Skip to content

G
golang
Commit 2db1769d authored by Adam Langley's avatar Adam Langley
Browse files
Options

crypto/block: remove deprecated package. 

R=rsc
CC=golang-dev
https://golang.org/cl/4315051
parent b2bf14ac
Hide whitespace changes
Inline Side-by-side
Showing with 0 additions and 2288 deletions
src/pkg/Makefile
View file @ 2db1769d
......@@ -32,7 +32,6 @@ DIRS=\
container/vector\
crypto\
crypto/aes\
crypto/block\
crypto/blowfish\
crypto/cast5\
crypto/cipher\
......
src/pkg/crypto/block/Makefile deleted 100644 → 0
View file @ b2bf14ac
# 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.
include ../../../Make.inc
TARG=crypto/block
GOFILES=\
cbc.go\
cfb.go\
cipher.go\
cmac.go\
ctr.go\
eax.go\
ecb.go\
ofb.go\
xor.go\
include ../../../Make.pkg
src/pkg/crypto/block/cbc.go deleted 100644 → 0
View file @ b2bf14ac
// 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.
// Cipher block chaining (CBC) mode.
// CBC provides confidentiality by xoring (chaining) each plaintext block
// with the previous ciphertext block before applying the block cipher.
// See NIST SP 800-38A, pp 10-11
package block
import (
"io"
)
type cbcCipher struct {
c Cipher
blockSize int
iv []byte
tmp []byte
}
func newCBC(c Cipher, iv []byte) *cbcCipher {
n := c.BlockSize()
x := new(cbcCipher)
x.c = c
x.blockSize = n
x.iv = dup(iv)
x.tmp = make([]byte, n)
return x
}
func (x *cbcCipher) BlockSize() int { return x.blockSize }
func (x *cbcCipher) Encrypt(dst, src []byte) {
for i := 0; i < x.blockSize; i++ {
x.iv[i] ^= src[i]
}
x.c.Encrypt(x.iv, x.iv)
for i := 0; i < x.blockSize; i++ {
dst[i] = x.iv[i]
}
}
func (x *cbcCipher) Decrypt(dst, src []byte) {
x.c.Decrypt(x.tmp, src)
for i := 0; i < x.blockSize; i++ {
x.tmp[i] ^= x.iv[i]
x.iv[i] = src[i]
dst[i] = x.tmp[i]
}
}
// NewCBCDecrypter returns a reader that reads data from r and decrypts it using c
// in cipher block chaining (CBC) mode with the initialization vector iv.
// The returned Reader does not buffer or read ahead except
// as required by the cipher's block size.
func NewCBCDecrypter(c Cipher, iv []byte, r io.Reader) io.Reader {
return NewECBDecrypter(newCBC(c, iv), r)
}
// NewCBCEncrypter returns a writer that encrypts data using c
// in cipher block chaining (CBC) mode with the initialization vector iv
// and writes the encrypted data to w.
// The returned Writer does no buffering except as required
// by the cipher's block size, so there is no need for a Flush method.
func NewCBCEncrypter(c Cipher, iv []byte, w io.Writer) io.Writer {
return NewECBEncrypter(newCBC(c, iv), w)
}
src/pkg/crypto/block/cfb.go deleted 100644 → 0
View file @ b2bf14ac
// 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.
// Cipher feedback (CFB) mode.
// CFB provides confidentiality by feeding a fraction of
// the previous ciphertext in as the plaintext for the next
// block operation.
// See NIST SP 800-38A, pp 11-13
package block
import (
"io"
)
type cfbCipher struct {
c Cipher
blockSize int // our block size (s/8)
cipherSize int // underlying cipher block size
iv []byte
tmp []byte
}
func newCFB(c Cipher, s int, iv []byte) *cfbCipher {
if s == 0 || s%8 != 0 {
panic("crypto/block: invalid CFB mode")
}
b := c.BlockSize()
x := new(cfbCipher)
x.c = c
x.blockSize = s / 8
x.cipherSize = b
x.iv = dup(iv)
x.tmp = make([]byte, b)
return x
}
func (x *cfbCipher) BlockSize() int { return x.blockSize }
func (x *cfbCipher) Encrypt(dst, src []byte) {
// Encrypt old IV and xor prefix with src to make dst.
x.c.Encrypt(x.tmp, x.iv)
for i := 0; i < x.blockSize; i++ {
dst[i] = src[i] ^ x.tmp[i]
}
// Slide unused IV pieces down and insert dst at end.
for i := 0; i < x.cipherSize-x.blockSize; i++ {
x.iv[i] = x.iv[i+x.blockSize]
}
off := x.cipherSize - x.blockSize
for i := off; i < x.cipherSize; i++ {
x.iv[i] = dst[i-off]
}
}
func (x *cfbCipher) Decrypt(dst, src []byte) {
// Encrypt [sic] old IV and xor prefix with src to make dst.
x.c.Encrypt(x.tmp, x.iv)
for i := 0; i < x.blockSize; i++ {
dst[i] = src[i] ^ x.tmp[i]
}
// Slide unused IV pieces down and insert src at top.
for i := 0; i < x.cipherSize-x.blockSize; i++ {
x.iv[i] = x.iv[i+x.blockSize]
}
off := x.cipherSize - x.blockSize
for i := off; i < x.cipherSize; i++ {
// Reconstruct src = dst ^ x.tmp
// in case we overwrote src (src == dst).
x.iv[i] = dst[i-off] ^ x.tmp[i-off]
}
}
// NewCFBDecrypter returns a reader that reads data from r and decrypts it using c
// in s-bit cipher feedback (CFB) mode with the initialization vector iv.
// The returned Reader does not buffer or read ahead except
// as required by the cipher's block size.
// Modes for s not a multiple of 8 are unimplemented.
func NewCFBDecrypter(c Cipher, s int, iv []byte, r io.Reader) io.Reader {
return NewECBDecrypter(newCFB(c, s, iv), r)
}
// NewCFBEncrypter returns a writer that encrypts data using c
// in s-bit cipher feedback (CFB) mode with the initialization vector iv
// and writes the encrypted data to w.
// The returned Writer does no buffering except as required
// by the cipher's block size, so there is no need for a Flush method.
// Modes for s not a multiple of 8 are unimplemented.
func NewCFBEncrypter(c Cipher, s int, iv []byte, w io.Writer) io.Writer {
return NewECBEncrypter(newCFB(c, s, iv), w)
}
src/pkg/crypto/block/cfb_aes_test.go deleted 100644 → 0
View file @ b2bf14ac
// 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.
// CFB AES test vectors.
// See U.S. National Institute of Standards and Technology (NIST)
// Special Publication 800-38A, ``Recommendation for Block Cipher
// Modes of Operation,'' 2001 Edition, pp. 29-52.
package block
import (
"bytes"
"crypto/aes"
"io"
"testing"
)
type cfbTest struct {
name string
s int
key []byte
iv []byte
in []byte
out []byte
}
var cfbAESTests = []cfbTest{
{
"CFB1-AES128",
1,
commonKey128,
commonIV,
[]byte{
0<<7 | 1<<6 | 1<<5 | 0<<4 | 1<<3 | 0<<2 | 1<<1,
1<<7 | 1<<6 | 0<<5 | 0<<4 | 0<<3 | 0<<2 | 0<<1,
},
[]byte{
0<<7 | 1<<6 | 1<<5 | 0<<4 | 1<<3 | 0<<2 | 0<<1,
1<<7 | 0<<6 | 1<<5 | 1<<4 | 0<<3 | 0<<2 | 1<<1,
},
},
{
"CFB1-AES192",
1,
commonKey192,
commonIV,
[]byte{
0<<7 | 1<<6 | 1<<5 | 0<<4 | 1<<3 | 0<<2 | 1<<1,
1<<7 | 1<<6 | 0<<5 | 0<<4 | 0<<3 | 0<<2 | 0<<1,
},
[]byte{
1<<7 | 0<<6 | 0<<5 | 1<<4 | 0<<3 | 0<<2 | 1<<1,
0<<7 | 1<<6 | 0<<5 | 1<<4 | 1<<3 | 0<<2 | 0<<1,
},
},
{
"CFB1-AES256",
1,
commonKey256,
commonIV,
[]byte{
0<<7 | 1<<6 | 1<<5 | 0<<4 | 1<<3 | 0<<2 | 1<<1,
1<<7 | 1<<6 | 0<<5 | 0<<4 | 0<<3 | 0<<2 | 0<<1,
},
[]byte{
1<<7 | 0<<6 | 0<<5 | 1<<4 | 0<<3 | 0<<2 | 0<<1,
0<<7 | 0<<6 | 1<<5 | 0<<4 | 1<<3 | 0<<2 | 0<<1,
},
},
{
"CFB8-AES128",
8,
commonKey128,
commonIV,
[]byte{
0x6b,
0xc1,
0xbe,
0xe2,
0x2e,
0x40,
0x9f,
0x96,
0xe9,
0x3d,
0x7e,
0x11,
0x73,
0x93,
0x17,
0x2a,
0xae,
0x2d,
},
[]byte{
0x3b,
0x79,
0x42,
0x4c,
