| 1 |
twoaday |
2 |
/* sha1.c - SHA1 hash function |
| 2 |
|
|
* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc. |
| 3 |
|
|
* |
| 4 |
|
|
* Please see below for more legal information! |
| 5 |
|
|
* |
| 6 |
|
|
* This file is part of GnuPG. |
| 7 |
|
|
* |
| 8 |
|
|
* GnuPG is free software; you can redistribute it and/or modify |
| 9 |
|
|
* it under the terms of the GNU General Public License as published by |
| 10 |
|
|
* the Free Software Foundation; either version 2 of the License, or |
| 11 |
|
|
* (at your option) any later version. |
| 12 |
|
|
* |
| 13 |
|
|
* GnuPG is distributed in the hope that it will be useful, |
| 14 |
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 |
|
|
* GNU General Public License for more details. |
| 17 |
|
|
* |
| 18 |
|
|
* You should have received a copy of the GNU General Public License |
| 19 |
|
|
* along with this program; if not, write to the Free Software |
| 20 |
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
| 21 |
|
|
*/ |
| 22 |
|
|
|
| 23 |
|
|
|
| 24 |
|
|
/* Test vectors: |
| 25 |
|
|
* |
| 26 |
|
|
* "abc" |
| 27 |
|
|
* A999 3E36 4706 816A BA3E 2571 7850 C26C 9CD0 D89D |
| 28 |
|
|
* |
| 29 |
|
|
* "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" |
| 30 |
|
|
* 8498 3E44 1C3B D26E BAAE 4AA1 F951 29E5 E546 70F1 |
| 31 |
|
|
*/ |
| 32 |
|
|
|
| 33 |
|
|
|
| 34 |
|
|
#include <stdio.h> |
| 35 |
|
|
#include <stdlib.h> |
| 36 |
|
|
#include <string.h> |
| 37 |
|
|
#include <assert.h> |
| 38 |
|
|
|
| 39 |
|
|
#include "md.h" |
| 40 |
|
|
|
| 41 |
|
|
static void |
| 42 |
|
|
burn_stack (int bytes) |
| 43 |
|
|
{ |
| 44 |
|
|
char buf[128]; |
| 45 |
|
|
|
| 46 |
|
|
memset(buf, 0, sizeof buf); |
| 47 |
|
|
bytes -= sizeof buf; |
| 48 |
|
|
if (bytes > 0) |
| 49 |
|
|
burn_stack (bytes); |
| 50 |
|
|
} |
| 51 |
|
|
|
| 52 |
|
|
|
| 53 |
|
|
void |
| 54 |
|
|
sha1_init( SHA1_CONTEXT *hd ) |
| 55 |
|
|
{ |
| 56 |
|
|
hd->h0 = 0x67452301; |
| 57 |
|
|
hd->h1 = 0xefcdab89; |
| 58 |
|
|
hd->h2 = 0x98badcfe; |
| 59 |
|
|
hd->h3 = 0x10325476; |
| 60 |
|
|
hd->h4 = 0xc3d2e1f0; |
| 61 |
|
|
hd->nblocks = 0; |
| 62 |
|
|
hd->count = 0; |
| 63 |
|
|
} |
| 64 |
|
|
|
| 65 |
|
|
|
| 66 |
|
|
/**************** |
| 67 |
|
|
* Transform the message X which consists of 16 32-bit-words |
| 68 |
|
|
*/ |
| 69 |
|
|
static void |
| 70 |
|
|
transform( SHA1_CONTEXT *hd, unsigned char *data ) |
