声网rtm加密传输

 @Bean
public RtmClient rtmClient() throws Exception {
    RtmEncryptionConfig rtmEncryptionConfig = new RtmEncryptionConfig();
    rtmEncryptionConfig.setEncryptionMode(RtmConstants.RtmEncryptionMode.AES_256_GCM);
    rtmEncryptionConfig.setEncryptionKey(agoraProperties.getEncryptionKey());
    rtmEncryptionConfig.setEncryptionSalt(agoraProperties.getEncryptionKdfSalt().getBytes(StandardCharsets.UTF_8));
    RtmConfig rtmConfig = new RtmConfig.Builder(agoraProperties.getAppId(), RoomConst.SERVER_ID.toString())
            .eventListener(agoraRtmClientListener)
            .encryptionConfig(rtmEncryptionConfig)
            .build();
    var mRtmClient = RtmClient.create(rtmConfig);
    mRtmClient.login(AgoraUtil.generateRtmToken(), AgoraUtil.resultCallback("login"));
    return mRtmClient;
}