0x9c,
0x0d,
0xd4,
0x36,
0xba,
0xce,
0x9e,
0x0e,
0xd4,
0x58,
0x6a,
0x4f,
0x32,
0xb9,
},
},
{
"CFB8-AES192",
8,
commonKey192,
commonIV,
[]byte{
0x6b,
0xc1,
0xbe,
0xe2,
0x2e,
0x40,
0x9f,
0x96,
0xe9,
0x3d,
0x7e,
0x11,
0x73,
0x93,
0x17,
0x2a,
0xae,
0x2d,
},
[]byte{
0xcd,
0xa2,
0x52,
0x1e,
0xf0,
0xa9,
0x05,
0xca,
0x44,
0xcd,
0x05,
0x7c,
0xbf,
0x0d,
0x47,
0xa0,
0x67,
0x8a,
},
},
{
"CFB8-AES256",
8,
commonKey256,
commonIV,
[]byte{
0x6b,
0xc1,
0xbe,
0xe2,
0x2e,
0x40,
0x9f,
0x96,
0xe9,
0x3d,
0x7e,
0x11,
0x73,
0x93,
0x17,
0x2a,
0xae,
0x2d,
},
[]byte{
0xdc,
0x1f,
0x1a,
0x85,
0x20,
0xa6,
0x4d,
0xb5,
0x5f,
0xcc,
0x8a,
0xc5,
0x54,
0x84,
0x4e,
0x88,
0x97,
0x00,
},
},
{
"CFB128-AES128",
128,
commonKey128,
commonIV,
[]byte{
0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10,
},
[]byte{
0x3b, 0x3f, 0xd9, 0x2e, 0xb7, 0x2d, 0xad, 0x20, 0x33, 0x34, 0x49, 0xf8, 0xe8, 0x3c, 0xfb, 0x4a,
0xc8, 0xa6, 0x45, 0x37, 0xa0, 0xb3, 0xa9, 0x3f, 0xcd, 0xe3, 0xcd, 0xad, 0x9f, 0x1c, 0xe5, 0x8b,
0x26, 0x75, 0x1f, 0x67, 0xa3, 0xcb, 0xb1, 0x40, 0xb1, 0x80, 0x8c, 0xf1, 0x87, 0xa4, 0xf4, 0xdf,
0xc0, 0x4b, 0x05, 0x35, 0x7c, 0x5d, 0x1c, 0x0e, 0xea, 0xc4, 0xc6, 0x6f, 0x9f, 0xf7, 0xf2, 0xe6,
},
},
{
"CFB128-AES192",
128,
commonKey192,
commonIV,
[]byte{
0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10,
},
[]byte{
0xcd, 0xc8, 0x0d, 0x6f, 0xdd, 0xf1, 0x8c, 0xab, 0x34, 0xc2, 0x59, 0x09, 0xc9, 0x9a, 0x41, 0x74,
0x67, 0xce, 0x7f, 0x7f, 0x81, 0x17, 0x36, 0x21, 0x96, 0x1a, 0x2b, 0x70, 0x17, 0x1d, 0x3d, 0x7a,
0x2e, 0x1e, 0x8a, 0x1d, 0xd5, 0x9b, 0x88, 0xb1, 0xc8, 0xe6, 0x0f, 0xed, 0x1e, 0xfa, 0xc4, 0xc9,
0xc0, 0x5f, 0x9f, 0x9c, 0xa9, 0x83, 0x4f, 0xa0, 0x42, 0xae, 0x8f, 0xba, 0x58, 0x4b, 0x09, 0xff,
},
},
{
"CFB128-AES256",
128,
commonKey256,
commonIV,
[]byte{
0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10,
},
[]byte{
0xdc, 0x7e, 0x84, 0xbf, 0xda, 0x79, 0x16, 0x4b, 0x7e, 0xcd, 0x84, 0x86, 0x98, 0x5d, 0x38, 0x60,
0x39, 0xff, 0xed, 0x14, 0x3b, 0x28, 0xb1, 0xc8, 0x32, 0x11, 0x3c, 0x63, 0x31, 0xe5, 0x40, 0x7b,
0xdf, 0x10, 0x13, 0x24, 0x15, 0xe5, 0x4b, 0x92, 0xa1, 0x3e, 0xd0, 0xa8, 0x26, 0x7a, 0xe2, 0xf9,
0x75, 0xa3, 0x85, 0x74, 0x1a, 0xb9, 0xce, 0xf8, 0x20, 0x31, 0x62, 0x3d, 0x55, 0xb1, 0xe4, 0x71,
},
},
}
func TestCFB_AES(t *testing.T) {
for _, tt := range cfbAESTests {
test := tt.name
if tt.s == 1 {
// 1-bit CFB not implemented
continue
}
c, err := aes.NewCipher(tt.key)
if err != nil {
t.Errorf("%s: NewCipher(%d bytes) = %s", test, len(tt.key), err)
continue
}
var crypt bytes.Buffer
w := NewCFBEncrypter(c, tt.s, tt.iv, &crypt)
var r io.Reader = bytes.NewBuffer(tt.in)
n, err := io.Copy(w, r)
if n != int64(len(tt.in)) || err != nil {
t.Errorf("%s: CFBEncrypter io.Copy = %d, %v want %d, nil", test, n, err, len(tt.in))
} else if d := crypt.Bytes(); !same(tt.out, d) {
t.Errorf("%s: CFBEncrypter\nhave %x\nwant %x", test, d, tt.out)
}
var plain bytes.Buffer
r = NewCFBDecrypter(c, tt.s, tt.iv, bytes.NewBuffer(tt.out))
w = &plain
n, err = io.Copy(w, r)
if n != int64(len(tt.out)) || err != nil {
t.Errorf("%s: CFBDecrypter io.Copy = %d, %v want %d, nil", test, n, err, len(tt.out))
} else if d := plain.Bytes(); !same(tt.in, d) {
t.Errorf("%s: CFBDecrypter\nhave %x\nwant %x", test, d, tt.in)
}
if t.Failed() {
break
}
}
}
src/pkg/crypto/block/cipher.go deleted 100644 → 0
View file @ b2bf14ac
// 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.
// The block package is deprecated, use cipher instead.
// The block package implements standard block cipher modes
// that can be wrapped around low-level block cipher implementations.
// See http://csrc.nist.gov/groups/ST/toolkit/BCM/current_modes.html
// and NIST Special Publication 800-38A.
package block
// A Cipher represents an implementation of block cipher
// using a given key. It provides the capability to encrypt
// or decrypt individual blocks. The mode implementations
// extend that capability to streams of blocks.
type Cipher interface {
// BlockSize returns the cipher's block size.
BlockSize() int
// Encrypt encrypts the first block in src into dst.
// Src and dst may point at the same memory.
Encrypt(dst, src []byte)
// Decrypt decrypts the first block in src into dst.
// Src and dst may point at the same memory.
Decrypt(dst, src []byte)
}
// Utility routines
func shift1(dst, src []byte) byte {
var b byte
for i := len(src) - 1; i >= 0; i-- {
bb := src[i] >> 7
dst[i] = src[i]<<1 | b
b = bb
}
return b
}
func same(p, q []byte) bool {
if len(p) != len(q) {
return false
}
for i := 0; i < len(p); i++ {
if p[i] != q[i] {
return false
}
}
return true
}
func dup(p []byte) []byte {
q := make([]byte, len(p))
copy(q, p)
return q
}
src/pkg/crypto/block/cmac.go deleted 100644 → 0
View file @ b2bf14ac
// 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.
// CMAC message authentication code, defined in
// NIST Special Publication SP 800-38B.
package block
import (
"hash"
"os"
)
const (
// minimal irreducible polynomial of degree b
r64 = 0x1b
r128 = 0x87
)
type cmac struct {
k1, k2, ci, digest []byte
p int // position in ci
c Cipher
}
// TODO(rsc): Should this return an error instead of panic?
// NewCMAC returns a new instance of a CMAC message authentication code
// digest using the given Cipher.
func NewCMAC(c Cipher) hash.Hash {
var r byte
n := c.BlockSize()
switch n {
case 64 / 8:
r = r64
case 128 / 8:
r = r128
default:
panic("crypto/block: NewCMAC: invalid cipher block size")
}
d := new(cmac)
d.c = c
d.k1 = make([]byte, n)
d.k2 = make([]byte, n)
d.ci = make([]byte, n)
d.digest = make([]byte, n)
// Subkey generation, p. 7
c.Encrypt(d.k1, d.k1)
if shift1(d.k1, d.k1) != 0 {
d.k1[n-1] ^= r
}
if shift1(d.k2, d.k1) != 0 {
d.k2[n-1] ^= r
}
return d
}
// Reset clears the digest state, starting a new digest.
func (d *cmac) Reset() {
for i := range d.ci {
d.ci[i] = 0
}
d.p = 0
}
// Write adds the given data to the digest state.
func (d *cmac) Write(p []byte) (n int, err os.Error) {
// Xor input into ci.
for _, c := range p {
// If ci is full, encrypt and start over.
if d.p >= len(d.ci) {
d.c.Encrypt(d.ci, d.ci)
d.p = 0
}
d.ci[d.p] ^= c
d.p++
}
return len(p), nil
}
// Sum returns the CMAC digest, one cipher block in length,
// of the data written with Write.
func (d *cmac) Sum() []byte {
// Finish last block, mix in key, encrypt.
// Don't edit ci, in case caller wants
// to keep digesting after call to Sum.
k := d.k1
if d.p < len(d.digest) {
k = d.k2
}
for i := 0; i < len(d.ci); i++ {
d.digest[i] = d.ci[i] ^ k[i]
}
if d.p < len(d.digest) {
d.digest[d.p] ^= 0x80
}
d.c.Encrypt(d.digest, d.digest)
return d.digest
}
func (d *cmac) Size() int { return len(d.digest) }
src/pkg/crypto/block/cmac_aes_test.go deleted 100644 → 0
View file @ b2bf14ac
// 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.
