RESTRICT AUTOMERGE: Check URI permissions for resumable media artwork (1ae94912) · Commits · e / os / android_frameworks_base

core/java/android/app/IUriGrantsManager.aidl

+3 −0

Original line number	Diff line number	Diff line
		@@ -39,4 +39,7 @@ interface IUriGrantsManager {
		void clearGrantedUriPermissions(in String packageName, int userId);
		ParceledListSlice getUriPermissions(in String packageName, boolean incoming,
		boolean persistedOnly);

		int checkGrantUriPermission_ignoreNonSystem(
		int sourceUid, String targetPkg, in Uri uri, int modeFlags, int userId);
		}

packages/SystemUI/src/com/android/systemui/media/MediaDataManager.kt

+34 −1

Original line number	Diff line number	Diff line
		@@ -18,11 +18,14 @@ package com.android.systemui.media

		import android.app.Notification
		import android.app.PendingIntent
		import android.app.UriGrantsManager
		import android.content.BroadcastReceiver
		import android.content.ContentProvider
		import android.content.ContentResolver
		import android.content.Context
		import android.content.Intent
		import android.content.IntentFilter
		import android.content.pm.PackageManager
		import android.graphics.Bitmap
		import android.graphics.Canvas
		import android.graphics.Color
		@@ -33,6 +36,7 @@ import android.media.MediaDescription
		import android.media.MediaMetadata
		import android.media.session.MediaSession
		import android.net.Uri
		import android.os.Process
		import android.os.UserHandle
		import android.service.notification.StatusBarNotification
		import android.text.TextUtils
		@@ -288,7 +292,13 @@ class MediaDataManager(
		// Album art
		var artworkBitmap = desc.iconBitmap
		if (artworkBitmap == null && desc.iconUri != null) {
		artworkBitmap = loadBitmapFromUri(desc.iconUri!!)
		val appUid = try {
		context.packageManager.getApplicationInfo(packageName, 0)?.uid!!
		} catch (e: PackageManager.NameNotFoundException) {
		Log.w(TAG, "Could not get app UID for $packageName", e)
		Process.INVALID_UID
		}
		artworkBitmap = loadBitmapFromUriForUser(desc.iconUri!!, userId, appUid, packageName)
		}
		val artworkIcon = if (artworkBitmap != null) {
		Icon.createWithBitmap(artworkBitmap)
		@@ -444,6 +454,29 @@ class MediaDataManager(
		return null
		}

		/** Returns a bitmap if the user can access the given URI, else null */
		private fun loadBitmapFromUriForUser(
		uri: Uri,
		userId: Int,
		appUid: Int,
		packageName: String
		): Bitmap? {
		try {
		val ugm = UriGrantsManager.getService()
		ugm.checkGrantUriPermission_ignoreNonSystem(
		appUid,
		packageName,
		ContentProvider.getUriWithoutUserId(uri),
		Intent.FLAG_GRANT_READ_URI_PERMISSION,
		ContentProvider.getUserIdFromUri(uri, userId)
		)
		return loadBitmapFromUri(uri)
		} catch (e: SecurityException) {
		Log.e(TAG, "Failed to get URI permission: $e")
		}
		return null
		}

		/**
		* Load a bitmap from a URI
		* @param uri the uri to load

packages/SystemUI/tests/src/com/android/systemui/media/MediaDataManagerTest.kt

+117 −0

Original line number	Diff line number	Diff line
		package com.android.systemui.media

