x/crypto: Add pkcs12 package for reading pkcs12 data
Package pkcs12 provides some Go implementations of PKCS#12.
This implementation is distilled from https://tools.ietf.org/html/rfc7292 and
referenced documents. It is intented for decoding P12/PFX-stored certificate+key
for use with the crypto/tls package.
Package includes @dgryski's RC2 implementation as a sub package as requested in
https://github.com/golang/go/issues/10621.
Change-Id: I78401241e39cd0099e9082a3a227cf0a3a36e6d1
Reviewed-on: https://go-review.googlesource.com/11986
Reviewed-by: Adam Langley <agl@golang.org>
Run-TryBot: Adam Langley <agl@golang.org>
diff --git a/pkcs12/bmp-string.go b/pkcs12/bmp-string.go
new file mode 100644
index 0000000..284d2a6
--- /dev/null
+++ b/pkcs12/bmp-string.go
@@ -0,0 +1,50 @@
+// Copyright 2015 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 pkcs12
+
+import (
+ "errors"
+ "unicode/utf16"
+)
+
+// bmpString returns s encoded in UCS-2 with a zero terminator.
+func bmpString(s string) ([]byte, error) {
+ // References:
+ // https://tools.ietf.org/html/rfc7292#appendix-B.1
+ // http://en.wikipedia.org/wiki/Plane_(Unicode)#Basic_Multilingual_Plane
+ // - non-BMP characters are encoded in UTF 16 by using a surrogate pair of 16-bit codes
+ // EncodeRune returns 0xfffd if the rune does not need special encoding
+ // - the above RFC provides the info that BMPStrings are NULL terminated.
+
+ ret := make([]byte, 0, 2*len(s)+2)
+
+ for _, r := range s {
+ if t, _ := utf16.EncodeRune(r); t != 0xfffd {
+ return nil, errors.New("pkcs12: string contains characters that cannot be encoded in UCS-2")
+ }
+ ret = append(ret, byte(r/256), byte(r%256))
+ }
+
+ return append(ret, 0, 0), nil
+}
+
+func decodeBMPString(bmpString []byte) (string, error) {
+ if len(bmpString)%2 != 0 {
+ return "", errors.New("pkcs12: odd-length BMP string")
+ }
+
+ // strip terminator if present
+ if l := len(bmpString); l >= 2 && bmpString[l-1] == 0 && bmpString[l-2] == 0 {
+ bmpString = bmpString[:l-2]
+ }
+
+ s := make([]uint16, 0, len(bmpString)/2)
+ for len(bmpString) > 0 {
+ s = append(s, uint16(bmpString[0])<<8+uint16(bmpString[1]))
+ bmpString = bmpString[2:]
+ }
+
+ return string(utf16.Decode(s)), nil
+}
diff --git a/pkcs12/bmp-string_test.go b/pkcs12/bmp-string_test.go
new file mode 100644
index 0000000..7fca55f
--- /dev/null
+++ b/pkcs12/bmp-string_test.go
@@ -0,0 +1,63 @@
+// Copyright 2015 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 pkcs12
+
+import (
+ "bytes"
+ "encoding/hex"
+ "testing"
+)
+
+var bmpStringTests = []struct {
+ in string
+ expectedHex string
+ shouldFail bool
+}{
+ {"", "0000", false},
+ // Example from https://tools.ietf.org/html/rfc7292#appendix-B.
+ {"Beavis", "0042006500610076006900730000", false},
+ // Some characters from the "Letterlike Symbols Unicode block".
+ {"\u2115 - Double-struck N", "21150020002d00200044006f00750062006c0065002d00730074007200750063006b0020004e0000", false},
+ // any character outside the BMP should trigger an error.
+ {"\U0001f000 East wind (Mahjong)", "", true},
+}
+
+func TestBMPString(t *testing.T) {
+ for i, test := range bmpStringTests {
+ expected, err := hex.DecodeString(test.expectedHex)
+ if err != nil {
+ t.Fatalf("#%d: failed to decode expectation", i)
+ }
+
+ out, err := bmpString(test.in)
+ if err == nil && test.shouldFail {
+ t.Errorf("#%d: expected to fail, but produced %x", i, out)
+ continue
+ }
+
+ if err != nil && !test.shouldFail {
+ t.Errorf("#%d: failed unexpectedly: %s", i, err)
+ continue
+ }
+
+ if !test.shouldFail {
+ if !bytes.Equal(out, expected) {
+ t.Errorf("#%d: expected %s, got %x", i, test.expectedHex, out)
+ continue
+ }
+
+ roundTrip, err := decodeBMPString(out)
+ if err != nil {
+ t.Errorf("#%d: decoding output gave an error: %s", i, err)
+ continue
+ }
+
+ if roundTrip != test.in {
+ t.Errorf("#%d: decoding output resulted in %q, but it should have been %q", i, roundTrip, test.in)
+ continue
+ }
+ }
+ }
+}
diff --git a/pkcs12/crypto.go b/pkcs12/crypto.go
new file mode 100644
index 0000000..4bd4470
--- /dev/null
+++ b/pkcs12/crypto.go
@@ -0,0 +1,131 @@
+// Copyright 2015 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 pkcs12
+
+import (
+ "bytes"
+ "crypto/cipher"
+ "crypto/des"
+ "crypto/x509/pkix"
+ "encoding/asn1"
+ "errors"
+
+ "golang.org/x/crypto/pkcs12/internal/rc2"
+)
+
+var (
+ oidPBEWithSHAAnd3KeyTripleDESCBC = asn1.ObjectIdentifier([]int{1, 2, 840, 113549, 1, 12, 1, 3})
+ oidPBEWithSHAAnd40BitRC2CBC = asn1.ObjectIdentifier([]int{1, 2, 840, 113549, 1, 12, 1, 6})
+)
+
+// pbeCipher is an abstraction of a PKCS#12 cipher.
+type pbeCipher interface {
+ // create returns a cipher.Block given a key.
+ create(key []byte) (cipher.Block, error)
+ // deriveKey returns a key derived from the given password and salt.
+ deriveKey(salt, password []byte, iterations int) []byte
+ // deriveKey returns an IV derived from the given password and salt.
+ deriveIV(salt, password []byte, iterations int) []byte
+}
+
+type shaWithTripleDESCBC struct{}
+
+func (shaWithTripleDESCBC) create(key []byte) (cipher.Block, error) {
+ return des.NewTripleDESCipher(key)
+}
+
+func (shaWithTripleDESCBC) deriveKey(salt, password []byte, iterations int) []byte {
+ return pbkdf(sha1Sum, 20, 64, salt, password, iterations, 1, 24)
+}
+
+func (shaWithTripleDESCBC) deriveIV(salt, password []byte, iterations int) []byte {
+ return pbkdf(sha1Sum, 20, 64, salt, password, iterations, 2, 8)
+}
+
+type shaWith40BitRC2CBC struct{}
+
+func (shaWith40BitRC2CBC) create(key []byte) (cipher.Block, error) {
+ return rc2.New(key, len(key)*8)
+}
+
+func (shaWith40BitRC2CBC) deriveKey(salt, password []byte, iterations int) []byte {
+ return pbkdf(sha1Sum, 20, 64, salt, password, iterations, 1, 5)
+}
+
+func (shaWith40BitRC2CBC) deriveIV(salt, password []byte, iterations int) []byte {
+ return pbkdf(sha1Sum, 20, 64, salt, password, iterations, 2, 8)
+}
+
+type pbeParams struct {
+ Salt []byte
+ Iterations int
+}
+
+func pbDecrypterFor(algorithm pkix.AlgorithmIdentifier, password []byte) (cipher.BlockMode, int, error) {
+ var cipherType pbeCipher
+
+ switch {
+ case algorithm.Algorithm.Equal(oidPBEWithSHAAnd3KeyTripleDESCBC):
+ cipherType = shaWithTripleDESCBC{}
+ case algorithm.Algorithm.Equal(oidPBEWithSHAAnd40BitRC2CBC):
+ cipherType = shaWith40BitRC2CBC{}
+ default:
+ return nil, 0, NotImplementedError("algorithm " + algorithm.Algorithm.String() + " is not supported")
+ }
+
+ var params pbeParams
+ if err := unmarshal(algorithm.Parameters.FullBytes, ¶ms); err != nil {
+ return nil, 0, err
+ }
+
+ key := cipherType.deriveKey(params.Salt, password, params.Iterations)
+ iv := cipherType.deriveIV(params.Salt, password, params.Iterations)
+
+ block, err := cipherType.create(key)
+ if err != nil {
+ return nil, 0, err
+ }
+
+ return cipher.NewCBCDecrypter(block, iv), block.BlockSize(), nil
+}
+
+func pbDecrypt(info decryptable, password []byte) (decrypted []byte, err error) {
+ cbc, blockSize, err := pbDecrypterFor(info.Algorithm(), password)
+ if err != nil {
+ return nil, err
+ }
+
+ encrypted := info.Data()
+ if len(encrypted) == 0 {
+ return nil, errors.New("pkcs12: empty encrypted data")
+ }
+ if len(encrypted)%blockSize != 0 {
+ return nil, errors.New("pkcs12: input is not a multiple of the block size")
+ }
+ decrypted = make([]byte, len(encrypted))
+ cbc.CryptBlocks(decrypted, encrypted)
+
+ psLen := int(decrypted[len(decrypted)-1])
+ if psLen == 0 || psLen > blockSize {
+ return nil, ErrDecryption
+ }
+
+ if len(decrypted) < psLen {
+ return nil, ErrDecryption
+ }
+ ps := decrypted[len(decrypted)-psLen:]
+ decrypted = decrypted[:len(decrypted)-psLen]
+ if bytes.Compare(ps, bytes.Repeat([]byte{byte(psLen)}, psLen)) != 0 {
+ return nil, ErrDecryption
+ }
+
+ return
+}
+
+// decryptable abstracts a object that contains ciphertext.
