1/* $NetBSD: sha2.c,v 1.21 2010/01/24 21:11:18 joerg Exp $ */ 2/* $KAME: sha2.c,v 1.9 2003/07/20 00:28:38 itojun Exp $ */ 3 4/* 5 * sha2.c 6 * 7 * Version 1.0.0beta1 8 * 9 * Written by Aaron D. Gifford <me@aarongifford.com> 10 * 11 * Copyright 2000 Aaron D. Gifford. All rights reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the copyright holder nor the names of contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTOR(S) ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) OR CONTRIBUTOR(S) BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 */ 38 39#if HAVE_NBTOOL_CONFIG_H 40#include "nbtool_config.h" 41#endif 42 43#include <sys/cdefs.h> 44 45#if defined(_KERNEL) || defined(_STANDALONE) 46__KERNEL_RCSID(0, "$NetBSD: sha2.c,v 1.21 2010/01/24 21:11:18 joerg Exp $"); 47 48#include <sys/param.h> /* XXX: to pull <machine/macros.h> for vax memset(9) */ 49#include <lib/libkern/libkern.h> 50 51#else 52 53#if defined(LIBC_SCCS) && !defined(lint) 54__RCSID("$NetBSD: sha2.c,v 1.21 2010/01/24 21:11:18 joerg Exp $"); 55#endif /* LIBC_SCCS and not lint */ 56 57#include "namespace.h" 58#include <string.h> 59 60#endif 61 62#include <sys/types.h> 63#include <sys/sha2.h> 64 65#if HAVE_NBTOOL_CONFIG_H 66# if HAVE_SYS_ENDIAN_H 67# include <sys/endian.h> 68# else 69# undef htobe32 70# undef htobe64 71# undef be32toh 72# undef be64toh 73 74static uint32_t 75htobe32(uint32_t x) 76{ 77 uint8_t p[4]; 78 memcpy(p, &x, 4); 79 80 return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]); 81} 82 83static uint64_t 84htobe64(uint64_t x) 85{ 86 uint8_t p[8]; 87 uint32_t u, v; 88 memcpy(p, &x, 8); 89 90 u = ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]); 91 v = ((p[4] << 24) | (p[5] << 16) | (p[6] << 8) | p[7]); 92 93 return ((((uint64_t)u) << 32) | v); 94} 95 96static uint32_t 97be32toh(uint32_t x) 98{ 99 return htobe32(x); 100} 101 102static uint64_t 103be64toh(uint64_t x) 104{ 105 return htobe64(x); 106} 107# endif 108#endif 109 110/*** SHA-256/384/512 Various Length Definitions ***********************/ 111/* NOTE: Most of these are in sha2.h */ 112#define SHA256_SHORT_BLOCK_LENGTH (SHA256_BLOCK_LENGTH - 8) 113#define SHA384_SHORT_BLOCK_LENGTH (SHA384_BLOCK_LENGTH - 16) 114#define SHA512_SHORT_BLOCK_LENGTH (SHA512_BLOCK_LENGTH - 16) 115 116/* 117 * Macro for incrementally adding the unsigned 64-bit integer n to the 118 * unsigned 128-bit integer (represented using a two-element array of 119 * 64-bit words): 120 */ 121#define ADDINC128(w,n) { \ 122 (w)[0] += (uint64_t)(n); \ 123 if ((w)[0] < (n)) { \ 124 (w)[1]++; \ 125 } \ 126} 127 128/*** THE SIX LOGICAL FUNCTIONS ****************************************/ 129/* 130 * Bit shifting and rotation (used by the six SHA-XYZ logical functions: 131 * 132 * NOTE: The naming of R and S appears backwards here (R is a SHIFT and 133 * S is a ROTATION) because the SHA-256/384/512 description document 134 * (see http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf) uses this 135 * same "backwards" definition. 136 */ 137/* Shift-right (used in SHA-256, SHA-384, and SHA-512): */ 138#define R(b,x) ((x) >> (b)) 139/* 32-bit Rotate-right (used in SHA-256): */ 140#define S32(b,x) (((x) >> (b)) | ((x) << (32 - (b)))) 141/* 64-bit Rotate-right (used in SHA-384 and SHA-512): */ 142#define S64(b,x) (((x) >> (b)) | ((x) << (64 - (b)))) 143 144/* Two of six logical functions used in SHA-256, SHA-384, and SHA-512: */ 145#define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z))) 146#define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z))) 147 148/* Four of six logical functions used in SHA-256: */ 149#define Sigma0_256(x) (S32(2, (x)) ^ S32(13, (x)) ^ S32(22, (x))) 150#define Sigma1_256(x) (S32(6, (x)) ^ S32(11, (x)) ^ S32(25, (x))) 151#define sigma0_256(x) (S32(7, (x)) ^ S32(18, (x)) ^ R(3 , (x))) 152#define sigma1_256(x) (S32(17, (x)) ^ S32(19, (x)) ^ R(10, (x))) 153 154/* Four of six logical functions used in SHA-384 and SHA-512: */ 155#define Sigma0_512(x) (S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x))) 156#define Sigma1_512(x) (S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x))) 157#define sigma0_512(x) (S64( 1, (x)) ^ S64( 8, (x)) ^ R( 7, (x))) 158#define sigma1_512(x) (S64(19, (x)) ^ S64(61, (x)) ^ R( 6, (x))) 159 160/*** INTERNAL FUNCTION PROTOTYPES *************************************/ 161/* NOTE: These should not be accessed directly from outside this 162 * library -- they are intended for private internal visibility/use 163 * only. 164 */ 165static void SHA512_Last(SHA512_CTX *); 166void SHA224_Transform(SHA224_CTX *, const uint32_t*); 167void SHA256_Transform(SHA256_CTX *, const uint32_t*); 168void SHA384_Transform(SHA384_CTX *, const uint64_t*); 169void SHA512_Transform(SHA512_CTX *, const uint64_t*); 170 171 172/*** SHA-XYZ INITIAL HASH VALUES AND CONSTANTS ************************/ 173/* Hash constant words K for SHA-256: */ 174static const uint32_t K256[64] = { 175 0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL, 176 0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL, 177 0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL, 178 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL, 179 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL, 180 0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL, 181 0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL, 182 0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL, 183 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL, 184 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL, 185 0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL, 186 0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL, 187 0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL, 188 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL, 189 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL, 190 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL 191}; 192 193/* Initial hash value H for SHA-224: */ 194static const uint32_t sha224_initial_hash_value[8] = { 195 0xc1059ed8UL, 196 0x367cd507UL, 197 0x3070dd17UL, 198 0xf70e5939UL, 199 0xffc00b31UL, 200 0x68581511UL, 201 0x64f98fa7UL, 202 0xbefa4fa4UL 203}; 204 205/* Initial hash value H for SHA-256: */ 206static const uint32_t sha256_initial_hash_value[8] = { 207 0x6a09e667UL, 208 0xbb67ae85UL, 209 0x3c6ef372UL, 210 0xa54ff53aUL, 211 0x510e527fUL, 212 0x9b05688cUL, 213 0x1f83d9abUL, 214 0x5be0cd19UL 215}; 216 217/* Hash constant words K for SHA-384 and SHA-512: */ 218static const uint64_t K512[80] = { 219 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 220 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL, 221 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 222 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 223 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, 224 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, 225 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 226 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL, 227 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 228 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 229 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, 230 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, 231 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 232 