Change to support re-create masterkeys

This change supports a new command to re-create
masterkey

Signed-off-by: Sujith H <sharidasan@owncloud.com>

lib/private/Files/Storage/Wrapper/Encryption.php

@@ -201,16 +201,18 @@ public function getMetaData($path) {
 	 */
 	public function file_get_contents($path) {
 
-		$encryptionModule = $this->getEncryptionModule($path);
+		if ( \OC::$server->getAppConfig()->getValue('encryption', 'enabled', false) !== false) {
+			$encryptionModule = $this->getEncryptionModule($path);
 
-		if ($encryptionModule) {
-			$handle = $this->fopen($path, "r");
-			if (!$handle) {
-				return false;
+			if ($encryptionModule) {
+				$handle = $this->fopen($path, "r");
+				if (!$handle) {
+					return false;
+				}
+				$data = stream_get_contents($handle);
+				fclose($handle);
+				return $data;
 			}
-			$data = stream_get_contents($handle);
-			fclose($handle);
-			return $data;
 		}
 		return $this->storage->file_get_contents($path);
 	}
@@ -379,6 +381,8 @@ public function fopen($path, $mode) {
 		$signed = (isset($header['signed']) && $header['signed'] === 'true') ? true : false;
 		$fullPath = $this->getFullPath($path);
 		$encryptionModuleId = $this->util->getEncryptionModuleId($header);
+		$createDecryptedFile = false;
+		$readNormalFile = false;
 
 		if ($this->util->isExcluded($fullPath) === false) {
 
@@ -420,6 +424,9 @@ public function fopen($path, $mode) {
 						$encryptionModule = $this->encryptionManager->getEncryptionModule($encryptionModuleId);
 						$shouldEncrypt = $encryptionModule->shouldEncrypt($fullPath);
 						$signed = true;
+						if (\OC::$server->getSession()->get('decryptAllCmd') === true) {
+							$createDecryptedFile = true;
+						}
 					}
 				} else {
 					$info = $this->getCache()->get($path);
@@ -436,6 +443,9 @@ public function fopen($path, $mode) {
 						$shouldEncrypt = true;
 						$targetIsEncrypted = true;
 					}
+					if ( \OC::$server->getSession()->get('encryptAllCmd') === true) {
+						$readNormalFile = true;
+					}
 				}
 			} catch (ModuleDoesNotExistsException $e) {
 				$this->logger->warning('Encryption module "' . $encryptionModuleId .
@@ -450,6 +460,9 @@ public function fopen($path, $mode) {
 			}
 
 			if ($shouldEncrypt === true && $encryptionModule !== null) {
+				if (($createDecryptedFile === true) || ($readNormalFile === true)) {
+					return $this->storage->fopen($path, $mode);
+				}
 				$headerSize = $this->getHeaderSize($path);
 				$source = $this->storage->fopen($path, $mode);
 				if (!is_resource($source)) {
@@ -672,6 +685,9 @@ private function updateEncryptedVersion(Storage $sourceStorage, $sourceInternalP
 		// in case of a rename we need to manipulate the source cache because
 		// this information will be kept for the new target
 		if ($isRename) {
+			$encryptedVersion = 1;
+			$cacheInformation['encryptedVersion'] = $encryptedVersion;
+
 			$sourceStorage->getCache()->put($sourceInternalPath, $cacheInformation);
 		} else {
 			$this->getCache()->put($targetInternalPath, $cacheInformation);