+++ /dev/null
-// 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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