sha1.c revision 1.2
1 /* $NetBSD: sha1.c,v 1.2 2006/10/27 21:25:21 christos Exp $ */ 2 /* $OpenBSD: sha1.c,v 1.9 1997/07/23 21:12:32 kstailey Exp $ */ 3 4 /* 5 * SHA-1 in C 6 * By Steve Reid <steve (at) edmweb.com> 7 * 100% Public Domain 8 * 9 * Test Vectors (from FIPS PUB 180-1) 10 * "abc" 11 * A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D 12 * "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" 13 * 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1 14 * A million repetitions of "a" 15 * 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F 16 */ 17 18 #define SHA1HANDSOFF /* Copies data before messing with it. */ 19 20 #include <sys/cdefs.h> 21 22 #if defined(_KERNEL) || defined(_STANDALONE) 23 __KERNEL_RCSID(0, "$NetBSD: sha1.c,v 1.2 2006/10/27 21:25:21 christos Exp $"); 24 25 #include <lib/libkern/libkern.h> 26 27 #else 28 29 #if defined(LIBC_SCCS) && !defined(lint) 30 __RCSID("$NetBSD: sha1.c,v 1.2 2006/10/27 21:25:21 christos Exp $"); 31 #endif /* LIBC_SCCS and not lint */ 32 33 #include "namespace.h" 34 #include <assert.h> 35 #include <string.h> 36 37 #endif 38 39 #include <sys/types.h> 40 #include <sys/sha1.h> 41 42 43 #if HAVE_NBTOOL_CONFIG_H 44 #include "nbtool_config.h" 45 #endif 46 47 #if !HAVE_SHA1_H 48 49 #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) 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 BYTE_ORDER == LITTLE_ENDIAN 56 # define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \ 57 |(rol(block->l[i],8)&0x00FF00FF)) 58 #else 59 # define blk0(i) block->l[i] 60 #endif 61 #define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \ 62 ^block->l[(i+2)&15]^block->l[i&15],1)) 63 64 /* 65 * (R0+R1), R2, R3, R4 are the different operations (rounds) used in SHA1 66 */ 67 #define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30); 68 #define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30); 69 #define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30); 70 #define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30); 71 #define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30); 72 73 74 #if !defined(_KERNEL) && defined(__weak_alias) 75 __weak_alias(SHA1Transform,_SHA1Transform) 76 __weak_alias(SHA1Init,_SHA1Init) 77 __weak_alias(SHA1Update,_SHA1Update) 78 __weak_alias(SHA1Final,_SHA1Final) 79 #endif 80 81 typedef union { 82 u_char c[64]; 83 u_int l[16]; 84 } CHAR64LONG16; 85 86 /* old sparc64 gcc could not compile this */ 87 #undef SPARC64_GCC_WORKAROUND 88 #if defined(__sparc64__) && defined(__GNUC__) && __GNUC__ < 3 89 #define SPARC64_GCC_WORKAROUND 90 #endif 91 92 #ifdef SPARC64_GCC_WORKAROUND 93 void do_R01(u_int32_t *a, u_int32_t *b, u_int32_t *c, u_int32_t *d, u_int32_t *e, CHAR64LONG16 *); 94 void do_R2(u_int32_t *a, u_int32_t *b, u_int32_t *c, u_int32_t *d, u_int32_t *e, CHAR64LONG16 *); 95 void do_R3(u_int32_t *a, u_int32_t *b, u_int32_t *c, u_int32_t *d, u_int32_t *e, CHAR64LONG16 *); 96 void do_R4(u_int32_t *a, u_int32_t *b, u_int32_t *c, u_int32_t *d, u_int32_t *e, CHAR64LONG16 *); 97 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) 103 104 void 105 do_R01(u_int32_t *a, u_int32_t *b, u_int32_t *c, u_int32_t *d, u_int32_t *e, CHAR64LONG16 *block) 106 { 107 nR0(a,b,c,d,e, 0); nR0(e,a,b,c,d, 1); nR0(d,e,a,b,c, 2); nR0(c,d,e,a,b, 3); 108 nR0(b,c,d,e,a, 4); nR0(a,b,c,d,e, 5); nR0(e,a,b,c,d, 6); nR0(d,e,a,b,c, 7); 109 nR0(c,d,e,a,b, 8); nR0(b,c,d,e,a, 9); nR0(a,b,c,d,e,10); nR0(e,a,b,c,d,11); 110 nR0(d,e,a,b,c,12); nR0(c,d,e,a,b,13); nR0(b,c,d,e,a,14); nR0(a,b,c,d,e,15); 111 nR1(e,a,b,c,d,16); nR1(d,e,a,b,c,17); nR1(c,d,e,a,b,18); nR1(b,c,d,e,a,19); 112 } 113 114 void 115 do_R2(u_int32_t *a, u_int32_t *b, u_int32_t *c, u_int32_t *d, u_int32_t *e, CHAR64LONG16 *block) 116 { 117 nR2(a,b,c,d,e,20); nR2(e,a,b,c,d,21); nR2(d,e,a,b,c,22); nR2(c,d,e,a,b,23); 118 nR2(b,c,d,e,a,24); nR2(a,b,c,d,e,25); nR2(e,a,b,c,d,26); nR2(d,e,a,b,c,27); 119 nR2(c,d,e,a,b,28); nR2(b,c,d,e,a,29); nR2(a,b,c,d,e,30); nR2(e,a,b,c,d,31); 120 nR2(d,e,a,b,c,32); nR2(c,d,e,a,b,33); nR2(b,c,d,e,a,34); nR2(a,b,c,d,e,35); 121 nR2(e,a,b,c,d,36); nR2(d,e,a,b,c,37); nR2(c,d,e,a,b,38); nR2(b,c,d,e,a,39); 122 } 123 124 void 125 do_R3(u_int32_t *a, u_int32_t *b, u_int32_t *c, u_int32_t *d, u_int32_t *e, CHAR64LONG16 *block) 126 { 127 nR3(a,b,c,d,e,40); nR3(e,a,b,c,d,41); nR3(d,e,a,b,c,42); nR3(c,d,e,a,b,43); 128 nR3(b,c,d,e,a,44); nR3(a,b,c,d,e,45); nR3(e,a,b,c,d,46); nR3(d,e,a,b,c,47); 129 nR3(c,d,e,a,b,48); nR3(b,c,d,e,a,49); nR3(a,b,c,d,e,50); nR3(e,a,b,c,d,51); 130 nR3(d,e,a,b,c,52); nR3(c,d,e,a,b,53); nR3(b,c,d,e,a,54); nR3(a,b,c,d,e,55); 131 nR3(e,a,b,c,d,56); nR3(d,e,a,b,c,57); nR3(c,d,e,a,b,58); nR3(b,c,d,e,a,59); 132 } 133 134 void 135 do_R4(u_int32_t *a, u_int32_t *b, u_int32_t *c, u_int32_t *d, u_int32_t *e, CHAR64LONG16 *block) 136 { 137 nR4(a,b,c,d,e,60); nR4(e,a,b,c,d,61); nR4(d,e,a,b,c,62); nR4(c,d,e,a,b,63); 138 nR4(b,c,d,e,a,64); nR4(a,b,c,d,e,65); nR4(e,a,b,c,d,66); nR4(d,e,a,b,c,67); 139 nR4(c,d,e,a,b,68); nR4(b,c,d,e,a,69); nR4(a,b,c,d,e,70); nR4(e,a,b,c,d,71); 140 nR4(d,e,a,b,c,72); nR4(c,d,e,a,b,73); nR4(b,c,d,e,a,74); nR4(a,b,c,d,e,75); 141 nR4(e,a,b,c,d,76); nR4(d,e,a,b,c,77); nR4(c,d,e,a,b,78); nR4(b,c,d,e,a,79); 142 } 143 #endif 144 145 /* 146 * Hash a single 512-bit block. This is the core of the algorithm. 147 */ 148 void SHA1Transform(state, buffer) 149 u_int32_t state[5]; 150 const u_char buffer[64]; 151 { 152 u_int32_t a, b, c, d, e; 153 CHAR64LONG16 *block; 154 155 #ifdef SHA1HANDSOFF 156 CHAR64LONG16 workspace; 157 #endif 158 159 _DIAGASSERT(buffer != 0); 160 _DIAGASSERT(state != 0); 161 162 #ifdef SHA1HANDSOFF 163 block = &workspace; 164 (void)memcpy(block, buffer, 64); 165 #else 166 block = (CHAR64LONG16 *)(void *)buffer; 167 #endif 168 169 /* Copy context->state[] to working vars */ 170 a = state[0]; 171 b = state[1]; 172 c = state[2]; 173 d = state[3]; 174 e = state[4]; 175 176 #ifdef SPARC64_GCC_WORKAROUND 177 do_R01(&a, &b, &c, &d, &e, block); 178 do_R2(&a, &b, &c, &d, &e, block); 179 do_R3(&a, &b, &c, &d, &e, block); 180 do_R4(&a, &b, &c, &d, &e, block); 181 #else 182 /* 4 rounds of 20 operations each. Loop unrolled. */ 183 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); 184 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); 185 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); 186 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); 187 