// CMAC test vectors. See NIST SP 800-38B, Appendix D.
package block
import (
"crypto/aes"
"testing"
)
type cmacAESTest struct {
key []byte
in []byte
digest []byte
}
var cmacAESTests = []cmacAESTest{
{
commonKey128,
nil,
[]byte{0xbb, 0x1d, 0x69, 0x29, 0xe9, 0x59, 0x37, 0x28, 0x7f, 0xa3, 0x7d, 0x12, 0x9b, 0x75, 0x67, 0x46},
},
{
commonKey128,
[]byte{0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a},
[]byte{0x07, 0x0a, 0x16, 0xb4, 0x6b, 0x4d, 0x41, 0x44, 0xf7, 0x9b, 0xdd, 0x9d, 0xd0, 0x4a, 0x28, 0x7c},
},
{
commonKey128,
[]byte{
0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11,
},
[]byte{0xdf, 0xa6, 0x67, 0x47, 0xde, 0x9a, 0xe6, 0x30, 0x30, 0xca, 0x32, 0x61, 0x14, 0x97, 0xc8, 0x27},
},
{
commonKey128,
[]byte{
0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10,
},
[]byte{0x51, 0xf0, 0xbe, 0xbf, 0x7e, 0x3b, 0x9d, 0x92, 0xfc, 0x49, 0x74, 0x17, 0x79, 0x36, 0x3c, 0xfe},
},
{
commonKey192,
nil,
[]byte{0xd1, 0x7d, 0xdf, 0x46, 0xad, 0xaa, 0xcd, 0xe5, 0x31, 0xca, 0xc4, 0x83, 0xde, 0x7a, 0x93, 0x67},
},
{
commonKey192,
[]byte{0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a},
[]byte{0x9e, 0x99, 0xa7, 0xbf, 0x31, 0xe7, 0x10, 0x90, 0x06, 0x62, 0xf6, 0x5e, 0x61, 0x7c, 0x51, 0x84},
},
{
commonKey192,
[]byte{
0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11,
},
[]byte{0x8a, 0x1d, 0xe5, 0xbe, 0x2e, 0xb3, 0x1a, 0xad, 0x08, 0x9a, 0x82, 0xe6, 0xee, 0x90, 0x8b, 0x0e},
},
{
commonKey192,
[]byte{
0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10,
},
[]byte{0xa1, 0xd5, 0xdf, 0x0e, 0xed, 0x79, 0x0f, 0x79, 0x4d, 0x77, 0x58, 0x96, 0x59, 0xf3, 0x9a, 0x11},
},
{
commonKey256,
nil,
[]byte{0x02, 0x89, 0x62, 0xf6, 0x1b, 0x7b, 0xf8, 0x9e, 0xfc, 0x6b, 0x55, 0x1f, 0x46, 0x67, 0xd9, 0x83},
},
{
commonKey256,
[]byte{0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a},
[]byte{0x28, 0xa7, 0x02, 0x3f, 0x45, 0x2e, 0x8f, 0x82, 0xbd, 0x4b, 0xf2, 0x8d, 0x8c, 0x37, 0xc3, 0x5c},
},
{
commonKey256,
[]byte{
0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11,
},
[]byte{0xaa, 0xf3, 0xd8, 0xf1, 0xde, 0x56, 0x40, 0xc2, 0x32, 0xf5, 0xb1, 0x69, 0xb9, 0xc9, 0x11, 0xe6},
},
{
commonKey256,
[]byte{
0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10,
},
[]byte{0xe1, 0x99, 0x21, 0x90, 0x54, 0x9f, 0x6e, 0xd5, 0x69, 0x6a, 0x2c, 0x05, 0x6c, 0x31, 0x54, 0x10},
},
}
func TestCMAC_AES(t *testing.T) {
for i, tt := range cmacAESTests {
c, err := aes.NewCipher(tt.key)
if err != nil {
t.Errorf("test %d: NewCipher: %s", i, err)
continue
}
d := NewCMAC(c)
n, err := d.Write(tt.in)
if err != nil || n != len(tt.in) {
t.Errorf("test %d: Write %d: %d, %s", i, len(tt.in), n, err)
continue
}
sum := d.Sum()
if !same(sum, tt.digest) {
x := d.(*cmac)
t.Errorf("test %d: digest mismatch\n\twant %x\n\thave %x\n\tk1 %x\n\tk2 %x", i, tt.digest, sum, x.k1, x.k2)
continue
}
}
}
src/pkg/crypto/block/ctr.go deleted 100644 → 0
View file @ b2bf14ac
// 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.
// Counter (CTR) mode.
// CTR converts a block cipher into a stream cipher by
// repeatedly encrypting an incrementing counter and
// xoring the resulting stream of data with the input.
// See NIST SP 800-38A, pp 13-15
package block
import (
"io"
)
type ctrStream struct {
c Cipher
ctr []byte
out []byte
}
func newCTRStream(c Cipher, ctr []byte) *ctrStream {
x := new(ctrStream)
x.c = c
x.ctr = dup(ctr)
x.out = make([]byte, len(ctr))
return x
}
func (x *ctrStream) Next() []byte {
// Next block is encryption of counter.
x.c.Encrypt(x.out, x.ctr)
// Increment counter
for i := len(x.ctr) - 1; i >= 0; i-- {
x.ctr[i]++
if x.ctr[i] != 0 {
break
}
}
return x.out
}
// NewCTRReader returns a reader that reads data from r, decrypts (or encrypts)
// it using c in counter (CTR) mode with the initialization vector iv.
// The returned Reader does not buffer and has no block size.
// In CTR mode, encryption and decryption are the same operation:
// a CTR reader applied to an encrypted stream produces a decrypted
// stream and vice versa.
func NewCTRReader(c Cipher, iv []byte, r io.Reader) io.Reader {
return newXorReader(newCTRStream(c, iv), r)
}
// NewCTRWriter returns a writer that encrypts (or decrypts) data using c
// in counter (CTR) mode with the initialization vector iv
// and writes the encrypted data to w.
// The returned Writer does not buffer and has no block size.
// In CTR mode, encryption and decryption are the same operation:
// a CTR writer applied to an decrypted stream produces an encrypted
// stream and vice versa.
func NewCTRWriter(c Cipher, iv []byte, w io.Writer) io.Writer {
return newXorWriter(newCTRStream(c, iv), w)
}
src/pkg/crypto/block/eax.go deleted 100644 → 0
View file @ b2bf14ac
// 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.
// EAX mode, not a NIST standard (yet).
// EAX provides encryption and authentication.
// EAX targets the same uses as NIST's CCM mode,
// but EAX adds the ability to run in streaming mode.
// See
// http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/proposedmodes/eax/eax-spec.pdf
// http://www.cs.ucdavis.edu/~rogaway/papers/eax.pdf
// What those papers call OMAC is now called CMAC.
package block
import (
"fmt"
"hash"
"io"
"os"
)
// An EAXTagError is returned when the message has failed to authenticate,
// because the tag at the end of the message stream (Read) does not match
// the tag computed from the message itself (Computed).
type EAXTagError struct {
Read []byte
Computed []byte
}
func (e *EAXTagError) String() string {
return fmt.Sprintf("crypto/block: EAX tag mismatch: read %x but computed %x", e.Read, e.Computed)
}
func setupEAX(c Cipher, iv, hdr []byte, tagBytes int) (ctrIV, tag []byte, cmac hash.Hash) {
n := len(iv)
if n != c.BlockSize() {
panic(fmt.Sprintln("crypto/block: EAX: iv length", n, "!=", c.BlockSize()))
}
buf := make([]byte, n) // zeroed
// tag = CMAC(0 + iv) ^ CMAC(1 + hdr) ^ CMAC(2 + data)
cmac = NewCMAC(c)
cmac.Write(buf) // 0
cmac.Write(iv)
sum := cmac.Sum()
ctrIV = dup(sum)
tag = dup(sum[0:tagBytes])
cmac.Reset()
buf[n-1] = 1
cmac.Write(buf) // 1
cmac.Write(hdr)
sum = cmac.Sum()
for i := 0; i < tagBytes; i++ {
tag[i] ^= sum[i]
}
cmac.Reset()
buf[n-1] = 2 // 2
cmac.Write(buf)
return
}
func finishEAX(tag []byte, cmac hash.Hash) {
// Finish CMAC #2 and xor into tag.
sum := cmac.Sum()
for i := range tag {
tag[i] ^= sum[i]
}
}
// Writer adapter. Tees writes into both w and cmac.
// Knows that cmac never returns write errors.
type cmacWriter struct {
w io.Writer
cmac hash.Hash
}
func (cw *cmacWriter) Write(p []byte) (n int, err os.Error) {
n, err = cw.w.Write(p)
cw.cmac.Write(p[0:n])
return
}
// An eaxEncrypter implements the EAX encryption mode.
type eaxEncrypter struct {
ctr io.Writer // CTR encrypter
cw cmacWriter // CTR's output stream
tag []byte
}
// NewEAXEncrypter creates and returns a new EAX encrypter
// using the given cipher c, initialization vector iv, associated data hdr,
// and tag length tagBytes. The encrypter's Write method encrypts
// the data it receives and writes that data to w.
// The encrypter's Close method writes a final authenticating tag to w.
func NewEAXEncrypter(c Cipher, iv []byte, hdr []byte, tagBytes int, w io.Writer) io.WriteCloser {
x := new(eaxEncrypter)
// Create new CTR instance writing to both
// w for encrypted output and cmac for digesting.
x.cw.w = w
var ctrIV []byte
ctrIV, x.tag, x.cw.cmac = setupEAX(c, iv, hdr, tagBytes)
x.ctr = NewCTRWriter(c, ctrIV, &x.cw)
return x
}
func (x *eaxEncrypter) Write(p []byte) (n int, err os.Error) {
return x.ctr.Write(p)
}
func (x *eaxEncrypter) Close() os.Error {
x.ctr = nil // crash if Write is called again
// Write tag.
finishEAX(x.tag, x.cw.cmac)
n, err := x.cw.w.Write(x.tag)
if n != len(x.tag) && err == nil {
err = io.ErrShortWrite
}
return err
}
// Reader adapter. Returns data read from r but hangs
// on to the last len(tag) bytes for itself (returns EOF len(tag)
// bytes early). Also tees all data returned from Read into
// the cmac digest. The "don't return the last t bytes"
// and the "tee into digest" functionality could be separated,
// but the latter half is trivial.
type cmacReader struct {
r io.Reader
cmac hash.Hash
tag []byte
tmp []byte
}
func (cr *cmacReader) Read(p []byte) (n int, err os.Error) {
// TODO(rsc): Maybe fall back to simpler code if
// we recognize the underlying r as a ByteBuffer
// or ByteReader. Then we can just take the last piece
// off at the start.