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL, 233 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 234 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 235 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, 236 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, 237 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 238 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL, 239 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 240 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 241 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, 242 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, 243 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 244 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL, 245 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 246 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 247 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, 248 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, 249 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 250 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL, 251 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 252 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 253 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, 254 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, 255 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 256 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL, 257 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 258 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL 259}; 260 261/* Initial hash value H for SHA-384 */ 262static const uint64_t sha384_initial_hash_value[8] = { 263 0xcbbb9d5dc1059ed8ULL, 264 0x629a292a367cd507ULL, 265 0x9159015a3070dd17ULL, 266 0x152fecd8f70e5939ULL, 267 0x67332667ffc00b31ULL, 268 0x8eb44a8768581511ULL, 269 0xdb0c2e0d64f98fa7ULL, 270 0x47b5481dbefa4fa4ULL 271}; 272 273/* Initial hash value H for SHA-512 */ 274static const uint64_t sha512_initial_hash_value[8] = { 275 0x6a09e667f3bcc908ULL, 276 0xbb67ae8584caa73bULL, 277 0x3c6ef372fe94f82bULL, 278 0xa54ff53a5f1d36f1ULL, 279 0x510e527fade682d1ULL, 280 0x9b05688c2b3e6c1fULL, 281 0x1f83d9abfb41bd6bULL, 282 0x5be0cd19137e2179ULL 283}; 284 285#if !defined(_KERNEL) && !defined(_STANDALONE) 286#if defined(__weak_alias) 287__weak_alias(SHA224_Init,_SHA224_Init) 288__weak_alias(SHA224_Update,_SHA224_Update) 289__weak_alias(SHA224_Final,_SHA224_Final) 290__weak_alias(SHA224_Transform,_SHA224_Transform) 291 292__weak_alias(SHA256_Init,_SHA256_Init) 293__weak_alias(SHA256_Update,_SHA256_Update) 294__weak_alias(SHA256_Final,_SHA256_Final) 295__weak_alias(SHA256_Transform,_SHA256_Transform) 296 297__weak_alias(SHA384_Init,_SHA384_Init) 298__weak_alias(SHA384_Update,_SHA384_Update) 299__weak_alias(SHA384_Final,_SHA384_Final) 300__weak_alias(SHA384_Transform,_SHA384_Transform) 301 302__weak_alias(SHA512_Init,_SHA512_Init) 303__weak_alias(SHA512_Update,_SHA512_Update) 304__weak_alias(SHA512_Final,_SHA512_Final) 305__weak_alias(SHA512_Transform,_SHA512_Transform) 306#endif 307#endif 308 309/*** SHA-256: *********************************************************/ 310int 311SHA256_Init(SHA256_CTX *context) 312{ 313 if (context == NULL) 314 return 1; 315 316 memcpy(context->state, sha256_initial_hash_value, 317 (size_t)(SHA256_DIGEST_LENGTH)); 318 memset(context->buffer, 0, (size_t)(SHA256_BLOCK_LENGTH)); 319 context->bitcount = 0; 320 321 return 1; 322} 323 324#ifdef SHA2_UNROLL_TRANSFORM 325 326/* Unrolled SHA-256 round macros: */ 327 328#define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \ 329 W256[j] = be32toh(*data); \ 330 ++data; \ 