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); 188 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); 189 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); 190 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); 191 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); 192 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); 193 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); 194 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); 195 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); 196 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); 197 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); 198 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); 199 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); 200 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); 201 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); 202 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); 203 #endif 204 205 /* Add the working vars back into context.state[] */ 206 state[0] += a; 207 state[1] += b; 208 state[2] += c; 209 state[3] += d; 210 state[4] += e; 211 212 /* Wipe variables */ 213 a = b = c = d = e = 0; 214 } 215 216 217 /* 218 * SHA1Init - Initialize new context 219 */ 220 void SHA1Init(context) 221 SHA1_CTX *context; 222 { 223 224 _DIAGASSERT(context != 0); 225 226 /* SHA1 initialization constants */ 227 context->state[0] = 0x67452301; 228 context->state[1] = 0xEFCDAB89; 229 context->state[2] = 0x98BADCFE; 230 context->state[3] = 0x10325476; 231 context->state[4] = 0xC3D2E1F0; 232 context->count[0] = context->count[1] = 0; 233 } 234 235 236 /* 237 * Run your data through this. 238 */ 239 void SHA1Update(context, data, len) 240 SHA1_CTX *context; 241 const u_char *data; 242 u_int len; 243 { 244 u_int i, j; 245 246 _DIAGASSERT(context != 0); 247 _DIAGASSERT(data != 0); 248 249 j = context->count[0]; 250 if ((context->count[0] += len << 3) < j) 251 context->count[1] += (len>>29)+1; 252 j = (j >> 3) & 63; 253 if ((j + len) > 63) { 254 (void)memcpy(&context->buffer[j], data, (i = 64-j)); 255 SHA1Transform(context->state, context->buffer); 256 for ( ; i + 63 < len; i += 64) 257 SHA1Transform(context->state, &data[i]); 258 j = 0; 259 } else { 260 i = 0; 261 } 262 (void)memcpy(&context->buffer[j], &data[i], len - i); 263 } 264 265 266 /* 267 * Add padding and return the message digest. 268 */ 269 void SHA1Final(digest, context) 270 u_char digest[20]; 271 SHA1_CTX* context; 272 { 273 u_int i; 274 u_char finalcount[8]; 275 276 _DIAGASSERT(digest != 0); 277 _DIAGASSERT(context != 0); 278 279 for (i = 0; i < 8; i++) { 280 finalcount[i] = (u_char)((context->count[(i >= 4 ? 0 : 1)] 281 >> ((3-(i & 3)) * 8) ) & 255); /* Endian independent */ 282 } 283 SHA1Update(context, (const u_char *)"\200", 1); 284 while ((context->count[0] & 504) != 448) 285 SHA1Update(context, (const u_char *)"\0", 1); 286 SHA1Update(context, finalcount, 8); /* Should cause a SHA1Transform() */ 287 288 if (digest) { 289 for (i = 0; i < 20; i++) 290 digest[i] = (u_char) 291 ((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255); 292 } 293 } 294 295 #endif /* HAVE_SHA1_H */ 296
Indexes created Fri Oct 03 02:09:57 GMT 2025