1 /*
2 * Copyright (C) 2004, 2005, 2007, 2009, 2011, 2012 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 2000, 2001, 2003 Internet Software Consortium.
4 *
5 * Permission to use, copy, modify, and/or 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.
8 *
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.
16 */
17
18 /* $Id$ */
19
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 $ */
22
23 /*! \file
24 * SHA-1 in C
25 * \author By Steve Reid <steve@edmweb.com>
26 * 100% Public Domain
27 * \verbatim
28 * Test Vectors (from FIPS PUB 180-1)
29 * "abc"
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
35 * \endverbatim
36 */
37
38 #include "config.h"
39
40 #include <isc/assertions.h>
41 #include <isc/platform.h>
42 #include <isc/sha1.h>
43 #include <isc/string.h>
44 #include <isc/types.h>
45 #include <isc/util.h>
46
47 #ifdef ISC_PLATFORM_OPENSSLHASH
48
49 void
isc_sha1_init(isc_sha1_t * context)50 isc_sha1_init(isc_sha1_t *context)
51 {
52 INSIST(context != NULL);
53
54 EVP_DigestInit(context, EVP_sha1());
55 }
56
57 void
isc_sha1_invalidate(isc_sha1_t * context)58 isc_sha1_invalidate(isc_sha1_t *context) {
59 EVP_MD_CTX_cleanup(context);
60 }
61
62 void
isc_sha1_update(isc_sha1_t * context,const unsigned char * data,unsigned int len)63 isc_sha1_update(isc_sha1_t *context, const unsigned char *data,
64 unsigned int len)
65 {
66 INSIST(context != 0);
67 INSIST(data != 0);
68
69 EVP_DigestUpdate(context, (const void *) data, (size_t) len);
70 }
71
72 void
isc_sha1_final(isc_sha1_t * context,unsigned char * digest)73 isc_sha1_final(isc_sha1_t *context, unsigned char *digest) {
74 INSIST(digest != 0);
75 INSIST(context != 0);
76
77 EVP_DigestFinal(context, digest, NULL);
78 }
79
80 #else
81
82 #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
83
84 /*@{*/
85 /*!
86 * blk0() and blk() perform the initial expand.
87 * I got the idea of expanding during the round function from SSLeay
88 */
89 #if !defined(WORDS_BIGENDIAN)
90 # define blk0(i) \
91 (block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) \
92 | (rol(block->l[i], 8) & 0x00FF00FF))
93 #else
94 # define blk0(i) block->l[i]
95 #endif
96 #define blk(i) \
97 (block->l[i & 15] = rol(block->l[(i + 13) & 15] \
98 ^ block->l[(i + 8) & 15] \
99 ^ block->l[(i + 2) & 15] \
100 ^ block->l[i & 15], 1))
101
102 /*@}*/
103 /*@{*/
104 /*!
105 * (R0+R1), R2, R3, R4 are the different operations (rounds) used in SHA1
106 */
107 #define R0(v,w,x,y,z,i) \
108 z += ((w & (x ^ y)) ^ y) + blk0(i) + 0x5A827999 + rol(v, 5); \
109 w = rol(w, 30);
110 #define R1(v,w,x,y,z,i) \
111 z += ((w & (x ^ y)) ^ y) + blk(i) + 0x5A827999 + rol(v, 5); \
112 w = rol(w, 30);
113 #define R2(v,w,x,y,z,i) \
114 z += (w ^ x ^ y) + blk(i) + 0x6ED9EBA1 + rol(v, 5); \
115 w = rol(w, 30);
116 #define R3(v,w,x,y,z,i) \
117 z += (((w | x) & y) | (w & x)) + blk(i) + 0x8F1BBCDC + rol(v, 5); \
118 w = rol(w, 30);
119 #define R4(v,w,x,y,z,i) \
120 z += (w ^ x ^ y) + blk(i) + 0xCA62C1D6 + rol(v, 5); \
121 w = rol(w, 30);
122
123 /*@}*/
124
125 typedef union {
126 unsigned char c[64];
127 unsigned int l[16];
128 } CHAR64LONG16;
129
130 #ifdef __sparc_v9__
131 static void do_R01(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c,
132 isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *);