+type decryptable interface {
+ Algorithm() pkix.AlgorithmIdentifier
+ Data() []byte
+}
diff --git a/pkcs12/crypto_test.go b/pkcs12/crypto_test.go
new file mode 100644
index 0000000..eb4dae8
--- /dev/null
+++ b/pkcs12/crypto_test.go
@@ -0,0 +1,125 @@
+// Copyright 2015 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 pkcs12
+
+import (
+ "bytes"
+ "crypto/x509/pkix"
+ "encoding/asn1"
+ "testing"
+)
+
+var sha1WithTripleDES = asn1.ObjectIdentifier([]int{1, 2, 840, 113549, 1, 12, 1, 3})
+
+func TestPbDecrypterFor(t *testing.T) {
+ params, _ := asn1.Marshal(pbeParams{
+ Salt: []byte{1, 2, 3, 4, 5, 6, 7, 8},
+ Iterations: 2048,
+ })
+ alg := pkix.AlgorithmIdentifier{
+ Algorithm: asn1.ObjectIdentifier([]int{1, 2, 3}),
+ Parameters: asn1.RawValue{
+ FullBytes: params,
+ },
+ }
+
+ pass, _ := bmpString("Sesame open")
+
+ _, _, err := pbDecrypterFor(alg, pass)
+ if _, ok := err.(NotImplementedError); !ok {
+ t.Errorf("expected not implemented error, got: %T %s", err, err)
+ }
+
+ alg.Algorithm = sha1WithTripleDES
+ cbc, blockSize, err := pbDecrypterFor(alg, pass)
+ if err != nil {
+ t.Errorf("unexpected error from pbDecrypterFor %v", err)
+ }
+ if blockSize != 8 {
+ t.Errorf("unexpected block size %d, wanted 8", blockSize)
+ }
+
+ plaintext := []byte{1, 2, 3, 4, 5, 6, 7, 8}
+ expectedCiphertext := []byte{185, 73, 135, 249, 137, 1, 122, 247}
+ ciphertext := make([]byte, len(plaintext))
+ cbc.CryptBlocks(ciphertext, plaintext)
+
+ if bytes.Compare(ciphertext, expectedCiphertext) != 0 {
+ t.Errorf("bad ciphertext, got %x but wanted %x", ciphertext, expectedCiphertext)
+ }
+}
+
+var pbDecryptTests = []struct {
+ in []byte
+ expected []byte
+ expectedError error
+}{
+ {
+ []byte("\x33\x73\xf3\x9f\xda\x49\xae\xfc\xa0\x9a\xdf\x5a\x58\xa0\xea\x46"), // 7 padding bytes
+ []byte("A secret!"),
+ nil,
+ },
+ {
+ []byte("\x33\x73\xf3\x9f\xda\x49\xae\xfc\x96\x24\x2f\x71\x7e\x32\x3f\xe7"), // 8 padding bytes
+ []byte("A secret"),
+ nil,
+ },
+ {
+ []byte("\x35\x0c\xc0\x8d\xab\xa9\x5d\x30\x7f\x9a\xec\x6a\xd8\x9b\x9c\xd9"), // 9 padding bytes, incorrect
+ nil,
+ ErrDecryption,
+ },
+ {
+ []byte("\xb2\xf9\x6e\x06\x60\xae\x20\xcf\x08\xa0\x7b\xd9\x6b\x20\xef\x41"), // incorrect padding bytes: [ ... 0x04 0x02 ]
+ nil,
+ ErrDecryption,
+ },
+}
+
+func TestPbDecrypt(t *testing.T) {
+ for i, test := range pbDecryptTests {
+ decryptable := testDecryptable{
+ data: test.in,
+ algorithm: pkix.AlgorithmIdentifier{
+ Algorithm: sha1WithTripleDES,
+ Parameters: pbeParams{
+ Salt: []byte("\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8"),
+ Iterations: 4096,
+ }.RawASN1(),
+ },
+ }
+ password, _ := bmpString("sesame")
+
+ plaintext, err := pbDecrypt(decryptable, password)
+ if err != test.expectedError {
+ t.Errorf("#%d: got error %q, but wanted %q", i, err, test.expectedError)
+ continue
+ }
+
+ if !bytes.Equal(plaintext, test.expected) {
+ t.Errorf("#%d: got %x, but wanted %x", i, plaintext, test.expected)
+ }
+ }
+}
+
+type testDecryptable struct {
+ data []byte
+ algorithm pkix.AlgorithmIdentifier
+}
+
+func (d testDecryptable) Algorithm() pkix.AlgorithmIdentifier { return d.algorithm }
+func (d testDecryptable) Data() []byte { return d.data }
+
+func (params pbeParams) RawASN1() (raw asn1.RawValue) {
+ asn1Bytes, err := asn1.Marshal(params)
+ if err != nil {
+ panic(err)
+ }
+ _, err = asn1.Unmarshal(asn1Bytes, &raw)
+ if err != nil {
+ panic(err)
+ }
+ return
+}
diff --git a/pkcs12/errors.go b/pkcs12/errors.go
new file mode 100644
index 0000000..7377ce6
--- /dev/null
+++ b/pkcs12/errors.go
@@ -0,0 +1,23 @@
+// Copyright 2015 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 pkcs12
+
+import "errors"
+
+var (
+ // ErrDecryption represents a failure to decrypt the input.
+ ErrDecryption = errors.New("pkcs12: decryption error, incorrect padding")
+
+ // ErrIncorrectPassword is returned when an incorrect password is detected.
+ // Usually, P12/PFX data is signed to be able to verify the password.
+ ErrIncorrectPassword = errors.New("pkcs12: decryption password incorrect")
+)
+
+// NotImplementedError indicates that the input is not currently supported.
+type NotImplementedError string
+
+func (e NotImplementedError) Error() string {
+ return "pkcs12: " + string(e)
+}
diff --git a/pkcs12/internal/rc2/bench_test.go b/pkcs12/internal/rc2/bench_test.go
new file mode 100644
index 0000000..3347f33
--- /dev/null
+++ b/pkcs12/internal/rc2/bench_test.go
@@ -0,0 +1,27 @@
+// Copyright 2015 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 rc2
+
+import (
+ "testing"
+)
+
+func BenchmarkEncrypt(b *testing.B) {
+ r, _ := New([]byte{0, 0, 0, 0, 0, 0, 0, 0}, 64)
+ b.ResetTimer()
+ var src [8]byte
+ for i := 0; i < b.N; i++ {
+ r.Encrypt(src[:], src[:])
+ }
+}
+
+func BenchmarkDecrypt(b *testing.B) {
+ r, _ := New([]byte{0, 0, 0, 0, 0, 0, 0, 0}, 64)
+ b.ResetTimer()
+ var src [8]byte
+ for i := 0; i < b.N; i++ {
+ r.Decrypt(src[:], src[:])
+ }
+}
diff --git a/pkcs12/internal/rc2/rc2.go b/pkcs12/internal/rc2/rc2.go
new file mode 100644
index 0000000..8c70902
--- /dev/null
+++ b/pkcs12/internal/rc2/rc2.go
@@ -0,0 +1,274 @@
+// Copyright 2015 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 rc2 implements the RC2 cipher
+/*
+https://www.ietf.org/rfc/rfc2268.txt
+http://people.csail.mit.edu/rivest/pubs/KRRR98.pdf
+
+This code is licensed under the MIT license.
