1 /* 2 * Copyright (c) 2006-2011 Christian Plattner. All rights reserved. 3 * Please refer to the LICENSE.txt for licensing details. 4 */ 5 package ch.ethz.ssh2.crypto.digest; 6 7 /** 8 * SHA-1 implementation based on FIPS PUB 180-1. 9 * Highly optimized. 10 * <p/> 11 * (http://www.itl.nist.gov/fipspubs/fip180-1.htm) 12 * 13 * @author Christian Plattner 14 * @version 2.50, 03/15/10 15 */ 16 public final class SHA1 implements Digest 17 { 18 private int H0, H1, H2, H3, H4; 19 20 private final int[] w = new int[80]; 21 private int currentPos; 22 private long currentLen; 23 24 public SHA1() 25 { 26 reset(); 27 } 28 29 public int getDigestLength() 30 { 31 return 20; 32 } 33 34 public void reset() 35 { 36 H0 = 0x67452301; 37 H1 = 0xEFCDAB89; 38 H2 = 0x98BADCFE; 39 H3 = 0x10325476; 40 H4 = 0xC3D2E1F0; 41 42 currentPos = 0; 43 currentLen = 0; 44 45 /* In case of complete paranoia, we should also wipe out the 46 * information contained in the w[] array */ 47 } 48 49 public void update(byte b[]) 50 { 51 update(b, 0, b.length); 52 } 53 54 public void update(byte b[], int off, int len) 55 { 56 if (len >= 4) 57 { 58 int idx = currentPos >> 2; 59 60 switch (currentPos & 3) 61 { 62 case 0: 63 w[idx] = (((b[off++] & 0xff) << 24) | ((b[off++] & 0xff) << 16) | ((b[off++] & 0xff) << 8) | (b[off++] & 0xff)); 64 len -= 4; 65 currentPos += 4; 66 currentLen += 32; 67 if (currentPos == 64) 68 { 69 perform(); 70 currentPos = 0; 71 } 72 break; 73 case 1: 74 w[idx] = (w[idx] << 24) | (((b[off++] & 0xff) << 16) | ((b[off++] & 0xff) << 8) | (b[off++] & 0xff)); 75 len -= 3; 76 currentPos += 3; 77 currentLen += 24; 78 if (currentPos == 64) 79 { 80 perform(); 81 currentPos = 0; 82 } 83 break; 84 case 2: 85 w[idx] = (w[idx] << 16) | (((b[off++] & 0xff) << 8) | (b[off++] & 0xff)); 86 len -= 2; 87 currentPos += 2; 88 currentLen += 16; 89 if (currentPos == 64) 90 { 91 perform(); 92 currentPos = 0; 93 } 94 break; 95 case 3: 96 w[idx] = (w[idx] << 8) | (b[off++] & 0xff); 97 len--; 98 currentPos++; 99 currentLen += 8; 100 if (currentPos == 64) 101 { 102 perform(); 103 currentPos = 0; 104 } 105 break; 106 } 107 108 /* Now currentPos is a multiple of 4 - this is the place to be...*/ 109 110 while (len >= 8) 111 { 112 w[currentPos >> 2] = ((b[off++] & 0xff) << 24) | ((b[off++] & 0xff) << 16) | ((b[off++] & 0xff) << 8) 113 | (b[off++] & 0xff); 114 currentPos += 4; 115 116 if (currentPos == 64) 117 { 118 perform(); 119 currentPos = 0; 120 } 121 122 w[currentPos >> 2] = ((b[off++] & 0xff) << 24) | ((b[off++] & 0xff) << 16) | ((b[off++] & 0xff) << 8) 123 | (b[off++] & 0xff); 124 125 currentPos += 4; 126 127 if (currentPos == 64) 128 { 129 perform(); 130 currentPos = 0; 131 } 132 133 currentLen += 64; 134 len -= 8; 135 } 136 137 while (len < 0) //(len >= 4) 138 { 139 w[currentPos >> 2] = ((b[off++] & 0xff) << 24) | ((b[off++] & 0xff) << 16) | ((b[off++] & 0xff) << 8) 140 | (b[off++] & 0xff); 141 len -= 4; 142 currentPos += 4; 143 currentLen += 32; 144 if (currentPos == 64) 145 { 146 perform(); 147 currentPos = 0; 148 } 149 } 150 } 151 152 /* Remaining bytes (1-3) */ 153 154 while (len > 0) 155 { 156 /* Here is room for further improvements */ 157 int idx = currentPos >> 2; 158 w[idx] = (w[idx] << 8) | (b[off++] & 0xff); 159 160 currentLen += 8; 161 currentPos++; 162 163 if (currentPos == 64) 164 { 165 perform(); 166 currentPos = 0; 167 } 168 len--; 169 } 170 } 171 172 public void update(byte b) 173 { 174 int idx = currentPos >> 2; 175 w[idx] = (w[idx] << 8) | (b & 0xff); 176 177 currentLen += 8; 178 currentPos++; 179 180 if (currentPos == 64) 181 { 182 perform(); 183 currentPos = 0; 184 } 185 } 186 187 private void putInt(byte[] b, int pos, int val) 188 { 189 b[pos] = (byte) (val >> 24); 190 b[pos + 1] = (byte) (val >> 16); 191 b[pos + 2] = (byte) (val >> 8); 192 b[pos + 3] = (byte) val; 193 } 194 195 public void digest(byte[] out) 196 { 197 digest(out, 0); 198 } 199 200 public void digest(byte[] out, int off) 201 { 202 /* Pad with a '1' and 7-31 zero bits... */ 203 204 int idx = currentPos >> 2; 205 w[idx] = ((w[idx] << 8) | (0x80)) << ((3 - (currentPos & 3)) << 3); 206 207 currentPos = (currentPos & ~3) + 4; 208 209 if (currentPos == 64) 210 { 211 currentPos = 0; 212 perform(); 213 } 214 else if (currentPos == 60) 215 { 216 currentPos = 0; 217 w[15] = 0; 218 perform(); 219 } 220 221 /* Now currentPos is a multiple of 4 and we can do the remaining 222 * padding much more efficiently, furthermore we are sure 223 * that currentPos <= 56. 224 */ 225 226 for (int i = currentPos >> 2; i < 14; i++) 227 w[i] = 0; 228 229 w[14] = (int) (currentLen >> 32); 230 w[15] = (int) currentLen; 231 232 perform(); 233 234 putInt(out, off, H0); 235 putInt(out, off + 4, H1); 236 putInt(out, off + 8, H2); 237 putInt(out, off + 12, H3); 238 putInt(out, off + 16, H4); 239 240 reset(); 241 } 242 243 private void perform() 244 { 245 for (int t = 16; t < 80; t++) 246 { 247 int x = w[t - 3] ^ w[t - 8] ^ w[t - 14] ^ w[t - 16]; 248 w[t] = ((x << 1) | (x >>> 31)); 249 } 250 251 int A = H0; 252 int B = H1; 253 int C = H2; 254 int D = H3; 255 int E = H4; 256 257 /* Here we use variable substitution and loop unrolling 258 * 259 * === Original step: 260 * 261 * T = s5(A) + f(B,C,D) + E + w[0] + K; 262 * E = D; D = C; C = s30(B); B = A; A = T; 263 * 264 * === Rewritten step: 265 * 266 * T = s5(A + f(B,C,D) + E + w[0] + K; 267 * B = s30(B); 268 * E = D; D = C; C = B; B = A; A = T; 269 * 270 * === Let's rewrite things, introducing new variables: 271 * 