| 71 |
|
|
{ |
| 72 |
|
|
unsigned long a,b,c,d,e,tm; |
| 73 |
|
|
unsigned long x[16]; |
| 74 |
|
|
|
| 75 |
|
|
/* get values from the chaining vars */ |
| 76 |
|
|
a = hd->h0; |
| 77 |
|
|
b = hd->h1; |
| 78 |
|
|
c = hd->h2; |
| 79 |
|
|
d = hd->h3; |
| 80 |
|
|
e = hd->h4; |
| 81 |
|
|
|
| 82 |
|
|
#ifdef BIG_ENDIAN_HOST |
| 83 |
|
|
memcpy( x, data, 64 ); |
| 84 |
|
|
#else |
| 85 |
|
|
{ int i; |
| 86 |
|
|
unsigned char *p2; |
| 87 |
|
|
for(i=0, p2=(unsigned char*)x; i < 16; i++, p2 += 4 ) { |
| 88 |
|
|
p2[3] = *data++; |
| 89 |
|
|
p2[2] = *data++; |
| 90 |
|
|
p2[1] = *data++; |
| 91 |
|
|
p2[0] = *data++; |
| 92 |
|
|
} |
| 93 |
|
|
} |
| 94 |
|
|
#endif |
| 95 |
|
|
|
| 96 |
|
|
|
| 97 |
|
|
#define K1 0x5A827999L |
| 98 |
|
|
#define K2 0x6ED9EBA1L |
| 99 |
|
|
#define K3 0x8F1BBCDCL |
| 100 |
|
|
#define K4 0xCA62C1D6L |
| 101 |
|
|
#define F1(x,y,z) ( z ^ ( x & ( y ^ z ) ) ) |
| 102 |
|
|
#define F2(x,y,z) ( x ^ y ^ z ) |
| 103 |
|
|
#define F3(x,y,z) ( ( x & y ) | ( z & ( x | y ) ) ) |
| 104 |
|
|
#define F4(x,y,z) ( x ^ y ^ z ) |
| 105 |
|
|
|
| 106 |
|
|
|
| 107 |
|
|
#define M(i) ( tm = x[i&0x0f] ^ x[(i-14)&0x0f] \ |
| 108 |
|
|
^ x[(i-8)&0x0f] ^ x[(i-3)&0x0f] \ |
| 109 |
|
|
, (x[i&0x0f] = rol(tm,1)) ) |
| 110 |
|
|
|
| 111 |
|
|
#define R(a,b,c,d,e,f,k,m) do { e += rol( a, 5 ) \ |
| 112 |
|
|
+ f( b, c, d ) \ |
| 113 |
|
|
+ k \ |
| 114 |
|
|
+ m; \ |
| 115 |
|
|
b = rol( b, 30 ); \ |
| 116 |
|
|
} while(0) |
| 117 |
|
|
R( a, b, c, d, e, F1, K1, x[ 0] ); |
| 118 |
|
|
R( e, a, b, c, d, F1, K1, x[ 1] ); |
| 119 |
|
|
R( d, e, a, b, c, F1, K1, x[ 2] ); |
| 120 |
|
|
R( c, d, e, a, b, F1, K1, x[ 3] ); |
| 121 |
|
|
R( b, c, d, e, a, F1, K1, x[ 4] ); |
| 122 |
|
|
R( a, b, c, d, e, F1, K1, x[ 5] ); |
| 123 |
|
|
R( e, a, b, c, d, F1, K1, x[ 6] ); |
| 124 |
|
|
R( d, e, a, b, c, F1, K1, x[ 7] ); |
| 125 |
|
|
R( c, d, e, a, b, F1, K1, x[ 8] ); |
| 126 |
|
|
R( b, c, d, e, a, F1, K1, x[ 9] ); |
| 127 |
|
|
R( a, b, c, d, e, F1, K1, x[10] ); |
| 128 |
|
|
R( e, a, b, c, d, F1, K1, x[11] ); |
| 129 |
|
|
R( d, e, a, b, c, F1, K1, x[12] ); |
| 130 |
|
|
R( c, d, e, a, b, F1, K1, x[13] ); |
| 131 |
|
|
R( b, c, d, e, a, F1, K1, x[14] ); |
| 132 |
|
|
R( a, b, c, d, e, F1, K1, x[15] ); |
| 133 |
|
|
R( e, a, b, c, d, F1, K1, M(16) ); |
| 134 |
|
|
R( d, e, a, b, c, F1, K1, M(17) ); |
| 135 |
|