331 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \ 332 K256[j] + W256[j]; \ 333 (d) += T1; \ 334 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \ 335 j++ 336 337#define ROUND256(a,b,c,d,e,f,g,h) \ 338 s0 = W256[(j+1)&0x0f]; \ 339 s0 = sigma0_256(s0); \ 340 s1 = W256[(j+14)&0x0f]; \ 341 s1 = sigma1_256(s1); \ 342 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + K256[j] + \ 343 (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0); \ 344 (d) += T1; \ 345 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \ 346 j++ 347 348void 349SHA256_Transform(SHA256_CTX *context, const uint32_t *data) 350{ 351 uint32_t a, b, c, d, e, f, g, h, s0, s1; 352 uint32_t T1, *W256; 353 int j; 354 355 W256 = (uint32_t *)context->buffer; 356 357 /* Initialize registers with the prev. intermediate value */ 358 a = context->state[0]; 359 b = context->state[1]; 360 c = context->state[2]; 361 d = context->state[3]; 362 e = context->state[4]; 363 f = context->state[5]; 364 g = context->state[6]; 365 h = context->state[7]; 366 367 j = 0; 368 do { 369 /* Rounds 0 to 15 (unrolled): */ 370 ROUND256_0_TO_15(a,b,c,d,e,f,g,h); 371 ROUND256_0_TO_15(h,a,b,c,d,e,f,g); 372 ROUND256_0_TO_15(g,h,a,b,c,d,e,f); 373 ROUND256_0_TO_15(f,g,h,a,b,c,d,e); 374 ROUND256_0_TO_15(e,f,g,h,a,b,c,d); 375 ROUND256_0_TO_15(d,e,f,g,h,a,b,c); 376 ROUND256_0_TO_15(c,d,e,f,g,h,a,b); 377 ROUND256_0_TO_15(b,c,d,e,f,g,h,a); 378 } while (j < 16); 379 380 /* Now for the remaining rounds to 64: */ 381 do { 382 ROUND256(a,b,c,d,e,f,g,h); 383 ROUND256(h,a,b,c,d,e,f,g); 384 ROUND256(g,h,a,b,c,d,e,f); 385 ROUND256(f,g,h,a,b,c,d,e); 386 ROUND256(e,f,g,h,a,b,c,d); 387 ROUND256(d,e,f,g,h,a,b,c); 388 ROUND256(c,d,e,f,g,h,a,b); 389 ROUND256(b,c,d,e,f,g,h,a); 390 } while (j < 64); 391 392 /* Compute the current intermediate hash value */ 393 context->state[0] += a; 394 context->state[1] += b; 395 context->state[2] += c; 396 context->state[3] += d; 397 context->state[4] += e; 398 context->state[5] += f; 399 context->state[6] += g; 400 context->state[7] += h; 401 402 /* Clean up */ 403 a = b = c = d = e = f = g = h = T1 = 0; 404} 405 406#else /* SHA2_UNROLL_TRANSFORM */ 407 408void 409SHA256_Transform(SHA256_CTX *context, const uint32_t *data) 410{ 411 uint32_t a, b, c, d, e, f, g, h, s0, s1; 412 uint32_t T1, T2, *W256; 413 int j; 414 415 W256 = (uint32_t *)(void *)context->buffer; 416 417 /* Initialize registers with the prev. intermediate value */ 418 a = context->state[0]; 419 b = context->state[1]; 420 c = context->state[2]; 421 d = context->state[3]; 422 e = context->state[4]; 423 f = context->state[5]; 424 g = context->state[6]; 425 h = context->state[7]; 426 427 j = 0; 428 do { 429 W256[j] = be32toh(*data); 430 ++data; 431 /* Apply the SHA-256 compression function to update a..h */ 432 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + W256[j]; 433 T2 = Sigma0_256(a) + Maj(a, b, c); 434 h = g; 435 g = f; 436 f = e; 437 e = d + T1; 438 d = c; 439 c = b; 440 b = a; 441 a = T1 + T2; 442 443 j++; 444 } while (j < 16); 445 446 do { 447 /* Part of the message block expansion: */ 448 s0 = W256[(j+1)&0x0f]; 449 s0 = sigma0_256(s0); 450 s1 = W256[(j+14)&0x0f]; 451 s1 = sigma1_256(s1); 452 453 /* Apply the SHA-256 compression function to update a..h */ 454 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + 455 (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0); 456 T2 = Sigma0_256(a) + Maj(a, b, c); 457 h = g; 458 g = f; 459 f = e; 460 e = d + T1; 461 d = c; 462 c = b; 463 b = a; 464 a = T1 + T2; 465 466 j++; 467 } while (j < 64); 468 469 /* Compute the current intermediate hash value */ 470 context->state[0] += a; 471 