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/* rsa.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_rsa_encrypt( PKT_public_cert *pkc, PKT_pubkey_enc *enc, DEK *dek )
{
#ifdef HAVE_RSA_CIPHER
assert( enc->pubkey_algo == PUBKEY_ALGO_RSA );
keyid_from_pkc( pkc, enc->keyid );
enc->d.rsa.rsa_integer = encode_session_key( dek,
mpi_get_nbits(pkc->d.rsa.rsa_n) );
if( DBG_CIPHER )
log_mpidump("Plain DEK frame: ", enc->d.rsa.rsa_integer);
rsa_public( enc->d.rsa.rsa_integer, enc->d.rsa.rsa_integer, &pkc->d.rsa);
if( DBG_CIPHER )
log_mpidump("Encry DEK frame: ", enc->d.rsa.rsa_integer);
if( opt.verbose ) {
char *ustr = get_user_id_string( enc->keyid );
log_info("RSA encrypted for: %s\n", ustr );
m_free(ustr);
}
#else
BUG();
#endif/* ! HAVE_RSA_CIPHER*/
}
void
g10_rsa_sign( PKT_secret_cert *skc, PKT_signature *sig,
MD_HANDLE md, int digest_algo )
{
#ifdef HAVE_RSA_CIPHER
byte *dp;
assert( sig->pubkey_algo == PUBKEY_ALGO_RSA );
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.rsa.rsa_integer =
encode_md_value( md, mpi_get_nbits(skc->d.rsa.rsa_n));
rsa_secret( sig->d.rsa.rsa_integer, sig->d.rsa.rsa_integer, &skc->d.rsa );
if( opt.verbose ) {
char *ustr = get_user_id_string( sig->keyid );
log_info("RSA signature from: %s\n", ustr );
m_free(ustr);
}
#else
BUG();
#endif/* ! HAVE_RSA_CIPHER*/
}
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