I seem to find a bug when using jwt in version 5.3.6

[Xiangyu Liu]

The following code snippet comes from the Class "org.apereo.cas.token.cipher.RegisteredServiceTokenTicketCipherExecutor" which is in the package cas-server-support-token-core-5.3.6.

    @Override

    public String encode(final String data, final Optional<RegisteredService> service) {

        if (service.isPresent()) {

            final RegisteredService registeredService = service.get();

            if (supports(registeredService)) {

                LOGGER.debug("Found signing and/or encryption keys for [{}] in service registry to encode", registeredService.getServiceId());

                final String encryptionKey = getEncryptionKey(registeredService).get();

                final String signingKey = getSigningKey(registeredService).get();

                final TokenTicketCipherExecutor cipher = new TokenTicketCipherExecutor(encryptionKey, signingKey,

                    StringUtils.isNotBlank(encryptionKey), StringUtils.isNotBlank(signingKey));

                if (cipher.isEnabled()) {

                    return cipher.encode(data);

                }

            }

        }

        return encode(data);

    }

    @Override

    public boolean supports(final RegisteredService registeredService) {

        return getSigningKey(registeredService).isPresent() || getEncryptionKey(registeredService).isPresent();

    }

    /**

     * Gets signing key.

     *

     * @param registeredService the registered service

     * @return the signing key

     */

    public Optional<String> getSigningKey(final RegisteredService registeredService) {

        if (RegisteredServiceProperties.TOKEN_AS_SERVICE_TICKET_SIGNING_KEY.isAssignedTo(registeredService)) {

            final String signingKey = RegisteredServiceProperties.TOKEN_AS_SERVICE_TICKET_SIGNING_KEY.getPropertyValue(registeredService).getValue();

            return Optional.of(signingKey);

        }

        return Optional.empty();

    }

As seen from the "supports" method, jwt supports setting only one of "EncryptionKey" and "SigningKey".

But if I only set one of them, "getEncryptionKey(registeredService).get()" or "getSigningKey(registeredService).get()" in the "encode" method will throw an error "java.util.NoSuchElementException: No value present"