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/*-
* Copyright 2014 Square Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jose
import (
"bytes"
"crypto/cipher"
"crypto/rand"
"crypto/sha256"
"io"
"testing"
"golang.org/x/crypto/pbkdf2"
)
func TestInvalidSymmetricAlgorithms(t *testing.T) {
_, err := newSymmetricRecipient("XYZ", []byte{})
if err != ErrUnsupportedAlgorithm {
t.Error("should not accept invalid algorithm")
}
enc := &symmetricKeyCipher{}
_, err = enc.encryptKey([]byte{}, "XYZ")
if err != ErrUnsupportedAlgorithm {
t.Error("should not accept invalid algorithm")
}
}
func TestAeadErrors(t *testing.T) {
aead := &aeadContentCipher{
keyBytes: 16,
authtagBytes: 16,
getAead: func(key []byte) (cipher.AEAD, error) {
return nil, ErrCryptoFailure
},
}
parts, err := aead.encrypt([]byte{}, []byte{}, []byte{})
if err != ErrCryptoFailure {
t.Error("should handle aead failure")
}
_, err = aead.decrypt([]byte{}, []byte{}, parts)
if err != ErrCryptoFailure {
t.Error("should handle aead failure")
}
}
func TestInvalidKey(t *testing.T) {
gcm := newAESGCM(16).(*aeadContentCipher)
_, err := gcm.getAead([]byte{})
if err == nil {
t.Error("should not accept invalid key")
}
}
func TestStaticKeyGen(t *testing.T) {
key := make([]byte, 32)
io.ReadFull(rand.Reader, key)
gen := &staticKeyGenerator{key: key}
if gen.keySize() != len(key) {
t.Error("static key generator reports incorrect size")
}
generated, _, err := gen.genKey()
if err != nil {
t.Error("static key generator should always succeed", err)
}
if !bytes.Equal(generated, key) {
t.Error("static key generator returns different data")
}
}
func TestAeadInvalidInput(t *testing.T) {
sample := []byte("1234567890123456")
tt := []aeadParts{
{},
{iv: sample, tag: sample},
}
for _, tc := range tt {
aead := newAESGCM(16).(*aeadContentCipher)
_, err := aead.decrypt(sample, []byte{}, &tc)
if err != ErrCryptoFailure {
t.Error("should handle aead failure")
}
}
}
func TestVectorsAESGCM(t *testing.T) {
// Source: http://tools.ietf.org/html/draft-ietf-jose-json-web-encryption-29#appendix-A.1
plaintext := []byte{
84, 104, 101, 32, 116, 114, 117, 101, 32, 115, 105, 103, 110, 32,
111, 102, 32, 105, 110, 116, 101, 108, 108, 105, 103, 101, 110, 99,
101, 32, 105, 115, 32, 110, 111, 116, 32, 107, 110, 111, 119, 108,
101, 100, 103, 101, 32, 98, 117, 116, 32, 105, 109, 97, 103, 105,
110, 97, 116, 105, 111, 110, 46}
aad := []byte{
101, 121, 74, 104, 98, 71, 99, 105, 79, 105, 74, 83, 85, 48, 69,
116, 84, 48, 70, 70, 85, 67, 73, 115, 73, 109, 86, 117, 89, 121, 73,
54, 73, 107, 69, 121, 78, 84, 90, 72, 81, 48, 48, 105, 102, 81}
expectedCiphertext := []byte{
229, 236, 166, 241, 53, 191, 115, 196, 174, 43, 73, 109, 39, 122,
233, 96, 140, 206, 120, 52, 51, 237, 48, 11, 190, 219, 186, 80, 111,
104, 50, 142, 47, 167, 59, 61, 181, 127, 196, 21, 40, 82, 242, 32,
123, 143, 168, 226, 73, 216, 176, 144, 138, 247, 106, 60, 16, 205,
160, 109, 64, 63, 192}
expectedAuthtag := []byte{
92, 80, 104, 49, 133, 25, 161, 215, 173, 101, 219, 211, 136, 91, 210, 145}
// Mock random reader
RandReader = bytes.NewReader([]byte{
177, 161, 244, 128, 84, 143, 225, 115, 63, 180, 3, 255, 107, 154,
212, 246, 138, 7, 110, 91, 112, 46, 34, 105, 47, 130, 203, 46, 122,
234, 64, 252, 227, 197, 117, 252, 2, 219, 233, 68, 180, 225, 77, 219})
defer resetRandReader()
enc := newAESGCM(32)
key, _, _ := randomKeyGenerator{size: 32}.genKey()
out, err := enc.encrypt(key, aad, plaintext)
if err != nil {
t.Error("Unable to encrypt:", err)
return
}
if bytes.Compare(out.ciphertext, expectedCiphertext) != 0 {
t.Error("Ciphertext did not match")
}
if bytes.Compare(out.tag, expectedAuthtag) != 0 {
t.Error("Auth tag did not match")
}
}
func TestVectorPBES2_HS256A_128KW(t *testing.T) {
cipher := &symmetricKeyCipher{
key: []byte("Thus from my lips, by yours, my sin is purged."),
p2c: 4096,
p2s: []byte{
217, 96, 147, 112, 150, 117, 70,
247, 127, 8, 155, 137, 174, 42, 80, 215,
},
}
cek := []byte{
111, 27, 25, 52, 66, 29, 20, 78, 92, 176, 56, 240, 65, 208, 82, 112,
161, 131, 36, 55, 202, 236, 185, 172, 129, 23, 153, 194, 195, 48,
253, 182,
}
// PBES2-HS256+A128KW || 0x00 || p2s
salt := []byte{
80, 66, 69, 83, 50, 45, 72, 83, 50, 53, 54, 43, 65, 49, 50, 56, 75,
87, 0, 217, 96, 147, 112, 150, 117, 70, 247, 127, 8, 155, 137, 174,
42, 80, 215,
}
expectedDerivedKey := []byte{
110, 171, 169, 92, 129, 92, 109, 117, 233, 242, 116, 233, 170, 14,
24, 75}
expectedEncryptedKey := []byte{
78, 186, 151, 59, 11, 141, 81, 240, 213, 245, 83, 211, 53, 188, 134,
188, 66, 125, 36, 200, 222, 124, 5, 103, 249, 52, 117, 184, 140, 81,
246, 158, 161, 177, 20, 33, 245, 57, 59, 4}
derivedKey := pbkdf2.Key(cipher.key, salt, cipher.p2c, 16, sha256.New)
if bytes.Compare(derivedKey, expectedDerivedKey) != 0 {
t.Error("Derived key did not match")
}
encryptedKey, err := cipher.encryptKey(cek, PBES2_HS256_A128KW)
if err != nil {
t.Fatal("Unable to encrypt:", err)
}
if bytes.Compare(encryptedKey.encryptedKey, expectedEncryptedKey) != 0 {
t.Error("Encrypted key did not match")
}
}
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