2 files changed, 42 insertions, 2 deletions
diff --git a/accounts/account_manager.go b/accounts/account_manager.go
index 3afadf6b2..bfb7556d6 100644
--- a/accounts/account_manager.go
+++ b/accounts/account_manager.go
@@ -147,9 +147,21 @@ func (am *Manager) Sign(addr common.Address, hash []byte) (signature []byte, err
 	return crypto.Sign(hash, unlockedKey.PrivateKey)
 }
 
+// SignWithPassphrase signs hash if the private key matching the given address can be
+// decrypted with the given passphrase.
+func (am *Manager) SignWithPassphrase(addr common.Address, passphrase string, hash []byte) (signature []byte, err error) {
+	_, key, err := am.getDecryptedKey(Account{Address: addr}, passphrase)
+	if err != nil {
+		return nil, err
+	}
+
+	defer zeroKey(key.PrivateKey)
+	return crypto.Sign(hash, key.PrivateKey)
+}
+
 // Unlock unlocks the given account indefinitely.
-func (am *Manager) Unlock(a Account, keyAuth string) error {
-	return am.TimedUnlock(a, keyAuth, 0)
+func (am *Manager) Unlock(a Account, passphrase string) error {
+	return am.TimedUnlock(a, passphrase, 0)
 }
 
 // Lock removes the private key with the given address from memory.
diff --git a/accounts/accounts_test.go b/accounts/accounts_test.go
index 829cf3968..2e5f2b44a 100644
--- a/accounts/accounts_test.go
+++ b/accounts/accounts_test.go
@@ -81,6 +81,34 @@ func TestSign(t *testing.T) {
 	}
 }
 
+func TestSignWithPassphrase(t *testing.T) {
+	dir, am := tmpManager(t, true)
+	defer os.RemoveAll(dir)
+
+	pass := "passwd"
+	acc, err := am.NewAccount(pass)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if _, unlocked := am.unlocked[acc.Address]; unlocked {
+		t.Fatal("expected account to be locked")
+	}
+
+	_, err = am.SignWithPassphrase(acc.Address, pass, testSigData)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if _, unlocked := am.unlocked[acc.Address]; unlocked {
+		t.Fatal("expected account to be locked")
+	}
+
+	if _, err = am.SignWithPassphrase(acc.Address, "invalid passwd", testSigData); err == nil {
+		t.Fatal("expected SignHash to fail with invalid password")
+	}
+}
+
 func TestTimedUnlock(t *testing.T) {
 	dir, am := tmpManager(t, true)
 	defer os.RemoveAll(dir)