Add a new system service for blob store management.

This change adds a bare-bones system service, implementation will follow
later.

Bug: 143559646
Test: atest cts/tests/BlobStore/src/com/android/cts/blob/BlobStoreManagerTest.java
Change-Id: Idf21dfcd11dd32a42b62c6ad965d6f5ad7eed1b4

Android.bp

@@ -212,6 +212,7 @@ filegroup {
     name: "framework-non-updatable-sources",
     srcs: [
         // Java/AIDL sources under frameworks/base
+        ":framework-blobstore-sources",
         ":framework-core-sources",
         ":framework-drm-sources",
         ":framework-graphics-sources",

apex/blobstore/framework/Android.bp

@@ -0,0 +1,40 @@
+// Copyright (C) 2019 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.
+
+filegroup {
+    name: "framework-blobstore-sources",
+    srcs: [
+        "java/**/*.java",
+        "java/**/*.aidl"
+    ],
+    path: "java",
+}
+
+java_library {
+    name: "blobstore-framework",
+    installable: false,
+    compile_dex: true,
+    sdk_version: "core_platform",
+    srcs: [
+        ":framework-blobstore-sources",
+    ],
+    aidl: {
+        export_include_dirs: [
+            "java",
+        ],
+    },
+    libs: [
+        "framework-minus-apex",
+    ],
+}

apex/blobstore/framework/java/android/app/blob/BlobStoreManager.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2019 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.app.blob;
+
+import android.annotation.SystemService;
+import android.content.Context;
+
+/**
+ * This class provides access to the blob store maintained by the system.
+ *
+ * Apps can publish data blobs which might be useful for other apps on the device to be
+ * maintained by the system and apps that would like to access these data blobs can do so
+ * by addressing them via their cryptographically secure hashes.
+ *
+ * TODO: make this public once the APIs are added.
+ * @hide
+ */
+@SystemService(Context.BLOB_STORE_SERVICE)
+public class BlobStoreManager {
+    private final Context mContext;
+    private final IBlobStoreManager mService;
+
+    /** @hide */
+    public BlobStoreManager(Context context, IBlobStoreManager service) {
+        mContext = context;
+        mService = service;
+    }
+}

apex/blobstore/framework/java/android/app/blob/BlobStoreManagerFrameworkInitializer.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2019 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.app.blob;
+
+import android.app.SystemServiceRegistry;
+import android.content.Context;
+
+/**
+ * This is where the BlobStoreManagerService wrapper is registered.
+ *
+ * @hide
+ */
+public class BlobStoreManagerFrameworkInitializer {
+    /** Register the BlobStoreManager wrapper class */
+    public static void initialize() {
+        SystemServiceRegistry.registerCachedService(
+                Context.BLOB_STORE_SERVICE, BlobStoreManager.class,
+                (context, service) ->
+                        new BlobStoreManager(context, IBlobStoreManager.Stub.asInterface(service)));
+    }
+}

apex/blobstore/framework/java/android/app/blob/IBlobStoreManager.aidl

@@ -0,0 +1,20 @@
+/**
+ * Copyright 2019, 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.app.blob;
+
+/** {@hide} */
+interface IBlobStoreManager {
+}

apex/blobstore/service/Android.bp

@@ -0,0 +1,27 @@
+// Copyright (C) 2019 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.
+
+java_library {
+    name: "blobstore-service",
+    installable: true,
+
+    srcs: [
+        "java/**/*.java",
+    ],
+
+    libs: [
+        "framework",
+        "services.core",
+    ],
+}

apex/blobstore/service/java/com/android/server/blob/BlobStoreManagerService.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2019 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.blob;
+
+import android.app.blob.IBlobStoreManager;
+import android.content.Context;
+
+import com.android.server.SystemService;
+
+/**
+ * Service responsible for maintaining and facilitating access to data blobs published by apps.
+ */
+public class BlobStoreManagerService extends SystemService {
+
+    public BlobStoreManagerService(Context context) {
+        super(context);
+    }
+
+    @Override
+    public void onStart() {
+        publishBinderService(Context.BLOB_STORE_SERVICE, new Stub());
+    }
+
+    private class Stub extends IBlobStoreManager.Stub {
+    }
+}

