authenticate_challenge_reply_input {
  cast_message {
    protocol_version: CASTV2_1_0
    source_id: ""
    destination_id: ""
    namespace: ""
    payload_type: BINARY
  }
  nonce: ""

  start_case: VALID
  expiry_case: VALID
  nonce_ok: false
  response_certs_ok: false
  crl_certs_ok: false
  crl_signatures_ok: false

  auth_message {
    error {
      error_type: INTERNAL_ERROR
    }
  }
}