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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" | |
bcbf86ec | 26 | RCSID("$OpenBSD: hmac.c,v 1.4 2000/09/07 20:27:51 deraadt Exp $"); |
4f8c6159 | 27 | |
28 | #include "xmalloc.h" | |
29 | #include "ssh.h" | |
30 | #include "getput.h" | |
31 | ||
32 | #include <openssl/hmac.h> | |
33 | ||
34 | unsigned char * | |
35 | hmac( | |
36 | EVP_MD *evp_md, | |
37 | unsigned int seqno, | |
38 | unsigned char *data, int datalen, | |
39 | unsigned char *key, int keylen) | |
40 | { | |
41 | HMAC_CTX c; | |
42 | static unsigned char m[EVP_MAX_MD_SIZE]; | |
43 | unsigned char b[4]; | |
44 | ||
45 | if (key == NULL) | |
46 | fatal("hmac: no key"); | |
47 | HMAC_Init(&c, key, keylen, evp_md); | |
48 | PUT_32BIT(b, seqno); | |
49 | HMAC_Update(&c, b, sizeof b); | |
50 | HMAC_Update(&c, data, datalen); | |
51 | HMAC_Final(&c, m, NULL); | |
52 | HMAC_cleanup(&c); | |
53 | return(m); | |
54 | } |