| // Copyright 2009 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // SHA512 block step. |
| // In its own file so that a faster assembly or C version |
| // can be substituted easily. |
| |
| package sha512 |
| |
| var _K = []uint64{ |
| 0x428a2f98d728ae22, |
| 0x7137449123ef65cd, |
| 0xb5c0fbcfec4d3b2f, |
| 0xe9b5dba58189dbbc, |
| 0x3956c25bf348b538, |
| 0x59f111f1b605d019, |
| 0x923f82a4af194f9b, |
| 0xab1c5ed5da6d8118, |
| 0xd807aa98a3030242, |
| 0x12835b0145706fbe, |
| 0x243185be4ee4b28c, |
| 0x550c7dc3d5ffb4e2, |
| 0x72be5d74f27b896f, |
| 0x80deb1fe3b1696b1, |
| 0x9bdc06a725c71235, |
| 0xc19bf174cf692694, |
| 0xe49b69c19ef14ad2, |
| 0xefbe4786384f25e3, |
| 0x0fc19dc68b8cd5b5, |
| 0x240ca1cc77ac9c65, |
| 0x2de92c6f592b0275, |
| 0x4a7484aa6ea6e483, |
| 0x5cb0a9dcbd41fbd4, |
| 0x76f988da831153b5, |
| 0x983e5152ee66dfab, |
| 0xa831c66d2db43210, |
| 0xb00327c898fb213f, |
| 0xbf597fc7beef0ee4, |
| 0xc6e00bf33da88fc2, |
| 0xd5a79147930aa725, |
| 0x06ca6351e003826f, |
| 0x142929670a0e6e70, |
| 0x27b70a8546d22ffc, |
| 0x2e1b21385c26c926, |
| 0x4d2c6dfc5ac42aed, |
| 0x53380d139d95b3df, |
| 0x650a73548baf63de, |
| 0x766a0abb3c77b2a8, |
| 0x81c2c92e47edaee6, |
| 0x92722c851482353b, |
| 0xa2bfe8a14cf10364, |
| 0xa81a664bbc423001, |
| 0xc24b8b70d0f89791, |
| 0xc76c51a30654be30, |
| 0xd192e819d6ef5218, |
| 0xd69906245565a910, |
| 0xf40e35855771202a, |
| 0x106aa07032bbd1b8, |
| 0x19a4c116b8d2d0c8, |
| 0x1e376c085141ab53, |
| 0x2748774cdf8eeb99, |
| 0x34b0bcb5e19b48a8, |
| 0x391c0cb3c5c95a63, |
| 0x4ed8aa4ae3418acb, |
| 0x5b9cca4f7763e373, |
| 0x682e6ff3d6b2b8a3, |
| 0x748f82ee5defb2fc, |
| 0x78a5636f43172f60, |
| 0x84c87814a1f0ab72, |
| 0x8cc702081a6439ec, |
| 0x90befffa23631e28, |
| 0xa4506cebde82bde9, |
| 0xbef9a3f7b2c67915, |
| 0xc67178f2e372532b, |
| 0xca273eceea26619c, |
| 0xd186b8c721c0c207, |
| 0xeada7dd6cde0eb1e, |
| 0xf57d4f7fee6ed178, |
| 0x06f067aa72176fba, |
| 0x0a637dc5a2c898a6, |
| 0x113f9804bef90dae, |
| 0x1b710b35131c471b, |
| 0x28db77f523047d84, |
| 0x32caab7b40c72493, |
| 0x3c9ebe0a15c9bebc, |
| 0x431d67c49c100d4c, |
| 0x4cc5d4becb3e42b6, |
| 0x597f299cfc657e2a, |
| 0x5fcb6fab3ad6faec, |
| 0x6c44198c4a475817, |
| } |
| |
| func _Block(dig *digest, p []byte) int { |
| var w [80]uint64 |
| n := 0 |
| 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] |
| for len(p) >= _Chunk { |
| for i := 0; i < 16; i++ { |
| j := i * 8 |
| w[i] = uint64(p[j])<<56 | uint64(p[j+1])<<48 | uint64(p[j+2])<<40 | uint64(p[j+3])<<32 | |
| uint64(p[j+4])<<24 | uint64(p[j+5])<<16 | uint64(p[j+6])<<8 | uint64(p[j+7]) |
| } |
| for i := 16; i < 80; i++ { |
| t1 := (w[i-2]>>19 | w[i-2]<<(64-19)) ^ (w[i-2]>>61 | w[i-2]<<(64-61)) ^ (w[i-2] >> 6) |
| |
| t2 := (w[i-15]>>1 | w[i-15]<<(64-1)) ^ (w[i-15]>>8 | w[i-15]<<(64-8)) ^ (w[i-15] >> 7) |
| |
| w[i] = t1 + w[i-7] + t2 + w[i-16] |
| } |
| |
| a, b, c, d, e, f, g, h := h0, h1, h2, h3, h4, h5, h6, h7 |
| |
| for i := 0; i < 80; i++ { |
| 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] |
| |
| t2 := ((a>>28 | a<<(64-28)) ^ (a>>34 | a<<(64-34)) ^ (a>>39 | a<<(64-39))) + ((a & b) ^ (a & c) ^ (b & c)) |
| |
| h = g |
| g = f |
| f = e |
| e = d + t1 |
| d = c |
| c = b |
| b = a |
| a = t1 + t2 |
| } |
| |
| h0 += a |
| h1 += b |
| h2 += c |
| h3 += d |
| h4 += e |
| h5 += f |
| h6 += g |
| h7 += h |
| |
| p = p[_Chunk:] |
| n += _Chunk |
| } |
| |
| 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 |
| return n |
| } |