Check permissions of URI inside of Autofill Slices (73e2b35a) · Commits · e / os / android_frameworks_base

services/autofill/java/com/android/server/autofill/Helper.java

+50 −6

Original line number	Diff line number	Diff line
		@@ -25,8 +25,11 @@ import android.app.ActivityManager;
		import android.app.assist.AssistStructure;
		import android.app.assist.AssistStructure.ViewNode;
		import android.app.assist.AssistStructure.WindowNode;
		import android.app.slice.Slice;
		import android.app.slice.SliceItem;
		import android.content.ComponentName;
		import android.content.Context;
		import android.graphics.drawable.Icon;
		import android.hardware.display.DisplayManager;
		import android.metrics.LogMaker;
		import android.os.UserManager;
		@@ -55,7 +58,6 @@ import java.util.ArrayList;
		import java.util.Arrays;
		import java.util.concurrent.atomic.AtomicBoolean;


		public final class Helper {

		private static final String TAG = "AutofillHelper";
		@@ -92,8 +94,9 @@ public final class Helper {
		@UserIdInt int userId, @NonNull RemoteViews rView) {
		final AtomicBoolean permissionsOk = new AtomicBoolean(true);

		rView.visitUris(uri -> {
		int uriOwnerId = android.content.ContentProvider.getUserIdFromUri(uri);
		rView.visitUris(
		uri -> {
		int uriOwnerId = android.content.ContentProvider.getUserIdFromUri(uri, userId);
		boolean allowed = uriOwnerId == userId;
		permissionsOk.set(allowed & permissionsOk.get());
		});
		@@ -125,6 +128,47 @@ public final class Helper {
		return (ok ? rView : null);
		}

		/**
		* Checks the URI permissions of the icon in the slice, to see if the current userId is able to
		* access it.
		*
		* <p>Returns null if slice contains user inaccessible icons
		*
		* <p>TODO: instead of returning a null Slice when the current userId cannot access an icon,
		* return a reconstructed Slice without the icons. This is currently non-trivial since there are
		* no public methods to generically add SliceItems to Slices
		*/
		public static @Nullable Slice sanitizeSlice(Slice slice) {
		if (slice == null) {
		return null;
		}

		int userId = ActivityManager.getCurrentUser();

		// Recontruct the Slice, filtering out bad icons
		for (SliceItem sliceItem : slice.getItems()) {
		if (!sliceItem.getFormat().equals(SliceItem.FORMAT_IMAGE)) {
		// Not an image slice
		continue;
		}

		Icon icon = sliceItem.getIcon();
		if (icon.getType() != Icon.TYPE_URI
		&& icon.getType() != Icon.TYPE_URI_ADAPTIVE_BITMAP) {
		// No URIs to sanitize
		continue;
		}

		int iconUriId = android.content.ContentProvider.getUserIdFromUri(icon.getUri(), userId);

		if (iconUriId != userId) {
		Slog.w(TAG, "sanitizeSlice() user: " + userId + " cannot access icons in Slice");
		return null;
		}
		}

		return slice;
		}

		@Nullable
		static AutofillId[] toArray(@Nullable ArraySet<AutofillId> set) {

services/autofill/java/com/android/server/autofill/ui/RemoteInlineSuggestionViewConnector.java

+5 −0

Original line number	Diff line number	Diff line
		@@ -27,6 +27,7 @@ import android.service.autofill.InlinePresentation;
		import android.util.Slog;

		import com.android.server.LocalServices;
		import com.android.server.autofill.Helper;
		import com.android.server.autofill.RemoteInlineSuggestionRenderService;
		import com.android.server.inputmethod.InputMethodManagerInternal;

		@@ -83,6 +84,10 @@ final class RemoteInlineSuggestionViewConnector {
		*/
		public boolean renderSuggestion(int width, int height,
		@NonNull IInlineSuggestionUiCallback callback) {
		if (Helper.sanitizeSlice(mInlinePresentation.getSlice()) == null) {
		if (sDebug) Slog.d(TAG, "Skipped rendering inline suggestion.");
		return false;
		}
		if (mRemoteRenderService != null) {
		if (sDebug) Slog.d(TAG, "Request to recreate the UI");
		mRemoteRenderService.renderSuggestion(callback, mInlinePresentation, width, height,