truelauncher.client.auth.Type2.java Source code

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Here is the source code for truelauncher.client.auth.Type2.java

Source

/**
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

package truelauncher.client.auth;

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;

import org.apache.commons.codec.Charsets;

public class Type2 {

    protected static void writeAuthPacket(DataOutputStream dos, PlayerAuthData padata) throws IOException {
        //
        //fake 1.7.2 handshake packet format.
        //host = authpacket(AuthConnector + nick + token + password)
        //

        //create frame buffer
        ByteArrayOutputStream frame = new ByteArrayOutputStream();
        DataOutputStream frameOut = new DataOutputStream(frame);
        String authpacket = "AuthConnector|" + padata.getNick() + "|" + padata.getToken() + "|"
                + padata.getPassword();
        //write handshake packet to frame
        //write packet id
        writeVarInt(frameOut, 0x00);
        //write protocolVersion
        writeVarInt(frameOut, padata.getProtocolVersion());
        //write authpacket instead of hostname
        writeString(frameOut, authpacket);
        //write port
        frameOut.writeShort(padata.getPort());
        //write state
        writeVarInt(frameOut, 2);
        //now write frame to real socket
        //write length
        writeVarInt(dos, frame.size());
        //write packet
        frame.writeTo(dos);
        frame.reset();
        //close frames
        frameOut.close();
        frame.close();
    }

    private static void writeString(DataOutputStream dos, String string) throws IOException {
        byte[] bytes = string.getBytes(Charsets.UTF_8);
        writeVarInt(dos, bytes.length);
        dos.write(bytes);
    }

    private static void writeVarInt(DataOutputStream dos, int varint) throws IOException {
        int part;
        while (true) {
            part = varint & 0x7F;
            varint >>>= 7;
            if (varint != 0) {
                part |= 0x80;
            }
            dos.writeByte(part);
            if (varint == 0) {
                break;
            }
        }
    }

}