/* * SHA-{224,256} * (C) 1999-2010 Jack Lloyd * 2007 FlexSecure GmbH * * Distributed under the terms of the Botan license */ #include #include #include namespace Botan { namespace { /* * SHA-256 Rho Function */ inline u32bit rho(u32bit X, u32bit rot1, u32bit rot2, u32bit rot3) { return (rotate_right(X, rot1) ^ rotate_right(X, rot2) ^ rotate_right(X, rot3)); } /* * SHA-256 Sigma Function */ inline u32bit sigma(u32bit X, u32bit rot1, u32bit rot2, u32bit shift) { return (rotate_right(X, rot1) ^ rotate_right(X, rot2) ^ (X >> shift)); } /* * SHA-256 F1 Function */ inline void F1(u32bit A, u32bit B, u32bit C, u32bit& D, u32bit E, u32bit F, u32bit G, u32bit& H, u32bit msg, u32bit magic) { H += magic + rho(E, 6, 11, 25) + ((E & F) ^ (~E & G)) + msg; D += H; H += rho(A, 2, 13, 22) + ((A & B) | ((A | B) & C)); } /* * SHA-224 / SHA-256 compression function */ void sha2_32_compress(MemoryRegion& W, MemoryRegion& digest, const byte input[], size_t blocks) { u32bit A = digest[0], B = digest[1], C = digest[2], D = digest[3], E = digest[4], F = digest[5], G = digest[6], H = digest[7]; for(size_t i = 0; i != blocks; ++i) { load_be(&W[0], input, 16); for(size_t j = 16; j != 64; j += 8) { W[j ] = sigma(W[j- 2], 17, 19, 10) + W[j-7] + sigma(W[j-15], 7, 18, 3) + W[j-16]; W[j+1] = sigma(W[j- 1], 17, 19, 10) + W[j-6] + sigma(W[j-14], 7, 18, 3) + W[j-15]; W[j+2] = sigma(W[j ], 17, 19, 10) + W[j-5] + sigma(W[j-13], 7, 18, 3) + W[j-14]; W[j+3] = sigma(W[j+ 1], 17, 19, 10) + W[j-4] + sigma(W[j-12], 7, 18, 3) + W[j-13]; W[j+4] = sigma(W[j+ 2], 17, 19, 10) + W[j-3] + sigma(W[j-11], 7, 18, 3) + W[j-12]; W[j+5] = sigma(W[j+ 3], 17, 19, 10) + W[j-2] + sigma(W[j-10], 7, 18, 3) + W[j-11]; W[j+6] = sigma(W[j+ 4], 17, 19, 10) + W[j-1] + sigma(W[j- 9], 7, 18, 3) + W[j-10]; W[j+7] = sigma(W[j+ 5], 17, 19, 10) + W[j ] + sigma(W[j- 8], 7, 18, 3) + W[j- 9]; } F1(A, B, C, D, E, F, G, H, W[ 0], 0x428A2F98); F1(H, A, B, C, D, E, F, G, W[ 1], 0x71374491); F1(G, H, A, B, C, D, E, F, W[ 2], 0xB5C0FBCF); F1(F, G, H, A, B, C, D, E, W[ 3], 0xE9B5DBA5); F1(E, F, G, H, A, B, C, D, W[ 4], 0x3956C25B); F1(D, E, F, G, H, A, B, C, W[ 5], 0x59F111F1); F1(C, D, E, F, G, H, A, B, W[ 6], 0x923F82A4); F1(B, C, D, E, F, G, H, A, W[ 7], 0xAB1C5ED5); F1(A, B, C, D, E, F, G, H, W[ 8], 0xD807AA98); F1(H, A, B, C, D, E, F, G, W[ 9], 0x12835B01); F1(G, H, A, B, C, D, E, F, W[10], 0x243185BE); F1(F, G, H, A, B, C, D, E, W[11], 0x550C7DC3); F1(E, F, G, H, A, B, C, D, W[12], 0x72BE5D74); F1(D, E, F, G, H, A, B, C, W[13], 0x80DEB1FE); F1(C, D, E, F, G, H, A, B, W[14], 0x9BDC06A7); F1(B, C, D, E, F, G, H, A, W[15], 0xC19BF174); F1(A, B, C, D, E, F, G, H, W[16], 0xE49B69C1); F1(H, A, B, C, D, E, F, G, W[17], 0xEFBE4786); F1(G, H, A, B, C, D, E, F, W[18], 0x0FC19DC6); F1(F, G, H, A, B, C, D, E, W[19], 0x240CA1CC); F1(E, F, G, H, A, B, C, D, W[20], 0x2DE92C6F); F1(D, E, F, G, H, A, B, C, W[21], 0x4A7484AA); F1(C, D, E, F, G, H, A, B, W[22], 0x5CB0A9DC); F1(B, C, D, E, F, G, H, A, W[23], 0x76F988DA); F1(A, B, C, D, E, F, G, H, W[24], 0x983E5152); F1(H, A, B, C, D, E, F, G, W[25], 0xA831C66D); F1(G, H, A, B, C, D, E, F, W[26], 