// First, read a tag-sized chunk.
// It's probably not the tag (unless there's no data).
tag := cr.tag
if len(tag) < cap(tag) {
nt := len(tag)
nn, err1 := io.ReadFull(cr.r, tag[nt:cap(tag)])
tag = tag[0 : nt+nn]
cr.tag = tag
if err1 != nil {
return 0, err1
}
}
tagBytes := len(tag)
if len(p) > 4*tagBytes {
// If p is big, try to read directly into p to avoid a copy.
n, err = cr.r.Read(p[tagBytes:])
if n == 0 {
goto out
}
// copy old tag into p
for i := 0; i < tagBytes; i++ {
p[i] = tag[i]
}
// copy new tag out of p
for i := 0; i < tagBytes; i++ {
tag[i] = p[n+i]
}
goto out
}
// Otherwise, read into p and then slide data
n, err = cr.r.Read(p)
if n == 0 {
goto out
}
// copy tag+p into p+tmp and then swap tmp, tag
tmp := cr.tmp
for i := n + tagBytes - 1; i >= 0; i-- {
var c byte
if i < tagBytes {
c = tag[i]
} else {
c = p[i-tagBytes]
}
if i < n {
p[i] = c
} else {
tmp[i] = c
}
}
cr.tmp, cr.tag = tag, tmp
out:
cr.cmac.Write(p[0:n])
return
}
type eaxDecrypter struct {
ctr io.Reader
cr cmacReader
tag []byte
}
// NewEAXDecrypter creates and returns a new EAX decrypter
// using the given cipher c, initialization vector iv, associated data hdr,
// and tag length tagBytes. The encrypter's Read method decrypts and
// returns data read from r. At r's EOF, the encrypter checks the final
// authenticating tag and returns an EAXTagError if the tag is invalid.
// In that case, the message should be discarded.
// Note that the data stream returned from Read cannot be
// assumed to be valid, authenticated data until Read returns
// 0, nil to signal the end of the data.
func NewEAXDecrypter(c Cipher, iv []byte, hdr []byte, tagBytes int, r io.Reader) io.Reader {
x := new(eaxDecrypter)
x.cr.r = r
x.cr.tag = make([]byte, 0, tagBytes)
x.cr.tmp = make([]byte, 0, tagBytes)
var ctrIV []byte
ctrIV, x.tag, x.cr.cmac = setupEAX(c, iv, hdr, tagBytes)
x.ctr = NewCTRReader(c, ctrIV, &x.cr)
return x
}
func (x *eaxDecrypter) checkTag() os.Error {
x.ctr = nil // crash if Read is called again
finishEAX(x.tag, x.cr.cmac)
if !same(x.tag, x.cr.tag) {
e := new(EAXTagError)
e.Computed = dup(x.tag)
e.Read = dup(x.cr.tag)
return e
}
return nil
}
func (x *eaxDecrypter) Read(p []byte) (n int, err os.Error) {
n, err = x.ctr.Read(p)
if n == 0 && err == nil {
err = x.checkTag()
}
return n, err
}
src/pkg/crypto/block/eax_aes_test.go deleted 100644 → 0
View file @ b2bf14ac
// 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.
package block
import (
"bytes"
"crypto/aes"
"fmt"
"io"
"testing"
)
// Test vectors from http://www.cs.ucdavis.edu/~rogaway/papers/eax.pdf
type eaxAESTest struct {
msg []byte
key []byte
nonce []byte
header []byte
cipher []byte
}
var eaxAESTests = []eaxAESTest{
{
[]byte{},
[]byte{0x23, 0x39, 0x52, 0xDE, 0xE4, 0xD5, 0xED, 0x5F, 0x9B, 0x9C, 0x6D, 0x6F, 0xF8, 0x0F, 0xF4, 0x78},
[]byte{0x62, 0xEC, 0x67, 0xF9, 0xC3, 0xA4, 0xA4, 0x07, 0xFC, 0xB2, 0xA8, 0xC4, 0x90, 0x31, 0xA8, 0xB3},
[]byte{0x6B, 0xFB, 0x91, 0x4F, 0xD0, 0x7E, 0xAE, 0x6B},
[]byte{0xE0, 0x37, 0x83, 0x0E, 0x83, 0x89, 0xF2, 0x7B, 0x02, 0x5A, 0x2D, 0x65, 0x27, 0xE7, 0x9D, 0x01},
},
{
[]byte{0xF7, 0xFB},
[]byte{0x91, 0x94, 0x5D, 0x3F, 0x4D, 0xCB, 0xEE, 0x0B, 0xF4, 0x5E, 0xF5, 0x22, 0x55, 0xF0, 0x95, 0xA4},
[]byte{0xBE, 0xCA, 0xF0, 0x43, 0xB0, 0xA2, 0x3D, 0x84, 0x31, 0x94, 0xBA, 0x97, 0x2C, 0x66, 0xDE, 0xBD},
[]byte{0xFA, 0x3B, 0xFD, 0x48, 0x06, 0xEB, 0x53, 0xFA},
[]byte{0x19, 0xDD, 0x5C, 0x4C, 0x93, 0x31, 0x04, 0x9D, 0x0B, 0xDA, 0xB0, 0x27, 0x74, 0x08, 0xF6, 0x79, 0x67, 0xE5},
},
{
[]byte{0x1A, 0x47, 0xCB, 0x49, 0x33},
[]byte{0x01, 0xF7, 0x4A, 0xD6, 0x40, 0x77, 0xF2, 0xE7, 0x04, 0xC0, 0xF6, 0x0A, 0xDA, 0x3D, 0xD5, 0x23},
[]byte{0x70, 0xC3, 0xDB, 0x4F, 0x0D, 0x26, 0x36, 0x84, 0x00, 0xA1, 0x0E, 0xD0, 0x5D, 0x2B, 0xFF, 0x5E},
[]byte{0x23, 0x4A, 0x34, 0x63, 0xC1, 0x26, 0x4A, 0xC6},
[]byte{0xD8, 0x51, 0xD5, 0xBA, 0xE0, 0x3A, 0x59, 0xF2, 0x38, 0xA2, 0x3E, 0x39, 0x19, 0x9D, 0xC9, 0x26, 0x66, 0x26, 0xC4, 0x0F, 0x80},
},
{
[]byte{0x48, 0x1C, 0x9E, 0x39, 0xB1},
[]byte{0xD0, 0x7C, 0xF6, 0xCB, 0xB7, 0xF3, 0x13, 0xBD, 0xDE, 0x66, 0xB7, 0x27, 0xAF, 0xD3, 0xC5, 0xE8},
[]byte{0x84, 0x08, 0xDF, 0xFF, 0x3C, 0x1A, 0x2B, 0x12, 0x92, 0xDC, 0x19, 0x9E, 0x46, 0xB7, 0xD6, 0x17},
[]byte{0x33, 0xCC, 0xE2, 0xEA, 0xBF, 0xF5, 0xA7, 0x9D},
[]byte{0x63, 0x2A, 0x9D, 0x13, 0x1A, 0xD4, 0xC1, 0x68, 0xA4, 0x22, 0x5D, 0x8E, 0x1F, 0xF7, 0x55, 0x93, 0x99, 0x74, 0xA7, 0xBE, 0xDE},
},
{
[]byte{0x40, 0xD0, 0xC0, 0x7D, 0xA5, 0xE4},
[]byte{0x35, 0xB6, 0xD0, 0x58, 0x00, 0x05, 0xBB, 0xC1, 0x2B, 0x05, 0x87, 0x12, 0x45, 0x57, 0xD2, 0xC2},
[]byte{0xFD, 0xB6, 0xB0, 0x66, 0x76, 0xEE, 0xDC, 0x5C, 0x61, 0xD7, 0x42, 0x76, 0xE1, 0xF8, 0xE8, 0x16},
[]byte{0xAE, 0xB9, 0x6E, 0xAE, 0xBE, 0x29, 0x70, 0xE9},
[]byte{0x07, 0x1D, 0xFE, 0x16, 0xC6, 0x75, 0xCB, 0x06, 0x77, 0xE5, 0x36, 0xF7, 0x3A, 0xFE, 0x6A, 0x14, 0xB7, 0x4E, 0xE4, 0x98, 0x44, 0xDD},
},
{
[]byte{0x4D, 0xE3, 0xB3, 0x5C, 0x3F, 0xC0, 0x39, 0x24, 0x5B, 0xD1, 0xFB, 0x7D},
[]byte{0xBD, 0x8E, 0x6E, 0x11, 0x47, 0x5E, 0x60, 0xB2, 0x68, 0x78, 0x4C, 0x38, 0xC6, 0x2F, 0xEB, 0x22},
[]byte{0x6E, 0xAC, 0x5C, 0x93, 0x07, 0x2D, 0x8E, 0x85, 0x13, 0xF7, 0x50, 0x93, 0x5E, 0x46, 0xDA, 0x1B},
[]byte{0xD4, 0x48, 0x2D, 0x1C, 0xA7, 0x8D, 0xCE, 0x0F},
[]byte{0x83, 0x5B, 0xB4, 0xF1, 0x5D, 0x74, 0x3E, 0x35, 0x0E, 0x72, 0x84, 0x14, 0xAB, 0xB8, 0x64, 0x4F, 0xD6, 0xCC, 0xB8, 0x69, 0x47, 0xC5, 0xE1, 0x05, 0x90, 0x21, 0x0A, 0x4F},
},
{
[]byte{0x8B, 0x0A, 0x79, 0x30, 0x6C, 0x9C, 0xE7, 0xED, 0x99, 0xDA, 0xE4, 0xF8, 0x7F, 0x8D, 0xD6, 0x16, 0x36},
[]byte{0x7C, 0x77, 0xD6, 0xE8, 0x13, 0xBE, 0xD5, 0xAC, 0x98, 0xBA, 0xA4, 0x17, 0x47, 0x7A, 0x2E, 0x7D},
[]byte{0x1A, 0x8C, 0x98, 0xDC, 0xD7, 0x3D, 0x38, 0x39, 0x3B, 0x2B, 0xF1, 0x56, 0x9D, 0xEE, 0xFC, 0x19},
[]byte{0x65, 0xD2, 0x01, 0x79, 0x90, 0xD6, 0x25, 0x28},
[]byte{0x02, 0x08, 0x3E, 0x39, 0x79, 0xDA, 0x01, 0x48, 0x12, 0xF5, 0x9F, 0x11, 0xD5, 0x26, 0x30, 0xDA, 0x30, 0x13, 0x73, 0x27, 0xD1, 0x06, 0x49, 0xB0, 0xAA, 0x6E, 0x1C, 0x18, 0x1D, 0xB6, 0x17, 0xD7, 0xF2},
},
{