		import android.app.IUriGrantsManager
		import android.app.Notification.MediaStyle
		import android.app.PendingIntent
		import android.app.UriGrantsManager
		import android.graphics.Bitmap
		import android.graphics.ImageDecoder
		import android.media.MediaDescription
		import android.media.MediaMetadata
		import android.media.session.MediaController
		import android.media.session.MediaSession
		import android.net.Uri
		import android.service.notification.StatusBarNotification
		import android.testing.AndroidTestingRunner
		import android.testing.TestableLooper.RunWithLooper
		import androidx.test.filters.SmallTest
		import com.android.dx.mockito.inline.extended.ExtendedMockito
		import com.android.systemui.R
		import com.android.systemui.SysuiTestCase
		import com.android.systemui.broadcast.BroadcastDispatcher
		@@ -26,6 +32,7 @@ import org.junit.Rule
		import org.junit.Test
		import org.junit.runner.RunWith
		import org.mockito.ArgumentCaptor
		import org.mockito.ArgumentMatchers.anyInt
		import org.mockito.Captor
		import org.mockito.Mock
		import org.mockito.Mockito
		@@ -33,6 +40,7 @@ import org.mockito.Mockito.mock
		import org.mockito.Mockito.verify
		import org.mockito.junit.MockitoJUnit
		import org.mockito.Mockito.`when` as whenever
		import org.mockito.quality.Strictness

		private const val KEY = "KEY"
		private const val KEY_2 = "KEY_2"
		@@ -68,6 +76,8 @@ class MediaDataManagerTest : SysuiTestCase() {
		lateinit var mediaDataManager: MediaDataManager
		lateinit var mediaNotification: StatusBarNotification
		@Captor lateinit var mediaDataCaptor: ArgumentCaptor<MediaData>
		@Mock private lateinit var ugm: IUriGrantsManager
		@Mock private lateinit var imageSource: ImageDecoder.Source

		@Before
		fun setup() {
		@@ -313,6 +323,113 @@ class MediaDataManagerTest : SysuiTestCase() {
		assertThat(data.actions).hasSize(1)
		}

		@Test
		fun testResumeMediaLoaded_hasArtPermission_artLoaded() {
		// When resume media is loaded and user/app has permission to access the art URI,
		var mockSession = ExtendedMockito.mockitoSession()
		.mockStatic<UriGrantsManager>(UriGrantsManager::class.java)
		.mockStatic<ImageDecoder>(ImageDecoder::class.java)
		.strictness(Strictness.LENIENT)
		.startMocking()
		try {
		whenever(UriGrantsManager.getService()).thenReturn(ugm)
		whenever(
		ugm.checkGrantUriPermission_ignoreNonSystem(
		anyInt(),
		anyObject(),
		anyObject(),
		anyInt(),
		anyInt()
		)
		)
		.thenReturn(1)
		val artwork = Bitmap.createBitmap(10, 10, Bitmap.Config.ARGB_8888)
		val uri = Uri.parse("content://example")
		whenever(ImageDecoder.createSource(anyObject(), eq(uri))).thenReturn(imageSource)
		whenever(ImageDecoder.decodeBitmap(anyObject(), anyObject())).thenReturn(artwork)

		val desc =
		MediaDescription.Builder().run {
		setTitle(SESSION_TITLE)
		setIconUri(uri)
		build()
		}
		addResumeControlAndLoad(desc)

		// Then the artwork is loaded
		assertThat(mediaDataCaptor.value.artwork).isNotNull()
		} finally {
		mockSession.finishMocking()
		}
		}

		@Test
		fun testResumeMediaLoaded_noArtPermission_noArtLoaded() {
		// When resume media is loaded and user/app does not have permission to access the art URI
		var mockSession = ExtendedMockito.mockitoSession()
		.mockStatic<UriGrantsManager>(UriGrantsManager::class.java)
		.mockStatic<ImageDecoder>(ImageDecoder::class.java)
		.strictness(Strictness.LENIENT)
		.startMocking()
		try {
		whenever(UriGrantsManager.getService()).thenReturn(ugm)
		whenever(
		ugm.checkGrantUriPermission_ignoreNonSystem(
		anyInt(),
		anyObject(),
		anyObject(),
		anyInt(),
		anyInt()
		)
		)
		.thenThrow(SecurityException("Test no permission"))
		val artwork = Bitmap.createBitmap(10, 10, Bitmap.Config.ARGB_8888)
		val uri = Uri.parse("content://example")
		whenever(ImageDecoder.createSource(anyObject(), eq(uri))).thenReturn(imageSource)
		whenever(ImageDecoder.decodeBitmap(anyObject(), anyObject())).thenReturn(artwork)

		val desc =
		MediaDescription.Builder().run {
		setTitle(SESSION_TITLE)
		setIconUri(uri)
		build()
		}
		addResumeControlAndLoad(desc)

