sha1.c revision 1.4
1/* $NetBSD: sha1.c,v 1.4 2016/01/08 21:35:36 christos Exp $ */ 2 3/* 4 * Copyright (C) 2004, 2005, 2007, 2009, 2011, 2012 Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (C) 2000, 2001, 2003 Internet Software Consortium. 6 * 7 * Permission to use, copy, modify, and/or distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 13 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 * PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20/* Id */ 21 22/* NetBSD: sha1.c,v 1.5 2000/01/22 22:19:14 mycroft Exp */ 23/* $OpenBSD: sha1.c,v 1.9 1997/07/23 21:12:32 kstailey Exp $ */ 24 25/*! \file 26 * SHA-1 in C 27 * \author By Steve Reid <steve@edmweb.com> 28 * 100% Public Domain 29 * \verbatim 30 * Test Vectors (from FIPS PUB 180-1) 31 * "abc" 32 * A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D 33 * "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" 34 * 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1 35 * A million repetitions of "a" 36 * 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F 37 * \endverbatim 38 */ 39 40#include "config.h" 41 42#include <isc/assertions.h> 43#include <isc/platform.h> 44#include <isc/sha1.h> 45#include <isc/string.h> 46#include <isc/types.h> 47#include <isc/util.h> 48 49#ifdef ISC_PLATFORM_OPENSSLHASH 50 51void 52isc_sha1_init(isc_sha1_t *context) 53{ 54 INSIST(context != NULL); 55 56 EVP_DigestInit(context, EVP_sha1()); 57} 58 59void 60isc_sha1_invalidate(isc_sha1_t *context) { 61 EVP_MD_CTX_cleanup(context); 62} 63 64void 65isc_sha1_update(isc_sha1_t *context, const unsigned char *data, 66 unsigned int len) 67{ 68 INSIST(context != 0); 69 INSIST(data != 0); 70 71 EVP_DigestUpdate(context, (const void *) data, (size_t) len); 72} 73 74void 75isc_sha1_final(isc_sha1_t *context, unsigned char *digest) { 76 INSIST(digest != 0); 77 INSIST(context != 0); 78 79 EVP_DigestFinal(context, digest, NULL); 80} 81 82#else 83 84#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) 85 86/*@{*/ 87/*! 88 * blk0() and blk() perform the initial expand. 89 * I got the idea of expanding during the round function from SSLeay 90 */ 91#if !defined(WORDS_BIGENDIAN) 92# define blk0(i) \ 93 (block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) \ 94 | (rol(block->l[i], 8) & 0x00FF00FF)) 95#else 96# define blk0(i) block->l[i] 97#endif 98#define blk(i) \ 99 (block->l[i & 15] = rol(block->l[(i + 13) & 15] \ 100 ^ block->l[(i + 8) & 15] \ 101 ^ block->l[(i + 2) & 15] \ 102 ^ block->l[i & 15], 1)) 103 104/*@}*/ 105/*@{*/ 106/*! 107 * (R0+R1), R2, R3, R4 are the different operations (rounds) used in SHA1 108 */ 109#define R0(v,w,x,y,z,i) \ 110 z += ((w & (x ^ y)) ^ y) + blk0(i) + 0x5A827999 + rol(v, 5); \ 111 w = rol(w, 30); 112#define R1(v,w,x,y,z,i) \ 113 z += ((w & (x ^ y)) ^ y) + blk(i) + 0x5A827999 + rol(v, 5); \ 114 w = rol(w, 30); 115#define R2(v,w,x,y,z,i) \ 116 z += (w ^ x ^ y) + blk(i) + 0x6ED9EBA1 + rol(v, 5); \ 117 w = rol(w, 30); 118#define R3(v,w,x,y,z,i) \ 119 z += (((w | x) & y) | (w & x)) + blk(i) + 0x8F1BBCDC + rol(v, 5); \ 120 w = rol(w, 30); 121#define R4(v,w,x,y,z,i) \ 122 z += (w ^ x ^ y) + blk(i) + 0xCA62C1D6 + rol(v, 5); \ 123 w = rol(w, 30); 124 125/*@}*/ 126 127typedef union { 128 unsigned char c[64]; 129 unsigned int l[16]; 130} CHAR64LONG16; 131 132#ifdef __sparc_v9__ 133static void do_R01(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, 134 isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *); 135static void do_R2(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, 136 isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *); 137static