context->state[1] += b; 472 context->state[2] += c; 473 context->state[3] += d; 474 context->state[4] += e; 475 context->state[5] += f; 476 context->state[6] += g; 477 context->state[7] += h; 478 479 /* Clean up */ 480 a = b = c = d = e = f = g = h = T1 = T2 = 0; 481} 482 483#endif /* SHA2_UNROLL_TRANSFORM */ 484 485int 486SHA256_Update(SHA256_CTX *context, const uint8_t *data, size_t len) 487{ 488 unsigned int freespace, usedspace; 489 490 if (len == 0) { 491 /* Calling with no data is valid - we do nothing */ 492 return 1; 493 } 494 495 usedspace = (unsigned int)((context->bitcount >> 3) % 496 SHA256_BLOCK_LENGTH); 497 if (usedspace > 0) { 498 /* Calculate how much free space is available in the buffer */ 499 freespace = SHA256_BLOCK_LENGTH - usedspace; 500 501 if (len >= freespace) { 502 /* Fill the buffer completely and process it */ 503 memcpy(&context->buffer[usedspace], data, 504 (size_t)(freespace)); 505 context->bitcount += freespace << 3; 506 len -= freespace; 507 data += freespace; 508 SHA256_Transform(context, 509 (uint32_t *)(void *)context->buffer); 510 } else { 511 /* The buffer is not yet full */ 512 memcpy(&context->buffer[usedspace], data, len); 513 context->bitcount += len << 3; 514 /* Clean up: */ 515 usedspace = freespace = 0; 516 return 1; 517 } 518 } 519 /* 520 * Process as many complete blocks as possible. 521 * 522 * Check alignment of the data pointer. If it is 32bit aligned, 523 * SHA256_Transform can be called directly on the data stream, 524 * otherwise enforce the alignment by copy into the buffer. 525 */ 526 if ((uintptr_t)data % 4 == 0) { 527 while (len >= SHA256_BLOCK_LENGTH) { 528 SHA256_Transform(context, 529 (const uint32_t *)(const void *)data); 530 context->bitcount += SHA256_BLOCK_LENGTH << 3; 531 len -= SHA256_BLOCK_LENGTH; 532 data += SHA256_BLOCK_LENGTH; 533 } 534 } else { 535 while (len >= SHA256_BLOCK_LENGTH) { 536 memcpy(context->buffer, data, SHA256_BLOCK_LENGTH); 537 SHA256_Transform(context, 538 (const uint32_t *)(const void *)context->buffer); 539 context->bitcount += SHA256_BLOCK_LENGTH << 3; 540 len -= SHA256_BLOCK_LENGTH; 541 data += SHA256_BLOCK_LENGTH; 542 } 543 } 544 if (len > 0) { 545 /* There's left-overs, so save 'em */ 546 memcpy(context->buffer, data, len); 547 context->bitcount += len << 3; 548 } 549 /* Clean up: */ 550 usedspace = freespace = 0; 551 552 return 1; 553} 554 555static int 556SHA224_256_Final(uint8_t digest[], SHA256_CTX *context, size_t len) 557{ 558 unsigned int usedspace; 559 size_t i; 560 561 /* If no digest buffer is passed, we don't bother doing this: */ 562 if (digest != NULL) { 563 usedspace = (unsigned int)((context->bitcount >> 3) % 564 SHA256_BLOCK_LENGTH); 565 context->bitcount = htobe64(context->bitcount); 566 if (usedspace > 0) { 567 /* Begin padding with a 1 bit: */ 568 context->buffer[usedspace++] = 0x80; 569 570 if (usedspace <= SHA256_SHORT_BLOCK_LENGTH) { 571 /* Set-up for the last transform: */ 572 memset(&context->buffer[usedspace], 0, 573 (size_t)(SHA256_SHORT_BLOCK_LENGTH - 574 usedspace)); 575 } else { 576 if (usedspace < SHA256_BLOCK_LENGTH) { 577 memset(&context->buffer[usedspace], 0, 578 (size_t)(SHA256_BLOCK_LENGTH - 579 usedspace)); 580 } 581 /* Do second-to-last transform: */ 582 SHA256_Transform(context, 583 (uint32_t *)(void *)context->buffer); 584 585 /* And set-up for the last transform: */ 586 memset(context->buffer, 0, 587 (size_t)(SHA256_SHORT_BLOCK_LENGTH)); 588 } 589 } else { 590 /* Set-up for the last transform: */ 591 memset(context->buffer, 0, 592 (size_t)(SHA256_SHORT_BLOCK_LENGTH)); 593 594 /* Begin padding with a 1 bit: */ 595 *context->buffer = 0x80; 596 } 