Adding KeyChain API and IKeyChainService

Change-Id: Id3eaa2d1315481f199777b50e875811e3532988a
diff --git a/keystore/java/android/security/IKeyChainService.aidl b/keystore/java/android/security/IKeyChainService.aidl
new file mode 100644
index 0000000..64f5a48
--- /dev/null
+++ b/keystore/java/android/security/IKeyChainService.aidl
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2011 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;
+
+import android.os.Bundle;
+
+/**
+ * Caller is required to ensure that {@link KeyStore#unlock
+ * KeyStore.unlock} was successful.
+ *
+ * @hide
+ */
+interface IKeyChainService {
+    byte[] getPrivate(String alias, String authToken);
+    byte[] getCertificate(String alias, String authToken);
+    byte[] getCaCertificate(String alias, String authToken);
+    String findIssuer(in Bundle cert);
+}