/* ====================================================================

 * Copyright (c) 2001 The OpenSSL Project.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer. 

 *

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in

 *    the documentation and/or other materials provided with the

 *    distribution.

 *

 * 3. All advertising materials mentioning features or use of this

 *    software must display the following acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"

 *

 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to

 *    endorse or promote products derived from this software without

 *    prior written permission. For written permission, please contact

 *    openssl-core@openssl.org.

 *

 * 5. Products derived from this software may not be called "OpenSSL"

 *    nor may "OpenSSL" appear in their names without prior written

 *    permission of the OpenSSL Project.

 *

 * 6. Redistributions of any form whatsoever must retain the following

 *    acknowledgment:

 *    "This product includes software developed by the OpenSSL Project

 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"

 *

 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY

 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR

 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

 * OF THE POSSIBILITY OF SUCH DAMAGE.

 * ====================================================================

 *

 */

#include <openssl/opensslconf.h>

#ifndef OPENSSL_NO_AES

#include <openssl/evp.h>

#include <openssl/err.h>

#include <string.h>

#include <assert.h>

#include <openssl/aes.h>

#include "evp_locl.h"

static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,

					const unsigned char *iv, int enc);

typedef struct

	{

	AES_KEY ks;

	} EVP_AES_KEY;

#define data(ctx)	EVP_C_DATA(EVP_AES_KEY,ctx)

IMPLEMENT_BLOCK_CIPHER(aes_128, ks, AES, EVP_AES_KEY,

		       NID_aes_128, 16, 16, 16, 128,

		       0, aes_init_key, NULL, 

		       EVP_CIPHER_set_asn1_iv,

		       EVP_CIPHER_get_asn1_iv,

		       NULL)

IMPLEMENT_BLOCK_CIPHER(aes_192, ks, AES, EVP_AES_KEY,

		       NID_aes_192, 16, 24, 16, 128,

		       0, aes_init_key, NULL, 

		       EVP_CIPHER_set_asn1_iv,

		       EVP_CIPHER_get_asn1_iv,

		       NULL)

IMPLEMENT_BLOCK_CIPHER(aes_256, ks, AES, EVP_AES_KEY,

		       NID_aes_256, 16, 32, 16, 128,

		       0, aes_init_key, NULL, 

		       EVP_CIPHER_set_asn1_iv,

		       EVP_CIPHER_get_asn1_iv,

		       NULL)

#define IMPLEMENT_AES_CFBR(ksize,cbits)	IMPLEMENT_CFBR(aes,AES,EVP_AES_KEY,ks,ksize,cbits,16)

IMPLEMENT_AES_CFBR(128,1)

IMPLEMENT_AES_CFBR(192,1)

IMPLEMENT_AES_CFBR(256,1)

IMPLEMENT_AES_CFBR(128,8)

IMPLEMENT_AES_CFBR(192,8)

IMPLEMENT_AES_CFBR(256,8)

static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,

		   const unsigned char *iv, int enc)

	{

	int ret;

	if ((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CFB_MODE

	    || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_OFB_MODE

	    || enc) 

		ret=AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data);

	else

		ret=AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data);

	if(ret < 0)

		{

		EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);

		return 0;

		}

	return 1;

	}

#endif