Encrypted external WebDAV storage not working in NC 13.0.3, OCP\Encryption\Exceptions\GenericEncryptionException: Missing Signature #9792
Description
Steps to reproduce
- Enable server side encryption module (Default encryption module)
- Leave all settings at default (external storage encrypted, local storage not encrypted)
- Mount an external WebDAV folder using a normal user, allow sharing for that folder. In my example WebDAV provider is https://webdav.magentacloud.de/
Expected behaviour
Folder should work
Actual behaviour
Upload to the remote folder works, download doesnt work. NC's Error log has lot of entries stating
OCP\Encryption\Exceptions\GenericEncryptionException: Missing Signature (complete error message will be at the end)
Looking directly at the WebDAV storage (using an WebDAV client) reveals that the file was uploaded successfully and is encrypted, but there are no hidden signature files
Server configuration
Operating system:
Linux 2.6.32 x86_64
Web server:
Apache 2.2
Database:
MySQL 5.1.73
PHP version:
7.0.29
Nextcloud version: (see Nextcloud admin page)
13.0.3 (same issue with 13.0.2)
Updated from an older Nextcloud/ownCloud or fresh install:
Updated from 12.x
Where did you install Nextcloud from:
Web based installer https://download.nextcloud.com/server/installer/setup-nextcloud.php
Signing status:
No errors have been found.
Login as admin user into your Nextcloud and access
http://example.com/index.php/settings/integrity/failed
paste the results here.
List of activated apps:
All default + encryption module
If you have access to your command line run e.g.:
sudo -u www-data php occ app:list
from within your Nextcloud installation folder
No sudo (shared host)
Detailled error message:
OCP\Encryption\Exceptions\GenericEncryptionException: Missing Signature
/var/www/virtual/<path>/apps/encryption/lib/Crypto/Crypt.php - line 529: OCA\Encryption\Crypto\Crypt->hasSignature('---------------...', 'AES-256-CTR')
/var/www/virtual/<path>/apps/encryption/lib/Crypto/Crypt.php - line 462: OCA\Encryption\Crypto\Crypt->splitMetaData('---------------...', 'AES-256-CTR')
/var/www/virtual/<path>/apps/encryption/lib/Crypto/Encryption.php - line 380: OCA\Encryption\Crypto\Crypt->symmetricDecryptFileContent('---------------...', 'D\x08!\x8E\x99\x99$\x08`fw\xA8\xDF\xA0H...', 'AES-256-CTR', 1, 0)
/var/www/virtual/<path>/lib/private/Files/Stream/Encryption.php - line 464: OCA\Encryption\Crypto\Encryption->decrypt(*** sensitive parameters replaced ***)
/var/www/virtual/<path>/lib/private/Files/Stream/Encryption.php - line 295: OC\Files\Stream\Encryption->readCache()
[internal function] OC\Files\Stream\Encryption->stream_read(8192)
/var/www/virtual/<path>/apps/files_external/3rdparty/icewind/streams/src/Wrapper.php - line 83: fread(Resource id #55, 8192)
/var/www/virtual/<path>/apps/files_external/3rdparty/icewind/streams/src/CallbackWrapper.php - line 91: Icewind\Streams\Wrapper->stream_read(8192)
[internal function] Icewind\Streams\CallbackWrapper->stream_read(8192)
/var/www/virtual/<path>/3rdparty/sabre/http/lib/Sapi.php - line 80: stream_copy_to_stream(Resource id #58, Resource id #59, '5961980')
/var/www/virtual/<path>/3rdparty/sabre/dav/lib/DAV/Server.php - line 498: Sabre\HTTP\Sapi sendResponse(Object(Sabre\HTTP\Response))
/var/www/virtual/<path>/3rdparty/sabre/dav/lib/DAV/Server.php - line 254: Sabre\DAV\Server->invokeMethod(Object(Sabre\HTTP\Request), Object(Sabre\HTTP\Response))
/var/www/virtual/<path>/apps/dav/lib/Server.php - line 287: Sabre\DAV\Server->exec()
/var/www/virtual/<path>/apps/dav/appinfo/v2/remote.php - line 35: OCA\DAV\Server->exec()
/var/www/virtual/<path>/remote.php - line 164: require_once('/var/www/virtua...')
{main}