0xB00327C8); F1(F, G, H, A, B, C, D, E, W[27], 0xBF597FC7); F1(E, F, G, H, A, B, C, D, W[28], 0xC6E00BF3); F1(D, E, F, G, H, A, B, C, W[29], 0xD5A79147); F1(C, D, E, F, G, H, A, B, W[30], 0x06CA6351); F1(B, C, D, E, F, G, H, A, W[31], 0x14292967); F1(A, B, C, D, E, F, G, H, W[32], 0x27B70A85); F1(H, A, B, C, D, E, F, G, W[33], 0x2E1B2138); F1(G, H, A, B, C, D, E, F, W[34], 0x4D2C6DFC); F1(F, G, H, A, B, C, D, E, W[35], 0x53380D13); F1(E, F, G, H, A, B, C, D, W[36], 0x650A7354); F1(D, E, F, G, H, A, B, C, W[37], 0x766A0ABB); F1(C, D, E, F, G, H, A, B, W[38], 0x81C2C92E); F1(B, C, D, E, F, G, H, A, W[39], 0x92722C85); F1(A, B, C, D, E, F, G, H, W[40], 0xA2BFE8A1); F1(H, A, B, C, D, E, F, G, W[41], 0xA81A664B); F1(G, H, A, B, C, D, E, F, W[42], 0xC24B8B70); F1(F, G, H, A, B, C, D, E, W[43], 0xC76C51A3); F1(E, F, G, H, A, B, C, D, W[44], 0xD192E819); F1(D, E, F, G, H, A, B, C, W[45], 0xD6990624); F1(C, D, E, F, G, H, A, B, W[46], 0xF40E3585); F1(B, C, D, E, F, G, H, A, W[47], 0x106AA070); F1(A, B, C, D, E, F, G, H, W[48], 0x19A4C116); F1(H, A, B, C, D, E, F, G, W[49], 0x1E376C08); F1(G, H, A, B, C, D, E, F, W[50], 0x2748774C); F1(F, G, H, A, B, C, D, E, W[51], 0x34B0BCB5); F1(E, F, G, H, A, B, C, D, W[52], 0x391C0CB3); F1(D, E, F, G, H, A, B, C, W[53], 0x4ED8AA4A); F1(C, D, E, F, G, H, A, B, W[54], 0x5B9CCA4F); F1(B, C, D, E, F, G, H, A, W[55], 0x682E6FF3); F1(A, B, C, D, E, F, G, H, W[56], 0x748F82EE); F1(H, A, B, C, D, E, F, G, W[57], 0x78A5636F); F1(G, H, A, B, C, D, E, F, W[58], 0x84C87814); F1(F, G, H, A, B, C, D, E, W[59], 0x8CC70208); F1(E, F, G, H, A, B, C, D, W[60], 0x90BEFFFA); F1(D, E, F, G, H, A, B, C, W[61], 0xA4506CEB); F1(C, D, E, F, G, H, A, B, W[62], 0xBEF9A3F7); F1(B, C, D, E, F, G, H, A, W[63], 0xC67178F2); A = (digest[0] += A); B = (digest[1] += B); C = (digest[2] += C); D = (digest[3] += D); E = (digest[4] += E); F = (digest[5] += F); G = (digest[6] += G); H = (digest[7] += H); input += 64; } } } /* * SHA-224 compression function */ void SHA_224::compress_n(const byte input[], size_t blocks) { sha2_32_compress(W, digest, input, blocks); } /* * Copy out the digest */ void SHA_224::copy_out(byte output[]) { for(size_t i = 0; i != output_length(); i += 4) store_be(digest[i/4], output + i); } /* * Clear memory of sensitive data */ void SHA_224::clear() { MDx_HashFunction::clear(); zeroise(W); digest[0] = 0xC1059ED8; digest[1] = 0x367CD507; digest[2] = 0x3070DD17; digest[3] = 0xF70E5939; digest[4] = 0xFFC00B31; digest[5] = 0x68581511; digest[6] = 0x64F98FA7; digest[7] = 0xBEFA4FA4; } /* * SHA-256 compression function */ void SHA_256::compress_n(const byte input[], size_t blocks) { sha2_32_compress(W, digest, input, blocks); } /* * Copy out the digest */ void SHA_256::copy_out(byte output[]) { for(size_t i = 0; i != output_length(); i += 4) store_be(digest[i/4], output + i); } /* * Clear memory of sensitive data */ void SHA_256::clear() { MDx_HashFunction::clear(); zeroise(W); digest[0] = 0x6A09E667; digest[1] = 0xBB67AE85; digest[2] = 0x3C6EF372; digest[3] = 0xA54FF53A; digest[4] = 0x510E527F; digest[5] = 0x9B05688C; digest[6] = 0x1F83D9AB; digest[7] = 0x5BE0CD19; } }