[]byte{0x1B, 0xDA, 0x12, 0x2B, 0xCE, 0x8A, 0x8D, 0xBA, 0xF1, 0x87, 0x7D, 0x96, 0x2B, 0x85, 0x92, 0xDD, 0x2D, 0x56},
[]byte{0x5F, 0xFF, 0x20, 0xCA, 0xFA, 0xB1, 0x19, 0xCA, 0x2F, 0xC7, 0x35, 0x49, 0xE2, 0x0F, 0x5B, 0x0D},
[]byte{0xDD, 0xE5, 0x9B, 0x97, 0xD7, 0x22, 0x15, 0x6D, 0x4D, 0x9A, 0xFF, 0x2B, 0xC7, 0x55, 0x98, 0x26},
[]byte{0x54, 0xB9, 0xF0, 0x4E, 0x6A, 0x09, 0x18, 0x9A},
[]byte{0x2E, 0xC4, 0x7B, 0x2C, 0x49, 0x54, 0xA4, 0x89, 0xAF, 0xC7, 0xBA, 0x48, 0x97, 0xED, 0xCD, 0xAE, 0x8C, 0xC3, 0x3B, 0x60, 0x45, 0x05, 0x99, 0xBD, 0x02, 0xC9, 0x63, 0x82, 0x90, 0x2A, 0xEF, 0x7F, 0x83, 0x2A},
},
{
[]byte{0x6C, 0xF3, 0x67, 0x20, 0x87, 0x2B, 0x85, 0x13, 0xF6, 0xEA, 0xB1, 0xA8, 0xA4, 0x44, 0x38, 0xD5, 0xEF, 0x11},
[]byte{0xA4, 0xA4, 0x78, 0x2B, 0xCF, 0xFD, 0x3E, 0xC5, 0xE7, 0xEF, 0x6D, 0x8C, 0x34, 0xA5, 0x61, 0x23},
[]byte{0xB7, 0x81, 0xFC, 0xF2, 0xF7, 0x5F, 0xA5, 0xA8, 0xDE, 0x97, 0xA9, 0xCA, 0x48, 0xE5, 0x22, 0xEC},
[]byte{0x89, 0x9A, 0x17, 0x58, 0x97, 0x56, 0x1D, 0x7E},
[]byte{0x0D, 0xE1, 0x8F, 0xD0, 0xFD, 0xD9, 0x1E, 0x7A, 0xF1, 0x9F, 0x1D, 0x8E, 0xE8, 0x73, 0x39, 0x38, 0xB1, 0xE8, 0xE7, 0xF6, 0xD2, 0x23, 0x16, 0x18, 0x10, 0x2F, 0xDB, 0x7F, 0xE5, 0x5F, 0xF1, 0x99, 0x17, 0x00},
},
{
[]byte{0xCA, 0x40, 0xD7, 0x44, 0x6E, 0x54, 0x5F, 0xFA, 0xED, 0x3B, 0xD1, 0x2A, 0x74, 0x0A, 0x65, 0x9F, 0xFB, 0xBB, 0x3C, 0xEA, 0xB7},
[]byte{0x83, 0x95, 0xFC, 0xF1, 0xE9, 0x5B, 0xEB, 0xD6, 0x97, 0xBD, 0x01, 0x0B, 0xC7, 0x66, 0xAA, 0xC3},
[]byte{0x22, 0xE7, 0xAD, 0xD9, 0x3C, 0xFC, 0x63, 0x93, 0xC5, 0x7E, 0xC0, 0xB3, 0xC1, 0x7D, 0x6B, 0x44},
[]byte{0x12, 0x67, 0x35, 0xFC, 0xC3, 0x20, 0xD2, 0x5A},
[]byte{0xCB, 0x89, 0x20, 0xF8, 0x7A, 0x6C, 0x75, 0xCF, 0xF3, 0x96, 0x27, 0xB5, 0x6E, 0x3E, 0xD1, 0x97, 0xC5, 0x52, 0xD2, 0x95, 0xA7, 0xCF, 0xC4, 0x6A, 0xFC, 0x25, 0x3B, 0x46, 0x52, 0xB1, 0xAF, 0x37, 0x95, 0xB1, 0x24, 0xAB, 0x6E},
},
}
func TestEAXEncrypt_AES(t *testing.T) {
b := new(bytes.Buffer)
for i, tt := range eaxAESTests {
test := fmt.Sprintf("test %d", i)
c, err := aes.NewCipher(tt.key)
if err != nil {
t.Fatalf("%s: NewCipher(%d bytes) = %s", test, len(tt.key), err)
}
b.Reset()
enc := NewEAXEncrypter(c, tt.nonce, tt.header, 16, b)
n, err := io.Copy(enc, bytes.NewBuffer(tt.msg))
if n != int64(len(tt.msg)) || err != nil {
t.Fatalf("%s: io.Copy into encrypter: %d, %s", test, n, err)
}
err = enc.Close()
if err != nil {
t.Fatalf("%s: enc.Close: %s", test, err)
}
if d := b.Bytes(); !same(d, tt.cipher) {
t.Fatalf("%s: got %x want %x", test, d, tt.cipher)
}
}
}
func TestEAXDecrypt_AES(t *testing.T) {
b := new(bytes.Buffer)
for i, tt := range eaxAESTests {
test := fmt.Sprintf("test %d", i)
c, err := aes.NewCipher(tt.key)
if err != nil {
t.Fatalf("%s: NewCipher(%d bytes) = %s", test, len(tt.key), err)
}
b.Reset()
dec := NewEAXDecrypter(c, tt.nonce, tt.header, 16, bytes.NewBuffer(tt.cipher))
n, err := io.Copy(b, dec)
if n != int64(len(tt.msg)) || err != nil {
t.Fatalf("%s: io.Copy into decrypter: %d, %s", test, n, err)
}
if d := b.Bytes(); !same(d, tt.msg) {
t.Fatalf("%s: got %x want %x", test, d, tt.msg)
}
}
}
src/pkg/crypto/block/ecb.go deleted 100644 → 0
View file @ b2bf14ac
// 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.
// Electronic codebook (ECB) mode.
// ECB is a fancy name for ``encrypt and decrypt each block separately.''
// It's a pretty bad thing to do for any large amount of data (more than one block),
// because the individual blocks can still be identified, duplicated, and reordered.
// The ECB implementation exists mainly to provide buffering for
// the other modes, which wrap it by providing modified Ciphers.
// See NIST SP 800-38A, pp 9-10
package block
import (
"io"
"os"
"strconv"
)
type ecbDecrypter struct {
c Cipher
r io.Reader
blockSize int // block size
// Buffered data.
// The buffer buf is used as storage for both
// plain or crypt; at least one of those is nil at any given time.
buf []byte
plain []byte // plain text waiting to be read
crypt []byte // ciphertext waiting to be decrypted
}
// Read into x.crypt until it has a full block or EOF or an error happens.
func (x *ecbDecrypter) fillCrypt() os.Error {
var err os.Error
for len(x.crypt) < x.blockSize {
off := len(x.crypt)
var m int
m, err = x.r.Read(x.crypt[off:x.blockSize])
x.crypt = x.crypt[0 : off+m]
if m == 0 {
break
}
// If an error happened but we got enough
// data to do some decryption, we can decrypt
// first and report the error (with some data) later.
// But if we don't have enough to decrypt,
// have to stop now.
if err != nil && len(x.crypt) < x.blockSize {
break
}
}
return err
}
// Read from plain text buffer into p.
func (x *ecbDecrypter) readPlain(p []byte) int {
n := len(x.plain)
if n > len(p) {
n = len(p)
}
for i := 0; i < n; i++ {
p[i] = x.plain[i]
}
if n < len(x.plain) {
x.plain = x.plain[n:]
} else {
x.plain = nil
}
return n
}
type ecbFragmentError int
func (n ecbFragmentError) String() string {
return "crypto/block: " + strconv.Itoa(int(n)) + "-byte fragment at EOF"
}
func (x *ecbDecrypter) Read(p []byte) (n int, err os.Error) {
if len(p) == 0 {
return
}
// If there's no plaintext waiting and p is not big enough
// to hold a whole cipher block, we'll have to work in the
// cipher text buffer. Set it to non-nil so that the
// code below will fill it.
if x.plain == nil && len(p) < x.blockSize && x.crypt == nil {
x.crypt = x.buf[0:0]
}
// If there is a leftover cipher text buffer,
// try to accumulate a full block.
if x.crypt != nil {
err = x.fillCrypt()
if err != nil || len(x.crypt) == 0 {
return
}
x.c.Decrypt(x.crypt, x.crypt)
x.plain = x.crypt
x.crypt = nil
}
// If there is a leftover plain text buffer, read from it.
if x.plain != nil {
n = x.readPlain(p)
return
}
// Read and decrypt directly in caller's buffer.
n, err = io.ReadAtLeast(x.r, p, x.blockSize)
if err == os.EOF && n > 0 {
// EOF is only okay on block boundary
err = os.ErrorString("block fragment at EOF during decryption")
return
}
var i int
for i = 0; i+x.blockSize <= n; i += x.blockSize {
a := p[i : i+x.blockSize]
x.c.Decrypt(a, a)
}
// There might be an encrypted fringe remaining.
