Source file src/pkg/crypto/sha512/sha512block.go
1 // Copyright 2009 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 // SHA512 block step. 6 // In its own file so that a faster assembly or C version 7 // can be substituted easily. 8 9 package sha512 10 11 var _K = []uint64{ 12 0x428a2f98d728ae22, 13 0x7137449123ef65cd, 14 0xb5c0fbcfec4d3b2f, 15 0xe9b5dba58189dbbc, 16 0x3956c25bf348b538, 17 0x59f111f1b605d019, 18 0x923f82a4af194f9b, 19 0xab1c5ed5da6d8118, 20 0xd807aa98a3030242, 21 0x12835b0145706fbe, 22 0x243185be4ee4b28c, 23 0x550c7dc3d5ffb4e2, 24 0x72be5d74f27b896f, 25 0x80deb1fe3b1696b1, 26 0x9bdc06a725c71235, 27 0xc19bf174cf692694, 28 0xe49b69c19ef14ad2, 29 0xefbe4786384f25e3, 30 0x0fc19dc68b8cd5b5, 31 0x240ca1cc77ac9c65, 32 0x2de92c6f592b0275, 33 0x4a7484aa6ea6e483, 34 0x5cb0a9dcbd41fbd4, 35 0x76f988da831153b5, 36 0x983e5152ee66dfab, 37 0xa831c66d2db43210, 38 0xb00327c898fb213f, 39 0xbf597fc7beef0ee4, 40 0xc6e00bf33da88fc2, 41 0xd5a79147930aa725, 42 0x06ca6351e003826f, 43 0x142929670a0e6e70, 44 0x27b70a8546d22ffc, 45 0x2e1b21385c26c926, 46 0x4d2c6dfc5ac42aed, 47 0x53380d139d95b3df, 48 0x650a73548baf63de, 49 0x766a0abb3c77b2a8, 50 0x81c2c92e47edaee6, 51 0x92722c851482353b, 52 0xa2bfe8a14cf10364, 53 0xa81a664bbc423001, 54 0xc24b8b70d0f89791, 55 0xc76c51a30654be30, 56 0xd192e819d6ef5218, 57 0xd69906245565a910, 58 0xf40e35855771202a, 59 0x106aa07032bbd1b8, 60 0x19a4c116b8d2d0c8, 61 0x1e376c085141ab53, 62 0x2748774cdf8eeb99, 63 0x34b0bcb5e19b48a8, 64 0x391c0cb3c5c95a63, 65 0x4ed8aa4ae3418acb, 66 0x5b9cca4f7763e373, 67 0x682e6ff3d6b2b8a3, 68 0x748f82ee5defb2fc, 69 0x78a5636f43172f60, 70 0x84c87814a1f0ab72, 71 0x8cc702081a6439ec, 72 0x90befffa23631e28, 73 0xa4506cebde82bde9, 74 0xbef9a3f7b2c67915, 75 0xc67178f2e372532b, 76 0xca273eceea26619c, 77 0xd186b8c721c0c207, 78 0xeada7dd6cde0eb1e, 79 0xf57d4f7fee6ed178, 80 0x06f067aa72176fba, 81 0x0a637dc5a2c898a6, 82 0x113f9804bef90dae, 83 0x1b710b35131c471b, 84 0x28db77f523047d84, 85 0x32caab7b40c72493, 86 0x3c9ebe0a15c9bebc, 87 0x431d67c49c100d4c, 88 0x4cc5d4becb3e42b6, 89 0x597f299cfc657e2a, 90 0x5fcb6fab3ad6faec, 91 0x6c44198c4a475817, 92 } 93 94 func _Block(dig *digest, p []byte) int { 95 var w [80]uint64 96 n := 0 97 h0, h1, h2, h3, h4, h5, h6, h7 := dig.h[0], dig.h[1], dig.h[2], dig.h[3], dig.h[4], dig.h[5], dig.h[6], dig.h[7] 98 for len(p) >= _Chunk { 99 for i := 0; i < 16; i++ { 100 j := i * 8 101 w[i] = uint64(p[j])<<56 | uint64(p[j+1])<<48 | uint64(p[j+2])<<40 | uint64(p[j+3])<<32 | 102 uint64(p[j+4])<<24 | uint64(p[j+5])<<16 | uint64(p[j+6])<<8 | uint64(p[j+7]) 103 } 104 for i := 16; i < 80; i++ { 105 t1 := (w[i-2]>>19 | w[i-2]<<(64-19)) ^ (w[i-2]>>61 | w[i-2]<<(64-61)) ^ (w[i-2] >> 6) 106 107 t2 := (w[i-15]>>1 | w[i-15]<<(64-1)) ^ (w[i-15]>>8 | w[i-15]<<(64-8)) ^ (w[i-15] >> 7) 108 109 w[i] = t1 + w[i-7] + t2 + w[i-16] 110 } 111 112 a, b, c, d, e, f, g, h := h0, h1, h2, h3, h4, h5, h6, h7 113 114 for i := 0; i < 80; i++ { 115 t1 := h + ((e>>14 | e<<(64-14)) ^ (e>>18 | e<<(64-18)) ^ (e>>41 | e<<(64-41))) + ((e & f) ^ (^e & g)) + _K[i] + w[i] 116 117 t2 := ((a>>28 | a<<(64-28)) ^ (a>>34 | a<<(64-34)) ^ (a>>39 | a<<(64-39))) + ((a & b) ^ (a & c) ^ (b & c)) 118 119 h = g 120 g = f 121 f = e 122 e = d + t1 123 d = c 124 c = b 125 b = a 126 a = t1 + t2 127 } 128 129 h0 += a 130 h1 += b 131 h2 += c 132 h3 += d 133 h4 += e 134 h5 += f 135 h6 += g 136 h7 += h 137 138 p = p[_Chunk:] 139 n += _Chunk 140 } 141 142 dig.h[0], dig.h[1], dig.h[2], dig.h[3], dig.h[4], dig.h[5], dig.h[6], dig.h[7] = h0, h1, h2, h3, h4, h5, h6, h7 143 return n 144 }