michael@0: /*
michael@0:  * aes.h
michael@0:  *
michael@0:  * header file for the AES block cipher
michael@0:  *
michael@0:  * David A. McGrew
michael@0:  * Cisco Systems, Inc.
michael@0:  */
michael@0: 
michael@0: /*
michael@0:  *	
michael@0:  * Copyright (c) 2001-2006, Cisco Systems, Inc.
michael@0:  * All rights reserved.
michael@0:  * 
michael@0:  * Redistribution and use in source and binary forms, with or without
michael@0:  * modification, are permitted provided that the following conditions
michael@0:  * are met:
michael@0:  * 
michael@0:  *   Redistributions of source code must retain the above copyright
michael@0:  *   notice, this list of conditions and the following disclaimer.
michael@0:  * 
michael@0:  *   Redistributions in binary form must reproduce the above
michael@0:  *   copyright notice, this list of conditions and the following
michael@0:  *   disclaimer in the documentation and/or other materials provided
michael@0:  *   with the distribution.
michael@0:  * 
michael@0:  *   Neither the name of the Cisco Systems, Inc. nor the names of its
michael@0:  *   contributors may be used to endorse or promote products derived
michael@0:  *   from this software without specific prior written permission.
michael@0:  * 
michael@0:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
michael@0:  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
michael@0:  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
michael@0:  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
michael@0:  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
michael@0:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
michael@0:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
michael@0:  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
michael@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
michael@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
michael@0:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
michael@0:  * OF THE POSSIBILITY OF SUCH DAMAGE.
michael@0:  *
michael@0:  */
michael@0: 
michael@0: #ifndef _AES_H
michael@0: #define _AES_H
michael@0: 
michael@0: #include "config.h"
michael@0: 
michael@0: #include "datatypes.h"
michael@0: #include "gf2_8.h"
michael@0: #include "err.h"
michael@0: 
michael@0: /* aes internals */
michael@0: 
michael@0: typedef struct {
michael@0:   v128_t round[15];
michael@0:   int num_rounds;
michael@0: } aes_expanded_key_t;
michael@0: 
michael@0: err_status_t
michael@0: aes_expand_encryption_key(const uint8_t *key,
michael@0: 			  int key_len,
michael@0: 			  aes_expanded_key_t *expanded_key);
michael@0: 
michael@0: err_status_t
michael@0: aes_expand_decryption_key(const uint8_t *key,
michael@0: 			  int key_len,
michael@0: 			  aes_expanded_key_t *expanded_key);
michael@0: 
michael@0: void
michael@0: aes_encrypt(v128_t *plaintext, const aes_expanded_key_t *exp_key);
michael@0: 
michael@0: void
michael@0: aes_decrypt(v128_t *plaintext, const aes_expanded_key_t *exp_key);
michael@0: 
michael@0: #if 0
michael@0: /*
michael@0:  * internal functions 
michael@0:  */
michael@0: 
michael@0: void
michael@0: aes_init_sbox(void);
michael@0: 
michael@0: void
michael@0: aes_compute_tables(void);
michael@0: #endif 
michael@0: 
michael@0: #endif /* _AES_H */