From fef75e5417206fcc36d979022f0f9921a743a3ae Mon Sep 17 00:00:00 2001
From: Bjoern Schiessle <schiessle@owncloud.com>
Date: Fri, 22 May 2015 12:12:31 +0200
Subject: remove part file extension before we read a filekey to reuse a
 existing key if possible, otherwise stuff like versioning will break

---
 lib/private/encryption/keys/storage.php |  3 ++-
 tests/lib/encryption/keys/storage.php   |  4 +++-
 tests/lib/encryption/utiltest.php       | 20 ++++++++++++++++++++
 3 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/lib/private/encryption/keys/storage.php b/lib/private/encryption/keys/storage.php
index 6aa00c5b5ee..f90548fd319 100644
--- a/lib/private/encryption/keys/storage.php
+++ b/lib/private/encryption/keys/storage.php
@@ -70,7 +70,8 @@ class Storage implements IStorage {
 	 * @inheritdoc
 	 */
 	public function getFileKey($path, $keyId, $encryptionModuleId) {
-		$keyDir = $this->getFileKeyDir($encryptionModuleId, $path);
+		$realFile = $this->util->stripPartialFileExtension($path);
+		$keyDir = $this->getFileKeyDir($encryptionModuleId, $realFile);
 		return $this->getKey($keyDir . $keyId);
 	}
 
diff --git a/tests/lib/encryption/keys/storage.php b/tests/lib/encryption/keys/storage.php
index e67103fb6aa..fa623ac1c1b 100644
--- a/tests/lib/encryption/keys/storage.php
+++ b/tests/lib/encryption/keys/storage.php
@@ -76,7 +76,9 @@ class StorageTest extends TestCase {
 		$this->util->expects($this->any())
 			->method('getUidAndFilename')
 			->willReturn(array('user1', '/files/foo.txt'));
-		$this->util->expects($this->any())
+		// we need to strip away the part file extension in order to reuse a
+		// existing key if it exists, otherwise versions will break
+		$this->util->expects($this->once())
 			->method('stripPartialFileExtension')
 			->willReturnArgument(0);
 		$this->util->expects($this->any())
diff --git a/tests/lib/encryption/utiltest.php b/tests/lib/encryption/utiltest.php
index 0154fa30f7d..d3a4e211daa 100644
--- a/tests/lib/encryption/utiltest.php
+++ b/tests/lib/encryption/utiltest.php
@@ -174,4 +174,24 @@ class UtilTest extends TestCase {
 		);
 	}
 
+	/**
+	 * @dataProvider dataTestStripPartialFileExtension
+	 *
+	 * @param string $path
+	 * @param string $expected
+	 */
+	public function testStripPartialFileExtension($path, $expected) {
+		$this->assertSame($expected,
+			$this->util->stripPartialFileExtension($path));
+	}
+
+	public function dataTestStripPartialFileExtension() {
+		return array(
+			array('/foo/test.txt', '/foo/test.txt'),
+			array('/foo/test.txt.part', '/foo/test.txt'),
+			array('/foo/test.txt.ocTransferId7567846853.part', '/foo/test.txt'),
+			array('/foo/test.txt.ocTransferId7567.part', '/foo/test.txt'),
+		);
+	}
+
 }
-- 
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