18 files changed, 0 insertions, 1901 deletions
diff --git a/src/pkg/crypto/cipher/benchmark_test.go b/src/pkg/crypto/cipher/benchmark_test.go
deleted file mode 100644
index 027b24851..000000000
--- a/src/pkg/crypto/cipher/benchmark_test.go
+++ /dev/null
@@ -1,139 +0,0 @@
-// Copyright 2013 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 cipher_test
-
-import (
-	"crypto/aes"
-	"crypto/cipher"
-	"testing"
-)
-
-func BenchmarkAESGCMSeal1K(b *testing.B) {
-	buf := make([]byte, 1024)
-	b.SetBytes(int64(len(buf)))
-
-	var key [16]byte
-	var nonce [12]byte
-	aes, _ := aes.NewCipher(key[:])
-	aesgcm, _ := cipher.NewGCM(aes)
-	var out []byte
-
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		out = aesgcm.Seal(out[:0], nonce[:], buf, nonce[:])
-	}
-}
-
-func BenchmarkAESGCMOpen1K(b *testing.B) {
-	buf := make([]byte, 1024)
-	b.SetBytes(int64(len(buf)))
-
-	var key [16]byte
-	var nonce [12]byte
-	aes, _ := aes.NewCipher(key[:])
-	aesgcm, _ := cipher.NewGCM(aes)
-	var out []byte
-	out = aesgcm.Seal(out[:0], nonce[:], buf, nonce[:])
-
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		_, err := aesgcm.Open(buf[:0], nonce[:], out, nonce[:])
-		if err != nil {
-			b.Errorf("Open: %v", err)
-		}
-	}
-}
-
-// If we test exactly 1K blocks, we would generate exact multiples of
-// the cipher's block size, and the cipher stream fragments would
-// always be wordsize aligned, whereas non-aligned is a more typical
-// use-case.
-const almost1K = 1024 - 5
-
-func BenchmarkAESCFBEncrypt1K(b *testing.B) {
-	buf := make([]byte, almost1K)
-	b.SetBytes(int64(len(buf)))
-
-	var key [16]byte
-	var iv [16]byte
-	aes, _ := aes.NewCipher(key[:])
-	ctr := cipher.NewCFBEncrypter(aes, iv[:])
-
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		ctr.XORKeyStream(buf, buf)
-	}
-}
-
-func BenchmarkAESCFBDecrypt1K(b *testing.B) {
-	buf := make([]byte, almost1K)
-	b.SetBytes(int64(len(buf)))
-
-	var key [16]byte
-	var iv [16]byte
-	aes, _ := aes.NewCipher(key[:])
-	ctr := cipher.NewCFBDecrypter(aes, iv[:])
-
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		ctr.XORKeyStream(buf, buf)
-	}
-}
-
-func BenchmarkAESOFB1K(b *testing.B) {
-	buf := make([]byte, almost1K)
-	b.SetBytes(int64(len(buf)))
-
-	var key [16]byte
-	var iv [16]byte
-	aes, _ := aes.NewCipher(key[:])
-	ctr := cipher.NewOFB(aes, iv[:])
-
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		ctr.XORKeyStream(buf, buf)
-	}
-}
-
-func BenchmarkAESCTR1K(b *testing.B) {
-	buf := make([]byte, almost1K)
-	b.SetBytes(int64(len(buf)))
-
-	var key [16]byte
-	var iv [16]byte
-	aes, _ := aes.NewCipher(key[:])
-	ctr := cipher.NewCTR(aes, iv[:])
-
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		ctr.XORKeyStream(buf, buf)
-	}
-}
-
-func BenchmarkAESCBCEncrypt1K(b *testing.B) {
-	buf := make([]byte, 1024)
-	b.SetBytes(int64(len(buf)))
-
-	var key [16]byte
-	var iv [16]byte
-	aes, _ := aes.NewCipher(key[:])
-	cbc := cipher.NewCBCEncrypter(aes, iv[:])
-	for i := 0; i < b.N; i++ {
-		cbc.CryptBlocks(buf, buf)
-	}
-}
-
-func BenchmarkAESCBCDecrypt1K(b *testing.B) {
-	buf := make([]byte, 1024)
-	b.SetBytes(int64(len(buf)))
-
-	var key [16]byte
-	var iv [16]byte
-	aes, _ := aes.NewCipher(key[:])
-	cbc := cipher.NewCBCDecrypter(aes, iv[:])
-	for i := 0; i < b.N; i++ {
-		cbc.CryptBlocks(buf, buf)
-	}
-}
diff --git a/src/pkg/crypto/cipher/cbc.go b/src/pkg/crypto/cipher/cbc.go
deleted file mode 100644
index 241e122ee..000000000
--- a/src/pkg/crypto/cipher/cbc.go
+++ /dev/null
@@ -1,133 +0,0 @@
-// 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 cipher
-
-type cbc struct {
-	b         Block
-	blockSize int
-	iv        []byte
-	tmp       []byte
-}
-
-func newCBC(b Block, iv []byte) *cbc {
-	return &cbc{
-		b:         b,
-		blockSize: b.BlockSize(),
-		iv:        dup(iv),
-		tmp:       make([]byte, b.BlockSize()),
-	}
-}
-
-type cbcEncrypter cbc
-
-// NewCBCEncrypter returns a BlockMode which encrypts in cipher block chaining
-// mode, using the given Block. The length of iv must be the same as the
-// Block's block size.
-func NewCBCEncrypter(b Block, iv []byte) BlockMode {
-	if len(iv) != b.BlockSize() {
-		panic("cipher.NewCBCEncrypter: IV length must equal block size")
-	}
-	return (*cbcEncrypter)(newCBC(b, iv))
-}
-
-func (x *cbcEncrypter) BlockSize() int { return x.blockSize }
-
-func (x *cbcEncrypter) CryptBlocks(dst, src []byte) {
-	if len(src)%x.blockSize != 0 {
-		panic("crypto/cipher: input not full blocks")
-	}
-	if len(dst) < len(src) {
-		panic("crypto/cipher: output smaller than input")
-	}
-
-	iv := x.iv
-
-	for len(src) > 0 {
-		// Write the xor to dst, then encrypt in place.
-		xorBytes(dst[:x.blockSize], src[:x.blockSize], iv)
-		x.b.Encrypt(dst[:x.blockSize], dst[:x.blockSize])
-
-		// Move to the next block with this block as the next iv.
-		iv = dst[:x.blockSize]
-		src = src[x.blockSize:]
-		dst = dst[x.blockSize:]
-	}
-
-	// Save the iv for the next CryptBlocks call.
-	copy(x.iv, iv)
-}
-
-func (x *cbcEncrypter) SetIV(iv []byte) {
-	if len(iv) != len(x.iv) {
-		panic("cipher: incorrect length IV")
-	}
-	copy(x.iv, iv)
-}
-
-type cbcDecrypter cbc
-
-// NewCBCDecrypter returns a BlockMode which decrypts in cipher block chaining
-// mode, using the given Block. The length of iv must be the same as the
-// Block's block size and must match the iv used to encrypt the data.
-func NewCBCDecrypter(b Block, iv []byte) BlockMode {
-	if len(iv) != b.BlockSize() {
-		panic("cipher.NewCBCDecrypter: IV length must equal block size")
-	}
-	return (*cbcDecrypter)(newCBC(b, iv))
-}
-
-func (x *cbcDecrypter) BlockSize() int { return x.blockSize }
-
-func (x *cbcDecrypter) CryptBlocks(dst, src []byte) {
-	if len(src)%x.blockSize != 0 {
-		panic("crypto/cipher: input not full blocks")
-	}
-	if len(dst) < len(src) {
-		panic("crypto/cipher: output smaller than input")
-	}
-	if len(src) == 0 {
-		return
-	}
-
-	// For each block, we need to xor the decrypted data with the previous block's ciphertext (the iv).
-	// To avoid making a copy each time, we loop over the blocks BACKWARDS.
-	end := len(src)
-	start := end - x.blockSize
-	prev := start - x.blockSize
-
-	// Copy the last block of ciphertext in preparation as the new iv.
-	copy(x.tmp, src[start:end])
-
-	// Loop over all but the first block.
-	for start > 0 {
-		x.b.Decrypt(dst[start:end], src[start:end])
-		xorBytes(dst[start:end], dst[start:end], src[prev:start])
-
-		end = start
-		start = prev
-		prev -= x.blockSize
-	}
-
-	// The first block is special because it uses the saved iv.
