Adding AIDL and functions for talking to RemoteProvisioner

This change adds an AIDL interface which the RemoteProvisioner app
implements that allows the keystore SPI to inform the app when an
attestation key may have been used, and when the underlying attestation
key pool is totally empty. The former is a non-blocking call, and the
latter blocks until completion.

Since the latter involves network, there are timeouts involved on the
app side to ensure that the blocking call doesn't hang indefinitely if
there's no network.

Test: atest CtsKeystoreTestCases && atest RemoteProvisionerUnitTests

Change-Id: Ie49e37659c96ce5c1626d1b99a4a7ccc62028156

1 files changed, 31 insertions, 0 deletions

diff --git a/keystore/java/android/security/GenerateRkpKeyException.java b/keystore/java/android/security/GenerateRkpKeyException.java
new file mode 100644
index 000000000000..a2d65e4e7119
--- /dev/null
+++ b/keystore/java/android/security/GenerateRkpKeyException.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2021 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 android.security;
+
+/**
+ * Thrown on problems in attempting to attest to a key using a remotely provisioned key.
+ *
+ * @hide
+ */
+public class GenerateRkpKeyException extends Exception {
+
+    /**
+     * Constructs a new {@code GenerateRkpKeyException}.
+     */
+    public GenerateRkpKeyException() {
+    }
+}