99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Based on sample code appeared on RFC2104.
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*/
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#include <sys/types.h>
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#include <sys/cdefs.h>
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#include <sys/time.h>
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#include <sys/systm.h>
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#include <crypto/md5.h>
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#include <crypto/hmac_md5.h>
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void
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hmac_md5(src0, srclen, key0, keylen, digest)
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caddr_t src0;
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size_t srclen;
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caddr_t key0;
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size_t keylen;
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caddr_t digest;
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{
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u_int8_t *src;
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u_int8_t *key;
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u_int8_t tk[16];
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u_int8_t ipad[65];
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u_int8_t opad[65];
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size_t i;
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src = (u_int8_t *)src0;
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key = (u_int8_t *)key0;
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/*
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* compress the key into 16bytes, if key is too long.
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*/
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if (64 < keylen) {
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md5_init();
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md5_loop(key, keylen);
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md5_pad();
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md5_result(&tk[0]);
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key = &tk[0];
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keylen = 16;
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}
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/*
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*
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*/
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bzero(&ipad[0], sizeof ipad);
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bzero(&opad[0], sizeof opad);
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bcopy(key, &ipad[0], keylen);
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bcopy(key, &opad[0], keylen);
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for (i = 0; i < 64; i++) {
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ipad[i] ^= 0x36;
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opad[i] ^= 0x5c;
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}
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md5_init();
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md5_loop(&ipad[0], 64);
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md5_loop(src, srclen);
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md5_pad();
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md5_result((u_int8_t *)digest);
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md5_init();
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md5_loop(&opad[0], 64);
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md5_loop((u_int8_t *)digest, 16);
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md5_pad();
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md5_result((u_int8_t *)digest);
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}
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