lnd.xprv/walletunlocker/service_test.go

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package walletunlocker_test
import (
"bytes"
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"context"
"fmt"
"io/ioutil"
"os"
"path"
"testing"
"time"
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"github.com/btcsuite/btcd/chaincfg"
"github.com/btcsuite/btcwallet/snacl"
"github.com/btcsuite/btcwallet/waddrmgr"
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"github.com/btcsuite/btcwallet/wallet"
"github.com/lightningnetwork/lnd/aezeed"
"github.com/lightningnetwork/lnd/channeldb/kvdb"
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"github.com/lightningnetwork/lnd/keychain"
"github.com/lightningnetwork/lnd/lnrpc"
"github.com/lightningnetwork/lnd/lnwallet"
"github.com/lightningnetwork/lnd/lnwallet/btcwallet"
"github.com/lightningnetwork/lnd/macaroons"
"github.com/lightningnetwork/lnd/walletunlocker"
"github.com/stretchr/testify/require"
)
var (
testPassword = []byte("test-password")
testSeed = []byte("test-seed-123456789")
testMac = []byte("fakemacaroon")
testEntropy = [aezeed.EntropySize]byte{
0x81, 0xb6, 0x37, 0xd8,
0x63, 0x59, 0xe6, 0x96,
0x0d, 0xe7, 0x95, 0xe4,
0x1e, 0x0b, 0x4c, 0xfd,
}
testNetParams = &chaincfg.MainNetParams
testRecoveryWindow uint32 = 150
defaultTestTimeout = 3 * time.Second
defaultRootKeyIDContext = macaroons.ContextWithRootKeyID(
context.Background(), macaroons.DefaultRootKeyID,
)
)
func createTestWallet(t *testing.T, dir string, netParams *chaincfg.Params) {
createTestWalletWithPw(t, testPassword, testPassword, dir, netParams)
}
func createTestWalletWithPw(t *testing.T, pubPw, privPw []byte, dir string,
netParams *chaincfg.Params) {
// Instruct waddrmgr to use the cranked down scrypt parameters when
// creating new wallet encryption keys.
fastScrypt := waddrmgr.FastScryptOptions
keyGen := func(passphrase *[]byte, config *waddrmgr.ScryptOptions) (
*snacl.SecretKey, error) {
return snacl.NewSecretKey(
passphrase, fastScrypt.N, fastScrypt.R, fastScrypt.P,
)
}
waddrmgr.SetSecretKeyGen(keyGen)
// Create a new test wallet that uses fast scrypt as KDF.
netDir := btcwallet.NetworkDir(dir, netParams)
loader := wallet.NewLoader(netParams, netDir, true, 0)
_, err := loader.CreateNewWallet(
pubPw, privPw, testSeed, time.Time{},
)
require.NoError(t, err)
err = loader.UnloadWallet()
require.NoError(t, err)
}
func createSeedAndMnemonic(t *testing.T,
pass []byte) (*aezeed.CipherSeed, aezeed.Mnemonic) {
cipherSeed, err := aezeed.New(
keychain.KeyDerivationVersion, &testEntropy, time.Now(),
)
require.NoError(t, err)
// With the new seed created, we'll convert it into a mnemonic phrase
// that we'll send over to initialize the wallet.
mnemonic, err := cipherSeed.ToMnemonic(pass)
require.NoError(t, err)
return cipherSeed, mnemonic
}
// openOrCreateTestMacStore opens or creates a bbolt DB and then initializes a
// root key storage for that DB and then unlocks it, creating a root key in the
// process.
func openOrCreateTestMacStore(tempDir string, pw *[]byte,
netParams *chaincfg.Params) (*macaroons.RootKeyStorage, error) {
netDir := btcwallet.NetworkDir(tempDir, netParams)
err := os.MkdirAll(netDir, 0700)
if err != nil {
return nil, err
}
db, err := kvdb.Create(
kvdb.BoltBackendName, path.Join(netDir, macaroons.DBFilename),
true,
)
if err != nil {
return nil, err
}
store, err := macaroons.NewRootKeyStorage(db)
if err != nil {
_ = db.Close()
return nil, err
}
err = store.CreateUnlock(pw)
if err != nil {
_ = store.Close()
return nil, err
}
_, _, err = store.RootKey(defaultRootKeyIDContext)
if err != nil {
_ = store.Close()
return nil, err
}
return store, nil
}
// TestGenSeedUserEntropy tests that the gen seed method generates a valid
// cipher seed mnemonic phrase and user provided source of entropy.
