Add package menager for content protection

Bug: 275732576
Test: Added a new test
Change-Id: I07c3bbb8c85f55be57843fed788cbdf0245aa750

services/contentcapture/java/com/android/server/contentprotection/ContentProtectionPackageManager.java

@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2023 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.contentprotection;
+
+import android.Manifest;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.content.pm.PackageManager.PackageInfoFlags;
+import android.util.Slog;
+
+import java.util.Arrays;
+
+/**
+ * Basic package manager for content protection using content capture.
+ *
+ * @hide
+ */
+final class ContentProtectionPackageManager {
+    private static final String TAG = ContentProtectionPackageManager.class.getSimpleName();
+
+    private static final PackageInfoFlags PACKAGE_INFO_FLAGS =
+            PackageInfoFlags.of(PackageManager.GET_PERMISSIONS);
+
+    @NonNull private final PackageManager mPackageManager;
+
+    ContentProtectionPackageManager(@NonNull Context context) {
+        mPackageManager = context.getPackageManager();
+    }
+
+    @Nullable
+    public PackageInfo getPackageInfo(@NonNull String packageName) {
+        try {
+            return mPackageManager.getPackageInfo(packageName, PACKAGE_INFO_FLAGS);
+        } catch (NameNotFoundException ex) {
+            Slog.w(TAG, "Package info not found: ", ex);
+            return null;
+        }
+    }
+
+    public boolean isSystemApp(@NonNull PackageInfo packageInfo) {
+        return packageInfo.applicationInfo != null && isSystemApp(packageInfo.applicationInfo);
+    }
+
+    private boolean isSystemApp(@NonNull ApplicationInfo applicationInfo) {
+        return (applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0;
+    }
+
+    public boolean isUpdatedSystemApp(@NonNull PackageInfo packageInfo) {
+        return packageInfo.applicationInfo != null
+                && isUpdatedSystemApp(packageInfo.applicationInfo);
+    }
+
+    private boolean isUpdatedSystemApp(@NonNull ApplicationInfo applicationInfo) {
+        return (applicationInfo.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0;
+    }
+
+    public boolean hasRequestedInternetPermissions(@NonNull PackageInfo packageInfo) {
+        return packageInfo.requestedPermissions != null
+                && Arrays.asList(packageInfo.requestedPermissions)
+                        .contains(Manifest.permission.INTERNET);
+    }
+}

services/tests/servicestests/Android.bp

@@ -28,6 +28,7 @@ android_test {
         "services.accessibility",
         "services.appwidget",
         "services.autofill",
+        "services.contentcapture",
         "services.backup",
         "services.companion",
         "services.core",

services/tests/servicestests/src/com/android/server/contentprotection/ContentProtectionPackageManagerTest.java