// Save it for next time.
if i < n {
p = p[i:n]
copy(x.buf, p)
x.crypt = x.buf[0:len(p)]
n = i
}
return
}
// NewECBDecrypter returns a reader that reads data from r and decrypts it using c.
// It decrypts by calling c.Decrypt on each block in sequence;
// this mode is known as electronic codebook mode, or ECB.
// The returned Reader does not buffer or read ahead except
// as required by the cipher's block size.
func NewECBDecrypter(c Cipher, r io.Reader) io.Reader {
x := new(ecbDecrypter)
x.c = c
x.r = r
x.blockSize = c.BlockSize()
x.buf = make([]byte, x.blockSize)
return x
}
type ecbEncrypter struct {
c Cipher
w io.Writer
blockSize int
// Buffered data.
// The buffer buf is used as storage for both
// plain or crypt. If both are non-nil, plain
// follows crypt in buf.
buf []byte
plain []byte // plain text waiting to be encrypted
crypt []byte // encrypted text waiting to be written
}
// Flush the x.crypt buffer to x.w.
func (x *ecbEncrypter) flushCrypt() os.Error {
if len(x.crypt) == 0 {
return nil
}
n, err := x.w.Write(x.crypt)
if n < len(x.crypt) {
x.crypt = x.crypt[n:]
if err == nil {
err = io.ErrShortWrite
}
}
if err != nil {
return err
}
x.crypt = nil
return nil
}
// Slide x.plain down to the beginning of x.buf.
// Plain is known to have less than one block of data,
// so this is cheap enough.
func (x *ecbEncrypter) slidePlain() {
if len(x.plain) == 0 {
x.plain = x.buf[0:0]
} else if cap(x.plain) < cap(x.buf) {
copy(x.buf, x.plain)
x.plain = x.buf[0:len(x.plain)]
}
}
// Fill x.plain from the data in p.
// Return the number of bytes copied.
func (x *ecbEncrypter) fillPlain(p []byte) int {
off := len(x.plain)
n := len(p)
if max := cap(x.plain) - off; n > max {
n = max
}
x.plain = x.plain[0 : off+n]
for i := 0; i < n; i++ {
x.plain[off+i] = p[i]
}
return n
}
// Encrypt x.plain; record encrypted range as x.crypt.
func (x *ecbEncrypter) encrypt() {
var i int
n := len(x.plain)
for i = 0; i+x.blockSize <= n; i += x.blockSize {
a := x.plain[i : i+x.blockSize]
x.c.Encrypt(a, a)
}
x.crypt = x.plain[0:i]
x.plain = x.plain[i:n]
}
func (x *ecbEncrypter) Write(p []byte) (n int, err os.Error) {
for {
// If there is data waiting to be written, write it.
// This can happen on the first iteration
// if a write failed in an earlier call.
if err = x.flushCrypt(); err != nil {
return
}
// Now that encrypted data is gone (flush ran),
// perhaps we need to slide the plaintext down.
x.slidePlain()
// Fill plaintext buffer from p.
m := x.fillPlain(p)
if m == 0 {
break
}
n += m
p = p[m:]
// Encrypt, adjusting crypt and plain.
x.encrypt()
// Write x.crypt.
if err = x.flushCrypt(); err != nil {
break
}
}
return
}
// NewECBEncrypter returns a writer that encrypts data using c and writes it to w.
// It encrypts by calling c.Encrypt on each block in sequence;
// this mode is known as electronic codebook mode, or ECB.
// The returned Writer does no buffering except as required
// by the cipher's block size, so there is no need for a Flush method.
func NewECBEncrypter(c Cipher, w io.Writer) io.Writer {
x := new(ecbEncrypter)
x.c = c
x.w = w
x.blockSize = c.BlockSize()
// Create a buffer that is an integral number of blocks.
x.buf = make([]byte, 8192/x.blockSize*x.blockSize)
return x
}
src/pkg/crypto/block/ecb_aes_test.go deleted 100644 → 0
View file @ b2bf14ac
// 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.
// ECB AES test vectors.
// See U.S. National Institute of Standards and Technology (NIST)
// Special Publication 800-38A, ``Recommendation for Block Cipher
// Modes of Operation,'' 2001 Edition, pp. 24-27.
package block
import (
"bytes"
"crypto/aes"
"io"
"testing"
)
type ecbTest struct {
name string
key []byte
in []byte
out []byte
}
var commonInput = []byte{
0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10,
}
var commonKey128 = []byte{0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6, 0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c}
var commonKey192 = []byte{
0x8e, 0x73, 0xb0, 0xf7, 0xda, 0x0e, 0x64, 0x52, 0xc8, 0x10, 0xf3, 0x2b, 0x80, 0x90, 0x79, 0xe5,
0x62, 0xf8, 0xea, 0xd2, 0x52, 0x2c, 0x6b, 0x7b,
}
var commonKey256 = []byte{
0x60, 0x3d, 0xeb, 0x10, 0x15, 0xca, 0x71, 0xbe, 0x2b, 0x73, 0xae, 0xf0, 0x85, 0x7d, 0x77, 0x81,
0x1f, 0x35, 0x2c, 0x07, 0x3b, 0x61, 0x08, 0xd7, 0x2d, 0x98, 0x10, 0xa3, 0x09, 0x14, 0xdf, 0xf4,
}
var commonIV = []byte{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f}
var ecbAESTests = []ecbTest{
// FIPS 197, Appendix B, C
{
"FIPS-197 Appendix B",
commonKey128,
[]byte{0x32, 0x43, 0xf6, 0xa8, 0x88, 0x5a, 0x30, 0x8d, 0x31, 0x31, 0x98, 0xa2, 0xe0, 0x37, 0x07, 0x34},
[]byte{0x39, 0x25, 0x84, 0x1d, 0x02, 0xdc, 0x09, 0xfb, 0xdc, 0x11, 0x85, 0x97, 0x19, 0x6a, 0x0b, 0x32},
},
// NIST SP 800-38A pp 24-27
{
"ECB-AES128",
commonKey128,
commonInput,
[]byte{
0x3a, 0xd7, 0x7b, 0xb4, 0x0d, 0x7a, 0x36, 0x60, 0xa8, 0x9e, 0xca, 0xf3, 0x24, 0x66, 0xef, 0x97,
0xf5, 0xd3, 0xd5, 0x85, 0x03, 0xb9, 0x69, 0x9d, 0xe7, 0x85, 0x89, 0x5a, 0x96, 0xfd, 0xba, 0xaf,
0x43, 0xb1, 0xcd, 0x7f, 0x59, 0x8e, 0xce, 0x23, 0x88, 0x1b, 0x00, 0xe3, 0xed, 0x03, 0x06, 0x88,
0x7b, 0x0c, 0x78, 0x5e, 0x27, 0xe8, 0xad, 0x3f, 0x82, 0x23, 0x20, 0x71, 0x04, 0x72, 0x5d, 0xd4,
},
},
{
"ECB-AES192",
commonKey192,
commonInput,
[]byte{
0xbd, 0x33, 0x4f, 0x1d, 0x6e, 0x45, 0xf2, 0x5f, 0xf7, 0x12, 0xa2, 0x14, 0x57, 0x1f, 0xa5, 0xcc,
0x97, 0x41, 0x04, 0x84, 0x6d, 0x0a, 0xd3, 0xad, 0x77, 0x34, 0xec, 0xb3, 0xec, 0xee, 0x4e, 0xef,
0xef, 0x7a, 0xfd, 0x22, 0x70, 0xe2, 0xe6, 0x0a, 0xdc, 0xe0, 0xba, 0x2f, 0xac, 0xe6, 0x44, 0x4e,
0x9a, 0x4b, 0x41, 0xba, 0x73, 0x8d, 0x6c, 0x72, 0xfb, 0x16, 0x69, 0x16, 0x03, 0xc1, 0x8e, 0x0e,
},
},
{
"ECB-AES256",
commonKey256,
commonInput,
[]byte{
0xf3, 0xee, 0xd1, 0xbd, 0xb5, 0xd2, 0xa0, 0x3c, 0x06, 0x4b, 0x5a, 0x7e, 0x3d, 0xb1, 0x81, 0xf8,
0x59, 0x1c, 0xcb, 0x10, 0xd4, 0x10, 0xed, 0x26, 0xdc, 0x5b, 0xa7, 0x4a, 0x31, 0x36, 0x28, 0x70,
0xb6, 0xed, 0x21, 0xb9, 0x9c, 0xa6, 0xf4, 0xf9, 0xf1, 0x53, 0xe7, 0xb1, 0xbe, 0xaf, 0xed, 0x1d,
0x23, 0x30, 0x4b, 0x7a, 0x39, 0xf9, 0xf3, 0xff, 0x06, 0x7d, 0x8d, 0x8f, 0x9e, 0x24, 0xec, 0xc7,
},
},
}
func TestECB_AES(t *testing.T) {
for _, tt := range ecbAESTests {
test := tt.name
c, err := aes.NewCipher(tt.key)
if err != nil {
t.Errorf("%s: NewCipher(%d bytes) = %s", test, len(tt.key), err)
continue
}
var crypt bytes.Buffer
w := NewECBEncrypter(c, &crypt)
var r io.Reader = bytes.NewBuffer(tt.in)
n, err := io.Copy(w, r)
if n != int64(len(tt.in)) || err != nil {
t.Errorf("%s: ECBReader io.Copy = %d, %v want %d, nil", test, n, err, len(tt.in))
} else if d := crypt.Bytes(); !same(tt.out, d) {
t.Errorf("%s: ECBReader\nhave %x\nwant %x", test, d, tt.out)
}
var plain bytes.Buffer
r = NewECBDecrypter(c, bytes.NewBuffer(tt.out))
w = &plain
n, err = io.Copy(w, r)
if n != int64(len(tt.out)) || err != nil {
t.Errorf("%s: ECBWriter io.Copy = %d, %v want %d, nil", test, n, err, len(tt.out))
} else if d := plain.Bytes(); !same(tt.in, d) {
t.Errorf("%s: ECBWriter\nhave %x\nwant %x", test, d, tt.in)
}
if t.Failed() {
break
}
}
}
src/pkg/crypto/block/ecb_test.go deleted 100644 → 0
View file @ b2bf14ac
// 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.