-	x.b.Decrypt(dst[start:end], src[start:end])
-	xorBytes(dst[start:end], dst[start:end], x.iv)
-
-	// Set the new iv to the first block we copied earlier.
-	x.iv, x.tmp = x.tmp, x.iv
-}
-
-func (x *cbcDecrypter) SetIV(iv []byte) {
-	if len(iv) != len(x.iv) {
-		panic("cipher: incorrect length IV")
-	}
-	copy(x.iv, iv)
-}
diff --git a/src/pkg/crypto/cipher/cbc_aes_test.go b/src/pkg/crypto/cipher/cbc_aes_test.go
deleted file mode 100644
index bf9e7ad70..000000000
--- a/src/pkg/crypto/cipher/cbc_aes_test.go
+++ /dev/null
@@ -1,104 +0,0 @@
-// 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.
-
-// CBC 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. 24-29.
-
-package cipher_test
-
-import (
-	"bytes"
-	"crypto/aes"
-	"crypto/cipher"
-	"testing"
-)
-
-var cbcAESTests = []struct {
-	name string
-	key  []byte
-	iv   []byte
-	in   []byte
-	out  []byte
-}{
-	// NIST SP 800-38A pp 27-29
-	{
-		"CBC-AES128",
-		commonKey128,
-		commonIV,
-		commonInput,
-		[]byte{
-			0x76, 0x49, 0xab, 0xac, 0x81, 0x19, 0xb2, 0x46, 0xce, 0xe9, 0x8e, 0x9b, 0x12, 0xe9, 0x19, 0x7d,
-			0x50, 0x86, 0xcb, 0x9b, 0x50, 0x72, 0x19, 0xee, 0x95, 0xdb, 0x11, 0x3a, 0x91, 0x76, 0x78, 0xb2,
-			0x73, 0xbe, 0xd6, 0xb8, 0xe3, 0xc1, 0x74, 0x3b, 0x71, 0x16, 0xe6, 0x9e, 0x22, 0x22, 0x95, 0x16,
-			0x3f, 0xf1, 0xca, 0xa1, 0x68, 0x1f, 0xac, 0x09, 0x12, 0x0e, 0xca, 0x30, 0x75, 0x86, 0xe1, 0xa7,
-		},
-	},
-	{
-		"CBC-AES192",
-		commonKey192,
-		commonIV,
-		commonInput,
-		[]byte{
-			0x4f, 0x02, 0x1d, 0xb2, 0x43, 0xbc, 0x63, 0x3d, 0x71, 0x78, 0x18, 0x3a, 0x9f, 0xa0, 0x71, 0xe8,
-			0xb4, 0xd9, 0xad, 0xa9, 0xad, 0x7d, 0xed, 0xf4, 0xe5, 0xe7, 0x38, 0x76, 0x3f, 0x69, 0x14, 0x5a,
-			0x57, 0x1b, 0x24, 0x20, 0x12, 0xfb, 0x7a, 0xe0, 0x7f, 0xa9, 0xba, 0xac, 0x3d, 0xf1, 0x02, 0xe0,
-			0x08, 0xb0, 0xe2, 0x79, 0x88, 0x59, 0x88, 0x81, 0xd9, 0x20, 0xa9, 0xe6, 0x4f, 0x56, 0x15, 0xcd,
-		},
-	},
-	{
-		"CBC-AES256",
-		commonKey256,
-		commonIV,
-		commonInput,
-		[]byte{
-			0xf5, 0x8c, 0x4c, 0x04, 0xd6, 0xe5, 0xf1, 0xba, 0x77, 0x9e, 0xab, 0xfb, 0x5f, 0x7b, 0xfb, 0xd6,
-			0x9c, 0xfc, 0x4e, 0x96, 0x7e, 0xdb, 0x80, 0x8d, 0x67, 0x9f, 0x77, 0x7b, 0xc6, 0x70, 0x2c, 0x7d,
-			0x39, 0xf2, 0x33, 0x69, 0xa9, 0xd9, 0xba, 0xcf, 0xa5, 0x30, 0xe2, 0x63, 0x04, 0x23, 0x14, 0x61,
-			0xb2, 0xeb, 0x05, 0xe2, 0xc3, 0x9b, 0xe9, 0xfc, 0xda, 0x6c, 0x19, 0x07, 0x8c, 0x6a, 0x9d, 0x1b,
-		},
-	},
-}
-
-func TestCBCEncrypterAES(t *testing.T) {
-	for _, test := range cbcAESTests {
-		c, err := aes.NewCipher(test.key)
-		if err != nil {
-			t.Errorf("%s: NewCipher(%d bytes) = %s", test.name, len(test.key), err)
-			continue
-		}
-
-		encrypter := cipher.NewCBCEncrypter(c, test.iv)
-
-		data := make([]byte, len(test.in))
-		copy(data, test.in)
-
-		encrypter.CryptBlocks(data, data)
-		if !bytes.Equal(test.out, data) {
-			t.Errorf("%s: CBCEncrypter\nhave %x\nwant %x", test.name, data, test.out)
-		}
-	}
-}
-
-func TestCBCDecrypterAES(t *testing.T) {
-	for _, test := range cbcAESTests {
-		c, err := aes.NewCipher(test.key)
-		if err != nil {
-			t.Errorf("%s: NewCipher(%d bytes) = %s", test.name, len(test.key), err)
-			continue
-		}
-
-		decrypter := cipher.NewCBCDecrypter(c, test.iv)
-
-		data := make([]byte, len(test.out))
-		copy(data, test.out)
-
-		decrypter.CryptBlocks(data, data)
-		if !bytes.Equal(test.in, data) {
-			t.Errorf("%s: CBCDecrypter\nhave %x\nwant %x", test.name, data, test.in)
-		}
-	}
-}
diff --git a/src/pkg/crypto/cipher/cfb.go b/src/pkg/crypto/cipher/cfb.go
deleted file mode 100644
index 9b4eebf5b..000000000
--- a/src/pkg/crypto/cipher/cfb.go
+++ /dev/null
@@ -1,72 +0,0 @@
-// 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.
-
-// CFB (Cipher Feedback) Mode.
-
-package cipher
-
-type cfb struct {
-	b       Block
-	next    []byte
-	out     []byte
-	outUsed int
-
-	decrypt bool
-}
-
-func (x *cfb) XORKeyStream(dst, src []byte) {
-	for len(src) > 0 {
-		if x.outUsed == len(x.out) {
-			x.b.Encrypt(x.out, x.next)
-			x.outUsed = 0
-		}
-
-		if x.decrypt {
-			// We can precompute a larger segment of the
-			// keystream on decryption. This will allow
-			// larger batches for xor, and we should be
-			// able to match CTR/OFB performance.
-			copy(x.next[x.outUsed:], src)
-		}
-		n := xorBytes(dst, src, x.out[x.outUsed:])
-		if !x.decrypt {
-			copy(x.next[x.outUsed:], dst)
-		}
-		dst = dst[n:]
-		src = src[n:]
-		x.outUsed += n
-	}
-}
-
-// NewCFBEncrypter returns a Stream which encrypts with cipher feedback mode,
-// using the given Block. The iv must be the same length as the Block's block
-// size.
-func NewCFBEncrypter(block Block, iv []byte) Stream {
-	return newCFB(block, iv, false)
-}
-
-// NewCFBDecrypter returns a Stream which decrypts with cipher feedback mode,
-// using the given Block. The iv must be the same length as the Block's block
-// size.
-func NewCFBDecrypter(block Block, iv []byte) Stream {
-	return newCFB(block, iv, true)
-}
-
-func newCFB(block Block, iv []byte, decrypt bool) Stream {
-	blockSize := block.BlockSize()
-	if len(iv) != blockSize {
-		// stack trace will indicate whether it was de or encryption
-		panic("cipher.newCFB: IV length must equal block size")
-	}
-	x := &cfb{
-		b:       block,
-		out:     make([]byte, blockSize),
-		next:    make([]byte, blockSize),
-		outUsed: blockSize,
-		decrypt: decrypt,
-	}
-	copy(x.next, iv)
-
-	return x
-}
diff --git a/src/pkg/crypto/cipher/cfb_test.go b/src/pkg/crypto/cipher/cfb_test.go
deleted file mode 100644
index ec708ab2b..000000000
--- a/src/pkg/crypto/cipher/cfb_test.go
+++ /dev/null
@@ -1,38 +0,0 @@
-// 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.
-
-package cipher_test
-
-import (
-	"bytes"
-	"crypto/aes"
-	"crypto/cipher"
-	"crypto/rand"
-	"testing"
-)
-
-func TestCFB(t *testing.T) {
-	block, err := aes.NewCipher(commonKey128)
-	if err != nil {
-		t.Error(err)
-		return
-	}
-
-	plaintext := []byte("this is the plaintext. this is the plaintext.")
