2 * Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2000, 2001, 2003 Internet Software Consortium.
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
18 /* $Id: sha1.c,v 1.10.2.2.2.3 2004/03/06 08:14:35 marka Exp $ */
20 /* $NetBSD: sha1.c,v 1.5 2000/01/22 22:19:14 mycroft Exp $ */
21 /* $OpenBSD: sha1.c,v 1.9 1997/07/23 21:12:32 kstailey Exp $ */
25 * By Steve Reid <steve@edmweb.com>
28 * Test Vectors (from FIPS PUB 180-1)
30 * A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
31 * "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
32 * 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
33 * A million repetitions of "a"
34 * 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
39 #include <isc/assertions.h>
41 #include <isc/string.h>
42 #include <isc/types.h>
45 #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
48 * blk0() and blk() perform the initial expand.
49 * I got the idea of expanding during the round function from SSLeay
51 #if !defined(WORDS_BIGENDIAN)
53 (block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) \
54 | (rol(block->l[i], 8) & 0x00FF00FF))
56 # define blk0(i) block->l[i]
59 (block->l[i & 15] = rol(block->l[(i + 13) & 15] \
60 ^ block->l[(i + 8) & 15] \
61 ^ block->l[(i + 2) & 15] \
62 ^ block->l[i & 15], 1))
65 * (R0+R1), R2, R3, R4 are the different operations (rounds) used in SHA1
67 #define R0(v,w,x,y,z,i) \
68 z += ((w & (x ^ y)) ^ y) + blk0(i) + 0x5A827999 + rol(v, 5); \
70 #define R1(v,w,x,y,z,i) \
71 z += ((w & (x ^ y)) ^ y) + blk(i) + 0x5A827999 + rol(v, 5); \
73 #define R2(v,w,x,y,z,i) \
74 z += (w ^ x ^ y) + blk(i) + 0x6ED9EBA1 + rol(v, 5); \
76 #define R3(v,w,x,y,z,i) \
77 z += (((w | x) & y) | (w & x)) + blk(i) + 0x8F1BBCDC + rol(v, 5); \
79 #define R4(v,w,x,y,z,i) \
80 z += (w ^ x ^ y) + blk(i) + 0xCA62C1D6 + rol(v, 5); \
89 static void do_R01(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c,
90 isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *);
91 static void do_R2(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c,
92 isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *);
93 static void do_R3(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c,
94 isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *);
95 static void do_R4(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c,
96 isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *);
98 #define nR0(v,w,x,y,z,i) R0(*v,*w,*x,*y,*z,i)
99 #define nR1(v,w,x,y,z,i) R1(*v,*w,*x,*y,*z,i)
100 #define nR2(v,w,x,y,z,i) R2(*v,*w,*x,*y,*z,i)
101 #define nR3(v,w,x,y,z,i) R3(*v,*w,*x,*y,*z,i)
102 #define nR4(v,w,x,y,z,i) R4(*v,*w,*x,*y,*z,i)
105 do_R01(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d,
106 isc_uint32_t *e, CHAR64LONG16 *block)
108 nR0(a,b,c,d,e, 0); nR0(e,a,b,c,d, 1); nR0(d,e,a,b,c, 2);
109 nR0(c,d,e,a,b, 3); nR0(b,c,d,e,a, 4); nR0(a,b,c,d,e, 5);
110 nR0(e,a,b,c,d, 6); nR0(d,e,a,b,c, 7); nR0(c,d,e,a,b, 8);
111 nR0(b,c,d,e,a, 9); nR0(a,b,c,d,e,10); nR0(e,a,b,c,d,11);
112 nR0(d,e,a,b,c,12); nR0(c,d,e,a,b,13); nR0(b,c,d,e,a,14);
113 nR0(a,b,c,d,e,15); nR1(e,a,b,c,d,16); nR1(d,e,a,b,c,17);
114 nR1(c,d,e,a,b,18); nR1(b,c,d,e,a,19);
118 do_R2(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d,
119 isc_uint32_t *e, CHAR64LONG16 *block)
121 nR2(a,b,c,d,e,20); nR2(e,a,b,c,d,21); nR2(d,e,a,b,c,22);
122 nR2(c,d,e,a,b,23); nR2(b,c,d,e,a,24); nR2(a,b,c,d,e,25);
123 nR2(e,a,b,c,d,26); nR2(d,e,a,b,c,27); nR2(c,d,e,a,b,28);
124 nR2(b,c,d,e,a,29); nR2(a,b,c,d,e,30); nR2(e,a,b,c,d,31);
125 nR2(d,e,a,b,c,32); nR2(c,d,e,a,b,33); nR2(b,c,d,e,a,34);
126 nR2(a,b,c,d,e,35); nR2(e,a,b,c,d,36); nR2(d,e,a,b,c,37);
127 nR2(c,d,e,a,b,38); nR2(b,c,d,e,a,39);
131 do_R3(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d,
132 isc_uint32_t *e, CHAR64LONG16 *block)
134 nR3(a,b,c,d,e,40); nR3(e,a,b,c,d,41); nR3(d,e,a,b,c,42);
135 nR3(c,d,e,a,b,43); nR3(b,c,d,e,a,44); nR3(a,b,c,d,e,45);
136 nR3(e,a,b,c,d,46); nR3(d,e,a,b,c,47); nR3(c,d,e,a,b,48);
137 nR3(b,c,d,e,a,49); nR3(a,b,c,d,e,50); nR3(e,a,b,c,d,51);
138 nR3(d,e,a,b,c,52); nR3(c,d,e,a,b,53); nR3(b,c,d,e,a,54);
139 nR3(a,b,c,d,e,55); nR3(e,a,b,c,d,56); nR3(d,e,a,b,c,57);
140 nR3(c,d,e,a,b,58); nR3(b,c,d,e,a,59);
