release/src/router/nettle/nettle-internal.c

   1 /* nettle-internal.c
   2  *
   3  * Things that are used only by the testsuite and benchmark, and
   4  * subject to change.
   5  */
   6
   7 /* nettle, low-level cryptographics library
   8  *
   9  * Copyright (C) 2002 Niels Möller
  10  *
  11  * The nettle library is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU Lesser General Public License as published by
  13  * the Free Software Foundation; either version 2.1 of the License, or (at your
  14  * option) any later version.
  15  *
  16  * The nettle library is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  18  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  19  * License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public License
  22  * along with the nettle library; see the file COPYING.LIB.  If not, write to
  23  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  24  * MA 02111-1301, USA.
  25  */
  26
  27 #if HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <assert.h>
  32 #include <stdlib.h>
  33
  34 #include "nettle-internal.h"
  35 #include "blowfish.h"
  36 #include "des.h"
  37 #include "gcm.h"
  38 #include "salsa20.h"
  39
  40 /* DES uses a different signature for the key set function. We ignore
  41    the return value indicating weak keys. */
  42 static void
  43 des_set_key_hack(void *ctx, unsigned length, const uint8_t *key)
  44 {
  45   assert(length == DES_KEY_SIZE);
  46   des_set_key(ctx, key);
  47 }
  48
  49 static void
  50 des3_set_key_hack(void *ctx, unsigned length, const uint8_t *key)
  51 {
  52   assert(length == DES3_KEY_SIZE);
  53   des3_set_key(ctx, key);
  54 }
  55
  56 /* NOTE: A bit ugly. Ignores weak keys, and pretends the set:key
  57    functions have no return value. */
  58 const struct nettle_cipher
  59 nettle_des = {
  60   "des", sizeof(struct des_ctx),
  61   DES_BLOCK_SIZE, DES_KEY_SIZE,
  62   des_set_key_hack, des_set_key_hack,
  63   (nettle_crypt_func *) des_encrypt,
  64   (nettle_crypt_func *) des_decrypt
  65 };
  66
  67 const struct nettle_cipher
  68 nettle_des3 = {
  69  "des3", sizeof(struct des3_ctx),
  70  DES3_BLOCK_SIZE, DES3_KEY_SIZE,
  71  des3_set_key_hack, des3_set_key_hack,
  72  (nettle_crypt_func *) des3_encrypt,
  73  (nettle_crypt_func *) des3_decrypt
  74 };
  75
  76 /* NOTE: This is not as nice as one might think, as we pretend
  77    blowfish_set_key has no return value. */
  78 const struct nettle_cipher
  79 nettle_blowfish128 = _NETTLE_CIPHER(blowfish, BLOWFISH, 128);
  80
  81 /* Sets a fix zero iv. For benchmarking only. */
  82 static void
  83 salsa20_set_key_hack(void *ctx, unsigned length, const uint8_t *key)
  84 {
  85   static const uint8_t iv[SALSA20_IV_SIZE];
  86   salsa20_set_key (ctx, length, key);
  87   salsa20_set_iv (ctx, iv);
  88 }
  89
  90 /* Claim zero block size, to classify as a stream cipher. */
  91 const struct nettle_cipher
  92 nettle_salsa20 = {
  93   "salsa20", sizeof(struct salsa20_ctx),
  94   0, SALSA20_KEY_SIZE,
  95   salsa20_set_key_hack, salsa20_set_key_hack,
  96   (nettle_crypt_func *) salsa20_crypt,
  97   (nettle_crypt_func *) salsa20_crypt
  98 };
  99
 100 const struct nettle_cipher
 101 nettle_salsa20r12 = {
 102   "salsa20r12", sizeof(struct salsa20_ctx),
 103   0, SALSA20_KEY_SIZE,
 104   salsa20_set_key_hack, salsa20_set_key_hack,
 105   (nettle_crypt_func *) salsa20r12_crypt,
 106   (nettle_crypt_func *) salsa20r12_crypt
 107 };
 108
 109 const struct nettle_aead
 110 nettle_gcm_aes128 = _NETTLE_AEAD(gcm, GCM, aes, 128);
 111 const struct nettle_aead
 112 nettle_gcm_aes192 = _NETTLE_AEAD(gcm, GCM, aes, 192);
 113 const struct nettle_aead
 114 nettle_gcm_aes256 = _NETTLE_AEAD(gcm, GCM, aes, 256);