-	iv := make([]byte, block.BlockSize())
-	rand.Reader.Read(iv)
-	cfb := cipher.NewCFBEncrypter(block, iv)
-	ciphertext := make([]byte, len(plaintext))
-	copy(ciphertext, plaintext)
-	cfb.XORKeyStream(ciphertext, ciphertext)
-
-	cfbdec := cipher.NewCFBDecrypter(block, iv)
-	plaintextCopy := make([]byte, len(plaintext))
-	copy(plaintextCopy, ciphertext)
-	cfbdec.XORKeyStream(plaintextCopy, plaintextCopy)
-
-	if !bytes.Equal(plaintextCopy, plaintext) {
-		t.Errorf("got: %x, want: %x", plaintextCopy, plaintext)
-	}
-}
diff --git a/src/pkg/crypto/cipher/cipher.go b/src/pkg/crypto/cipher/cipher.go
deleted file mode 100644
index 67afdb1e0..000000000
--- a/src/pkg/crypto/cipher/cipher.go
+++ /dev/null
@@ -1,53 +0,0 @@
-// 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.
-
-// Package cipher 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 cipher
-
-// A Block 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 Block interface {
-	// BlockSize returns the cipher's block size.
-	BlockSize() int
-
-	// Encrypt encrypts the first block in src into dst.
-	// Dst and src may point at the same memory.
-	Encrypt(dst, src []byte)
-
-	// Decrypt decrypts the first block in src into dst.
-	// Dst and src may point at the same memory.
-	Decrypt(dst, src []byte)
-}
-
-// A Stream represents a stream cipher.
-type Stream interface {
-	// XORKeyStream XORs each byte in the given slice with a byte from the
-	// cipher's key stream. Dst and src may point to the same memory.
-	XORKeyStream(dst, src []byte)
-}
-
-// A BlockMode represents a block cipher running in a block-based mode (CBC,
-// ECB etc).
-type BlockMode interface {
-	// BlockSize returns the mode's block size.
-	BlockSize() int
-
-	// CryptBlocks encrypts or decrypts a number of blocks. The length of
-	// src must be a multiple of the block size. Dst and src may point to
-	// the same memory.
-	CryptBlocks(dst, src []byte)
-}
-
-// Utility routines
-
-func dup(p []byte) []byte {
-	q := make([]byte, len(p))
-	copy(q, p)
-	return q
-}
diff --git a/src/pkg/crypto/cipher/cipher_test.go b/src/pkg/crypto/cipher/cipher_test.go
deleted file mode 100644
index 8da5bce93..000000000
--- a/src/pkg/crypto/cipher/cipher_test.go
+++ /dev/null
@@ -1,36 +0,0 @@
-// Copyright 2013 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 cipher_test
-
-import (
-	"crypto/aes"
-	"crypto/cipher"
-	"testing"
-)
-
-func TestCryptBlocks(t *testing.T) {
-	buf := make([]byte, 16)
-	block, _ := aes.NewCipher(buf)
-
-	mode := cipher.NewCBCDecrypter(block, buf)
-	mustPanic(t, "crypto/cipher: input not full blocks", func() { mode.CryptBlocks(buf, buf[:3]) })
-	mustPanic(t, "crypto/cipher: output smaller than input", func() { mode.CryptBlocks(buf[:3], buf) })
-
-	mode = cipher.NewCBCEncrypter(block, buf)
-	mustPanic(t, "crypto/cipher: input not full blocks", func() { mode.CryptBlocks(buf, buf[:3]) })
-	mustPanic(t, "crypto/cipher: output smaller than input", func() { mode.CryptBlocks(buf[:3], buf) })
-}
-
-func mustPanic(t *testing.T, msg string, f func()) {
-	defer func() {
-		err := recover()
-		if err == nil {
-			t.Errorf("function did not panic, wanted %q", msg)
-		} else if err != msg {
-			t.Errorf("got panic %v, wanted %q", err, msg)
-		}
-	}()
-	f()
-}
diff --git a/src/pkg/crypto/cipher/common_test.go b/src/pkg/crypto/cipher/common_test.go
deleted file mode 100644
index c75c919d1..000000000
--- a/src/pkg/crypto/cipher/common_test.go
+++ /dev/null
@@ -1,28 +0,0 @@
-// 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 cipher_test
-
-// Common values for tests.
-
-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}
diff --git a/src/pkg/crypto/cipher/ctr.go b/src/pkg/crypto/cipher/ctr.go
deleted file mode 100644
index 70ac40f6a..000000000
--- a/src/pkg/crypto/cipher/ctr.go
+++ /dev/null
@@ -1,76 +0,0 @@
-// 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 cipher
-
-type ctr struct {
-	b       Block
-	ctr     []byte
-	out     []byte
-	outUsed int
-}
-
-const streamBufferSize = 512
-
-// NewCTR returns a Stream which encrypts/decrypts using the given Block in
-// counter mode. The length of iv must be the same as the Block's block size.
-func NewCTR(block Block, iv []byte) Stream {
-	if len(iv) != block.BlockSize() {
-		panic("cipher.NewCTR: IV length must equal block size")
-	}
-	bufSize := streamBufferSize
-	if bufSize < block.BlockSize() {
-		bufSize = block.BlockSize()
-	}
-	return &ctr{
-		b:       block,
-		ctr:     dup(iv),
-		out:     make([]byte, 0, bufSize),
-		outUsed: 0,
-	}
-}
-
-func (x *ctr) refill() {
-	remain := len(x.out) - x.outUsed
-	if remain > x.outUsed {
-		return
-	}
-	copy(x.out, x.out[x.outUsed:])
-	x.out = x.out[:cap(x.out)]
-	bs := x.b.BlockSize()
-	for remain < len(x.out)-bs {
-		x.b.Encrypt(x.out[remain:], x.ctr)
-		remain += bs
-
-		// Increment counter
-		for i := len(x.ctr) - 1; i >= 0; i-- {
-			x.ctr[i]++
-			if x.ctr[i] != 0 {
-				break
-			}
-		}
-	}
-	x.out = x.out[:remain]
-	x.outUsed = 0
-}
-
-func (x *ctr) XORKeyStream(dst, src []byte) {
-	for len(src) > 0 {
-		if x.outUsed >= len(x.out)-x.b.BlockSize() {
-			x.refill()
-		}
-		n := xorBytes(dst, src, x.out[x.outUsed:])
-		dst = dst[n:]
-		src = src[n:]
-		x.outUsed += n
-	}
-}
diff --git a/src/pkg/crypto/cipher/ctr_aes_test.go b/src/pkg/crypto/cipher/ctr_aes_test.go
deleted file mode 100644
index d019ae0d0..000000000
--- a/src/pkg/crypto/cipher/ctr_aes_test.go
+++ /dev/null
@@ -1,102 +0,0 @@
-// 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.
-
-// CTR 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. 55-58.