		// Then the artwork is not loaded
		assertThat(mediaDataCaptor.value.artwork).isNull()
		} finally {
		mockSession.finishMocking()
		}
		}

		/** Helper function to add a resumption control and capture the resulting MediaData */
		private fun addResumeControlAndLoad(
		desc: MediaDescription,
		packageName: String = PACKAGE_NAME
		) {
		val listener = mock(MediaDataManager.Listener::class.java)
		mediaDataManager.addListener(listener)
		mediaDataManager.addResumptionControls(
		USER_ID,
		desc,
		Runnable {},
		session.sessionToken,
		APP_NAME,
		pendingIntent,
		packageName
		)
		assertThat(backgroundExecutor.runAllReady()).isEqualTo(1)
		assertThat(foregroundExecutor.runAllReady()).isEqualTo(1)

		verify(listener)
		.onMediaDataLoaded(
		eq(packageName),
		eq(null),
		capture(mediaDataCaptor)
		)
		}

		/**
		* Simple implementation of [MediaDataManager.Listener] for the test.
		*

services/core/java/com/android/server/uri/UriGrantsManagerService.java

+42 −0

Original line number	Diff line number	Diff line
		@@ -45,6 +45,7 @@ import static org.xmlpull.v1.XmlPullParser.END_DOCUMENT;
		import static org.xmlpull.v1.XmlPullParser.START_TAG;

		import android.annotation.Nullable;
		import android.annotation.RequiresPermission;
		import android.app.ActivityManager;
		import android.app.ActivityManagerInternal;
		import android.app.AppGlobals;
		@@ -67,6 +68,7 @@ import android.os.Handler;
		import android.os.IBinder;
		import android.os.Looper;
		import android.os.Message;
		import android.os.Process;
		import android.os.RemoteException;
		import android.os.SystemClock;
		import android.os.UserHandle;
		@@ -1290,6 +1292,46 @@ public class UriGrantsManagerService extends IUriGrantsManager.Stub {
		return false;
		}

		/**
		* Check if the targetPkg can be granted permission to access uri by
		* the callingUid using the given modeFlags. See {@link #checkGrantUriPermissionUnlocked}.
		*
		* @param callingUid The uid of the grantor app that has permissions to the uri.
		* @param targetPkg The package name of the granted app that needs permissions to the uri.
		* @param uri The uri for which permissions should be granted.
		* @param modeFlags The modes to grant. See {@link Intent#FLAG_GRANT_READ_URI_PERMISSION}, etc.
		* @param userId The userId in which the uri is to be resolved.
		* @return uid of the target or -1 if permission grant not required. Returns -1 if the caller
		* does not hold INTERACT_ACROSS_USERS_FULL
		* @throws SecurityException if the grant is not allowed.
		*/
		@Override
		@RequiresPermission(android.Manifest.permission.INTERACT_ACROSS_USERS_FULL)
		public int checkGrantUriPermission_ignoreNonSystem(int callingUid, String targetPkg, Uri uri,
		int modeFlags, int userId) {
		if (!isCallerIsSystemOrPrivileged()) {
		return Process.INVALID_UID;
		}
		final long origId = Binder.clearCallingIdentity();
		try {
		return checkGrantUriPermissionUnlocked(callingUid, targetPkg, uri, modeFlags,
		userId);
		} finally {
		Binder.restoreCallingIdentity(origId);
		}
		}

		private boolean isCallerIsSystemOrPrivileged() {
		final int uid = Binder.getCallingUid();
		if (uid == Process.SYSTEM_UID \|\| uid == Process.ROOT_UID) {
		return true;
		}
		return ActivityManager.checkComponentPermission(
		android.Manifest.permission.INTERACT_ACROSS_USERS_FULL,
		uid, /* owningUid = /-1, / exported = */ true)
		== PackageManager.PERMISSION_GRANTED;
		}

		@GuardedBy("mLock")
		private void writeGrantedUriPermissionsLocked() {
		if (DEBUG) Slog.v(TAG, "writeGrantedUriPermissions()");