133 static void do_R2(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c,
134 isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *);
135 static void do_R3(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c,
136 isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *);
137 static void do_R4(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c,
138 isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *);
139
140 #define nR0(v,w,x,y,z,i) R0(*v,*w,*x,*y,*z,i)
141 #define nR1(v,w,x,y,z,i) R1(*v,*w,*x,*y,*z,i)
142 #define nR2(v,w,x,y,z,i) R2(*v,*w,*x,*y,*z,i)
143 #define nR3(v,w,x,y,z,i) R3(*v,*w,*x,*y,*z,i)
144 #define nR4(v,w,x,y,z,i) R4(*v,*w,*x,*y,*z,i)
145
146 static void
do_R01(isc_uint32_t * a,isc_uint32_t * b,isc_uint32_t * c,isc_uint32_t * d,isc_uint32_t * e,CHAR64LONG16 * block)147 do_R01(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d,
148 isc_uint32_t *e, CHAR64LONG16 *block)
149 {
150 nR0(a,b,c,d,e, 0); nR0(e,a,b,c,d, 1); nR0(d,e,a,b,c, 2);
151 nR0(c,d,e,a,b, 3); nR0(b,c,d,e,a, 4); nR0(a,b,c,d,e, 5);
152 nR0(e,a,b,c,d, 6); nR0(d,e,a,b,c, 7); nR0(c,d,e,a,b, 8);
153 nR0(b,c,d,e,a, 9); nR0(a,b,c,d,e,10); nR0(e,a,b,c,d,11);
154 nR0(d,e,a,b,c,12); nR0(c,d,e,a,b,13); nR0(b,c,d,e,a,14);
155 nR0(a,b,c,d,e,15); nR1(e,a,b,c,d,16); nR1(d,e,a,b,c,17);
156 nR1(c,d,e,a,b,18); nR1(b,c,d,e,a,19);
157 }
158
159 static void
do_R2(isc_uint32_t * a,isc_uint32_t * b,isc_uint32_t * c,isc_uint32_t * d,isc_uint32_t * e,CHAR64LONG16 * block)160 do_R2(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d,
161 isc_uint32_t *e, CHAR64LONG16 *block)
162 {
163 nR2(a,b,c,d,e,20); nR2(e,a,b,c,d,21); nR2(d,e,a,b,c,22);
164 nR2(c,d,e,a,b,23); nR2(b,c,d,e,a,24); nR2(a,b,c,d,e,25);
165 nR2(e,a,b,c,d,26); nR2(d,e,a,b,c,27); nR2(c,d,e,a,b,28);
166 nR2(b,c,d,e,a,29); nR2(a,b,c,d,e,30); nR2(e,a,b,c,d,31);
167 nR2(d,e,a,b,c,32); nR2(c,d,e,a,b,33); nR2(b,c,d,e,a,34);
168 nR2(a,b,c,d,e,35); nR2(e,a,b,c,d,36); nR2(d,e,a,b,c,37);
169 nR2(c,d,e,a,b,38); nR2(b,c,d,e,a,39);
170 }
171
172 static void
do_R3(isc_uint32_t * a,isc_uint32_t * b,isc_uint32_t * c,isc_uint32_t * d,isc_uint32_t * e,CHAR64LONG16 * block)173 do_R3(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d,
174 isc_uint32_t *e, CHAR64LONG16 *block)
175 {
176 nR3(a,b,c,d,e,40); nR3(e,a,b,c,d,41); nR3(d,e,a,b,c,42);
177 nR3(c,d,e,a,b,43); nR3(b,c,d,e,a,44); nR3(a,b,c,d,e,45);
178 nR3(e,a,b,c,d,46); nR3(d,e,a,b,c,47); nR3(c,d,e,a,b,48);
179 nR3(b,c,d,e,a,49); nR3(a,b,c,d,e,50); nR3(e,a,b,c,d,51);
180 nR3(d,e,a,b,c,52); nR3(c,d,e,a,b,53); nR3(b,c,d,e,a,54);
181 nR3(a,b,c,d,e,55); nR3(e,a,b,c,d,56); nR3(d,e,a,b,c,57);
182 nR3(c,d,e,a,b,58); nR3(b,c,d,e,a,59);
183 }
184
185 static void
do_R4(isc_uint32_t * a,isc_uint32_t * b,isc_uint32_t * c,isc_uint32_t * d,isc_uint32_t * e,CHAR64LONG16 * block)186 do_R4(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d,
187 isc_uint32_t *e, CHAR64LONG16 *block)
188 {
189 nR4(a,b,c,d,e,60); nR4(e,a,b,c,d,61); nR4(d,e,a,b,c,62);
190 nR4(c,d,e,a,b,63); nR4(b,c,d,e,a,64); nR4(a,b,c,d,e,65);
191 nR4(e,a,b,c,d,66); nR4(d,e,a,b,c,67); nR4(c,d,e,a,b,68);
192 nR4(b,c,d,e,a,69); nR4(a,b,c,d,e,70); nR4(e,a,b,c,d,71);
193 nR4(d,e,a,b,c,72); nR4(c,d,e,a,b,73); nR4(b,c,d,e,a,74);
194 nR4(a,b,c,d,e,75); nR4(e,a,b,c,d,76); nR4(d,e,a,b,c,77);
195 nR4(c,d,e,a,b,78); nR4(b,c,d,e,a,79);
196 }
197 #endif
198
199 /*!
