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

ctx = GPGME::GpgmeCtx.new

passphrase_cb = proc do |h,d,r|
  if d
    STDERR.puts(d)
    begin
      system('stty -echo')
      gets.chomp
    ensure
      system('stty echo')
    end
  end
end
ctx.set_passphrase_cb(passphrase_cb)

plain = GPGME::GpgmeData.new
plain.write('test test test')

signed = ctx.sign(plain, GPGME::GPGME_SIG_MODE_CLEAR)
puts("#{signed.read}")