|
R( c, d, e, a, b, F1, K1, M(18) ); |
| 136 |
|
|
R( b, c, d, e, a, F1, K1, M(19) ); |
| 137 |
|
|
R( a, b, c, d, e, F2, K2, M(20) ); |
| 138 |
|
|
R( e, a, b, c, d, F2, K2, M(21) ); |
| 139 |
|
|
R( d, e, a, b, c, F2, K2, M(22) ); |
| 140 |
|
|
R( c, d, e, a, b, F2, K2, M(23) ); |
| 141 |
|
|
R( b, c, d, e, a, F2, K2, M(24) ); |
| 142 |
|
|
R( a, b, c, d, e, F2, K2, M(25) ); |
| 143 |
|
|
R( e, a, b, c, d, F2, K2, M(26) ); |
| 144 |
|
|
R( d, e, a, b, c, F2, K2, M(27) ); |
| 145 |
|
|
R( c, d, e, a, b, F2, K2, M(28) ); |
| 146 |
|
|
R( b, c, d, e, a, F2, K2, M(29) ); |
| 147 |
|
|
R( a, b, c, d, e, F2, K2, M(30) ); |
| 148 |
|
|
R( e, a, b, c, d, F2, K2, M(31) ); |
| 149 |
|
|
R( d, e, a, b, c, F2, K2, M(32) ); |
| 150 |
|
|
R( c, d, e, a, b, F2, K2, M(33) ); |
| 151 |
|
|
R( b, c, d, e, a, F2, K2, M(34) ); |
| 152 |
|
|
R( a, b, c, d, e, F2, K2, M(35) ); |
| 153 |
|
|
R( e, a, b, c, d, F2, K2, M(36) ); |
| 154 |
|
|
R( d, e, a, b, c, F2, K2, M(37) ); |
| 155 |
|
|
R( c, d, e, a, b, F2, K2, M(38) ); |
| 156 |
|
|
R( b, c, d, e, a, F2, K2, M(39) ); |
| 157 |
|
|
R( a, b, c, d, e, F3, K3, M(40) ); |
| 158 |
|
|
R( e, a, b, c, d, F3, K3, M(41) ); |
| 159 |
|
|
R( d, e, a, b, c, F3, K3, M(42) ); |
| 160 |
|
|
R( c, d, e, a, b, F3, K3, M(43) ); |
| 161 |
|
|
R( b, c, d, e, a, F3, K3, M(44) ); |
| 162 |
|
|
R( a, b, c, d, e, F3, K3, M(45) ); |
| 163 |
|
|
R( e, a, b, c, d, F3, K3, M(46) ); |
| 164 |
|
|
R( d, e, a, b, c, F3, K3, M(47) ); |
| 165 |
|
|
R( c, d, e, a, b, F3, K3, M(48) ); |
| 166 |
|
|
R( b, c, d, e, a, F3, K3, M(49) ); |
| 167 |
|
|
R( a, b, c, d, e, F3, K3, M(50) ); |
| 168 |
|
|
R( e, a, b, c, d, F3, K3, M(51) ); |
| 169 |
|
|
R( d, e, a, b, c, F3, K3, M(52) ); |
| 170 |
|
|
R( c, d, e, a, b, F3, K3, M(53) ); |
| 171 |
|
|
R( b, c, d, e, a, F3, K3, M(54) ); |
| 172 |
|
|
R( a, b, c, d, e, F3, K3, M(55) ); |
| 173 |
|
|
R( e, a, b, c, d, F3, K3, M(56) ); |
| 174 |
|
|
R( d, e, a, b, c, F3, K3, M(57) ); |
| 175 |
|
|
R( c, d, e, a, b, F3, K3, M(58) ); |
| 176 |
|
|
R( b, c, d, e, a, F3, K3, M(59) ); |
| 177 |
|
|
R( a, b, c, d, e, F4, K4, M(60) ); |
| 178 |
|
|
R( e, a, b, c, d, F4, K4, M(61) ); |
| 179 |
|
|
R( d, e, a, b, c, F4, K4, M(62) ); |
| 180 |
|
|
R( c, d, e, a, b, F4, K4, M(63) ); |
| 181 |
|
|
R( b, c, d, e, a, F4, K4, M(64) ); |
| 182 |
|
|
R( a, b, c, d, e, F4, K4, M(65) ); |
| 183 |
|
|
