How to use

addSuppressed

method

in

java.security.InvalidKeyException

  public PrivateKey toPrivateKey(String password) throws GeneralSecurityException, IOException {
    KeySpec keySpec;
    if (password == null) {
      keySpec = new PKCS8EncodedKeySpec(decode());
    } else {
      EncryptedPrivateKeyInfo privateKeyInfo = new EncryptedPrivateKeyInfo(decode());
      SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance(privateKeyInfo.getAlgName());
      SecretKey secretKey = secretKeyFactory.generateSecret(new PBEKeySpec(password.toCharArray()));
      Cipher cipher = Cipher.getInstance(privateKeyInfo.getAlgName());
      cipher.init(Cipher.DECRYPT_MODE, secretKey, privateKeyInfo.getAlgParameters());
      keySpec = privateKeyInfo.getKeySpec(cipher);
    }
    InvalidKeyException exception = new InvalidKeyException(sm.getString("jsse.pemParseError", filename));
    for (String algorithm : new String[] {"RSA", "DSA", "EC"}) {
      try {
        return KeyFactory.getInstance(algorithm).generatePrivate(keySpec);
      } catch (InvalidKeySpecException e) {
        exception.addSuppressed(e);
      }
    }
    throw exception;
  }
}