1 /* 2 * $KAME: sha2.c,v 1.8 2001/11/08 01:07:52 itojun Exp $ 3 * $FreeBSD: src/sys/crypto/sha2/sha2.c,v 1.9 2006/10/22 02:19:33 kevlo Exp $ 4 */ 5 6 /* 7 * sha2.c 8 * 9 * Version 1.0.0beta1 10 * 11 * Written by Aaron D. Gifford <me@aarongifford.com> 12 * 13 * Copyright 2000 Aaron D. Gifford. All rights reserved. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. Neither the name of the copyright holder nor the names of contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTOR(S) ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) OR CONTRIBUTOR(S) BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 */ 39 40 41 #include <sys/types.h> 42 #include <sys/time.h> 43 #ifdef _KERNEL 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #else 47 #include <string.h> 48 #endif 49 #include <machine/endian.h> 50 #include <crypto/sha2/sha2.h> 51 52 /* 53 * ASSERT NOTE: 54 * Some sanity checking code is included using assert(). On my FreeBSD 55 * system, this additional code can be removed by compiling with NDEBUG 56 * defined. Check your own systems manpage on assert() to see how to 57 * compile WITHOUT the sanity checking code on your system. 58 * 59 * UNROLLED TRANSFORM LOOP NOTE: 60 * You can define SHA2_UNROLL_TRANSFORM to use the unrolled transform 61 * loop version for the hash transform rounds (defined using macros 62 * later in this file). Either define on the command line, for example: 63 * 64 * cc -DSHA2_UNROLL_TRANSFORM -o sha2 sha2.c sha2prog.c 65 * 66 * or define below: 67 * 68 * #define SHA2_UNROLL_TRANSFORM 69 * 70 */ 71 72 #if defined(__DragonFly__) || defined(__bsdi__) || defined(__FreeBSD__) 73 #define assert(x) 74 #endif 75 76 77 /*** SHA-256/384/512 Machine Architecture Definitions *****************/ 78 /* 79 * BYTE_ORDER NOTE: 80 * 81 * Please make sure that your system defines BYTE_ORDER. If your 82 * architecture is little-endian, make sure it also defines 83 * LITTLE_ENDIAN and that the two (BYTE_ORDER and LITTLE_ENDIAN) are 84 * equivilent. 85 * 86 * If your system does not define the above, then you can do so by 87 * hand like this: 88 * 89 * #define LITTLE_ENDIAN 1234 90 * #define BIG_ENDIAN 4321 91 * 92 * And for little-endian machines, add: 93 * 94 * #define BYTE_ORDER LITTLE_ENDIAN 95 * 96 * Or for big-endian machines: 97 * 98 * #define BYTE_ORDER BIG_ENDIAN 99 * 100 * The FreeBSD machine this was written on defines BYTE_ORDER 101 * appropriately by including <sys/types.h> (which in turn includes 102 * <machine/endian.h> where the appropriate definitions are actually 103 * made). 104 */ 105 #if !defined(BYTE_ORDER) || (BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != BIG_ENDIAN) 106 #error Define BYTE_ORDER to be equal to either LITTLE_ENDIAN or BIG_ENDIAN 107 #endif 108 109 /* 110 * Define the followingsha2_* types to types of the correct length on 111 * the native archtecture. Most BSD systems and Linux define u_intXX_t 112 * types. Machines with very recent ANSI C headers, can use the 113 * uintXX_t definintions from inttypes.h by defining SHA2_USE_INTTYPES_H 114 * during compile or in the sha.h header file. 115 * 116 * Machines that support neither u_intXX_t nor inttypes.h's uintXX_t 117 * will need to define these three typedefs below (and the appropriate 118 * ones in sha.h too) by hand according to their system architecture. 119 * 120 * Thank you, Jun-ichiro itojun Hagino, for suggesting using u_intXX_t 121 * types and pointing out recent ANSI C support for uintXX_t in inttypes.h. 122 */ 123 #if 0 /*def SHA2_USE_INTTYPES_H*/ 124 125 typedef uint8_t sha2_byte; /* Exactly 1 byte */ 126 typedef uint32_t sha2_word32; /* Exactly 4 bytes */ 127 typedef uint64_t sha2_word64; /* Exactly 8 bytes */ 128 129 #else /* SHA2_USE_INTTYPES_H */ 130 131 typedef u_int8_t sha2_byte; /* Exactly 1 byte */ 132 typedef u_int32_t sha2_word32; /* Exactly 4 bytes */ 133 typedef u_int64_t sha2_word64; /* Exactly 8 bytes */ 134 135 #endif /* SHA2_USE_INTTYPES_H */ 136 137 138 /*** SHA-256/384/512 Various Length Definitions ***********************/ 139 /* NOTE: Most of these are in sha2.h */ 140 #define SHA256_SHORT_BLOCK_LENGTH (SHA256_BLOCK_LENGTH - 8) 141 #define