R( e, a, b, c, d, F4, K4, M(66) ); |
| 184 |
|
|
R( d, e, a, b, c, F4, K4, M(67) ); |
| 185 |
|
|
R( c, d, e, a, b, F4, K4, M(68) ); |
| 186 |
|
|
R( b, c, d, e, a, F4, K4, M(69) ); |
| 187 |
|
|
R( a, b, c, d, e, F4, K4, M(70) ); |
| 188 |
|
|
R( e, a, b, c, d, F4, K4, M(71) ); |
| 189 |
|
|
R( d, e, a, b, c, F4, K4, M(72) ); |
| 190 |
|
|
R( c, d, e, a, b, F4, K4, M(73) ); |
| 191 |
|
|
R( b, c, d, e, a, F4, K4, M(74) ); |
| 192 |
|
|
R( a, b, c, d, e, F4, K4, M(75) ); |
| 193 |
|
|
R( e, a, b, c, d, F4, K4, M(76) ); |
| 194 |
|
|
R( d, e, a, b, c, F4, K4, M(77) ); |
| 195 |
|
|
R( c, d, e, a, b, F4, K4, M(78) ); |
| 196 |
|
|
R( b, c, d, e, a, F4, K4, M(79) ); |
| 197 |
|
|
|
| 198 |
|
|
/* update chainig vars */ |
| 199 |
|
|
hd->h0 += a; |
| 200 |
|
|
hd->h1 += b; |
| 201 |
|
|
hd->h2 += c; |
| 202 |
|
|
hd->h3 += d; |
| 203 |
|
|
hd->h4 += e; |
| 204 |
|
|
} |
| 205 |
|
|
|
| 206 |
|
|
|
| 207 |
|
|
/* Update the message digest with the contents |
| 208 |
|
|
* of INBUF with length INLEN. |
| 209 |
|
|
*/ |
| 210 |
|
|
void |
| 211 |
|
|
sha1_write( SHA1_CONTEXT *hd, unsigned char *inbuf, size_t inlen) |
| 212 |
|
|
{ |
| 213 |
|
|
if( hd->count == 64 ) { /* flush the buffer */ |
| 214 |
|
|
transform( hd, hd->buf ); |
| 215 |
|
|
burn_stack (88+4*sizeof(void*)); |
| 216 |
|
|
hd->count = 0; |
| 217 |
|
|
hd->nblocks++; |
| 218 |
|
|
} |
| 219 |
|
|
if( !inbuf ) |
| 220 |
|
|
return; |
| 221 |
|
|
if( hd->count ) { |
| 222 |
|
|
for( ; inlen && hd->count < 64; inlen-- ) |
| 223 |
|
|
hd->buf[hd->count++] = *inbuf++; |
| 224 |
|
|
sha1_write( hd, NULL, 0 ); |
| 225 |
|
|
if( !inlen ) |
| 226 |
|
|
return; |
| 227 |
|
|
} |
| 228 |
|
|
|
| 229 |
|
|
while( inlen >= 64 ) { |
| 230 |
|
|
transform( hd, inbuf ); |
| 231 |
|
|
hd->count = 0; |
| 232 |
|
|
hd->nblocks++; |
| 233 |
|
|
inlen -= 64; |
| 234 |
|
|
inbuf += 64; |
| 235 |
|
|
} |
| 236 |
|
|
burn_stack (88+4*sizeof(void*)); |
| 237 |
|
|
for( ; inlen && hd->count < 64; inlen-- ) |
| 238 |
|
|
hd->buf[hd->count++] = *inbuf++; |
| 239 |
|
|
} |
| 240 |
|
|
|
| 241 |
|
|
|
| 242 |
|
|
/* The routine final terminates the computation and |
| 243 |
|
|
* returns the digest. |
| 244 |
|
|
* The handle is prepared for a new cycle, but adding bytes to the |
| 245 |
|
|
* handle will the destroy the returned buffer. |
| 246 |
|
|
* Returns: 20 bytes representing the digest. |
| 247 |
|
|
*/ |
