/**
* OWASP Benchmark Project v1.2
*
* This file is part of the Open Web Application Security Project (OWASP)
* Benchmark Project. For details, please see
* <a href="https://owasp.org/www-project-benchmark/">https://owasp.org/www-project-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
* @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(value="/weakrand-02/BenchmarkTest00985")
public class BenchmarkTest00985 extends HttpServlet {
	
	private static final long serialVersionUID = 1L;
	
	@Override
	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		response.setContentType("text/html;charset=UTF-8");
		javax.servlet.http.Cookie userCookie = new javax.servlet.http.Cookie("BenchmarkTest00985", "whatever");
		userCookie.setMaxAge(60*3); //Store cookie for 3 minutes
		userCookie.setSecure(true);
		userCookie.setPath(request.getRequestURI());
		userCookie.setDomain(new java.net.URL(request.getRequestURL().toString()).getHost());
		response.addCookie(userCookie);
		javax.servlet.RequestDispatcher rd = request.getRequestDispatcher("/weakrand-02/BenchmarkTest00985.html");
		rd.include(request, response);
	}

	@Override
	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		response.setContentType("text/html;charset=UTF-8");
	
		javax.servlet.http.Cookie[] theCookies = request.getCookies();
		
		String param = "noCookieValueSupplied";
		if (theCookies != null) {
			for (javax.servlet.http.Cookie theCookie : theCookies) {
				if (theCookie.getName().equals("BenchmarkTest00985")) {
					param = java.net.URLDecoder.decode(theCookie.getValue(), "UTF-8");
					break;
				}
			}
		}

		String bar = new Test().doSomething(request, param);
		
		try {
			java.util.Random numGen = java.security.SecureRandom.getInstance("SHA1PRNG");
        	double rand = getNextNumber(numGen);
			
			String rememberMeKey = Double.toString(rand).substring(2); // Trim off the 0. at the front.
			
			String user = "SafeDonatella";
			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.setHttpOnly(true);
				rememberMe.setPath(request.getRequestURI()); // i.e., set path to JUST this servlet 
															 // e.g., /benchmark/sql-01/BenchmarkTest01001
				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.nextDouble() - TestCase");
			throw new ServletException(e);
	    }
		
		response.getWriter().println(
"Weak Randomness Test java.security.SecureRandom.nextDouble() executed"
);

	}  // end doPost

		double getNextNumber(java.util.Random generator) {
			return generator.nextDouble();
		}
	
    private class Test {

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

		String bar = param;
		if (param != null && param.length() > 1) {
		    StringBuilder sbxyz77085 = new StringBuilder(param);
		    bar = sbxyz77085.replace(param.length()-"Z".length(), param.length(),"Z").toString();
		}

            return bar;
        }
    } // end innerclass Test

} // end DataflowThruInnerClass
