Credential FRP: Add implementation
- Adds a facility to store a credential handle that survives factory reset
- Adds a method to KeyguardManager for verifying the stored credential for SetupWizard
- Dark launches persisting the primary user's credential as the FRP credential (behind a default-off flag)
Future work:
- Use a separate GK handle / synthetic password for the FRP credential
- Enroll the FRP credential in verifyCredential for the upgrade case
Bug: 36814845
Test: runtest -x core/tests/coretests/src/com/android/internal/widget/LockPatternUtilsTest.java && runtest -x services/tests/servicestests/src/com/android/server/LockSettingsStorageTests.java && runtest -x services/tests/servicestests/src/com/android/server/SyntheticPasswordTests.java
Change-Id: Ia739408c5ecb169e5f09670cd9ceaa7febc2b1cc
diff --git a/services/core/java/com/android/server/PersistentDataBlockManagerInternal.java b/services/core/java/com/android/server/PersistentDataBlockManagerInternal.java
new file mode 100644
index 0000000..80f8e51
--- /dev/null
+++ b/services/core/java/com/android/server/PersistentDataBlockManagerInternal.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * 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 com.android.server;
+
+/**
+ * Internal interface for storing and retrieving persistent data.
+ */
+public interface PersistentDataBlockManagerInternal {
+
+ /** Stores the handle to a lockscreen credential to be used for Factory Reset Protection. */
+ void setFrpCredentialHandle(byte[] handle);
+
+ /** Retrieves handle to a lockscreen credential to be used for Factory Reset Protection. */
+ byte[] getFrpCredentialHandle();
+}