@@ -0,0 +1,207 @@
+/*
+ * Copyright (C) 2023 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.contentprotection;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.when;
+
+import android.Manifest.permission;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.content.pm.PackageManager.PackageInfoFlags;
+import android.testing.TestableContext;
+
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+
+/**
+ * Test for {@link ContentProtectionPackageManager}.
+ *
+ * <p>Run with: {@code atest
+ * FrameworksServicesTests:com.android.server.contentprotection.ContentProtectionPackageManagerTest}
+ */
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class ContentProtectionPackageManagerTest {
+    private static final String PACKAGE_NAME = "PACKAGE_NAME";
+
+    private static final PackageInfo EMPTY_PACKAGE_INFO = new PackageInfo();
+
+    private static final PackageInfo SYSTEM_APP_PACKAGE_INFO = createSystemAppPackageInfo();
+
+    private static final PackageInfo UPDATED_SYSTEM_APP_PACKAGE_INFO =
+            createUpdatedSystemAppPackageInfo();
+
+    @Rule public final MockitoRule mMockitoRule = MockitoJUnit.rule();
+
+    @Rule
+    public final TestableContext mContext =
+            new TestableContext(ApplicationProvider.getApplicationContext());
+
+    @Mock private PackageManager mMockPackageManager;
+
+    private ContentProtectionPackageManager mContentProtectionPackageManager;
+
+    @Before
+    public void setup() {
+        mContext.setMockPackageManager(mMockPackageManager);
+        mContentProtectionPackageManager = new ContentProtectionPackageManager(mContext);
+    }
+
+    @Test
+    public void getPackageInfo_found() throws Exception {
+        PackageInfo expected = createPackageInfo(/* flags= */ 0);
+        when(mMockPackageManager.getPackageInfo(eq(PACKAGE_NAME), any(PackageInfoFlags.class)))
+                .thenReturn(expected);
+
+        PackageInfo actual = mContentProtectionPackageManager.getPackageInfo(PACKAGE_NAME);
+
+        assertThat(actual).isEqualTo(expected);
+    }
+
+    @Test
+    public void getPackageInfo_notFound() throws Exception {
+        when(mMockPackageManager.getPackageInfo(eq(PACKAGE_NAME), any(PackageInfoFlags.class)))
+                .thenThrow(new NameNotFoundException());
+
+        PackageInfo actual = mContentProtectionPackageManager.getPackageInfo(PACKAGE_NAME);
+
+        assertThat(actual).isNull();
+    }
+
+    @Test
+    public void getPackageInfo_null() {
+        PackageInfo actual = mContentProtectionPackageManager.getPackageInfo(PACKAGE_NAME);
+
+        assertThat(actual).isNull();
+    }
+
+    @Test
+    public void isSystemApp_true() {
+        boolean actual = mContentProtectionPackageManager.isSystemApp(SYSTEM_APP_PACKAGE_INFO);
+
+        assertThat(actual).isTrue();
+    }
+
+    @Test
+    public void isSystemApp_false() {
+        boolean actual =
+                mContentProtectionPackageManager.isSystemApp(UPDATED_SYSTEM_APP_PACKAGE_INFO);
+
+        assertThat(actual).isFalse();
+    }
+
+    @Test
+    public void isSystemApp_noApplicationInfo() {
+        boolean actual = mContentProtectionPackageManager.isSystemApp(EMPTY_PACKAGE_INFO);
+
+        assertThat(actual).isFalse();
+    }
+
+    @Test
+    public void isUpdatedSystemApp_true() {
+        boolean actual =
+                mContentProtectionPackageManager.isUpdatedSystemApp(
+                        UPDATED_SYSTEM_APP_PACKAGE_INFO);
+
+        assertThat(actual).isTrue();
+    }
+
+    @Test
+    public void isUpdatedSystemApp_false() {
+        boolean actual =
+                mContentProtectionPackageManager.isUpdatedSystemApp(SYSTEM_APP_PACKAGE_INFO);
+
+        assertThat(actual).isFalse();
+    }
+
+    @Test
+    public void isUpdatedSystemApp_noApplicationInfo() {
+        boolean actual = mContentProtectionPackageManager.isUpdatedSystemApp(EMPTY_PACKAGE_INFO);
+
+        assertThat(actual).isFalse();
+    }
+
+    @Test
+    public void hasRequestedInternetPermissions_true() {
+        PackageInfo packageInfo = createPackageInfo(new String[] {permission.INTERNET});
+
+        boolean actual =
+                mContentProtectionPackageManager.hasRequestedInternetPermissions(packageInfo);
+
+        assertThat(actual).isTrue();
+    }
+
+    @Test
+    public void hasRequestedInternetPermissions_false() {
+        PackageInfo packageInfo = createPackageInfo(new String[] {permission.ACCESS_FINE_LOCATION});
+
+        boolean actual =
+                mContentProtectionPackageManager.hasRequestedInternetPermissions(packageInfo);
+
+        assertThat(actual).isFalse();
+    }
+
+    @Test
+    public void hasRequestedInternetPermissions_noRequestedPermissions() {
+        boolean actual =
+                mContentProtectionPackageManager.hasRequestedInternetPermissions(
+                        EMPTY_PACKAGE_INFO);
+
+        assertThat(actual).isFalse();
+    }
+
+    private static PackageInfo createSystemAppPackageInfo() {
+        return createPackageInfo(ApplicationInfo.FLAG_SYSTEM);
+    }
+
+    private static PackageInfo createUpdatedSystemAppPackageInfo() {
+        return createPackageInfo(ApplicationInfo.FLAG_UPDATED_SYSTEM_APP);
+    }
+
+    private static PackageInfo createPackageInfo(int flags) {
+        return createPackageInfo(flags, /* requestedPermissions= */ new String[0]);
+    }
+
+    private static PackageInfo createPackageInfo(String[] requestedPermissions) {
+        return createPackageInfo(/* flags= */ 0, requestedPermissions);
+    }
+
+    private static PackageInfo createPackageInfo(int flags, String[] requestedPermissions) {
+        PackageInfo packageInfo = new PackageInfo();
+        packageInfo.packageName = PACKAGE_NAME;
+        packageInfo.applicationInfo = new ApplicationInfo();
+        packageInfo.applicationInfo.packageName = PACKAGE_NAME;
+        packageInfo.applicationInfo.flags = flags;
+        packageInfo.requestedPermissions = requestedPermissions;
+        return packageInfo;
+    }
+}