg not depend on the RIPE-MD160 implementaion in Libgcrypt.

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Fix SIG_ID computation.
This commit is contained in:
Werner Koch 2008-12-11 17:44:52 +00:00
parent c3752d1057
commit 6558568912
10 changed files with 190 additions and 44 deletions
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2
NEWS
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@ -19,6 +19,8 @@ Noteworthy changes in version 2.0.10 (unreleased)
* [gpg] New control statement %ask-passphrase for the unattended key
generation.
* [gpg] The algorithm to compute the SIG_ID status has been changed.
* [gpgsm] Now uses AES by default.
* [gpgsm] Made --output option work with --export-secret-key-p12.

20
g10/ChangeLog
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@ -1,3 +1,23 @@
2008-12-11 Werner Koch <wk@g10code.com>
* sig-check.c (signature_check2): Change algorithm used to compute
the SIG_ID.
(check_revocation_keys): Close message digest.
* rmd160.c, rmd160.h: New. Based on code from GnuPG-1.4.
* t-rmd160.c: New.
* Makefile.am: Add support to run tests.
* keyid.c (namehash_from_uid): Use rmd160_hash_buffer.
2008-12-10 Werner Koch <wk@g10code.com>
* trustdb.h (NAMEHASH_HASH): Remove unsued constant.
* gpg.c (print_mds): Print RMD160 only is enabled.
* keygen.c (keygen_set_std_prefs): Include RMD160 only if
available.
2008-12-09 Werner Koch <wk@g10code.com>
* gpg.c (main) [IS_DEVELOPMENT_VERSION]: Fix strusage use.

9
g10/Makefile.am
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@ -30,6 +30,8 @@ AM_CFLAGS = $(LIBGCRYPT_CFLAGS) $(LIBASSUAN_CFLAGS) $(GPG_ERROR_CFLAGS)
needed_libs = $(libcommon) ../jnlib/libjnlib.a ../gl/libgnu.a
bin_PROGRAMS = gpg2 gpgv2
noinst_PROGRAMS = $(module_tests)
TESTS = $(module_tests)
if ENABLE_BZIP2_SUPPORT
bzip2_source = compress-bz2.c
@ -57,6 +59,7 @@ common_source = \
textfilter.c \
progress.c \
misc.c \
rmd160.c \
options.h \
openfile.c \
keyid.c \
@ -121,6 +124,12 @@ gpg2_LDADD = $(LDADD) $(LIBGCRYPT_LIBS) $(LIBASSUAN_LIBS) $(GPG_ERROR_LIBS) \
gpgv2_LDADD = $(LDADD) $(LIBGCRYPT_LIBS) $(LIBASSUAN_LIBS) $(GPG_ERROR_LIBS) \
$(LIBICONV)
t_common_ldadd =
module_tests = t-rmd160
t_rmd160_SOURCES = t-rmd160.c rmd160.c
t_rmd160_LDADD = $(t_common_ldadd)
$(PROGRAMS): $(needed_libs) ../common/libgpgrl.a
install-data-local:

6
g10/gpg.c
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@ -4187,7 +4187,8 @@ print_mds( const char *fname, int algo )
else {
print_hashline( md, GCRY_MD_MD5, fname );
print_hashline( md, GCRY_MD_SHA1, fname );
print_hashline( md, GCRY_MD_RMD160, fname );
if (!gcry_md_test_algo (GCRY_MD_RMD160))
print_hashline( md, GCRY_MD_RMD160, fname );
if (!gcry_md_test_algo (GCRY_MD_SHA224))
print_hashline (md, GCRY_MD_SHA224, fname);
if (!gcry_md_test_algo (GCRY_MD_SHA256))
@ -4204,7 +4205,8 @@ print_mds( const char *fname, int algo )
else {
print_hex( md, GCRY_MD_MD5, fname );
print_hex( md, GCRY_MD_SHA1, fname );
print_hex( md, GCRY_MD_RMD160, fname );
if (!gcry_md_test_algo (GCRY_MD_RMD160))
print_hex( md, GCRY_MD_RMD160, fname );
if (!gcry_md_test_algo (GCRY_MD_SHA224))
print_hex (md, GCRY_MD_SHA224, fname);
if (!gcry_md_test_algo (GCRY_MD_SHA256))

