Invalid Crypto Engine - ( Xubuntu 18.04 ) version of GPG4USB 0.3.3.2 & 0.3.3.1
Closed, InvalidPublic

Description

I installed (and use daily) GPG4USB, it's a GUI for GPG, encrypt, unencrypt, sign, verify and others tasks. (manage keys)
https://www.gpg4usb.org/

The issue started when I updated Xubuntu from 16.04 to 18.04
I tested
./start_linux_32bits
./start_linux_64bits

with latest version of gpg4usb (0.3.3.2) and with 0.3.3.1

./start_linux_64bit

[Error] Source:  GPGME  String:  "Invalid crypto engine" 
[Error] Source:  GPGME  String:  "Invalid crypto engine" 
[Error] Source:  GPGME  String:  "Invalid crypto engine"

could be related to GPGME, and how gpg4usb interact with it.

Xubuntu is updated

ii gpg 2.2.4-1ubuntu1 amd64 GNU Privacy Guard -- minimalist public key operations
ii gpg-agent 2.2.4-1ubuntu1 amd64 GNU privacy guard - cryptographic agent
ii gpg-wks-client 2.2.4-1ubuntu1 amd64 GNU privacy guard - Web Key Service client
ii gpg-wks-server 2.2.4-1ubuntu1 amd64 GNU privacy guard - Web Key Service server
ii gpgconf 2.2.4-1ubuntu1 amd64 GNU privacy guard - core configuration utilities
ii gpgsm 2.2.4-1ubuntu1 amd64 GNU privacy guard - S/MIME version
ii gpgv 2.2.4-1ubuntu1 amd64 GNU privacy guard - signature verification tool
ii libgpg-error0:amd64 1.27-6 amd64 library for common error values and messages in GnuPG components
ii libgpg-error0:i386 1.27-6 i386 library for common error values and messages in GnuPG components
ii libgpgme11:amd64 1.10.0-1ubuntu1 amd64 GPGME - GnuPG Made Easy (library)
ii libgpgmepp6:amd64 1.10.0-1ubuntu1 amd64 C++ wrapper library for GPGME

werner closed this task as Invalid.May 4 2018, 10:55 AM
werner added a subscriber: werner.

This bug tracker does not support gpg4usb - please use their bug tracker.

aheinecke reopened this task as Open.EditedMay 4 2018, 6:24 PM
aheinecke claimed this task.
aheinecke triaged this task as Normal priority.
aheinecke added a project: gpgme.
aheinecke added a subscriber: aheinecke.

I'll volunteer to look into it. IMO "Invalid Crypto Engine" points definitely to a GPGME bug and I want to know whats going on there.

I have an Ubuntu 18.04 VM at hand anyway.

aheinecke closed this task as Invalid.May 4 2018, 6:42 PM

OOooh yeee.
Ok. Didn't know how bad gpg4usb really is.
I looked into it. Gpg4usb distributes their own binary GPGME version https://github.com/gpg4usb/gpg4usb/tree/master/linbuild/lib I don't even know which version that is. They are in violation of the GPL as they don't offer the source code of that GPGME version.

So, don't use it please what they do is horrible from a security standpoint. Try using Kleopatra (which I personally maintain). And if it does not work for your use case please let us know what your use case is and we can try to make it better for you. :-)

But indeed for gpg4usb you can't expect help here. They are very likely shipping a horribly outdated version with bugs that have since been fixed.

werner added a comment.May 4 2018, 7:36 PM

It seems to be 1.1.6 from 2010 or so. They use gpg 1.4.20 which misses a critical security fix.

BenM added a subscriber: BenM.May 5 2018, 5:27 AM

I suspect gpg4usb is a dead project anyway. I've been on their mailing list for a while and according to my records the last post from the pseudonymous author(s) is from October, 2016. I'm not sure how much of that GPL breach is intentional or just a result of web services going offline and not being restored.

Still, their domain is registered to a contact in Niedersachsen, so you can probably look a little closer than I can.

I 'll try GPA and Kleopatra, I hope will do the same tasks.
thanks anyway.

OOooh yeee.
Ok. Didn't know how bad gpg4usb really is.
I looked into it. Gpg4usb distributes their own binary GPGME version https://github.com/gpg4usb/gpg4usb/tree/master/linbuild/lib I don't even know which version that is. They are in violation of the GPL as they don't offer the source code of that GPGME version.

So, don't use it please what they do is horrible from a security standpoint. Try using Kleopatra (which I personally maintain). And if it does not work for your use case please let us know what your use case is and we can try to make it better for you. :-)

But indeed for gpg4usb you can't expect help here. They are very likely shipping a horribly outdated version with bugs that have since been fixed.

Im using Kleopatra and GPA now, I have to learn a bit because some simple tasks are not really easy for a daily usage.
For examply, encrypt a text using the same keys.
Anyway, thanks

The latest Version of Kleopatra has a "Notepad" View that should do what you want. E.g. If you decrypt something in there it preselects the keys the message was encrypted to when you encrypt it again.

Looks like this: http://files.intevation.de/users/aheinecke/notepad.gif

I packaged Kleopatra and the latest GnuPG for Ubuntu 18.04 last week. If you want you can:

sudo -s
 echo "deb http://apt.intevation.de bionic gnupg-kleopatra" > \
     /etc/apt/sources.list.d/gnupg-kleopatra.list
 wget -O - https://ssl.intevation.de/Intevation-Distribution-Key.asc | apt-key add -
 apt-get update
 apt-get install kleopatra
 apt-get dist-upgrade -y

I downloaded it and I' m using it.
Nice feature the "notepad".... easier for encrypt/sign.

Can' t define the Standard Key to use. still learning

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