-
-package cipher_test
-
-import (
-	"bytes"
-	"crypto/aes"
-	"crypto/cipher"
-	"testing"
-)
-
-var commonCounter = []byte{0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff}
-
-var ctrAESTests = []struct {
-	name string
-	key  []byte
-	iv   []byte
-	in   []byte
-	out  []byte
-}{
-	// NIST SP 800-38A pp 55-58
-	{
-		"CTR-AES128",
-		commonKey128,
-		commonCounter,
-		commonInput,
-		[]byte{
-			0x87, 0x4d, 0x61, 0x91, 0xb6, 0x20, 0xe3, 0x26, 0x1b, 0xef, 0x68, 0x64, 0x99, 0x0d, 0xb6, 0xce,
-			0x98, 0x06, 0xf6, 0x6b, 0x79, 0x70, 0xfd, 0xff, 0x86, 0x17, 0x18, 0x7b, 0xb9, 0xff, 0xfd, 0xff,
-			0x5a, 0xe4, 0xdf, 0x3e, 0xdb, 0xd5, 0xd3, 0x5e, 0x5b, 0x4f, 0x09, 0x02, 0x0d, 0xb0, 0x3e, 0xab,
-			0x1e, 0x03, 0x1d, 0xda, 0x2f, 0xbe, 0x03, 0xd1, 0x79, 0x21, 0x70, 0xa0, 0xf3, 0x00, 0x9c, 0xee,
-		},
-	},
-	{
-		"CTR-AES192",
-		commonKey192,
-		commonCounter,
-		commonInput,
-		[]byte{
-			0x1a, 0xbc, 0x93, 0x24, 0x17, 0x52, 0x1c, 0xa2, 0x4f, 0x2b, 0x04, 0x59, 0xfe, 0x7e, 0x6e, 0x0b,
-			0x09, 0x03, 0x39, 0xec, 0x0a, 0xa6, 0xfa, 0xef, 0xd5, 0xcc, 0xc2, 0xc6, 0xf4, 0xce, 0x8e, 0x94,
-			0x1e, 0x36, 0xb2, 0x6b, 0xd1, 0xeb, 0xc6, 0x70, 0xd1, 0xbd, 0x1d, 0x66, 0x56, 0x20, 0xab, 0xf7,
-			0x4f, 0x78, 0xa7, 0xf6, 0xd2, 0x98, 0x09, 0x58, 0x5a, 0x97, 0xda, 0xec, 0x58, 0xc6, 0xb0, 0x50,
-		},
-	},
-	{
-		"CTR-AES256",
-		commonKey256,
-		commonCounter,
-		commonInput,
-		[]byte{
-			0x60, 0x1e, 0xc3, 0x13, 0x77, 0x57, 0x89, 0xa5, 0xb7, 0xa7, 0xf5, 0x04, 0xbb, 0xf3, 0xd2, 0x28,
-			0xf4, 0x43, 0xe3, 0xca, 0x4d, 0x62, 0xb5, 0x9a, 0xca, 0x84, 0xe9, 0x90, 0xca, 0xca, 0xf5, 0xc5,
-			0x2b, 0x09, 0x30, 0xda, 0xa2, 0x3d, 0xe9, 0x4c, 0xe8, 0x70, 0x17, 0xba, 0x2d, 0x84, 0x98, 0x8d,
-			0xdf, 0xc9, 0xc5, 0x8d, 0xb6, 0x7a, 0xad, 0xa6, 0x13, 0xc2, 0xdd, 0x08, 0x45, 0x79, 0x41, 0xa6,
-		},
-	},
-}
-
-func TestCTR_AES(t *testing.T) {
-	for _, tt := range ctrAESTests {
-		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 {
-			in := tt.in[0 : len(tt.in)-j]
-			ctr := cipher.NewCTR(c, tt.iv)
-			encrypted := make([]byte, len(in))
-			ctr.XORKeyStream(encrypted, in)
-			if out := tt.out[0:len(in)]; !bytes.Equal(out, encrypted) {
-				t.Errorf("%s/%d: CTR\ninpt %x\nhave %x\nwant %x", test, len(in), in, encrypted, out)
-			}
-		}
-
-		for j := 0; j <= 7; j += 7 {
-			in := tt.out[0 : len(tt.out)-j]
-			ctr := cipher.NewCTR(c, tt.iv)
-			plain := make([]byte, len(in))
-			ctr.XORKeyStream(plain, in)
-			if out := tt.in[0:len(in)]; !bytes.Equal(out, plain) {
-				t.Errorf("%s/%d: CTRReader\nhave %x\nwant %x", test, len(out), plain, out)
-			}
-		}
-
-		if t.Failed() {
-			break
-		}
-	}
-}
diff --git a/src/pkg/crypto/cipher/example_test.go b/src/pkg/crypto/cipher/example_test.go
deleted file mode 100644
index 373f6791b..000000000
--- a/src/pkg/crypto/cipher/example_test.go
+++ /dev/null
@@ -1,283 +0,0 @@
-// Copyright 2012 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 cipher_test
-
-import (
-	"crypto/aes"
-	"crypto/cipher"
-	"crypto/rand"
-	"encoding/hex"
-	"fmt"
-	"io"
-	"os"
-)
-
-func ExampleNewCBCDecrypter() {
-	key := []byte("example key 1234")
-	ciphertext, _ := hex.DecodeString("f363f3ccdcb12bb883abf484ba77d9cd7d32b5baecb3d4b1b3e0e4beffdb3ded")
-
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-
-	// The IV needs to be unique, but not secure. Therefore it's common to
-	// include it at the beginning of the ciphertext.
-	if len(ciphertext) < aes.BlockSize {
-		panic("ciphertext too short")
-	}
-	iv := ciphertext[:aes.BlockSize]
-	ciphertext = ciphertext[aes.BlockSize:]
-
-	// CBC mode always works in whole blocks.
-	if len(ciphertext)%aes.BlockSize != 0 {
-		panic("ciphertext is not a multiple of the block size")
-	}
-
-	mode := cipher.NewCBCDecrypter(block, iv)
-
-	// CryptBlocks can work in-place if the two arguments are the same.
-	mode.CryptBlocks(ciphertext, ciphertext)
-
-	// If the original plaintext lengths are not a multiple of the block
-	// size, padding would have to be added when encrypting, which would be
-	// removed at this point. For an example, see
-	// https://tools.ietf.org/html/rfc5246#section-6.2.3.2. However, it's
-	// critical to note that ciphertexts must be authenticated (i.e. by
-	// using crypto/hmac) before being decrypted in order to avoid creating
-	// a padding oracle.
-
-	fmt.Printf("%s\n", ciphertext)
-	// Output: exampleplaintext
-}
-
-func ExampleNewCBCEncrypter() {
-	key := []byte("example key 1234")
-	plaintext := []byte("exampleplaintext")
-
-	// CBC mode works on blocks so plaintexts may need to be padded to the
-	// next whole block. For an example of such padding, see
-	// https://tools.ietf.org/html/rfc5246#section-6.2.3.2. Here we'll
-	// assume that the plaintext is already of the correct length.
-	if len(plaintext)%aes.BlockSize != 0 {
-		panic("plaintext is not a multiple of the block size")
-	}
-
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-
-	// The IV needs to be unique, but not secure. Therefore it's common to
-	// include it at the beginning of the ciphertext.
-	ciphertext := make([]byte, aes.BlockSize+len(plaintext))
-	iv := ciphertext[:aes.BlockSize]
-	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
-	}
-
-	mode := cipher.NewCBCEncrypter(block, iv)
-	mode.CryptBlocks(ciphertext[aes.BlockSize:], plaintext)
-
-	// It's important to remember that ciphertexts must be authenticated
-	// (i.e. by using crypto/hmac) as well as being encrypted in order to
-	// be secure.
-
-	fmt.Printf("%x\n", ciphertext)
-}
-
-func ExampleNewCFBDecrypter() {
-	key := []byte("example key 1234")
-	ciphertext, _ := hex.DecodeString("22277966616d9bc47177bd02603d08c9a67d5380d0fe8cf3b44438dff7b9")
-
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-
-	// The IV needs to be unique, but not secure. Therefore it's common to
-	// include it at the beginning of the ciphertext.
-	if len(ciphertext) < aes.BlockSize {
-		panic("ciphertext too short")
-	}
-	iv := ciphertext[:aes.BlockSize]
-	ciphertext = ciphertext[aes.BlockSize:]
-
-	stream := cipher.NewCFBDecrypter(block, iv)
-
-	// XORKeyStream can work in-place if the two arguments are the same.
-	stream.XORKeyStream(ciphertext, ciphertext)
-	fmt.Printf("%s", ciphertext)
-	// Output: some plaintext
-}
-
-func ExampleNewCFBEncrypter() {
-	key := []byte("example key 1234")
-	plaintext := []byte("some plaintext")
-
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-
-	// The IV needs to be unique, but not secure. Therefore it's common to
-	// include it at the beginning of the ciphertext.
-	ciphertext := make([]byte, aes.BlockSize+len(plaintext))
-	iv := ciphertext[:aes.BlockSize]
-	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
-	}
-
-	stream := cipher.NewCFBEncrypter(block, iv)
-	stream.XORKeyStream(ciphertext[aes.BlockSize:], plaintext)
-
-	// It's important to remember that ciphertexts must be authenticated
-	// (i.e. by using crypto/hmac) as well as being encrypted in order to
-	// be secure.
-}
-
-func ExampleNewCTR() {
-	key := []byte("example key 1234")
-	plaintext := []byte("some plaintext")
-
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-
-	// The IV needs to be unique, but not secure. Therefore it's common to
-	// include it at the beginning of the ciphertext.
-	ciphertext := make([]byte, aes.BlockSize+len(plaintext))
-	iv := ciphertext[:aes.BlockSize]
-	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
-	}
-
-	stream := cipher.NewCTR(block, iv)
-	stream.XORKeyStream(ciphertext[aes.BlockSize:], plaintext)
-
-	// It's important to remember that ciphertexts must be authenticated
-	// (i.e. by using crypto/hmac) as well as being encrypted in order to
-	// be secure.
