联想天工 802.1x认证报文发送

package ZClient;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import jpcap.JpcapSender;
import jpcap.packet.EthernetPacket;
import jpcap.packet.Packet;
/**
 *  802.1x packet sender
 * @author Lingle<p>
 * Email: [email protected]<p>
 */
public class EAPSender {

	private final EthernetPacket etherpacket = new EthernetPacket();
	private byte[] localIp =null;
	private JpcapSender capSender =null;
	private byte[] username =null;
	private byte[] password =null;
	private final byte[] lenovoMAC = { 0x01, (byte) 0x80, (byte) 0xc2, 0x00, 0x00, 0x03 };

	public class EAPNameExcetion extends Exception {
		private static final long serialVersionUID = 4518311057238635826L;
		public EAPNameExcetion(String e) {
			super(e + ": No Name or Password!");
		}
	}

	public EAPSender() {}

	public void setSender(JpcapSender sender, byte[] ip, byte[] mac){
		etherpacket.frametype = (short) 0x888e;
		etherpacket.src_mac = mac;
		etherpacket.dst_mac = lenovoMAC;
		localIp = ip;
		capSender = sender;
	}
	
	public void setName(String name, String pass) {
		if (name!=null) username = name.getBytes();
		if (pass!=null) password = pass.getBytes();
	}

	public boolean ckeckName() {
		if (username==null || password==null) {
			return false;
		}
		if (username.length==0 || password.length==0) {
			return false;
		}
		return true;
	}

	private byte[] MD5PwFill(byte id, byte[] attachkey) {
		byte md5pw[] = new byte[16];
		byte pwkey[] = new byte[17 + password.length];
		pwkey[0] = id;
		System.arraycopy(password, 0, pwkey, 1, password.length);
		System.arraycopy(attachkey, 0, pwkey, 1 + password.length, 16);// MD5-Attach-KEY
		try {
			md5pw = MessageDigest.getInstance("MD5").digest(pwkey);
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		}
		return md5pw;
	}
	
	public void sendEapStart() throws EAPNameExcetion {
		if (ckeckName()) {
		Packet EAP_start = new Packet();
		EAP_start.data = new byte[50];
		byte startdata[] = { 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x2f,(byte) 0xfc, 0x03, 0x01 };
		System.arraycopy(startdata, 0, EAP_start.data, 0, startdata.length);
		EAP_start.datalink = etherpacket;
		capSender.sendPacket(EAP_start);
		} else {
			throw new EAPNameExcetion("Error to send EAP_START");
		}
	}

	public void sendEapOnline() {
		Packet EAP_online = new Packet();
		EAP_online.data = new byte[50];// 64-14
		byte[] onlinedata = { 0x01, (byte) 0xfc, 0x00, 0x0c };// 0xfc=252
		System.arraycopy(onlinedata, 0, EAP_online.data, 0, onlinedata.length);
		System.arraycopy(localIp, 0, EAP_online.data, onlinedata.length + 8,
				localIp.length);// ip offset:8 byte
		EAP_online.datalink = etherpacket;
		capSender.sendPacket(EAP_online);
	}	

	public void sendEapLogOff() {
		Packet EAP_logoff = new Packet();
		EAP_logoff.data = new byte[50];// 64-14
		byte logoffdata[] = { 0x01, 0x02, 0x00, 0x00, 0x00, 0x00, (byte) 0x2f,
				(byte) 0xfc, 0x00, 0x00 };
		System.arraycopy(logoffdata, 0, EAP_logoff.data, 0, logoffdata.length);
		EAP_logoff.datalink = etherpacket;
		capSender.sendPacket(EAP_logoff);
	}
	
	public void sendEapName(byte id) throws EAPNameExcetion {
		if (ckeckName()) {
			Packet EAP_UserName = new Packet();
			EAP_UserName.data = new byte[50];// 64-14
			short bodylen = (short) (username.length + 5);// Extensible Authentication Protocol Length
			byte[] namehead = { 0x01, 0x00, (byte) (bodylen >> 8),
					(byte) bodylen, 0x02, id, (byte) (bodylen >> 8),
					(byte) bodylen, 0x01 };

			System.arraycopy(namehead, 0, EAP_UserName.data, 0, namehead.length);
			System.arraycopy(username, 0, EAP_UserName.data, namehead.length,
					username.length);

			EAP_UserName.datalink = etherpacket;
			capSender.sendPacket(EAP_UserName);
		} else {
			throw new EAPNameExcetion("Error to send EAP_USERNAME");
		}
	}

	public void sendEapPassWord(byte id, byte[] attachkey)throws EAPNameExcetion {
		if (ckeckName()) {
			Packet EAP_PassWord = new Packet();
			byte passtail[] = { 0x00, 0x00, 0x2f, (byte) 0xfc, 0x00, 0x15,
					0x01, 0x01, 0x00 };
			short bodylen = (short) (username.length + 22);// Extensible Authentication  Protocol Length
			byte[] namehead = { 0x01, 0x00, (byte) (bodylen >> 8),
					(byte) bodylen, 0x02, id, (byte) (bodylen >> 8),
					(byte) bodylen, 0x04, 0x10 };
			byte[] md5 = MD5PwFill(id, attachkey);
			EAP_PassWord.data = new byte[bodylen + 35];
			System.arraycopy(namehead, 0, EAP_PassWord.data, 0, namehead.length);
			System.arraycopy(md5, 0, EAP_PassWord.data, namehead.length,
					md5.length);
			System.arraycopy(username, 0, EAP_PassWord.data, namehead.length
					+ md5.length, username.length);
			System.arraycopy(localIp, 0, EAP_PassWord.data, namehead.length
					+ md5.length + username.length, localIp.length);
			System.arraycopy(passtail, 0, EAP_PassWord.data, namehead.length
					+ md5.length + username.length + localIp.length,
					passtail.length);

			EAP_PassWord.datalink = etherpacket;
			capSender.sendPacket(EAP_PassWord);
		} else {
			throw new EAPNameExcetion(" Error to send EAP_PASSWORD");
		}
	}

}