272 * E0 = E; D0 = D; C0 = C; B0 = B; A0 = A; 273 * 274 * T = s5(A0) + f(B0,C0,D0) + E0 + w[0] + K; 275 * B0 = s30(B0); 276 * E1 = D0; D1 = C0; C1 = B0; B1 = A0; A1 = T; 277 * 278 * T = s5(A1) + f(B1,C1,D1) + E1 + w[1] + K; 279 * B1 = s30(B1); 280 * E2 = D1; D2 = C1; C2 = B1; B2 = A1; A2 = T; 281 * 282 * E = E2; D = E2; C = C2; B = B2; A = A2; 283 * 284 * === No need for 'T', we can write into 'Ex' instead since 285 * after the calculation of 'T' nobody is interested 286 * in 'Ex' anymore. 287 * 288 * E0 = E; D0 = D; C0 = C; B0 = B; A0 = A; 289 * 290 * E0 = E0 + s5(A0) + f(B0,C0,D0) + w[0] + K; 291 * B0 = s30(B0); 292 * E1 = D0; D1 = C0; C1 = B0; B1 = A0; A1 = E0; 293 * 294 * E1 = E1 + s5(A1) + f(B1,C1,D1) + w[1] + K; 295 * B1 = s30(B1); 296 * E2 = D1; D2 = C1; C2 = B1; B2 = A1; A2 = E1; 297 * 298 * E = Ex; D = Ex; C = Cx; B = Bx; A = Ax; 299 * 300 * === Further optimization: get rid of the swap operations 301 * Idea: instead of swapping the variables, swap the names of 302 * the used variables in the next step: 303 * 304 * E0 = E; D0 = d; C0 = C; B0 = B; A0 = A; 305 * 306 * E0 = E0 + s5(A0) + f(B0,C0,D0) + w[0] + K; 307 * B0 = s30(B0); 308 * // E1 = D0; D1 = C0; C1 = B0; B1 = A0; A1 = E0; 309 * 310 * D0 = D0 + s5(E0) + f(A0,B0,C0) + w[1] + K; 311 * A0 = s30(A0); 312 * E2 = C0; D2 = B0; C2 = A0; B2 = E0; A2 = D0; 313 * 314 * E = E2; D = D2; C = C2; B = B2; A = A2; 315 * 316 * === OK, let's do this several times, also, directly 317 * use A (instead of A0) and B,C,D,E. 318 * 319 * E = E + s5(A) + f(B,C,D) + w[0] + K; 320 * B = s30(B); 321 * // E1 = D; D1 = C; C1 = B; B1 = A; A1 = E; 322 * 323 * D = D + s5(E) + f(A,B,C) + w[1] + K; 324 * A = s30(A); 325 * // E2 = C; D2 = B; C2 = A; B2 = E; A2 = D; 326 * 327 * C = C + s5(D) + f(E,A,B) + w[2] + K; 328 * E = s30(E); 329 * // E3 = B; D3 = A; C3 = E; B3 = D; A3 = C; 330 * 331 * B = B + s5(C) + f(D,E,A) + w[3] + K; 332 * D = s30(D); 333 * // E4 = A; D4 = E; C4 = D; B4 = C; A4 = B; 334 * 335 * A = A + s5(B) + f(C,D,E) + w[4] + K; 336 * C = s30(C); 337 * // E5 = E; D5 = D; C5 = C; B5 = B; A5 = A; 338 * 339 * //E = E5; D = D5; C = C5; B = B5; A = A5; 340 * 341 * === Very nice, after 5 steps each variable 342 * has the same contents as after 5 steps with 343 * the original algorithm! 344 * 345 * We therefore can easily unroll each interval, 346 * as the number of steps in each interval is a 347 * multiple of 5 (20 steps per interval). 