| 248 |
|
|
|
| 249 |
|
|
void |
| 250 |
|
|
sha1_final(SHA1_CONTEXT *hd) |
| 251 |
|
|
{ |
| 252 |
|
|
unsigned long t, msb, lsb; |
| 253 |
|
|
unsigned char *p; |
| 254 |
|
|
|
| 255 |
|
|
sha1_write(hd, NULL, 0); /* flush */; |
| 256 |
|
|
|
| 257 |
|
|
t = hd->nblocks; |
| 258 |
|
|
/* multiply by 64 to make a byte count */ |
| 259 |
|
|
lsb = t << 6; |
| 260 |
|
|
msb = t >> 26; |
| 261 |
|
|
/* add the count */ |
| 262 |
|
|
t = lsb; |
| 263 |
|
|
if( (lsb += hd->count) < t ) |
| 264 |
|
|
msb++; |
| 265 |
|
|
/* multiply by 8 to make a bit count */ |
| 266 |
|
|
t = lsb; |
| 267 |
|
|
lsb <<= 3; |
| 268 |
|
|
msb <<= 3; |
| 269 |
|
|
msb |= t >> 29; |
| 270 |
|
|
|
| 271 |
|
|
if( hd->count < 56 ) { /* enough room */ |
| 272 |
|
|
hd->buf[hd->count++] = 0x80; /* pad */ |
| 273 |
|
|
while( hd->count < 56 ) |
| 274 |
|
|
hd->buf[hd->count++] = 0; /* pad */ |
| 275 |
|
|
} |
| 276 |
|
|
else { /* need one extra block */ |
| 277 |
|
|
hd->buf[hd->count++] = 0x80; /* pad character */ |
| 278 |
|
|
while( hd->count < 64 ) |
| 279 |
|
|
hd->buf[hd->count++] = 0; |
| 280 |
|
|
sha1_write(hd, NULL, 0); /* flush */; |
| 281 |
|
|
memset(hd->buf, 0, 56 ); /* fill next block with zeroes */ |
| 282 |
|
|
} |
| 283 |
|
|
/* append the 64 bit count */ |
| 284 |
|
|
hd->buf[56] = msb >> 24; |
| 285 |
|
|
hd->buf[57] = msb >> 16; |
| 286 |
|
|
hd->buf[58] = msb >> 8; |
| 287 |
|
|
hd->buf[59] = msb ; |
| 288 |
|
|
hd->buf[60] = lsb >> 24; |
| 289 |
|
|
hd->buf[61] = lsb >> 16; |
| 290 |
|
|
hd->buf[62] = lsb >> 8; |
| 291 |
|
|
hd->buf[63] = lsb ; |
| 292 |
|
|
transform( hd, hd->buf ); |
| 293 |
|
|
burn_stack (88+4*sizeof(void*)); |
| 294 |
|
|
|
| 295 |
|
|
p = hd->buf; |
| 296 |
|
|
#ifdef BIG_ENDIAN_HOST |
| 297 |
|
|
#define X(a) do { *(unsigned long*)p = hd->h##a ; p += 4; } while(0) |
| 298 |
|
|
#else /* little endian */ |
| 299 |
|
|
#define X(a) do { *p++ = hd->h##a >> 24; *p++ = hd->h##a >> 16; \ |
| 300 |
|
|
*p++ = hd->h##a >> 8; *p++ = hd->h##a; } while(0) |
| 301 |
|
|
#endif |
| 302 |
|
|
X(0); |
| 303 |
|
|
X(1); |
| 304 |
|
|
X(2); |
| 305 |
|
|
X(3); |
| 306 |
|
|
X(4); |
| 307 |
|
|
#undef X |
| 308 |
|
|
|
| 309 |
|
|
} |
| 310 |
|
|
|
| 311 |
|
|
unsigned char * |
| 312 |
|
|
sha1_read( SHA1_CONTEXT *hd ) |
| 313 |
|
|
{ |
| 314 |
|
|
return hd->buf; |
| 315 |
|
|
} |
| 316 |
|
|
|
Parent Directory
| 
Revision Log