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4f8c6159 | 1 | /* |
2 | * Copyright (c) 2000 Markus Friedl. All rights reserved. | |
3 | * | |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions | |
6 | * are met: | |
7 | * 1. Redistributions of source code must retain the above copyright | |
8 | * notice, this list of conditions and the following disclaimer. | |
9 | * 2. Redistributions in binary form must reproduce the above copyright | |
10 | * notice, this list of conditions and the following disclaimer in the | |
11 | * documentation and/or other materials provided with the distribution. | |
4f8c6159 | 12 | * |
13 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
15 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
16 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
17 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
18 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
19 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
20 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
21 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
22 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
23 | */ | |
24 | ||
25 | #include "includes.h" | |
5ca51e19 | 26 | RCSID("$OpenBSD: hmac.c,v 1.7 2001/02/08 19:30:51 itojun Exp $"); |
4f8c6159 | 27 | |
28 | #include "xmalloc.h" | |
4f8c6159 | 29 | #include "getput.h" |
42f11eb2 | 30 | #include "log.h" |
4f8c6159 | 31 | |
32 | #include <openssl/hmac.h> | |
33 | ||
5ca51e19 | 34 | #include "hmac.h" |
35 | ||
1e3b8b07 | 36 | u_char * |
4f8c6159 | 37 | hmac( |
38 | EVP_MD *evp_md, | |
1e3b8b07 | 39 | u_int seqno, |
40 | u_char *data, int datalen, | |
41 | u_char *key, int keylen) | |
4f8c6159 | 42 | { |
43 | HMAC_CTX c; | |
1e3b8b07 | 44 | static u_char m[EVP_MAX_MD_SIZE]; |
45 | u_char b[4]; | |
4f8c6159 | 46 | |
47 | if (key == NULL) | |
48 | fatal("hmac: no key"); | |
49 | HMAC_Init(&c, key, keylen, evp_md); | |
50 | PUT_32BIT(b, seqno); | |
51 | HMAC_Update(&c, b, sizeof b); | |
52 | HMAC_Update(&c, data, datalen); | |
53 | HMAC_Final(&c, m, NULL); | |
54 | HMAC_cleanup(&c); | |
55 | return(m); | |
56 | } |