libgo/go/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 }