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1 /* | 1 /* |
2 * aes_cbc.h | 2 * aes_cbc.h |
3 * | 3 * |
4 * Header for AES Cipher Blobk Chaining Mode. | 4 * Header for AES Cipher Blobk Chaining Mode. |
5 * | 5 * |
6 * David A. McGrew | 6 * David A. McGrew |
7 * Cisco Systems, Inc. | 7 * Cisco Systems, Inc. |
8 * | 8 * |
9 */ | 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 | 10 |
46 #ifndef AES_CBC_H | 11 #ifndef AES_CBC_H |
47 #define AES_CBC_H | 12 #define AES_CBC_H |
48 | 13 |
49 #include "aes.h" | 14 #include "aes.h" |
50 #include "cipher.h" | 15 #include "cipher.h" |
51 | 16 |
52 typedef struct { | 17 typedef struct { |
53 v128_t state; /* cipher chaining state */ | 18 v128_t state; /* cipher chaining state */ |
54 v128_t previous; /* previous ciphertext block */ | 19 v128_t previous; /* previous ciphertext block */ |
| 20 uint8_t key[32]; |
| 21 int key_len; |
55 aes_expanded_key_t expanded_key; /* the cipher key */ | 22 aes_expanded_key_t expanded_key; /* the cipher key */ |
56 } aes_cbc_ctx_t; | 23 } aes_cbc_ctx_t; |
57 | 24 |
58 err_status_t | 25 err_status_t |
59 aes_cbc_set_key(aes_cbc_ctx_t *c, | 26 aes_cbc_set_key(aes_cbc_ctx_t *c, |
60 const unsigned char *key); | 27 const unsigned char *key); |
61 | 28 |
62 err_status_t | 29 err_status_t |
63 aes_cbc_encrypt(aes_cbc_ctx_t *c, | 30 aes_cbc_encrypt(aes_cbc_ctx_t *c, |
64 unsigned char *buf, | 31 unsigned char *buf, |
65 unsigned int *bytes_in_data); | 32 unsigned int *bytes_in_data); |
66 | 33 |
67 err_status_t | 34 err_status_t |
68 aes_cbc_context_init(aes_cbc_ctx_t *c, const uint8_t *key, | 35 aes_cbc_context_init(aes_cbc_ctx_t *c, const uint8_t *key, |
69 » » int key_len, cipher_direction_t dir); | 36 » » int key_len); |
70 | 37 |
71 err_status_t | 38 err_status_t |
72 aes_cbc_set_iv(aes_cbc_ctx_t *c, void *iv); | 39 aes_cbc_set_iv(aes_cbc_ctx_t *c, void *iv, int direction); |
73 | 40 |
74 err_status_t | 41 err_status_t |
75 aes_cbc_nist_encrypt(aes_cbc_ctx_t *c, | 42 aes_cbc_nist_encrypt(aes_cbc_ctx_t *c, |
76 unsigned char *data, | 43 unsigned char *data, |
77 unsigned int *bytes_in_data); | 44 unsigned int *bytes_in_data); |
78 | 45 |
79 err_status_t | 46 err_status_t |
80 aes_cbc_nist_decrypt(aes_cbc_ctx_t *c, | 47 aes_cbc_nist_decrypt(aes_cbc_ctx_t *c, |
81 unsigned char *data, | 48 unsigned char *data, |
82 unsigned int *bytes_in_data); | 49 unsigned int *bytes_in_data); |
83 | 50 |
84 #endif /* AES_CBC_H */ | 51 #endif /* AES_CBC_H */ |
85 | 52 |
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