SHA384_SHORT_BLOCK_LENGTH (SHA384_BLOCK_LENGTH - 16) 142 #define SHA512_SHORT_BLOCK_LENGTH (SHA512_BLOCK_LENGTH - 16) 143 144 145 /*** ENDIAN REVERSAL MACROS *******************************************/ 146 #if BYTE_ORDER == LITTLE_ENDIAN 147 #define REVERSE32(w,x) { \ 148 sha2_word32 tmp = (w); \ 149 tmp = (tmp >> 16) | (tmp << 16); \ 150 (x) = ((tmp & 0xff00ff00UL) >> 8) | ((tmp & 0x00ff00ffUL) << 8); \ 151 } 152 #define REVERSE64(w,x) { \ 153 sha2_word64 tmp = (w); \ 154 tmp = (tmp >> 32) | (tmp << 32); \ 155 tmp = ((tmp & 0xff00ff00ff00ff00ULL) >> 8) | \ 156 ((tmp & 0x00ff00ff00ff00ffULL) << 8); \ 157 (x) = ((tmp & 0xffff0000ffff0000ULL) >> 16) | \ 158 ((tmp & 0x0000ffff0000ffffULL) << 16); \ 159 } 160 #endif /* BYTE_ORDER == LITTLE_ENDIAN */ 161 162 /* 163 * Macro for incrementally adding the unsigned 64-bit integer n to the 164 * unsigned 128-bit integer (represented using a two-element array of 165 * 64-bit words): 166 */ 167 #define ADDINC128(w,n) { \ 168 (w)[0] += (sha2_word64)(n); \ 169 if ((w)[0] < (n)) { \ 170 (w)[1]++; \ 171 } \ 172 } 173 174 /*** THE SIX LOGICAL FUNCTIONS ****************************************/ 175 /* 176 * Bit shifting and rotation (used by the six SHA-XYZ logical functions: 177 * 178 * NOTE: The naming of R and S appears backwards here (R is a SHIFT and 179 * S is a ROTATION) because the SHA-256/384/512 description document 180 * (see http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf) uses this 181 * same "backwards" definition. 182 */ 183 /* Shift-right (used in SHA-256, SHA-384, and SHA-512): */ 184 #define R(b,x) ((x) >> (b)) 185 /* 32-bit Rotate-right (used in SHA-256): */ 186 #define S32(b,x) (((x) >> (b)) | ((x) << (32 - (b)))) 187 /* 64-bit Rotate-right (used in SHA-384 and SHA-512): */ 188 #define S64(b,x) (((x) >> (b)) | ((x) << (64 - (b)))) 189 190 /* Two of six logical functions used in SHA-256, SHA-384, and SHA-512: */ 191 #define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z))) 192 #define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z))) 193 194 /* Four of six logical functions used in SHA-256: */ 195 #define Sigma0_256(x) (S32(2, (x)) ^ S32(13, (x)) ^ S32(22, (x))) 196 #define Sigma1_256(x) (S32(6, (x)) ^ S32(11, (x)) ^ S32(25, (x))) 197 #define sigma0_256(x) (S32(7, (x)) ^ S32(18, (x)) ^ R(3 , (x))) 198 #define sigma1_256(x) (S32(17, (x)) ^ S32(19, (x)) ^ R(10, (x))) 199 200 /* Four of six logical functions used in SHA-384 and SHA-512: */ 201 #define Sigma0_512(x) (S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x))) 202 #define Sigma1_512(x) (S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x))) 203 #define sigma0_512(x) (S64( 1, (x)) ^ S64( 8, (x)) ^ R( 7, (x))) 204 #define sigma1_512(x) (S64(19, (x)) ^ S64(61, (x)) ^ R( 6, (x))) 205 206 /*** INTERNAL FUNCTION PROTOTYPES *************************************/ 207 /* NOTE: These should not be accessed directly from outside this 208 * library -- they are intended for private internal visibility/use 209 * only. 210 */ 211 void SHA512_Last(SHA512_CTX*); 212 void SHA256_Transform(SHA256_CTX*, const sha2_word32*); 213 void SHA512_Transform(SHA512_CTX*, const sha2_word64*); 214 215 216 /*** SHA-XYZ INITIAL HASH VALUES AND CONSTANTS ************************/ 217 /* Hash constant words K for SHA-256: */ 218 static const sha2_word32 K256[64] = { 219 0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL, 220 0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL, 221 0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL, 222 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL, 223 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL, 224 0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL, 225 0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL, 226 0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL, 227 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL, 228 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL, 229 0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL, 230 0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL, 231 0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL, 232 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL, 