200 * Hash a single 512-bit block. This is the core of the algorithm.
201 */
202 static void
transform(isc_uint32_t state[5],const unsigned char buffer[64])203 transform(isc_uint32_t state[5], const unsigned char buffer[64]) {
204 isc_uint32_t a, b, c, d, e;
205 CHAR64LONG16 *block;
206 CHAR64LONG16 workspace;
207
208 INSIST(buffer != NULL);
209 INSIST(state != NULL);
210
211 block = &workspace;
212 (void)memcpy(block, buffer, 64);
213
214 /* Copy context->state[] to working vars */
215 a = state[0];
216 b = state[1];
217 c = state[2];
218 d = state[3];
219 e = state[4];
220
221 #ifdef __sparc_v9__
222 do_R01(&a, &b, &c, &d, &e, block);
223 do_R2(&a, &b, &c, &d, &e, block);
224 do_R3(&a, &b, &c, &d, &e, block);
225 do_R4(&a, &b, &c, &d, &e, block);
226 #else
227 /* 4 rounds of 20 operations each. Loop unrolled. */
228 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);
229 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);
230 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);
231 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);
232 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);
233 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);
234 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);
235 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);
236 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);
237 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);
238 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);
239 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);
240 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);
241 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);
242 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);
243 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);
244 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);
245 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);
246 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);
247 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);
248 #endif
249
250 /* Add the working vars back into context.state[] */
251 state[0] += a;
252 state[1] += b;
253 state[2] += c;
254 state[3] += d;
255 state[4] += e;
256
257 /* Wipe variables */
258 a = b = c = d = e = 0;
259 /* Avoid compiler warnings */
260 POST(a); POST(b); POST(c); POST(d); POST(e);
261 }
262
263
264 /*!
265 * isc_sha1_init - Initialize new context
266 */
267 void
isc_sha1_init(isc_sha1_t * context)268 isc_sha1_init(isc_sha1_t *context)
269 {
270 INSIST(context != NULL);
271
272 /* SHA1 initialization constants */
273 context->state[0] = 0x67452301;
274 context->state[1] = 0xEFCDAB89;
275 context->state[2] = 0x98BADCFE;
276 context->state[3] = 0x10325476;
277 context->state[4] = 0xC3D2E1F0;
278 context->count[0] = 0;
279 context->count[1] = 0;
280 }
281
282 void
isc_sha1_invalidate(isc_sha1_t * context)283 isc_sha1_invalidate(isc_sha1_t *context) {
284 memset(context, 0, sizeof(isc_sha1_t));
285 }
286
287 /*!
288 * Run your data through this.
289 */
290 void
isc_sha1_update(isc_sha1_t * context,const unsigned char * data,unsigned int len)291 isc_sha1_update(isc_sha1_t *context, const unsigned char *data,
292 unsigned int len)
293 {
294 unsigned int i, j;
295
296 INSIST(context != 0);
297 INSIST(data != 0);
298
299 j = context->count[0];
300 if ((context->count[0] += len << 3) < j)
301 context->count[1] += (len >> 29) + 1;
302 j = (j >> 3) & 63;
303 if ((j + len) > 63) {
304 (void)memcpy(&context->buffer[j], data, (i = 64 - j));
305 transform(context->state, context->buffer);
306 for (; i + 63 < len; i += 64)
307 transform(context->state, &data[i]);
308 j = 0;
309 } else {
310 i = 0;
311 }
312
313 (void)memcpy(&context->buffer[j], &data[i], len - i);
314 }
315
316
317 /*!
318 * Add padding and return the message digest.
319 */
320
321 static const unsigned char final_200 = 128;
322 static const unsigned char final_0 = 0;
323
324 void
isc_sha1_final(isc_sha1_t * context,unsigned char * digest)325 isc_sha1_final(isc_sha1_t *context, unsigned char *digest) {
326 unsigned int i;
327 unsigned char finalcount[8];
328
329 INSIST(digest != 0);
330 INSIST(context != 0);
331
332 for (i = 0; i < 8; i++) {
333 /* Endian independent */
334 finalcount[i] = (unsigned char)
335 ((context->count[(i >= 4 ? 0 : 1)]
336 >> ((3 - (i & 3)) * 8)) & 255);
337 }
338
339 isc_sha1_update(context, &final_200, 1);
340 while ((context->count[0] & 504) != 448)
341 isc_sha1_update(context, &final_0, 1);
342 /* The next Update should cause a transform() */
343 isc_sha1_update(context, finalcount, 8);
344
345 if (digest) {
346 for (i = 0; i < 20; i++)
347 digest[i] = (unsigned char)
348 ((context->state[i >> 2]
349 >> ((3 - (i & 3)) * 8)) & 255);
350 }
351
352 memset(context, 0, sizeof(isc_sha1_t));
353 }
354 #endif
355