3
g10/keygen.c
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@ -352,7 +352,8 @@ keygen_set_std_prefs (const char *string,int personal)
strcat(dummy_string,"H8 ");
/* RIPEMD160 */
strcat(dummy_string,"H3 ");
if (!openpgp_md_test_algo(DIGEST_ALGO_RMD160))
strcat(dummy_string,"H3 ");
/* ZLIB */
strcat(dummy_string,"Z2 ");

13
g10/keyid.c
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@ -33,6 +33,7 @@
#include "options.h"
#include "keydb.h"
#include "i18n.h"
#include "rmd160.h"
int
pubkey_letter( int algo )
@ -448,16 +449,14 @@ keyid_from_sig( PKT_signature *sig, u32 *keyid )
byte *
namehash_from_uid(PKT_user_id *uid)
{
if(uid->namehash==NULL)
if (!uid->namehash)
{
uid->namehash = xmalloc(20);
uid->namehash = xmalloc (20);
if(uid->attrib_data)
gcry_md_hash_buffer (GCRY_MD_RMD160, uid->namehash,
uid->attrib_data, uid->attrib_len);
rmd160_hash_buffer (uid->namehash, uid->attrib_data, uid->attrib_len);
else
gcry_md_hash_buffer (GCRY_MD_RMD160, uid->namehash,
uid->name, uid->len);
rmd160_hash_buffer (uid->namehash, uid->name, uid->len);
}
return uid->namehash;

1
g10/main.h
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@ -328,7 +328,6 @@ void pause_on_sigusr( int which );
void block_all_signals(void);
void unblock_all_signals(void);
/*-- server.c --*/
int gpg_server (ctrl_t);

87
g10/sig-check.c
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@ -130,41 +130,63 @@ signature_check2 (PKT_signature *sig, gcry_md_hd_t digest, u32 *r_expiredate,
* and the timestamp, but the drawback of this is, that it is
* not possible to sign more than one identical document within
* one second. Some remote batch processing applications might
* like this feature here */
gcry_md_hd_t md;
* like this feature here.
*
* Note that before 2.0.10, we used RIPE-MD160 for the hash
* and accidently didn't include the timestamp and algorithm
* information in the hash. Given that this feature is not
* commonly used and that a replay attacks detection should
* not solely be based on this feature (because it does not
* work with RSA), we take the freedom and switch to SHA-1
* with 2.0.10 to take advantage of hardware supported SHA-1
* implementations. We also include the missing information
* in the hash. Note also the SIG_ID as computed by gpg 1.x
* and gpg 2.x didn't matched either because 2.x used to print
* MPIs not in PGP format. */
u32 a = sig->timestamp;
int i, nsig = pubkey_get_nsig( sig->pubkey_algo );
byte *p, *buffer;
int nsig = pubkey_get_nsig( sig->pubkey_algo );
unsigned char *p, *buffer;
size_t n, nbytes;
int i;
char hashbuf[20];
if (gcry_md_open (&md, GCRY_MD_RMD160, 0))
BUG ();
/* FIXME: Why the hell are we updating DIGEST here??? */
gcry_md_putc( digest, sig->pubkey_algo );
gcry_md_putc( digest, sig->digest_algo );
gcry_md_putc( digest, (a >> 24) & 0xff );
gcry_md_putc( digest, (a >> 16) & 0xff );
gcry_md_putc( digest, (a >> 8) & 0xff );
gcry_md_putc( digest, a & 0xff );
for(i=0; i < nsig; i++ ) {
size_t n;
unsigned char *tmp;
if (gcry_mpi_aprint (GCRYMPI_FMT_USG, &tmp, &n, sig->data[i]))
nbytes = 6;
for (i=0; i < nsig; i++ )
{
if (gcry_mpi_print (GCRYMPI_FMT_USG, NULL, 0, &n, sig->data[i]))
BUG();
gcry_md_write (md, tmp, n);
xfree (tmp);
}
gcry_md_final (md);
p = make_radix64_string ( gcry_md_read( md, 0 ), 20 );
buffer = xmalloc( strlen(p) + 60 );
sprintf( buffer, "%s %s %lu",
p, strtimestamp( sig->timestamp ), (ulong)sig->timestamp );
write_status_text( STATUS_SIG_ID, buffer );
xfree(buffer);
xfree(p);
gcry_md_close(md);
nbytes += n;
}
/* Make buffer large enough to be later used as output buffer. */
if (nbytes < 100)
nbytes = 100;
nbytes += 10; /* Safety margin. */
/* Fill and hash buffer. */
buffer = p = xmalloc (nbytes);
*p++ = sig->pubkey_algo;
*p++ = sig->digest_algo;
*p++ = (a >> 24) & 0xff;
*p++ = (a >> 16) & 0xff;
*p++ = (a >> 8) & 0xff;
*p++ = a & 0xff;
nbytes -= 6;
for (i=0; i < nsig; i++ )
{
if (gcry_mpi_print (GCRYMPI_FMT_PGP, p, nbytes, &n, sig->data[i]))
BUG();
p += n;
nbytes -= n;
}
gcry_md_hash_buffer (GCRY_MD_SHA1, hashbuf, buffer, p-buffer);
p = make_radix64_string (hashbuf, 20);
sprintf (buffer, "%s %s %lu",
p, strtimestamp (sig->timestamp), (ulong)sig->timestamp);
xfree (p);
write_status_text (STATUS_SIG_ID, buffer);
xfree (buffer);
}
return rc;
@ -420,6 +442,7 @@ check_revocation_keys(PKT_public_key *pk,PKT_signature *sig)
hash_public_key(md,pk);
rc=signature_check(sig,md);
cache_sig_result(sig,rc);
gcry_md_close (md);
break;
}
}