233 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL, 234 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL 235 }; 236 237 /* Initial hash value H for SHA-256: */ 238 static const sha2_word32 sha256_initial_hash_value[8] = { 239 0x6a09e667UL, 240 0xbb67ae85UL, 241 0x3c6ef372UL, 242 0xa54ff53aUL, 243 0x510e527fUL, 244 0x9b05688cUL, 245 0x1f83d9abUL, 246 0x5be0cd19UL 247 }; 248 249 /* Hash constant words K for SHA-384 and SHA-512: */ 250 static const sha2_word64 K512[80] = { 251 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 252 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL, 253 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 254 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 255 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, 256 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, 257 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 258 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL, 259 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 260 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 261 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, 262 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, 263 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 264 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL, 265 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 266 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 267 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, 268 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, 269 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 270 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL, 271 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 272 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 273 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, 274 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, 275 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 276 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL, 277 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 278 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 279 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, 280 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, 281 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 282 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL, 283 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 284 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 285 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, 286 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, 287 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 288 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL, 289 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 290 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL 291 }; 292 293 /* Initial hash value H for SHA-384 */ 294 static const sha2_word64 sha384_initial_hash_value[8] = { 295 0xcbbb9d5dc1059ed8ULL, 296 0x629a292a367cd507ULL, 297 0x9159015a3070dd17ULL, 298 0x152fecd8f70e5939ULL, 299 0x67332667ffc00b31ULL, 300 0x8eb44a8768581511ULL, 301 0xdb0c2e0d64f98fa7ULL, 302 0x47b5481dbefa4fa4ULL 303 }; 304 305 /* Initial hash value H for SHA-512 */ 306 static const sha2_word64 sha512_initial_hash_value[8] = { 307 0x6a09e667f3bcc908ULL, 308 0xbb67ae8584caa73bULL, 309 0x3c6ef372fe94f82bULL, 310 0xa54ff53a5f1d36f1ULL, 311 0x510e527fade682d1ULL, 312 0x9b05688c2b3e6c1fULL, 313 0x1f83d9abfb41bd6bULL, 314 0x5be0cd19137e2179ULL 315 }; 316 317 /* 318 * Constant used by SHA256/384/512_End() functions for converting the 319 * digest to a readable hexadecimal character string: 320 */ 321 static const char *sha2_hex_digits = "0123456789abcdef"; 322 323 324 /*** SHA-256: *********************************************************/ 325 void SHA256_Init(SHA256_CTX* context) { 326 if (context == NULL) { 327 return; 328 } 329 bcopy(sha256_initial_hash_value, context->state, SHA256_DIGEST_LENGTH); 330 bzero(context->buffer, SHA256_BLOCK_LENGTH); 331 context->bitcount = 0; 332 } 333 334 #ifdef SHA2_UNROLL_TRANSFORM 335 336 /* Unrolled SHA-256 round macros: */ 337 338 #if BYTE_ORDER == LITTLE_ENDIAN 339 340 #define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \ 341 REVERSE32(*data++, W256[j]); \ 342 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \ 343 K256[j] + W256[j]; \ 344 (d) += T1; \ 345 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \ 346 j++ 347 348 349 #else /* BYTE_ORDER == LITTLE_ENDIAN */ 350 351 #define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \ 352 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \ 353 K256[j] + (W256[j] = *data++); \ 354 (d) += T1; \ 355 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \ 356 j++ 357 358 #endif /* BYTE_ORDER == LITTLE_ENDIAN */ 359 360 #define ROUND256(a,b,c,d,e,f,g,h) \ 361 s0 = W256[(j+1)&0x0f]; \ 362 s0 = sigma0_256(s0); \ 363 s1 = W256[(j+14)&0x0f]; \ 364 s1 = sigma1_256(s1); \ 365 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + K256[j] + \ 366 (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0); \ 367 (d) += T1; \ 368 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \ 369 j++ 370 371 void SHA256_Transform(SHA256_CTX* context, const sha2_word32* data) { 372 sha2_word32 a, b, c, d, e, f, g, h, s0, s1; 373 sha2_word32 T1, *W256; 374 int j; 375 376 W256 = (sha2_word32*)context->buffer; 377 378 /* Initialize registers with the prev. intermediate value */ 379 a = context->state[0]; 380 b = context->state[1]; 381 c = context->state[2]; 382 d = context->state[3]; 383 e = context->state[4]; 384 f = context->state[5]; 385 g = context->state[6]; 386 h = context->state[7]; 387 388 j = 0; 389 do { 390 /* Rounds 0 to 15 (unrolled): */ 391 ROUND256_0_TO_15(a,b,c,d,e,f,g,h); 392 ROUND256_0_TO_15(h,a,b,c,d,e,f,g); 393 ROUND256_0_TO_15(g,h,a,b,c,d,e,f); 394 ROUND256_0_TO_15(f,g,h,a,b,c,d,e); 395 ROUND256_0_TO_15(e,f,g,h,a,b,c,d); 396 ROUND256_0_TO_15(d,e,f,g,h,a,b,c); 397 ROUND256_0_TO_15(c,d,e,f,g,h,a,b); 398 ROUND256_0_TO_15(b,c,d,e,f,g,h,a); 399 } while (j < 16); 400 401 /* Now for the remaining rounds to 64: */ 402 do { 403 ROUND256(a,b,c,d,e,f,g,h); 404 ROUND256(h,a,b,c,d,e,f,g); 405 ROUND256(g,h,a,b,c,d,e,f); 406 ROUND256(f,g,h,a,b,c,d,e); 407 ROUND256(e,f,g,h,a,b,c,d); 408 ROUND256(d,e,f,g,h,a,b,c); 409 ROUND256(c,d,e,f,g,h,a,b); 410 ROUND256(b,c,d,e,f,g,h,a); 411 } while (j < 64); 412 413 /* Compute the current intermediate hash value */ 414 context->state[0] += a; 415 context->state[1] += b; 416 context->state[2] += c; 417 context->state[3] += d; 418 context->state[4] += e; 419 context->state[5] += f; 420 context->state[6] += g; 421 context->state[7] += h; 422 423 /* Clean up */ 424 a = b = c = d = e = f = g = h = T1 = 0; 425 } 426 427 #else /* SHA2_UNROLL_TRANSFORM */ 428 429 void SHA256_Transform(SHA256_CTX* context, const sha2_word32* data) { 430 sha2_word32 a, b, c, d, e, f, g, h, s0, s1; 431 sha2_word32 T1, T2, *W256; 432 int j; 433 434 W256 = (sha2_word32*)context->buffer; 435 436 /* Initialize registers with the prev. intermediate value */ 437 a = context->state[0]; 438 b = context->state[1]; 439 c = context->state[2]; 440 d = context->state[3]; 441 e = context->state[4]; 442 f = context->state[5]; 443 g = context->state[6]; 444 h = context->state[7]; 445 446 j = 0; 447 do { 448 #if BYTE_ORDER == LITTLE_ENDIAN 449 /* Copy data while converting to host byte order */ 450 REVERSE32(*data++,W256[j]); 451 /* Apply the SHA-256 compression function to update a..h */ 452 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + W256[j]; 453 #else /* BYTE_ORDER == LITTLE_ENDIAN */ 454 /* Apply the SHA-256 compression function to update a..h with copy */ 455 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + (W256[j] = *data++); 456 #endif /* BYTE_ORDER == LITTLE_ENDIAN */ 457 T2 = Sigma0_256(a) + Maj(a, b, c); 458 h = g; 459 g = f; 460 f = e; 461 e = d + T1; 462 d = c; 463 c = b; 464 b = a; 465 a = T1 + T2; 466 467 j++; 468 } while (j < 16); 469 470 do { 471 /* Part of the message block expansion: */ 472 s0 = W256[(j+1)&0x0f]; 473 s0 = sigma0_256(s0); 474 s1 = W256[(j+14)&0x0f]; 475 s1 = sigma1_256(s1); 476 477 /* Apply the SHA-256 compression function to update a..h */ 478 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + 479 (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0); 480 T2 = Sigma0_256(a) + Maj(a, b, c); 481 h = g; 482 g = f; 483 f = e; 484 e = d + T1; 485 d = c; 486 c = b; 487 b = a; 488 a = T1 + T2; 489 490 j++; 491 } while (j < 64); 492 493 /* Compute the current intermediate hash value */ 494 context->state[0] += a; 495 context->state[1] += b; 496 context->state[2] += c; 497 context->state[3] += d; 498 context->state[4] += e; 499 context->state[5] += f; 500 context->state[6] += g; 501 context->state[7] += h; 502 503 /* Clean up */ 504 a = b = c = d = e = f = g = h = T1 = T2 = 0; 505 } 506 507 #endif /* SHA2_UNROLL_TRANSFORM */ 508 509 void SHA256_Update(SHA256_CTX* context, const sha2_byte *data, size_t len) { 510 unsigned int freespace, usedspace; 511 512 if (len == 0) { 513 /* Calling with no data is valid - we do nothing */ 514 return; 515 } 516 517 /* Sanity check: */ 518 assert(context != NULL && data != NULL); 519 520 usedspace = (context->bitcount >> 3) % SHA256_BLOCK_LENGTH; 521 if (usedspace > 0) { 522 /* Calculate how much free space is available in the buffer */ 523 freespace = SHA256_BLOCK_LENGTH - usedspace; 524 525 if (len >= freespace) { 526 /* Fill the buffer completely and process it */ 527 bcopy(data, &context->buffer[usedspace], freespace); 528 context->bitcount += freespace << 3; 529 len -= freespace; 530 data += freespace; 531 SHA256_Transform(context, (sha2_word32*)context->buffer); 532 } else { 533 /* The buffer is not yet full */ 534 bcopy(data, &context->buffer[usedspace], len); 535 context->bitcount += len << 3; 536 /* Clean up: */ 537 usedspace = freespace = 0; 538 return; 539 } 540 } 541 while (len >= SHA256_BLOCK_LENGTH) { 542 /* Process as many complete blocks as we can */ 543 SHA256_Transform(context, (const sha2_word32*)data); 544 context->bitcount += SHA256_BLOCK_LENGTH << 3; 545 len -= SHA256_BLOCK_LENGTH; 546 data += SHA256_BLOCK_LENGTH; 547 } 548 if (len > 0) { 549 /* There's left-overs, so save 'em */ 550 bcopy(data, context->buffer, len); 551 context->bitcount += len << 3; 552 } 553 /* Clean up: */ 554 usedspace = freespace = 0; 555 } 556 557 void SHA256_Final(sha2_byte digest[], SHA256_CTX* context) { 558 sha2_word32 *d = (sha2_word32*)digest; 559 unsigned int usedspace; 560 561 /* Sanity check: */ 562 assert(context != NULL); 563 564 /* If no digest buffer is passed, we don't bother doing this: */ 565 if (digest != NULL) { 566 usedspace = (context->bitcount >> 3) % SHA256_BLOCK_LENGTH; 567 #if BYTE_ORDER == LITTLE_ENDIAN 568 /* Convert FROM host byte order */ 569 REVERSE64(context->bitcount,context->bitcount); 570 #endif 571 if (usedspace > 0) { 572 /* Begin padding with a 1 bit: */ 573 context->buffer[usedspace++] = 0x80; 574 575 if (usedspace <= SHA256_SHORT_BLOCK_LENGTH) { 576 /* Set-up for the last transform: */ 577 bzero(&context->buffer[usedspace], SHA256_SHORT_BLOCK_LENGTH - usedspace); 578 } else { 579 if (usedspace < SHA256_BLOCK_LENGTH) { 580 bzero(&context->buffer[usedspace], SHA256_BLOCK_LENGTH - usedspace); 581 } 582 /* Do second-to-last transform: */ 583 SHA256_Transform(context, (sha2_word32*)context->buffer); 584 585 /* And set-up for the last transform: */ 586 bzero(context->buffer, SHA256_SHORT_BLOCK_LENGTH); 587 } 588 } else { 589 /* Set-up for the last transform: */ 590 bzero(context->buffer, SHA256_SHORT_BLOCK_LENGTH); 591 592 /* Begin padding with a 1 bit: */ 593 *context->buffer = 0x80; 594 } 595 /* Set the bit count: */ 596 *(sha2_word64*)&context->buffer[SHA256_SHORT_BLOCK_LENGTH] = context->bitcount; 597 598 /* Final transform: */ 599 SHA256_Transform(context, (sha2_word32*)context->buffer); 600 601 #if BYTE_ORDER == LITTLE_ENDIAN 602 { 603 /* Convert TO host byte order */ 604 int j; 605 for (j = 0; j < 8; j++) { 606 REVERSE32(context->state[j],context->state[j]); 607 *d++ = context->state[j]; 608 } 609 } 610 #else 611 bcopy(context->state, d, SHA256_DIGEST_LENGTH); 612 #endif 613 } 614 615 /* Clean up state data: */ 616 bzero(context, sizeof(*context)); 617 usedspace = 0; 618 } 619 620 char *SHA256_End(SHA256_CTX* context, char buffer[]) { 621 sha2_byte digest[SHA256_DIGEST_LENGTH], *d = digest; 622 int i; 623 624 /* Sanity check: */ 625 