/**
* 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="/hash-01/BenchmarkTest01039")
public class BenchmarkTest01039 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 = "";
		if (request.getHeader("BenchmarkTest01039") != null) {
			param = request.getHeader("BenchmarkTest01039");
		}
		
		// URL Decode the header value since req.getHeader() doesn't. Unlike req.getParameter().
		param = java.net.URLDecoder.decode(param, "UTF-8");

		String bar = new Test().doSomething(request, param);
		
		try {
			java.security.MessageDigest md = java.security.MessageDigest.getInstance("SHA-256");
			byte[] input = { (byte)'?' };
			Object inputParam = bar;
			if (inputParam instanceof String) input = ((String) inputParam).getBytes();
			if (inputParam instanceof java.io.InputStream) {
				byte[] strInput = new byte[1000];
				int i = ((java.io.InputStream) inputParam).read(strInput);
				if (i == -1) {
					response.getWriter().println(
"This input source requires a POST, not a GET. Incompatible UI for the InputStream source."
);
					return;
				}
				input = java.util.Arrays.copyOf(strInput, i);
			}			
			md.update(input);
			
			byte[] result = md.digest();
			java.io.File fileTarget = new java.io.File(
					new java.io.File(org.owasp.benchmark.helpers.Utils.TESTFILES_DIR),"passwordFile.txt");
			java.io.FileWriter fw = new java.io.FileWriter(fileTarget,true); //the true will append the new data
			    fw.write("hash_value=" + org.owasp.esapi.ESAPI.encoder().encodeForBase64(result, true) + "\n");
			fw.close();
			response.getWriter().println(
"Sensitive value '" + org.owasp.esapi.ESAPI.encoder().encodeForHTML(new String(input)) + "' hashed and stored<br/>"
);

		} catch (java.security.NoSuchAlgorithmException e) {
			System.out.println("Problem executing hash - TestCase");
			throw new ServletException(e);
		}
		
		response.getWriter().println(
"Hash Test java.security.MessageDigest.getInstance(java.lang.String) executed"
);
	}  // end doPost

	
    private class Test {

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

		String bar;
		
		// Simple ? condition that assigns constant to bar on true condition
		int num = 106;
		
		bar = (7*18) + num > 200 ? "This_should_always_happen" : param;
		

            return bar;
        }
    } // end innerclass Test

} // end DataflowThruInnerClass
