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41 results

ram-parse.c

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  • 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);