func TestGenSeed(t *testing.T) {
t.Parallel()
// First, we'll create a new test directory and unlocker service for
// that directory.
testDir, err := ioutil.TempDir("", "testcreate")
require.NoError(t, err)
defer func() {
_ = os.RemoveAll(testDir)
}()
service := walletunlocker.New(testDir, testNetParams, true, nil)
// Now that the service has been created, we'll ask it to generate a
// new seed for us given a test passphrase.
aezeedPass := []byte("kek")
genSeedReq := &lnrpc.GenSeedRequest{
AezeedPassphrase: aezeedPass,
SeedEntropy: testEntropy[:],
}
ctx := context.Background()
seedResp, err := service.GenSeed(ctx, genSeedReq)
require.NoError(t, err)
// We should then be able to take the generated mnemonic, and properly
// decipher both it.
var mnemonic aezeed.Mnemonic
copy(mnemonic[:], seedResp.CipherSeedMnemonic[:])
_, err = mnemonic.ToCipherSeed(aezeedPass)
require.NoError(t, err)
}
// TestGenSeedInvalidEntropy tests that the gen seed method generates a valid
// cipher seed mnemonic pass phrase even when the user doesn't provide its own
// source of entropy.
func TestGenSeedGenerateEntropy(t *testing.T) {
t.Parallel()
// First, we'll create a new test directory and unlocker service for
// that directory.
testDir, err := ioutil.TempDir("", "testcreate")
require.NoError(t, err)
defer func() {
_ = os.RemoveAll(testDir)
}()
service := walletunlocker.New(testDir, testNetParams, true, nil)
// Now that the service has been created, we'll ask it to generate a
// new seed for us given a test passphrase. Note that we don't actually
aezeedPass := []byte("kek")
genSeedReq := &lnrpc.GenSeedRequest{
AezeedPassphrase: aezeedPass,
}
ctx := context.Background()
seedResp, err := service.GenSeed(ctx, genSeedReq)
require.NoError(t, err)
// We should then be able to take the generated mnemonic, and properly
// decipher both it.
var mnemonic aezeed.Mnemonic
copy(mnemonic[:], seedResp.CipherSeedMnemonic[:])
_, err = mnemonic.ToCipherSeed(aezeedPass)
require.NoError(t, err)
}
// TestGenSeedInvalidEntropy tests that if a user attempt to create a seed with
// the wrong number of bytes for the initial entropy, then the proper error is
// returned.
func TestGenSeedInvalidEntropy(t *testing.T) {
t.Parallel()
// First, we'll create a new test directory and unlocker service for
// that directory.
testDir, err := ioutil.TempDir("", "testcreate")
require.NoError(t, err)
defer func() {
_ = os.RemoveAll(testDir)
}()
service := walletunlocker.New(testDir, testNetParams, true, nil)
// Now that the service has been created, we'll ask it to generate a
// new seed for us given a test passphrase. However, we'll be using an
// invalid set of entropy that's 55 bytes, instead of 15 bytes.
aezeedPass := []byte("kek")
genSeedReq := &lnrpc.GenSeedRequest{
AezeedPassphrase: aezeedPass,
SeedEntropy: bytes.Repeat([]byte("a"), 55),
}
// We should get an error now since the entropy source was invalid.
ctx := context.Background()
_, err = service.GenSeed(ctx, genSeedReq)
require.Error(t, err)
require.Contains(t, err.Error(), "incorrect entropy length")
}
// TestInitWallet tests that the user is able to properly initialize the wallet
// given an existing cipher seed passphrase.
func TestInitWallet(t *testing.T) {
t.Parallel()
// testDir is empty, meaning wallet was not created from before.
testDir, err := ioutil.TempDir("", "testcreate")
require.NoError(t, err)
defer func() {
_ = os.RemoveAll(testDir)
}()
// Create new UnlockerService.
service := walletunlocker.New(testDir, testNetParams, true, nil)
// Once we have the unlocker service created, we'll now instantiate a
// new cipher seed and its mnemonic.
pass := []byte("test")
cipherSeed, mnemonic := createSeedAndMnemonic(t, pass)
// Now that we have all the necessary items, we'll now issue the Init
// command to the wallet. This should check the validity of the cipher
// seed, then send over the initialization information over the init
// channel.
