michael@0: /*
michael@0:  * aes_icm.h
michael@0:  *
michael@0:  * Header for AES Integer Counter Mode.
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_ICM_H
michael@0: #define AES_ICM_H
michael@0: 
michael@0: #include "aes.h"
michael@0: #include "cipher.h"
michael@0: 
michael@0: typedef struct {
michael@0:   v128_t   counter;                /* holds the counter value          */
michael@0:   v128_t   offset;                 /* initial offset value             */
michael@0:   v128_t   keystream_buffer;       /* buffers bytes of keystream       */
michael@0:   aes_expanded_key_t expanded_key; /* the cipher key                   */
michael@0:   int      bytes_in_buffer;        /* number of unused bytes in buffer */
michael@0: } aes_icm_ctx_t;
michael@0: 
michael@0: 
michael@0: err_status_t
michael@0: aes_icm_context_init(aes_icm_ctx_t *c,
michael@0: 		     const unsigned char *key,
michael@0: 		     int key_len); 
michael@0: 
michael@0: err_status_t
michael@0: aes_icm_set_iv(aes_icm_ctx_t *c, void *iv);
michael@0: 
michael@0: err_status_t
michael@0: aes_icm_encrypt(aes_icm_ctx_t *c,
michael@0: 		unsigned char *buf, unsigned int *bytes_to_encr);
michael@0: 
michael@0: err_status_t
michael@0: aes_icm_output(aes_icm_ctx_t *c,
michael@0: 	       unsigned char *buf, int bytes_to_output);
michael@0: 
michael@0: err_status_t 
michael@0: aes_icm_dealloc(cipher_t *c);
michael@0:  
michael@0: err_status_t 
michael@0: aes_icm_encrypt_ismacryp(aes_icm_ctx_t *c, 
michael@0: 			 unsigned char *buf, 
michael@0: 			 unsigned int *enc_len, 
michael@0: 			 int forIsmacryp);
michael@0:  
michael@0: err_status_t 
michael@0: aes_icm_alloc_ismacryp(cipher_t **c, 
michael@0: 		       int key_len, 
michael@0: 		       int forIsmacryp);
michael@0: 
michael@0: #endif /* AES_ICM_H */
michael@0: