VerifyAccountPassword: locate key file by traversing key store folder

cmd/statusd/library.go

@@ -78,8 +78,8 @@ func RecoverAccount(password, mnemonic *C.char) *C.char {
 }
 
 //export VerifyAccountPassword
-func VerifyAccountPassword(keyPath, address, password *C.char) *C.char {
-	_, err := geth.VerifyAccountPassword(C.GoString(keyPath), C.GoString(address), C.GoString(password))
+func VerifyAccountPassword(keyStoreDir, address, password *C.char) *C.char {
+	_, err := geth.VerifyAccountPassword(C.GoString(keyStoreDir), C.GoString(address), C.GoString(password))
 	return makeJSONErrorResponse(err)
 }
 

cmd/statusd/utils.go

@@ -120,11 +120,20 @@ func testVerifyAccountPassword(t *testing.T) bool {
 	if err = geth.ImportTestAccount(tmpDir, "test-account1.pk"); err != nil {
 		t.Fatal(err)
 	}
+	if err = geth.ImportTestAccount(tmpDir, "test-account2.pk"); err != nil {
+		t.Fatal(err)
+	}
+
+	// rename account file (to see that file's internals reviewed, when locating account key)
+	accountFilePathOriginal := filepath.Join(tmpDir, "test-account1.pk")
+	accountFilePath := filepath.Join(tmpDir, "foo"+testConfig.Account1.Address+"bar.pk")
+	if err := os.Rename(accountFilePathOriginal, accountFilePath); err != nil {
+		t.Fatal(err)
+	}
 
-	accountFilePath := filepath.Join(tmpDir, "test-account1.pk")
 	response := geth.JSONError{}
 	rawResponse := VerifyAccountPassword(
-		C.CString(accountFilePath),
+		C.CString(tmpDir),
 		C.CString(testConfig.Account1.Address),
 		C.CString(testConfig.Account1.Password))
 

geth/accounts.go

@@ -1,9 +1,12 @@
 package geth
 
 import (
+	"bytes"
 	"errors"
 	"fmt"
 	"io/ioutil"
+	"os"
+	"path/filepath"
 
 	"github.com/ethereum/go-ethereum/accounts"
 	"github.com/ethereum/go-ethereum/accounts/keystore"
@@ -129,10 +132,39 @@ func RecoverAccount(password, mnemonic string) (address, pubKey string, err erro
 
 // VerifyAccountPassword tries to decrypt a given account key file, with a provided password.
 // If no error is returned, then account is considered verified.
-func VerifyAccountPassword(keyPath, address, password string) (*keystore.Key, error) {
-	keyJSON, err := ioutil.ReadFile(keyPath)
+func VerifyAccountPassword(keyStoreDir, address, password string) (*keystore.Key, error) {
+	var err error
+	var keyJSON []byte
+
+	addressObj := common.BytesToAddress(common.FromHex(address))
+	checkAccountKey := func(path string, fileInfo os.FileInfo) error {
+		if len(keyJSON) > 0 || fileInfo.IsDir() {
+			return nil
+		}
+
+		keyJSON, err = ioutil.ReadFile(path)
 		if err != nil {
-		return nil, fmt.Errorf("invalid account key file: %v", err)
+			return fmt.Errorf("invalid account key file: %v", err)
+		}
+		if !bytes.Contains(keyJSON, []byte(fmt.Sprintf(`"address":"%s"`, addressObj.Hex()[2:]))) {
+			keyJSON = []byte{}
+		}
+
+		return nil
+	}
+	// locate key within key store directory (address should be within the file)
+	err = filepath.Walk(keyStoreDir, func(path string, fileInfo os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		return checkAccountKey(path, fileInfo)
+	})
+	if err != nil {
+		return nil, fmt.Errorf("cannot traverse key store folder: %v", err)
+	}
+
+	if len(keyJSON) == 0 {
+		return nil, fmt.Errorf("cannot locate account for address: %x", addressObj)
 	}
 
 	key, err := keystore.DecryptKey(keyJSON, password)
@@ -141,9 +173,8 @@ func VerifyAccountPassword(keyPath, address, password string) (*keystore.Key, er
 	}
 
