public void handleEncryptionRequest(SPacketEncryptionRequest packetIn) {
        final SecretKey secretkey = CryptManager.createNewSharedKey();
        String s = packetIn.getServerId();
        PublicKey publickey = packetIn.getPublicKey();
        String s1 = (new BigInteger(CryptManager.getServerIdHash(s, publickey, secretkey))).toString(16);

        if (this.mc.getCurrentServerData() != null && this.mc.getCurrentServerData().isOnLAN()) {
            try {
                this.getSessionService().joinServer(this.mc.getSession().getProfile(), this.mc.getSession().getToken(), s1);
            } catch (AuthenticationException var10) {
                LOGGER.warn("Couldn't connect to auth servers but will continue to join LAN");
            }
        } else {
            try {
                this.getSessionService().joinServer(this.mc.getSession().getProfile(), this.mc.getSession().getToken(), s1);
            } catch (AuthenticationUnavailableException var7) {
                this.networkManager.closeChannel(new TextComponentTranslation("disconnect.loginFailedInfo", new Object[]{new TextComponentTranslation("disconnect.loginFailedInfo.serversUnavailable", new Object[0])}));
                return;
            } catch (InvalidCredentialsException var8) {
                this.networkManager.closeChannel(new TextComponentTranslation("disconnect.loginFailedInfo", new Object[]{new TextComponentTranslation("disconnect.loginFailedInfo.invalidSession", new Object[0])}));
                return;
            } catch (AuthenticationException authenticationexception) {
                this.networkManager.closeChannel(new TextComponentTranslation("disconnect.loginFailedInfo", new Object[]{authenticationexception.getMessage()}));
                return;
            }
        }

        this.networkManager.sendPacket(new CPacketEncryptionResponse(secretkey, publickey, packetIn.getVerifyToken()), new GenericFutureListener<Future<? super Void>>() {
            public void operationComplete(Future<? super Void> p_operationComplete_1_) throws Exception {
                NetHandlerLoginClient.this.networkManager.enableEncryption(secretkey);
            }
        });
    }