1/* $NetBSD: sha1.c,v 1.7 2021/10/28 15:09:08 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@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 1.7 2021/10/28 15:09:08 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 1.7 2021/10/28 15:09:08 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(_STANDALONE) 75#if defined(__weak_alias) 76__weak_alias(SHA1Transform,_SHA1Transform) 77__weak_alias(SHA1Init,_SHA1Init) 78__weak_alias(SHA1Update,_SHA1Update) 79__weak_alias(SHA1Final,_SHA1Final) 80#endif 81#endif 82 83typedef union { 84 uint8_t c[64]; 85 uint32_t l[16]; 86} CHAR64LONG16; 87 88/* old sparc64 gcc could not compile this */ 89#undef SPARC64_GCC_WORKAROUND 90#if defined(__sparc64__) && defined(__GNUC__) && __GNUC__ < 3 91#define SPARC64_GCC_WORKAROUND 92#endif 93 94#ifdef SPARC64_GCC_WORKAROUND 95void do_R01(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d, uint32_t *e, CHAR64LONG16 *); 96void do_R2(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d, uint32_t *e, CHAR64LONG16 *); 97void do_R3(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d, uint32_t *e, CHAR64LONG16 *); 98void do_R4(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d, uint32_t *e, CHAR64LONG16 *); 99 100#define nR0(v,w,x,y,z,i) R0(*v,*w,*x,*y,*z,i) 101#define nR1(v,w,x,y,z,i) R1(*v,*w,*x,*y,*z,i) 102#define nR2(v,w,x,y,z,i) R2(*v,*w,*x,*y,*z,i) 103#define nR3(v,w,x,y,z,i) R3(*v,*w,*x,*y,*z,i) 104#define nR4(v,w,x,y,z,i) R4(*v,*w,*x,*y,*z,i) 105 106void 107do_R01(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d, uint32_t *e, CHAR64LONG16 *block) 108{ 109 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); 110 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); 111 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); 112 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); 113 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); 114} 115 116void 117do_R2(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d, uint32_t *e, CHAR64LONG16 *block) 118{ 119 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); 120 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); 121 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); 122 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); 123 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); 124} 125 126void 127do_R3(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d, uint32_t *e, CHAR64LONG16 *block) 128{ 129 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); 130 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); 131 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); 132 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); 133 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); 134} 135 136void 137do_R4(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d, uint32_t *e, CHAR64LONG16 *block) 138{ 139 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); 140 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); 141 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); 142 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); 143 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); 144} 145#endif 146 147/* 148 * Hash a single 512-bit block. This is the core of the algorithm. 149 */ 150void SHA1Transform(uint32_t state[5], const uint8_t buffer[64]) 151{ 152 uint32_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 */ 220void SHA1Init(SHA1_CTX *context) 221{ 222 223 _DIAGASSERT(context != 0); 224 225 /* SHA1 initialization constants */ 226 context->state[0] = 0x67452301; 227 context->state[1] = 0xEFCDAB89; 228 context->state[2] = 0x98BADCFE; 229 context->state[3] = 0x10325476; 230 context->state[4] = 0xC3D2E1F0; 231 context->count[0] = context->count[1] = 0; 232} 233 234 235/* 236 * Run your data through this. 237 */ 238void SHA1Update(SHA1_CTX *context, const uint8_t *data, unsigned int len) 239{ 240 unsigned int i, j; 241 242 _DIAGASSERT(context != 0); 243 _DIAGASSERT(data != 0); 244 245 j = context->count[0]; 246 if ((context->count[0] += len << 3) < j) 247 context->count[1] += (len>>29)+1; 248 j = (j >> 3) & 63; 249 if ((j + len) > 63) { 250 (void)memcpy(&context->buffer[j], data, (i = 64-j)); 251 SHA1Transform(context->state, context->buffer); 252 for ( ; i + 63 < len; i += 64) 253 SHA1Transform(context->state, &data[i]); 254 j = 0; 255 } else { 256 i = 0; 257 } 258 (void)memcpy(&context->buffer[j], &data[i], len - i); 259} 260 261 262/* 263 * Add padding and return the message digest. 264 */ 265void SHA1Final(uint8_t digest[SHA1_DIGEST_LENGTH], SHA1_CTX *context) 266{ 267 unsigned int i; 268 uint8_t finalcount[8]; 269 270 _DIAGASSERT(digest != 0); 271 _DIAGASSERT(context != 0); 272 273 for (i = 0; i < 8; i++) { 274 finalcount[i] = (uint8_t)((context->count[(i >= 4 ? 0 : 1)] 275 >> ((3-(i & 3)) * 8) ) & 255); /* Endian independent */ 276 } 277 SHA1Update(context, (const uint8_t *)"\200", 1); 278 while ((context->count[0] & 504) != 448) 279 SHA1Update(context, (const uint8_t *)"\0", 1); 280 SHA1Update(context, finalcount, 8); /* Should cause a SHA1Transform() */ 281 282 if (digest) { 283 for (i = 0; i < 20; i++) 284 digest[i] = (uint8_t) 285 ((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255); 286 } 287} 288 289#endif /* HAVE_SHA1_H */ 290