144 do_R4(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d,
145 isc_uint32_t *e, CHAR64LONG16 *block)
147 nR4(a,b,c,d,e,60); nR4(e,a,b,c,d,61); nR4(d,e,a,b,c,62);
148 nR4(c,d,e,a,b,63); nR4(b,c,d,e,a,64); nR4(a,b,c,d,e,65);
149 nR4(e,a,b,c,d,66); nR4(d,e,a,b,c,67); nR4(c,d,e,a,b,68);
150 nR4(b,c,d,e,a,69); nR4(a,b,c,d,e,70); nR4(e,a,b,c,d,71);
151 nR4(d,e,a,b,c,72); nR4(c,d,e,a,b,73); nR4(b,c,d,e,a,74);
152 nR4(a,b,c,d,e,75); nR4(e,a,b,c,d,76); nR4(d,e,a,b,c,77);
153 nR4(c,d,e,a,b,78); nR4(b,c,d,e,a,79);
158 * Hash a single 512-bit block. This is the core of the algorithm.
161 transform(isc_uint32_t state[5], const unsigned char buffer[64]) {
162 isc_uint32_t a, b, c, d, e;
164 CHAR64LONG16 workspace;
166 INSIST(buffer != NULL);
167 INSIST(state != NULL);
170 (void)memcpy(block, buffer, 64);
172 /* Copy context->state[] to working vars */
180 do_R01(&a, &b, &c, &d, &e, block);
181 do_R2(&a, &b, &c, &d, &e, block);
182 do_R3(&a, &b, &c, &d, &e, block);
183 do_R4(&a, &b, &c, &d, &e, block);
185 /* 4 rounds of 20 operations each. Loop unrolled. */
186 R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
187 R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
188 R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
189 R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
190 R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
191 R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
192 R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
193 R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
194 R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
195 R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
196 R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
197 R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
198 R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
199 R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
200 R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
201 R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
202 R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
203 R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
204 R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
205 R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);
208 /* Add the working vars back into context.state[] */
216 a = b = c = d = e = 0;
221 * isc_sha1_init - Initialize new context
224 isc_sha1_init(isc_sha1_t *context)
226 INSIST(context != NULL);
228 /* SHA1 initialization constants */
229 context->state[0] = 0x67452301;
230 context->state[1] = 0xEFCDAB89;
231 context->state[2] = 0x98BADCFE;
232 context->state[3] = 0x10325476;
233 context->state[4] = 0xC3D2E1F0;
234 context->count[0] = 0;
235 context->count[1] = 0;
239 isc_sha1_invalidate(isc_sha1_t *context) {
240 memset(context, 0, sizeof(isc_sha1_t));
244 * Run your data through this.
247 isc_sha1_update(isc_sha1_t *context, const unsigned char *data,
252 INSIST(context != 0);
255 j = context->count[0];
256 if ((context->count[0] += len << 3) < j)
257 context->count[1] += (len >> 29) + 1;
259 if ((j + len) > 63) {
260 (void)memcpy(&context->buffer[j], data, (i = 64 - j));
261 transform(context->state, context->buffer);
262 for (; i + 63 < len; i += 64)
263 transform(context->state, &data[i]);
269 (void)memcpy(&context->buffer[j], &data[i], len - i);
274 * Add padding and return the message digest.
277 static const unsigned char final_200 = 128;
278 static const unsigned char final_0 = 0;
281 isc_sha1_final(isc_sha1_t *context, unsigned char *digest) {
283 unsigned char finalcount[8];
286 INSIST(context != 0);
288 for (i = 0; i < 8; i++) {
289 /* Endian independent */
290 finalcount[i] = (unsigned char)
291 ((context->count[(i >= 4 ? 0 : 1)]
292 >> ((3 - (i & 3)) * 8)) & 255);
295 isc_sha1_update(context, &final_200, 1);
296 while ((context->count[0] & 504) != 448)
297 isc_sha1_update(context, &final_0, 1);
298 /* The next Update should cause a transform() */
299 isc_sha1_update(context, finalcount, 8);
302 for (i = 0; i < 20; i++)
303 digest[i] = (unsigned char)
304 ((context->state[i >> 2]
305 >> ((3 - (i & 3)) * 8)) & 255);
308 memset(context, 0, sizeof(isc_sha1_t));