assert(context != NULL); 626 627 if (buffer != NULL) { 628 SHA256_Final(digest, context); 629 630 for (i = 0; i < SHA256_DIGEST_LENGTH; i++) { 631 *buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4]; 632 *buffer++ = sha2_hex_digits[*d & 0x0f]; 633 d++; 634 } 635 *buffer = (char)0; 636 } else { 637 bzero(context, sizeof(*context)); 638 } 639 bzero(digest, SHA256_DIGEST_LENGTH); 640 return buffer; 641 } 642 643 char* SHA256_Data(const sha2_byte* data, size_t len, char digest[SHA256_DIGEST_STRING_LENGTH]) { 644 SHA256_CTX context; 645 646 SHA256_Init(&context); 647 SHA256_Update(&context, data, len); 648 return SHA256_End(&context, digest); 649 } 650 651 652 /*** SHA-512: *********************************************************/ 653 void SHA512_Init(SHA512_CTX* context) { 654 if (context == NULL) { 655 return; 656 } 657 bcopy(sha512_initial_hash_value, context->state, SHA512_DIGEST_LENGTH); 658 bzero(context->buffer, SHA512_BLOCK_LENGTH); 659 context->bitcount[0] = context->bitcount[1] = 0; 660 } 661 662 #ifdef SHA2_UNROLL_TRANSFORM 663 664 /* Unrolled SHA-512 round macros: */ 665 #if BYTE_ORDER == LITTLE_ENDIAN 666 667 #define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \ 668 REVERSE64(*data++, W512[j]); \ 669 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \ 670 K512[j] + W512[j]; \ 671 (d) += T1, \ 672 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)), \ 673 j++ 674 675 676 #else /* BYTE_ORDER == LITTLE_ENDIAN */ 677 678 #define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \ 679 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \ 680 K512[j] + (W512[j] = *data++); \ 681 (d) += T1; \ 682 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \ 683 j++ 684 685 #endif /* BYTE_ORDER == LITTLE_ENDIAN */ 686 687 #define ROUND512(a,b,c,d,e,f,g,h) \ 688 s0 = W512[(j+1)&0x0f]; \ 689 s0 = sigma0_512(s0); \ 690 s1 = W512[(j+14)&0x0f]; \ 691 s1 = sigma1_512(s1); \ 692 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + K512[j] + \ 693 (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0); \ 694 (d) += T1; \ 695 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \ 696 j++ 697 698 void SHA512_Transform(SHA512_CTX* context, const sha2_word64* data) { 699 sha2_word64 a, b, c, d, e, f, g, h, s0, s1; 700 sha2_word64 T1 = 0, T2 = 0, *W512 = (sha2_word64*)context->buffer; 701 int j; 702 703 /* Initialize registers with the prev. intermediate value */ 704 a = context->state[0]; 705 b = context->state[1]; 706 c = context->state[2]; 707 d = context->state[3]; 708 e = context->state[4]; 709 f = context->state[5]; 710 g = context->state[6]; 711 h = context->state[7]; 712 713 j = 0; 714 do { 715 ROUND512_0_TO_15(a,b,c,d,e,f,g,h); 716 ROUND512_0_TO_15(h,a,b,c,d,e,f,g); 717 ROUND512_0_TO_15(g,h,a,b,c,d,e,f); 718 ROUND512_0_TO_15(f,g,h,a,b,c,d,e); 719 ROUND512_0_TO_15(e,f,g,h,a,b,c,d); 720 ROUND512_0_TO_15(d,e,f,g,h,a,b,c); 721 ROUND512_0_TO_15(c,d,e,f,g,h,a,b); 722 ROUND512_0_TO_15(b,c,d,e,f,g,h,a); 723 } while (j < 16); 724 725 /* Now for the remaining rounds up to 79: */ 726 do { 727 ROUND512(a,b,c,d,e,f,g,h); 728 ROUND512(h,a,b,c,d,e,f,g); 729 ROUND512(g,h,a,b,c,d,e,f); 730 ROUND512(f,g,h,a,b,c,d,e); 731 ROUND512(e,f,g,h,a,b,c,d); 732 ROUND512(d,e,f,g,h,a,b,c); 733 ROUND512(c,d,e,f,g,h,a,b); 734 ROUND512(b,c,d,e,f,g,h,a); 735 } while (j < 80); 736 737 /* Compute the current intermediate hash value */ 738 context->state[0] += a; 739 context->state[1] += b; 740 context->state[2] += c; 741 context->state[3] += d; 742 context->state[4] += e; 743 context->state[5] += f; 744 context->state[6] += g; 745 context->state[7] += h; 746 747 /* Clean up */ 748 a = b = c = d = e = f = g = h = T1 = 0; 749 } 750 751 #else /* SHA2_UNROLL_TRANSFORM */ 752 753 void SHA512_Transform(SHA512_CTX* context, const sha2_word64* data) { 754 sha2_word64 a, b, c, d, e, f, g, h, s0, s1; 755 sha2_word64 T1, T2, *W512 = (sha2_word64*)context->buffer; 756 int j; 757 758 /* Initialize registers with the prev. intermediate value */ 759 a = context->state[0]; 760 b = context->state[1]; 761 c = context->state[2]; 762 d = context->state[3]; 763 e = context->state[4]; 764 f = context->state[5]; 765 g = context->state[6]; 766 h = context->state[7]; 767 768 j = 0; 769 do { 770 #if BYTE_ORDER == LITTLE_ENDIAN 771 /* Convert TO host byte order */ 772 REVERSE64(*data++, W512[j]); 773 /* Apply the SHA-512 compression function to update a..h */ 774 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + W512[j]; 775 #else /* BYTE_ORDER == LITTLE_ENDIAN */ 776 /* Apply the SHA-512 compression function to update a..h with copy */ 777 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + (W512[j] = *data++); 778 #endif /* BYTE_ORDER == LITTLE_ENDIAN */ 779 T2 = Sigma0_512(a) + Maj(a, b, c); 780 h = g; 781 g = f; 782 f = e; 783 e = d + T1; 784 d = c; 785 c = b; 786 b = a; 787 a = T1 + T2; 788 789 j++; 790 } while (j < 16); 791 792 do { 793 /* Part of the message block expansion: */ 794 s0 = W512[(j+1)&0x0f]; 795 s0 = sigma0_512(s0); 796 s1 = W512[(j+14)&0x0f]; 797 s1 = sigma1_512(s1); 798 799 /* Apply the SHA-512 compression function to update a..h */ 800 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + 801 (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0); 802 T2 = Sigma0_512(a) + Maj(a, b, c); 803 h = g; 804 g = f; 805 f = e; 806 e = d + T1; 807 d = c; 808 c = b; 809 b = a; 810 a = T1 + T2; 811 812 j++; 813 } while (j < 80); 814 815 /* Compute the current intermediate hash value */ 816 context->state[0] += a; 817 context->state[1] += b; 818 context->state[2] += c; 819 context->state[3] += d; 820 context->state[4] += e; 821 context->state[5] += f; 822 context->state[6] += g; 823 context->state[7] += h; 824 825 /* Clean up */ 826 a = b = c = d = e = f = g = h = T1 = T2 = 0; 827 } 828 829 #endif /* SHA2_UNROLL_TRANSFORM */ 830 831 void SHA512_Update(SHA512_CTX* context, const sha2_byte *data, size_t len) { 832 unsigned int freespace, usedspace; 833 834 if (len == 0) { 835 /* Calling with no data is valid - we do nothing */ 836 return; 837 } 838 839 /* Sanity check: */ 840 assert(context != NULL && data != NULL); 841 842 usedspace = (context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH; 843 if (usedspace > 0) { 844 /* Calculate how much free space is available in the buffer */ 845 freespace = SHA512_BLOCK_LENGTH - usedspace; 846 847 if (len >= freespace) { 848 /* Fill the buffer completely and process it */ 849 bcopy(data, &context->buffer[usedspace], freespace); 850 ADDINC128(context->bitcount, freespace << 3); 851 len -= freespace; 852 data += freespace; 853 SHA512_Transform(context, (sha2_word64*)context->buffer); 854 } else { 855 /* The buffer is not yet full */ 856 bcopy(data, &context->buffer[usedspace], len); 857 ADDINC128(context->bitcount, len << 3); 858 /* Clean up: */ 859 usedspace = freespace = 0; 860 return; 861 } 862 } 863 while (len >= SHA512_BLOCK_LENGTH) { 864 /* Process as many complete blocks as we can */ 865 SHA512_Transform(context, (const sha2_word64*)data); 866 ADDINC128(context->bitcount, SHA512_BLOCK_LENGTH << 3); 867 len -= SHA512_BLOCK_LENGTH; 868 data += SHA512_BLOCK_LENGTH; 869 } 870 if (len > 0) { 871 /* There's left-overs, so save 'em */ 872 bcopy(data, context->buffer, len); 873 ADDINC128(context->bitcount, len << 3); 874 } 875 /* Clean up: */ 876 usedspace = freespace = 0; 877 } 878 879 void SHA512_Last(SHA512_CTX* context) { 880 unsigned int usedspace; 881 882 usedspace = (context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH; 883 #if BYTE_ORDER == LITTLE_ENDIAN 884 /* Convert FROM host byte order */ 885 REVERSE64(context->bitcount[0],context->bitcount[0]); 886 REVERSE64(context->bitcount[1],context->bitcount[1]); 887 #endif 888 if (usedspace > 0) { 889 /* Begin padding with a 1 bit: */ 890 context->buffer[usedspace++] = 0x80; 891 892 if (usedspace <= SHA512_SHORT_BLOCK_LENGTH) { 893 /* Set-up for the last transform: */ 894 bzero(&context->buffer[usedspace], SHA512_SHORT_BLOCK_LENGTH - usedspace); 895 } else { 896 if (usedspace < SHA512_BLOCK_LENGTH) { 897 bzero(&context->buffer[usedspace], SHA512_BLOCK_LENGTH - usedspace); 898 } 899 /* Do second-to-last transform: */ 900 SHA512_Transform(context, (sha2_word64*)context->buffer); 901 902 /* And set-up for the last transform: */ 903 bzero(context->buffer, SHA512_BLOCK_LENGTH - 2); 