Problem with set_passphrase_cb

[crayfishx]

I need to be able to implement gpgme from a systems tool and pass the key password as a string. However, using the password attribute to Ctx.new does not accomplish this. This is the code I'm using...

#!/usr/bin/ruby
#
require 'rubygems'
require 'gpgme'

file = "/tmp/encrypted.gpg"
cipher = File.open(file).read
ctx = GPGME::Ctx.new( { :password => 'foobar' } )
raw = GPGME::Data.new(cipher)
txt = GPGME::Data.new
txt = ctx.decrypt(raw)
txt.seek 0
puts txt

I've walked through the Ruby side of things and it looks like set_passphrase_callback is called correctly with passfunc set to #<Method: GPGME::Ctx.pass_function> and hook_value being the value of my password but the pass_function never gets called. GPGME seems to want to use gpg-agent. Without gpg-agent running I get prompted by GPG for a password, which then works. If I run gpg-agent then it works seamlessly no matter what value I put into :password above.

The problem seems to be on the C side rather than the ruby side, but have you seen this behaviour before? This is gnupg2-2.0.14-4, gpgme-1.1.8-3 with the 2.0.1 gpgme gem on CentOS

A few other notes...

• gpg-agent is not running anywhere
• I have no GPG_* variables set in my environment

Thanks in advance for any help.

[ueno]

Since gnupg2 does all the crypt stuff in gpg-agent, you cannot intercept the passphrase handling.
A work around is to install gnupg1 and set the executable path with GPGME::Engine.set_info.

[joekiller]

It may be helpful to mention that this feature is GPG1 compatible only in the documentation of http://rdoc.info/github/ueno/ruby-gpgme/GPGME/Ctx#set_passphrase_callback-instance_method so that people don't waste their time trying to get it to work. I just happened to stumble upon this issue report and now understand why my code wasn't working for 2 days.

[ueno]

@joekiller thanks, done