+*/
+package rc2
+
+import (
+ "crypto/cipher"
+ "encoding/binary"
+)
+
+// The rc2 block size in bytes
+const BlockSize = 8
+
+type rc2Cipher struct {
+ k [64]uint16
+}
+
+// New returns a new rc2 cipher with the given key and effective key length t1
+func New(key []byte, t1 int) (cipher.Block, error) {
+ // TODO(dgryski): error checking for key length
+ return &rc2Cipher{
+ k: expandKey(key, t1),
+ }, nil
+}
+
+func (*rc2Cipher) BlockSize() int { return BlockSize }
+
+var piTable = [256]byte{
+ 0xd9, 0x78, 0xf9, 0xc4, 0x19, 0xdd, 0xb5, 0xed, 0x28, 0xe9, 0xfd, 0x79, 0x4a, 0xa0, 0xd8, 0x9d,
+ 0xc6, 0x7e, 0x37, 0x83, 0x2b, 0x76, 0x53, 0x8e, 0x62, 0x4c, 0x64, 0x88, 0x44, 0x8b, 0xfb, 0xa2,
+ 0x17, 0x9a, 0x59, 0xf5, 0x87, 0xb3, 0x4f, 0x13, 0x61, 0x45, 0x6d, 0x8d, 0x09, 0x81, 0x7d, 0x32,
+ 0xbd, 0x8f, 0x40, 0xeb, 0x86, 0xb7, 0x7b, 0x0b, 0xf0, 0x95, 0x21, 0x22, 0x5c, 0x6b, 0x4e, 0x82,
+ 0x54, 0xd6, 0x65, 0x93, 0xce, 0x60, 0xb2, 0x1c, 0x73, 0x56, 0xc0, 0x14, 0xa7, 0x8c, 0xf1, 0xdc,
+ 0x12, 0x75, 0xca, 0x1f, 0x3b, 0xbe, 0xe4, 0xd1, 0x42, 0x3d, 0xd4, 0x30, 0xa3, 0x3c, 0xb6, 0x26,
+ 0x6f, 0xbf, 0x0e, 0xda, 0x46, 0x69, 0x07, 0x57, 0x27, 0xf2, 0x1d, 0x9b, 0xbc, 0x94, 0x43, 0x03,
+ 0xf8, 0x11, 0xc7, 0xf6, 0x90, 0xef, 0x3e, 0xe7, 0x06, 0xc3, 0xd5, 0x2f, 0xc8, 0x66, 0x1e, 0xd7,
+ 0x08, 0xe8, 0xea, 0xde, 0x80, 0x52, 0xee, 0xf7, 0x84, 0xaa, 0x72, 0xac, 0x35, 0x4d, 0x6a, 0x2a,
+ 0x96, 0x1a, 0xd2, 0x71, 0x5a, 0x15, 0x49, 0x74, 0x4b, 0x9f, 0xd0, 0x5e, 0x04, 0x18, 0xa4, 0xec,
+ 0xc2, 0xe0, 0x41, 0x6e, 0x0f, 0x51, 0xcb, 0xcc, 0x24, 0x91, 0xaf, 0x50, 0xa1, 0xf4, 0x70, 0x39,
+ 0x99, 0x7c, 0x3a, 0x85, 0x23, 0xb8, 0xb4, 0x7a, 0xfc, 0x02, 0x36, 0x5b, 0x25, 0x55, 0x97, 0x31,
+ 0x2d, 0x5d, 0xfa, 0x98, 0xe3, 0x8a, 0x92, 0xae, 0x05, 0xdf, 0x29, 0x10, 0x67, 0x6c, 0xba, 0xc9,
+ 0xd3, 0x00, 0xe6, 0xcf, 0xe1, 0x9e, 0xa8, 0x2c, 0x63, 0x16, 0x01, 0x3f, 0x58, 0xe2, 0x89, 0xa9,
+ 0x0d, 0x38, 0x34, 0x1b, 0xab, 0x33, 0xff, 0xb0, 0xbb, 0x48, 0x0c, 0x5f, 0xb9, 0xb1, 0xcd, 0x2e,
+ 0xc5, 0xf3, 0xdb, 0x47, 0xe5, 0xa5, 0x9c, 0x77, 0x0a, 0xa6, 0x20, 0x68, 0xfe, 0x7f, 0xc1, 0xad,
+}
+
+func expandKey(key []byte, t1 int) [64]uint16 {
+
+ l := make([]byte, 128)
+ copy(l, key)
+
+ var t = len(key)
+ var t8 = (t1 + 7) / 8
+ var tm = byte(255 % uint(1<<(8+uint(t1)-8*uint(t8))))
+
+ for i := len(key); i < 128; i++ {
+ l[i] = piTable[l[i-1]+l[uint8(i-t)]]
+ }
+
+ l[128-t8] = piTable[l[128-t8]&tm]
+
+ for i := 127 - t8; i >= 0; i-- {
+ l[i] = piTable[l[i+1]^l[i+t8]]
+ }
+
+ var k [64]uint16
+
+ for i := range k {
+ k[i] = uint16(l[2*i]) + uint16(l[2*i+1])*256
+ }
+
+ return k
+}
+
+func rotl16(x uint16, b uint) uint16 {
+ return (x >> (16 - b)) | (x << b)
+}
+
+func (c *rc2Cipher) Encrypt(dst, src []byte) {
+
+ r0 := binary.LittleEndian.Uint16(src[0:])
+ r1 := binary.LittleEndian.Uint16(src[2:])
+ r2 := binary.LittleEndian.Uint16(src[4:])
+ r3 := binary.LittleEndian.Uint16(src[6:])
+
+ var j int
+
+ for j <= 16 {
+ // mix r0
+ r0 = r0 + c.k[j] + (r3 & r2) + ((^r3) & r1)
+ r0 = rotl16(r0, 1)
+ j++
+
+ // mix r1
+ r1 = r1 + c.k[j] + (r0 & r3) + ((^r0) & r2)
+ r1 = rotl16(r1, 2)
+ j++
+
+ // mix r2
+ r2 = r2 + c.k[j] + (r1 & r0) + ((^r1) & r3)
+ r2 = rotl16(r2, 3)
+ j++
+
+ // mix r3
+ r3 = r3 + c.k[j] + (r2 & r1) + ((^r2) & r0)
+ r3 = rotl16(r3, 5)
+ j++
+
+ }
+
+ r0 = r0 + c.k[r3&63]
+ r1 = r1 + c.k[r0&63]
+ r2 = r2 + c.k[r1&63]
+ r3 = r3 + c.k[r2&63]
+
+ for j <= 40 {
+
+ // mix r0
+ r0 = r0 + c.k[j] + (r3 & r2) + ((^r3) & r1)
+ r0 = rotl16(r0, 1)
+ j++
+
+ // mix r1
+ r1 = r1 + c.k[j] + (r0 & r3) + ((^r0) & r2)
+ r1 = rotl16(r1, 2)
+ j++
+
+ // mix r2
+ r2 = r2 + c.k[j] + (r1 & r0) + ((^r1) & r3)
+ r2 = rotl16(r2, 3)
+ j++
+
+ // mix r3
+ r3 = r3 + c.k[j] + (r2 & r1) + ((^r2) & r0)
+ r3 = rotl16(r3, 5)
+ j++
+
+ }
+
+ r0 = r0 + c.k[r3&63]
+ r1 = r1 + c.k[r0&63]
+ r2 = r2 + c.k[r1&63]
+ r3 = r3 + c.k[r2&63]
+
+ for j <= 60 {
+
+ // mix r0
+ r0 = r0 + c.k[j] + (r3 & r2) + ((^r3) & r1)
+ r0 = rotl16(r0, 1)
+ j++
+
+ // mix r1
+ r1 = r1 + c.k[j] + (r0 & r3) + ((^r0) & r2)
+ r1 = rotl16(r1, 2)
+ j++
+
+ // mix r2
+ r2 = r2 + c.k[j] + (r1 & r0) + ((^r1) & r3)
+ r2 = rotl16(r2, 3)
+ j++
+
+ // mix r3
+ r3 = r3 + c.k[j] + (r2 & r1) + ((^r2) & r0)
+ r3 = rotl16(r3, 5)
+ j++
+ }
+
+ binary.LittleEndian.PutUint16(dst[0:], r0)
+ binary.LittleEndian.PutUint16(dst[2:], r1)
+ binary.LittleEndian.PutUint16(dst[4:], r2)
+ binary.LittleEndian.PutUint16(dst[6:], r3)
+}
+
+func (c *rc2Cipher) Decrypt(dst, src []byte) {
+
+ r0 := binary.LittleEndian.Uint16(src[0:])
+ r1 := binary.LittleEndian.Uint16(src[2:])
+ r2 := binary.LittleEndian.Uint16(src[4:])
+ r3 := binary.LittleEndian.Uint16(src[6:])
+
+ j := 63
+
+ for j >= 44 {
+ // unmix r3
+ r3 = rotl16(r3, 16-5)
+ r3 = r3 - c.k[j] - (r2 & r1) - ((^r2) & r0)
+ j--
+
+ // unmix r2
+ r2 = rotl16(r2, 16-3)
+ r2 = r2 - c.k[j] - (r1 & r0) - ((^r1) & r3)
+ j--
+
+ // unmix r1
+ r1 = rotl16(r1, 16-2)
+ r1 = r1 - c.k[j] - (r0 & r3) - ((^r0) & r2)
+ j--
+
+ // unmix r0
+ r0 = rotl16(r0, 16-1)
+ r0 = r0 - c.k[j] - (r3 & r2) - ((^r3) & r1)
+ j--
+ }
+
+ r3 = r3 - c.k[r2&63]
+ r2 = r2 - c.k[r1&63]
+ r1 = r1 - c.k[r0&63]
+ r0 = r0 - c.k[r3&63]
+
+ for j >= 20 {
+ // unmix r3
+ r3 = rotl16(r3, 16-5)
+ r3 = r3 - c.k[j] - (r2 & r1) - ((^r2) & r0)
+ j--
+
+ // unmix r2
+ r2 = rotl16(r2, 16-3)
