nettle-internal.c 2.25 KB
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/* nettle-internal.c
 *
 * Things that are used only by the testsuite and 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.
 */

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#if HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <assert.h>
#include <stdlib.h>

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#include "nettle-internal.h"
#include "des.h"
#include "blowfish.h"

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/* DES uses a different signature for the key set function. We ignore
   the return value incicating weak keys. */
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static void
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des_set_key_hack(void *ctx, unsigned length, const uint8_t *key)
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{
  assert(length == DES_KEY_SIZE);
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  des_set_key(ctx, key);
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}

static void
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des3_set_key_hack(void *ctx, unsigned length, const uint8_t *key)
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{
  assert(length == DES3_KEY_SIZE);
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  des3_set_key(ctx, key);
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}

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/* NOTE: A bit ugly. Ignores weak keys, and pretends the set:key
   functions have no return value. */
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const struct nettle_cipher
nettle_des = {
  "des", sizeof(struct des_ctx),
  DES_BLOCK_SIZE, DES_KEY_SIZE,
  des_set_key_hack, des_set_key_hack,
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  (nettle_crypt_func *) des_encrypt,
  (nettle_crypt_func *) des_decrypt
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};

const struct nettle_cipher
nettle_des3 = {
 "des3", sizeof(struct des3_ctx),
 DES3_BLOCK_SIZE, DES3_KEY_SIZE,
 des3_set_key_hack, des3_set_key_hack,
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 (nettle_crypt_func *) des3_encrypt,
 (nettle_crypt_func *) des3_decrypt
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};

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/* NOTE: This is not as nice as one might think, as we pretend
   blowfish_set_key has no return value. */
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const struct nettle_cipher
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nettle_blowfish128 = _NETTLE_CIPHER(blowfish, BLOWFISH, 128);