Bad Signature: Decrypting files

encryption
nc13
#1

Nextcloud version: 13.0.2
Operating system and version: 16.04.1-Ubuntu
Apache or nginx version : Apache/2.4.18
PHP version: 7.0.28

The issue you are facing:
I had a problem with few files, dunno how it came to it but the error said Bad Signature. I already planned to decrypt my data and know it seems like all of my files are rip. I think I have all the stuff I need to decrypt the data but don’t know how.

I’m gettin OCP\Encryption\Exceptions\GenericEncryptionException: Bad Signature and

Uncaught Error: Access to undeclared static property: OC\Files\Filesystem::$normalizedPathCache in /var/www/cloud/public_html/lib/private/Files/Filesystem.php:796 Stack trace: #0 /var/www/cloud/public_html/lib/private/Files/View.php(2057): OC\Files\Filesystem::normalizePath('/zInvalid/files...') #1 /var/www/cloud/public_html/lib/private/Files/View.php(1182): OC\Files\View->unlockFile('/ts3server', 1) #2 [internal function]: OC\Files\View->OC\Files\{closure}() #3 /var/www/cloud/public_html/3rdparty/icewind/streams/src/CallbackWrapper.php(109): call_user_func(Object(Closure)) #4 [internal function]: Icewind\Streams\CallbackWrapper->stream_close() #5 {main} thrown at /var/www/cloud/public_html/lib/private/Files/Filesystem.php#796

Is this the first time you’ve seen this error? (Y/N): Y

Hope you can help me, really need that data back.

#2

The signature uses data from your database. So typically, you get this error, when you restore files with a database which is different to the time when the file was encrypted.

Here is a hint from the developer, how you can disable the signature verification (someone could have altered your file, but still better than to lose your data):

Decrypt encrypted datas.. Need your help!.. (Without database)
#3

I think the files are already rip, first I ran the command decrypt-all without entering the masterkeys password. This took a while but didn’t decrypt then I read somewhere there’s a bug.Now always when I try the command decrypt-all it takes seconds and not even all files are displayed. Does this mean the files aren’t in the database anymore or sth. like that?

#4

same issue with me, similar config… is there a fix ?