Flask application not finding GnuPG
I’m interfacing gpg in a flask application with python-gnupg. The module is installed in a virtualenv together with the rest of my application. When running I receive a 500 internal server error, and the exception is:
File "./myproject/views/settings.py", line 257, in settings_keys_add gpg = gnupg.GPG() File "/home/puse/myproject/myproject/lib/python3.5/site-packages/gnupg.py", line 733, in __init__ p = self._open_subprocess(["--version"]) File "/home/puse/myproject/myproject/lib/python3.5/site-packages/gnupg.py", line 786, in _open_subprocess startupinfo=si) File "/usr/lib/python3.5/subprocess.py", line 947, in __init__ restore_signals, start_new_session) File "/usr/lib/python3.5/subprocess.py", line 1551, in _execute_child raise child_exception_type(errno_num, err_msg) FileNotFoundError: [Errno 2] No such file or directory: 'gpg'
gpg is installed and is working:
puse@puse ~/puse> which gpg /usr/bin/gpg puse@puse ~/puse> gpg --gen-key gpg (GnuPG) 1.4.20; Copyright (C) 2015 Free Software Foundation, Inc. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Please select what kind of key you want: (1) RSA and RSA (default) (2) DSA and Elgamal (3) DSA (sign only) (4) RSA (sign only) Your selection? gpg: Interrupt caught ... exiting
I can also get it to work from python within the virtualenv:
Python 3.5.2 (default, Jul 5 2016, 12:43:10) [GCC 5.4.0 20160609] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import gnupg >>> gpg = gnupg.GPG() >>> a = gpg.scan_keys("/opt/keys/2a798434-ebb3-4dc6-9f76-fd46f0cce6fa")
I suspect it has something to do with what user the application is running under, but the application is running under my user, but with group set to www-data. I have confirmed this by running ps.
[Service] User=puse Group=www-data