Java tutorial
/** * 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("/BenchmarkTest01667") public class BenchmarkTest01667 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); // Code based on example from: // http://examples.javacodegeeks.com/core-java/crypto/encrypt-decrypt-file-stream-with-des/ // 16-byte initialization vector byte[] iv = { (byte) 0xB2, (byte) 0x12, (byte) 0xD5, (byte) 0xB2, (byte) 0x44, (byte) 0x21, (byte) 0xC3, (byte) 0xC3, (byte) 0xF3, (byte) 0x3C, (byte) 0x23, (byte) 0xB9, (byte) 0x9E, (byte) 0xC5, (byte) 0x77, (byte) 0x0B033 }; try { javax.crypto.Cipher c = javax.crypto.Cipher.getInstance("AES/CBC/PKCS5PADDING", java.security.Security.getProvider("SunJCE")); // Prepare the cipher to encrypt javax.crypto.SecretKey key = javax.crypto.KeyGenerator.getInstance("AES").generateKey(); java.security.spec.AlgorithmParameterSpec paramSpec = new javax.crypto.spec.IvParameterSpec(iv); c.init(javax.crypto.Cipher.ENCRYPT_MODE, key, paramSpec); // encrypt and store the results 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); } byte[] result = c.doFinal(input); java.io.File fileTarget = new java.io.File( new java.io.File(org.owasp.benchmark.helpers.Utils.testfileDir), "passwordFile.txt"); java.io.FileWriter fw = new java.io.FileWriter(fileTarget, true); //the true will append the new data fw.write("secret_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)) + "' encrypted and stored<br/>"); } catch (java.security.NoSuchAlgorithmException e) { response.getWriter().println( "Problem executing crypto - javax.crypto.Cipher.getInstance(java.lang.String,java.security.Provider) Test Case"); e.printStackTrace(response.getWriter()); throw new ServletException(e); } catch (javax.crypto.NoSuchPaddingException e) { response.getWriter().println( "Problem executing crypto - javax.crypto.Cipher.getInstance(java.lang.String,java.security.Provider) Test Case"); e.printStackTrace(response.getWriter()); throw new ServletException(e); } catch (javax.crypto.IllegalBlockSizeException e) { response.getWriter().println( "Problem executing crypto - javax.crypto.Cipher.getInstance(java.lang.String,java.security.Provider) Test Case"); e.printStackTrace(response.getWriter()); throw new ServletException(e); } catch (javax.crypto.BadPaddingException e) { response.getWriter().println( "Problem executing crypto - javax.crypto.Cipher.getInstance(java.lang.String,java.security.Provider) Test Case"); e.printStackTrace(response.getWriter()); throw new ServletException(e); } catch (java.security.InvalidKeyException e) { response.getWriter().println( "Problem executing crypto - javax.crypto.Cipher.getInstance(java.lang.String,java.security.Provider) Test Case"); e.printStackTrace(response.getWriter()); throw new ServletException(e); } catch (java.security.InvalidAlgorithmParameterException e) { response.getWriter().println( "Problem executing crypto - javax.crypto.Cipher.getInstance(java.lang.String,java.security.Provider) Test Case"); e.printStackTrace(response.getWriter()); throw new ServletException(e); } response.getWriter().println( "Crypto Test javax.crypto.Cipher.getInstance(java.lang.String,java.security.Provider) executed"); } // end doPost private class Test { public String doSomething(String param) throws ServletException, IOException { String bar = org.apache.commons.lang.StringEscapeUtils.escapeHtml(param); return bar; } } // end innerclass Test } // end DataflowThruInnerClass