| Damien Miller | a664e87 | 2000-04-16 11:52:47 +1000 | [diff] [blame] | 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 | * 3. All advertising materials mentioning features or use of this software |
| 13 | * must display the following acknowledgement: |
| 14 | * This product includes software developed by Markus Friedl. |
| 15 | * 4. The name of the author may not be used to endorse or promote products |
| 16 | * derived from this software without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | #include "includes.h" |
| Damien Miller | 6536c7d | 2000-06-22 21:32:31 +1000 | [diff] [blame] | 31 | RCSID("$OpenBSD: hmac.c,v 1.3 2000/06/20 01:39:41 markus Exp $"); |
| Damien Miller | a664e87 | 2000-04-16 11:52:47 +1000 | [diff] [blame] | 32 | |
| 33 | #include "xmalloc.h" |
| 34 | #include "ssh.h" |
| 35 | #include "getput.h" |
| 36 | |
| 37 | #include <openssl/hmac.h> |
| 38 | |
| 39 | unsigned char * |
| 40 | hmac( |
| 41 | EVP_MD *evp_md, |
| 42 | unsigned int seqno, |
| 43 | unsigned char *data, int datalen, |
| 44 | unsigned char *key, int keylen) |
| 45 | { |
| 46 | HMAC_CTX c; |
| 47 | static unsigned char m[EVP_MAX_MD_SIZE]; |
| 48 | unsigned char b[4]; |
| 49 | |
| 50 | if (key == NULL) |
| 51 | fatal("hmac: no key"); |
| 52 | HMAC_Init(&c, key, keylen, evp_md); |
| 53 | PUT_32BIT(b, seqno); |
| 54 | HMAC_Update(&c, b, sizeof b); |
| 55 | HMAC_Update(&c, data, datalen); |
| 56 | HMAC_Final(&c, m, NULL); |
| 57 | HMAC_cleanup(&c); |
| 58 | return(m); |
| 59 | } |