+ r2 = r2 - c.k[j] - (r1 & r0) - ((^r1) & r3)
+ j--
+
+ // unmix r1
+ r1 = rotl16(r1, 16-2)
+ r1 = r1 - c.k[j] - (r0 & r3) - ((^r0) & r2)
+ j--
+
+ // unmix r0
+ r0 = rotl16(r0, 16-1)
+ r0 = r0 - c.k[j] - (r3 & r2) - ((^r3) & r1)
+ j--
+
+ }
+
+ r3 = r3 - c.k[r2&63]
+ r2 = r2 - c.k[r1&63]
+ r1 = r1 - c.k[r0&63]
+ r0 = r0 - c.k[r3&63]
+
+ for j >= 0 {
+
+ // unmix r3
+ r3 = rotl16(r3, 16-5)
+ r3 = r3 - c.k[j] - (r2 & r1) - ((^r2) & r0)
+ j--
+
+ // unmix r2
+ r2 = rotl16(r2, 16-3)
+ r2 = r2 - c.k[j] - (r1 & r0) - ((^r1) & r3)
+ j--
+
+ // unmix r1
+ r1 = rotl16(r1, 16-2)
+ r1 = r1 - c.k[j] - (r0 & r3) - ((^r0) & r2)
+ j--
+
+ // unmix r0
+ r0 = rotl16(r0, 16-1)
+ r0 = r0 - c.k[j] - (r3 & r2) - ((^r3) & r1)
+ j--
+
+ }
+
+ binary.LittleEndian.PutUint16(dst[0:], r0)
+ binary.LittleEndian.PutUint16(dst[2:], r1)
+ binary.LittleEndian.PutUint16(dst[4:], r2)
+ binary.LittleEndian.PutUint16(dst[6:], r3)
+}
diff --git a/pkcs12/internal/rc2/rc2_test.go b/pkcs12/internal/rc2/rc2_test.go
new file mode 100644
index 0000000..8a49dfa
--- /dev/null
+++ b/pkcs12/internal/rc2/rc2_test.go
@@ -0,0 +1,93 @@
+// Copyright 2015 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 rc2
+
+import (
+ "bytes"
+ "encoding/hex"
+ "testing"
+)
+
+func TestEncryptDecrypt(t *testing.T) {
+
+ // TODO(dgryski): add the rest of the test vectors from the RFC
+ var tests = []struct {
+ key string
+ plain string
+ cipher string
+ t1 int
+ }{
+ {
+ "0000000000000000",
+ "0000000000000000",
+ "ebb773f993278eff",
+ 63,
+ },
+ {
+ "ffffffffffffffff",
+ "ffffffffffffffff",
+ "278b27e42e2f0d49",
+ 64,
+ },
+ {
+ "3000000000000000",
+ "1000000000000001",
+ "30649edf9be7d2c2",
+ 64,
+ },
+ {
+ "88",
+ "0000000000000000",
+ "61a8a244adacccf0",
+ 64,
+ },
+ {
+ "88bca90e90875a",
+ "0000000000000000",
+ "6ccf4308974c267f",
+ 64,
+ },
+ {
+ "88bca90e90875a7f0f79c384627bafb2",
+ "0000000000000000",
+ "1a807d272bbe5db1",
+ 64,
+ },
+ {
+ "88bca90e90875a7f0f79c384627bafb2",
+ "0000000000000000",
+ "2269552ab0f85ca6",
+ 128,
+ },
+ {
+ "88bca90e90875a7f0f79c384627bafb216f80a6f85920584c42fceb0be255daf1e",
+ "0000000000000000",
+ "5b78d3a43dfff1f1",
+ 129,
+ },
+ }
+
+ for _, tt := range tests {
+ k, _ := hex.DecodeString(tt.key)
+ p, _ := hex.DecodeString(tt.plain)
+ c, _ := hex.DecodeString(tt.cipher)
+
+ b, _ := New(k, tt.t1)
+
+ var dst [8]byte
+
+ b.Encrypt(dst[:], p)
+
+ if !bytes.Equal(dst[:], c) {
+ t.Errorf("encrypt failed: got % 2x wanted % 2x\n", dst, c)
+ }
+
+ b.Decrypt(dst[:], c)
+
+ if !bytes.Equal(dst[:], p) {
+ t.Errorf("decrypt failed: got % 2x wanted % 2x\n", dst, p)
+ }
+ }
+}
diff --git a/pkcs12/mac.go b/pkcs12/mac.go
new file mode 100644
index 0000000..5f38aa7
--- /dev/null
+++ b/pkcs12/mac.go
@@ -0,0 +1,45 @@
+// Copyright 2015 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 pkcs12
+
+import (
+ "crypto/hmac"
+ "crypto/sha1"
+ "crypto/x509/pkix"
+ "encoding/asn1"
+)
+
+type macData struct {
+ Mac digestInfo
+ MacSalt []byte
+ Iterations int `asn1:"optional,default:1"`
+}
+
+// from PKCS#7:
+type digestInfo struct {
+ Algorithm pkix.AlgorithmIdentifier
+ Digest []byte
+}
+
+var (
+ oidSHA1 = asn1.ObjectIdentifier([]int{1, 3, 14, 3, 2, 26})
+)
+
+func verifyMac(macData *macData, message, password []byte) error {
+ if !macData.Mac.Algorithm.Algorithm.Equal(oidSHA1) {
+ return NotImplementedError("unknown digest algorithm: " + macData.Mac.Algorithm.Algorithm.String())
+ }
+
+ key := pbkdf(sha1Sum, 20, 64, macData.MacSalt, password, macData.Iterations, 3, 20)
+
+ mac := hmac.New(sha1.New, key)
+ mac.Write(message)
+ expectedMAC := mac.Sum(nil)
+
+ if !hmac.Equal(macData.Mac.Digest, expectedMAC) {
+ return ErrIncorrectPassword
+ }
+ return nil
+}
diff --git a/pkcs12/mac_test.go b/pkcs12/mac_test.go
new file mode 100644
index 0000000..1ed4ff2
--- /dev/null
+++ b/pkcs12/mac_test.go
@@ -0,0 +1,42 @@
+// Copyright 2015 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 pkcs12
+
+import (
+ "encoding/asn1"
+ "testing"
+)
+
+func TestVerifyMac(t *testing.T) {
+ td := macData{
+ Mac: digestInfo{
+ Digest: []byte{0x18, 0x20, 0x3d, 0xff, 0x1e, 0x16, 0xf4, 0x92, 0xf2, 0xaf, 0xc8, 0x91, 0xa9, 0xba, 0xd6, 0xca, 0x9d, 0xee, 0x51, 0x93},
+ },
+ MacSalt: []byte{1, 2, 3, 4, 5, 6, 7, 8},
+ Iterations: 2048,
+ }
+
+ message := []byte{11, 12, 13, 14, 15}
+ password, _ := bmpString("")
+
+ td.Mac.Algorithm.Algorithm = asn1.ObjectIdentifier([]int{1, 2, 3})
+ err := verifyMac(&td, message, password)
+ if _, ok := err.(NotImplementedError); !ok {
+ t.Errorf("err: %v", err)
+ }
+
+ td.Mac.Algorithm.Algorithm = asn1.ObjectIdentifier([]int{1, 3, 14, 3, 2, 26})
+ err = verifyMac(&td, message, password)
+ if err != ErrIncorrectPassword {
+ t.Errorf("Expected incorrect password, got err: %v", err)
+ }
+
+ password, _ = bmpString("Sesame open")
+ err = verifyMac(&td, message, password)
+ if err != nil {
+ t.Errorf("err: %v", err)
+ }
+
+}
diff --git a/pkcs12/pbkdf.go b/pkcs12/pbkdf.go
new file mode 100644
index 0000000..580cac7
--- /dev/null
+++ b/pkcs12/pbkdf.go
@@ -0,0 +1,155 @@
+// Copyright 2015 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 pkcs12
+
+import (
+ "bytes"
+ "crypto/sha1"
+ "math/big"
+)
+
+var (
+ one = big.NewInt(1)
+)
+
+// sha1Sum returns the SHA-1 hash of in.
