Return to sha2_hasher.c CVS log | Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / strongswan / src / libstrongswan / plugins / sha2 |
1.1 misho 1: /* 2: * Copyright (C) 2006 Martin Willi 3: * HSR Hochschule fuer Technik Rapperswil 4: * Copyright (C) 2001 Jari Ruusu. 5: * 6: * Ported from strongSwans implementation written by Jari Ruusu. 7: * 8: * This program is free software; you can redistribute it and/or modify it 9: * under the terms of the GNU General Public License as published by the 10: * Free Software Foundation; either version 2 of the License, or (at your 11: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. 12: * 13: * This program is distributed in the hope that it will be useful, but 14: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16: * for more details. 17: */ 18: 19: #include <string.h> 20: 21: #include "sha2_hasher.h" 22: 23: 24: typedef struct private_sha512_hasher_t private_sha512_hasher_t; 25: 26: /** 27: * Private data structure with hashing context for SHA384 and SHA512 28: */ 29: struct private_sha512_hasher_t { 30: /** 31: * Public interface for this hasher. 32: */ 33: sha2_hasher_t public; 34: 35: unsigned char sha_out[128]; /* results are here, bytes 0..47/0..63 */ 36: uint64_t sha_H[8]; 37: uint64_t sha_blocks; 38: uint64_t sha_blocksMSB; 39: int sha_bufCnt; 40: }; 41: 42: 43: typedef struct private_sha256_hasher_t private_sha256_hasher_t; 44: 45: /** 46: * Private data structure with hashing context for SHA256 47: */ 48: struct private_sha256_hasher_t { 49: /** 50: * Public interface for this hasher. 51: */ 52: sha2_hasher_t public; 53: 54: unsigned char sha_out[64]; /* results are here, bytes 0...31 */ 55: uint32_t sha_H[8]; 56: uint64_t sha_blocks; 57: int sha_bufCnt; 58: }; 59: 60: 61: static const uint32_t sha224_hashInit[8] = { 62: 0xc1059ed8, 0x367cd507, 0x3070dd17, 0xf70e5939, 0xffc00b31, 0x68581511, 63: 0x64f98fa7, 0xbefa4fa4 64: }; 65: 66: static const uint32_t sha256_hashInit[8] = { 67: 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 68: 0x1f83d9ab, 0x5be0cd19 69: }; 70: 71: static const uint32_t sha256_K[64] = { 72: 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 73: 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 74: 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786, 75: 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, 76: 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 77: 0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 78: 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b, 79: 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, 80: 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 81: 0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 82: 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 83: }; 84: 85: static const uint64_t sha512_hashInit[8] = { 86: 0x6a09e667f3bcc908ULL, 0xbb67ae8584caa73bULL, 0x3c6ef372fe94f82bULL, 87: 0xa54ff53a5f1d36f1ULL, 0x510e527fade682d1ULL, 0x9b05688c2b3e6c1fULL, 88: 0x1f83d9abfb41bd6bULL, 0x5be0cd19137e2179ULL 89: }; 90: 91: static const uint64_t sha384_hashInit[8] = { 92: 0xcbbb9d5dc1059ed8ULL, 0x629a292a367cd507ULL, 0x9159015a3070dd17ULL, 93: 0x152fecd8f70e5939ULL, 