aes-encrypt.c

/* aes-encrypt.c
 *
 * Encryption function for the aes/rijndael block cipher.
 */

/* nettle, low-level cryptographics library
 *
 * Copyright (C) 2002, 2013 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 "aes-internal.h"

/* The main point on this function is to help the assembler
   implementations of _nettle_aes_encrypt to get the table pointer.
   For PIC code, the details can be complex and system dependent. */
void
aes_encrypt(const struct aes_ctx *ctx,
	    size_t length, uint8_t *dst,
	    const uint8_t *src)
{
  assert(!(length % AES_BLOCK_SIZE) );
  _aes_encrypt(ctx->rounds, ctx->keys, &_aes_encrypt_table,
	       length, dst, src);
}

void
aes128_encrypt(const struct aes128_ctx *ctx,
	       size_t length, uint8_t *dst,
	       const uint8_t *src)
{
  assert(!(length % AES_BLOCK_SIZE) );
  _aes_encrypt(_AES128_ROUNDS, ctx->keys, &_aes_encrypt_table,
	       length, dst, src);
}

void
aes192_encrypt(const struct aes192_ctx *ctx,
	       size_t length, uint8_t *dst,
	       const uint8_t *src)
{
  assert(!(length % AES_BLOCK_SIZE) );
  _aes_encrypt(_AES192_ROUNDS, ctx->keys, &_aes_encrypt_table,
	       length, dst, src);
}

void
aes256_encrypt(const struct aes256_ctx *ctx,
	       size_t length, uint8_t *dst,
	       const uint8_t *src)
{
  assert(!(length % AES_BLOCK_SIZE) );
  _aes_encrypt(_AES256_ROUNDS, ctx->keys, &_aes_encrypt_table,
	       length, dst, src);
}