+func sha1Sum(in []byte) []byte {
+ sum := sha1.Sum(in)
+ return sum[:]
+}
+
+// fillWithRepeats returns v*ceiling(len(pattern) / v) bytes consisting of
+// repeats of pattern.
+func fillWithRepeats(pattern []byte, v int) []byte {
+ if len(pattern) == 0 {
+ return nil
+ }
+ outputLen := v * ((len(pattern) + v - 1) / v)
+ return bytes.Repeat(pattern, (outputLen+len(pattern)-1)/len(pattern))[:outputLen]
+}
+
+func pbkdf(hash func([]byte) []byte, u, v int, salt, password []byte, r int, ID byte, size int) (key []byte) {
+ // implementation of https://tools.ietf.org/html/rfc7292#appendix-B.2 , RFC text verbatim in comments
+
+ // Let H be a hash function built around a compression function f:
+
+ // Z_2^u x Z_2^v -> Z_2^u
+
+ // (that is, H has a chaining variable and output of length u bits, and
+ // the message input to the compression function of H is v bits). The
+ // values for u and v are as follows:
+
+ // HASH FUNCTION VALUE u VALUE v
+ // MD2, MD5 128 512
+ // SHA-1 160 512
+ // SHA-224 224 512
+ // SHA-256 256 512
+ // SHA-384 384 1024
+ // SHA-512 512 1024
+ // SHA-512/224 224 1024
+ // SHA-512/256 256 1024
+
+ // Furthermore, let r be the iteration count.
+
+ // We assume here that u and v are both multiples of 8, as are the
+ // lengths of the password and salt strings (which we denote by p and s,
+ // respectively) and the number n of pseudorandom bits required. In
+ // addition, u and v are of course non-zero.
+
+ // For information on security considerations for MD5 [19], see [25] and
+ // [1], and on those for MD2, see [18].
+
+ // The following procedure can be used to produce pseudorandom bits for
+ // a particular "purpose" that is identified by a byte called "ID".
+ // This standard specifies 3 different values for the ID byte:
+
+ // 1. If ID=1, then the pseudorandom bits being produced are to be used
+ // as key material for performing encryption or decryption.
+
+ // 2. If ID=2, then the pseudorandom bits being produced are to be used
+ // as an IV (Initial Value) for encryption or decryption.
+
+ // 3. If ID=3, then the pseudorandom bits being produced are to be used
+ // as an integrity key for MACing.
+
+ // 1. Construct a string, D (the "diversifier"), by concatenating v/8
+ // copies of ID.
+ var D []byte
+ for i := 0; i < v; i++ {
+ D = append(D, ID)
+ }
+
+ // 2. Concatenate copies of the salt together to create a string S of
+ // length v(ceiling(s/v)) bits (the final copy of the salt may be
+ // truncated to create S). Note that if the salt is the empty
+ // string, then so is S.
+
+ S := fillWithRepeats(salt, v)
+
+ // 3. Concatenate copies of the password together to create a string P
+ // of length v(ceiling(p/v)) bits (the final copy of the password
+ // may be truncated to create P). Note that if the password is the
+ // empty string, then so is P.
+
+ P := fillWithRepeats(password, v)
+
+ // 4. Set I=S||P to be the concatenation of S and P.
+ I := append(S, P...)
+
+ // 5. Set c=ceiling(n/u).
+ c := (size + u - 1) / u
+
+ // 6. For i=1, 2, ..., c, do the following:
+ A := make([]byte, c*20)
+ for i := 0; i < c; i++ {
+ // A. Set A2=H^r(D||I). (i.e., the r-th hash of D||1,
+ // H(H(H(... H(D||I))))
+ Ai := hash(append(D, I...))
+ for j := 1; j < r; j++ {
+ Ai = hash(Ai)
+ }
+ copy(A[i*20:], Ai[:])
+
+ if i < c-1 { // skip on last iteration
+ // B. Concatenate copies of Ai to create a string B of length v
+ // bits (the final copy of Ai may be truncated to create B).
+ var B []byte
+ for len(B) < v {
+ B = append(B, Ai[:]...)
+ }
+ B = B[:v]
+
+ // C. Treating I as a concatenation I_0, I_1, ..., I_(k-1) of v-bit
+ // blocks, where k=ceiling(s/v)+ceiling(p/v), modify I by
+ // setting I_j=(I_j+B+1) mod 2^v for each j.
+ {
+ Bbi := new(big.Int).SetBytes(B)
+ Ij := new(big.Int)
+
+ for j := 0; j < len(I)/v; j++ {
+ Ij.SetBytes(I[j*v : (j+1)*v])
+ Ij.Add(Ij, Bbi)
+ Ij.Add(Ij, one)
+ Ijb := Ij.Bytes()
+ if len(Ijb) > v {
+ Ijb = Ijb[len(Ijb)-v:]
+ }
+ copy(I[j*v:(j+1)*v], Ijb)
+ }
+ }
+ }
+ }
+ // 7. Concatenate A_1, A_2, ..., A_c together to form a pseudorandom
+ // bit string, A.
+
+ // 8. Use the first n bits of A as the output of this entire process.
+ return A[:size]
+
+ // If the above process is being used to generate a DES key, the process
+ // should be used to create 64 random bits, and the key's parity bits
+ // should be set after the 64 bits have been produced. Similar concerns
+ // hold for 2-key and 3-key triple-DES keys, for CDMF keys, and for any
+ // similar keys with parity bits "built into them".
+}
diff --git a/pkcs12/pbkdf_test.go b/pkcs12/pbkdf_test.go
new file mode 100644
index 0000000..1197859
--- /dev/null
+++ b/pkcs12/pbkdf_test.go
@@ -0,0 +1,22 @@
+// Copyright 2015 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 pkcs12
+
+import (
+ "bytes"
+ "testing"
+)
+
+func TestThatPBKDFWorksCorrectlyForLongKeys(t *testing.T) {
+ cipherInfo := shaWithTripleDESCBC{}
+
+ salt := []byte("\xff\xff\xff\xff\xff\xff\xff\xff")
+ password, _ := bmpString("sesame")
+ key := cipherInfo.deriveKey(salt, password, 2048)
+
+ if expected := []byte("\x7c\xd9\xfd\x3e\x2b\x3b\xe7\x69\x1a\x44\xe3\xbe\xf0\xf9\xea\x0f\xb9\xb8\x97\xd4\xe3\x25\xd9\xd1"); bytes.Compare(key, expected) != 0 {
+ t.Fatalf("expected key '%x', but found '%x'", key, expected)
+ }
+}
diff --git a/pkcs12/pkcs12.go b/pkcs12/pkcs12.go
new file mode 100644
index 0000000..e8e1799
--- /dev/null
+++ b/pkcs12/pkcs12.go
@@ -0,0 +1,342 @@
+// Copyright 2015 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 pkcs12 implements some of PKCS#12.