0x67332667ffc00b31ULL, 0x8eb44a8768581511ULL, 94: 0xdb0c2e0d64f98fa7ULL, 0x47b5481dbefa4fa4ULL 95: }; 96: 97: static const uint64_t sha512_K[80] = { 98: 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, 99: 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 100: 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL, 101: 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, 102: 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, 103: 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 104: 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL, 105: 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, 106: 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, 107: 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 108: 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL, 109: 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, 110: 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, 111: 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 112: 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL, 113: 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, 114: 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, 115: 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 116: 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL, 117: 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, 118: 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, 119: 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 120: 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL, 121: 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, 122: 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, 123: 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 124: 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL 125: }; 126: 127: 128: /* set macros for SHA256 */ 129: #define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z))) 130: #define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z))) 131: #define R(x,y) ((y) >> (x)) 132: 133: #define S(x,y) (((y) >> (x)) | ((y) << (32 - (x)))) 134: #define uSig0(x) ((S(2,(x))) ^ (S(13,(x))) ^ (S(22,(x)))) 135: #define uSig1(x) ((S(6,(x))) ^ (S(11,(x))) ^ (S(25,(x)))) 136: #define lSig0(x) ((S(7,(x))) ^ (S(18,(x))) ^ (R(3,(x)))) 137: #define lSig1(x) ((S(17,(x))) ^ (S(19,(x))) ^ (R(10,(x)))) 138: 139: /** 140: * Single block SHA256 transformation 141: */ 142: static void sha256_transform(private_sha256_hasher_t *ctx, 143: const unsigned char *datap) 144: { 145: register int j; 146: uint32_t a, b, c, d, e, f, g, h; 147: uint32_t T1, T2, W[64], Wm2, Wm15; 148: 149: /* read the data, big endian byte order */ 150: j = 0; 151: do { 152: W[j] = (((uint32_t)(datap[0]))<<24) | (((uint32_t)(datap[1]))<<16) | 153: (((uint32_t)(datap[2]))<<8 ) | ((uint32_t)(datap[3])); 154: datap += 4; 155: } while(++j < 16); 156: 157: /* initialize variables a...h */ 158: a = ctx->sha_H[0]; 159: b = ctx->sha_H[1]; 160: c = ctx->sha_H[2]; 161: d = ctx->sha_H[3]; 162: e = ctx->sha_H[4]; 163: f = ctx->sha_H[5]; 164: g = ctx->sha_H[6]; 165: h = ctx->sha_H[7]; 166: 167: /* apply compression function */ 168: j = 0; 169: do 170: { 171: if(j >= 16) 172: { 173: