1/* $NetBSD: sha1.c,v 1.1.1.1 2009/12/13 16:54:18 kardel Exp $ */ 2 3/* 4 * Copyright (C) 2004, 2005, 2007 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: sha1.c,v 1.18 2007/06/19 23:47:17 tbox Exp */ 21 22/* $NetBSD: sha1.c,v 1.1.1.1 2009/12/13 16:54:18 kardel 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/sha1.h> 44#include <isc/string.h> 45#include <isc/types.h> 46#include <isc/util.h> 47 48#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) 49 50/*@{*/ 51/*! 52 * blk0() and blk() perform the initial expand. 53 * I got the idea of expanding during the round function from SSLeay 54 */ 55#if !defined(WORDS_BIGENDIAN) 56# define blk0(i) \ 57 (block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) \ 58 | (rol(block->l[i], 8) & 0x00FF00FF)) 59#else 60# define blk0(i) block->l[i] 61#endif 62#define blk(i) \ 63 (block->l[i & 15] = rol(block->l[(i + 13) & 15] \ 64 ^ block->l[(i + 8) & 15] \ 65 ^ block->l[(i + 2) & 15] \ 66 ^ block->l[i & 15], 1)) 67 68/*@}*/ 69/*@{*/ 70/*! 71 * (R0+R1), R2, R3, R4 are the different operations (rounds) used in SHA1 72 */ 73#define R0(v,w,x,y,z,i) \ 74 z += ((w & (x ^ y)) ^ y) + blk0(i) + 0x5A827999 + rol(v, 5); \ 75 w = rol(w, 30); 76#define R1(v,w,x,y,z,i) \ 77 z += ((w & (x ^ y)) ^ y) + blk(i) + 0x5A827999 + rol(v, 5); \ 78 w = rol(w, 30); 79#define R2(v,w,x,y,z,i) \ 80 z += (w ^ x ^ y) + blk(i) + 0x6ED9EBA1 + rol(v, 5); \ 81 w = rol(w, 30); 82#define R3(v,w,x,y,z,i) \ 83 z += (((w | x) & y) | (w & x)) + blk(i) + 0x8F1BBCDC + rol(v, 5); \ 84 w = rol(w, 30); 85#define R4(v,w,x,y,z,i) \ 86 z += (w ^ x ^ y) + blk(i) + 0xCA62C1D6 + rol(v, 5); \ 87 w = rol(w, 30); 88 89/*@}*/ 90 91typedef union { 92 unsigned char c[64]; 93 unsigned int l[16]; 94} CHAR64LONG16; 95 96#ifdef __sparc_v9__ 97static void do_R01(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, 98 isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *); 99static void do_R2(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, 100 isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *); 101static void do_R3(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, 102 isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *); 103static void do_R4(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, 104 isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *); 105 106#define nR0(v,w,x,y,z,i) R0(*v,*w,*x,*y,*z,i) 107#define nR1(v,w,x,y,z,i) R1(*v,*w,*x,*y,*z,i) 108#define nR2(v,w,x,y,z,i) R2(*v,*w,*x,*y,*z,i) 109#define nR3(v,w,x,y,z,i) R3(*v,*w,*x,*y,*z,i) 110#define nR4(v,w,x,y,z,i) R4(*v,*w,*x,*y,*z,i) 111 112static void 113do_R01(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d, 114 isc_uint32_t *e, CHAR64LONG16 *block) 115{ 116 nR0(a,b,c,d,e, 0); nR0(e,a,b,c,d, 1); nR0(d,e,a,b,c, 2); 117 nR0(c,d,e,a,b, 3); nR0(b,c,d,e,a, 4); nR0(a,b,c,d,e, 5); 118 nR0(e,a,b,c,d, 6); nR0(d,e,a,b,c, 7); nR0(c,d,e,a,b, 8); 119 nR0(b,c,d,e,a, 9); nR0(a,b,c,d,e,10); nR0(e,a,b,c,d,11); 120 nR0(d,e,a,b,c,12); nR0(c,d,e,a,b,13); nR0(b,c,d,e,a,14); 121 nR0(a,b,c,d,e,15); nR1(e,a,b,c,d,16); nR1(d,e,a,b,c,17); 