void do_R3(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, 138 isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *); 139static void do_R4(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, 140 isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *); 141 142#define nR0(v,w,x,y,z,i) R0(*v,*w,*x,*y,*z,i) 143#define nR1(v,w,x,y,z,i) R1(*v,*w,*x,*y,*z,i) 144#define nR2(v,w,x,y,z,i) R2(*v,*w,*x,*y,*z,i) 145#define nR3(v,w,x,y,z,i) R3(*v,*w,*x,*y,*z,i) 146#define nR4(v,w,x,y,z,i) R4(*v,*w,*x,*y,*z,i) 147 148static void 149do_R01(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d, 150 isc_uint32_t *e, CHAR64LONG16 *block) 151{ 152 nR0(a,b,c,d,e, 0); nR0(e,a,b,c,d, 1); nR0(d,e,a,b,c, 2); 153 nR0(c,d,e,a,b, 3); nR0(b,c,d,e,a, 4); nR0(a,b,c,d,e, 5); 154 nR0(e,a,b,c,d, 6); nR0(d,e,a,b,c, 7); nR0(c,d,e,a,b, 8); 155 nR0(b,c,d,e,a, 9); nR0(a,b,c,d,e,10); nR0(e,a,b,c,d,11); 156 nR0(d,e,a,b,c,12); nR0(c,d,e,a,b,13); nR0(b,c,d,e,a,14); 157 nR0(a,b,c,d,e,15); nR1(e,a,b,c,d,16); nR1(d,e,a,b,c,17); 158 nR1(c,d,e,a,b,18); nR1(b,c,d,e,a,19); 159} 160 161static void 162do_R2(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d, 163 isc_uint32_t *e, CHAR64LONG16 *block) 164{ 165 nR2(a,b,c,d,e,20); nR2(e,a,b,c,d,21); nR2(d,e,a,b,c,22); 166 nR2(c,d,e,a,b,23); nR2(b,c,d,e,a,24); nR2(a,b,c,d,e,25); 167 nR2(e,a,b,c,d,26); nR2(d,e,a,b,c,27); nR2(c,d,e,a,b,28); 168 nR2(b,c,d,e,a,29); nR2(a,b,c,d,e,30); nR2(e,a,b,c,d,31); 169 nR2(d,e,a,b,c,32); nR2(c,d,e,a,b,33); nR2(b,c,d,e,a,34); 170 nR2(a,b,c,d,e,35); nR2(e,a,b,c,d,36); nR2(d,e,a,b,c,37); 171 nR2(c,d,e,a,b,38); nR2(b,c,d,e,a,39); 172} 173 174static void 175do_R3(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d, 176 isc_uint32_t *e, CHAR64LONG16 *block) 177{ 178 nR3(a,b,c,d,e,40); nR3(e,a,b,c,d,41); nR3(d,e,a,b,c,42); 179 nR3(c,d,e,a,b,43); nR3(b,c,d,e,a,44); nR3(a,b,c,d,e,45); 180 nR3(e,a,b,c,d,46); nR3(d,e,a,b,c,47); nR3(c,d,e,a,b,48); 181 nR3(b,c,d,e,a,49); nR3(a,b,c,d,e,50); nR3(e,a,b,c,d,51); 182 nR3(d,e,a,b,c,52); nR3(c,d,e,a,b,53); nR3(b,c,d,e,a,54); 183 nR3(a,b,c,d,e,55); nR3(e,a,b,c,d,56); nR3(d,e,a,b,c,57); 184 nR3(c,d,e,a,b,58); nR3(b,c,d,e,a,59); 185} 186 187static void 188do_R4(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d, 189 isc_uint32_t *e, CHAR64LONG16 *block) 190{ 191 nR4(a,b,c,d,e,60); nR4(e,a,b,c,d,61); nR4(d,e,a,b,c,62); 192 nR4(c,d,e,a,b,63); nR4(b,c,d,e,a,64); nR4(a,b,c,d,e,65); 193 nR4(e,a,b,c,d,66); nR4(d,e,a,b,c,67); nR4(c,d,e,a,b,68); 194 nR4(b,c,d,e,a,69); nR4(a,b,c,d,e,70); nR4(e,a,b,c,d,71); 195 nR4(d,e,a,b,c,72); nR4(c,d,e,a,b,73); nR4(b,c,d,e,a,74); 196 nR4(a,b,c,d,e,75); nR4(e,a,b,c,d,76); nR4(d,e,a,b,c,77); 197 nR4(c,d,e,a,b,78); nR4(b,c,d,e,a,79); 198} 199#endif 200 201/*! 202 * Hash a single 512-bit block. This is the core of the algorithm. 203 */ 204static void 205transform(isc_uint32_t state[5], const unsigned char buffer[64]) { 206 isc_uint32_t a, b, c, d, e; 207 CHAR64LONG16 *block; 208 CHAR64LONG16 workspace; 209 210 INSIST(buffer != NULL); 211 INSIST(state != NULL); 212 213 block = &workspace; 214 (void)memcpy(block, buffer, 64); 215 216 /* Copy context->state[] to working vars */ 217 a = state[0]; 218 b = state[1]; 219 c = state[2]; 220 d = state[3]; 221 e = state[4]; 222 223#ifdef __sparc_v9__ 224 do_R01(&a, &b, &c, &d, &e, block); 225 do_R2(&a, &b, &c, &d, &e, block); 226 do_R3(&a, &b, &c, &d, &e, block); 227 do_R4(&a, &b, &c, &d, &e, block); 228#else 229 /* 4 rounds of 20 operations each. Loop unrolled. */ 230 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); 231 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); 232 