/**
* OWASP Benchmark Project v1.2beta
*
* This file is part of the Open Web Application Security Project (OWASP)
* Benchmark Project. For details, please see
* <a href="https://www.owasp.org/index.php/Benchmark">https://www.owasp.org/index.php/Benchmark</a>.
*
* The OWASP Benchmark 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, version 2.
*
* The OWASP Benchmark 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.
*
* @author Dave Wichers <a href="https://www.aspectsecurity.com">Aspect Security</a>
* @created 2015
*/

package org.owasp.benchmark.testcode;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/BenchmarkTest01703")
public class BenchmarkTest01703 extends HttpServlet {
	
	private static final long serialVersionUID = 1L;
	
	@Override
	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doPost(request, response);
	}

	@Override
	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		response.setContentType("text/html");
	
		String queryString = request.getQueryString();
		String paramval = "vector"+"=";
		int paramLoc = -1;
		if (queryString != null) paramLoc = queryString.indexOf(paramval);
		if (paramLoc == -1) {
			response.getWriter().println("getQueryString() couldn't find expected parameter '" + "vector" + "' in query string.");
			return;
		}
		
		String param = queryString.substring(paramLoc + paramval.length()); // 1st assume "vector" param is last parameter in query string.
		// And then check to see if its in the middle of the query string and if so, trim off what comes after.
		int ampersandLoc = queryString.indexOf("&", paramLoc);
		if (ampersandLoc != -1) {
			param = queryString.substring(paramLoc + paramval.length(), ampersandLoc);
		}
		param = java.net.URLDecoder.decode(param, "UTF-8");

		String bar = new Test().doSomething(param);
		
		try {
			float rand = java.security.SecureRandom.getInstance("SHA1PRNG").nextFloat();
			String rememberMeKey = Float.toString(rand).substring(2); // Trim off the 0. at the front.
			
			String user = "SafeFloyd";
			String fullClassName = this.getClass().getName();
			String testCaseNumber = fullClassName.substring(fullClassName.lastIndexOf('.')+1+"BenchmarkTest".length());
			user+= testCaseNumber;
			
			String cookieName = "rememberMe" + testCaseNumber;
			
			boolean foundUser = false;
			javax.servlet.http.Cookie[] cookies = request.getCookies();
			if (cookies != null) {
				for (int i = 0; !foundUser && i < cookies.length; i++) {
					javax.servlet.http.Cookie cookie = cookies[i];
					if (cookieName.equals(cookie.getName())) {
						if (cookie.getValue().equals(request.getSession().getAttribute(cookieName))) {
							foundUser = true;
						}
					}
				}
			}

			
			if (foundUser) {
				response.getWriter().println("Welcome back: " + user + "<br/>");			
			} else {			
				javax.servlet.http.Cookie rememberMe = new javax.servlet.http.Cookie(cookieName, rememberMeKey);
				rememberMe.setSecure(true);
				rememberMe.setPath("/benchmark/" + this.getClass().getSimpleName());
				request.getSession().setAttribute(cookieName, rememberMeKey);
				response.addCookie(rememberMe);
				response.getWriter().println(user + " has been remembered with cookie: " + rememberMe.getName() 
						+ " whose value is: " + rememberMe.getValue() + "<br/>");
			}

	    } catch (java.security.NoSuchAlgorithmException e) {
			System.out.println("Problem executing SecureRandom.nextFloat() - TestCase");
			throw new ServletException(e);
	    }		
		response.getWriter().println("Weak Randomness Test java.security.SecureRandom.nextFloat() executed");
	}  // end doPost

    private class Test {

        public String doSomething(String param) throws ServletException, IOException {

		String bar = "";
		if (param != null) {
			bar = new String( new sun.misc.BASE64Decoder().decodeBuffer( 
		    	new sun.misc.BASE64Encoder().encode( param.getBytes() ) ));
		}

            return bar;
        }
    } // end innerclass Test

} // end DataflowThruInnerClass
