blob: 48a176304bebe15f71a116506238653d9e76f312 [file] [log] [blame]
Damien Millera664e872000-04-16 11:52:47 +10001/*
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.
Damien Millera664e872000-04-16 11:52:47 +100012 *
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"
Damien Millere4340be2000-09-16 13:29:08 +110026RCSID("$OpenBSD: hmac.c,v 1.4 2000/09/07 20:27:51 deraadt Exp $");
Damien Millera664e872000-04-16 11:52:47 +100027
28#include "xmalloc.h"
29#include "ssh.h"
30#include "getput.h"
31
32#include <openssl/hmac.h>
33
34unsigned char *
35hmac(
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}