+//
+// This implementation is distilled from https://tools.ietf.org/html/rfc7292
+// and referenced documents. It is intended for decoding P12/PFX-stored
+// certificates and keys for use with the crypto/tls package.
+package pkcs12
+
+import (
+ "crypto/ecdsa"
+ "crypto/rsa"
+ "crypto/x509"
+ "crypto/x509/pkix"
+ "encoding/asn1"
+ "encoding/hex"
+ "encoding/pem"
+ "errors"
+)
+
+var (
+ oidDataContentType = asn1.ObjectIdentifier([]int{1, 2, 840, 113549, 1, 7, 1})
+ oidEncryptedDataContentType = asn1.ObjectIdentifier([]int{1, 2, 840, 113549, 1, 7, 6})
+
+ oidFriendlyName = asn1.ObjectIdentifier([]int{1, 2, 840, 113549, 1, 9, 20})
+ oidLocalKeyID = asn1.ObjectIdentifier([]int{1, 2, 840, 113549, 1, 9, 21})
+ oidMicrosoftCSPName = asn1.ObjectIdentifier([]int{1, 3, 6, 1, 4, 1, 311, 17, 1})
+)
+
+type pfxPdu struct {
+ Version int
+ AuthSafe contentInfo
+ MacData macData `asn1:"optional"`
+}
+
+type contentInfo struct {
+ ContentType asn1.ObjectIdentifier
+ Content asn1.RawValue `asn1:"tag:0,explicit,optional"`
+}
+
+type encryptedData struct {
+ Version int
+ EncryptedContentInfo encryptedContentInfo
+}
+
+type encryptedContentInfo struct {
+ ContentType asn1.ObjectIdentifier
+ ContentEncryptionAlgorithm pkix.AlgorithmIdentifier
+ EncryptedContent []byte `asn1:"tag:0,optional"`
+}
+
+func (i encryptedContentInfo) Algorithm() pkix.AlgorithmIdentifier {
+ return i.ContentEncryptionAlgorithm
+}
+
+func (i encryptedContentInfo) Data() []byte { return i.EncryptedContent }
+
+type safeBag struct {
+ Id asn1.ObjectIdentifier
+ Value asn1.RawValue `asn1:"tag:0,explicit"`
+ Attributes []pkcs12Attribute `asn1:"set,optional"`
+}
+
+type pkcs12Attribute struct {
+ Id asn1.ObjectIdentifier
+ Value asn1.RawValue `ans1:"set"`
+}
+
+type encryptedPrivateKeyInfo struct {
+ AlgorithmIdentifier pkix.AlgorithmIdentifier
+ EncryptedData []byte
+}
+
+func (i encryptedPrivateKeyInfo) Algorithm() pkix.AlgorithmIdentifier {
+ return i.AlgorithmIdentifier
+}
+
+func (i encryptedPrivateKeyInfo) Data() []byte {
+ return i.EncryptedData
+}
+
+// PEM block types
+const (
+ certificateType = "CERTIFICATE"
+ privateKeyType = "PRIVATE KEY"
+)
+
+// unmarshal calls asn1.Unmarshal, but also returns an error if there is any
+// trailing data after unmarshaling.
+func unmarshal(in []byte, out interface{}) error {
+ trailing, err := asn1.Unmarshal(in, out)
+ if err != nil {
+ return err
+ }
+ if len(trailing) != 0 {
+ return errors.New("pkcs12: trailing data found")
+ }
+ return nil
+}
+
+// ConvertToPEM converts all "safe bags" contained in pfxData to PEM blocks.
+func ToPEM(pfxData []byte, password string) ([]*pem.Block, error) {
+ encodedPassword, err := bmpString(password)
+ if err != nil {
+ return nil, ErrIncorrectPassword
+ }
+
+ bags, encodedPassword, err := getSafeContents(pfxData, encodedPassword)
+
+ blocks := make([]*pem.Block, 0, len(bags))
+ for _, bag := range bags {
+ block, err := convertBag(&bag, encodedPassword)
+ if err != nil {
+ return nil, err
+ }
+ blocks = append(blocks, block)
+ }
+
+ return blocks, nil
+}
+
+func convertBag(bag *safeBag, password []byte) (*pem.Block, error) {
+ block := &pem.Block{
+ Headers: make(map[string]string),
+ }
+
+ for _, attribute := range bag.Attributes {
+ k, v, err := convertAttribute(&attribute)
+ if err != nil {
+ return nil, err
+ }
+ block.Headers[k] = v
+ }
+
+ switch {
+ case bag.Id.Equal(oidCertBag):
+ block.Type = certificateType
+ certsData, err := decodeCertBag(bag.Value.Bytes)
+ if err != nil {
+ return nil, err
+ }
+ block.Bytes = certsData
+ case bag.Id.Equal(oidPKCS8ShroundedKeyBag):
+ block.Type = privateKeyType
+
+ key, err := decodePkcs8ShroudedKeyBag(bag.Value.Bytes, password)
+ if err != nil {
+ return nil, err
+ }
+
+ switch key := key.(type) {
+ case *rsa.PrivateKey:
+ block.Bytes = x509.MarshalPKCS1PrivateKey(key)
+ case *ecdsa.PrivateKey:
+ block.Bytes, err = x509.MarshalECPrivateKey(key)
+ if err != nil {
+ return nil, err
+ }
+ default:
+ return nil, errors.New("found unknown private key type in PKCS#8 wrapping")
+ }
+ default:
+ return nil, errors.New("don't know how to convert a safe bag of type " + bag.Id.String())
+ }
+ return block, nil
+}
+
+func convertAttribute(attribute *pkcs12Attribute) (key, value string, err error) {
+ isString := false
+
+ switch {
+ case attribute.Id.Equal(oidFriendlyName):
+ key = "friendlyName"
+ isString = true
+ case attribute.Id.Equal(oidLocalKeyID):
+ key = "localKeyId"
+ case attribute.Id.Equal(oidMicrosoftCSPName):
+ // This key is chosen to match OpenSSL.
+ key = "Microsoft CSP Name"
+ isString = true
+ default:
+ return "", "", errors.New("pkcs12: unknown attribute with OID " + attribute.Id.String())
+ }
+
+ if isString {
+ if err := unmarshal(attribute.Value.Bytes, &attribute.Value); err != nil {
+ return "", "", err
+ }
+ if value, err = decodeBMPString(attribute.Value.Bytes); err != nil {
+ return "", "", err
+ }
+ } else {
+ var id []byte
+ if err := unmarshal(attribute.Value.Bytes, &id); err != nil {
+ return "", "", err
+ }
+ value = hex.EncodeToString(id)
+ }
+
+ return key, value, nil
+}
+
+// Decode extracts a certificate and private key from pfxData. This function
+// assumes that there is only one certificate and only one private key in the
+// pfxData.