597 /* Set the bit count: */ 598 memcpy(&context->buffer[SHA256_SHORT_BLOCK_LENGTH], 599 &context->bitcount, sizeof(context->bitcount)); 600 601 /* Final transform: */ 602 SHA256_Transform(context, (uint32_t *)(void *)context->buffer); 603 604 for (i = 0; i < len / 4; i++) 605 be32enc(digest + 4 * i, context->state[i]); 606 } 607 608 /* Clean up state data: */ 609 memset(context, 0, sizeof(*context)); 610 usedspace = 0; 611 612 return 1; 613} 614 615int 616SHA256_Final(uint8_t digest[], SHA256_CTX *context) 617{ 618 return SHA224_256_Final(digest, context, SHA256_DIGEST_LENGTH); 619} 620 621/*** SHA-224: *********************************************************/ 622int 623SHA224_Init(SHA224_CTX *context) 624{ 625 if (context == NULL) 626 return 1; 627 628 /* The state and buffer size are driven by SHA256, not by SHA224. */ 629 memcpy(context->state, sha224_initial_hash_value, 630 (size_t)(SHA256_DIGEST_LENGTH)); 631 memset(context->buffer, 0, (size_t)(SHA256_BLOCK_LENGTH)); 632 context->bitcount = 0; 633 634 return 1; 635} 636 637int 638SHA224_Update(SHA224_CTX *context, const uint8_t *data, size_t len) 639{ 640 return SHA256_Update((SHA256_CTX *)context, data, len); 641} 642 643void 644SHA224_Transform(SHA224_CTX *context, const uint32_t *data) 645{ 646 SHA256_Transform((SHA256_CTX *)context, data); 647} 648 649int 650SHA224_Final(uint8_t digest[], SHA224_CTX *context) 651{ 652 return SHA224_256_Final(digest, (SHA256_CTX *)context, 653 SHA224_DIGEST_LENGTH); 654} 655 656/*** SHA-512: *********************************************************/ 657int 658SHA512_Init(SHA512_CTX *context) 659{ 660 if (context == NULL) 661 return 1; 662 663 memcpy(context->state, sha512_initial_hash_value, 664 (size_t)(SHA512_DIGEST_LENGTH)); 665 memset(context->buffer, 0, (size_t)(SHA512_BLOCK_LENGTH)); 666 context->bitcount[0] = context->bitcount[1] = 0; 667 668 return 1; 669} 670 671#ifdef SHA2_UNROLL_TRANSFORM 672 673/* Unrolled SHA-512 round macros: */ 674#define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \ 675 W512[j] = be64toh(*data); \ 676 ++data; \ 677 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \ 678 K512[j] + W512[j]; \ 679 (d) += T1, \ 680 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)), \ 681 j++ 682 683#define ROUND512(a,b,c,d,e,f,g,h) \ 684 s0 = W512[(j+1)&0x0f]; \ 685 s0 = sigma0_512(s0); \ 686 s1 = W512[(j+14)&0x0f]; \ 687 s1 = sigma1_512(s1); \ 688 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + K512[j] + \ 689 (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0); \ 690 (d) += T1; \ 691 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \ 692 j++ 693 694void 695SHA512_Transform(SHA512_CTX *context, const uint64_t *data) 696{ 697 uint64_t a, b, c, d, e, f, g, h, s0, s1; 698 uint64_t T1, *W512 = (uint64_t *)context->buffer; 699 int j; 700 701 /* Initialize registers with the prev. intermediate value */ 702 a = context->state[0]; 703 b = context->state[1]; 704 c = context->state[2]; 705 d = context->state[3]; 706 e = context->state[4]; 707 f = context->state[5]; 708 g = context->state[6]; 709 h = context->state[7]; 710 711 j = 0; 712 do { 713 ROUND512_0_TO_15(a,b,c,d,e,f,g,h); 714 ROUND512_0_TO_15(h,a,b,c,d,e,f,g); 715 ROUND512_0_TO_15(g,h,a,b,c,d,e,f); 716 ROUND512_0_TO_15(f,g,h,a,b,c,d,e); 717 ROUND512_0_TO_15(e,f,g,h,a,b,c,d); 718 ROUND512_0_TO_15(d,e,f,g,h,a,b,c); 719 ROUND512_0_TO_15(c,d,e,f,g,h,a,b); 720 ROUND512_0_TO_15(b,c,d,e,f,g,h,a); 721 } while (j < 16); 722 723 /* Now for the remaining rounds up to 79: */ 724 do { 725 ROUND512(a,b,c,d,e,f,g,h); 726 ROUND512(h,a,b,c,d,e,f,g); 727 ROUND512(g,h,a,b,c,d,e,f); 728 ROUND512(f,g,h,a,b,c,d,e); 