diff options
Diffstat (limited to 'hmac.c')
| -rw-r--r-- | hmac.c | 59 |
1 files changed, 59 insertions, 0 deletions
@@ -0,0 +1,59 @@ +/* + * Copyright (c) 2000 Markus Friedl. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Markus Friedl. + * 4. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "includes.h" +RCSID("$Id: hmac.c,v 1.2 2000/04/12 09:39:10 markus Exp $"); + +#include "xmalloc.h" +#include "ssh.h" +#include "getput.h" + +#include <openssl/hmac.h> + +unsigned char * +hmac( + EVP_MD *evp_md, + unsigned int seqno, + unsigned char *data, int datalen, + unsigned char *key, int keylen) +{ + HMAC_CTX c; + static unsigned char m[EVP_MAX_MD_SIZE]; + unsigned char b[4]; + + if (key == NULL) + fatal("hmac: no key"); + HMAC_Init(&c, key, keylen, evp_md); + PUT_32BIT(b, seqno); + HMAC_Update(&c, b, sizeof b); + HMAC_Update(&c, data, datalen); + HMAC_Final(&c, m, NULL); + HMAC_cleanup(&c); + return(m); +} |