 	// avoid swap attack
-	addr := common.BytesToAddress(common.FromHex(address))
-	if key.Address != addr {
-		return nil, fmt.Errorf("account mismatch: have %x, want %x", key.Address, addr)
+	if key.Address != addressObj {
+		return nil, fmt.Errorf("account mismatch: have %x, want %x", key.Address, addressObj)
 	}
 
 	return key, nil

geth/accounts_test.go

@@ -14,19 +14,27 @@ import (
 )
 
 func TestVerifyAccountPassword(t *testing.T) {
-	tmpDir, err := ioutil.TempDir(os.TempDir(), "accounts")
+	keyStoreDir, err := ioutil.TempDir(os.TempDir(), "accounts")
 	if err != nil {
 		t.Fatal(err)
 	}
-	defer os.RemoveAll(tmpDir) // nolint: errcheck
+	defer os.RemoveAll(keyStoreDir) // nolint: errcheck
 
-	if err = geth.ImportTestAccount(tmpDir, "test-account1.pk"); err != nil {
+	emptyKeyStoreDir, err := ioutil.TempDir(os.TempDir(), "empty")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(emptyKeyStoreDir) // nolint: errcheck
+
+	// import account keys
+	if err = geth.ImportTestAccount(keyStoreDir, "test-account1.pk"); err != nil {
+		t.Fatal(err)
+	}
+	if err = geth.ImportTestAccount(keyStoreDir, "test-account2.pk"); err != nil {
 		t.Fatal(err)
 	}
 
-	accountFilePath := filepath.Join(tmpDir, "test-account1.pk")
 	account1Address := common.BytesToAddress(common.FromHex(testConfig.Account1.Address))
-	account2Address := common.BytesToAddress(common.FromHex(testConfig.Account2.Address))
 
 	testCases := []struct {
 		name          string
@@ -37,28 +45,35 @@ func TestVerifyAccountPassword(t *testing.T) {
 	}{
 		{
 			"correct address, correct password (decrypt should succeed)",
-			accountFilePath,
+			keyStoreDir,
 			testConfig.Account1.Address,
 			testConfig.Account1.Password,
 			nil,
 		},
 		{
-			"correct address, correct password, invalid key file",
-			filepath.Join(tmpDir, "non-existent-file.pk"),
+			"correct address, correct password, non-existent key store",
+			filepath.Join(keyStoreDir, "non-existent-folder"),
 			testConfig.Account1.Address,
 			testConfig.Account1.Password,
-			fmt.Errorf("invalid account key file: open %s/non-existent-file.pk: no such file or directory", tmpDir),
+			fmt.Errorf("cannot traverse key store folder: lstat %s/non-existent-folder: no such file or directory", keyStoreDir),
+		},
+		{
+			"correct address, correct password, empty key store (pk is not there)",
+			emptyKeyStoreDir,
+			testConfig.Account1.Address,
+			testConfig.Account1.Password,
+			fmt.Errorf("cannot locate account for address: %x", account1Address),
 		},
 		{
 			"wrong address, correct password",
-			accountFilePath,
-			testConfig.Account2.Address, // wrong address (swap attack)
+			keyStoreDir,
+			"0x79791d3e8f2daa1f7fec29649d152c0ada3cc535",
 			testConfig.Account1.Password,
-			fmt.Errorf("account mismatch: have %x, want %x", account1Address, account2Address),
+			fmt.Errorf("cannot locate account for address: %s", "79791d3e8f2daa1f7fec29649d152c0ada3cc535"),
 		},
 		{
 			"correct address, wrong password",
-			accountFilePath,
+			keyStoreDir,
 			testConfig.Account1.Address,
 			"wrong password", // wrong password
 			errors.New("could not decrypt key with given passphrase"),
@@ -68,7 +83,7 @@ func TestVerifyAccountPassword(t *testing.T) {
 		t.Log(testCase.name)
 		accountKey, err := geth.VerifyAccountPassword(testCase.keyPath, testCase.address, testCase.password)
 		if !reflect.DeepEqual(err, testCase.expectedError) {
-			t.Errorf("unexpected error: expected \n'%v', got \n'%v'", testCase.expectedError, err)
+			t.Fatalf("unexpected error: expected \n'%v', got \n'%v'", testCase.expectedError, err)
 		}
 		if err == nil {
 			if accountKey == nil {
@@ -76,7 +91,7 @@ func TestVerifyAccountPassword(t *testing.T) {
 			}
 			accountAddress := common.BytesToAddress(common.FromHex(testCase.address))
 			if accountKey.Address != accountAddress {
-				t.Errorf("account mismatch: have %x, want %x", accountKey.Address, accountAddress)
+				t.Fatalf("account mismatch: have %x, want %x", accountKey.Address, accountAddress)
 			}
 		}
 	}