def decrypt(cipher, plain = Data.new)
      err = GPGME::gpgme_op_decrypt(self, cipher, plain)
      exc = GPGME::error_to_exception(err)
      raise exc if exc
      plain
    end
def decrypt(cipher, plain = Data.new)
      err = GPGME::gpgme_op_decrypt(self, cipher, plain)
      exc = GPGME::error_to_exception(err)
      raise exc if exc
      plain
    end
Crypto operations

 Decrypt the ciphertext and return the plaintext.