Annotation of src/usr.bin/ssh/hmac.c, Revision 1.4
1.1 markus 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.
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"
1.4 ! deraadt 26: RCSID("$OpenBSD: hmac.c,v 1.3 2000/06/20 01:39:41 markus Exp $");
1.1 markus 27:
28: #include "xmalloc.h"
29: #include "ssh.h"
30: #include "getput.h"
31:
1.2 markus 32: #include <openssl/hmac.h>
1.1 markus 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: }