1 files changed, 17 insertions, 1 deletions
diff --git a/apps/encryption/lib/crypto/encryption.php b/apps/encryption/lib/crypto/encryption.php
index 4e181b0712a..29fda09e87f 100644
--- a/apps/encryption/lib/crypto/encryption.php
+++ b/apps/encryption/lib/crypto/encryption.php
@@ -25,6 +25,7 @@
 namespace OCA\Encryption\Crypto;
 
 
+use OCA\Encryption\Exceptions\PublicKeyMissingException;
 use OCA\Encryption\Util;
 use OCP\Encryption\IEncryptionModule;
 use OCA\Encryption\KeyManager;
@@ -67,6 +68,7 @@ class Encryption implements IEncryptionModule {
 	/** @var Util */
 	private $util;
 
+
 	/** @var  ILogger */
 	private $logger;
 
@@ -161,6 +163,9 @@ class Encryption implements IEncryptionModule {
 	 * @param string $path to the file
 	 * @return string remained data which should be written to the file in case
 	 *                of a write operation
+	 * @throws PublicKeyMissingException
+	 * @throws \Exception
+	 * @throws \OCA\Encryption\Exceptions\MultiKeyEncryptException
 	 */
 	public function end($path) {
 		$result = '';
@@ -171,7 +176,18 @@ class Encryption implements IEncryptionModule {
 			}
 			$publicKeys = array();
 			foreach ($this->accessList['users'] as $uid) {
-				$publicKeys[$uid] = $this->keyManager->getPublicKey($uid);
+				try {
+					$publicKeys[$uid] = $this->keyManager->getPublicKey($uid);
+				} catch (PublicKeyMissingException $e) {
+					$this->logger->warning(
+						'no public key found for user "{uid}", user will not be able to read the file',
+						['app' => 'encryption', 'uid' => $uid]
+					);
+					// if the public key of the owner is missing we should fail
+					if ($uid === $this->user) {
+						throw $e;
+					}
+				}
 			}
 
 			$publicKeys = $this->keyManager->addSystemKeys($this->accessList, $publicKeys);