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1 /* | |
2 * aes.h | |
3 * | |
4 * header file for the AES block cipher | |
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_H | |
47 #define _AES_H | |
48 | |
49 #include "datatypes.h" | |
50 #include "gf2_8.h" | |
51 #include "err.h" | |
52 | |
53 /* aes internals */ | |
54 | |
55 typedef struct { | |
56 v128_t round[15]; | |
57 int num_rounds; | |
58 } aes_expanded_key_t; | |
59 | |
60 err_status_t | |
61 aes_expand_encryption_key(const uint8_t *key, | |
62 int key_len, | |
63 aes_expanded_key_t *expanded_key); | |
64 | |
65 err_status_t | |
66 aes_expand_decryption_key(const uint8_t *key, | |
67 int key_len, | |
68 aes_expanded_key_t *expanded_key); | |
69 | |
70 void | |
71 aes_encrypt(v128_t *plaintext, const aes_expanded_key_t *exp_key); | |
72 | |
73 void | |
74 aes_decrypt(v128_t *plaintext, const aes_expanded_key_t *exp_key); | |
75 | |
76 #if 0 | |
77 /* | |
78 * internal functions | |
79 */ | |
80 | |
81 void | |
82 aes_init_sbox(void); | |
83 | |
84 void | |
85 aes_compute_tables(void); | |
86 #endif | |
87 | |
88 #endif /* _AES_H */ | |
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