/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE80_XSS__CWE182_Servlet_PropertiesFile_03.java
Label Definition File: CWE80_XSS__CWE182_Servlet.label.xml
Template File: sources-sink-03.tmpl.java
*/
/*
* @description
* CWE: 80 Cross Site Scripting (XSS)
* BadSource: PropertiesFile Read data from a .properties file (in property named data)
* GoodSource: A hardcoded string
* BadSink:  Display of data in web page after using replaceAll() to remove script tags, which will still allow XSS (CWE 182: Collapse of Data into Unsafe Value)
* Flow Variant: 03 Control flow: if(5==5) and if(5!=5)
*
* */




import javax.servlet.http.*;

import java.util.Properties;

import java.io.FileInputStream;
import java.io.IOException;

import java.util.logging.Level;

public class CWE80_XSS__CWE182_Servlet_PropertiesFile_03 extends AbstractTestCaseServlet
{
    /* uses badsource and badsink */
    public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;
        if (5 == 5)
        {
            data = ""; /* Initialize data */
            /* retrieve the property */
            {
                Properties properties = new Properties();
                FileInputStream streamFileInput = null;
                try
                {
                    streamFileInput = new FileInputStream("../common/config.properties");
                    properties.load(streamFileInput);
                    /* POTENTIAL FLAW: Read data from a .properties file */
                    data = properties.getProperty("data");
                }
                catch (IOException exceptIO)
                {
                    IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO);
                }
                finally
                {
                    /* Close stream reading object */
                    try
                    {
                        if (streamFileInput != null)
                        {
                            streamFileInput.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing FileInputStream", exceptIO);
                    }
                }
            }
        }
        else
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run
             * but ensure data is inititialized before the Sink to avoid compiler errors */
            data = null;
        }

        if (data != null)
        {
            /* POTENTIAL FLAW: Display of data in web page after using replaceAll() to remove script tags, which will still allow XSS with strings like <scr<script>ipt> (CWE 182: Collapse of Data into Unsafe Value) */
            response.getWriter().println("<br>bad(): data = " + data.replaceAll("(<script>)", ""));
        }

    }

    /* goodG2B1() - use goodsource and badsink by changing 5==5 to 5!=5 */
    private void goodG2B1(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;
        if (5 != 5)
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run
             * but ensure data is inititialized before the Sink to avoid compiler errors */
            data = null;
        }
        else
        {

            /* FIX: Use a hardcoded string */
            data = "foo";

        }

        if (data != null)
        {
            /* POTENTIAL FLAW: Display of data in web page after using replaceAll() to remove script tags, which will still allow XSS with strings like <scr<script>ipt> (CWE 182: Collapse of Data into Unsafe Value) */
            response.getWriter().println("<br>bad(): data = " + data.replaceAll("(<script>)", ""));
        }

    }

    /* goodG2B2() - use goodsource and badsink by reversing statements in if */
    private void goodG2B2(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;
        if (5 == 5)
        {
            /* FIX: Use a hardcoded string */
            data = "foo";
        }
        else
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run
             * but ensure data is inititialized before the Sink to avoid compiler errors */
            data = null;
        }

        if (data != null)
        {
            /* POTENTIAL FLAW: Display of data in web page after using replaceAll() to remove script tags, which will still allow XSS with strings like <scr<script>ipt> (CWE 182: Collapse of Data into Unsafe Value) */
            response.getWriter().println("<br>bad(): data = " + data.replaceAll("(<script>)", ""));
        }

    }

    public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        goodG2B1(request, response);
        goodG2B2(request, response);
    }

    /* Below is the main(). It is only used when building this testcase on
     * its own for testing or for building a binary to use in testing binary
     * analysis tools. It is not used when compiling all the testcases as one
     * application, which is how source code analysis tools are tested.
     */
    public static void main(String[] args) throws ClassNotFoundException,
           InstantiationException, IllegalAccessException
    {
        mainFromParent(args);
    }
}
