hostage/src/de/tudarmstadt/informatik/hostage/protocol/SMB.java

package de.tudarmstadt.informatik.hostage.protocol;

import java.security.SecureRandom;
import java.util.ArrayList;
import java.util.List;

import de.tudarmstadt.informatik.hostage.Hostage;
import de.tudarmstadt.informatik.hostage.R;
import de.tudarmstadt.informatik.hostage.protocol.SMBUtils.NBNS;
import de.tudarmstadt.informatik.hostage.protocol.SMBUtils.NMB;
import de.tudarmstadt.informatik.hostage.protocol.SMBUtils.SMBPacket;
import de.tudarmstadt.informatik.hostage.wrapper.Packet;

/**
 * SMB protocol. It can handle the following requests: Negotiate Protocol
 * Request, Session Setup AndX Request, Tree Connect AndX Request, NT Create
 * AndX Request, Bind, NetShareEnumAll, Close Request, Tree Disconnect Request,
 * Echo Request, Trans2 Request.
 * 
 * @author Wulf Pfeiffer
 */
public class SMB implements Protocol {
	// message constants
	private static final byte SMB_COM_CLOSE = 0x04;
	private static final byte SMB_COM_TRANSACTION = 0x25;
	private static final byte SMB_COM_ECHO = 0x2B;
	private static final byte SMB_COM_TRANSACTION2 = 0x32;
	private static final byte SMB_COM_TREE_DISCONNECT = 0x71;
	private static final byte SMB_COM_NEGOTIATE = 0x72;
	private static final byte SMB_COM_SESSION_SETUP_ANDX = 0x73;
	private static final byte SMB_COM_TREE_CONNECT_ANDX = 0x75;
	private static final byte SMB_COM_NT_CREATE_ANDX = (byte) 0xA2;
	
	/**
	 * Denotes in which state the protocol is right now
	 */
	private STATE state = STATE.NONE;
	private byte[] lastMessage;

	// version stuff
	private String[][] possibleSmbVersions = {
			{ "Windows 7 Professional 7600", "Windows 7 Professional 6.1" },
			{ "Windows 8 Enterprise 9200", "Windows 8 Enterprise 9200" },
			{ "Windows Server 2008 R2 Enterprise 7600", "Windows Server 2008 R2 Enterprise 6.1" },
			{ "Windows Server 2012 Standard 6.2", "Windows Server 2012 Standard 6.2" },
			{ "Unix", "Samba" },
			{ "Windows 2002 Service Pack 2", "Windows 2002 5.1" }
	};
	
	/**
	 * Represents the states of the protocol
	 */
	private static enum STATE {
		NONE, CONNECTED, AUTHENTICATED, LISTING, DISCONNECTED, CLOSED
	}
	
	public void setIP(String ip) {
//		new NMB(ip).start();
	}

	private String[] initServerVersion() {
		System.out.println("hi");
		String sharedPreferencePath = Hostage.getContext().getString(
				R.string.shared_preference_path);
		System.out.println(sharedPreferencePath);
		String profile = Hostage
				.getContext()
				.getSharedPreferences(sharedPreferencePath,
						Hostage.MODE_PRIVATE).getString("os", "");
		System.out.println(profile);
		if (profile.equals("Windows 7")) {
			return possibleSmbVersions[0];
		} else if (profile.equals("Windows 8")) {
			return possibleSmbVersions[1];
		} else if (profile.equals("Windows Server 2008")) {
			return possibleSmbVersions[2];
		} else if (profile.equals("Windows Server 2012")) {
			return possibleSmbVersions[3];
		} else if (profile.equals("Linux")) {
			return possibleSmbVersions[4];
		} else if (profile.equals("Windows XP")) {
			return possibleSmbVersions[5];
		} else {
			return possibleSmbVersions[new SecureRandom().nextInt(possibleSmbVersions.length)];
		}
	}
	