-
-	// CTR mode is the same for both encryption and decryption, so we can
-	// also decrypt that ciphertext with NewCTR.
-
-	plaintext2 := make([]byte, len(plaintext))
-	stream = cipher.NewCTR(block, iv)
-	stream.XORKeyStream(plaintext2, ciphertext[aes.BlockSize:])
-
-	fmt.Printf("%s\n", plaintext2)
-	// Output: some plaintext
-}
-
-func ExampleNewOFB() {
-	key := []byte("example key 1234")
-	plaintext := []byte("some plaintext")
-
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-
-	// The IV needs to be unique, but not secure. Therefore it's common to
-	// include it at the beginning of the ciphertext.
-	ciphertext := make([]byte, aes.BlockSize+len(plaintext))
-	iv := ciphertext[:aes.BlockSize]
-	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
-	}
-
-	stream := cipher.NewOFB(block, iv)
-	stream.XORKeyStream(ciphertext[aes.BlockSize:], plaintext)
-
-	// It's important to remember that ciphertexts must be authenticated
-	// (i.e. by using crypto/hmac) as well as being encrypted in order to
-	// be secure.
-
-	// OFB mode is the same for both encryption and decryption, so we can
-	// also decrypt that ciphertext with NewOFB.
-
-	plaintext2 := make([]byte, len(plaintext))
-	stream = cipher.NewOFB(block, iv)
-	stream.XORKeyStream(plaintext2, ciphertext[aes.BlockSize:])
-
-	fmt.Printf("%s\n", plaintext2)
-	// Output: some plaintext
-}
-
-func ExampleStreamReader() {
-	key := []byte("example key 1234")
-
-	inFile, err := os.Open("encrypted-file")
-	if err != nil {
-		panic(err)
-	}
-	defer inFile.Close()
-
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-
-	// If the key is unique for each ciphertext, then it's ok to use a zero
-	// IV.
-	var iv [aes.BlockSize]byte
-	stream := cipher.NewOFB(block, iv[:])
-
-	outFile, err := os.OpenFile("decrypted-file", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
-	if err != nil {
-		panic(err)
-	}
-	defer outFile.Close()
-
-	reader := &cipher.StreamReader{S: stream, R: inFile}
-	// Copy the input file to the output file, decrypting as we go.
-	if _, err := io.Copy(outFile, reader); err != nil {
-		panic(err)
-	}
-
-	// Note that this example is simplistic in that it omits any
-	// authentication of the encrypted data. It you were actually to use
-	// StreamReader in this manner, an attacker could flip arbitrary bits in
-	// the output.
-}
-
-func ExampleStreamWriter() {
-	key := []byte("example key 1234")
-
-	inFile, err := os.Open("plaintext-file")
-	if err != nil {
-		panic(err)
-	}
-	defer inFile.Close()
-
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-
-	// If the key is unique for each ciphertext, then it's ok to use a zero
-	// IV.
-	var iv [aes.BlockSize]byte
-	stream := cipher.NewOFB(block, iv[:])
-
-	outFile, err := os.OpenFile("encrypted-file", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
-	if err != nil {
-		panic(err)
-	}
-	defer outFile.Close()
-
-	writer := &cipher.StreamWriter{S: stream, W: outFile}
-	// Copy the input file to the output file, encrypting as we go.
-	if _, err := io.Copy(writer, inFile); err != nil {
-		panic(err)
-	}
-
-	// Note that this example is simplistic in that it omits any
-	// authentication of the encrypted data. It you were actually to use
-	// StreamReader in this manner, an attacker could flip arbitrary bits in
-	// the decrypted result.
-}
diff --git a/src/pkg/crypto/cipher/gcm.go b/src/pkg/crypto/cipher/gcm.go
deleted file mode 100644
index bdafd85fc..000000000
--- a/src/pkg/crypto/cipher/gcm.go
+++ /dev/null
@@ -1,343 +0,0 @@
-// Copyright 2013 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 cipher
-
-import (
-	"crypto/subtle"
-	"errors"
-)
-
-// AEAD is a cipher mode providing authenticated encryption with associated
-// data.
-type AEAD interface {
-	// NonceSize returns the size of the nonce that must be passed to Seal
-	// and Open.
-	NonceSize() int
-
-	// Overhead returns the maximum difference between the lengths of a
-	// plaintext and ciphertext.
-	Overhead() int
-
-	// Seal encrypts and authenticates plaintext, authenticates the
-	// additional data and appends the result to dst, returning the updated
-	// slice. The nonce must be NonceSize() bytes long and unique for all
-	// time, for a given key.
-	//
-	// The plaintext and dst may alias exactly or not at all.
-	Seal(dst, nonce, plaintext, data []byte) []byte
-
-	// Open decrypts and authenticates ciphertext, authenticates the
-	// additional data and, if successful, appends the resulting plaintext
-	// to dst, returning the updated slice. The nonce must be NonceSize()
-	// bytes long and both it and the additional data must match the
-	// value passed to Seal.
-	//
-	// The ciphertext and dst may alias exactly or not at all.
-	Open(dst, nonce, ciphertext, data []byte) ([]byte, error)
-}
-
-// gcmFieldElement represents a value in GF(2¹²⁸). In order to reflect the GCM
-// standard and make getUint64 suitable for marshaling these values, the bits
-// are stored backwards. For example:
-//   the coefficient of x⁰ can be obtained by v.low >> 63.
-//   the coefficient of x⁶³ can be obtained by v.low & 1.
-//   the coefficient of x⁶⁴ can be obtained by v.high >> 63.
-//   the coefficient of x¹²⁷ can be obtained by v.high & 1.
-type gcmFieldElement struct {
-	low, high uint64
-}
-
-// gcm represents a Galois Counter Mode with a specific key. See
-// http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/proposedmodes/gcm/gcm-revised-spec.pdf
-type gcm struct {
-	cipher Block
-	// productTable contains the first sixteen powers of the key, H.
-	// However, they are in bit reversed order. See NewGCM.
-	productTable [16]gcmFieldElement
-}
-
-// NewGCM returns the given 128-bit, block cipher wrapped in Galois Counter Mode.
-func NewGCM(cipher Block) (AEAD, error) {
-	if cipher.BlockSize() != gcmBlockSize {
-		return nil, errors.New("cipher: NewGCM requires 128-bit block cipher")
-	}
-
-	var key [gcmBlockSize]byte
-	cipher.Encrypt(key[:], key[:])
-
-	g := &gcm{cipher: cipher}
-
-	// We precompute 16 multiples of |key|. However, when we do lookups
-	// into this table we'll be using bits from a field element and
-	// therefore the bits will be in the reverse order. So normally one
-	// would expect, say, 4*key to be in index 4 of the table but due to
-	// this bit ordering it will actually be in index 0010 (base 2) = 2.
-	x := gcmFieldElement{
-		getUint64(key[:8]),
-		getUint64(key[8:]),
-	}
-	g.productTable[reverseBits(1)] = x
-
-	for i := 2; i < 16; i += 2 {
-		g.productTable[reverseBits(i)] = gcmDouble(&g.productTable[reverseBits(i/2)])
-		g.productTable[reverseBits(i+1)] = gcmAdd(&g.productTable[reverseBits(i)], &x)
-	}
-
-	return g, nil
-}
-
-const (
-	gcmBlockSize = 16
-	gcmTagSize   = 16
-	gcmNonceSize = 12
-)
-
-func (*gcm) NonceSize() int {
-	return gcmNonceSize
-}
-
-func (*gcm) Overhead() int {
-	return gcmTagSize
-}
-
-func (g *gcm) Seal(dst, nonce, plaintext, data []byte) []byte {
-	if len(nonce) != gcmNonceSize {
-		panic("cipher: incorrect nonce length given to GCM")
-	}
-
-	ret, out := sliceForAppend(dst, len(plaintext)+gcmTagSize)
-
-	// See GCM spec, section 7.1.
-	var counter, tagMask [gcmBlockSize]byte
-	copy(counter[:], nonce)
-	counter[gcmBlockSize-1] = 1
-
-	g.cipher.Encrypt(tagMask[:], counter[:])
-	gcmInc32(&counter)
-
-	g.counterCrypt(out, plaintext, &counter)
-	g.auth(out[len(plaintext):], out[:len(plaintext)], data, &tagMask)
-
-	return ret
-}
-
-var errOpen = errors.New("cipher: message authentication failed")
-
-func (g *gcm) Open(dst, nonce, ciphertext, data []byte) ([]byte, error) {
-	if len(nonce) != gcmNonceSize {
-		panic("cipher: incorrect nonce length given to GCM")
-	}
-
-	if len(ciphertext) < gcmTagSize {
-		return nil, errOpen
-	}
-	tag := ciphertext[len(ciphertext)-gcmTagSize:]
-	ciphertext = ciphertext[:len(ciphertext)-gcmTagSize]
-
-	// See GCM spec, section 7.1.
