From: Daiki Ueno <ueno@...>
Date: 2010-01-17T22:19:33+09:00
Subject: Re: GPGME gem - cannot figure out how to decrypt data

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Daiki Ueno <ueno@unixuser.org> writes:

> Could you try the attached script, which decrypts a file specified as
> the first command line argument?

Sorry, I mistakenly posted a wrong script.  Please use this one instead...


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Content-Type: application/x-ruby
Content-Disposition: attachment; filename=decrypt.rb

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

# If you do not have gpg-agent installed, comment out the following
# and set it as :passphrase_callback.
#
def passfunc(hook, uid_hint, passphrase_info, prev_was_bad, fd)
  $stderr.write("Passphrase for #{uid_hint}: ")
  $stderr.flush
  begin
    system('stty -echo')
    io = IO.for_fd(fd, 'w')
    io.puts($stdin.gets)
    io.flush
  ensure
    (0 ... $_.length).each do |i| $_[i] = ?0 end if $_
    system('stty echo')
  end
  $stderr.puts
end

plain = GPGME::decrypt(ARGF, {
			 :passphrase_callback => method(:passfunc)
		       })
puts("Plaintext:\n#{plain}")

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Don't forget to do "unset GPG_AGENT_INFO" before running it, to let
GPGME ignore gpg-agent.

Regards,
-- 
Daiki Ueno

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