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1 /* | 1 /* |
2 * aes.h | 2 * aes.h |
3 * | 3 * |
4 * header file for the AES block cipher | 4 * header file for the AES block cipher |
5 * | 5 * |
6 * David A. McGrew | 6 * David A. McGrew |
7 * Cisco Systems, Inc. | 7 * Cisco Systems, Inc. |
8 */ | 8 */ |
9 | 9 |
10 /* | 10 /* |
11 *» | 11 * |
12 * Copyright (c) 2001-2006, Cisco Systems, Inc. | 12 * Copyright (c) 2001-2006, Cisco Systems, Inc. |
13 * All rights reserved. | 13 * All rights reserved. |
14 * | 14 * |
15 * Redistribution and use in source and binary forms, with or without | 15 * Redistribution and use in source and binary forms, with or without |
16 * modification, are permitted provided that the following conditions | 16 * modification, are permitted provided that the following conditions |
17 * are met: | 17 * are met: |
18 * | 18 * |
19 * Redistributions of source code must retain the above copyright | 19 * Redistributions of source code must retain the above copyright |
20 * notice, this list of conditions and the following disclaimer. | 20 * notice, this list of conditions and the following disclaimer. |
21 * | 21 * |
22 * Redistributions in binary form must reproduce the above | 22 * Redistributions in binary form must reproduce the above |
23 * copyright notice, this list of conditions and the following | 23 * copyright notice, this list of conditions and the following |
24 * disclaimer in the documentation and/or other materials provided | 24 * disclaimer in the documentation and/or other materials provided |
25 * with the distribution. | 25 * with the distribution. |
26 * | 26 * |
27 * Neither the name of the Cisco Systems, Inc. nor the names of its | 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 | 28 * contributors may be used to endorse or promote products derived |
29 * from this software without specific prior written permission. | 29 * from this software without specific prior written permission. |
30 * | 30 * |
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
34 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | 34 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
35 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | 35 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
36 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | 36 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
37 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | 37 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
38 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | 38 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | 40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | 41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
42 * OF THE POSSIBILITY OF SUCH DAMAGE. | 42 * OF THE POSSIBILITY OF SUCH DAMAGE. |
43 * | 43 * |
44 */ | 44 */ |
45 | 45 |
46 #ifndef _AES_H | 46 #ifndef _AES_H |
47 #define _AES_H | 47 #define _AES_H |
48 | 48 |
49 #include "datatypes.h" | 49 #include "datatypes.h" |
50 #include "gf2_8.h" | |
51 #include "err.h" | 50 #include "err.h" |
52 | 51 |
| 52 #ifdef __cplusplus |
| 53 extern "C" { |
| 54 #endif |
| 55 |
53 /* aes internals */ | 56 /* aes internals */ |
54 | 57 |
55 typedef struct { | 58 typedef struct { |
56 v128_t round[15]; | 59 v128_t round[15]; |
57 int num_rounds; | 60 int num_rounds; |
58 } aes_expanded_key_t; | 61 } srtp_aes_expanded_key_t; |
59 | 62 |
60 err_status_t | 63 srtp_err_status_t srtp_aes_expand_encryption_key( |
61 aes_expand_encryption_key(const uint8_t *key, | 64 const uint8_t *key, |
62 » » » int key_len, | 65 int key_len, |
63 » » » aes_expanded_key_t *expanded_key); | 66 srtp_aes_expanded_key_t *expanded_key); |
64 | 67 |
65 err_status_t | 68 srtp_err_status_t srtp_aes_expand_decryption_key( |
66 aes_expand_decryption_key(const uint8_t *key, | 69 const uint8_t *key, |
67 » » » int key_len, | 70 int key_len, |
68 » » » aes_expanded_key_t *expanded_key); | 71 srtp_aes_expanded_key_t *expanded_key); |
69 | 72 |
70 void | 73 void srtp_aes_encrypt(v128_t *plaintext, const srtp_aes_expanded_key_t *exp_key)
; |
71 aes_encrypt(v128_t *plaintext, const aes_expanded_key_t *exp_key); | |
72 | 74 |
73 void | 75 void srtp_aes_decrypt(v128_t *plaintext, const srtp_aes_expanded_key_t *exp_key)
; |
74 aes_decrypt(v128_t *plaintext, const aes_expanded_key_t *exp_key); | |
75 | 76 |
76 #if 0 | 77 #ifdef __cplusplus |
77 /* | 78 } |
78 * internal functions | 79 #endif |
79 */ | |
80 | |
81 void | |
82 aes_init_sbox(void); | |
83 | |
84 void | |
85 aes_compute_tables(void); | |
86 #endif | |
87 | 80 |
88 #endif /* _AES_H */ | 81 #endif /* _AES_H */ |
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