-	var counter, tagMask [gcmBlockSize]byte
-	copy(counter[:], nonce)
-	counter[gcmBlockSize-1] = 1
-
-	g.cipher.Encrypt(tagMask[:], counter[:])
-	gcmInc32(&counter)
-
-	var expectedTag [gcmTagSize]byte
-	g.auth(expectedTag[:], ciphertext, data, &tagMask)
-
-	if subtle.ConstantTimeCompare(expectedTag[:], tag) != 1 {
-		return nil, errOpen
-	}
-
-	ret, out := sliceForAppend(dst, len(ciphertext))
-	g.counterCrypt(out, ciphertext, &counter)
-
-	return ret, nil
-}
-
-// reverseBits reverses the order of the bits of 4-bit number in i.
-func reverseBits(i int) int {
-	i = ((i << 2) & 0xc) | ((i >> 2) & 0x3)
-	i = ((i << 1) & 0xa) | ((i >> 1) & 0x5)
-	return i
-}
-
-// gcmAdd adds two elements of GF(2¹²⁸) and returns the sum.
-func gcmAdd(x, y *gcmFieldElement) gcmFieldElement {
-	// Addition in a characteristic 2 field is just XOR.
-	return gcmFieldElement{x.low ^ y.low, x.high ^ y.high}
-}
-
-// gcmDouble returns the result of doubling an element of GF(2¹²⁸).
-func gcmDouble(x *gcmFieldElement) (double gcmFieldElement) {
-	msbSet := x.high&1 == 1
-
-	// Because of the bit-ordering, doubling is actually a right shift.
-	double.high = x.high >> 1
-	double.high |= x.low << 63
-	double.low = x.low >> 1
-
-	// If the most-significant bit was set before shifting then it,
-	// conceptually, becomes a term of x^128. This is greater than the
-	// irreducible polynomial so the result has to be reduced. The
-	// irreducible polynomial is 1+x+x^2+x^7+x^128. We can subtract that to
-	// eliminate the term at x^128 which also means subtracting the other
-	// four terms. In characteristic 2 fields, subtraction == addition ==
-	// XOR.
-	if msbSet {
-		double.low ^= 0xe100000000000000
-	}
-
-	return
-}
-
-var gcmReductionTable = []uint16{
-	0x0000, 0x1c20, 0x3840, 0x2460, 0x7080, 0x6ca0, 0x48c0, 0x54e0,
-	0xe100, 0xfd20, 0xd940, 0xc560, 0x9180, 0x8da0, 0xa9c0, 0xb5e0,
-}
-
-// mul sets y to y*H, where H is the GCM key, fixed during NewGCM.
-func (g *gcm) mul(y *gcmFieldElement) {
-	var z gcmFieldElement
-
-	for i := 0; i < 2; i++ {
-		word := y.high
-		if i == 1 {
-			word = y.low
-		}
-
-		// Multiplication works by multiplying z by 16 and adding in
-		// one of the precomputed multiples of H.
-		for j := 0; j < 64; j += 4 {
-			msw := z.high & 0xf
-			z.high >>= 4
-			z.high |= z.low << 60
-			z.low >>= 4
-			z.low ^= uint64(gcmReductionTable[msw]) << 48
-
-			// the values in |table| are ordered for
-			// little-endian bit positions. See the comment
-			// in NewGCM.
-			t := &g.productTable[word&0xf]
-
-			z.low ^= t.low
-			z.high ^= t.high
-			word >>= 4
-		}
-	}
-
-	*y = z
-}
-
-// updateBlocks extends y with more polynomial terms from blocks, based on
-// Horner's rule. There must be a multiple of gcmBlockSize bytes in blocks.
-func (g *gcm) updateBlocks(y *gcmFieldElement, blocks []byte) {
-	for len(blocks) > 0 {
-		y.low ^= getUint64(blocks)
-		y.high ^= getUint64(blocks[8:])
-		g.mul(y)
-		blocks = blocks[gcmBlockSize:]
-	}
-}
-
-// update extends y with more polynomial terms from data. If data is not a
-// multiple of gcmBlockSize bytes long then the remainder is zero padded.
-func (g *gcm) update(y *gcmFieldElement, data []byte) {
-	fullBlocks := (len(data) >> 4) << 4
-	g.updateBlocks(y, data[:fullBlocks])
-
-	if len(data) != fullBlocks {
-		var partialBlock [gcmBlockSize]byte
-		copy(partialBlock[:], data[fullBlocks:])
-		g.updateBlocks(y, partialBlock[:])
-	}
-}
-
-// gcmInc32 treats the final four bytes of counterBlock as a big-endian value
-// and increments it.
-func gcmInc32(counterBlock *[16]byte) {
-	for i := gcmBlockSize - 1; i >= gcmBlockSize-4; i-- {
-		counterBlock[i]++
-		if counterBlock[i] != 0 {
-			break
-		}
-	}
-}
-
-// sliceForAppend takes a slice and a requested number of bytes. It returns a
-// slice with the contents of the given slice followed by that many bytes and a
-// second slice that aliases into it and contains only the extra bytes. If the
-// original slice has sufficient capacity then no allocation is performed.
-func sliceForAppend(in []byte, n int) (head, tail []byte) {
-	if total := len(in) + n; cap(in) >= total {
-		head = in[:total]
-	} else {
-		head = make([]byte, total)
-		copy(head, in)
-	}
-	tail = head[len(in):]
-	return
-}
-
-// counterCrypt crypts in to out using g.cipher in counter mode.
-func (g *gcm) counterCrypt(out, in []byte, counter *[gcmBlockSize]byte) {
-	var mask [gcmBlockSize]byte
-
-	for len(in) >= gcmBlockSize {
-		g.cipher.Encrypt(mask[:], counter[:])
-		gcmInc32(counter)
-
-		xorWords(out, in, mask[:])
-		out = out[gcmBlockSize:]
-		in = in[gcmBlockSize:]
-	}
-
-	if len(in) > 0 {
-		g.cipher.Encrypt(mask[:], counter[:])
-		gcmInc32(counter)
-		xorBytes(out, in, mask[:])
-	}
-}
-
-// auth calculates GHASH(ciphertext, additionalData), masks the result with
-// tagMask and writes the result to out.
-func (g *gcm) auth(out, ciphertext, additionalData []byte, tagMask *[gcmTagSize]byte) {
-	var y gcmFieldElement
-	g.update(&y, additionalData)
-	g.update(&y, ciphertext)
-
-	y.low ^= uint64(len(additionalData)) * 8
-	y.high ^= uint64(len(ciphertext)) * 8
-
-	g.mul(&y)
-
-	putUint64(out, y.low)
-	putUint64(out[8:], y.high)
-
-	xorWords(out, out, tagMask[:])
-}
-
-func getUint64(data []byte) uint64 {
-	r := uint64(data[0])<<56 |
-		uint64(data[1])<<48 |
-		uint64(data[2])<<40 |
-		uint64(data[3])<<32 |
-		uint64(data[4])<<24 |
-		uint64(data[5])<<16 |
-		uint64(data[6])<<8 |
-		uint64(data[7])
-	return r
-}
-
-func putUint64(out []byte, v uint64) {
-	out[0] = byte(v >> 56)
-	out[1] = byte(v >> 48)
-	out[2] = byte(v >> 40)
-	out[3] = byte(v >> 32)
-	out[4] = byte(v >> 24)
-	out[5] = byte(v >> 16)
-	out[6] = byte(v >> 8)
-	out[7] = byte(v)
-}
diff --git a/src/pkg/crypto/cipher/gcm_test.go b/src/pkg/crypto/cipher/gcm_test.go
deleted file mode 100644
index 0c502ce40..000000000
--- a/src/pkg/crypto/cipher/gcm_test.go
+++ /dev/null
@@ -1,159 +0,0 @@
-// Copyright 2013 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 cipher_test
-
-import (
-	"bytes"
-	"crypto/aes"
-	"crypto/cipher"
-	"encoding/hex"
-	"testing"
-)
-
-// AES-GCM test vectors taken from gcmEncryptExtIV128.rsp from
-// http://csrc.nist.gov/groups/STM/cavp/index.html.
