mirror of
https://github.com/golang/go
synced 2024-10-03 09:21:21 -06:00
crypto/ripemd160: new package
R=rsc CC=golang-dev https://golang.org/cl/224081
This commit is contained in:
Raif S. Naffah
Russ Cox
parent
bbec504f60
commit
96c9603a43
@ -40,6 +40,7 @@ DIRS=\
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crypto/md4\
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crypto/md5\
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crypto/rc4\
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crypto/ripemd160\
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crypto/rsa\
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crypto/sha1\
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crypto/sha256\
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12
src/pkg/crypto/ripemd160/Makefile
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12
src/pkg/crypto/ripemd160/Makefile
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@ -0,0 +1,12 @@
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# Copyright 2010 The Go Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style
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# license that can be found in the LICENSE file.
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include ../../../Make.$(GOARCH)
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TARG=crypto/ripemd160
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GOFILES=\
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ripemd160.go\
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ripemd160block.go\
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include ../../../Make.pkg
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116
src/pkg/crypto/ripemd160/ripemd160.go
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116
src/pkg/crypto/ripemd160/ripemd160.go
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@ -0,0 +1,116 @@
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// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// This package implements the RIPEMD-160 hash algorithm.
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package ripemd160
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// RIPEMD-160 is designed by by Hans Dobbertin, Antoon Bosselaers, and Bart
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// Preneel with specifications available at:
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// http://homes.esat.kuleuven.be/~cosicart/pdf/AB-9601/AB-9601.pdf.
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import (
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"hash"
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"os"
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)
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// The size of the checksum in bytes.
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const Size = 20
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// The block size of the hash algorithm in bytes.
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const BlockSize = 64
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const (
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_s0 = 0x67452301
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_s1 = 0xefcdab89
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_s2 = 0x98badcfe
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_s3 = 0x10325476
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_s4 = 0xc3d2e1f0
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)
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// digest represents the partial evaluation of a checksum.
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type digest struct {
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s [5]uint32 // running context
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x [BlockSize]byte // temporary buffer
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nx int // index into x
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tc uint64 // total count of bytes processed
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}
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func (d *digest) Reset() {
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d.s[0], d.s[1], d.s[2], d.s[3], d.s[4] = _s0, _s1, _s2, _s3, _s4
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d.nx = 0
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d.tc = 0
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}
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// New returns a new hash.Hash computing the checksum.
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func New() hash.Hash {
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result := new(digest)
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result.Reset()
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return result
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}
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func (d *digest) Size() int { return Size }
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func (d *digest) Write(p []byte) (nn int, err os.Error) {
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nn = len(p)
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d.tc += uint64(nn)
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if d.nx > 0 {
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n := len(p)
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if n > BlockSize-d.nx {
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n = BlockSize - d.nx
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}
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for i := 0; i < n; i++ {
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d.x[d.nx+i] = p[i]
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}
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d.nx += n
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if d.nx == BlockSize {
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_Block(d, &d.x)
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d.nx = 0
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}
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p = p[n:]
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}
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n := _Block(d, p)
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p = p[n:]
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if len(p) > 0 {
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for i, x := range p {
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d.x[i] = x
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}
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d.nx = len(p)
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}
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return
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}
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func (d0 *digest) Sum() []byte {
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// Make a copy of d0 so that caller can keep writing and summing.
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d := new(digest)
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*d = *d0
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// Padding. Add a 1 bit and 0 bits until 56 bytes mod 64.
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tc := d.tc
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var tmp [64]byte
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tmp[0] = 0x80
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if tc%64 < 56 {
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d.Write(tmp[0 : 56-tc%64])
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} else {
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d.Write(tmp[0 : 64+56-tc%64])
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}
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// Length in bits.
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tc <<= 3
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for i := uint(0); i < 8; i++ {
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tmp[i] = byte(tc >> (8 * i))
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}
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d.Write(tmp[0:8])
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if d.nx != 0 {
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panicln("oops")
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}
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p := make([]byte, 20)
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j := 0
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for _, s := range d.s {
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p[j], p[j+1], p[j+2], p[j+3] = byte(s), byte(s>>8), byte(s>>16), byte(s>>24)
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j += 4
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}
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return p
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}
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64
src/pkg/crypto/ripemd160/ripemd160_test.go
Normal file
64
src/pkg/crypto/ripemd160/ripemd160_test.go
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@ -0,0 +1,64 @@
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// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package ripemd160
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// Test vectors are from:
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// http://homes.esat.kuleuven.be/~bosselae/ripemd160.html
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import (
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"fmt"
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"io"
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"testing"
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)
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type mdTest struct {
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out string
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in string
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}
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var vectors = [...]mdTest{
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mdTest{"9c1185a5c5e9fc54612808977ee8f548b2258d31", ""},
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mdTest{"0bdc9d2d256b3ee9daae347be6f4dc835a467ffe", "a"},
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mdTest{"8eb208f7e05d987a9b044a8e98c6b087f15a0bfc", "abc"},
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mdTest{"5d0689ef49d2fae572b881b123a85ffa21595f36", "message digest"},
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mdTest{"f71c27109c692c1b56bbdceb5b9d2865b3708dbc", "abcdefghijklmnopqrstuvwxyz"},
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mdTest{"12a053384a9c0c88e405a06c27dcf49ada62eb2b", "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"},
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mdTest{"b0e20b6e3116640286ed3a87a5713079b21f5189", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"},
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mdTest{"9b752e45573d4b39f4dbd3323cab82bf63326bfb", "12345678901234567890123456789012345678901234567890123456789012345678901234567890"},
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}
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func TestVectors(t *testing.T) {
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for i := 0; i < len(vectors); i++ {
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tv := vectors[i]
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md := New()
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for j := 0; j < 3; j++ {
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if j < 2 {
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io.WriteString(md, tv.in)
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} else {
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io.WriteString(md, tv.in[0:len(tv.in)/2])
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md.Sum()
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io.WriteString(md, tv.in[len(tv.in)/2:])
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}
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s := fmt.Sprintf("%x", md.Sum())
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if s != tv.out {
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t.Fatalf("RIPEMD-160[%d](%s) = %s, expected %s", j, tv.in, s, tv.out)
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}
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md.Reset()
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}
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}
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}
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func TestMillionA(t *testing.T) {
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md := New()
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for i := 0; i < 100000; i++ {
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io.WriteString(md, "aaaaaaaaaa")
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}
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out := "52783243c1697bdbe16d37f97f68f08325dc1528"
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s := fmt.Sprintf("%x", md.Sum())
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if s != out {
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t.Fatalf("RIPEMD-160 (1 million 'a') = %s, expected %s", s, out)
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}
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md.Reset()
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}
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161
src/pkg/crypto/ripemd160/ripemd160block.go
Normal file
161
src/pkg/crypto/ripemd160/ripemd160block.go
Normal file
@ -0,0 +1,161 @@
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// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// RIPEMD-160 block step.
