LoginPacket Class Reference

Public Member Functions
	decode ()
	encode ()
	decodeToken ($token, $key)
Public Member Functions inherited from DataPacket
	pid ()
	encode ()
	decode ()
	reset ()
	clean ()
	__debugInfo ()
	getEntityMetadata (bool $types=true)
	putEntityMetadata (array $metadata)
	getName ()
Public Member Functions inherited from BinaryStream
	__construct ($buffer="", $offset=0)
	reset ()
	setBuffer ($buffer=null, $offset=0)
	getOffset ()
	getBuffer ()
	get ($len)
	put ($str)
	getBool ()
	putBool ($v)
	getLong ()
	putLong ($v)
	getInt ()
	putInt ($v)
	getLLong ()
	putLLong ($v)
	getLInt ()
	putLInt ($v)
	getSignedShort ()
	putShort ($v)
	getShort ()
	putSignedShort ($v)
	getFloat (int $accuracy=-1)
	putFloat ($v)
	getLShort ($signed=true)
	putLShort ($v)
	getLFloat (int $accuracy=-1)
	putLFloat ($v)
	getTriad ()
	putTriad ($v)
	getLTriad ()
	putLTriad ($v)
	getByte ()
	putByte ($v)
	getUUID ()
	putUUID (UUID $uuid)
	getSlot ()
	putSlot (Item $item)
	getString ()
	putString ($v)
	getUnsignedVarInt ()
	putUnsignedVarInt ($v)
	getVarInt ()
	putVarInt ($v)
	getEntityId ()
	putEntityId ($v)
	getBlockCoords (&$x, &$y, &$z)
	putBlockCoords ($x, $y, $z)
	getVector3f (&$x, &$y, &$z)
	putVector3f ($x, $y, $z)
	feof ()

Data Fields
const	NETWORK_ID = ProtocolInfo::LOGIN_PACKET
const	MOJANG_PUBKEY = "MHYwEAYHKoZIzj0CAQYFK4EEACIDYgAE8ELkixyLcwlZryUQcu1TvPOmI2B7vX83ndnWRUaXm74wFfa5f/lwQNTfrLVHa2PmenpGI6JhIMUJaWZrjmMj90NoKNFSNBuKdm8rYiXsfaz3K36x/1U26HpG0ZxK/V1V"
const	EDITION_POCKET = 0
	$username
	$protocol
	$gameEdition
	$clientUUID
	$clientId
	$identityPublicKey
	$serverAddress
	$skinId = null
	$skin = null
	$clientData = []
	$deviceModel
	$deviceOS
Data Fields inherited from DataPacket
const	NETWORK_ID = 0
	$isEncoded = false
Data Fields inherited from BinaryStream
	$offset
	$buffer

Member Function Documentation

decode()

decode

(

)

                            {
        $this->protocol = $this->getInt();
        if(!in_array($this->protocol, ProtocolInfo::ACCEPTED_PROTOCOLS)){
            $this->buffer = null;
            return;
        }

        $this->gameEdition = $this->getByte();

        $this->setBuffer($this->getString(), 0);

        $time = time();

        $chainData = json_decode($this->get($this->getLInt()))->{"chain"};
        // Start with the trusted one
        $chainKey = self::MOJANG_PUBKEY;
        while(!empty($chainData)){
            foreach($chainData as $index => $chain){
                list($verified, $webtoken) = $this->decodeToken($chain, $chainKey);
                if(isset($webtoken["extraData"])){
                    if(isset($webtoken["extraData"]["displayName"])){
                        $this->username = $webtoken["extraData"]["displayName"];
                    }
                    if(isset($webtoken["extraData"]["identity"])){
                        $this->clientUUID = $webtoken["extraData"]["identity"];
                    }
                }
                if($verified){
                    $verified = isset($webtoken["nbf"]) && $webtoken["nbf"] <= $time && isset($webtoken["exp"]) && $webtoken["exp"] > $time;
                }
                if($verified and isset($webtoken["identityPublicKey"])){
                    // Looped key chain. #blamemojang
                    if($webtoken["identityPublicKey"] != self::MOJANG_PUBKEY) $chainKey = $webtoken["identityPublicKey"];
                    break;
                }elseif($chainKey === null){
                    // We have already gave up
                    break;
                }
            }
            if(!$verified && $chainKey !== null){
                $chainKey = null;
            }else{
                unset($chainData[$index]);
            }
        }

        list($verified, $this->clientData) = $this->decodeToken($this->get($this->getLInt()), $chainKey);

        $this->clientId = $this->clientData["ClientRandomId"] ?? null;
        $this->serverAddress = $this->clientData["ServerAddress"] ?? null;
        $this->skinId = $this->clientData["SkinId"] ?? null;

        if(isset($this->clientData["SkinData"])){
            $this->skin = base64_decode($this->clientData["SkinData"]);
        }

        if(isset($this->clientData["DeviceModel"])){
            $this->deviceModel = $this->clientData["DeviceModel"];
        }

        if(isset($this->clientData["DeviceOS"])){
            $this->deviceOS = $this->clientData["DeviceOS"];
        }

        if($verified){
            $this->identityPublicKey = $chainKey;
        }
    }

decodeToken()

decodeToken	(		$token,
			$key
	)

Parameters

$token
$key

Returns

array

                                             {
        $tokens = explode(".", $token);
        list($headB64, $payloadB64, $sigB64) = $tokens;

        if($key !== null and extension_loaded("openssl")){
            $sig = base64_decode(strtr($sigB64, '-_', '+/'), true);
            $rawLen = 48; // ES384
            for($i = $rawLen; $i > 0 and $sig[$rawLen - $i] == chr(0); $i--){
            }
            $j = $i + (ord($sig[$rawLen - $i]) >= 128 ? 1 : 0);
            for($k = $rawLen; $k > 0 and $sig[2 * $rawLen - $k] == chr(0); $k--){
            }
            $l = $k + (ord($sig[2 * $rawLen - $k]) >= 128 ? 1 : 0);
            $len = 2 + $j + 2 + $l;
            $derSig = chr(48);
            if($len > 255){
                throw new \RuntimeException("Invalid signature format");
            }elseif($len >= 128){
                $derSig .= chr(81);
            }
            $derSig .= chr($len) . chr(2) . chr($j);
            $derSig .= str_repeat(chr(0), $j - $i) . substr($sig, $rawLen - $i, $i);
            $derSig .= chr(2) . chr($l);
            $derSig .= str_repeat(chr(0), $l - $k) . substr($sig, 2 * $rawLen - $k, $k);

            $verified = openssl_verify($headB64 . "." . $payloadB64, $derSig, "-----BEGIN PUBLIC KEY-----\n" . wordwrap($key, 64, "\n", true) . "\n-----END PUBLIC KEY-----\n", OPENSSL_ALGO_SHA384) === 1;
        }else{
            $verified = false;
        }

        return [$verified, json_decode(base64_decode($payloadB64), true)];
    }

encode()

encode

(

)

                            {

    }

Field Documentation

$clientData

$clientData = []

$clientId

$clientId

$clientUUID

$clientUUID

$deviceModel

$deviceModel

$deviceOS

$deviceOS

$gameEdition

$gameEdition

$identityPublicKey

$identityPublicKey

$protocol

$protocol

$serverAddress

$serverAddress

$skin

$skin = null

$skinId

$skinId = null

$username

$username

EDITION_POCKET

const EDITION_POCKET = 0

MOJANG_PUBKEY

const MOJANG_PUBKEY = "MHYwEAYHKoZIzj0CAQYFK4EEACIDYgAE8ELkixyLcwlZryUQcu1TvPOmI2B7vX83ndnWRUaXm74wFfa5f/lwQNTfrLVHa2PmenpGI6JhIMUJaWZrjmMj90NoKNFSNBuKdm8rYiXsfaz3K36x/1U26HpG0ZxK/V1V"

NETWORK_ID

const NETWORK_ID = ProtocolInfo::LOGIN_PACKET

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The documentation for this class was generated from the following file:

• src/pocketmine/network/mcpe/protocol/LoginPacket.php