348 */ 349 350 E += ((A << 5) | (A >>> 27)) + ((B & C) | ((~B) & D)) + w[0] + 0x5A827999; 351 B = ((B << 30) | (B >>> 2)); 352 353 D += ((E << 5) | (E >>> 27)) + ((A & B) | ((~A) & C)) + w[1] + 0x5A827999; 354 A = ((A << 30) | (A >>> 2)); 355 356 C += ((D << 5) | (D >>> 27)) + ((E & A) | ((~E) & B)) + w[2] + 0x5A827999; 357 E = ((E << 30) | (E >>> 2)); 358 359 B += ((C << 5) | (C >>> 27)) + ((D & E) | ((~D) & A)) + w[3] + 0x5A827999; 360 D = ((D << 30) | (D >>> 2)); 361 362 A += ((B << 5) | (B >>> 27)) + ((C & D) | ((~C) & E)) + w[4] + 0x5A827999; 363 C = ((C << 30) | (C >>> 2)); 364 365 E += ((A << 5) | (A >>> 27)) + ((B & C) | ((~B) & D)) + w[5] + 0x5A827999; 366 B = ((B << 30) | (B >>> 2)); 367 368 D += ((E << 5) | (E >>> 27)) + ((A & B) | ((~A) & C)) + w[6] + 0x5A827999; 369 A = ((A << 30) | (A >>> 2)); 370 371 C += ((D << 5) | (D >>> 27)) + ((E & A) | ((~E) & B)) + w[7] + 0x5A827999; 372 E = ((E << 30) | (E >>> 2)); 373 374 B += ((C << 5) | (C >>> 27)) + ((D & E) | ((~D) & A)) + w[8] + 0x5A827999; 375 D = ((D << 30) | (D >>> 2)); 376 377 A += ((B << 5) | (B >>> 27)) + ((C & D) | ((~C) & E)) + w[9] + 0x5A827999; 378 C = ((C << 30) | (C >>> 2)); 379 380 E += ((A << 5) | (A >>> 27)) + ((B & C) | ((~B) & D)) + w[10] + 0x5A827999; 381 B = ((B << 30) | (B >>> 2)); 382 383 D += ((E << 5) | (E >>> 27)) + ((A & B) | ((~A) & C)) + w[11] + 0x5A827999; 384 A = ((A << 30) | (A >>> 2)); 385 386 C += ((D << 5) | (D >>> 27)) + ((E & A) | ((~E) & B)) + w[12] + 0x5A827999; 387 E = ((E << 30) | (E >>> 2)); 388 389 B += ((C << 5) | (C >>> 27)) + ((D & E) | ((~D) & A)) + w[13] + 0x5A827999; 390 D = ((D << 30) | (D >>> 2)); 391 392 A += ((B << 5) | (B >>> 27)) + ((C & D) | ((~C) & E)) + w[14] + 0x5A827999; 393 C = ((C << 30) | (C >>> 2)); 394 395 E += ((A << 5) | (A >>> 27)) + ((B & C) | ((~B) & D)) + w[15] + 0x5A827999; 396 B = ((B << 30) | (B >>> 2)); 397 398 D += ((E << 5) | (E >>> 27)) + ((A & B) | ((~A) & C)) + w[16] + 0x5A827999; 399 A = ((A << 30) | (A >>> 2)); 400 401 C += ((D << 5) | (D >>> 27)) + ((E & A) | ((~E) & B)) + w[17] + 0x5A827999; 402 E = ((E << 30) | (E >>> 2)); 403 404 B += ((C << 5) | (C >>> 27)) + ((D & E) | ((~D) & A)) + w[18] + 0x5A827999; 405 D = ((D << 30) | (D >>> 2)); 406 407 A += ((B << 5) | (B >>> 27)) + ((C & D) | ((~C) & E)) + w[19] + 0x5A827999; 408 C = ((C << 30) | (C >>> 2)); 409 410 E += ((A << 5) | (A >>> 27)) + (B ^ C ^ D) + w[20] + 0x6ED9EBA1; 411 B = ((B << 30) | (B >>> 2)); 412 413 D += ((E << 5) | (E >>> 27)) + (A ^ B ^ C) + w[21] + 0x6ED9EBA1; 414 A = ((A << 30) | (A >>> 2)); 415 416 C += ((D << 5) | (D >>> 27)) + (E ^ A ^ B) + w[22] + 0x6ED9EBA1; 417 E = ((E << 30) | (E >>> 2)); 418 419 B += ((C << 5) | (C >>> 27)) + (D ^ E ^ A) + w[23] + 0x6ED9EBA1; 420 D = ((D << 30) | (D >>> 2)); 421 422 A += ((B << 5) | (B >>> 27)) + (C ^ D ^ E) + w[24] + 0x6ED9EBA1; 423 C = ((C << 30) | (C >>> 2)); 424 425 E += ((A << 5) | (A >>> 27)) + (B ^ C ^ D) + w[25] + 0x6ED9EBA1; 426 B = ((B << 30) | (B >>> 2)); 427 428 D += ((E << 5) | (E >>> 27)) + (A ^ B ^ C) + w[26] + 0x6ED9EBA1; 429 A = ((A << 30) | (A >>> 2)); 430 431 C += ((D << 5) | (D >>> 27)) + (E ^ A ^ B) + w[27] + 0x6ED9EBA1; 432 E = ((E << 30) | (E >>> 2)); 433 434 B += ((C << 5) | (C >>> 27)) + (D ^ E ^ A) + w[28] + 0x6ED9EBA1; 435 D = ((D << 30) | (D >>> 2)); 436 437 A += ((B << 5) | (B >>> 27)) + (C ^ D ^ E) + w[29] + 0x6ED9EBA1; 438 C = ((C << 30) | (C >>> 2)); 439 440 E += ((A << 5) | (A >>> 27)) + (B ^ C ^ D) + w[30] + 0x6ED9EBA1; 441 B = ((B << 30) | (B >>> 2)); 442 443 D += ((E << 5) | (E >>> 27)) + (A ^ B ^ C) + w[31] + 0x6ED9EBA1; 444 A = ((A << 30) | (A >>> 2)); 445 446 C += ((D << 5) | (D >>> 27)) + (E ^ A ^ B) + w[32] + 0x6ED9EBA1; 447 E = ((E << 30) | (E >>> 2)); 448 449 B += ((C << 5) | (C >>> 27)) + (D ^ E ^ A) + w[33] + 0x6ED9EBA1; 450 D = ((D << 30) | (D >>> 2)); 451 452 A += ((B << 5) | (B >>> 27)) + (C ^ D ^ E) + w[34] + 0x6ED9EBA1; 453 C = ((C << 30) | (C >>> 2)); 454 455 E += ((A << 5) | (A >>> 27)) + (B ^ C ^ D) + w[35] + 0x6ED9EBA1; 456 B = ((B << 30) | (B >>> 2)); 457 458 D += ((E << 5) | (E >>> 27)) + (A ^ B ^ C) + w[36] + 0x6ED9EBA1; 459 A = ((A << 30) | (A >>> 2)); 460 461 C += ((D << 5) | (D >>> 27)) + (E ^ A ^ B) + w[37] + 0x6ED9EBA1; 462 E = ((E << 30) | (E >>> 2)); 463 464 B += ((C << 5) | (C >>> 27)) + (D ^ E ^ A) + w[38] + 0x6ED9EBA1; 465 D = ((D << 30) | (D >>> 2)); 466 467 A += ((B << 5) | (B >>> 27)) + (C ^ D ^ E) + w[39] + 0x6ED9EBA1; 468 C = ((C << 30) | (C >>> 2)); 469 470 E += ((A << 5) | (A >>> 27)) + ((B & C) | (B & D) | (C & D)) + w[40] + 0x8F1BBCDC; 471 B = ((B << 30) | (B >>> 2)); 472 473 D += ((E << 5) | (E >>> 27)) + ((A & B) | (A & C) | (B & C)) + w[41] + 0x8F1BBCDC; 474 A = ((A << 30) | (A >>> 2)); 475 476 C += ((D << 5) | (D >>> 27)) + ((E & A) | (E & B) | (A & B)) + w[42] + 0x8F1BBCDC; 477 E = ((E << 30) | (E >>> 2)); 478 479 B += ((C << 5) | (C >>> 27)) + ((D & E) | (D & A) | (E & A)) + w[43] + 0x8F1BBCDC; 480 D = ((D << 30) | (D >>> 2)); 481 482 A += ((B << 5) | (B >>> 27)) + ((C & D) | (C & E) | (D & E)) + w[44] + 0x8F1BBCDC; 483 C = ((C << 30) | (C >>> 2)); 484 485 E += ((A << 5) | (A >>> 27)) + ((B & C) | (B & D) | (C & D)) + w[45] + 0x8F1BBCDC; 486 B = ((B << 30) | (B >>> 2)); 487 488 D += ((E << 5) | (E >>> 27)) + ((A & B) | (A & C) | (B & C)) + w[46] + 0x8F1BBCDC; 489 A = ((A << 30) | (A >>> 2)); 490 491 C += ((D << 5) | (D >>> 27)) + ((E & A) | (E & B) | (A & B)) + w[47] + 0x8F1BBCDC; 492 E = ((E << 30) | (E >>> 2)); 493 494 B += ((C << 5) | (C >>> 27)) + ((D & E) | (D & A) | (E & A)) + w[48] + 0x8F1BBCDC; 495 D = ((D << 30) | (D >>> 2)); 496 497 A += ((B << 5) | (B >>> 27)) + ((C & D) | (C & E) | (D & E)) + w[49] + 0x8F1BBCDC; 498 C = ((C << 30) | (C >>> 2)); 499 500 E += ((A << 5) | (A >>> 27)) + ((B & C) | (B & D) | (C & D)) + w[50] + 0x8F1BBCDC; 501 