package block
import (
"bytes"
"fmt"
"io"
"testing"
"testing/iotest"
)
// Simple Cipher for testing: adds an incrementing amount
// to each byte in each
type IncCipher struct {
blockSize int
delta byte
encrypting bool
}
func (c *IncCipher) BlockSize() int { return c.blockSize }
func (c *IncCipher) Encrypt(dst, src []byte) {
if !c.encrypting {
panic("encrypt: not encrypting")
}
if len(src) != c.blockSize || len(dst) != c.blockSize {
panic(fmt.Sprintln("encrypt: wrong block size", c.blockSize, len(src), len(dst)))
}
c.delta++
for i, b := range src {
dst[i] = b + c.delta
}
}
func (c *IncCipher) Decrypt(dst, src []byte) {
if c.encrypting {
panic("decrypt: not decrypting")
}
if len(src) != c.blockSize || len(dst) != c.blockSize {
panic(fmt.Sprintln("decrypt: wrong block size ", c.blockSize, " ", len(src), " ", len(dst)))
}
c.delta--
for i, b := range src {
dst[i] = b + c.delta
}
}
func TestECBEncrypter(t *testing.T) {
var plain, crypt [256]byte
for i := 0; i < len(plain); i++ {
plain[i] = byte(i)
}
b := new(bytes.Buffer)
for block := 1; block <= 64; block *= 2 {
// compute encrypted version
delta := byte(0)
for i := 0; i < len(crypt); i++ {
if i%block == 0 {
delta++
}
crypt[i] = plain[i] + delta
}
for frag := 0; frag < 2; frag++ {
c := &IncCipher{block, 0, true}
b.Reset()
r := bytes.NewBuffer(plain[0:])
w := NewECBEncrypter(c, b)
// copy plain into w in increasingly large chunks: 1, 1, 2, 4, 8, ...
// if frag != 0, move the 1 to the end to cause fragmentation.
if frag == 0 {
_, err := io.Copyn(w, r, 1)
if err != nil {
t.Errorf("block=%d frag=0: first Copyn: %s", block, err)
continue
}
}
for n := 1; n <= len(plain)/2; n *= 2 {
_, err := io.Copyn(w, r, int64(n))
if err != nil {
t.Errorf("block=%d frag=%d: Copyn %d: %s", block, frag, n, err)
}
}
if frag != 0 {
_, err := io.Copyn(w, r, 1)
if err != nil {
t.Errorf("block=%d frag=1: last Copyn: %s", block, err)
continue
}
}
// check output
data := b.Bytes()
if len(data) != len(crypt) {
t.Errorf("block=%d frag=%d: want %d bytes, got %d", block, frag, len(crypt), len(data))
continue
}
if string(data) != string(crypt[0:]) {
t.Errorf("block=%d frag=%d: want %x got %x", block, frag, data, crypt)
}
}
}
}
func testECBDecrypter(t *testing.T, maxio int) {
var readers = []func(io.Reader) io.Reader{
func(r io.Reader) io.Reader { return r },
iotest.OneByteReader,
iotest.HalfReader,
}
var plain, crypt [256]byte
for i := 0; i < len(plain); i++ {
plain[i] = byte(255 - i)
}
b := new(bytes.Buffer)
for block := 1; block <= 64 && block <= maxio; block *= 2 {
// compute encrypted version
delta := byte(0)
for i := 0; i < len(crypt); i++ {
if i%block == 0 {
delta++
}
crypt[i] = plain[i] + delta
}
for mode := 0; mode < len(readers); mode++ {
for frag := 0; frag < 2; frag++ {
test := fmt.Sprintf("block=%d mode=%d frag=%d maxio=%d", block, mode, frag, maxio)
c := &IncCipher{block, 0, false}
b.Reset()
r := NewECBDecrypter(c, readers[mode](bytes.NewBuffer(crypt[0:maxio])))
// read from crypt in increasingly large chunks: 1, 1, 2, 4, 8, ...
// if frag == 1, move the 1 to the end to cause fragmentation.
if frag == 0 {
_, err := io.Copyn(b, r, 1)
if err != nil {
t.Errorf("%s: first Copyn: %s", test, err)
continue
}
}
for n := 1; n <= maxio/2; n *= 2 {
_, err := io.Copyn(b, r, int64(n))
if err != nil {
t.Errorf("%s: Copyn %d: %s", test, n, err)
}
}
if frag != 0 {
_, err := io.Copyn(b, r, 1)
if err != nil {
t.Errorf("%s: last Copyn: %s", test, err)
continue
}
}
// check output
data := b.Bytes()
if len(data) != maxio {
t.Errorf("%s: want %d bytes, got %d", test, maxio, len(data))
continue
}
if string(data) != string(plain[0:maxio]) {
t.Errorf("%s: input=%x want %x got %x", test, crypt[0:maxio], plain[0:maxio], data)
}
}
}
}
}
func TestECBDecrypter(t *testing.T) {
// Do shorter I/O sizes first; they're easier to debug.
for n := 1; n <= 256 && !t.Failed(); n *= 2 {
testECBDecrypter(t, n)
}
}
src/pkg/crypto/block/ofb.go deleted 100644 → 0
View file @ b2bf14ac
// 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.
// Output feedback (OFB) mode.
// OFB converts a block cipher into a stream cipher by
// repeatedly encrypting an initialization vector and
// xoring the resulting stream of data with the input.
// See NIST SP 800-38A, pp 13-15
package block
import (
"fmt"
"io"
)
type ofbStream struct {
c Cipher
iv []byte
}
func newOFBStream(c Cipher, iv []byte) *ofbStream {
x := new(ofbStream)
x.c = c
n := len(iv)
if n != c.BlockSize() {
panic(fmt.Sprintln("crypto/block: newOFBStream: invalid iv size", n, "!=", c.BlockSize()))
}
x.iv = dup(iv)
return x
}
func (x *ofbStream) Next() []byte {
x.c.Encrypt(x.iv, x.iv)
return x.iv
}
// NewOFBReader returns a reader that reads data from r, decrypts (or encrypts)
// it using c in output feedback (OFB) mode with the initialization vector iv.
// The returned Reader does not buffer and has no block size.
// In OFB mode, encryption and decryption are the same operation:
// an OFB reader applied to an encrypted stream produces a decrypted
// stream and vice versa.
func NewOFBReader(c Cipher, iv []byte, r io.Reader) io.Reader {
return newXorReader(newOFBStream(c, iv), r)
}
// NewOFBWriter returns a writer that encrypts (or decrypts) data using c
// in cipher feedback (OFB) mode with the initialization vector iv
// and writes the encrypted data to w.
// The returned Writer does not buffer and has no block size.
// In OFB mode, encryption and decryption are the same operation:
// an OFB writer applied to an decrypted stream produces an encrypted
// stream and vice versa.
func NewOFBWriter(c Cipher, iv []byte, w io.Writer) io.Writer {
return newXorWriter(newOFBStream(c, iv), w)
}
src/pkg/crypto/block/ofb_aes_test.go deleted 100644 → 0
View file @ b2bf14ac
// 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.
// OFB AES test vectors.
// See U.S. National Institute of Standards and Technology (NIST)
// Special Publication 800-38A, ``Recommendation for Block Cipher
// Modes of Operation,'' 2001 Edition, pp. 52-55.