729 ROUND512(e,f,g,h,a,b,c,d); 730 ROUND512(d,e,f,g,h,a,b,c); 731 ROUND512(c,d,e,f,g,h,a,b); 732 ROUND512(b,c,d,e,f,g,h,a); 733 } while (j < 80); 734 735 /* Compute the current intermediate hash value */ 736 context->state[0] += a; 737 context->state[1] += b; 738 context->state[2] += c; 739 context->state[3] += d; 740 context->state[4] += e; 741 context->state[5] += f; 742 context->state[6] += g; 743 context->state[7] += h; 744 745 /* Clean up */ 746 a = b = c = d = e = f = g = h = T1 = 0; 747} 748 749#else /* SHA2_UNROLL_TRANSFORM */ 750 751void 752SHA512_Transform(SHA512_CTX *context, const uint64_t *data) 753{ 754 uint64_t a, b, c, d, e, f, g, h, s0, s1; 755 uint64_t T1, T2, *W512 = (void *)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 W512[j] = be64toh(*data); 771 ++data; 772 /* Apply the SHA-512 compression function to update a..h */ 773 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + W512[j]; 774 T2 = Sigma0_512(a) + Maj(a, b, c); 775 h = g; 776 g = f; 777 f = e; 778 e = d + T1; 779 d = c; 780 c = b; 781 b = a; 782 a = T1 + T2; 783 784 j++; 785 } while (j < 16); 786 787 do { 788 /* Part of the message block expansion: */ 789 s0 = W512[(j+1)&0x0f]; 790 s0 = sigma0_512(s0); 791 s1 = W512[(j+14)&0x0f]; 792 s1 = sigma1_512(s1); 793 794 /* Apply the SHA-512 compression function to update a..h */ 795 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + 796 (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0); 797 T2 = Sigma0_512(a) + Maj(a, b, c); 798 h = g; 799 g = f; 800 f = e; 801 e = d + T1; 802 d = c; 803 c = b; 804 b = a; 805 a = T1 + T2; 806 807 j++; 808 } while (j < 80); 809 810 /* Compute the current intermediate hash value */ 811 context->state[0] += a; 812 context->state[1] += b; 813 context->state[2] += c; 814 context->state[3] += d; 815 context->state[4] += e; 816 context->state[5] += f; 817 context->state[6] += g; 818 context->state[7] += h; 819 820 /* Clean up */ 821 a = b = c = d = e = f = g = h = T1 = T2 = 0; 822} 823 824#endif /* SHA2_UNROLL_TRANSFORM */ 825 826int 827SHA512_Update(SHA512_CTX *context, const uint8_t *data, size_t len) 828{ 829 unsigned int freespace, usedspace; 830 831 if (len == 0) { 832 /* Calling with no data is valid - we do nothing */ 833 return 1; 834 } 835 836 usedspace = (unsigned int)((context->bitcount[0] >> 3) % 837 SHA512_BLOCK_LENGTH); 838 if (usedspace > 0) { 839 /* Calculate how much free space is available in the buffer */ 840 freespace = SHA512_BLOCK_LENGTH - usedspace; 841 842 if (len >= freespace) { 843 /* Fill the buffer completely and process it */ 844 memcpy(&context->buffer[usedspace], data, 845 (size_t)(freespace)); 846 ADDINC128(context->bitcount, freespace << 3); 847 len -= freespace; 848 data += freespace; 849 SHA512_Transform(context, 850 (uint64_t *)(void *)context->buffer); 851 } else { 852 /* The buffer is not yet full */ 853 memcpy(&context->buffer[usedspace], data, len); 854 ADDINC128(context->bitcount, len << 3); 855 /* Clean up: */ 856 usedspace = freespace = 0; 857 return 1; 858 } 859 } 860 /* 861 * Process as many complete blocks as possible. 862 * 863 * Check alignment of the data pointer. If it is 64bit aligned, 864 * SHA512_Transform can be called directly on the data stream, 865 * otherwise enforce the alignment by copy into the buffer. 