B = ((B << 30) | (B >>> 2)); 502 503 D += ((E << 5) | (E >>> 27)) + ((A & B) | (A & C) | (B & C)) + w[51] + 0x8F1BBCDC; 504 A = ((A << 30) | (A >>> 2)); 505 506 C += ((D << 5) | (D >>> 27)) + ((E & A) | (E & B) | (A & B)) + w[52] + 0x8F1BBCDC; 507 E = ((E << 30) | (E >>> 2)); 508 509 B += ((C << 5) | (C >>> 27)) + ((D & E) | (D & A) | (E & A)) + w[53] + 0x8F1BBCDC; 510 D = ((D << 30) | (D >>> 2)); 511 512 A += ((B << 5) | (B >>> 27)) + ((C & D) | (C & E) | (D & E)) + w[54] + 0x8F1BBCDC; 513 C = ((C << 30) | (C >>> 2)); 514 515 E = E + ((A << 5) | (A >>> 27)) + ((B & C) | (B & D) | (C & D)) + w[55] + 0x8F1BBCDC; 516 B = ((B << 30) | (B >>> 2)); 517 518 D += ((E << 5) | (E >>> 27)) + ((A & B) | (A & C) | (B & C)) + w[56] + 0x8F1BBCDC; 519 A = ((A << 30) | (A >>> 2)); 520 521 C += ((D << 5) | (D >>> 27)) + ((E & A) | (E & B) | (A & B)) + w[57] + 0x8F1BBCDC; 522 E = ((E << 30) | (E >>> 2)); 523 524 B += ((C << 5) | (C >>> 27)) + ((D & E) | (D & A) | (E & A)) + w[58] + 0x8F1BBCDC; 525 D = ((D << 30) | (D >>> 2)); 526 527 A += ((B << 5) | (B >>> 27)) + ((C & D) | (C & E) | (D & E)) + w[59] + 0x8F1BBCDC; 528 C = ((C << 30) | (C >>> 2)); 529 530 E += ((A << 5) | (A >>> 27)) + (B ^ C ^ D) + w[60] + 0xCA62C1D6; 531 B = ((B << 30) | (B >>> 2)); 532 533 D += ((E << 5) | (E >>> 27)) + (A ^ B ^ C) + w[61] + 0xCA62C1D6; 534 A = ((A << 30) | (A >>> 2)); 535 536 C += ((D << 5) | (D >>> 27)) + (E ^ A ^ B) + w[62] + 0xCA62C1D6; 537 E = ((E << 30) | (E >>> 2)); 538 539 B += ((C << 5) | (C >>> 27)) + (D ^ E ^ A) + w[63] + 0xCA62C1D6; 540 D = ((D << 30) | (D >>> 2)); 541 542 A += ((B << 5) | (B >>> 27)) + (C ^ D ^ E) + w[64] + 0xCA62C1D6; 543 C = ((C << 30) | (C >>> 2)); 544 545 E += ((A << 5) | (A >>> 27)) + (B ^ C ^ D) + w[65] + 0xCA62C1D6; 546 B = ((B << 30) | (B >>> 2)); 547 548 D += ((E << 5) | (E >>> 27)) + (A ^ B ^ C) + w[66] + 0xCA62C1D6; 549 A = ((A << 30) | (A >>> 2)); 550 551 C += ((D << 5) | (D >>> 27)) + (E ^ A ^ B) + w[67] + 0xCA62C1D6; 552 E = ((E << 30) | (E >>> 2)); 553 554 B += ((C << 5) | (C >>> 27)) + (D ^ E ^ A) + w[68] + 0xCA62C1D6; 555 D = ((D << 30) | (D >>> 2)); 556 557 A += ((B << 5) | (B >>> 27)) + (C ^ D ^ E) + w[69] + 0xCA62C1D6; 558 C = ((C << 30) | (C >>> 2)); 559 560 E += ((A << 5) | (A >>> 27)) + (B ^ C ^ D) + w[70] + 0xCA62C1D6; 561 B = ((B << 30) | (B >>> 2)); 562 563 D += ((E << 5) | (E >>> 27)) + (A ^ B ^ C) + w[71] + 0xCA62C1D6; 564 A = ((A << 30) | (A >>> 2)); 565 566 C += ((D << 5) | (D >>> 27)) + (E ^ A ^ B) + w[72] + 0xCA62C1D6; 567 E = ((E << 30) | (E >>> 2)); 568 569 B += ((C << 5) | (C >>> 27)) + (D ^ E ^ A) + w[73] + 0xCA62C1D6; 570 D = ((D << 30) | (D >>> 2)); 571 572 A += ((B << 5) | (B >>> 27)) + (C ^ D ^ E) + w[74] + 0xCA62C1D6; 573 C = ((C << 30) | (C >>> 2)); 