ctx := context.Background()
req := &lnrpc.InitWalletRequest{
WalletPassword: testPassword,
CipherSeedMnemonic: mnemonic[:],
AezeedPassphrase: pass,
RecoveryWindow: int32(testRecoveryWindow),
StatelessInit: true,
}
errChan := make(chan error, 1)
go func() {
response, err := service.InitWallet(ctx, req)
if err != nil {
errChan <- err
return
}
if !bytes.Equal(response.AdminMacaroon, testMac) {
errChan <- fmt.Errorf("mismatched macaroon: "+
"expected %x, got %x", testMac,
response.AdminMacaroon)
}
}()
// The same user passphrase, and also the plaintext cipher seed
// should be sent over and match exactly.
select {
case err := <-errChan:
t.Fatalf("InitWallet call failed: %v", err)
case msg := <-service.InitMsgs:
msgSeed := msg.WalletSeed
require.Equal(t, testPassword, msg.Passphrase)
require.Equal(
t, cipherSeed.InternalVersion, msgSeed.InternalVersion,
)
require.Equal(t, cipherSeed.Birthday, msgSeed.Birthday)
require.Equal(t, cipherSeed.Entropy, msgSeed.Entropy)
require.Equal(t, testRecoveryWindow, msg.RecoveryWindow)
require.Equal(t, true, msg.StatelessInit)
// Send a fake macaroon that should be returned in the response
// in the async code above.
service.MacResponseChan <- testMac
case <-time.After(defaultTestTimeout):
t.Fatalf("password not received")
}
// Create a wallet in testDir.
createTestWallet(t, testDir, testNetParams)
// Now calling InitWallet should fail, since a wallet already exists in
// the directory.
_, err = service.InitWallet(ctx, req)
require.Error(t, err)
// Similarly, if we try to do GenSeed again, we should get an error as
// the wallet already exists.
_, err = service.GenSeed(ctx, &lnrpc.GenSeedRequest{})
require.Error(t, err)
}
// TestInitWalletInvalidCipherSeed tests that if we attempt to create a wallet
// with an invalid cipher seed, then we'll receive an error.
func TestCreateWalletInvalidEntropy(t *testing.T) {
t.Parallel()
// testDir is empty, meaning wallet was not created from before.
testDir, err := ioutil.TempDir("", "testcreate")
require.NoError(t, err)
defer func() {
_ = os.RemoveAll(testDir)
}()
// Create new UnlockerService.
service := walletunlocker.New(testDir, testNetParams, true, nil)
// We'll attempt to init the wallet with an invalid cipher seed and
// passphrase.
req := &lnrpc.InitWalletRequest{
WalletPassword: testPassword,
CipherSeedMnemonic: []string{"invalid", "seed"},
AezeedPassphrase: []byte("fake pass"),
}
ctx := context.Background()
_, err = service.InitWallet(ctx, req)
require.Error(t, err)
}
// TestUnlockWallet checks that trying to unlock non-existing wallet fail, that
// unlocking existing wallet with wrong passphrase fails, and that unlocking
// existing wallet with correct passphrase succeeds.
func TestUnlockWallet(t *testing.T) {
t.Parallel()
// testDir is empty, meaning wallet was not created from before.
testDir, err := ioutil.TempDir("", "testunlock")
require.NoError(t, err)
defer func() {
_ = os.RemoveAll(testDir)
}()
// Create new UnlockerService.
service := walletunlocker.New(testDir, testNetParams, true, nil)
ctx := context.Background()
req := &lnrpc.UnlockWalletRequest{
WalletPassword: testPassword,
RecoveryWindow: int32(testRecoveryWindow),
StatelessInit: true,
}
// Should fail to unlock non-existing wallet.
_, err = service.UnlockWallet(ctx, req)
require.Error(t, err)
// Create a wallet we can try to unlock.
createTestWallet(t, testDir, testNetParams)
// Try unlocking this wallet with the wrong passphrase.
wrongReq := &lnrpc.UnlockWalletRequest{
WalletPassword: []byte("wrong-ofc"),
}
_, err = service.UnlockWallet(ctx, wrongReq)
require.Error(t, err)
// With the correct password, we should be able to unlock the wallet.
errChan := make(chan error, 1)
go func() {
// With the correct password, we should be able to unlock the
// wallet.