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// In its own file so that a faster assembly or C version
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// can be substituted easily.
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package ripemd160
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// work buffer indices and roll amounts for one line
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var _n = [80]uint{
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
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3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
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1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
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4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13,
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}
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var _r = [80]uint{
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11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
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7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
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11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
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11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
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9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6,
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}
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// same for the other parallel one
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var n_ = [80]uint{
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5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
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6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
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15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
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8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
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12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11,
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}
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var r_ = [80]uint{
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8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
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9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
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9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
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15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
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8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11,
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}
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func _Block(md *digest, p []byte) int {
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n := 0
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var x [16]uint32
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var alpha, beta uint32
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for len(p) >= BlockSize {
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a, b, c, d, e := md.s[0], md.s[1], md.s[2], md.s[3], md.s[4]
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aa, bb, cc, dd, ee := a, b, c, d, e
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j := 0
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for i := 0; i < 16; i++ {
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x[i] = uint32(p[j]) | uint32(p[j+1])<<8 | uint32(p[j+2])<<16 | uint32(p[j+3])<<24
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j += 4
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}
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// round 1
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i := 0
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for i < 16 {
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alpha = a + (b ^ c ^ d) + x[_n[i]]
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s := _r[i]
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alpha = (alpha<<s | alpha>>(32-s)) + e
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beta = c<<10 | c>>22
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a, b, c, d, e = e, alpha, b, beta, d
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// parallel line
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alpha = aa + (bb ^ (cc | ^dd)) + x[n_[i]] + 0x50a28be6
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s = r_[i]
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alpha = (alpha<<s | alpha>>(32-s)) + ee
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beta = cc<<10 | cc>>22
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aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
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i++
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}
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// round 2
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for i < 32 {
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alpha = a + (b&c | ^b&d) + x[_n[i]] + 0x5a827999
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s := _r[i]
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alpha = (alpha<<s | alpha>>(32-s)) + e
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beta = c<<10 | c>>22
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a, b, c, d, e = e, alpha, b, beta, d
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// parallel line
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alpha = aa + (bb&dd | cc&^dd) + x[n_[i]] + 0x5c4dd124
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s = r_[i]
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alpha = (alpha<<s | alpha>>(32-s)) + ee
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beta = cc<<10 | cc>>22
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aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
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i++
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}
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// round 3
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for i < 48 {
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alpha = a + (b | ^c ^ d) + x[_n[i]] + 0x6ed9eba1
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s := _r[i]
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alpha = (alpha<<s | alpha>>(32-s)) + e
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beta = c<<10 | c>>22
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a, b, c, d, e = e, alpha, b, beta, d
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// parallel line
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alpha = aa + (bb | ^cc ^ dd) + x[n_[i]] + 0x6d703ef3
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s = r_[i]
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alpha = (alpha<<s | alpha>>(32-s)) + ee
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beta = cc<<10 | cc>>22
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aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
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i++
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}
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// round 4
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for i < 64 {
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alpha = a + (b&d | c&^d) + x[_n[i]] + 0x8f1bbcdc
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s := _r[i]
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alpha = (alpha<<s | alpha>>(32-s)) + e
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beta = c<<10 | c>>22
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a, b, c, d, e = e, alpha, b, beta, d
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// parallel line
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alpha = aa + (bb&cc | ^bb&dd) + x[n_[i]] + 0x7a6d76e9
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s = r_[i]
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alpha = (alpha<<s | alpha>>(32-s)) + ee
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beta = cc<<10 | cc>>22
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aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
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i++
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}
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// round 5
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for i < 80 {
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alpha = a + (b ^ (c | ^d)) + x[_n[i]] + 0xa953fd4e
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s := _r[i]
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alpha = (alpha<<s | alpha>>(32-s)) + e
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beta = c<<10 | c>>22
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a, b, c, d, e = e, alpha, b, beta, d
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// parallel line
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alpha = aa + (bb ^ cc ^ dd) + x[n_[i]]
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s = r_[i]
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alpha = (alpha<<s | alpha>>(32-s)) + ee
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beta = cc<<10 | cc>>22
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aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
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i++
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}
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// combine results
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dd += c + md.s[1]
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md.s[1] = md.s[2] + d + ee
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md.s[2] = md.s[3] + e + aa
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md.s[3] = md.s[4] + a + bb
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md.s[4] = md.s[0] + b + cc
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md.s[0] = dd
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p = p[BlockSize:]
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n += BlockSize
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}
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return n
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}
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