1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 2002-2003 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate #include <sys/sha1.h>
30*0Sstevel@tonic-gate #include <sys/sha1_consts.h>
31*0Sstevel@tonic-gate #include "hmac_sha1.h"
32*0Sstevel@tonic-gate
33*0Sstevel@tonic-gate static void
HMACHashKey(uchar_t * hashedKey,const uchar_t * key,size_t klen)34*0Sstevel@tonic-gate HMACHashKey(uchar_t *hashedKey, const uchar_t *key, size_t klen)
35*0Sstevel@tonic-gate {
36*0Sstevel@tonic-gate SHA1_CTX keyContext;
37*0Sstevel@tonic-gate
38*0Sstevel@tonic-gate SHA1Init(&keyContext);
39*0Sstevel@tonic-gate SHA1Update(&keyContext, key, klen);
40*0Sstevel@tonic-gate SHA1Final(hashedKey, &keyContext);
41*0Sstevel@tonic-gate }
42*0Sstevel@tonic-gate
43*0Sstevel@tonic-gate void
HMACInit(SHA1_CTX * sha1Context,const uchar_t * key,size_t klen)44*0Sstevel@tonic-gate HMACInit(SHA1_CTX *sha1Context, const uchar_t *key, size_t klen)
45*0Sstevel@tonic-gate {
46*0Sstevel@tonic-gate uchar_t hashedKey[20];
47*0Sstevel@tonic-gate const uchar_t *keyptr;
48*0Sstevel@tonic-gate uchar_t kipad[64];
49*0Sstevel@tonic-gate int i;
50*0Sstevel@tonic-gate
51*0Sstevel@tonic-gate if (klen > 64) {
52*0Sstevel@tonic-gate HMACHashKey(hashedKey, key, klen);
53*0Sstevel@tonic-gate keyptr = hashedKey;
54*0Sstevel@tonic-gate klen = 20;
55*0Sstevel@tonic-gate } else {
56*0Sstevel@tonic-gate keyptr = key;
57*0Sstevel@tonic-gate }
58*0Sstevel@tonic-gate
59*0Sstevel@tonic-gate /* kipad = K XOR ipad */
60*0Sstevel@tonic-gate for (i = 0; i < 64; i++) {
61*0Sstevel@tonic-gate kipad[i] = (i < klen ? keyptr[i] : 0) ^ 0x36;
62*0Sstevel@tonic-gate }
63*0Sstevel@tonic-gate
64*0Sstevel@tonic-gate SHA1Init(sha1Context);
65*0Sstevel@tonic-gate SHA1Update(sha1Context, kipad, 64);
66*0Sstevel@tonic-gate }
67*0Sstevel@tonic-gate
68*0Sstevel@tonic-gate void
HMACUpdate(SHA1_CTX * sha1Context,const uchar_t * data,size_t dlen)69*0Sstevel@tonic-gate HMACUpdate(SHA1_CTX *sha1Context, const uchar_t *data, size_t dlen)
70*0Sstevel@tonic-gate {
71*0Sstevel@tonic-gate SHA1Update(sha1Context, data, dlen);
72*0Sstevel@tonic-gate }
73*0Sstevel@tonic-gate
74*0Sstevel@tonic-gate void
HMACFinal(SHA1_CTX * sha1Context,const uchar_t * key,size_t klen,uchar_t digest[20])75*0Sstevel@tonic-gate HMACFinal(SHA1_CTX *sha1Context, const uchar_t *key, size_t klen,
76*0Sstevel@tonic-gate uchar_t digest[20])
77*0Sstevel@tonic-gate {
78*0Sstevel@tonic-gate uchar_t hashedKey[20];
79*0Sstevel@tonic-gate const uchar_t *keyptr;
80*0Sstevel@tonic-gate uchar_t kopad[64];
81*0Sstevel@tonic-gate int i;
82*0Sstevel@tonic-gate
83*0Sstevel@tonic-gate if (klen > 64) {
84*0Sstevel@tonic-gate HMACHashKey(hashedKey, key, klen);
85*0Sstevel@tonic-gate keyptr = hashedKey;
86*0Sstevel@tonic-gate klen = 20;
87*0Sstevel@tonic-gate } else {
88*0Sstevel@tonic-gate keyptr = key;
89*0Sstevel@tonic-gate }
90*0Sstevel@tonic-gate
91*0Sstevel@tonic-gate /* kopad = K XOR opad */
92*0Sstevel@tonic-gate for (i = 0; i < 64; i++) {
93*0Sstevel@tonic-gate kopad[i] = (i < klen ? keyptr[i] : 0) ^ 0x5c;
94*0Sstevel@tonic-gate }
95*0Sstevel@tonic-gate
96*0Sstevel@tonic-gate /* Compute H(kopad, H(kipad, text)) */
97*0Sstevel@tonic-gate SHA1Final(digest, sha1Context);
98*0Sstevel@tonic-gate
99*0Sstevel@tonic-gate SHA1Init(sha1Context);
100*0Sstevel@tonic-gate SHA1Update(sha1Context, kopad, 64);
101*0Sstevel@tonic-gate SHA1Update(sha1Context, digest, 20);
102*0Sstevel@tonic-gate SHA1Final(digest, sha1Context);
103*0Sstevel@tonic-gate }
104