GnuPG home directory - gnupg

Question

The following is the code that I have been trying.
import os
import gnupg
import pdb
pdb.set_trace()
gpg = gnupg.GPG(gnupghome='new')
input_data = gpg.gen_key_input(
key_type="RSA",key_length=1024,
passphrase='mounika')
key = gpg.gen_key(input_data)
with open(local.txt,'rb')as f:
status=gpg.encrypt_file(f)
And the following is the error message being generated.
C:\Python27\python.exe C:/SAAS/encrypt.py
Traceback (most recent call last):
File "C:/SAAS/encrypt.py", line 4, in <module>
gpg = gnupg.GPG(gnupghome='new')
File "C:\Python27\lib\site-packages\gnupg.py", line 755, in __init__
raise OSError(msg)
OSError: Unable to run gpg - it may not be available.
Process finished with exit code 1
I am fairly new to GnuPG and after doing a bit of research I tried replacing gnupghome with homedir. But this is raising another error that homedir is an unexpected keyword.Can soneone pls help me with this issue. Any help would be appreciated.

Answer 1

You need to install the gpg program and make sure it is in your PATH. Or provide the full path to the gpg binary in your constructor, like
gpg = gnupg.GPG(gnupghome='new', gpgbinary='C:\\path\\to\\GnuPG\\pub\\gpg.exe')
Check also the Deployment Requirements for the python-gnupg package for more info.

Answer 2

As i encountered, the main reason is your local machine or server doesn't have gnupg package, so you need to install it with apt or whatever your package manager is. That could solve the problem.

Answer 3

in the latest version(2.2.0) of python-gnupg(imported as gnupg),
gnupghome=homedir(where the keyring etc is stored).
A few other things:
Binaries(in windows, that's the exe file) are defined as 'binary'.
best to specify a fingerprint, perhaps your local.txt should be a string('local.txt'),
and I think you're using the saltycrane blog post which is a little outdated at the moment.
So the below should work(OP code refactored):
import os
import gnupg
import pdb
pdb.set_trace()
gpg = gnupg.GPG(homedir='new',
binary="C:/Progra~2/GNU/GnuPG/pub/gpg2.exe")
input_data = gpg.gen_key_input(
key_type="RSA",key_length=1024,
passphrase='mounika')
key = gpg.gen_key(input_data)
with open(local.txt,'rb')as f:
status=gpg.encrypt(f, key.fingerprint)
print status.ok
print status.status
print status.stderr
I reckon your code is just failing silently.