api/test-current.txt

@@ -701,6 +701,7 @@ package android.content {
     method public int getUserId();
     method public void setAutofillOptions(@Nullable android.content.AutofillOptions);
     method public void setContentCaptureOptions(@Nullable android.content.ContentCaptureOptions);
+    field public static final String BLOB_STORE_SERVICE = "blob_store";
     field public static final String BUGREPORT_SERVICE = "bugreport";
     field public static final String CONTENT_CAPTURE_MANAGER_SERVICE = "content_capture";
     field public static final String DEVICE_IDLE_CONTROLLER = "deviceidle";

config/preloaded-classes

@@ -546,6 +546,7 @@ android.app.backup.IBackupManager$Stub$Proxy
 android.app.backup.IBackupManager$Stub
 android.app.backup.IBackupManager
 android.app.backup.SharedPreferencesBackupHelper
+android.app.blob.BlobStoreManagerFrameworkInitializer
 android.app.contentsuggestions.ContentSuggestionsManager
 android.app.job.IJobCallback$Stub$Proxy
 android.app.job.IJobCallback$Stub

core/java/android/app/SystemServiceRegistry.java

@@ -21,6 +21,7 @@ import android.accounts.IAccountManager;
 import android.app.ContextImpl.ServiceInitializationState;
 import android.app.admin.DevicePolicyManager;
 import android.app.admin.IDevicePolicyManager;
+import android.app.blob.BlobStoreManagerFrameworkInitializer;
 import android.app.contentsuggestions.ContentSuggestionsManager;
 import android.app.contentsuggestions.IContentSuggestionsManager;
 import android.app.job.JobSchedulerFrameworkInitializer;
@@ -1311,6 +1312,8 @@ public final class SystemServiceRegistry {
 
         JobSchedulerFrameworkInitializer.initialize();
         DeviceIdleFrameworkInitializer.initialize();
+
+        BlobStoreManagerFrameworkInitializer.initialize();
     }
 
     /**

core/java/android/content/Context.java

@@ -4781,6 +4781,20 @@ public abstract class Context {
      */
     public static final String DYNAMIC_SYSTEM_SERVICE = "dynamic_system";
 
+    /**
+     * Use with {@link #getSystemService(String)} to retrieve a {@link
+     * android.app.blob.BlobStoreManager} for contributing and accessing data blobs
+     * from the blob store maintained by the system.
+     *
+     * @see #getSystemService(String)
+     * @see android.app.blob.BlobStoreManager
+     *
+     * TODO: make this public once BlobStoreManager is ready.
+     * @hide
+     */
+    @TestApi
+    public static final String BLOB_STORE_SERVICE = "blob_store";
+
     /**
      * Use with {@link #getSystemService(String)} to retrieve an
      * {@link TelephonyRegistryManager}.

services/java/com/android/server/SystemServer.java

@@ -277,6 +277,8 @@ public final class SystemServer {
             "com.android.server.contentsuggestions.ContentSuggestionsManagerService";
     private static final String DEVICE_IDLE_CONTROLLER_CLASS =
             "com.android.server.DeviceIdleController";
+    private static final String BLOB_STORE_MANAGER_SERVICE_CLASS =
+            "com.android.server.blob.BlobStoreManagerService";
 
     private static final String PERSISTENT_DATA_BLOCK_PROP = "ro.frp.pst";
 
@@ -1902,6 +1904,10 @@ public final class SystemServer {
         mSystemServiceManager.startService(ClipboardService.class);
         t.traceEnd();
 
+        t.traceBegin("StartBlobStoreManagerService");
+        mSystemServiceManager.startService(BLOB_STORE_MANAGER_SERVICE_CLASS);
+        t.traceEnd();
+
         t.traceBegin("AppServiceManager");
         mSystemServiceManager.startService(AppBindingService.Lifecycle.class);
         t.traceEnd();