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/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* 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. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``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 PROJECT OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
/*
* Based on sample code appeared on RFC2104.
*/
#include <sys/types.h>
#include <sys/cdefs.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <crypto/md5.h>
#include <crypto/hmac_md5.h>
void
hmac_md5(src0, srclen, key0, keylen, digest)
caddr_t src0;
size_t srclen;
caddr_t key0;
size_t keylen;
caddr_t digest;
{
u_int8_t *src;
u_int8_t *key;
u_int8_t tk[16];
u_int8_t ipad[65];
u_int8_t opad[65];
size_t i;
src = (u_int8_t *)src0;
key = (u_int8_t *)key0;
/*
* compress the key into 16bytes, if key is too long.
*/
if (64 < keylen) {
md5_init();
md5_loop(key, keylen);
md5_pad();
md5_result(&tk[0]);
key = &tk[0];
keylen = 16;
}
/*
*
*/
bzero(&ipad[0], sizeof ipad);
bzero(&opad[0], sizeof opad);
bcopy(key, &ipad[0], keylen);
bcopy(key, &opad[0], keylen);
for (i = 0; i < 64; i++) {
ipad[i] ^= 0x36;
opad[i] ^= 0x5c;
}
md5_init();
md5_loop(&ipad[0], 64);
md5_loop(src, srclen);
md5_pad();
md5_result((u_int8_t *)digest);
md5_init();
md5_loop(&opad[0], 64);
md5_loop((u_int8_t *)digest, 16);
md5_pad();
md5_result((u_int8_t *)digest);
}
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