1 /* crypto/sha/sha1dgst.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the routines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <sys/cdefs.h> 60 #include <sys/types.h> 61 62 #include <stdio.h> 63 #include <string.h> 64 65 #if 0 66 #include <machine/ansi.h> /* we use the __ variants of bit-sized types */ 67 #endif 68 #include <machine/endian.h> 69 70 #undef SHA_0 71 #define SHA_1 72 #include "sha.h" 73 #include "sha_locl.h" 74 75 /* 76 * The assembly-language code is not position-independent, so don't 77 * try to use it in a shared library. 78 */ 79 #ifdef PIC 80 #undef SHA1_ASM 81 #endif 82 83 char *SHA1_version="SHA1 part of SSLeay 0.9.0b 11-Oct-1998"; 84 85 /* Implemented from SHA-1 document - The Secure Hash Algorithm 86 */ 87 88 #define INIT_DATA_h0 (unsigned long)0x67452301L 89 #define INIT_DATA_h1 (unsigned long)0xefcdab89L 90 #define INIT_DATA_h2 (unsigned long)0x98badcfeL 91 #define INIT_DATA_h3 (unsigned long)0x10325476L 92 #define INIT_DATA_h4 (unsigned long)0xc3d2e1f0L 93 94 #define K_00_19 0x5a827999L 95 #define K_20_39 0x6ed9eba1L 96 #define K_40_59 0x8f1bbcdcL 97 #define K_60_79 0xca62c1d6L 98 99 #ifndef NOPROTO 100 # ifdef SHA1_ASM 101 void sha1_block_x86(SHA_CTX *c, const u_int32_t *p, int num); 102 # define sha1_block sha1_block_x86 103 # else 104 void sha1_block(SHA_CTX *c, const u_int32_t *p, int num); 105 # endif 106 #else 107 # ifdef SHA1_ASM 108 void sha1_block_x86(); 109 # define sha1_block sha1_block_x86 110 # else 111 void sha1_block(); 112 # endif 113 #endif 114 115 116 #if BYTE_ORDER == LITTLE_ENDIAN && defined(SHA1_ASM) 117 # define M_c2nl c2l 118 # define M_p_c2nl p_c2l 119 # define M_c2nl_p c2l_p 120 # define M_p_c2nl_p p_c2l_p 121 # define M_nl2c l2c 122 #else 123 # define M_c2nl c2nl 124 # define M_p_c2nl p_c2nl 125 # define M_c2nl_p c2nl_p 126 # define M_p_c2nl_p p_c2nl_p 127 # define M_nl2c nl2c 128 #endif 129 130 void SHA1_Init(SHA_CTX *c) 131 { 132 c->h0=INIT_DATA_h0; 133 c->h1=INIT_DATA_h1; 134 c->h2=INIT_DATA_h2; 135 c->h3=INIT_DATA_h3; 136 c->h4=INIT_DATA_h4; 137 c->Nl=0; 138 c->Nh=0; 139 c->num=0; 140 } 141 142 void 143 SHA1_Update(SHA_CTX *c, const void *in, size_t len) 144 { 145 u_int32_t *p; 146 int ew,ec,sw,sc; 147 u_int32_t l; 148 const unsigned char *data = in; 149 150 if (len == 0) return; 151 152 l=(c->Nl+(len<<3))&0xffffffffL; 153 if (l < c->Nl) /* overflow */ 154 c->Nh++; 155 c->Nh+=(len>>29); 156 c->Nl=l; 157 158 if (c->num != 0) 159 { 160 p=c->data; 161 sw=c->num>>2; 162 sc=c->num&0x03; 163 164 if ((c->num+len) >= SHA_CBLOCK) 165 { 166 l= p[sw]; 167 M_p_c2nl(data,l,sc); 168 p[sw++]=l; 169 for (; sw<SHA_LBLOCK; sw++) 170 { 171 M_c2nl(data,l); 172 p[sw]=l; 173 } 174 len-=(SHA_CBLOCK-c->num); 175 176 sha1_block(c,p,64); 177 c->num=0; 178 /* drop through and do the