sl@0: /* ====================================================================
sl@0:  * Copyright (c) 2001 The OpenSSL Project.  All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  *
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer. 
sl@0:  *
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in
sl@0:  *    the documentation and/or other materials provided with the
sl@0:  *    distribution.
sl@0:  *
sl@0:  * 3. All advertising materials mentioning features or use of this
sl@0:  *    software must display the following acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
sl@0:  *
sl@0:  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
sl@0:  *    endorse or promote products derived from this software without
sl@0:  *    prior written permission. For written permission, please contact
sl@0:  *    openssl-core@openssl.org.
sl@0:  *
sl@0:  * 5. Products derived from this software may not be called "OpenSSL"
sl@0:  *    nor may "OpenSSL" appear in their names without prior written
sl@0:  *    permission of the OpenSSL Project.
sl@0:  *
sl@0:  * 6. Redistributions of any form whatsoever must retain the following
sl@0:  *    acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
sl@0:  *
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
sl@0:  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sl@0:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
sl@0:  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
sl@0:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
sl@0:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
sl@0:  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
sl@0:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
sl@0:  * OF THE POSSIBILITY OF SUCH DAMAGE.
sl@0:  * ====================================================================
sl@0:  *
sl@0:  */
sl@0: 
sl@0: #include <openssl/opensslconf.h>
sl@0: #ifndef OPENSSL_NO_AES
sl@0: #include <openssl/evp.h>
sl@0: #include <openssl/err.h>
sl@0: #include <string.h>
sl@0: #include <assert.h>
sl@0: #include <openssl/aes.h>
sl@0: #include "evp_locl.h"
sl@0: 
sl@0: static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
sl@0: 					const unsigned char *iv, int enc);
sl@0: 
sl@0: typedef struct
sl@0: 	{
sl@0: 	AES_KEY ks;
sl@0: 	} EVP_AES_KEY;
sl@0: 
sl@0: #define data(ctx)	EVP_C_DATA(EVP_AES_KEY,ctx)
sl@0: 
sl@0: IMPLEMENT_BLOCK_CIPHER(aes_128, ks, AES, EVP_AES_KEY,
sl@0: 		       NID_aes_128, 16, 16, 16, 128,
sl@0: 		       0, aes_init_key, NULL, 
sl@0: 		       EVP_CIPHER_set_asn1_iv,
sl@0: 		       EVP_CIPHER_get_asn1_iv,
sl@0: 		       NULL)
sl@0: IMPLEMENT_BLOCK_CIPHER(aes_192, ks, AES, EVP_AES_KEY,
sl@0: 		       NID_aes_192, 16, 24, 16, 128,
sl@0: 		       0, aes_init_key, NULL, 
sl@0: 		       EVP_CIPHER_set_asn1_iv,
sl@0: 		       EVP_CIPHER_get_asn1_iv,
sl@0: 		       NULL)
sl@0: IMPLEMENT_BLOCK_CIPHER(aes_256, ks, AES, EVP_AES_KEY,
sl@0: 		       NID_aes_256, 16, 32, 16, 128,
sl@0: 		       0, aes_init_key, NULL, 
sl@0: 		       EVP_CIPHER_set_asn1_iv,
sl@0: 		       EVP_CIPHER_get_asn1_iv,
sl@0: 		       NULL)
sl@0: 
sl@0: #define IMPLEMENT_AES_CFBR(ksize,cbits)	IMPLEMENT_CFBR(aes,AES,EVP_AES_KEY,ks,ksize,cbits,16)
sl@0: 
sl@0: IMPLEMENT_AES_CFBR(128,1)
sl@0: IMPLEMENT_AES_CFBR(192,1)
sl@0: IMPLEMENT_AES_CFBR(256,1)
sl@0: 
sl@0: IMPLEMENT_AES_CFBR(128,8)
sl@0: IMPLEMENT_AES_CFBR(192,8)
sl@0: IMPLEMENT_AES_CFBR(256,8)
sl@0: 
sl@0: static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
sl@0: 		   const unsigned char *iv, int enc)
sl@0: 	{
sl@0: 	int ret;
sl@0: 
sl@0: 	if ((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CFB_MODE
sl@0: 	    || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_OFB_MODE
sl@0: 	    || enc) 
sl@0: 		ret=AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
sl@0: 	else
sl@0: 		ret=AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
sl@0: 
sl@0: 	if(ret < 0)
sl@0: 		{
sl@0: 		EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
sl@0: 		return 0;
sl@0: 		}
sl@0: 
sl@0: 	return 1;
sl@0: 	}
sl@0: 
sl@0: #endif