+func Decode(pfxData []byte, password string) (privateKey interface{}, certificate *x509.Certificate, err error) {
+ encodedPassword, err := bmpString(password)
+ if err != nil {
+ return nil, nil, err
+ }
+
+ bags, encodedPassword, err := getSafeContents(pfxData, encodedPassword)
+ if err != nil {
+ return nil, nil, err
+ }
+
+ if len(bags) != 2 {
+ err = errors.New("pkcs12: expected exactly two safe bags in the PFX PDU")
+ return
+ }
+
+ for _, bag := range bags {
+ switch {
+ case bag.Id.Equal(oidCertBag):
+ if certificate != nil {
+ err = errors.New("pkcs12: expected exactly one certificate bag")
+ }
+
+ certsData, err := decodeCertBag(bag.Value.Bytes)
+ if err != nil {
+ return nil, nil, err
+ }
+ certs, err := x509.ParseCertificates(certsData)
+ if err != nil {
+ return nil, nil, err
+ }
+ if len(certs) != 1 {
+ err = errors.New("pkcs12: expected exactly one certificate in the certBag")
+ return nil, nil, err
+ }
+ certificate = certs[0]
+
+ case bag.Id.Equal(oidPKCS8ShroundedKeyBag):
+ if privateKey != nil {
+ err = errors.New("pkcs12: expected exactly one key bag")
+ }
+
+ if privateKey, err = decodePkcs8ShroudedKeyBag(bag.Value.Bytes, encodedPassword); err != nil {
+ return nil, nil, err
+ }
+ }
+ }
+
+ if certificate == nil {
+ return nil, nil, errors.New("pkcs12: certificate missing")
+ }
+ if privateKey == nil {
+ return nil, nil, errors.New("pkcs12: private key missing")
+ }
+
+ return
+}
+
+func getSafeContents(p12Data, password []byte) (bags []safeBag, updatedPassword []byte, err error) {
+ pfx := new(pfxPdu)
+ if err := unmarshal(p12Data, pfx); err != nil {
+ return nil, nil, errors.New("pkcs12: error reading P12 data: " + err.Error())
+ }
+
+ if pfx.Version != 3 {
+ return nil, nil, NotImplementedError("can only decode v3 PFX PDU's")
+ }
+
+ if !pfx.AuthSafe.ContentType.Equal(oidDataContentType) {
+ return nil, nil, NotImplementedError("only password-protected PFX is implemented")
+ }
+
+ // unmarshal the explicit bytes in the content for type 'data'
+ if err := unmarshal(pfx.AuthSafe.Content.Bytes, &pfx.AuthSafe.Content); err != nil {
+ return nil, nil, err
+ }
+
+ if len(pfx.MacData.Mac.Algorithm.Algorithm) == 0 {
+ return nil, nil, errors.New("pkcs12: no MAC in data")
+ }
+
+ if err := verifyMac(&pfx.MacData, pfx.AuthSafe.Content.Bytes, password); err != nil {
+ if err == ErrIncorrectPassword && len(password) == 2 && password[0] == 0 && password[1] == 0 {
+ // some implementations use an empty byte array
+ // for the empty string password try one more
+ // time with empty-empty password
+ password = nil
+ err = verifyMac(&pfx.MacData, pfx.AuthSafe.Content.Bytes, password)
+ }
+ if err != nil {
+ return nil, nil, err
+ }
+ }
+
+ var authenticatedSafe []contentInfo
+ if err := unmarshal(pfx.AuthSafe.Content.Bytes, &authenticatedSafe); err != nil {
+ return nil, nil, err
+ }
+
+ if len(authenticatedSafe) != 2 {
+ return nil, nil, NotImplementedError("expected exactly two items in the authenticated safe")
+ }
+
+ for _, ci := range authenticatedSafe {
+ var data []byte
+
+ switch {
+ case ci.ContentType.Equal(oidDataContentType):
+ if err := unmarshal(ci.Content.Bytes, &data); err != nil {
+ return nil, nil, err
+ }
+ case ci.ContentType.Equal(oidEncryptedDataContentType):
+ var encryptedData encryptedData
+ if err := unmarshal(ci.Content.Bytes, &encryptedData); err != nil {
+ return nil, nil, err
+ }
+ if encryptedData.Version != 0 {
+ return nil, nil, NotImplementedError("only version 0 of EncryptedData is supported")
+ }
+ if data, err = pbDecrypt(encryptedData.EncryptedContentInfo, password); err != nil {
+ return nil, nil, err
+ }
+ default:
+ return nil, nil, NotImplementedError("only data and encryptedData content types are supported in authenticated safe")
+ }
+
+ var safeContents []safeBag
+ if err := unmarshal(data, &safeContents); err != nil {
+ return nil, nil, err
+ }
+ bags = append(bags, safeContents...)
+ }
+
+ return bags, password, nil
+}
diff --git a/pkcs12/pkcs12_test.go b/pkcs12/pkcs12_test.go
new file mode 100644
index 0000000..14dd2a6
--- /dev/null
+++ b/pkcs12/pkcs12_test.go
@@ -0,0 +1,138 @@
+// Copyright 2015 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 pkcs12
+
+import (
+ "crypto/rsa"
+ "crypto/tls"
+ "encoding/base64"
+ "encoding/pem"
+ "testing"
+)
+
+func TestPfx(t *testing.T) {
+ for commonName, base64P12 := range testdata {
+ p12, _ := base64.StdEncoding.DecodeString(base64P12)
+
+ priv, cert, err := Decode(p12, "")
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ if err := priv.(*rsa.PrivateKey).Validate(); err != nil {
+ t.Errorf("error while validating private key: %v", err)
+ }
+
+ if cert.Subject.CommonName != commonName {
+ t.Errorf("expected common name to be %q, but found %q", commonName, cert.Subject.CommonName)
+ }
+ }
+}
+
+func TestPEM(t *testing.T) {
+ for commonName, base64P12 := range testdata {
+ p12, _ := base64.StdEncoding.DecodeString(base64P12)
+
+ blocks, err := ToPEM(p12, "")
+ if err != nil {
+ t.Fatalf("error while converting to PEM: %s", err)
+ }
+
+ var pemData []byte
+ for _, b := range blocks {
+ pemData = append(pemData, pem.EncodeToMemory(b)...)
+ }
+
+ cert, err := tls.X509KeyPair(pemData, pemData)
+ if err != nil {
+ t.Errorf("err while converting to key pair: %v", err)
+ }
+ config := tls.Config{
+ Certificates: []tls.Certificate{cert},
+ }
+ config.BuildNameToCertificate()
+
+ if _, exists := config.NameToCertificate[commonName]; !exists {
+ t.Errorf("did not find our cert in PEM?: %v", config.NameToCertificate)
+ }
+ }
+}
+
+func ExampleToPEM() {
+ p12, _ := base64.StdEncoding.DecodeString(`MIIJzgIBAzCCCZQGCS ... CA+gwggPk==`)
+
+ blocks, err := ToPEM(p12, "password")
+ if err != nil {
+ panic(err)
+ }
+
+ var pemData []byte
+ for _, b := range blocks {
+ pemData = append(pemData, pem.EncodeToMemory(b)...)
+ }
