/usr/share/gocode/src/golang.org/x/crypto/ripemd160/ripemd160block.go is in golang-golang-x-crypto-dev 1:0.0~git20170407.0.55a552f+REALLY.0.0~git20161012.0.5f31782-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 | // Copyright 2010 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.
// RIPEMD-160 block step.
// In its own file so that a faster assembly or C version
// can be substituted easily.
package ripemd160
// work buffer indices and roll amounts for one line
var _n = [80]uint{
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13,
}
var _r = [80]uint{
11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6,
}
// same for the other parallel one
var n_ = [80]uint{
5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11,
}
var r_ = [80]uint{
8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11,
}
func _Block(md *digest, p []byte) int {
n := 0
var x [16]uint32
var alpha, beta uint32
for len(p) >= BlockSize {
a, b, c, d, e := md.s[0], md.s[1], md.s[2], md.s[3], md.s[4]
aa, bb, cc, dd, ee := a, b, c, d, e
j := 0
for i := 0; i < 16; i++ {
x[i] = uint32(p[j]) | uint32(p[j+1])<<8 | uint32(p[j+2])<<16 | uint32(p[j+3])<<24
j += 4
}
// round 1
i := 0
for i < 16 {
alpha = a + (b ^ c ^ d) + x[_n[i]]
s := _r[i]
alpha = (alpha<<s | alpha>>(32-s)) + e
beta = c<<10 | c>>22
a, b, c, d, e = e, alpha, b, beta, d
// parallel line
alpha = aa + (bb ^ (cc | ^dd)) + x[n_[i]] + 0x50a28be6
s = r_[i]
alpha = (alpha<<s | alpha>>(32-s)) + ee
beta = cc<<10 | cc>>22
aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
i++
}
// round 2
for i < 32 {
alpha = a + (b&c | ^b&d) + x[_n[i]] + 0x5a827999
s := _r[i]
alpha = (alpha<<s | alpha>>(32-s)) + e
beta = c<<10 | c>>22
a, b, c, d, e = e, alpha, b, beta, d
// parallel line
alpha = aa + (bb&dd | cc&^dd) + x[n_[i]] + 0x5c4dd124
s = r_[i]
alpha = (alpha<<s | alpha>>(32-s)) + ee
beta = cc<<10 | cc>>22
aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
i++
}
// round 3
for i < 48 {
alpha = a + (b | ^c ^ d) + x[_n[i]] + 0x6ed9eba1
s := _r[i]
alpha = (alpha<<s | alpha>>(32-s)) + e
beta = c<<10 | c>>22
a, b, c, d, e = e, alpha, b, beta, d
// parallel line
alpha = aa + (bb | ^cc ^ dd) + x[n_[i]] + 0x6d703ef3
s = r_[i]
alpha = (alpha<<s | alpha>>(32-s)) + ee
beta = cc<<10 | cc>>22
aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
i++
}
// round 4
for i < 64 {
alpha = a + (b&d | c&^d) + x[_n[i]] + 0x8f1bbcdc
s := _r[i]
alpha = (alpha<<s | alpha>>(32-s)) + e
beta = c<<10 | c>>22
a, b, c, d, e = e, alpha, b, beta, d
// parallel line
alpha = aa + (bb&cc | ^bb&dd) + x[n_[i]] + 0x7a6d76e9
s = r_[i]
alpha = (alpha<<s | alpha>>(32-s)) + ee
beta = cc<<10 | cc>>22
aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
i++
}
// round 5
for i < 80 {
alpha = a + (b ^ (c | ^d)) + x[_n[i]] + 0xa953fd4e
s := _r[i]
alpha = (alpha<<s | alpha>>(32-s)) + e
beta = c<<10 | c>>22
a, b, c, d, e = e, alpha, b, beta, d
// parallel line
alpha = aa + (bb ^ cc ^ dd) + x[n_[i]]
s = r_[i]
alpha = (alpha<<s | alpha>>(32-s)) + ee
beta = cc<<10 | cc>>22
aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
i++
}
// combine results
dd += c + md.s[1]
md.s[1] = md.s[2] + d + ee
md.s[2] = md.s[3] + e + aa
md.s[3] = md.s[4] + a + bb
md.s[4] = md.s[0] + b + cc
md.s[0] = dd
p = p[BlockSize:]
n += BlockSize
}
return n
}
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