-var aesGCMTests = []struct {
-	key, nonce, plaintext, ad, result string
-}{
-	{
-		"11754cd72aec309bf52f7687212e8957",
-		"3c819d9a9bed087615030b65",
-		"",
-		"",
-		"250327c674aaf477aef2675748cf6971",
-	},
-	{
-		"ca47248ac0b6f8372a97ac43508308ed",
-		"ffd2b598feabc9019262d2be",
-		"",
-		"",
-		"60d20404af527d248d893ae495707d1a",
-	},
-	{
-		"77be63708971c4e240d1cb79e8d77feb",
-		"e0e00f19fed7ba0136a797f3",
-		"",
-		"7a43ec1d9c0a5a78a0b16533a6213cab",
-		"209fcc8d3675ed938e9c7166709dd946",
-	},
-	{
-		"7680c5d3ca6154758e510f4d25b98820",
-		"f8f105f9c3df4965780321f8",
-		"",
-		"c94c410194c765e3dcc7964379758ed3",
-		"94dca8edfcf90bb74b153c8d48a17930",
-	},
-	{
-		"7fddb57453c241d03efbed3ac44e371c",
-		"ee283a3fc75575e33efd4887",
-		"d5de42b461646c255c87bd2962d3b9a2",
-		"",
-		"2ccda4a5415cb91e135c2a0f78c9b2fdb36d1df9b9d5e596f83e8b7f52971cb3",
-	},
-	{
-		"ab72c77b97cb5fe9a382d9fe81ffdbed",
-		"54cc7dc2c37ec006bcc6d1da",
-		"007c5e5b3e59df24a7c355584fc1518d",
-		"",
-		"0e1bde206a07a9c2c1b65300f8c649972b4401346697138c7a4891ee59867d0c",
-	},
-	{
-		"fe47fcce5fc32665d2ae399e4eec72ba",
-		"5adb9609dbaeb58cbd6e7275",
-		"7c0e88c88899a779228465074797cd4c2e1498d259b54390b85e3eef1c02df60e743f1b840382c4bccaf3bafb4ca8429bea063",
-		"88319d6e1d3ffa5f987199166c8a9b56c2aeba5a",
-		"98f4826f05a265e6dd2be82db241c0fbbbf9ffb1c173aa83964b7cf5393043736365253ddbc5db8778371495da76d269e5db3e291ef1982e4defedaa2249f898556b47",
-	},
-	{
-		"ec0c2ba17aa95cd6afffe949da9cc3a8",
-		"296bce5b50b7d66096d627ef",
-		"b85b3753535b825cbe5f632c0b843c741351f18aa484281aebec2f45bb9eea2d79d987b764b9611f6c0f8641843d5d58f3a242",
-		"f8d00f05d22bf68599bcdeb131292ad6e2df5d14",
-		"a7443d31c26bdf2a1c945e29ee4bd344a99cfaf3aa71f8b3f191f83c2adfc7a07162995506fde6309ffc19e716eddf1a828c5a890147971946b627c40016da1ecf3e77",
-	},
-	{
-		"2c1f21cf0f6fb3661943155c3e3d8492",
-		"23cb5ff362e22426984d1907",
-		"42f758836986954db44bf37c6ef5e4ac0adaf38f27252a1b82d02ea949c8a1a2dbc0d68b5615ba7c1220ff6510e259f06655d8",
-		"5d3624879d35e46849953e45a32a624d6a6c536ed9857c613b572b0333e701557a713e3f010ecdf9a6bd6c9e3e44b065208645aff4aabee611b391528514170084ccf587177f4488f33cfb5e979e42b6e1cfc0a60238982a7aec",
-		"81824f0e0d523db30d3da369fdc0d60894c7a0a20646dd015073ad2732bd989b14a222b6ad57af43e1895df9dca2a5344a62cc57a3ee28136e94c74838997ae9823f3a",
-	},
-	{
-		"d9f7d2411091f947b4d6f1e2d1f0fb2e",
-		"e1934f5db57cc983e6b180e7",
-		"73ed042327f70fe9c572a61545eda8b2a0c6e1d6c291ef19248e973aee6c312012f490c2c6f6166f4a59431e182663fcaea05a",
-		"0a8a18a7150e940c3d87b38e73baee9a5c049ee21795663e264b694a949822b639092d0e67015e86363583fcf0ca645af9f43375f05fdb4ce84f411dcbca73c2220dea03a20115d2e51398344b16bee1ed7c499b353d6c597af8",
-		"aaadbd5c92e9151ce3db7210b8714126b73e43436d242677afa50384f2149b831f1d573c7891c2a91fbc48db29967ec9542b2321b51ca862cb637cdd03b99a0f93b134",
-	},
-	{
-		"fe9bb47deb3a61e423c2231841cfd1fb",
-		"4d328eb776f500a2f7fb47aa",
-		"f1cc3818e421876bb6b8bbd6c9",
-		"",
-		"b88c5c1977b35b517b0aeae96743fd4727fe5cdb4b5b42818dea7ef8c9",
-	},
-	{
-		"6703df3701a7f54911ca72e24dca046a",
-		"12823ab601c350ea4bc2488c",
-		"793cd125b0b84a043e3ac67717",
-		"",
-		"b2051c80014f42f08735a7b0cd38e6bcd29962e5f2c13626b85a877101",
-	},
-}
-
-func TestAESGCM(t *testing.T) {
-	for i, test := range aesGCMTests {
-		key, _ := hex.DecodeString(test.key)
-		aes, err := aes.NewCipher(key)
-		if err != nil {
-			t.Fatal(err)
-		}
-
-		nonce, _ := hex.DecodeString(test.nonce)
-		plaintext, _ := hex.DecodeString(test.plaintext)
-		ad, _ := hex.DecodeString(test.ad)
-		aesgcm, err := cipher.NewGCM(aes)
-		if err != nil {
-			t.Fatal(err)
-		}
-
-		ct := aesgcm.Seal(nil, nonce, plaintext, ad)
-		if ctHex := hex.EncodeToString(ct); ctHex != test.result {
-			t.Errorf("#%d: got %s, want %s", i, ctHex, test.result)
-			continue
-		}
-
-		plaintext2, err := aesgcm.Open(nil, nonce, ct, ad)
-		if err != nil {
-			t.Errorf("#%d: Open failed", i)
-			continue
-		}
-
-		if !bytes.Equal(plaintext, plaintext2) {
-			t.Errorf("#%d: plaintext's don't match: got %x vs %x", i, plaintext2, plaintext)
-			continue
-		}
-
-		if len(ad) > 0 {
-			ad[0] ^= 0x80
-			if _, err := aesgcm.Open(nil, nonce, ct, ad); err == nil {
-				t.Errorf("#%d: Open was successful after altering additional data", i)
-			}
-			ad[0] ^= 0x80
-		}
-
-		nonce[0] ^= 0x80
-		if _, err := aesgcm.Open(nil, nonce, ct, ad); err == nil {
-			t.Errorf("#%d: Open was successful after altering nonce", i)
-		}
-		nonce[0] ^= 0x80
-
-		ct[0] ^= 0x80
-		if _, err := aesgcm.Open(nil, nonce, ct, ad); err == nil {
-			t.Errorf("#%d: Open was successful after altering ciphertext", i)
-		}
-		ct[0] ^= 0x80
-	}
-}
diff --git a/src/pkg/crypto/cipher/io.go b/src/pkg/crypto/cipher/io.go
deleted file mode 100644
index 3938c0a4c..000000000
--- a/src/pkg/crypto/cipher/io.go
+++ /dev/null
@@ -1,55 +0,0 @@
-// 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.
-
-package cipher
-
-import "io"
-
-// The Stream* objects are so simple that all their members are public. Users
-// can create them themselves.
-
-// StreamReader wraps a Stream into an io.Reader. It calls XORKeyStream
-// to process each slice of data which passes through.
-type StreamReader struct {
-	S Stream
-	R io.Reader
-}
-
-func (r StreamReader) Read(dst []byte) (n int, err error) {
-	n, err = r.R.Read(dst)
-	r.S.XORKeyStream(dst[:n], dst[:n])
-	return
-}
-
-// StreamWriter wraps a Stream into an io.Writer. It calls XORKeyStream
-// to process each slice of data which passes through. If any Write call
-// returns short then the StreamWriter is out of sync and must be discarded.
-// A StreamWriter has no internal buffering; Close does not need
-// to be called to flush write data.
