/**
 * OWASP Benchmark v1.2
 *
 * <p>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>.
 *
 * <p>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.
 *
 * <p>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-00/BenchmarkTest00010")
public class BenchmarkTest00010 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 {
        // some code
        response.setContentType("text/html;charset=UTF-8");

        String param = "";
        java.util.Enumeration<String> names = request.getHeaderNames();
        while (names.hasMoreElements()) {
            String name = (String) names.nextElement();

            if (org.owasp.benchmark.helpers.Utils.commonHeaders.contains(name)) {
                continue; // If standard header, move on to next one
            }

            java.util.Enumeration<String> values = request.getHeaders(name);
            if (values != null && values.hasMoreElements()) {
                param = name; // Grabs the name of the first non-standard header as the parameter
                // value
                break;
            }
        }
        // Note: We don't URL decode header names because people don't normally do that

        try {
            int randNumber = java.security.SecureRandom.getInstance("SHA1PRNG").nextInt(99);
            String rememberMeKey = Integer.toString(randNumber);

            String user = "SafeInga";
            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.nextInt(int) - TestCase");
            throw new ServletException(e);
        }
        response.getWriter()
                .println("Weak Randomness Test java.security.SecureRandom.nextInt(int) executed");
    }
}