866 */ 867 if ((uintptr_t)data % 8 == 0) { 868 while (len >= SHA512_BLOCK_LENGTH) { 869 SHA512_Transform(context, 870 (const uint64_t*)(const void *)data); 871 ADDINC128(context->bitcount, SHA512_BLOCK_LENGTH << 3); 872 len -= SHA512_BLOCK_LENGTH; 873 data += SHA512_BLOCK_LENGTH; 874 } 875 } else { 876 while (len >= SHA512_BLOCK_LENGTH) { 877 memcpy(context->buffer, data, SHA512_BLOCK_LENGTH); 878 SHA512_Transform(context, 879 (const void *)context->buffer); 880 ADDINC128(context->bitcount, SHA512_BLOCK_LENGTH << 3); 881 len -= SHA512_BLOCK_LENGTH; 882 data += SHA512_BLOCK_LENGTH; 883 } 884 } 885 if (len > 0) { 886 /* There's left-overs, so save 'em */ 887 memcpy(context->buffer, data, len); 888 ADDINC128(context->bitcount, len << 3); 889 } 890 /* Clean up: */ 891 usedspace = freespace = 0; 892 893 return 1; 894} 895 896static void 897SHA512_Last(SHA512_CTX *context) 898{ 899 unsigned int usedspace; 900 901 usedspace = (unsigned int)((context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH); 902 context->bitcount[0] = htobe64(context->bitcount[0]); 903 context->bitcount[1] = htobe64(context->bitcount[1]); 904 if (usedspace > 0) { 905 /* Begin padding with a 1 bit: */ 906 context->buffer[usedspace++] = 0x80; 907 908 if (usedspace <= SHA512_SHORT_BLOCK_LENGTH) { 909 /* Set-up for the last transform: */ 910 memset(&context->buffer[usedspace], 0, 911 (size_t)(SHA512_SHORT_BLOCK_LENGTH - usedspace)); 912 } else { 913 if (usedspace < SHA512_BLOCK_LENGTH) { 914 memset(&context->buffer[usedspace], 0, 915 (size_t)(SHA512_BLOCK_LENGTH - usedspace)); 916 } 917 /* Do second-to-last transform: */ 918 SHA512_Transform(context, 919 (uint64_t *)(void *)context->buffer); 920 921 /* And set-up for the last transform: */ 922 memset(context->buffer, 0, 923 (size_t)(SHA512_BLOCK_LENGTH - 2)); 924 } 925 } else { 926 /* Prepare for final transform: */ 927 memset(context->buffer, 0, (size_t)(SHA512_SHORT_BLOCK_LENGTH)); 928 929 /* Begin padding with a 1 bit: */ 930 *context->buffer = 0x80; 931 } 932 /* Store the length of input data (in bits): */ 933 memcpy(&context->buffer[SHA512_SHORT_BLOCK_LENGTH], 934 &context->bitcount[1], sizeof(context->bitcount[1])); 935 memcpy(&context->buffer[SHA512_SHORT_BLOCK_LENGTH + 8], 936 &context->bitcount[0], sizeof(context->bitcount[0])); 937 938 /* Final transform: */ 939 SHA512_Transform(context, (uint64_t *)(void *)context->buffer); 940} 941 942int 943SHA512_Final(uint8_t digest[], SHA512_CTX *context) 944{ 945 size_t i; 946 947 /* If no digest buffer is passed, we don't bother doing this: */ 948 if (digest != NULL) { 949 SHA512_Last(context); 950 951 /* Save the hash data for output: */ 952 for (i = 0; i < 8; ++i) 953 be64enc(digest + 8 * i, context->state[i]); 954 } 955 956 /* Zero out state data */ 957 memset(context, 0, sizeof(*context)); 958 959 return 1; 960} 961 962/*** SHA-384: *********************************************************/ 963int 964SHA384_Init(SHA384_CTX *context) 965{ 966 if (context == NULL) 967 return 1; 968 969 memcpy(context->state, sha384_initial_hash_value, 970 (size_t)(SHA512_DIGEST_LENGTH)); 971 memset(context->buffer, 0, (size_t)(SHA384_BLOCK_LENGTH)); 972 context->bitcount[0] = context->bitcount[1] = 0; 973 974 return 1; 975} 976 977int 978SHA384_Update(SHA384_CTX *context, const uint8_t *data, size_t len) 979{ 980 return SHA512_Update((SHA512_CTX *)context, data, len); 981} 982 983void 984SHA384_Transform(SHA512_CTX *context, const uint64_t *data) 985{ 986 SHA512_Transform((SHA512_CTX *)context, data); 987} 988 989int 990SHA384_Final(uint8_t digest[], SHA384_CTX *context) 991{ 992 size_t i; 993 994 /* If no digest buffer is passed, we don't bother doing this: */ 995 if (digest != NULL) { 996 SHA512_Last((SHA512_CTX *)context); 997 998 /* Save the hash data for output: */ 999 for (i = 0; i < 6; ++i) 1000 be64enc(digest + 8 * i, context->state[i]); 1001 } 1002 1003 /* Zero out state data */ 1004 memset(context, 0, sizeof(*context)); 1005 1006 return 1; 1007} 1008