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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, 2014 Niels Möller
*
* 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., 51 Franklin Street, Fifth Floor, Boston,
* MA 02111-1301, USA.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <assert.h>
#include <stdlib.h>
#include "nettle-internal.h"
#include "blowfish.h"
#include "des.h"
#include "eax.h"
#include "gcm.h"
#include "chacha.h"
#include "salsa20.h"
/* NOTE: A bit ugly. Ignores weak keys, and pretends the set_key
functions have no return value. */
const struct nettle_cipher
nettle_des = {
"des", sizeof(struct des_ctx),
DES_BLOCK_SIZE, DES_KEY_SIZE,
(nettle_set_key_func *) des_set_key,
(nettle_set_key_func *) des_set_key,
(nettle_crypt_func *) des_encrypt,
(nettle_crypt_func *) des_decrypt
};
const struct nettle_cipher
nettle_des3 = {
"des3", sizeof(struct des3_ctx),
DES3_BLOCK_SIZE, DES3_KEY_SIZE,
(nettle_set_key_func *) des3_set_key,
(nettle_set_key_func *) des3_set_key,
(nettle_crypt_func *) des3_encrypt,
(nettle_crypt_func *) des3_decrypt
};
/* NOTE: This is not as nice as one might think, as we pretend
blowfish_set_key has no return value. */
const struct nettle_cipher
nettle_blowfish128 =
{ "blowfish128", sizeof(struct blowfish_ctx),
BLOWFISH_BLOCK_SIZE, BLOWFISH128_KEY_SIZE,
(nettle_set_key_func *) blowfish128_set_key,
(nettle_set_key_func *) blowfish128_set_key,
(nettle_crypt_func *) blowfish_encrypt,
(nettle_crypt_func *) blowfish_decrypt
};
/* Sets a fix zero iv. For benchmarking only. */
static void
chacha_set_key_hack(void *ctx, const uint8_t *key)
{
static const uint8_t iv[CHACHA_IV_SIZE];
chacha256_set_key (ctx, key);
chacha_set_iv (ctx, iv);
}
/* Claim zero block size, to classify as a stream cipher. */
const struct nettle_cipher
nettle_chacha = {
"chacha", sizeof(struct chacha_ctx),
0, CHACHA256_KEY_SIZE,
chacha_set_key_hack, chacha_set_key_hack,
(nettle_crypt_func *) chacha_crypt,
(nettle_crypt_func *) chacha_crypt
};
/* Sets a fix zero iv. For benchmarking only. */
static void
salsa20_set_key_hack(void *ctx, const uint8_t *key)
{
static const uint8_t iv[SALSA20_IV_SIZE];
salsa20_256_set_key (ctx, key);
salsa20_set_iv (ctx, iv);
}
/* Claim zero block size, to classify as a stream cipher. */
const struct nettle_cipher
nettle_salsa20 = {
"salsa20", sizeof(struct salsa20_ctx),
0, SALSA20_256_KEY_SIZE,
salsa20_set_key_hack, salsa20_set_key_hack,
(nettle_crypt_func *) salsa20_crypt,
(nettle_crypt_func *) salsa20_crypt
};
const struct nettle_cipher
nettle_salsa20r12 = {
"salsa20r12", sizeof(struct salsa20_ctx),
0, SALSA20_256_KEY_SIZE,
salsa20_set_key_hack, salsa20_set_key_hack,
(nettle_crypt_func *) salsa20r12_crypt,
(nettle_crypt_func *) salsa20r12_crypt
};
#define gcm_aes128_set_nonce gcm_aes128_set_iv
#define gcm_aes192_set_nonce gcm_aes192_set_iv
#define gcm_aes256_set_nonce gcm_aes256_set_iv
const struct nettle_aead
nettle_gcm_aes128 = _NETTLE_AEAD(gcm, GCM, aes128, 128);
const struct nettle_aead
nettle_gcm_aes192 = _NETTLE_AEAD(gcm, GCM, aes192, 192);
const struct nettle_aead
nettle_gcm_aes256 = _NETTLE_AEAD(gcm, GCM, aes256, 256);
/* eax-aes128 */
void
eax_aes128_set_key(struct eax_aes128_ctx *ctx, const uint8_t *key)
{
EAX_SET_KEY(ctx,
aes128_set_encrypt_key, aes128_encrypt,
key);
}
void
eax_aes128_set_nonce(struct eax_aes128_ctx *ctx,
size_t length, const uint8_t *iv)
{
EAX_SET_NONCE(ctx, aes128_encrypt, length, iv);
}
void
eax_aes128_update(struct eax_aes128_ctx *ctx, size_t length, const uint8_t *data)
{
EAX_UPDATE(ctx, aes128_encrypt, length, data);
}
void
eax_aes128_encrypt(struct eax_aes128_ctx *ctx,
size_t length, uint8_t *dst, const uint8_t *src)
{
EAX_ENCRYPT(ctx, aes128_encrypt, length, dst, src);
}
void
eax_aes128_decrypt(struct eax_aes128_ctx *ctx,
size_t length, uint8_t *dst, const uint8_t *src)
{
EAX_DECRYPT(ctx, aes128_encrypt, length, dst, src);
}
void
eax_aes128_digest(struct eax_aes128_ctx *ctx,
size_t length, uint8_t *digest)
{
EAX_DIGEST(ctx, aes128_encrypt, length, digest);
}
const struct nettle_aead
nettle_eax_aes128 = _NETTLE_AEAD(eax, EAX, aes128, 128);
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