+
+ // then use PEM data for tls to construct tls certificate:
+ cert, err := tls.X509KeyPair(pemData, pemData)
+ if err != nil {
+ panic(err)
+ }
+
+ config := &tls.Config{
+ Certificates: []tls.Certificate{cert},
+ }
+
+ _ = config
+}
+
+var testdata = map[string]string{
+ // 'null' password test case
+ "Windows Azure Tools": `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`,
+ // empty string password test case
+ "testing@example.com": `MIIJzgIBAzCCCZQGCSqGSIb3DQEHAaCCCYUEggmBMIIJfTCCA/cGCSqGSIb3DQEHBqCCA+gwggPk
+AgEAMIID3QYJKoZIhvcNAQcBMBwGCiqGSIb3DQEMAQYwDgQIIszfRGqcmPcCAggAgIIDsOZ9Eg1L
+s5Wx8JhYoV3HAL4aRnkAWvTYB5NISZOgSgIQTssmt/3A7134dibTmaT/93LikkL3cTKLnQzJ4wDf
+YZ1bprpVJvUqz+HFT79m27bP9zYXFrvxWBJbxjYKTSjQMgz+h8LAEpXXGajCmxMJ1oCOtdXkhhzc
+LdZN6SAYgtmtyFnCdMEDskSggGuLb3fw84QEJ/Sj6FAULXunW/CPaS7Ce0TMsKmNU/jfFWj3yXXw
+ro0kwjKiVLpVFlnBlHo2OoVU7hmkm59YpGhLgS7nxLD3n7nBroQ0ID1+8R01NnV9XLGoGzxMm1te
+6UyTCkr5mj+kEQ8EP1Ys7g/TC411uhVWySMt/rcpkx7Vz1r9kYEAzJpONAfr6cuEVkPKrxpq4Fh0
+2fzlKBky0i/hrfIEUmngh+ERHUb/Mtv/fkv1j5w9suESbhsMLLiCXAlsP1UWMX+3bNizi3WVMEts
+FM2k9byn+p8IUD/A8ULlE4kEaWeoc+2idkCNQkLGuIdGUXUFVm58se0auUkVRoRJx8x4CkMesT8j
+b1H831W66YRWoEwwDQp2kK1lA2vQXxdVHWlFevMNxJeromLzj3ayiaFrfByeUXhR2S+Hpm+c0yNR
+4UVU9WED2kacsZcpRm9nlEa5sr28mri5JdBrNa/K02OOhvKCxr5ZGmbOVzUQKla2z4w+Ku9k8POm
+dfDNU/fGx1b5hcFWtghXe3msWVsSJrQihnN6q1ughzNiYZlJUGcHdZDRtiWwCFI0bR8h/Dmg9uO9
+4rawQQrjIRT7B8yF3UbkZyAqs8Ppb1TsMeNPHh1rxEfGVQknh/48ouJYsmtbnzugTUt3mJCXXiL+
+XcPMV6bBVAUu4aaVKSmg9+yJtY4/VKv10iw88ktv29fViIdBe3t6l/oPuvQgbQ8dqf4T8w0l/uKZ
+9lS1Na9jfT1vCoS7F5TRi+tmyj1vL5kr/amEIW6xKEP6oeAMvCMtbPAzVEj38zdJ1R22FfuIBxkh
+f0Zl7pdVbmzRxl/SBx9iIBJSqAvcXItiT0FIj8HxQ+0iZKqMQMiBuNWJf5pYOLWGrIyntCWwHuaQ
+wrx0sTGuEL9YXLEAsBDrsvzLkx/56E4INGZFrH8G7HBdW6iGqb22IMI4GHltYSyBRKbB0gadYTyv
+abPEoqww8o7/85aPSzOTJ/53ozD438Q+d0u9SyDuOb60SzCD/zPuCEd78YgtXJwBYTuUNRT27FaM
+3LGMX8Hz+6yPNRnmnA2XKPn7dx/IlaqAjIs8MIIFfgYJKoZIhvcNAQcBoIIFbwSCBWswggVnMIIF
+YwYLKoZIhvcNAQwKAQKgggTuMIIE6jAcBgoqhkiG9w0BDAEDMA4ECJr0cClYqOlcAgIIAASCBMhe
+OQSiP2s0/46ONXcNeVAkz2ksW3u/+qorhSiskGZ0b3dFa1hhgBU2Q7JVIkc4Hf7OXaT1eVQ8oqND
+uhqsNz83/kqYo70+LS8Hocj49jFgWAKrf/yQkdyP1daHa2yzlEw4mkpqOfnIORQHvYCa8nEApspZ
+wVu8y6WVuLHKU67mel7db2xwstQp7PRuSAYqGjTfAylElog8ASdaqqYbYIrCXucF8iF9oVgmb/Qo
+xrXshJ9aSLO4MuXlTPELmWgj07AXKSb90FKNihE+y0bWb9LPVFY1Sly3AX9PfrtkSXIZwqW3phpv
+MxGxQl/R6mr1z+hlTfY9Wdpb5vlKXPKA0L0Rt8d2pOesylFi6esJoS01QgP1kJILjbrV731kvDc0
+Jsd+Oxv4BMwA7ClG8w1EAOInc/GrV1MWFGw/HeEqj3CZ/l/0jv9bwkbVeVCiIhoL6P6lVx9pXq4t
+KZ0uKg/tk5TVJmG2vLcMLvezD0Yk3G2ZOMrywtmskrwoF7oAUpO9e87szoH6fEvUZlkDkPVW1NV4
+cZk3DBSQiuA3VOOg8qbo/tx/EE3H59P0axZWno2GSB0wFPWd1aj+b//tJEJHaaNR6qPRj4IWj9ru
+Qbc8eRAcVWleHg8uAehSvUXlFpyMQREyrnpvMGddpiTC8N4UMrrBRhV7+UbCOWhxPCbItnInBqgl
+1JpSZIP7iUtsIMdu3fEC2cdbXMTRul+4rdzUR7F9OaezV3jjvcAbDvgbK1CpyC+MJ1Mxm/iTgk9V
+iUArydhlR8OniN84GyGYoYCW9O/KUwb6ASmeFOu/msx8x6kAsSQHIkKqMKv0TUR3kZnkxUvdpBGP
+KTl4YCTvNGX4dYALBqrAETRDhua2KVBD/kEttDHwBNVbN2xi81+Mc7ml461aADfk0c66R/m2sjHB
+2tN9+wG12OIWFQjL6wF/UfJMYamxx2zOOExiId29Opt57uYiNVLOO4ourPewHPeH0u8Gz35aero7
+lkt7cZAe1Q0038JUuE/QGlnK4lESK9UkSIQAjSaAlTsrcfwtQxB2EjoOoLhwH5mvxUEmcNGNnXUc
+9xj3M5BD3zBz3Ft7G3YMMDwB1+zC2l+0UG0MGVjMVaeoy32VVNvxgX7jk22OXG1iaOB+PY9kdk+O
+X+52BGSf/rD6X0EnqY7XuRPkMGgjtpZeAYxRQnFtCZgDY4wYheuxqSSpdF49yNczSPLkgB3CeCfS
++9NTKN7aC6hBbmW/8yYh6OvSiCEwY0lFS/T+7iaVxr1loE4zI1y/FFp4Pe1qfLlLttVlkygga2UU
+SCunTQ8UB/M5IXWKkhMOO11dP4niWwb39Y7pCWpau7mwbXOKfRPX96cgHnQJK5uG+BesDD1oYnX0
+6frN7FOnTSHKruRIwuI8KnOQ/I+owmyz71wiv5LMQt+yM47UrEjB/EZa5X8dpEwOZvkdqL7utcyo
+l0XH5kWMXdW856LL/FYftAqJIDAmtX1TXF/rbP6mPyN/IlDC0gjP84Uzd/a2UyTIWr+wk49Ek3vQ
+/uDamq6QrwAxVmNh5Tset5Vhpc1e1kb7mRMZIzxSP8JcTuYd45oFKi98I8YjvueHVZce1g7OudQP
+SbFQoJvdT46iBg1TTatlltpOiH2mFaxWVS0xYjAjBgkqhkiG9w0BCRUxFgQUdA9eVqvETX4an/c8
+p8SsTugkit8wOwYJKoZIhvcNAQkUMS4eLABGAHIAaQBlAG4AZABsAHkAIABuAGEAbQBlACAAZgBv
+AHIAIABjAGUAcgB0MDEwITAJBgUrDgMCGgUABBRFsNz3Zd1O1GI8GTuFwCWuDOjEEwQIuBEfIcAy
+HQ8CAggA`,
+}
diff --git a/pkcs12/safebags.go b/pkcs12/safebags.go
new file mode 100644
index 0000000..def1f7b
--- /dev/null
+++ b/pkcs12/safebags.go
@@ -0,0 +1,57 @@
+// Copyright 2015 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 pkcs12
+
+import (
+ "crypto/x509"
+ "encoding/asn1"
+ "errors"
+)
+
+var (
+ // see https://tools.ietf.org/html/rfc7292#appendix-D
+ oidCertTypeX509Certificate = asn1.ObjectIdentifier([]int{1, 2, 840, 113549, 1, 9, 22, 1})
+ oidPKCS8ShroundedKeyBag = asn1.ObjectIdentifier([]int{1, 2, 840, 113549, 1, 12, 10, 1, 2})
+ oidCertBag = asn1.ObjectIdentifier([]int{1, 2, 840, 113549, 1, 12, 10, 1, 3})
+)
+
+type certBag struct {
+ Id asn1.ObjectIdentifier
+ Data []byte `asn1:"tag:0,explicit"`
+}
+
+func decodePkcs8ShroudedKeyBag(asn1Data, password []byte) (privateKey interface{}, err error) {
+ pkinfo := new(encryptedPrivateKeyInfo)
+ if err = unmarshal(asn1Data, pkinfo); err != nil {
+ return nil, errors.New("pkcs12: error decoding PKCS#8 shrouded key bag: " + err.Error())
+ }
+
+ pkData, err := pbDecrypt(pkinfo, password)
+ if err != nil {
+ return nil, errors.New("pkcs12: error decrypting PKCS#8 shrouded key bag: " + err.Error())
+ }
+
+ ret := new(asn1.RawValue)
+ if err = unmarshal(pkData, ret); err != nil {
+ return nil, errors.New("pkcs12: error unmarshaling decrypted private key: " + err.Error())
+ }
+
+ if privateKey, err = x509.ParsePKCS8PrivateKey(pkData); err != nil {
+ return nil, errors.New("pkcs12: error parsing PKCS#8 private key: " + err.Error())
+ }
+
+ return privateKey, nil
+}
+
+func decodeCertBag(asn1Data []byte) (x509Certificates []byte, err error) {
+ bag := new(certBag)
+ if err := unmarshal(asn1Data, bag); err != nil {
+ return nil, errors.New("pkcs12: error decoding cert bag: " + err.Error())
+ }
+ if !bag.Id.Equal(oidCertTypeX509Certificate) {
+ return nil, NotImplementedError("only X509 certificates are supported")
+ }
+ return bag.Data, nil
+}