122 nR1(c,d,e,a,b,18); nR1(b,c,d,e,a,19); 123} 124 125static void 126do_R2(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d, 127 isc_uint32_t *e, CHAR64LONG16 *block) 128{ 129 nR2(a,b,c,d,e,20); nR2(e,a,b,c,d,21); nR2(d,e,a,b,c,22); 130 nR2(c,d,e,a,b,23); nR2(b,c,d,e,a,24); nR2(a,b,c,d,e,25); 131 nR2(e,a,b,c,d,26); nR2(d,e,a,b,c,27); nR2(c,d,e,a,b,28); 132 nR2(b,c,d,e,a,29); nR2(a,b,c,d,e,30); nR2(e,a,b,c,d,31); 133 nR2(d,e,a,b,c,32); nR2(c,d,e,a,b,33); nR2(b,c,d,e,a,34); 134 nR2(a,b,c,d,e,35); nR2(e,a,b,c,d,36); nR2(d,e,a,b,c,37); 135 nR2(c,d,e,a,b,38); nR2(b,c,d,e,a,39); 136} 137 138static void 139do_R3(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d, 140 isc_uint32_t *e, CHAR64LONG16 *block) 141{ 142 nR3(a,b,c,d,e,40); nR3(e,a,b,c,d,41); nR3(d,e,a,b,c,42); 143 nR3(c,d,e,a,b,43); nR3(b,c,d,e,a,44); nR3(a,b,c,d,e,45); 144 nR3(e,a,b,c,d,46); nR3(d,e,a,b,c,47); nR3(c,d,e,a,b,48); 145 nR3(b,c,d,e,a,49); nR3(a,b,c,d,e,50); nR3(e,a,b,c,d,51); 146 nR3(d,e,a,b,c,52); nR3(c,d,e,a,b,53); nR3(b,c,d,e,a,54); 147 nR3(a,b,c,d,e,55); nR3(e,a,b,c,d,56); nR3(d,e,a,b,c,57); 148 nR3(c,d,e,a,b,58); nR3(b,c,d,e,a,59); 149} 150 151static void 152do_R4(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d, 153 isc_uint32_t *e, CHAR64LONG16 *block) 154{ 155 nR4(a,b,c,d,e,60); nR4(e,a,b,c,d,61); nR4(d,e,a,b,c,62); 156 nR4(c,d,e,a,b,63); nR4(b,c,d,e,a,64); nR4(a,b,c,d,e,65); 157 nR4(e,a,b,c,d,66); nR4(d,e,a,b,c,67); nR4(c,d,e,a,b,68); 158 nR4(b,c,d,e,a,69); nR4(a,b,c,d,e,70); nR4(e,a,b,c,d,71); 159 nR4(d,e,a,b,c,72); nR4(c,d,e,a,b,73); nR4(b,c,d,e,a,74); 160 nR4(a,b,c,d,e,75); nR4(e,a,b,c,d,76); nR4(d,e,a,b,c,77); 161 nR4(c,d,e,a,b,78); nR4(b,c,d,e,a,79); 162} 163#endif 164 165/*! 166 * Hash a single 512-bit block. This is the core of the algorithm. 167 */ 168static void 169transform(isc_uint32_t state[5], const unsigned char buffer[64]) { 170 isc_uint32_t a, b, c, d, e; 171 CHAR64LONG16 *block; 172 CHAR64LONG16 workspace; 173 174 INSIST(buffer != NULL); 175 INSIST(state != NULL); 176 177 block = &workspace; 178 (void)memcpy(block, buffer, 64); 179 180 /* Copy context->state[] to working vars */ 181 a = state[0]; 182 b = state[1]; 183 c = state[2]; 184 d = state[3]; 185 e = state[4]; 186 187#ifdef __sparc_v9__ 188 do_R01(&a, &b, &c, &d, &e, block); 189 do_R2(&a, &b, &c, &d, &e, block); 190 do_R3(&a, &b, &c, &d, &e, block); 191 do_R4(&a, &b, &c, &d, &e, block); 192#else 193 /* 4 rounds of 20 operations each. Loop unrolled. */ 194 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); 195 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); 196 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); 197 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); 198 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); 199 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); 200 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); 201 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); 202 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); 203 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); 