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); 233 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); 234 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); 235 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); 236 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); 237 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); 238 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); 239 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); 240 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); 241 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); 242 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); 243 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); 244 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); 245 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); 246 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); 247 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); 248 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); 249 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); 250#endif 251 252 /* Add the working vars back into context.state[] */ 253 state[0] += a; 254 state[1] += b; 255 state[2] += c; 256 state[3] += d; 257 state[4] += e; 258 259 /* Wipe variables */ 260 a = b = c = d = e = 0; 261 /* Avoid compiler warnings */ 262 POST(a); POST(b); POST(c); POST(d); POST(e); 263} 264 265 266/*! 267 * isc_sha1_init - Initialize new context 268 */ 269void 270isc_sha1_init(isc_sha1_t *context) 271{ 272 INSIST(context != NULL); 273 274 /* SHA1 initialization constants */ 275 context->state[0] = 0x67452301; 276 context->state[1] = 0xEFCDAB89; 277 context->state[2] = 0x98BADCFE; 278 context->state[3] = 0x10325476; 279 context->state[4] = 0xC3D2E1F0; 280 context->count[0] = 0; 281 context->count[1] = 0; 282} 283 284void 285isc_sha1_invalidate(isc_sha1_t *context) { 286 memset(context, 0, sizeof(isc_sha1_t)); 287} 288 289/*! 290 * Run your data through this. 291 */ 292void 293isc_sha1_update(isc_sha1_t *context, const unsigned char *data, 294 unsigned int len) 295{ 296 unsigned int i, j; 297 298 INSIST(context != 0); 299 INSIST(data != 0); 300 301 j = context->count[0]; 302 if ((context->count[0] += len << 3) < j) 303 context->count[1] += (len >> 29) + 1; 304 j = (j >> 3) & 63; 305 if ((j + len) > 63) { 306 (void)memcpy(&context->buffer[j], data, (i = 64 - j)); 307 transform(context->state, context->buffer); 308 for (; i + 63 < len; i += 64) 309 transform(context->state, &data[i]); 310 j = 0; 311 } else { 312 i = 0; 313 } 314 315 (void)memcpy(&context->buffer[j], &data[i], len - i); 316} 317 318 319/*! 320 * Add padding and return the message digest. 321 */ 322 323static const unsigned char final_200 = 128; 324static const unsigned char final_0 = 0; 325 326void 327isc_sha1_final(isc_sha1_t *context, unsigned char *digest) { 328 unsigned int i; 329 unsigned char finalcount[8]; 330 331 INSIST(digest != 0); 332 INSIST(context != 0); 333 334 for (i = 0; i < 8; i++) { 335 /* Endian independent */ 336 finalcount[i] = (unsigned char) 337 ((context->count[(i >= 4 ? 0 : 1)] 338 >> ((3 - (i & 3)) * 8)) & 255); 339 } 340 341 isc_sha1_update(context, &final_200, 1); 342 while ((context->count[0] & 504) != 448) 343 isc_sha1_update(context, &final_0, 1); 344 /* The next Update should cause a transform() */ 345 isc_sha1_update(context, finalcount, 8); 346 347 if (digest) { 348 for (i = 0; i < 20; i++) 349 digest[i] = (unsigned char) 350 ((context->state[i >> 2] 351 >> ((3 - (i & 3)) * 8)) & 255); 352 } 353 354 memset(context, 0, sizeof(isc_sha1_t)); 355} 356#endif 357