[stable10] Backport of Skip shared files when adding recovery key

apps/encryption/lib/Recovery.php

@@ -25,6 +25,7 @@
 namespace OCA\Encryption;
 
 
+use OC\Files\FileInfo;
 use OCA\Encryption\Crypto\Crypt;
 use OCP\Encryption\Keys\IStorage;
 use OCP\IConfig;
@@ -220,6 +221,9 @@ public function setRecoveryForUser($value) {
 	private function addRecoveryKeys($path) {
 		$dirContent = $this->view->getDirectoryContent($path);
 		foreach ($dirContent as $item) {
+			if ($this->isSharedStorage($item)) {
+				continue;
+			}
 			$filePath = $item->getPath();
 			if ($item['type'] === 'dir') {
 				$this->addRecoveryKeys($filePath . '/');
@@ -248,6 +252,9 @@ private function addRecoveryKeys($path) {
 	private function removeRecoveryKeys($path) {
 		$dirContent = $this->view->getDirectoryContent($path);
 		foreach ($dirContent as $item) {
+			if ($this->isSharedStorage($item)) {
+				continue;
+			}
 			$filePath = $item->getPath();
 			if ($item['type'] === 'dir') {
 				$this->removeRecoveryKeys($filePath . '/');
@@ -326,5 +333,21 @@ private function recoverFile($path, $privateKey, $uid) {
 
 	}
 
-
+	/**
+	 * check if the item is on a shared storage
+	 *
+	 * @param FileInfo $item
+	 * @return bool
+	 */
+	protected function isSharedStorage(FileInfo $item) {
+		/**
+		 * hardcoded class to prevent dependency on files_sharing app and federated share
+		 * TODO: add filter callback to view::getDirectoryContent() or its successor
+		 * so we can filter by more than just mimetype
+		 */
+		if ($item->getStorage()->instanceOfStorage('OCA\Files_Sharing\ISharedStorage')) {
+			return true;
+		}
+		return false;
+	}
 }

apps/encryption/tests/RecoveryTest.php

@@ -27,7 +27,13 @@
 namespace OCA\Encryption\Tests;
 
 
+use OC\Files\FileInfo;
+use OC\Files\Mount\MountPoint;
 use OCA\Encryption\Recovery;
+use OCA\Files_Sharing\ISharedStorage;
+use OCP\Files\Cache\ICacheEntry;
+use OCP\Files\Storage\IStorage;
+use OCP\IUser;
 use Test\TestCase;
 
 class RecoveryTest extends TestCase {
@@ -244,6 +250,27 @@ public function testRecoverFile() {
 			['/', 'testkey', 'admin']));
 	}
 
+	public function testNormalShareOrFedShareRecoveryKeySkipped() {
+		$storage = $this->createMock(IStorage::class);
+		$storage->method('instanceOfStorage')
+			->with(ISharedStorage::class)
+			->willReturn(true);
+
+		$cacheEntry = $this->createMock(ICacheEntry::class);
+		$mountPoint = $this->createMock(MountPoint::class);
+		$mountPoint->method('getStorage')
+			->willReturn($storage);
+
+		$user = $this->createMock(IUser::class);
+		$remoteUser = $this->createMock(IUser::class);
+		$normalShare = new FileInfo('test/files/foo', $storage, '', $cacheEntry, $mountPoint, $user);
+		$fedShare = new FileInfo('test/files/fedshare', $storage, '', $cacheEntry, $mountPoint, $remoteUser);
+
+		$this->viewMock->method('getDirectoryContent')
+			->willReturn([$normalShare, $fedShare]);
+		$this->assertEquals(true, $this->instance->setRecoveryForUser('1'));
+	}
+
 	protected function setUp() {
 		parent::setUp();