rest */ 179 } 180 else 181 { 182 c->num+=(int)len; 183 if ((sc+len) < 4) /* ugly, add char's to a word */ 184 { 185 l= p[sw]; 186 M_p_c2nl_p(data,l,sc,len); 187 p[sw]=l; 188 } 189 else 190 { 191 ew=(c->num>>2); 192 ec=(c->num&0x03); 193 l= p[sw]; 194 M_p_c2nl(data,l,sc); 195 p[sw++]=l; 196 for (; sw < ew; sw++) 197 { M_c2nl(data,l); p[sw]=l; } 198 if (ec) 199 { 200 M_c2nl_p(data,l,ec); 201 p[sw]=l; 202 } 203 } 204 return; 205 } 206 } 207 /* We can only do the following code for assember, the reason 208 * being that the sha1_block 'C' version changes the values 209 * in the 'data' array. The assember code avoids this and 210 * copies it to a local array. I should be able to do this for 211 * the C version as well.... 212 */ 213 #if 1 214 #if BYTE_ORDER == BIG_ENDIAN || defined(SHA1_ASM) 215 if ((((unsigned int)data)%sizeof(u_int32_t)) == 0) 216 { 217 sw=len/SHA_CBLOCK; 218 if (sw) 219 { 220 sw*=SHA_CBLOCK; 221 sha1_block(c,(u_int32_t *)data,sw); 222 data+=sw; 223 len-=sw; 224 } 225 } 226 #endif 227 #endif 228 /* we now can process the input data in blocks of SHA_CBLOCK 229 * chars and save the leftovers to c->data. */ 230 p=c->data; 231 while (len >= SHA_CBLOCK) 232 { 233 #if BYTE_ORDER == BIG_ENDIAN || BYTE_ORDER == LITTLE_ENDIAN 234 if (p != (u_int32_t *)data) 235 memcpy(p,data,SHA_CBLOCK); 236 data+=SHA_CBLOCK; 237 # if BYTE_ORDER == LITTLE_ENDIAN 238 # ifndef SHA1_ASM /* Will not happen */ 239 for (sw=(SHA_LBLOCK/4); sw; sw--) 240 { 241 Endian_Reverse32(p[0]); 242 Endian_Reverse32(p[1]); 243 Endian_Reverse32(p[2]); 244 Endian_Reverse32(p[3]); 245 p+=4; 246 } 247 p=c->data; 248 # endif 249 # endif 250 #else 251 for (sw=(SHA_BLOCK/4); sw; sw--) 252 { 253 M_c2nl(data,l); *(p++)=l; 254 M_c2nl(data,l); *(p++)=l; 255 M_c2nl(data,l); *(p++)=l; 256 M_c2nl(data,l); *(p++)=l; 257 } 258 p=c->data; 259 #endif 260 sha1_block(c,p,64); 261 len-=SHA_CBLOCK; 262 } 263 ec=(int)len; 264 c->num=ec; 265 ew=(ec>>2); 266 ec&=0x03; 267 268 for (sw=0; sw < ew; sw++) 269 { M_c2nl(data,l); p[sw]=l; } 270 M_c2nl_p(data,l,ec); 271 p[sw]=l; 272 } 273 274 void SHA1_Transform(SHA_CTX *c, unsigned char *b) 275 { 276 u_int32_t p[16]; 277 #if BYTE_ORDER != BIG_ENDIAN 278 u_int32_t *q; 279 int i; 280 #endif 281 282 #if BYTE_ORDER == BIG_ENDIAN || BYTE_ORDER == LITTLE_ENDIAN 283 memcpy(p,b,64); 284 #if BYTE_ORDER == LITTLE_ENDIAN 285 q=p; 286 for (i=(SHA_LBLOCK/4); i; i--) 287 { 288 Endian_Reverse32(q[0]); 289 Endian_Reverse32(q[1]); 290 Endian_Reverse32(q[2]); 291 Endian_Reverse32(q[3]); 292 q+=4; 293 } 294 #endif 295 #else 296 q=p; 297 for (i=(SHA_LBLOCK/4); i; i--) 298 { 299 u_int32_t l; 300 c2nl(b,l); *(q++)=l; 301 c2nl(b,l); *(q++)=l; 302 c2nl(b,l); *(q++)=l; 303 c2nl(b,l); *(q++)=l; 304 } 305 #endif 306 sha1_block(c,p,64); 307 } 308 309 #ifndef SHA1_ASM 310 