/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2002-2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/sha1.h>
#include <sys/sha1_consts.h>
#include "hmac_sha1.h"
static void
HMACHashKey(uchar_t *hashedKey, const uchar_t *key, size_t klen)
{
SHA1_CTX keyContext;
SHA1Init(&keyContext);
SHA1Update(&keyContext, key, klen);
SHA1Final(hashedKey, &keyContext);
}
void
HMACInit(SHA1_CTX *sha1Context, const uchar_t *key, size_t klen)
{
uchar_t hashedKey[20];
const uchar_t *keyptr;
uchar_t kipad[64];
int i;
if (klen > 64) {
HMACHashKey(hashedKey, key, klen);
keyptr = hashedKey;
klen = 20;
} else {
keyptr = key;
}
/* kipad = K XOR ipad */
for (i = 0; i < 64; i++) {
kipad[i] = (i < klen ? keyptr[i] : 0) ^ 0x36;
}
SHA1Init(sha1Context);
SHA1Update(sha1Context, kipad, 64);
}
void
HMACUpdate(SHA1_CTX *sha1Context, const uchar_t *data, size_t dlen)
{
SHA1Update(sha1Context, data, dlen);
}
void
HMACFinal(SHA1_CTX *sha1Context, const uchar_t *key, size_t klen,
uchar_t digest[20])
{
uchar_t hashedKey[20];
const uchar_t *keyptr;
uchar_t kopad[64];
int i;
if (klen > 64) {
HMACHashKey(hashedKey, key, klen);
keyptr = hashedKey;
klen = 20;
} else {
keyptr = key;
}
/* kopad = K XOR opad */
for (i = 0; i < 64; i++) {
kopad[i] = (i < klen ? keyptr[i] : 0) ^ 0x5c;
}
/* Compute H(kopad, H(kipad, text)) */
SHA1Final(digest, sha1Context);
SHA1Init(sha1Context);
SHA1Update(sha1Context, kopad, 64);
SHA1Update(sha1Context, digest, 20);
SHA1Final(digest, sha1Context);
}