Botnet_Research
/
hostage


			
				
					
						
						
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							package de.tudarmstadt.informatik.hostage.protocol;

import java.util.ArrayList;
import java.util.List;

import javax.net.ssl.SSLContext;

/**
 * HTTP protocol
 * @author Wulf Pfeiffer
 */
public final class HTTP implements Protocol<String> {
	
	/**
	 * Represents the states of the protocol
	 */
	private enum STATE {
		NONE, CLOSED
	}

	/**
	 * Denotes in which state the protocol is right now
	 */
	private STATE state = STATE.NONE;
	
	@Override
	public int getPort() {
		return 80;
	}

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

	@Override
	public List<String> processMessage(String message) {
		List<String> response = new ArrayList<String>();
		request = message + request;
		
		switch(state) {
		case NONE:
			if(!message.contains(version)){
				response.add(buildPacket(versionUnsupported, ""));
			} else if(message.contains(get)) {
				response.add(buildPacket(ok, get));
			} else if(message.contains(head)) {
				response.add(buildPacket(ok, head));
			} else if(message.contains(trace)){
				response.add(buildPacket(ok, trace));
			} else if(message.contains(options)){
				response.add(buildPacket(methodNotAllowed, options));
			} else if(message.contains(post)){
				response.add(buildPacket(methodNotAllowed, post));
			} else if(message.contains(put)){
				response.add(buildPacket(methodNotAllowed, put));
			} else if(message.contains(delete)){
				response.add(buildPacket(methodNotAllowed, delete));
			} else if(message.contains(connect)){
				response.add(buildPacket(methodNotAllowed, connect));
			} else {
				response.add(buildPacket(badRequest, ""));
			}
			state = STATE.CLOSED;
		default:
			state = STATE.CLOSED;
		}
		return response;
	}

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

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

	@Override
	public Class<String> getType() {
		return String.class;
	}

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

	/**
	 * Builds a html response that can be sent
	 * @param code response code that was determined
	 * @param type request type that was sent by the client
	 * @return the html response
	 */
	private String buildPacket(String code, String type) {
		String doc = "";
		if(type.equals(get)) doc = htmlDoc;
		else if(type.equals(head)) doc = "";
		else if(type.equals(trace)) doc = request;
		else doc = errorHtmlPrefix + code + errorHtmlSuffix;
		
		return version + code + headerPrefix + doc.length() + headerSuffix + doc;
	}

	/** Whole request that was sent by the client */
	private String request = "";
	private String version = "HTTP/1.1";
	//request codes
	private String options 	= "OPTIONS";
	private String get 		= "GET";
	private String head 	= "HEAD";
	private String post		= "POST";
	private String put		= "PUT";
	private String delete	= "DELETE";
	private String trace	= "TRACE";
	private String connect	= "CONNECT";
	//response codes
	private String ok 					= " 200 OK\r\n";
	private String badRequest 			= " 400 Bad Request\r\n";
	private String methodNotAllowed 	= " 405 Method Not Allowed\r\n";
	private String versionUnsupported 	= " 505 HTTP Version not supported\r\n";
	
	//html header pre and suffix
	private String headerPrefix =				
			"Date: Mon, 01 Jul 2013 18:27:55 GMT\r\n" +
			"Server: Apache/2.2.22 (Debian)\r\n" +
			"Vary: Accept-Encoding\r\n" +
			"Content-Length: ";
	private String headerSuffix =
			"\r\n" +	
			"Keep-Alive: timeout=5, max=100\r\n" +
			"Connection: Keep-Alive\r\n" +
			"Content-Type: text/html\r\n" +
			"\r\n";
	//html website
	private String htmlDoc = 
			"<!doctype html>\n" +
			"<html lang=\"en\">\n" +
			"<head>\n" +
			"<meta charset=\"UTF-8\">\n" +
			"<title>Test successful</title>\n" +
			"</head>\n" +
			"<body>\n" +
			"<h1>Test successful</h1>\n" +
			"<p>Congratulations.</p>\n" +
			"</body>\n" +
			"</html>";
	//html error pre and suffix
	private String errorHtmlPrefix =
			"<!doctype html>\n" +
			"<html lang=\"en\">\n" +
			"<head>\n" +
			"<meta charset=\"UTF-8\">\n" +
			"<title>";
	private String errorHtmlSuffix =
			"</title>\n" +
			"</head>\n" +
			"<body>\n" +
			"</body>\n" +
			"</html>";
}