Wm2 = W[j - 2]; 174: Wm15 = W[j - 15]; 175: W[j] = lSig1(Wm2) + W[j - 7] + lSig0(Wm15) + W[j - 16]; 176: } 177: T1 = h + uSig1(e) + Ch(e,f,g) + sha256_K[j] + W[j]; 178: T2 = uSig0(a) + Maj(a,b,c); 179: h = g; g = f; f = e; 180: e = d + T1; 181: d = c; c = b; b = a; 182: a = T1 + T2; 183: } while(++j < 64); 184: 185: /* compute intermediate hash value */ 186: ctx->sha_H[0] += a; 187: ctx->sha_H[1] += b; 188: ctx->sha_H[2] += c; 189: ctx->sha_H[3] += d; 190: ctx->sha_H[4] += e; 191: ctx->sha_H[5] += f; 192: ctx->sha_H[6] += g; 193: ctx->sha_H[7] += h; 194: 195: ctx->sha_blocks++; 196: } 197: 198: /** 199: * Update SHA256 hash 200: */ 201: static void sha256_write(private_sha256_hasher_t *ctx, 202: const unsigned char *datap, int length) 203: { 204: while(length > 0) 205: { 206: if(!ctx->sha_bufCnt) 207: { 208: while(length >= sizeof(ctx->sha_out)) 209: { 210: sha256_transform(ctx, datap); 211: datap += sizeof(ctx->sha_out); 212: length -= sizeof(ctx->sha_out); 213: } 214: if(!length) return; 215: } 216: ctx->sha_out[ctx->sha_bufCnt] = *datap++; 217: length--; 218: if(++ctx->sha_bufCnt == sizeof(ctx->sha_out)) 219: { 220: sha256_transform(ctx, &ctx->sha_out[0]); 221: ctx->sha_bufCnt = 0; 222: } 223: } 224: } 225: 226: /** 227: * finalize SHA256 hash 228: */ 229: static void sha256_final(private_sha256_hasher_t *ctx, u_char *buf, size_t len) 230: { 231: register int j; 232: uint64_t bitLength; 233: uint32_t i; 234: unsigned char padByte, *datap; 235: 236: bitLength = (ctx->sha_blocks << 9) | (ctx->sha_bufCnt << 3); 237: padByte = 0x80; 238: sha256_write(ctx, &padByte, 1); 239: 240: /* pad extra space with zeroes */ 241: padByte = 0; 242: while(ctx->sha_bufCnt != 56) 243: { 244: sha256_write(ctx, &padByte, 1); 245: } 246: 247: /* write bit length, big endian byte order */ 248: ctx->sha_out[56] = bitLength >> 56; 249: ctx->sha_out[57] = bitLength >> 48; 250: ctx->sha_out[58] = bitLength >> 40; 251: ctx->sha_out[59] = bitLength >> 32; 252: ctx->sha_out[60] = bitLength >> 24; 253: ctx->sha_out[61] = bitLength >> 16; 254: ctx->sha_out[62] = bitLength >> 8; 255: ctx->sha_out[63] = bitLength; 256: sha256_transform(ctx, &ctx->sha_out[0]); 257: 258: datap = buf; 259: j = 0; 260: do { 261: i = ctx->sha_H[j]; 262: datap[0] = i >> 24; 263: datap[1] = i >> 16; 264: datap[2] = i >> 8; 265: datap[3] = i; 266: datap += 4; 267: } while(++j < len / 4); 268: } 269: 270: /* update macros for SHA512 */ 271: #undef S 272: #undef uSig0 273: #undef uSig1 274: #undef lSig0 275: #undef lSig1 276: #define S(x,y) (((y) >> (x)) | ((y) << (64 - (x)))) 277: #define uSig0(x) ((S(28,(x))) ^ (S(34,(x))) ^ (S(39,(x)))) 278: #define uSig1(x) ((S(14,(x))) ^ (S(18,(x))) ^ (S(41,(x)))) 279: #define lSig0(x) ((S(1,(x))) ^ (S(8,(x))) ^ (R(7,(x)))) 280: #define lSig1(x) ((S(19,(x))) ^ (S(61,(x))) ^ (R(6,(x)))) 281: 282: /** 283: * Single block SHA384/SHA512 transformation 284: */ 285: static void sha512_transform(private_sha512_hasher_t *ctx, 286: const unsigned char *datap) 287: { 288: register int j; 289: uint64_t a, b, c, d, e, f, g, h; 290: uint64_t T1, T2, W[80], Wm2, Wm15; 291: 292: /* read the data, big endian byte order */ 293: j = 0; 294: do { 295: W[j] = (((uint64_t)(datap[0]))<<56) | (((uint64_t)(datap[1]))<<48) | 296: (((uint64_t)(datap[2]))<<40) | (((uint64_t)(datap[3]))<<32) | 297: (((uint64_t)(datap[4]))<<24) | (((uint64_t)(datap[5]))<<16) | 298: (((uint64_t)(datap[6]))<<8 ) | ((uint64_t)(datap[7])); 299: datap += 8; 300: } while(++j < 16); 301: 302: /* initialize variables a...h */ 303: a = ctx->sha_H[0]; 304: b = ctx->sha_H[1]; 305: c = ctx->sha_H[2]; 306: d = ctx->sha_H[3]; 307: e = ctx->sha_H[4]; 308: f = ctx->sha_H[5]; 309: g = ctx->sha_H[6]; 310: h = ctx->sha_H[7]; 311: 312: /* apply compression function */ 313: j = 0; 314: do { 315: if(j >= 16) { 316: Wm2 = W[j - 2]; 317: Wm15 = W[j - 15]; 318: W[j] = lSig1(Wm2) + W[j - 7] + lSig0(Wm15) + W[j - 16]; 319: } 320: T1 = h + uSig1(e) + Ch(e,f,g) + sha512_K[j] + W[j]; 321: T2 = uSig0(a) + Maj(a,b,c); 322: h = g; g = f; f = e; 323: e = d + T1; 324: d = c; c = b; b = a; 325: a = T1 + T2; 326: } while(++j < 80); 327: 328: /* compute intermediate hash value */ 329: ctx->sha_H[0] += a; 330: ctx->sha_H[1] += b; 331: ctx->sha_H[2] += c; 332: ctx->sha_H[3] += d; 333: ctx->sha_H[4] += e; 334: ctx->sha_H[5] += f; 335: ctx->sha_H[6] += g; 336: ctx->sha_H[7] += h; 337: 338: ctx->sha_blocks++; 339: if(!ctx->sha_blocks) ctx->sha_blocksMSB++; 340: } 341: 342: /** 343: * Update a SHA384/SHA512 hash 344: */ 345: static void sha512_write(private_sha512_hasher_t *ctx, 346: const unsigned char *datap, int length) 347: { 348: while(length > 0) 349: { 350: if(!ctx->sha_bufCnt) 351: { 352: while(length >= sizeof(ctx->sha_out)) 353: { 354: sha512_transform(ctx, datap); 355: datap += sizeof(ctx->sha_out); 356: length -= sizeof(ctx->sha_out); 357: } 358: if(!length) return; 359: } 360: ctx->sha_out[ctx->sha_bufCnt] = *datap++; 361: length--; 362: if(++ctx->sha_bufCnt == sizeof(ctx->sha_out)) 363: { 364: sha512_transform(ctx, &ctx->sha_out[0]); 365: ctx->sha_bufCnt = 0; 366: } 367: } 368: } 369: 370: /** 371: * Finalize a SHA384/SHA512 hash 372: */ 373: static void sha512_final(private_sha512_hasher_t *ctx, u_char *buf, size_t len) 374: { 375: register int j; 376: uint64_t bitLength, bitLengthMSB; 377: uint64_t i; 378: unsigned char padByte, *datap; 379: 380: bitLength = (ctx->sha_blocks << 10) | (ctx->sha_bufCnt << 3); 381: bitLengthMSB = (ctx->sha_blocksMSB << 10) | (ctx->sha_blocks >> 54); 382: padByte = 0x80; 383: sha512_write(ctx, &padByte, 1); 384: 385: /* pad extra space with zeroes */ 386: padByte = 0; 387: while(ctx->sha_bufCnt != 112) 388: { 389: sha512_write(ctx, &padByte, 1); 390: } 391: 392: /* write bit length, big endian byte order */ 393: ctx->sha_out[112] = bitLengthMSB >> 56; 394: ctx->sha_out[113] = bitLengthMSB >> 48; 395: ctx->sha_out[114] = bitLengthMSB >> 40; 396: ctx->sha_out[115] = bitLengthMSB >> 32; 397: ctx->sha_out[116] = bitLengthMSB >> 24; 398: ctx->sha_out[117] = bitLengthMSB >> 16; 399: ctx->sha_out[118] = bitLengthMSB >> 8; 400: ctx->sha_out[119] = bitLengthMSB; 401: ctx->sha_out[120] = bitLength >> 56; 402: ctx->sha_out[121] = bitLength >> 48; 403: ctx->sha_out[122] = bitLength >> 40; 404: ctx->sha_out[123] = bitLength >> 32; 405: ctx->sha_out[124] = bitLength >> 24; 406: ctx->sha_out[125] = bitLength >> 16; 407: ctx->sha_out[126] = bitLength >> 8; 408: ctx->sha_out[127] = bitLength; 409: sha512_transform(ctx, &ctx->sha_out[0]); 410: 411: datap = buf; 412: j = 0; 413: do { 414: i = ctx->sha_H[j]; 415: datap[0] = i >> 56; 416: datap[1] = i >> 48; 417: datap[2] = i >> 40; 418: datap[3] = i >> 32; 419: datap[4] = i >> 24; 420: datap[5] = i >> 16; 421: datap[6] = i >> 8; 422: datap[7] = i; 423: datap += 8; 424: } while(++j < len / 8); 425: } 426: 427: METHOD(hasher_t, reset224, bool, 428: private_sha256_hasher_t *this) 429: { 430: memcpy(&this->sha_H[0], &sha224_hashInit[0], sizeof(this->sha_H)); 431: this->sha_blocks = 0; 432: this->sha_bufCnt = 0; 433: return TRUE; 434: } 435: 436: METHOD(hasher_t, reset256, bool, 437: private_sha256_hasher_t *this) 438: { 439: memcpy(&this->sha_H[0], &sha256_hashInit[0], sizeof(this->sha_H)); 440: this->sha_blocks = 0; 441: this->sha_bufCnt = 0; 442: return TRUE; 443: } 444: 445: METHOD(hasher_t, reset384, bool, 446: private_sha512_hasher_t *this) 447: { 448: memcpy(&this->sha_H[0], &sha384_hashInit[0], sizeof(this->sha_H)); 449: this->sha_blocks = 0; 450: this->sha_blocksMSB = 0; 451: this->sha_bufCnt = 0; 452: return TRUE; 453: } 454: 455: METHOD(hasher_t, reset512, bool, 456: private_sha512_hasher_t *this) 457: { 458: memcpy(&this->sha_H[0], &sha512_hashInit[0], sizeof(this->sha_H)); 459: this->sha_blocks = 0; 460: this->sha_blocksMSB = 0; 461: this->sha_bufCnt = 0; 462: return TRUE; 463: } 464: 465: METHOD(hasher_t, get_hash224, bool, 466: private_sha256_hasher_t *this, chunk_t chunk, uint8_t *buffer) 467: { 468: sha256_write(this, chunk.ptr, chunk.len); 469: if (buffer != NULL) 470: { 471: sha256_final(this, buffer, HASH_SIZE_SHA224); 472: reset224(this); 473: } 474: return TRUE; 475: } 476: 477: METHOD(hasher_t, get_hash256, bool, 478: private_sha256_hasher_t *this, chunk_t chunk, uint8_t *buffer) 479: { 480: sha256_write(this, chunk.ptr, chunk.len); 481: if (buffer != NULL) 482: { 483: sha256_final(this, buffer, HASH_SIZE_SHA256); 484: reset256(this); 485: } 486: return TRUE; 487: } 488: 489: METHOD(hasher_t, get_hash384, bool, 490: private_sha512_hasher_t *this, chunk_t chunk, uint8_t *buffer) 491: { 492: sha512_write(this, chunk.ptr, chunk.len); 493: if (buffer != NULL) 494: { 495: sha512_final(this, buffer, HASH_SIZE_SHA384); 496: reset384(this); 497: } 498: return TRUE; 499: } 500: 501: METHOD(hasher_t, get_hash512, bool, 502: private_sha512_hasher_t *this, chunk_t chunk, uint8_t *buffer) 503: { 504: sha512_write(this, chunk.ptr, chunk.len); 505: if (buffer != NULL) 506: { 507: sha512_final(this, buffer, HASH_SIZE_SHA512); 508: reset512(this); 509: } 510: return TRUE; 511: } 512: 513: METHOD(hasher_t, allocate_hash224, bool, 514: private_sha256_hasher_t *this, chunk_t chunk, chunk_t *hash) 515: { 516: chunk_t allocated_hash = chunk_empty; 517: 518: if (hash) 519: { 520: *hash = allocated_hash = chunk_alloc(HASH_SIZE_SHA224); 521: } 522: return get_hash224(this, chunk, allocated_hash.ptr); 523: } 524: 525: METHOD(hasher_t, allocate_hash256, bool, 526: private_sha256_hasher_t *this, chunk_t chunk, chunk_t *hash) 527: { 528: chunk_t