@Test
public void testLoadExistingOne() {

  // when
  final InputStream in = open("keystore.p12");
  final String ksPassword = "password";
  final JavaKeyStore keyStore = new JavaKeyStore("PKCS12", in, ksPassword.toCharArray());
  final KeyAlias alias = new KeyAlias("keyalias");
  final String keyPassword = "password";
  final Authentication authentication = Authentication.of(alias, keyPassword);
  // then
  final Signer signer = keyStore.load(authentication);
  logger.info("Signer: {}", signer);
  assertNotNull(signer);
}