Merge pull request #35961 from nextcloud/move-from-encryption-remove-flag

clear encrypted flag when moving away from encrypted storage

3 files changed, 116 insertions, 0 deletions

diff --git a/apps/encryption/tests/EncryptedStorageTest.php b/apps/encryption/tests/EncryptedStorageTest.php
new file mode 100644
index 00000000000..3219707d48b
--- /dev/null
+++ b/apps/encryption/tests/EncryptedStorageTest.php
@@ -0,0 +1,85 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2023 Robin Appelman <robin@icewind.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\encryption\tests;
+
+use OC\Files\Storage\Temporary;
+use OC\Files\Storage\Wrapper\Encryption;
+use OC\Files\View;
+use OCP\Files\Mount\IMountManager;
+use OCP\Files\Storage\IDisableEncryptionStorage;
+use Test\TestCase;
+use Test\Traits\EncryptionTrait;
+use Test\Traits\MountProviderTrait;
+use Test\Traits\UserTrait;
+
+class TemporaryNoEncrypted extends Temporary implements IDisableEncryptionStorage {
+
+}
+
+/**
+ * @group DB
+ */
+class EncryptedStorageTest extends TestCase {
+	use MountProviderTrait;
+	use EncryptionTrait;
+	use UserTrait;
+
+	public function testMoveFromEncrypted() {
+		$this->createUser("test1", "test2");
+		$this->setupForUser("test1", 'test2');
+
+		$unwrapped = new Temporary();
+
+		$this->registerMount("test1", new TemporaryNoEncrypted(), "/test1/files/unenc");
+		$this->registerMount("test1", $unwrapped, "/test1/files/enc");
+
+		$this->loginWithEncryption("test1");
+
+		$view = new View("/test1/files");
+
+		/** @var IMountManager $mountManager */
+		$mountManager = \OC::$server->get(IMountManager::class);
+
+		$encryptedMount = $mountManager->find("/test1/files/enc");
+		$unencryptedMount = $mountManager->find("/test1/files/unenc");
+		$encryptedStorage = $encryptedMount->getStorage();
+		$unencryptedStorage = $unencryptedMount->getStorage();
+		$encryptedCache = $encryptedStorage->getCache();
+		$unencryptedCache = $unencryptedStorage->getCache();
+
+		$this->assertTrue($encryptedStorage->instanceOfStorage(Encryption::class));
+		$this->assertFalse($unencryptedStorage->instanceOfStorage(Encryption::class));
+
+		$encryptedStorage->file_put_contents("foo.txt", "bar");
+		$this->assertEquals("bar", $encryptedStorage->file_get_contents("foo.txt"));
+		$this->assertStringStartsWith("HBEGIN:oc_encryption_module:", $unwrapped->file_get_contents("foo.txt"));
+
+		$this->assertTrue($encryptedCache->get("foo.txt")->isEncrypted());
+
+		$view->rename("enc/foo.txt", "unenc/foo.txt");
+
+		$this->assertEquals("bar", $unencryptedStorage->file_get_contents("foo.txt"));
+		$this->assertFalse($unencryptedCache->get("foo.txt")->isEncrypted());
+	}
+}
diff --git a/lib/private/Files/Cache/Cache.php b/lib/private/Files/Cache/Cache.php
index 9afeea7b573..afa464a8138 100644
--- a/lib/private/Files/Cache/Cache.php
+++ b/lib/private/Files/Cache/Cache.php
@@ -43,6 +43,7 @@ namespace OC\Files\Cache;
 use Doctrine\DBAL\Exception\UniqueConstraintViolationException;
 use OC\Files\Search\SearchComparison;
 use OC\Files\Search\SearchQuery;
+use OC\Files\Storage\Wrapper\Encryption;
 use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\Files\Cache\CacheEntryInsertedEvent;
@@ -659,6 +660,10 @@ class Cache implements ICache {
 		return [$this->getNumericStorageId(), $path];
 	}
 
+	protected function hasEncryptionWrapper(): bool {
+		return $this->storage->instanceOfStorage(Encryption::class);
+	}
+
 	/**
 	 * Move a file or folder in the cache
 	 *
@@ -710,6 +715,11 @@ class Cache implements ICache {
 					->where($query->expr()->eq('storage', $query->createNamedParameter($sourceStorageId, IQueryBuilder::PARAM_INT)))
 					->andWhere($query->expr()->like('path', $query->createNamedParameter($this->connection->escapeLikeParameter($sourcePath) . '/%')));
 
+				// when moving from an encrypted storage to a non-encrypted storage remove the `encrypted` mark
+				if ($sourceCache->hasEncryptionWrapper() && !$this->hasEncryptionWrapper()) {
+					$query->set('encrypted', $query->createNamedParameter(0, IQueryBuilder::PARAM_INT));
+				}
+
 				try {
 					$query->execute();
 				} catch (\OC\DatabaseException $e) {
@@ -726,6 +736,12 @@ class Cache implements ICache {
 				->set('name', $query->createNamedParameter(basename($targetPath)))
 				->set('parent', $query->createNamedParameter($newParentId, IQueryBuilder::PARAM_INT))
 				->whereFileId($sourceId);
+
+			// when moving from an encrypted storage to a non-encrypted storage remove the `encrypted` mark
+			if ($sourceCache->hasEncryptionWrapper() && !$this->hasEncryptionWrapper()) {
+				$query->set('encrypted', $query->createNamedParameter(0, IQueryBuilder::PARAM_INT));
+			}
+
 			$query->execute();
 
 			$this->connection->commit();
@@ -1085,6 +1101,12 @@ class Cache implements ICache {
 			throw new \RuntimeException("Invalid source cache entry on copyFromCache");
 		}
 		$data = $this->cacheEntryToArray($sourceEntry);
+
+		// when moving from an encrypted storage to a non-encrypted storage remove the `encrypted` mark
+		if ($sourceCache instanceof Cache && $sourceCache->hasEncryptionWrapper() && !$this->hasEncryptionWrapper()) {
+			$data['encrypted'] = 0;
+		}
+
 		$fileId = $this->put($targetPath, $data);
 		if ($fileId <= 0) {
 			throw new \RuntimeException("Failed to copy to " . $targetPath . " from cache with source data " . json_encode($data) . " ");
diff --git a/lib/private/Files/Cache/Wrapper/CacheWrapper.php b/lib/private/Files/Cache/Wrapper/CacheWrapper.php
index 66ae83fd144..2cd378ad23c 100644
--- a/lib/private/Files/Cache/Wrapper/CacheWrapper.php
+++ b/lib/private/Files/Cache/Wrapper/CacheWrapper.php
@@ -56,6 +56,15 @@ class CacheWrapper extends Cache {
 		return $this->cache;
 	}
 
+	protected function hasEncryptionWrapper(): bool {
+		$cache = $this->getCache();
+		if ($cache instanceof Cache) {
+			return $cache->hasEncryptionWrapper();
+		} else {
+			return false;
+		}
+	}
+
 	/**
 	 * Make it easy for wrappers to modify every returned cache entry
 	 *