mirror of
git://git.gnupg.org/gnupg.git
synced 2024-12-22 10:19:57 +01:00
71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
/* dsa.c
|
|
* Copyright (C) 1998 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 <assert.h>
|
|
|
|
#include "options.h"
|
|
#include "packet.h"
|
|
#include "errors.h"
|
|
#include "iobuf.h"
|
|
#include "keydb.h"
|
|
#include "memory.h"
|
|
#include "util.h"
|
|
#include "main.h"
|
|
|
|
|
|
void
|
|
g10_dsa_sign( PKT_secret_cert *skc, PKT_signature *sig,
|
|
MD_HANDLE md, int digest_algo )
|
|
{
|
|
MPI frame;
|
|
byte *dp;
|
|
|
|
assert( sig->pubkey_algo == PUBKEY_ALGO_DSA );
|
|
if( !digest_algo )
|
|
digest_algo = md_get_algo(md);
|
|
|
|
dp = md_read( md, digest_algo );
|
|
keyid_from_skc( skc, sig->keyid );
|
|
sig->digest_algo = digest_algo;
|
|
sig->digest_start[0] = dp[0];
|
|
sig->digest_start[1] = dp[1];
|
|
sig->d.dsa.r = mpi_alloc( mpi_get_nlimbs(skc->d.dsa.p) );
|
|
sig->d.dsa.s = mpi_alloc( mpi_get_nlimbs(skc->d.dsa.p) );
|
|
frame = mpi_alloc( (md_digest_length(digest_algo)+BYTES_PER_MPI_LIMB-1)
|
|
/ BYTES_PER_MPI_LIMB );
|
|
mpi_set_buffer( frame, md_read(md, digest_algo),
|
|
md_digest_length(digest_algo), 0 );
|
|
if( DBG_CIPHER )
|
|
log_mpidump("used sig frame: ", frame);
|
|
dsa_sign( sig->d.dsa.r, sig->d.dsa.s, frame, &skc->d.dsa );
|
|
mpi_free(frame);
|
|
if( opt.verbose ) {
|
|
char *ustr = get_user_id_string( sig->keyid );
|
|
log_info("DSA signature from: %s\n", ustr );
|
|
m_free(ustr);
|
|
}
|
|
}
|
|
|