package block
import (
"bytes"
"crypto/aes"
"io"
"testing"
)
type ofbTest struct {
name string
key []byte
iv []byte
in []byte
out []byte
}
var ofbAESTests = []ofbTest{
// NIST SP 800-38A pp 52-55
{
"OFB-AES128",
commonKey128,
commonIV,
commonInput,
[]byte{
0x3b, 0x3f, 0xd9, 0x2e, 0xb7, 0x2d, 0xad, 0x20, 0x33, 0x34, 0x49, 0xf8, 0xe8, 0x3c, 0xfb, 0x4a,
0x77, 0x89, 0x50, 0x8d, 0x16, 0x91, 0x8f, 0x03, 0xf5, 0x3c, 0x52, 0xda, 0xc5, 0x4e, 0xd8, 0x25,
0x97, 0x40, 0x05, 0x1e, 0x9c, 0x5f, 0xec, 0xf6, 0x43, 0x44, 0xf7, 0xa8, 0x22, 0x60, 0xed, 0xcc,
0x30, 0x4c, 0x65, 0x28, 0xf6, 0x59, 0xc7, 0x78, 0x66, 0xa5, 0x10, 0xd9, 0xc1, 0xd6, 0xae, 0x5e,
},
},
{
"OFB-AES192",
commonKey192,
commonIV,
commonInput,
[]byte{
0xcd, 0xc8, 0x0d, 0x6f, 0xdd, 0xf1, 0x8c, 0xab, 0x34, 0xc2, 0x59, 0x09, 0xc9, 0x9a, 0x41, 0x74,
0xfc, 0xc2, 0x8b, 0x8d, 0x4c, 0x63, 0x83, 0x7c, 0x09, 0xe8, 0x17, 0x00, 0xc1, 0x10, 0x04, 0x01,
0x8d, 0x9a, 0x9a, 0xea, 0xc0, 0xf6, 0x59, 0x6f, 0x55, 0x9c, 0x6d, 0x4d, 0xaf, 0x59, 0xa5, 0xf2,
0x6d, 0x9f, 0x20, 0x08, 0x57, 0xca, 0x6c, 0x3e, 0x9c, 0xac, 0x52, 0x4b, 0xd9, 0xac, 0xc9, 0x2a,
},
},
{
"OFB-AES256",
commonKey256,
commonIV,
commonInput,
[]byte{
0xdc, 0x7e, 0x84, 0xbf, 0xda, 0x79, 0x16, 0x4b, 0x7e, 0xcd, 0x84, 0x86, 0x98, 0x5d, 0x38, 0x60,
0x4f, 0xeb, 0xdc, 0x67, 0x40, 0xd2, 0x0b, 0x3a, 0xc8, 0x8f, 0x6a, 0xd8, 0x2a, 0x4f, 0xb0, 0x8d,
0x71, 0xab, 0x47, 0xa0, 0x86, 0xe8, 0x6e, 0xed, 0xf3, 0x9d, 0x1c, 0x5b, 0xba, 0x97, 0xc4, 0x08,
0x01, 0x26, 0x14, 0x1d, 0x67, 0xf3, 0x7b, 0xe8, 0x53, 0x8f, 0x5a, 0x8b, 0xe7, 0x40, 0xe4, 0x84,
},
},
}
func TestOFB_AES(t *testing.T) {
for _, tt := range ofbAESTests {
test := tt.name
c, err := aes.NewCipher(tt.key)
if err != nil {
t.Errorf("%s: NewCipher(%d bytes) = %s", test, len(tt.key), err)
continue
}
for j := 0; j <= 5; j += 5 {
var crypt bytes.Buffer
in := tt.in[0 : len(tt.in)-j]
w := NewOFBWriter(c, tt.iv, &crypt)
var r io.Reader = bytes.NewBuffer(in)
n, err := io.Copy(w, r)
if n != int64(len(in)) || err != nil {
t.Errorf("%s/%d: OFBWriter io.Copy = %d, %v want %d, nil", test, len(in), n, err, len(in))
} else if d, out := crypt.Bytes(), tt.out[0:len(in)]; !same(out, d) {
t.Errorf("%s/%d: OFBWriter\ninpt %x\nhave %x\nwant %x", test, len(in), in, d, out)
}
}
for j := 0; j <= 7; j += 7 {
var plain bytes.Buffer
out := tt.out[0 : len(tt.out)-j]
r := NewOFBReader(c, tt.iv, bytes.NewBuffer(out))
w := &plain
n, err := io.Copy(w, r)
if n != int64(len(out)) || err != nil {
t.Errorf("%s/%d: OFBReader io.Copy = %d, %v want %d, nil", test, len(out), n, err, len(out))
} else if d, in := plain.Bytes(), tt.in[0:len(out)]; !same(in, d) {
t.Errorf("%s/%d: OFBReader\nhave %x\nwant %x", test, len(out), d, in)
}
}
if t.Failed() {
break
}
}
}
src/pkg/crypto/block/xor.go deleted 100644 → 0
View file @ b2bf14ac
// 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.
// Encrypt/decrypt data by xor with a pseudo-random data stream.
package block
import (
"io"
"os"
)
// A dataStream is an interface to an unending stream of data,
// used by XorReader and XorWriter to model a pseudo-random generator.
// Calls to Next() return sequential blocks of data from the stream.
// Each call must return at least one byte: there is no EOF.
type dataStream interface {
Next() []byte
}
type xorReader struct {
r io.Reader
rand dataStream // pseudo-random
buf []byte // data available from last call to rand
}
func newXorReader(rand dataStream, r io.Reader) io.Reader {
x := new(xorReader)
x.r = r
x.rand = rand
return x
}
func (x *xorReader) Read(p []byte) (n int, err os.Error) {
n, err = x.r.Read(p)
// xor input with stream.
bp := 0
buf := x.buf
for i := 0; i < n; i++ {
if bp >= len(buf) {
buf = x.rand.Next()
bp = 0
}
p[i] ^= buf[bp]
bp++
}
x.buf = buf[bp:]
return n, err
}
type xorWriter struct {
w io.Writer
rand dataStream // pseudo-random
buf []byte // last buffer returned by rand
extra []byte // extra random data (use before buf)
work []byte // work space
}
func newXorWriter(rand dataStream, w io.Writer) io.Writer {
x := new(xorWriter)
x.w = w
x.rand = rand
x.work = make([]byte, 4096)
return x
}
func (x *xorWriter) Write(p []byte) (n int, err os.Error) {
for len(p) > 0 {
// Determine next chunk of random data
// and xor with p into x.work.
var chunk []byte
m := len(p)
if nn := len(x.extra); nn > 0 {
// extra points into work, so edit directly
if m > nn {
m = nn
}
for i := 0; i < m; i++ {
x.extra[i] ^= p[i]
}
chunk = x.extra[0:m]
} else {
// xor p ^ buf into work, refreshing buf as needed
if nn := len(x.work); m > nn {
m = nn
}
bp := 0
buf := x.buf
for i := 0; i < m; i++ {
if bp >= len(buf) {
buf = x.rand.Next()
bp = 0
}
x.work[i] = buf[bp] ^ p[i]
bp++
}
x.buf = buf[bp:]
chunk = x.work[0:m]
}
// Write chunk.
var nn int
nn, err = x.w.Write(chunk)
if nn != len(chunk) && err == nil {
err = io.ErrShortWrite
}
if nn < len(chunk) {
// Reconstruct the random bits from the unwritten
// data and save them for next time.
for i := nn; i < m; i++ {
chunk[i] ^= p[i]
}
x.extra = chunk[nn:]
}
n += nn
if err != nil {
return
}
p = p[m:]
}
return
}
src/pkg/crypto/block/xor_test.go deleted 100644 → 0
View file @ b2bf14ac
// 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.
package block
import (
"bytes"
"fmt"
"io"
"testing"
"testing/iotest"
)
// Simple "pseudo-random" stream for testing.
type incStream struct {
buf []byte
n byte
}
func newIncStream(blockSize int) *incStream {
x := new(incStream)
x.buf = make([]byte, blockSize)
return x
}
func (x *incStream) Next() []byte {
x.n++
for i := range x.buf {
x.buf[i] = x.n
x.n++
}
return x.buf
}
func testXorWriter(t *testing.T, maxio int) {
var plain, crypt [256]byte
for i := 0; i < len(plain); i++ {
plain[i] = byte(i)
}
b := new(bytes.Buffer)
for block := 1; block <= 64 && block <= maxio; block *= 2 {
// compute encrypted version
n := byte(0)
for i := 0; i < len(crypt); i++ {
if i%block == 0 {
n++
}
crypt[i] = plain[i] ^ n
n++
}
for frag := 0; frag < 2; frag++ {
test := fmt.Sprintf("block=%d frag=%d maxio=%d", block, frag, maxio)
b.Reset()
r := bytes.NewBuffer(plain[0:])
s := newIncStream(block)
w := newXorWriter(s, b)
// copy plain into w in increasingly large chunks: 1, 1, 2, 4, 8, ...
// if frag != 0, move the 1 to the end to cause fragmentation.
if frag == 0 {
_, err := io.Copyn(w, r, 1)
if err != nil {
t.Errorf("%s: first Copyn: %s", test, err)
continue
}
}
for n := 1; n <= len(plain)/2; n *= 2 {
_, err := io.Copyn(w, r, int64(n))
if err != nil {
t.Errorf("%s: Copyn %d: %s", test, n, err)
}
}
// check output
crypt := crypt[0 : len(crypt)-frag]
data := b.Bytes()
if len(data) != len(crypt) {
t.Errorf("%s: want %d bytes, got %d", test, len(crypt), len(data))
continue
}
if string(data) != string(crypt) {
t.Errorf("%s: want %x got %x", test, data, crypt)
}
}
}
}
func TestXorWriter(t *testing.T) {
// Do shorter I/O sizes first; they're easier to debug.
for n := 1; n <= 256 && !t.Failed(); n *= 2 {
testXorWriter(t, n)
}
}
func testXorReader(t *testing.T, maxio int) {
var readers = []func(io.Reader) io.Reader{
func(r io.Reader) io.Reader { return r },
iotest.OneByteReader,
iotest.HalfReader,
}
var plain, crypt [256]byte
for i := 0; i < len(plain); i++ {
plain[i] = byte(255 - i)
}
b := new(bytes.Buffer)
for block := 1; block <= 64 && block <= maxio; block *= 2 {
// compute encrypted version
n := byte(0)
for i := 0; i < len(crypt); i++ {
if i%block == 0 {
n++
}
crypt[i] = plain[i] ^ n
n++
}
for mode := 0; mode < len(readers); mode++ {
for frag := 0; frag < 2; frag++ {
test := fmt.Sprintf("block=%d mode=%d frag=%d maxio=%d", block, mode, frag, maxio)
s := newIncStream(block)
b.Reset()
r := newXorReader(s, readers[mode](bytes.NewBuffer(crypt[0:maxio])))
// read from crypt in increasingly large chunks: 1, 1, 2, 4, 8, ...
// if frag == 1, move the 1 to the end to cause fragmentation.
if frag == 0 {
_, err := io.Copyn(b, r, 1)
if err != nil {
t.Errorf("%s: first Copyn: %s", test, err)
continue
}
}
for n := 1; n <= maxio/2; n *= 2 {
_, err := io.Copyn(b, r, int64(n))
if err != nil {
t.Errorf("%s: Copyn %d: %s", test, n, err)
}
}
// check output
data := b.Bytes()
crypt := crypt[0 : maxio-frag]
plain := plain[0 : maxio-frag]
if len(data) != len(plain) {
t.Errorf("%s: want %d bytes, got %d", test, len(plain), len(data))
continue
}
if string(data) != string(plain) {
t.Errorf("%s: input=%x want %x got %x", test, crypt, plain, data)
}
}
}
}
}
func TestXorReader(t *testing.T) {
// Do shorter I/O sizes first; they're easier to debug.
for n := 1; n <= 256 && !t.Failed(); n *= 2 {
testXorReader(t, n)
}
}
// TODO(rsc): Test handling of writes after write errors.
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment