only encrypt file to users with encryption keys

apps/files_encryption/hooks/hooks.php

@@ -92,8 +92,6 @@ class Hooks {
 			}
 
 			// Encrypt existing user files:
-			// This serves to upgrade old versions of the encryption
-			// app (see appinfo/spec.txt)
 			if (
 				$util->encryptAll('/' . $params['uid'] . '/' . 'files', $session->getLegacyKey(), $params['password'])
 			) {

apps/files_encryption/lib/stream.php

@@ -506,9 +506,10 @@ class Stream {
 
 				// Get all users sharing the file includes current user
 				$uniqueUserIds = $util->getSharingUsersArray($sharingEnabled, $this->relPath, $this->userId);
+				$checkedUserIds = $util->filterShareReadyUsers($uniqueUserIds);
 
 				// Fetch public keys for all sharing users
-				$publicKeys = Keymanager::getPublicKeys($this->rootView, $uniqueUserIds);
+				$publicKeys = Keymanager::getPublicKeys($this->rootView, $checkedUserIds['ready']);
 
 				// Encrypt enc key for all sharing users
 				$this->encKeyfiles = Crypt::multiKeyEncrypt($this->plainKey, $publicKeys);