904 } 905 } else { 906 /* Prepare for final transform: */ 907 bzero(context->buffer, SHA512_SHORT_BLOCK_LENGTH); 908 909 /* Begin padding with a 1 bit: */ 910 *context->buffer = 0x80; 911 } 912 /* Store the length of input data (in bits): */ 913 *(sha2_word64*)&context->buffer[SHA512_SHORT_BLOCK_LENGTH] = context->bitcount[1]; 914 *(sha2_word64*)&context->buffer[SHA512_SHORT_BLOCK_LENGTH+8] = context->bitcount[0]; 915 916 /* Final transform: */ 917 SHA512_Transform(context, (sha2_word64*)context->buffer); 918 } 919 920 void SHA512_Final(sha2_byte digest[], SHA512_CTX* context) { 921 sha2_word64 *d = (sha2_word64*)digest; 922 923 /* Sanity check: */ 924 assert(context != NULL); 925 926 /* If no digest buffer is passed, we don't bother doing this: */ 927 if (digest != NULL) { 928 SHA512_Last(context); 929 930 /* Save the hash data for output: */ 931 #if BYTE_ORDER == LITTLE_ENDIAN 932 { 933 /* Convert TO host byte order */ 934 int j; 935 for (j = 0; j < 8; j++) { 936 REVERSE64(context->state[j],context->state[j]); 937 *d++ = context->state[j]; 938 } 939 } 940 #else 941 bcopy(context->state, d, SHA512_DIGEST_LENGTH); 942 #endif 943 } 944 945 /* Zero out state data */ 946 bzero(context, sizeof(*context)); 947 } 948 949 char *SHA512_End(SHA512_CTX* context, char buffer[]) { 950 sha2_byte digest[SHA512_DIGEST_LENGTH], *d = digest; 951 int i; 952 953 /* Sanity check: */ 954 assert(context != NULL); 955 956 if (buffer != NULL) { 957 SHA512_Final(digest, context); 958 959 for (i = 0; i < SHA512_DIGEST_LENGTH; i++) { 960 *buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4]; 961 *buffer++ = sha2_hex_digits[*d & 0x0f]; 962 d++; 963 } 964 *buffer = (char)0; 965 } else { 966 bzero(context, sizeof(*context)); 967 } 968 bzero(digest, SHA512_DIGEST_LENGTH); 969 return buffer; 970 } 971 972 char* SHA512_Data(const sha2_byte* data, size_t len, char digest[SHA512_DIGEST_STRING_LENGTH]) { 973 SHA512_CTX context; 974 975 SHA512_Init(&context); 976 SHA512_Update(&context, data, len); 977 return SHA512_End(&context, digest); 978 } 979 980 981 /*** SHA-384: *********************************************************/ 982 void SHA384_Init(SHA384_CTX* context) { 983 if (context == NULL) { 984 return; 985 } 986 bcopy(sha384_initial_hash_value, context->state, SHA512_DIGEST_LENGTH); 987 bzero(context->buffer, SHA384_BLOCK_LENGTH); 988 context->bitcount[0] = context->bitcount[1] = 0; 989 } 990 991 void SHA384_Update(SHA384_CTX* context, const sha2_byte* data, size_t len) { 992 SHA512_Update((SHA512_CTX*)context, data, len); 993 } 994 995 void SHA384_Final(sha2_byte digest[], SHA384_CTX* context) { 996 sha2_word64 *d = (sha2_word64*)digest; 997 998 /* Sanity check: */ 999 assert(context != NULL); 1000 1001 /* If no digest buffer is passed, we don't bother doing this: */ 1002 if (digest != NULL) { 1003 SHA512_Last((SHA512_CTX*)context); 1004 1005 /* Save the hash data for output: */ 1006 #if BYTE_ORDER == LITTLE_ENDIAN 1007 { 1008 /* Convert TO host byte order */ 1009 int j; 1010 for (j = 0; j < 6; j++) { 1011 REVERSE64(context->state[j],context->state[j]); 1012 *d++ = context->state[j]; 1013 } 1014 } 1015 #else 1016 bcopy(context->state, d, SHA384_DIGEST_LENGTH); 1017 #endif 1018 } 1019 1020 /* Zero out state data */ 1021 bzero(context, sizeof(*context)); 1022 } 1023 1024 char *SHA384_End(SHA384_CTX* context, char buffer[]) { 1025 sha2_byte digest[SHA384_DIGEST_LENGTH], *d = digest; 1026 int i; 1027 1028 /* Sanity check: */ 1029 assert(context != NULL); 1030 1031 if (buffer != NULL) { 1032 SHA384_Final(digest, context); 1033 1034 for (i = 0; i < SHA384_DIGEST_LENGTH; i++) { 1035 *buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4]; 1036 *buffer++ = sha2_hex_digits[*d & 0x0f]; 1037 d++; 1038 } 1039 *buffer = (char)0; 1040 } else { 1041 bzero(context, sizeof(*context)); 1042 } 1043 bzero(digest, SHA384_DIGEST_LENGTH); 1044 return buffer; 1045 } 1046 1047 char* SHA384_Data(const sha2_byte* data, size_t len, char digest[SHA384_DIGEST_STRING_LENGTH]) { 1048 SHA384_CTX context; 1049 1050 SHA384_Init(&context); 1051 SHA384_Update(&context, data, len); 1052 return SHA384_End(&context, digest); 1053 } 1054 1055