class GPGME::Signature

def to_s
  case status_code
  when GPGME::GPG_ERR_NO_ERROR
    "Good signature from #{from}"
  when GPGME::GPG_ERR_SIG_EXPIRED
    "Expired signature from #{from}"
  when GPGME::GPG_ERR_KEY_EXPIRED
    "Signature made from expired key #{from}"
  when GPGME::GPG_ERR_CERT_REVOKED
    "Signature made from revoked key #{from}"
  when GPGME::GPG_ERR_BAD_SIGNATURE
    "Bad signature from #{from}"
  when GPGME::GPG_ERR_NO_PUBKEY
    "No public key for #{from}"
  end
end