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  • nettle-openssl.c 4.50 KiB
    /* nettle-openssl.c
     *
     * Glue that's used only by the benchmark, and subject to change.
     */
    
    /* 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 /* HAVE_CONFIG_H */
    
    /* Openssl glue, for comparative benchmarking only */
    
    #if HAVE_LIBCRYPTO
    
    #include "nettle-internal.h"
    
    #include <openssl/blowfish.h>
    #include <openssl/des.h>
    #include <openssl/cast.h>
    
    #include <assert.h>
    
    
    /* Blowfish */
    static void
    openssl_bf_set_key(void *ctx, unsigned length, const uint8_t *key)
    {
      BF_set_key(ctx, length, key);
    }
    
    
    static void
    openssl_bf_encrypt(void *ctx, unsigned length,
    		   uint8_t *dst, const uint8_t *src)
    {
      assert (!(length % BF_BLOCK));
      while (length)
        {
          BF_ecb_encrypt(src, dst, ctx, BF_ENCRYPT);
          length -= BF_BLOCK;
          dst += BF_BLOCK;
          src += BF_BLOCK;
        }
    }
    
    static void
    openssl_bf_decrypt(void *ctx, unsigned length,
    		   uint8_t *dst, const uint8_t *src)
    {
      assert (!(length % BF_BLOCK));
      while (length)
        {
          BF_ecb_encrypt(src, dst, ctx, BF_DECRYPT);
          length -= BF_BLOCK;
          dst += BF_BLOCK;
          src += BF_BLOCK;
        }
    }
    
    const struct nettle_cipher
    nettle_openssl_blowfish128 = {
      "openssl bf128", sizeof(BF_KEY),
      /* Claim no block size, so that the benchmark doesn't try CBC mode
       * (as openssl cipher + nettle cbc is somewhat pointless to
       * benchmark). */
      0, 16,
      openssl_bf_set_key, openssl_bf_set_key,
      openssl_bf_encrypt, openssl_bf_decrypt
    };
    
    
    /* DES */
    static void
    openssl_des_set_key(void *ctx, unsigned length, const uint8_t *key)
    {
      assert(length == 8);
      des_key_sched((char *) key, ctx);
    }
    
    #define DES_BLOCK_SIZE 8
    
    static void
    openssl_des_encrypt(void *ctx, unsigned length,
    		    uint8_t *dst, const uint8_t *src)
    {
      assert (!(length % DES_BLOCK_SIZE));
      while (length)
        {
          des_ecb_encrypt((char *) src, (char *) dst, ctx, DES_ENCRYPT);
          length -= DES_BLOCK_SIZE;
          dst += DES_BLOCK_SIZE;
          src += DES_BLOCK_SIZE;
        }
    }
    
    static void
    openssl_des_decrypt(void *ctx, unsigned length,
    		    uint8_t *dst, const uint8_t *src)
    {
      assert (!(length % DES_BLOCK_SIZE));
      while (length)
        {
          des_ecb_encrypt((char *) src, (char *) dst, ctx, DES_DECRYPT);
          length -= DES_BLOCK_SIZE;
          dst += DES_BLOCK_SIZE;
          src += DES_BLOCK_SIZE;
        }
    }
    
    const struct nettle_cipher
    nettle_openssl_des = {
      "openssl des", sizeof(des_key_schedule),
      /* Claim no block size, so that the benchmark doesn't try CBC mode
       * (as openssl cipher + nettle cbc is somewhat pointless to
       * benchmark). */
      0, 8,
      openssl_des_set_key, openssl_des_set_key,
      openssl_des_encrypt, openssl_des_decrypt
    };
    
    
    /* Cast128 */
    static void
    openssl_cast_set_key(void *ctx, unsigned length, const uint8_t *key)
    {
      CAST_set_key(ctx, length, key);
    }
    
    static void
    openssl_cast_encrypt(void *ctx, unsigned length,
    		     uint8_t *dst, const uint8_t *src)
    {
      assert (!(length % CAST_BLOCK));
      while (length)
        {
          CAST_ecb_encrypt(src, dst, ctx, CAST_ENCRYPT);
          length -= CAST_BLOCK;
          dst += CAST_BLOCK;
          src += CAST_BLOCK;
        }
    }
    
    static void
    openssl_cast_decrypt(void *ctx, unsigned length,
    		     uint8_t *dst, const uint8_t *src)
    {
      assert (!(length % CAST_BLOCK));
      while (length)
        {
          CAST_ecb_encrypt(src, dst, ctx, CAST_DECRYPT);
          length -= CAST_BLOCK;
          dst += CAST_BLOCK;
          src += CAST_BLOCK;
        }
    }
    
    const struct nettle_cipher
    nettle_openssl_cast128 = {
      "openssl cast128", sizeof(CAST_KEY),
      /* Claim no block size, so that the benchmark doesn't try CBC mode
       * (as openssl cipher + nettle cbc is somewhat pointless to
       * benchmark). */
      0, CAST_KEY_LENGTH,
      openssl_cast_set_key, openssl_cast_set_key,
      openssl_cast_encrypt, openssl_cast_decrypt
    };
    
    #endif /* HAVE_LIBCRYPTO */