/**
* 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://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 Nick Sanidas <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(value="/cmdi-02/BenchmarkTest02341")
public class BenchmarkTest02341 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;charset=UTF-8");

		String param = "";
		boolean flag = true;
		java.util.Enumeration<String> names = request.getParameterNames();
		while (names.hasMoreElements() && flag) {
			String name = (String) names.nextElement();		    	
			String[] values = request.getParameterValues(name);
			if (values != null) {
				for(int i=0;i<values.length && flag; i++){
					String value = values[i];
					if (value.equals("BenchmarkTest02341")) {
						param = name;
					    flag = false;
					}
				}
			}
		}

		String bar = doSomething(request, param);
		
		String cmd = org.owasp.benchmark.helpers.Utils.getInsecureOSCommandString(this.getClass().getClassLoader());
		String[] args = {cmd};
        String[] argsEnv = { bar };
        
		Runtime r = Runtime.getRuntime();

		try {
			Process p = r.exec(args, argsEnv, new java.io.File(System.getProperty("user.dir")));
			org.owasp.benchmark.helpers.Utils.printOSCommandResults(p, response);
		} catch (IOException e) {
			System.out.println("Problem executing cmdi - TestCase");
			response.getWriter().println(
			  org.owasp.esapi.ESAPI.encoder().encodeForHTML(e.getMessage())
			);
			return;
		}
	}  // end doPost
	
		
	private static String doSomething(HttpServletRequest request, String param) throws ServletException, IOException {

		String bar;
		String guess = "ABC";
		char switchTarget = guess.charAt(1); // condition 'B', which is safe
		
		// Simple case statement that assigns param to bar on conditions 'A', 'C', or 'D'
		switch (switchTarget) {
		  case 'A':
		        bar = param;
		        break;
		  case 'B': 
		        bar = "bob";
		        break;
		  case 'C':
		  case 'D':        
		        bar = param;
		        break;
		  default:
		        bar = "bob's your uncle";
		        break;
		}
	
		return bar;	
	}
}