_, err := service.UnlockWallet(ctx, req)
if err != nil {
errChan <- err
}
}()
// Password and recovery window should be sent over the channel.
select {
case err := <-errChan:
t.Fatalf("UnlockWallet call failed: %v", err)
case unlockMsg := <-service.UnlockMsgs:
require.Equal(t, testPassword, unlockMsg.Passphrase)
require.Equal(t, testRecoveryWindow, unlockMsg.RecoveryWindow)
require.Equal(t, true, unlockMsg.StatelessInit)
// Send a fake macaroon that should be returned in the response
// in the async code above.
service.MacResponseChan <- testMac
case <-time.After(defaultTestTimeout):
t.Fatalf("password not received")
}
}
// TestChangeWalletPasswordNewRootkey tests that we can successfully change the
// wallet's password needed to unlock it and rotate the root key for the
// macaroons in the same process.
func TestChangeWalletPasswordNewRootkey(t *testing.T) {
t.Parallel()
// testDir is empty, meaning wallet was not created from before.
testDir, err := ioutil.TempDir("", "testchangepassword")
require.NoError(t, err)
defer func() {
_ = os.RemoveAll(testDir)
}()
// Changing the password of the wallet will also try to change the
// password of the macaroon DB. We create a default DB here but close it
// immediately so the service does not fail when trying to open it.
store, err := openOrCreateTestMacStore(
testDir, &testPassword, testNetParams,
)
require.NoError(t, err)
require.NoError(t, store.Close())
// Create some files that will act as macaroon files that should be
// deleted after a password change is successful with a new root key
// requested.
var tempFiles []string
for i := 0; i < 3; i++ {
file, err := ioutil.TempFile(testDir, "")
if err != nil {
t.Fatalf("unable to create temp file: %v", err)
}
tempFiles = append(tempFiles, file.Name())
require.NoError(t, file.Close())
}
// Create a new UnlockerService with our temp files.
service := walletunlocker.New(testDir, testNetParams, true, tempFiles)
ctx := context.Background()
newPassword := []byte("hunter2???")
req := &lnrpc.ChangePasswordRequest{
CurrentPassword: testPassword,
NewPassword: newPassword,
NewMacaroonRootKey: true,
}
// Changing the password to a non-existing wallet should fail.
_, err = service.ChangePassword(ctx, req)
require.Error(t, err)
// Create a wallet to test changing the password.
createTestWallet(t, testDir, testNetParams)
// Attempting to change the wallet's password using an incorrect
// current password should fail.
wrongReq := &lnrpc.ChangePasswordRequest{
CurrentPassword: []byte("wrong-ofc"),
NewPassword: newPassword,
}
_, err = service.ChangePassword(ctx, wrongReq)
require.Error(t, err)
// The files should still exist after an unsuccessful attempt to change
// the wallet's password.
for _, tempFile := range tempFiles {
if _, err := os.Stat(tempFile); os.IsNotExist(err) {
t.Fatal("file does not exist but it should")
}
}
// Attempting to change the wallet's password using an invalid
// new password should fail.
wrongReq.NewPassword = []byte("8")
_, err = service.ChangePassword(ctx, wrongReq)
require.Error(t, err)
// When providing the correct wallet's current password and a new
// password that meets the length requirement, the password change
// should succeed.
errChan := make(chan error, 1)
go doChangePassword(service, testDir, req, errChan)
// The new password should be sent over the channel.
select {
case err := <-errChan:
t.Fatalf("ChangePassword call failed: %v", err)
case unlockMsg := <-service.UnlockMsgs:
require.Equal(t, newPassword, unlockMsg.Passphrase)
// Send a fake macaroon that should be returned in the response
// in the async code above.
service.MacResponseChan <- testMac
case <-time.After(defaultTestTimeout):
t.Fatalf("password not received")
}
// The files should no longer exist.
for _, tempFile := range tempFiles {
if _, err := os.Open(tempFile); err == nil {
t.Fatal("file exists but it shouldn't")
}
}
}
// TestChangeWalletPasswordStateless checks that trying to change the password
// of an existing wallet that was initialized stateless works when when the
// --stateless_init flat is set. Also checks that if no password is given,
// the default password is used.
func TestChangeWalletPasswordStateless(t *testing.T) {
t.Parallel()
// testDir is empty, meaning wallet was not created from before.
