Method HandlePacketLoginStart

src/Protocol/Protocol17x.cpp:1574–1608

void cProtocol172::HandlePacketLoginStart(cByteBuffer & a_ByteBuffer)
{
	AString Username;
	a_ByteBuffer.ReadVarUTF8String(Username);
	
	if (!m_Client->HandleHandshake(Username))
	{
		// The client is not welcome here, they have been sent a Kick packet already
		return;
	}
	
	// If auth is required, then send the encryption request:
	if (cRoot::Get()->GetServer()->ShouldAuthenticate())
	{
		cPacketizer Pkt(*this, 0x01);
		Pkt.WriteString(cRoot::Get()->GetServer()->GetServerID());
		const AString & PubKeyDer = cRoot::Get()->GetServer()->GetPublicKeyDER();
		Pkt.WriteShort(PubKeyDer.size());
		Pkt.WriteBuf(PubKeyDer.data(), PubKeyDer.size());
		Pkt.WriteShort(4);
		Pkt.WriteInt((int)(intptr_t)this);  // Using 'this' as the cryptographic nonce, so that we don't have to generate one each time :)
		m_Client->SetUsername(Username);
		return;
	}
	
	// Send login success:
	{
		cPacketizer Pkt(*this, 0x02);  // Login success packet
		Pkt.WriteString(Printf("%d", m_Client->GetUniqueID()));  // TODO: proper UUID
		Pkt.WriteString(Username);
	}

	m_State = 3;  // State = Game
	m_Client->HandleLogin(4, Username);
}