Using passphrase callback in ruby gpgme

Question

I am using ruby gpgme gem (1.0.8). My passphrase callback isn\'t called:

def passfunc(*args)
  fd = args.last
  io = IO.for_fd(fd, \'w\')
  io.puts \"mypassp         


        

Answer 1

Here's another working example for you that doesn't use a detached signature. To test this, simply change 'user@host.name' to the identifier of your key and do this: GPG.decrypt(GPG.encrypt('some text', :armor => true))

require 'gpgme'
require 'highline/import'

module GPG
  ENCRYPT_KEY = 'user@host.com'
  @gpg = GPGME::Crypto.new

  class << self

    def decrypt(encrypted_data, options = {})
      options = { :passphrase_callback => self.method(:passfunc) }.merge(options)
      @gpg.decrypt(encrypted_data, options).read 
    end

    def encrypt(data_to_encrypt, options = {})
      options = { :passphrase_callback => self.method(:passfunc), :armor => true }.merge(options)
      @gpg.encrypt(data_to_encrypt, options).read
    end

    private
      def get_passphrase
        ask("Enter passphrase for #{ENCRYPT_KEY}: ") { |q| q.echo = '*' }
      end

      def passfunc(hook, uid_hint, passphrase_info, prev_was_bad, fd)
        begin
          system('stty -echo')
          io = IO.for_fd(fd, 'w')
          io.puts(get_passphrase)
          io.flush
        ensure
          (0 ... $_.length).each do |i| $_[i] = ?0 end if $_
          system('stty echo')
        end
        $stderr.puts
      end
  end
end

Cheers!,

-- Carl