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// 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.
package packet
import (
"bytes"
"crypto/rand"
"encoding/hex"
"io"
"io/ioutil"
mathrand "math/rand"
"testing"
)
const maxPassLen = 64
// Tests against RFC vectors
func TestDecryptSymmetricKeyAndEncryptedDataPacket(t *testing.T) {
for _, testCase := range keyAndIpePackets {
// Key
buf := readerFromHex(testCase.packets)
packet, err := Read(buf)
if err != nil {
t.Fatalf("failed to read SymmetricKeyEncrypted: %s", err)
}
ske, ok := packet.(*SymmetricKeyEncrypted)
if !ok {
t.Fatal("didn't find SymmetricKeyEncrypted packet")
}
// Decrypt key
key, cipherFunc, err := ske.Decrypt([]byte(testCase.password))
if err != nil {
t.Fatal(err)
}
packet, err = Read(buf)
if err != nil {
t.Fatalf("failed to read SymmetricallyEncrypted: %s", err)
}
// Decrypt contents
var edp EncryptedDataPacket
switch packet.(type) {
case *SymmetricallyEncrypted:
edp, _ = packet.(*SymmetricallyEncrypted)
case *AEADEncrypted:
edp, _ = packet.(*AEADEncrypted)
default:
t.Fatal("no integrity protected packet")
}
r, err := edp.Decrypt(cipherFunc, key)
if err != nil {
t.Fatal(err)
}
contents, err := ioutil.ReadAll(r)
if err != nil && err != io.EOF && err != io.ErrUnexpectedEOF {
t.Fatal(err)
}
expectedContents, _ := hex.DecodeString(testCase.contents)
if !bytes.Equal(expectedContents, contents) {
t.Errorf("bad contents got:%x want:%x", contents, expectedContents)
}
}
}
func TestSerializeSymmetricKeyEncryptedV5RandomizeSlow(t *testing.T) {
ciphers := map[string] CipherFunction {
"AES128": CipherAES128,
"AES192": CipherAES192,
"AES256": CipherAES256,
}
modes := map[string] AEADMode {
"EAX": AEADModeEAX,
"OCB": AEADModeOCB,
"GCM": AEADModeGCM,
}
for cipherName, cipher := range ciphers {
t.Run(cipherName, func(t *testing.T) {
for modeName, mode := range modes {
t.Run(modeName, func(t *testing.T) {
var buf bytes.Buffer
passphrase := randomKey(mathrand.Intn(maxPassLen))
config := &Config{
DefaultCipher: cipher,
AEADConfig: &AEADConfig{DefaultMode: mode},
}
key, err := SerializeSymmetricKeyEncrypted(&buf, passphrase, config)
p, err := Read(&buf)
if err != nil {
t.Errorf("failed to reparse %s", err)
}
ske, ok := p.(*SymmetricKeyEncrypted)
if !ok {
t.Errorf("parsed a different packet type: %#v", p)
}
parsedKey, _, err := ske.Decrypt(passphrase)
if err != nil {
t.Errorf("failed to decrypt reparsed SKE: %s", err)
}
if !bytes.Equal(key, parsedKey) {
t.Errorf("keys don't match after Decrypt: %x (original) vs %x (parsed)", key, parsedKey)
}
})
}
})
}
}
func TestSerializeSymmetricKeyEncryptedCiphersV4(t *testing.T) {
tests := map[string] CipherFunction {
"3DES": Cipher3DES,
"CAST5": CipherCAST5,
"AES128": CipherAES128,
"AES192": CipherAES192,
"AES256": CipherAES256,
}
for cipherName, cipher := range tests {
t.Run(cipherName, func(t *testing.T) {
var buf bytes.Buffer
passphrase := make([]byte, mathrand.Intn(maxPassLen))
if _, err := rand.Read(passphrase); err != nil {
panic(err)
}
config := &Config{
DefaultCipher: cipher,
}
key, err := SerializeSymmetricKeyEncrypted(&buf, passphrase, config)
if err != nil {
t.Fatalf("failed to serialize: %s", err)
}
p, err := Read(&buf)
if err != nil {
t.Fatalf("failed to reparse: %s", err)
}
ske, ok := p.(*SymmetricKeyEncrypted)
if !ok {
t.Fatalf("parsed a different packet type: %#v", p)
}
if ske.CipherFunc != config.DefaultCipher {
t.Fatalf("SKE cipher function is %d (expected %d)", ske.CipherFunc, config.DefaultCipher)
}
parsedKey, parsedCipherFunc, err := ske.Decrypt(passphrase)
if err != nil {
t.Fatalf("failed to decrypt reparsed SKE: %s", err)
}
if !bytes.Equal(key, parsedKey) {
t.Fatalf("keys don't match after Decrypt: %x (original) vs %x (parsed)", key, parsedKey)
}
if parsedCipherFunc != cipher {
t.Fatalf("cipher function doesn't match after Decrypt: %d (original) vs %d (parsed)",
cipher, parsedCipherFunc)
}
})
}
}
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