Validate that the authority of incoming uris matches. (f300babd) · Commits · e / os / android_frameworks_base

core/java/android/content/ContentProvider.java

+71 −19

Original line number	Diff line number	Diff line
		@@ -97,6 +97,11 @@ public abstract class ContentProvider implements ComponentCallbacks2 {

		private Context mContext = null;
		private int mMyUid;

		// Since most Providers have only one authority, we keep both a String and a String[] to improve
		// performance.
		private String mAuthority;
		private String[] mAuthorities;
		private String mReadPermission;
		private String mWritePermission;
		private PathPermission[] mPathPermissions;
		@@ -193,7 +198,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
		public Cursor query(String callingPkg, Uri uri, String[] projection,
		String selection, String[] selectionArgs, String sortOrder,
		ICancellationSignal cancellationSignal) {
		getAndEnforceUserId(uri);
		validateIncomingUri(uri);
		uri = getUriWithoutUserId(uri);
		if (enforceReadPermission(callingPkg, uri) != AppOpsManager.MODE_ALLOWED) {
		return rejectQuery(uri, projection, selection, selectionArgs, sortOrder,
		@@ -211,14 +216,15 @@ public abstract class ContentProvider implements ComponentCallbacks2 {

		@Override
		public String getType(Uri uri) {
		getAndEnforceUserId(uri);
		validateIncomingUri(uri);
		uri = getUriWithoutUserId(uri);
		return ContentProvider.this.getType(uri);
		}

		@Override
		public Uri insert(String callingPkg, Uri uri, ContentValues initialValues) {
		int userId = getAndEnforceUserId(uri);
		validateIncomingUri(uri);
		int userId = getUserIdFromUri(uri);
		uri = getUriWithoutUserId(uri);
		if (enforceWritePermission(callingPkg, uri) != AppOpsManager.MODE_ALLOWED) {
		return rejectInsert(uri, initialValues);
		@@ -233,7 +239,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {

		@Override
		public int bulkInsert(String callingPkg, Uri uri, ContentValues[] initialValues) {
		getAndEnforceUserId(uri);
		validateIncomingUri(uri);
		uri = getUriWithoutUserId(uri);
		if (enforceWritePermission(callingPkg, uri) != AppOpsManager.MODE_ALLOWED) {
		return 0;
		@@ -254,20 +260,22 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
		final int[] userIds = new int[numOperations];
		for (int i = 0; i < numOperations; i++) {
		ContentProviderOperation operation = operations.get(i);
		userIds[i] = getAndEnforceUserId(operation.getUri());
		Uri uri = operation.getUri();
		validateIncomingUri(uri);
		userIds[i] = getUserIdFromUri(uri);
		if (userIds[i] != UserHandle.USER_CURRENT) {
		// Removing the user id from the uri.
		operation = new ContentProviderOperation(operation, true);
		operations.set(i, operation);
		}
		if (operation.isReadOperation()) {
		if (enforceReadPermission(callingPkg, operation.getUri())
		if (enforceReadPermission(callingPkg, uri)
		!= AppOpsManager.MODE_ALLOWED) {
		throw new OperationApplicationException("App op not allowed", 0);
		}
		}
		if (operation.isWriteOperation()) {
		if (enforceWritePermission(callingPkg, operation.getUri())
		if (enforceWritePermission(callingPkg, uri)
		!= AppOpsManager.MODE_ALLOWED) {
		throw new OperationApplicationException("App op not allowed", 0);
		}
		@@ -290,7 +298,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {

		@Override
		public int delete(String callingPkg, Uri uri, String selection, String[] selectionArgs) {
		getAndEnforceUserId(uri);
		validateIncomingUri(uri);
		uri = getUriWithoutUserId(uri);
		if (enforceWritePermission(callingPkg, uri) != AppOpsManager.MODE_ALLOWED) {
		return 0;
		@@ -306,7 +314,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
		@Override
		public int update(String callingPkg, Uri uri, ContentValues values, String selection,
		String[] selectionArgs) {
		getAndEnforceUserId(uri);
		validateIncomingUri(uri);
		uri = getUriWithoutUserId(uri);
		if (enforceWritePermission(callingPkg, uri) != AppOpsManager.MODE_ALLOWED) {
		return 0;
		@@ -323,7 +331,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
		public ParcelFileDescriptor openFile(
		String callingPkg, Uri uri, String mode, ICancellationSignal cancellationSignal)
		throws FileNotFoundException {
		getAndEnforceUserId(uri);
		validateIncomingUri(uri);
		uri = getUriWithoutUserId(uri);
		enforceFilePermission(callingPkg, uri, mode);
		final String original = setCallingPackage(callingPkg);
		@@ -339,7 +347,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
		public AssetFileDescriptor openAssetFile(
		String callingPkg, Uri uri, String mode, ICancellationSignal cancellationSignal)
		throws FileNotFoundException {
		getAndEnforceUserId(uri);
		validateIncomingUri(uri);
		uri = getUriWithoutUserId(uri);
		enforceFilePermission(callingPkg, uri, mode);
		final String original = setCallingPackage(callingPkg);
		@@ -363,7 +371,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {

		@Override
		public String[] getStreamTypes(Uri uri, String mimeTypeFilter) {
		getAndEnforceUserId(uri);
		validateIncomingUri(uri);
		uri = getUriWithoutUserId(uri);
		return ContentProvider.this.getStreamTypes(uri, mimeTypeFilter);
		}
		@@ -371,7 +379,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
		@Override
		public AssetFileDescriptor openTypedAssetFile(String callingPkg, Uri uri, String mimeType,
		Bundle opts, ICancellationSignal cancellationSignal) throws FileNotFoundException {
		getAndEnforceUserId(uri);
		validateIncomingUri(uri);
		uri = getUriWithoutUserId(uri);
		enforceFilePermission(callingPkg, uri, "r");
		final String original = setCallingPackage(callingPkg);
		@@ -390,7 +398,8 @@ public abstract class ContentProvider implements ComponentCallbacks2 {

		@Override
		public Uri canonicalize(String callingPkg, Uri uri) {
		int userId = getAndEnforceUserId(uri);
		validateIncomingUri(uri);
		int userId = getUserIdFromUri(uri);
		uri = getUriWithoutUserId(uri);
		if (enforceReadPermission(callingPkg, uri) != AppOpsManager.MODE_ALLOWED) {
		return null;
		@@ -405,7 +414,8 @@ public abstract class ContentProvider implements ComponentCallbacks2 {

		@Override
		public Uri uncanonicalize(String callingPkg, Uri uri) {
		int userId = getAndEnforceUserId(uri);
		validateIncomingUri(uri);
		int userId = getUserIdFromUri(uri);
		uri = getUriWithoutUserId(uri);
		if (enforceReadPermission(callingPkg, uri) != AppOpsManager.MODE_ALLOWED) {
		return null;
		@@ -619,6 +629,36 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
		return pkg;
		}

		/**
		* Change the authorities of the ContentProvider.
		* This is normally set for you from its manifest information when the provider is first
		* created.
		* @hide
		* @param authorities the semi-colon separated authorities of the ContentProvider.
		*/
		protected final void setAuthorities(String authorities) {
		if (authorities.indexOf(';') == -1) {
		mAuthority = authorities;
		mAuthorities = null;
		} else {
		mAuthority = null;
		mAuthorities = authorities.split(";");
		}
		}

		/** @hide */
		protected final boolean matchesOurAuthorities(String authority) {
		if (mAuthority != null) {
		return mAuthority.equals(authority);
		}
		int length = mAuthorities.length;
		for (int i = 0; i < length; i++) {
		if (mAuthorities[i].equals(authority)) return true;
		}
		return false;
		}


		/**
		* Change the permission required to read data from the content
		* provider. This is normally set for you from its manifest information
		@@ -1634,6 +1674,7 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
		setWritePermission(info.writePermission);
		setPathPermissions(info.pathPermissions);
		mExported = info.exported;
		setAuthorities(info.authority);
		}
		ContentProvider.this.onCreate();
		}
		@@ -1727,14 +1768,25 @@ public abstract class ContentProvider implements ComponentCallbacks2 {
		public void dump(FileDescriptor fd, PrintWriter writer, String[] args) {
		writer.println("nothing to dump");
		}

		/** @hide */
		private int getAndEnforceUserId(Uri uri) {
		int userId = getUserIdFromUri(uri, UserHandle.USER_CURRENT);
		private void validateIncomingUri(Uri uri) throws SecurityException {
		String auth = uri.getAuthority();
		int userId = getUserIdFromAuthority(auth, UserHandle.USER_CURRENT);
		if (userId != UserHandle.USER_CURRENT && userId != mContext.getUserId()) {
		throw new SecurityException("trying to query a ContentProvider in user "
		+ mContext.getUserId() + " with a uri belonging to user " + userId);
		}
		return userId;
		if (!matchesOurAuthorities(getAuthorityWithoutUserId(auth))) {
		String message = "The authority of the uri " + uri + " does not match the one of the "
		+ "contentProvider: ";
		if (mAuthority != null) {
		message += mAuthority;
		} else {
		message += mAuthorities;
		}
		throw new SecurityException(message);
		}
		}

		/** @hide */