testDir, err := ioutil.TempDir("", "testchangepasswordstateless")
require.NoError(t, err)
defer func() {
_ = os.RemoveAll(testDir)
}()
// Changing the password of the wallet will also try to change the
// password of the macaroon DB. We create a default DB here but close it
// immediately so the service does not fail when trying to open it.
store, err := openOrCreateTestMacStore(
testDir, &lnwallet.DefaultPrivatePassphrase, testNetParams,
)
require.NoError(t, err)
require.NoError(t, store.Close())
// Create a temp file that will act as the macaroon DB file that will
// be deleted by changing the password.
tmpFile, err := ioutil.TempFile(testDir, "")
require.NoError(t, err)
tempMacFile := tmpFile.Name()
err = tmpFile.Close()
require.NoError(t, err)
// Create a file name that does not exist that will be used as a
// macaroon file reference. The fact that the file does not exist should
// not throw an error when --stateless_init is used.
nonExistingFile := path.Join(testDir, "does-not-exist")
// Create a new UnlockerService with our temp files.
service := walletunlocker.New(testDir, testNetParams, true, []string{
tempMacFile, nonExistingFile,
})
// Create a wallet we can try to unlock. We use the default password
// so we can check that the unlocker service defaults to this when
// we give it an empty CurrentPassword to indicate we come from a
// --noencryptwallet state.
createTestWalletWithPw(
t, lnwallet.DefaultPublicPassphrase,
lnwallet.DefaultPrivatePassphrase, testDir, testNetParams,
)
// We make sure that we get a proper error message if we forget to
// add the --stateless_init flag but the macaroon files don't exist.
badReq := &lnrpc.ChangePasswordRequest{
NewPassword: testPassword,
NewMacaroonRootKey: true,
}
ctx := context.Background()
_, err = service.ChangePassword(ctx, badReq)
require.Error(t, err)
// Prepare the correct request we are going to send to the unlocker
// service. We don't provide a current password to indicate there
// was none set before.
req := &lnrpc.ChangePasswordRequest{
NewPassword: testPassword,
StatelessInit: true,
NewMacaroonRootKey: true,
}
// Since we indicated the wallet was initialized stateless, the service
// will block until it receives the macaroon through the channel
// provided in the message in UnlockMsgs. So we need to call the service
// async and then wait for the unlock message to arrive so we can send
// back a fake macaroon.
errChan := make(chan error, 1)
go doChangePassword(service, testDir, req, errChan)
// Password and recovery window should be sent over the channel.
select {
case err := <-errChan:
t.Fatalf("ChangePassword call failed: %v", err)
case unlockMsg := <-service.UnlockMsgs:
require.Equal(t, testPassword, unlockMsg.Passphrase)
// Send a fake macaroon that should be returned in the response
// in the async code above.
service.MacResponseChan <- testMac
case <-time.After(defaultTestTimeout):
t.Fatalf("password not received")
}
}
func doChangePassword(service *walletunlocker.UnlockerService, testDir string,
req *lnrpc.ChangePasswordRequest, errChan chan error) {
// When providing the correct wallet's current password and a
// new password that meets the length requirement, the password
// change should succeed.
ctx := context.Background()
response, err := service.ChangePassword(ctx, req)
if err != nil {
errChan <- fmt.Errorf("could not change password: %v", err)
return
}
if !bytes.Equal(response.AdminMacaroon, testMac) {
errChan <- fmt.Errorf("mismatched macaroon: expected "+
"%x, got %x", testMac, response.AdminMacaroon)
}
// Close the macaroon DB and try to open it and read the root
// key with the new password.
store, err := openOrCreateTestMacStore(
testDir, &testPassword, testNetParams,
)
if err != nil {
errChan <- fmt.Errorf("could not create test store: %v", err)
return
}
_, _, err = store.RootKey(defaultRootKeyIDContext)
if err != nil {
errChan <- fmt.Errorf("could not get root key: %v", err)
return
}
// Do cleanup now. Since we are in a go func, the defer at the
// top of the outer would not work, because it would delete
// the directory before we could check the content in here.
err = store.Close()
if err != nil {
errChan <- fmt.Errorf("could not close store: %v", err)
return
}
err = os.RemoveAll(testDir)
if err != nil {
errChan <- err
return
}
}