nettle-internal.h 4.67 KB
Newer Older
Niels Möller's avatar
Niels Möller committed
1 2 3 4 5 6 7 8
/* nettle-internal.h
 *
 * Things that are used only by the testsuite and benchmark, and
 * subject to change.
 */

/* nettle, low-level cryptographics library
 *
Niels Möller's avatar
Niels Möller committed
9
 * Copyright (C) 2002 Niels Möller
Niels Möller's avatar
Niels Möller committed
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
 *  
 * 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.
 */

#ifndef NETTLE_INTERNAL_H_INCLUDED
#define NETTLE_INTERNAL_H_INCLUDED

#include "nettle-meta.h"

32 33 34 35 36 37
/* Temporary allocation, for systems that don't support alloca. Note
 * that the allocation requests should always be reasonably small, so
 * that they can fit on the stack. For non-alloca systems, we use a
 * fix maximum size, and abort if we ever need anything larger. */

#if HAVE_ALLOCA
38 39
# define TMP_DECL(name, type, max) type *name
# define TMP_ALLOC(name, size) (name = alloca(sizeof (*name) * size))
40
#else /* !HAVE_ALLOCA */
41
# define TMP_DECL(name, type, max) type name[max]
42 43 44 45 46 47
# define TMP_ALLOC(name, size) \
do { if (size > (sizeof(name) / sizeof(name[0]))) abort(); } while (0)
#endif 

/* Arbitrary limits which apply to systems that don't have alloca */
#define NETTLE_MAX_BIGNUM_BITS 10000
Niels Möller's avatar
Niels Möller committed
48 49
#define NETTLE_MAX_HASH_BLOCK_SIZE 128
#define NETTLE_MAX_HASH_DIGEST_SIZE 64
50
#define NETTLE_MAX_SEXP_ASSOC 17
51 52
#define NETTLE_MAX_CIPHER_BLOCK_SIZE 32

Niels Möller's avatar
Niels Möller committed
53 54 55 56 57 58 59 60 61
/* Doesn't quite fit with the other algorithms, because of the weak
 * keys. Weak keys are not reported, the functions will simply crash
 * if you try to use a weak key. */

extern const struct nettle_cipher nettle_des;
extern const struct nettle_cipher nettle_des3;

extern const struct nettle_cipher nettle_blowfish128;

62 63 64 65
/* Glue to openssl, for comparative benchmarking. The corresponding
 * code is not included in the nettle library, as that would make the
 * shared library depend on openssl. Instead, look at
 * examples/nettle-openssl.c. */
66 67 68 69
extern const struct nettle_cipher nettle_openssl_aes128;
extern const struct nettle_cipher nettle_openssl_aes192;
extern const struct nettle_cipher nettle_openssl_aes256;
extern const struct nettle_cipher nettle_openssl_arcfour128;
Niels Möller's avatar
Niels Möller committed
70 71 72 73
extern const struct nettle_cipher nettle_openssl_blowfish128;
extern const struct nettle_cipher nettle_openssl_des;
extern const struct nettle_cipher nettle_openssl_cast128;

74 75 76
extern const struct nettle_hash nettle_openssl_md5;
extern const struct nettle_hash nettle_openssl_sha1;

77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110
/* Tentative interface for "authenticated encryption with associated
   data" algorithms. Should be moved to nettle-meta.h when stable. */
struct nettle_aead
{
  const char *name;
  
  unsigned context_size;
  /* Block size of the input, and the size of the output digest */
  unsigned block_size;

  /* Suggested key size; other sizes are sometimes possible. */
  unsigned key_size;

  nettle_set_key_func *set_key;
  nettle_set_key_func *set_iv;
  nettle_hash_update_func *update;
  nettle_crypt_func *encrypt;
  nettle_crypt_func *decrypt;
  nettle_hash_digest_func *digest;
};

#define _NETTLE_AEAD(type, TYPE, name, key_size) {	\
  #type "-" #name #key_size,				\
  sizeof(struct type##_##name##_ctx),			\
  TYPE##_BLOCK_SIZE,					\
  key_size / 8,						\
  (nettle_set_key_func *) type##_##name##_set_key,	\
  (nettle_set_key_func *) type##_##name##_set_iv,	\
  (nettle_hash_update_func *) type##_##name##_update,	\
  (nettle_crypt_func *) type##_##name##_encrypt,	\
  (nettle_crypt_func *) type##_##name##_decrypt,	\
  (nettle_hash_digest_func *) type##_##name##_digest,	\
}

111 112 113
extern const struct nettle_aead nettle_gcm_aes128;
extern const struct nettle_aead nettle_gcm_aes192;
extern const struct nettle_aead nettle_gcm_aes256;
114

115 116 117
extern const struct nettle_aead nettle_gcm_camellia128;
extern const struct nettle_aead nettle_gcm_camellia192;
extern const struct nettle_aead nettle_gcm_camellia256;
118

119 120 121
extern const struct nettle_aead nettle_gcm_serpent128;
extern const struct nettle_aead nettle_gcm_serpent192;
extern const struct nettle_aead nettle_gcm_serpent256;
122

123 124 125
extern const struct nettle_aead nettle_gcm_twofish128;
extern const struct nettle_aead nettle_gcm_twofish192;
extern const struct nettle_aead nettle_gcm_twofish256;
126

Niels Möller's avatar
Niels Möller committed
127
#endif /* NETTLE_INTERNAL_H_INCLUDED */