LoginPacket.php

<?php
 
/*
 * This file is part of BedrockProtocol.
 * Copyright (C) 2014-2022 PocketMine Team <https://github.com/pmmp/BedrockProtocol>
 *
 * BedrockProtocol is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 */
 
declare(strict_types=1);
 
namespace pocketmine\network\mcpe\protocol;
 
use pmmp\encoding\BE;
use pmmp\encoding\ByteBufferReader;
use pmmp\encoding\ByteBufferWriter;
use pmmp\encoding\LE;
use pocketmine\network\mcpe\protocol\serializer\CommonTypes;
use function strlen;
 
class LoginPacket extends DataPacket implements ServerboundPacket{
    public const NETWORK_ID = ProtocolInfo::LOGIN_PACKET;
 
    public int $protocol;
    public string $authInfoJson;
    public string $clientDataJwt;
 
    public static function create(int $protocol, string $authInfoJson, string $clientDataJwt) : self{
        $result = new self;
        $result->protocol = $protocol;
        $result->authInfoJson = $authInfoJson;
        $result->clientDataJwt = $clientDataJwt;
        return $result;
    }
 
    public function canBeSentBeforeLogin() : bool{
        return true;
    }
 
    protected function decodePayload(ByteBufferReader $in) : void{
        $this->protocol = BE::readUnsignedInt($in);
        $this->decodeConnectionRequest(CommonTypes::getString($in));
    }
 
    protected function decodeConnectionRequest(string $binary) : void{
        $connRequestReader = new ByteBufferReader($binary);
 
        $authInfoJsonLength = LE::readUnsignedInt($connRequestReader);
        $this->authInfoJson = $connRequestReader->readByteArray($authInfoJsonLength);
 
        $clientDataJwtLength = LE::readUnsignedInt($connRequestReader);
        $this->clientDataJwt = $connRequestReader->readByteArray($clientDataJwtLength);
    }
 
    protected function encodePayload(ByteBufferWriter $out) : void{
        BE::writeUnsignedInt($out, $this->protocol);
        CommonTypes::putString($out, $this->encodeConnectionRequest());
    }
 
    protected function encodeConnectionRequest() : string{
        $connRequestWriter = new ByteBufferWriter();
 
        LE::writeUnsignedInt($connRequestWriter, strlen($this->authInfoJson));
        $connRequestWriter->writeByteArray($this->authInfoJson);
 
        LE::writeUnsignedInt($connRequestWriter, strlen($this->clientDataJwt));
        $connRequestWriter->writeByteArray($this->clientDataJwt);
 
        return $connRequestWriter->getData();
    }
 
    public function handle(PacketHandlerInterface $handler) : bool{
        return $handler->handleLogin($this);
    }
}