311 void 312 sha1_block(SHA_CTX *c, const u_int32_t *W, int num) 313 { 314 u_int32_t A,B,C,D,E,T; 315 u_int32_t X[16]; 316 317 A=c->h0; 318 B=c->h1; 319 C=c->h2; 320 D=c->h3; 321 E=c->h4; 322 323 for (;;) 324 { 325 BODY_00_15( 0,A,B,C,D,E,T,W); 326 BODY_00_15( 1,T,A,B,C,D,E,W); 327 BODY_00_15( 2,E,T,A,B,C,D,W); 328 BODY_00_15( 3,D,E,T,A,B,C,W); 329 BODY_00_15( 4,C,D,E,T,A,B,W); 330 BODY_00_15( 5,B,C,D,E,T,A,W); 331 BODY_00_15( 6,A,B,C,D,E,T,W); 332 BODY_00_15( 7,T,A,B,C,D,E,W); 333 BODY_00_15( 8,E,T,A,B,C,D,W); 334 BODY_00_15( 9,D,E,T,A,B,C,W); 335 BODY_00_15(10,C,D,E,T,A,B,W); 336 BODY_00_15(11,B,C,D,E,T,A,W); 337 BODY_00_15(12,A,B,C,D,E,T,W); 338 BODY_00_15(13,T,A,B,C,D,E,W); 339 BODY_00_15(14,E,T,A,B,C,D,W); 340 BODY_00_15(15,D,E,T,A,B,C,W); 341 BODY_16_19(16,C,D,E,T,A,B,W,W,W,W); 342 BODY_16_19(17,B,C,D,E,T,A,W,W,W,W); 343 BODY_16_19(18,A,B,C,D,E,T,W,W,W,W); 344 BODY_16_19(19,T,A,B,C,D,E,W,W,W,X); 345 346 BODY_20_31(20,E,T,A,B,C,D,W,W,W,X); 347 BODY_20_31(21,D,E,T,A,B,C,W,W,W,X); 348 BODY_20_31(22,C,D,E,T,A,B,W,W,W,X); 349 BODY_20_31(23,B,C,D,E,T,A,W,W,W,X); 350 BODY_20_31(24,A,B,C,D,E,T,W,W,X,X); 351 BODY_20_31(25,T,A,B,C,D,E,W,W,X,X); 352 BODY_20_31(26,E,T,A,B,C,D,W,W,X,X); 353 BODY_20_31(27,D,E,T,A,B,C,W,W,X,X); 354 BODY_20_31(28,C,D,E,T,A,B,W,W,X,X); 355 BODY_20_31(29,B,C,D,E,T,A,W,W,X,X); 356 BODY_20_31(30,A,B,C,D,E,T,W,X,X,X); 357 BODY_20_31(31,T,A,B,C,D,E,W,X,X,X); 358 BODY_32_39(32,E,T,A,B,C,D,X); 359 BODY_32_39(33,D,E,T,A,B,C,X); 360 BODY_32_39(34,C,D,E,T,A,B,X); 361 BODY_32_39(35,B,C,D,E,T,A,X); 362 BODY_32_39(36,A,B,C,D,E,T,X); 363 BODY_32_39(37,T,A,B,C,D,E,X); 364 BODY_32_39(38,E,T,A,B,C,D,X); 365 BODY_32_39(39,D,E,T,A,B,C,X); 366 367 BODY_40_59(40,C,D,E,T,A,B,X); 368 BODY_40_59(41,B,C,D,E,T,A,X); 369 BODY_40_59(42,A,B,C,D,E,T,X); 370 BODY_40_59(43,T,A,B,C,D,E,X); 371 BODY_40_59(44,E,T,A,B,C,D,X); 372 BODY_40_59(45,D,E,T,A,B,C,X); 373 BODY_40_59(46,C,D,E,T,A,B,X); 374 BODY_40_59(47,B,C,D,E,T,A,X); 375 BODY_40_59(48,A,B,C,D,E,T,X); 376 BODY_40_59(49,T,A,B,C,D,E,X); 377 BODY_40_59(50,E,T,A,B,C,D,X); 378 BODY_40_59(51,D,E,T,A,B,C,X); 379 BODY_40_59(52,C,D,E,T,A,B,X); 380 BODY_40_59(53,B,C,D,E,T,A,X); 381 BODY_40_59(54,A,B,C,D,E,T,X); 382 BODY_40_59(55,T,A,B,C,D,E,X); 383 BODY_40_59(56,E,T,A,B,C,D,X); 384 BODY_40_59(57,D,E,T,A,B,C,X); 385 BODY_40_59(58,C,D,E,T,A,B,X); 386 BODY_40_59(59,B,C,D,E,T,A,X); 387 388 BODY_60_79(60,A,B,C,D,E,T,X); 389 BODY_60_79(61,T,A,B,C,D,E,X); 390 BODY_60_79(62,E,T,A,B,C,D,X); 391 BODY_60_79(63,D,E,T,A,B,C,X); 392 BODY_60_79(64,C,D,E,T,A,B,X); 393 BODY_60_79(65,B,C,D,E,T,A,X); 394 BODY_60_79(66,A,B,C,D,E,T,X); 395 BODY_60_79(67,T,A,B,C,D,E,X); 396 BODY_60_79(68,E,T,A,B,C,D,X); 397 BODY_60_79(69,D,E,T,A,B,C,X); 398 BODY_60_79(70,C,D,E,T,A,B,X); 399 BODY_60_79(71,B,C,D,E,T,A,X); 400 