From 0f8fe77b3a7be660e78079bc987bb851b30b576c Mon Sep 17 00:00:00 2001
From: Bjoern Schiessle <bjoern@schiessle.org>
Date: Tue, 29 Nov 2016 16:27:28 +0100
Subject: check if the file should really be encrypted before we update the
 file cache

Signed-off-by: Bjoern Schiessle <bjoern@schiessle.org>
---
 lib/private/Files/Storage/Wrapper/Encryption.php | 32 ++++++++++++++++++++++--
 1 file changed, 30 insertions(+), 2 deletions(-)

(limited to 'lib/private')

diff --git a/lib/private/Files/Storage/Wrapper/Encryption.php b/lib/private/Files/Storage/Wrapper/Encryption.php
index 8531ccc0dd0..c0ccd22d147 100644
--- a/lib/private/Files/Storage/Wrapper/Encryption.php
+++ b/lib/private/Files/Storage/Wrapper/Encryption.php
@@ -444,7 +444,7 @@ class Encryption extends Wrapper {
 			}
 
 			// encryption disabled on write of new file and write to existing unencrypted file -> don't encrypt
-			if (!$encryptionEnabled || !$this->mount->getOption('encrypt', true)) {
+			if (!$encryptionEnabled || !$this->shouldEncrypt($path)) {
 				if (!$targetExists || !$targetIsEncrypted) {
 					$shouldEncrypt = false;
 				}
@@ -651,7 +651,7 @@ class Encryption extends Wrapper {
 	 * @param bool $isRename
 	 */
 	private function updateEncryptedVersion(Storage $sourceStorage, $sourceInternalPath, $targetInternalPath, $isRename) {
-		$isEncrypted = $this->encryptionManager->isEnabled() && $this->mount->getOption('encrypt', true) ? 1 : 0;
+		$isEncrypted = $this->encryptionManager->isEnabled() && $this->shouldEncrypt($targetInternalPath) ? 1 : 0;
 		$cacheInformation = [
 			'encrypted' => (bool)$isEncrypted,
 		];
@@ -954,6 +954,7 @@ class Encryption extends Wrapper {
 				throw $e;
 			}
 		}
+
 		return $encryptionModule;
 	}
 
@@ -991,4 +992,31 @@ class Encryption extends Wrapper {
 		return substr($normalized, 0, strlen('/files_versions/')) === '/files_versions/';
 	}
 
+	/**
+	 * check if the given storage should be encrypted or not
+	 *
+	 * @param $path
+	 * @return bool
+	 */
+	protected function shouldEncrypt($path) {
+		$fullPath = $this->getFullPath($path);
+		$mountPointConfig = $this->mount->getOption('encrypt', true);
+		if ($mountPointConfig === false) {
+			return false;
+		}
+
+		try {
+			$encryptionModule = $this->getEncryptionModule($fullPath);
+		} catch (ModuleDoesNotExistsException $e) {
+			return false;
+		}
+
+		if ($encryptionModule === null) {
+			$encryptionModule = $this->encryptionManager->getEncryptionModule();
+		}
+
+		return $encryptionModule->shouldEncrypt($fullPath);
+
+	}
+
 }
-- 
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