	//required to be declared down here, do not change position over initServerVersion() and possibleServerVersions!!
	private String[] serverVersion = initServerVersion();
	private SMBPacket smbPacket = new SMBPacket(serverVersion);

	@Override
	public int getPort() {
		return 445;
	}

	@Override
	public boolean isClosed() {
		return (state == STATE.CLOSED);
	}

	@Override
	public boolean isSecure() {
		return false;
	}

	@Override
	public List<Packet> processMessage(Packet requestPacket) {
		if (requestPacket != null)
			lastMessage = requestPacket.getBytes();
		smbPacket.prepareNextResponse(lastMessage);
		byte smbCommand = smbPacket.getSmbCommand();
		List<Packet> responsePackets = new ArrayList<Packet>();

		switch (state) {
		case NONE:
			if (smbCommand == SMB_COM_NEGOTIATE) {
				state = STATE.CONNECTED;
				responsePackets.add(new Packet(smbPacket.getNego()));
			} else {
				state = STATE.DISCONNECTED;
				responsePackets.add(new Packet(smbPacket.getTreeDisc()));
			}
			break;
		case CONNECTED:
			if (smbCommand == SMB_COM_SESSION_SETUP_ANDX) {
				responsePackets.add(new Packet(smbPacket.getSessSetup()));
			} else if (smbCommand == SMB_COM_TREE_CONNECT_ANDX) {
				state = STATE.AUTHENTICATED;
				responsePackets.add(new Packet(smbPacket.getTreeCon()));
			} else {
				state = STATE.DISCONNECTED;
				responsePackets.add(new Packet(smbPacket.getTreeDisc()));
			}
			break;
		case AUTHENTICATED:
			if (smbCommand == SMB_COM_NT_CREATE_ANDX) {
				state = STATE.LISTING;
				responsePackets.add(new Packet(smbPacket.getNTCreate()));
			} else if (smbCommand == SMB_COM_ECHO) {
				responsePackets.add(new Packet(smbPacket.getEcho()));
			} else if (smbCommand == SMB_COM_TRANSACTION2) {
				responsePackets.add(new Packet(smbPacket.getTrans2()));
			} else if (smbCommand == SMB_COM_CLOSE) {
				responsePackets.add(new Packet(smbPacket.getClose()));
			} else if (smbCommand == SMB_COM_TREE_DISCONNECT) {
				state = STATE.CLOSED;
				responsePackets.add(new Packet(smbPacket.getTreeDisc()));
			} else {
				state = STATE.DISCONNECTED;
				responsePackets.add(new Packet(smbPacket.getTreeDisc()));
			}
			break;
		case LISTING:
			if (smbCommand == SMB_COM_TRANSACTION) {
				responsePackets.add(new Packet(smbPacket.getTrans()));
			} else if (smbCommand == SMB_COM_CLOSE) {
				responsePackets.add(new Packet(smbPacket.getClose()));
			} else if (smbCommand == SMB_COM_TREE_DISCONNECT) {
				state = STATE.CLOSED;
				responsePackets.add(new Packet(smbPacket.getTreeDisc()));
			} else if (smbCommand == SMB_COM_NEGOTIATE) {
				state = STATE.CONNECTED;
				responsePackets.add(new Packet(smbPacket.getNego()));
			} else {
				state = STATE.DISCONNECTED;
				responsePackets.add(new Packet(smbPacket.getTreeDisc()));
			}
			break;
		case DISCONNECTED:
			state = STATE.CLOSED;
			responsePackets.add(new Packet(smbPacket.getTreeDisc()));
			break;
		default:
			state = STATE.CLOSED;
			responsePackets.add(new Packet(smbPacket.getTreeDisc()));
		}
		return responsePackets;
	}

	@Override
	public String toString() {
		return "SMB";
	}

	@Override
	public TALK_FIRST whoTalksFirst() {
		return TALK_FIRST.CLIENT;
	}
}