allocated_hash = chunk_empty; 529: 530: if (hash) 531: { 532: *hash = allocated_hash = chunk_alloc(HASH_SIZE_SHA256); 533: } 534: return get_hash256(this, chunk, allocated_hash.ptr); 535: } 536: 537: METHOD(hasher_t, allocate_hash384, bool, 538: private_sha512_hasher_t *this, chunk_t chunk, chunk_t *hash) 539: { 540: chunk_t allocated_hash = chunk_empty; 541: 542: if (hash) 543: { 544: *hash = allocated_hash = chunk_alloc(HASH_SIZE_SHA384); 545: } 546: return get_hash384(this, chunk, allocated_hash.ptr); 547: } 548: 549: METHOD(hasher_t, allocate_hash512, bool, 550: private_sha512_hasher_t *this, chunk_t chunk, chunk_t *hash) 551: { 552: chunk_t allocated_hash = chunk_empty; 553: 554: if (hash) 555: { 556: *hash = allocated_hash = chunk_alloc(HASH_SIZE_SHA512); 557: } 558: return get_hash512(this, chunk, allocated_hash.ptr); 559: } 560: 561: METHOD(hasher_t, get_hash_size224, size_t, 562: private_sha256_hasher_t *this) 563: { 564: return HASH_SIZE_SHA224; 565: } 566: 567: METHOD(hasher_t, get_hash_size256, size_t, 568: private_sha256_hasher_t *this) 569: { 570: return HASH_SIZE_SHA256; 571: } 572: 573: METHOD(hasher_t, get_hash_size384, size_t, 574: private_sha512_hasher_t *this) 575: { 576: return HASH_SIZE_SHA384; 577: } 578: 579: METHOD(hasher_t, get_hash_size512, size_t, 580: private_sha512_hasher_t *this) 581: { 582: return HASH_SIZE_SHA512; 583: } 584: 585: METHOD(hasher_t, destroy, void, 586: sha2_hasher_t *this) 587: { 588: free(this); 589: } 590: 591: /* 592: * Described in header. 593: */ 594: sha2_hasher_t *sha2_hasher_create(hash_algorithm_t algorithm) 595: { 596: switch (algorithm) 597: { 598: case HASH_SHA224: 599: { 600: private_sha256_hasher_t *this; 601: 602: INIT(this, 603: .public = { 604: .hasher_interface = { 605: .reset = _reset224, 606: .get_hash_size = _get_hash_size224, 607: .get_hash = _get_hash224, 608: .allocate_hash = _allocate_hash224, 609: .destroy = _destroy, 610: }, 611: }, 612: ); 613: reset224(this); 614: return &this->public; 615: } 616: case HASH_SHA256: 617: { 618: private_sha256_hasher_t *this; 619: 620: INIT(this, 621: .public = { 622: .hasher_interface = { 623: .reset = _reset256, 624: .get_hash_size = _get_hash_size256, 625: .get_hash = _get_hash256, 626: .allocate_hash = _allocate_hash256, 627: .destroy = _destroy, 628: }, 629: }, 630: ); 631: reset256(this); 632: return &this->public; 633: } 634: case HASH_SHA384: 635: { 636: private_sha512_hasher_t *this; 637: 638: INIT(this, 639: .public = { 640: .hasher_interface = { 641: .reset = _reset384, 642: .get_hash_size = _get_hash_size384, 643: .get_hash = _get_hash384, 644: .allocate_hash = _allocate_hash384, 645: .destroy = _destroy, 646: }, 647: }, 648: ); 649: reset384(this); 650: return &this->public; 651: } 652: case HASH_SHA512: 653: { 654: private_sha512_hasher_t *this; 655: 656: INIT(this, 657: .public = { 658: .hasher_interface = { 659: .reset = _reset512, 660: .get_hash_size = _get_hash_size512, 661: .get_hash = _get_hash512, 662: .allocate_hash = _allocate_hash512, 663: .destroy = _destroy, 664: }, 665: }, 666: ); 667: reset512(this); 668: return &this->public; 669: } 670: default: 671: return NULL; 672: } 673: }