92
g10/t-rmd160.c Normal file
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@ -0,0 +1,92 @@
/* t-rmd160.c - Module test for rmd160.c
* Copyright (C) 2008 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 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 <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "rmd160.h"
#define pass() do { ; } while(0)
#define fail(a) do { fprintf (stderr, "%s:%d: test %d failed\n",\
__FILE__,__LINE__, (a)); \
exit (1); \
} while(0)
static void
run_test (void)
{
static struct
{
const char *data;
const char *expect;
} testtbl[] =
{
{ "",
"\x9c\x11\x85\xa5\xc5\xe9\xfc\x54\x61\x28"
"\x08\x97\x7e\xe8\xf5\x48\xb2\x25\x8d\x31" },
{ "a",
"\x0b\xdc\x9d\x2d\x25\x6b\x3e\xe9\xda\xae"
"\x34\x7b\xe6\xf4\xdc\x83\x5a\x46\x7f\xfe" },
{ "abc",
"\x8e\xb2\x08\xf7\xe0\x5d\x98\x7a\x9b\x04"
"\x4a\x8e\x98\xc6\xb0\x87\xf1\x5a\x0b\xfc" },
{ "message digest",
"\x5d\x06\x89\xef\x49\xd2\xfa\xe5\x72\xb8"
"\x81\xb1\x23\xa8\x5f\xfa\x21\x59\x5f\x36" },
{ "abcdefghijklmnopqrstuvwxyz",
"\xf7\x1c\x27\x10\x9c\x69\x2c\x1b\x56\xbb"
"\xdc\xeb\x5b\x9d\x28\x65\xb3\x70\x8d\xbc" },
{ "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789",
"\xb0\xe2\x0b\x6e\x31\x16\x64\x02\x86\xed"
"\x3a\x87\xa5\x71\x30\x79\xb2\x1f\x51\x89" },
{ "1234567890" "1234567890" "1234567890" "1234567890"
"1234567890" "1234567890" "1234567890" "1234567890",
"\x9b\x75\x2e\x45\x57\x3d\x4b\x39\xf4\xdb"
"\xd3\x32\x3c\xab\x82\xbf\x63\x32\x6b\xfb" },
{ NULL, NULL }
};
int idx;
char digest[20];
for (idx=0; testtbl[idx].data; idx++)
{
rmd160_hash_buffer (digest,
testtbl[idx].data, strlen(testtbl[idx].data));
if (memcmp (digest, testtbl[idx].expect, 20))
fail (idx);
}
}
int
main (int argc, char **argv)
{
(void)argc;
(void)argv;
run_test ();
return 0;
}

1
g10/trustdb.h
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@ -36,7 +36,6 @@
#define TRUST_FLAG_DISABLED 128 /* d: key/uid disabled */
#define TRUST_FLAG_PENDING_CHECK 256 /* a check-trustdb is pending */
#define NAMEHASH_HASH DIGEST_ALGO_RMD160
#define NAMEHASH_LEN 20
/*-- trustdb.c --*/