aes-encrypt.c 2.19 KB
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/* aes-encrypt.c
 *
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 * Encryption function for the aes/rijndael block cipher.
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 */

/* nettle, low-level cryptographics library
 *
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 * Copyright (C) 2002, 2013 Niels Möller
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 *  
 * 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
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 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02111-1301, USA.
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 */

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#if HAVE_CONFIG_H
# include "config.h"
#endif
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#include <assert.h>

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#include "aes-internal.h"

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/* 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. */
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void
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aes_encrypt(const struct aes_ctx *ctx,
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	    size_t length, uint8_t *dst,
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	    const uint8_t *src)
{
  assert(!(length % AES_BLOCK_SIZE) );
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  _aes_encrypt(ctx->rounds, ctx->keys, &_aes_encrypt_table,
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	       length, dst, src);
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}
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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);
}
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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);
}
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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);
}