common/lib/libc/hash/sha1/sha1.c

   1 /*      $NetBSD: sha1.c,v 1.6 2009/11/06 20:31:18 joerg 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 1.6 2009/11/06 20:31:18 joerg 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 1.6 2009/11/06 20:31:18 joerg 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
  83 typedef 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
  95 void do_R01(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d, uint32_t *e, CHAR64LONG16 *);
  96 void do_R2(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d, uint32_t *e, CHAR64LONG16 *);
  97 void do_R3(uint32_t *a, uint32_t *b, uint32_t *c, uint32_t *d, uint32_t *e, CHAR64LONG16 *);
  98 void 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
 106 void
 107 do_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
 116 void
 117 do_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
 126 void
 127 do_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
 136 void
 137 do_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  */
 150 void 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  */
 220 void 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  */
 238 void 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  */
 265 void SHA1Final(uint8_t digest[20], 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 */