-type StreamWriter struct {
-	S   Stream
-	W   io.Writer
-	Err error // unused
-}
-
-func (w StreamWriter) Write(src []byte) (n int, err error) {
-	c := make([]byte, len(src))
-	w.S.XORKeyStream(c, src)
-	n, err = w.W.Write(c)
-	if n != len(src) {
-		if err == nil { // should never happen
-			err = io.ErrShortWrite
-		}
-	}
-	return
-}
-
-// Close closes the underlying Writer and returns its Close return value, if the Writer
-// is also an io.Closer. Otherwise it returns nil.
-func (w StreamWriter) Close() error {
-	if c, ok := w.W.(io.Closer); ok {
-		return c.Close()
-	}
-	return nil
-}
diff --git a/src/pkg/crypto/cipher/ofb.go b/src/pkg/crypto/cipher/ofb.go
deleted file mode 100644
index e86ebcb23..000000000
--- a/src/pkg/crypto/cipher/ofb.go
+++ /dev/null
@@ -1,66 +0,0 @@
-// Copyright 2011 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 (Output Feedback) Mode.
-
-package cipher
-
-type ofb struct {
-	b       Block
-	cipher  []byte
-	out     []byte
-	outUsed int
-}
-
-// NewOFB returns a Stream that encrypts or decrypts using the block cipher b
-// in output feedback mode. The initialization vector iv's length must be equal
-// to b's block size.
-func NewOFB(b Block, iv []byte) Stream {
-	blockSize := b.BlockSize()
-	if len(iv) != blockSize {
-		return nil
-	}
-	bufSize := streamBufferSize
-	if bufSize < blockSize {
-		bufSize = blockSize
-	}
-	x := &ofb{
-		b:       b,
-		cipher:  make([]byte, blockSize),
-		out:     make([]byte, 0, bufSize),
-		outUsed: 0,
-	}
-
-	copy(x.cipher, iv)
-	return x
-}
-
-func (x *ofb) refill() {
-	bs := x.b.BlockSize()
-	remain := len(x.out) - x.outUsed
-	if remain > x.outUsed {
-		return
-	}
-	copy(x.out, x.out[x.outUsed:])
-	x.out = x.out[:cap(x.out)]
-	for remain < len(x.out)-bs {
-		x.b.Encrypt(x.cipher, x.cipher)
-		copy(x.out[remain:], x.cipher)
-		remain += bs
-	}
-	x.out = x.out[:remain]
-	x.outUsed = 0
-}
-
-func (x *ofb) XORKeyStream(dst, src []byte) {
-	for len(src) > 0 {
-		if x.outUsed >= len(x.out)-x.b.BlockSize() {
-			x.refill()
-		}
-		n := xorBytes(dst, src, x.out[x.outUsed:])
-		dst = dst[n:]
-		src = src[n:]
-		x.outUsed += n
-	}
-}
diff --git a/src/pkg/crypto/cipher/ofb_test.go b/src/pkg/crypto/cipher/ofb_test.go
deleted file mode 100644
index 8d3c5d3a3..000000000
--- a/src/pkg/crypto/cipher/ofb_test.go
+++ /dev/null
@@ -1,102 +0,0 @@
-// 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 cipher_test
-
-import (
-	"bytes"
-	"crypto/aes"
-	"crypto/cipher"
-	"testing"
-)
-
-type ofbTest struct {
-	name string
-	key  []byte
-	iv   []byte
-	in   []byte
-	out  []byte
-}
-
-var ofbTests = []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(t *testing.T) {
-	for _, tt := range ofbTests {
-		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 {
-			plaintext := tt.in[0 : len(tt.in)-j]
-			ofb := cipher.NewOFB(c, tt.iv)
-			ciphertext := make([]byte, len(plaintext))
-			ofb.XORKeyStream(ciphertext, plaintext)
-			if !bytes.Equal(ciphertext, tt.out[:len(plaintext)]) {
-				t.Errorf("%s/%d: encrypting\ninput % x\nhave % x\nwant % x", test, len(plaintext), plaintext, ciphertext, tt.out)
-			}
-		}
-
-		for j := 0; j <= 5; j += 5 {
-			ciphertext := tt.out[0 : len(tt.in)-j]
-			ofb := cipher.NewOFB(c, tt.iv)
-			plaintext := make([]byte, len(ciphertext))
-			ofb.XORKeyStream(plaintext, ciphertext)
-			if !bytes.Equal(plaintext, tt.in[:len(ciphertext)]) {
-				t.Errorf("%s/%d: decrypting\nhave % x\nwant % x", test, len(ciphertext), plaintext, tt.in)
-			}
-		}
-
-		if t.Failed() {
-			break
-		}
-	}
-}
diff --git a/src/pkg/crypto/cipher/xor.go b/src/pkg/crypto/cipher/xor.go
deleted file mode 100644
index f88dc8914..000000000
--- a/src/pkg/crypto/cipher/xor.go
+++ /dev/null
@@ -1,84 +0,0 @@
-// Copyright 2013 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 cipher
-
-import (
-	"runtime"
-	"unsafe"
-)
-
-const wordSize = int(unsafe.Sizeof(uintptr(0)))
-const supportsUnaligned = runtime.GOARCH == "386" || runtime.GOARCH == "amd64"
-
-// fastXORBytes xors in bulk. It only works on architectures that
-// support unaligned read/writes.
-func fastXORBytes(dst, a, b []byte) int {
-	n := len(a)
-	if len(b) < n {
-		n = len(b)
-	}
-
-	w := n / wordSize
-	if w > 0 {
-		dw := *(*[]uintptr)(unsafe.Pointer(&dst))
-		aw := *(*[]uintptr)(unsafe.Pointer(&a))
-		bw := *(*[]uintptr)(unsafe.Pointer(&b))
-		for i := 0; i < w; i++ {
-			dw[i] = aw[i] ^ bw[i]
-		}
-	}
-
-	for i := (n - n%wordSize); i < n; i++ {
-		dst[i] = a[i] ^ b[i]
-	}
-
-	return n
-}
-
-func safeXORBytes(dst, a, b []byte) int {
-	n := len(a)
-	if len(b) < n {
-		n = len(b)
-	}
-	for i := 0; i < n; i++ {
-		dst[i] = a[i] ^ b[i]
-	}
-	return n
-}
-
-// xorBytes xors the bytes in a and b. The destination is assumed to have enough
-// space. Returns the number of bytes xor'd.
-func xorBytes(dst, a, b []byte) int {
-	if supportsUnaligned {
-		return fastXORBytes(dst, a, b)
-	} else {
-		// TODO(hanwen): if (dst, a, b) have common alignment
-		// we could still try fastXORBytes. It is not clear
-		// how often this happens, and it's only worth it if
-		// the block encryption itself is hardware
-		// accelerated.
-		return safeXORBytes(dst, a, b)
-	}
-}
-
-// fastXORWords XORs multiples of 4 or 8 bytes (depending on architecture.)
-// The arguments are assumed to be of equal length.
-func fastXORWords(dst, a, b []byte) {
-	dw := *(*[]uintptr)(unsafe.Pointer(&dst))
-	aw := *(*[]uintptr)(unsafe.Pointer(&a))
-	bw := *(*[]uintptr)(unsafe.Pointer(&b))
-	n := len(b) / wordSize
-	for i := 0; i < n; i++ {
-		dw[i] = aw[i] ^ bw[i]
-	}
-}
-
-func xorWords(dst, a, b []byte) {
-	if supportsUnaligned {
-		fastXORWords(dst, a, b)
-	} else {
-		safeXORBytes(dst, a, b)
-	}
-}
diff --git a/src/pkg/crypto/cipher/xor_test.go b/src/pkg/crypto/cipher/xor_test.go
deleted file mode 100644
index cc1c9d72d..000000000
--- a/src/pkg/crypto/cipher/xor_test.go
+++ /dev/null
@@ -1,28 +0,0 @@
-// Copyright 2013 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 cipher
-
-import (
-	"bytes"
-	"testing"
-)
-
-func TestXOR(t *testing.T) {
-	for alignP := 0; alignP < 2; alignP++ {
-		for alignQ := 0; alignQ < 2; alignQ++ {
-			for alignD := 0; alignD < 2; alignD++ {
-				p := make([]byte, 1024)[alignP:]
-				q := make([]byte, 1024)[alignQ:]
-				d1 := make([]byte, 1024+alignD)[alignD:]
-				d2 := make([]byte, 1024+alignD)[alignD:]
-				xorBytes(d1, p, q)
-				safeXORBytes(d2, p, q)
-				if bytes.Compare(d1, d2) != 0 {
-					t.Error("not equal")
-				}
-			}
-		}
-	}
-}