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1 /* | |
2 * hmac.h | |
3 * | |
4 * interface to hmac auth_type_t | |
5 * | |
6 * David A. McGrew | |
7 * Cisco Systems, Inc. | |
8 * | |
9 */ | |
10 /* | |
11 * | |
12 * Copyright (c) 2001-2006,2013, 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 HMAC_H | |
47 #define HMAC_H | |
48 | |
49 #include "auth.h" | |
50 #include "sha1.h" | |
51 | |
52 typedef struct { | |
53 uint8_t opad[64]; | |
54 sha1_ctx_t ctx; | |
55 sha1_ctx_t init_ctx; | |
56 #ifdef OPENSSL | |
57 int ctx_initialized; | |
58 int init_ctx_initialized; | |
59 #endif | |
60 } hmac_ctx_t; | |
61 | |
62 err_status_t | |
63 hmac_alloc(auth_t **a, int key_len, int out_len); | |
64 | |
65 err_status_t | |
66 hmac_dealloc(auth_t *a); | |
67 | |
68 err_status_t | |
69 hmac_init(hmac_ctx_t *state, const uint8_t *key, int key_len); | |
70 | |
71 err_status_t | |
72 hmac_start(hmac_ctx_t *state); | |
73 | |
74 err_status_t | |
75 hmac_update(hmac_ctx_t *state, const uint8_t *message, int msg_octets); | |
76 | |
77 err_status_t | |
78 hmac_compute(hmac_ctx_t *state, const void *message, | |
79 int msg_octets, int tag_len, uint8_t *result); | |
80 | |
81 | |
82 #endif /* HMAC_H */ | |
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