BODY_60_79(72,A,B,C,D,E,T,X); 401 BODY_60_79(73,T,A,B,C,D,E,X); 402 BODY_60_79(74,E,T,A,B,C,D,X); 403 BODY_60_79(75,D,E,T,A,B,C,X); 404 BODY_60_79(76,C,D,E,T,A,B,X); 405 BODY_60_79(77,B,C,D,E,T,A,X); 406 BODY_60_79(78,A,B,C,D,E,T,X); 407 BODY_60_79(79,T,A,B,C,D,E,X); 408 409 c->h0=(c->h0+E)&0xffffffffL; 410 c->h1=(c->h1+T)&0xffffffffL; 411 c->h2=(c->h2+A)&0xffffffffL; 412 c->h3=(c->h3+B)&0xffffffffL; 413 c->h4=(c->h4+C)&0xffffffffL; 414 415 num-=64; 416 if (num <= 0) break; 417 418 A=c->h0; 419 B=c->h1; 420 C=c->h2; 421 D=c->h3; 422 E=c->h4; 423 424 W+=16; 425 } 426 } 427 #endif 428 429 void SHA1_Final(unsigned char *md, SHA_CTX *c) 430 { 431 int i,j; 432 u_int32_t l; 433 u_int32_t *p; 434 static unsigned char end[4]={0x80,0x00,0x00,0x00}; 435 unsigned char *cp=end; 436 437 /* c->num should definitly have room for at least one more byte. */ 438 p=c->data; 439 j=c->num; 440 i=j>>2; 441 #ifdef PURIFY 442 if ((j&0x03) == 0) p[i]=0; 443 #endif 444 l=p[i]; 445 M_p_c2nl(cp,l,j&0x03); 446 p[i]=l; 447 i++; 448 /* i is the next 'undefined word' */ 449 if (c->num >= SHA_LAST_BLOCK) 450 { 451 for (; i<SHA_LBLOCK; i++) 452 p[i]=0; 453 sha1_block(c,p,64); 454 i=0; 455 } 456 for (; i<(SHA_LBLOCK-2); i++) 457 p[i]=0; 458 p[SHA_LBLOCK-2]=c->Nh; 459 p[SHA_LBLOCK-1]=c->Nl; 460 #if BYTE_ORDER == LITTLE_ENDIAN && defined(SHA1_ASM) 461 Endian_Reverse32(p[SHA_LBLOCK-2]); 462 Endian_Reverse32(p[SHA_LBLOCK-1]); 463 #endif 464 sha1_block(c,p,64); 465 cp=md; 466 l=c->h0; nl2c(l,cp); 467 l=c->h1; nl2c(l,cp); 468 l=c->h2; nl2c(l,cp); 469 l=c->h3; nl2c(l,cp); 470 l=c->h4; nl2c(l,cp); 471 472 /* Clear the context state */ 473 explicit_bzero(&c, sizeof(c)); 474 } 475 476 #ifdef WEAK_REFS 477 /* When building libmd, provide weak references. Note: this is not 478 activated in the context of compiling these sources for internal 479 use in libcrypt. 480 */ 481 #undef SHA_Init 482 __weak_reference(_libmd_SHA_Init, SHA_Init); 483 #undef SHA_Update 484 __weak_reference(_libmd_SHA_Update, SHA_Update); 485 #undef SHA_Final 486 __weak_reference(_libmd_SHA_Final, SHA_Final); 487 #undef SHA_Transform 488 __weak_reference(_libmd_SHA_Transform, SHA_Transform); 489 #undef SHA_version 490 __weak_reference(_libmd_SHA_version, SHA_version); 491 #undef sha_block 492 __weak_reference(_libmd_sha_block, sha_block); 493 #undef SHA1_Init 494 __weak_reference(_libmd_SHA1_Init, SHA1_Init); 495 #undef SHA1_Update 496 __weak_reference(_libmd_SHA1_Update, SHA1_Update); 497 #undef SHA1_Final 498 __weak_reference(_libmd_SHA1_Final, SHA1_Final); 499 #undef SHA1_Transform 500 __weak_reference(_libmd_SHA1_Transform, SHA1_Transform); 501 #undef SHA1_version 502 __weak_reference(_libmd_SHA1_version, SHA1_version); 503 #undef sha1_block 504 __weak_reference(_libmd_sha1_block, sha1_block); 505 #endif 506