1/*
2 * aes_cbc.h
3 *
4 * Header for AES Cipher Blobk Chaining Mode.
5 *
6 * David A. McGrew
7 * Cisco Systems, Inc.
8 *
9 */
10/*
11 *
12 * Copyright (c) 2001-2006, Cisco Systems, Inc.
13 * All rights reserved.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 *
19 *   Redistributions of source code must retain the above copyright
20 *   notice, this list of conditions and the following disclaimer.
21 *
22 *   Redistributions in binary form must reproduce the above
23 *   copyright notice, this list of conditions and the following
24 *   disclaimer in the documentation and/or other materials provided
25 *   with the distribution.
26 *
27 *   Neither the name of the Cisco Systems, Inc. nor the names of its
28 *   contributors may be used to endorse or promote products derived
29 *   from this software without specific prior written permission.
30 *
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
34 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
35 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
36 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
37 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
38 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
42 * OF THE POSSIBILITY OF SUCH DAMAGE.
43 *
44 */
45
46#ifndef AES_CBC_H
47#define AES_CBC_H
48
49#include "aes.h"
50#include "cipher.h"
51
52typedef struct {
53  v128_t   state;                  /* cipher chaining state            */
54  v128_t   previous;               /* previous ciphertext block        */
55  aes_expanded_key_t expanded_key; /* the cipher key                   */
56} aes_cbc_ctx_t;
57
58err_status_t
59aes_cbc_set_key(aes_cbc_ctx_t *c,
60		const unsigned char *key);
61
62err_status_t
63aes_cbc_encrypt(aes_cbc_ctx_t *c,
64		unsigned char *buf,
65		unsigned int  *bytes_in_data);
66
67err_status_t
68aes_cbc_context_init(aes_cbc_ctx_t *c, const uint8_t *key,
69		     int key_len, cipher_direction_t dir);
70
71err_status_t
72aes_cbc_set_iv(aes_cbc_ctx_t *c, void *iv);
73
74err_status_t
75aes_cbc_nist_encrypt(aes_cbc_ctx_t *c,
76		     unsigned char *data,
77		     unsigned int *bytes_in_data);
78
79err_status_t
80aes_cbc_nist_decrypt(aes_cbc_ctx_t *c,
81		     unsigned char *data,
82		     unsigned int *bytes_in_data);
83
84#endif /* AES_CBC_H */
85
86