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ram-parse.c
rsa-decrypt.c 5.31 KiB
/* rsa-decrypt.c
*
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2002 Niels Mller
*
* The nettle library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The nettle library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the nettle library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
/* string.h must be included before gmp.h */
#include "aes.h"
#include "bignum.h"
#include "buffer.h"
#include "cbc.h"
#include "hmac.h"
#include "macros.h"
#include "rsa.h"
#include "yarrow.h"
#include "io.h"
#include "rsa-session.h"
#include "getopt.h"
void
rsa_session_set_decrypt_key(struct rsa_session *ctx,
const struct rsa_session_info *key)
{
const uint8_t *aes_key = SESSION_AES_KEY(key);
const uint8_t *iv = SESSION_IV(key);
const uint8_t *hmac_key = SESSION_HMAC_KEY(key);
aes_set_decrypt_key(&ctx->aes.ctx, AES_KEY_SIZE, aes_key);
CBC_SET_IV(&ctx->aes, iv);
hmac_sha1_set_key(&ctx->hmac, SHA1_DIGEST_SIZE, hmac_key);
}
static int
read_uint32(FILE *f, uint32_t *n)
{
uint8_t buf[4];
if (fread(buf, 1, sizeof(buf), f) != sizeof(buf))
return 0;
*n = READ_UINT32(buf);