204 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); 205 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); 206 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); 207 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); 208 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); 209 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); 210 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); 211 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); 212 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); 213 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); 214#endif 215 216 /* Add the working vars back into context.state[] */ 217 state[0] += a; 218 state[1] += b; 219 state[2] += c; 220 state[3] += d; 221 state[4] += e; 222 223 /* Wipe variables */ 224 a = b = c = d = e = 0; 225} 226 227 228/*! 229 * isc_sha1_init - Initialize new context 230 */ 231void 232isc_sha1_init(isc_sha1_t *context) 233{ 234 INSIST(context != NULL); 235 236 /* SHA1 initialization constants */ 237 context->state[0] = 0x67452301; 238 context->state[1] = 0xEFCDAB89; 239 context->state[2] = 0x98BADCFE; 240 context->state[3] = 0x10325476; 241 context->state[4] = 0xC3D2E1F0; 242 context->count[0] = 0; 243 context->count[1] = 0; 244} 245 246void 247isc_sha1_invalidate(isc_sha1_t *context) { 248 memset(context, 0, sizeof(isc_sha1_t)); 249} 250 251/*! 252 * Run your data through this. 253 */ 254void 255isc_sha1_update(isc_sha1_t *context, const unsigned char *data, 256 unsigned int len) 257{ 258 unsigned int i, j; 259 260 INSIST(context != 0); 261 INSIST(data != 0); 262 263 j = context->count[0]; 264 if ((context->count[0] += len << 3) < j) 265 context->count[1] += (len >> 29) + 1; 266 j = (j >> 3) & 63; 267 if ((j + len) > 63) { 268 (void)memcpy(&context->buffer[j], data, (i = 64 - j)); 269 transform(context->state, context->buffer); 270 for (; i + 63 < len; i += 64) 271 transform(context->state, &data[i]); 272 j = 0; 273 } else { 274 i = 0; 275 } 276 277 (void)memcpy(&context->buffer[j], &data[i], len - i); 278} 279 280 281/*! 282 * Add padding and return the message digest. 283 */ 284 285static const unsigned char final_200 = 128; 286static const unsigned char final_0 = 0; 287 288void 289isc_sha1_final(isc_sha1_t *context, unsigned char *digest) { 290 unsigned int i; 291 unsigned char finalcount[8]; 292 293 INSIST(digest != 0); 294 INSIST(context != 0); 295 296 for (i = 0; i < 8; i++) { 297 /* Endian independent */ 298 finalcount[i] = (unsigned char) 299 ((context->count[(i >= 4 ? 0 : 1)] 300 >> ((3 - (i & 3)) * 8)) & 255); 301 } 302 303 isc_sha1_update(context, &final_200, 1); 304 while ((context->count[0] & 504) != 448) 305 isc_sha1_update(context, &final_0, 1); 306 /* The next Update should cause a transform() */ 307 isc_sha1_update(context, finalcount, 8); 308 309 if (digest) { 310 for (i = 0; i < 20; i++) 311 digest[i] = (unsigned char) 312 ((context->state[i >> 2] 313 >> ((3 - (i & 3)) * 8)) & 255); 314 } 315 316 memset(context, 0, sizeof(isc_sha1_t)); 317} 318