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/* ccm-aes256.c
*
* Counter with CBC-MAC mode using AES256 as the underlying cipher.
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2014 Exegin Technologies Limited
* Copyright (C) 2014 Owen Kirby
*
* 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 "aes.h"
#include "ccm.h"
void
ccm_aes256_set_key(struct ccm_aes256_ctx *ctx, const uint8_t *key)
{
aes256_set_encrypt_key(&ctx->cipher, key);
}
void
ccm_aes256_set_nonce(struct ccm_aes256_ctx *ctx,
size_t length, const uint8_t *nonce,
size_t authlen, size_t msglen, size_t taglen)
{
ccm_set_nonce(&ctx->ccm, &ctx->cipher, (nettle_cipher_func *) aes256_encrypt,
length, nonce, authlen, msglen, taglen);
}
void
ccm_aes256_update(struct ccm_aes256_ctx *ctx,
size_t length, const uint8_t *data)
{
ccm_update(&ctx->ccm, &ctx->cipher, (nettle_cipher_func *) aes256_encrypt,
length, data);
}
void
ccm_aes256_encrypt(struct ccm_aes256_ctx *ctx,
size_t length, uint8_t *dst, const uint8_t *src)
{
ccm_encrypt(&ctx->ccm, &ctx->cipher, (nettle_cipher_func *) aes256_encrypt,
length, dst, src);
}
void
ccm_aes256_decrypt(struct ccm_aes256_ctx *ctx,
size_t length, uint8_t *dst, const uint8_t *src)
{
ccm_decrypt(&ctx->ccm, &ctx->cipher, (nettle_cipher_func *) aes256_encrypt,
length, dst, src);
}
void
ccm_aes256_digest(struct ccm_aes256_ctx *ctx,
size_t length, uint8_t *digest)
{
ccm_digest(&ctx->ccm, &ctx->cipher, (nettle_cipher_func *) aes256_encrypt,
length, digest);
}
void
ccm_aes256_encrypt_message(struct ccm_aes256_ctx *ctx,
size_t nlength, const uint8_t *nonce,
size_t alength, const uint8_t *adata,
size_t tlength,
size_t clength, uint8_t *dst, const uint8_t *src)
{
ccm_encrypt_message(&ctx->cipher, (nettle_cipher_func *) aes256_encrypt,
nlength, nonce, alength, adata,
tlength, clength, dst, src);
}
int
ccm_aes256_decrypt_message(struct ccm_aes256_ctx *ctx,
size_t nlength, const uint8_t *nonce,
size_t alength, const uint8_t *adata,
size_t tlength,
size_t clength, uint8_t *dst, const uint8_t *src)
{
return ccm_decrypt_message(&ctx->cipher, (nettle_cipher_func *) aes256_encrypt,
nlength, nonce, alength, adata,
tlength, clength, dst, src);
}
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