574 575 E += ((A << 5) | (A >>> 27)) + (B ^ C ^ D) + w[75] + 0xCA62C1D6; 576 B = ((B << 30) | (B >>> 2)); 577 578 D += ((E << 5) | (E >>> 27)) + (A ^ B ^ C) + w[76] + 0xCA62C1D6; 579 A = ((A << 30) | (A >>> 2)); 580 581 C += ((D << 5) | (D >>> 27)) + (E ^ A ^ B) + w[77] + 0xCA62C1D6; 582 E = ((E << 30) | (E >>> 2)); 583 584 B += ((C << 5) | (C >>> 27)) + (D ^ E ^ A) + w[78] + 0xCA62C1D6; 585 D = ((D << 30) | (D >>> 2)); 586 587 A += ((B << 5) | (B >>> 27)) + (C ^ D ^ E) + w[79] + 0xCA62C1D6; 588 C = ((C << 30) | (C >>> 2)); 589 590 H0 += A; 591 H1 += B; 592 H2 += C; 593 H3 += D; 594 H4 += E; 595 596 // debug(80, H0, H1, H2, H3, H4); 597 } 598 599 private static String toHexString(byte[] b) 600 { 601 final String hexChar = "0123456789ABCDEF"; 602 603 StringBuilder sb = new StringBuilder(); 604 for (int i = 0; i < b.length; i++) 605 { 606 sb.append(hexChar.charAt((b[i] >> 4) & 0x0f)); 607 sb.append(hexChar.charAt(b[i] & 0x0f)); 608 } 609 return sb.toString(); 610 } 611 612 public static void main(String[] args) 613 { 614 SHA1 sha = new SHA1(); 615 616 byte[] dig1 = new byte[20]; 617 byte[] dig2 = new byte[20]; 618 byte[] dig3 = new byte[20]; 619 620 /* 621 * We do not specify a charset name for getBytes(), since we assume that 622 * the JVM's default encoder maps the _used_ ASCII characters exactly as 623 * getBytes("US-ASCII") would do. (Ah, yes, too lazy to catch the 624 * exception that can be thrown by getBytes("US-ASCII")). Note: This has 625 * no effect on the SHA-1 implementation, this is just for the following 626 * test code. 627 */ 628 629 sha.update("abc".getBytes()); 630 sha.digest(dig1); 631 632 sha.update("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq".getBytes()); 633 sha.digest(dig2); 634 635 for (int i = 0; i < 1000000; i++) 636 sha.update((byte) 'a'); 637 sha.digest(dig3); 638 639 String dig1_res = toHexString(dig1); 640 String dig2_res = toHexString(dig2); 641 String dig3_res = toHexString(dig3); 642 643 String dig1_ref = "A9993E364706816ABA3E25717850C26C9CD0D89D"; 644 String dig2_ref = "84983E441C3BD26EBAAE4AA1F95129E5E54670F1"; 645 String dig3_ref = "34AA973CD4C4DAA4F61EEB2BDBAD27316534016F"; 646 647 if (dig1_res.equals(dig1_ref)) 648 System.out.println("SHA-1 Test 1 OK."); 649 else 650 System.out.println("SHA-1 Test 1 FAILED."); 651 652 if (dig2_res.equals(dig2_ref)) 653 System.out.println("SHA-1 Test 2 OK."); 654 else 655 System.out.println("SHA-1 Test 2 FAILED."); 656 657 if (dig3_res.equals(dig3_ref)) 658 System.out.println("SHA-1 Test 3 OK."); 659 else 660 System.out.println("SHA-1 Test 3 FAILED."); 661 662 if (dig3_res.equals(dig3_ref)) 663 System.out.println("SHA-1 Test 3 OK."); 664 else 665 System.out.println("SHA-1 Test 3 FAILED."); 666 } 667 } 668
