/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE643_Xpath_Injection__Environment_75b.java
Label Definition File: CWE643_Xpath_Injection.label.xml
Template File: sources-sinks-75b.tmpl.java
*/
/*
 * @description
 * CWE: 643 Xpath Injection
 * BadSource: Environment Read data from an environment variable
 * GoodSource: A hardcoded string
 * Sinks:
 *    GoodSink: validate input through StringEscapeUtils
 *    BadSink : user input is used without validate
 * Flow Variant: 75 Data flow: data passed in a serialized object from one method to another in different source files in the same package
 *
 * */




import java.io.ByteArrayInputStream;
import java.io.ObjectInputStream;
import java.io.IOException;
import java.util.logging.Level;



import javax.xml.xpath.*;

import org.xml.sax.InputSource;

import org.apache.commons.lang.StringEscapeUtils;

public class CWE643_Xpath_Injection__Environment_75b
{
    public void badSink(byte[] dataSerialized ) throws Throwable
    {
        /* unserialize data */
        ByteArrayInputStream streamByteArrayInput = null;
        ObjectInputStream streamObjectInput = null;

        try
        {
            streamByteArrayInput = new ByteArrayInputStream(dataSerialized);
            streamObjectInput = new ObjectInputStream(streamByteArrayInput);
            String data = (String)streamObjectInput.readObject();

            String xmlFile = null;
            if(System.getProperty("os.name").toLowerCase().indexOf("win") >= 0)
            {
                /* running on Windows */
                xmlFile = "\\src\\testcases\\CWE643_Xpath Injection\\CWE643_Xpath_Injection__Helper.xml";
            }
            else
            {
                /* running on non-Windows */
                xmlFile = "./src/testcases/CWE643_Xpath Injection/CWE643_Xpath_Injection__Helper.xml";
            }

            if (data != null)
            {
                /* assume username||password as source */
                String [] tokens = data.split("||");
                if (tokens.length < 2)
                {
                    return;
                }
                String username = tokens[0];
                String password = tokens[1];
                /* build xpath */
                XPath xPath = XPathFactory.newInstance().newXPath();
                InputSource inputXml = new InputSource(xmlFile);
                /* INCIDENTAL: CWE180 Incorrect Behavior Order: Validate Before Canonicalize
                 *     The user input should be canonicalized before validation. */
                /* POTENTIAL FLAW: user input is used without validate */
                String query = "//users/user[name/text()='" + username +
                               "' and pass/text()='" + password + "']" +
                               "/secret/text()";
                String secret = (String)xPath.evaluate(query, inputXml, XPathConstants.STRING);
            }

        }
        catch (IOException exceptIO)
        {
            IO.logger.log(Level.WARNING, "IOException in deserialization", exceptIO);
        }
        catch (ClassNotFoundException exceptClassNotFound)
        {
            IO.logger.log(Level.WARNING, "ClassNotFoundException in deserialization", exceptClassNotFound);
        }
        finally
        {
            /* clean up stream reading objects */
            try
            {
                if (streamObjectInput != null)
                {
                    streamObjectInput.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing ObjectInputStream", exceptIO);
            }

            try
            {
                if (streamByteArrayInput != null)
                {
                    streamByteArrayInput.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing ByteArrayInputStream", exceptIO);
            }
        }
    }

    /* goodG2B() - use GoodSource and BadSink */
    public void goodG2BSink(byte[] dataSerialized ) throws Throwable
    {
        /* unserialize data */
        ByteArrayInputStream streamByteArrayInput = null;
        ObjectInputStream streamObjectInput = null;

        try {
            streamByteArrayInput = new ByteArrayInputStream(dataSerialized);
            streamObjectInput = new ObjectInputStream(streamByteArrayInput);
            String data = (String)streamObjectInput.readObject();

            String xmlFile = null;
            if(System.getProperty("os.name").toLowerCase().indexOf("win") >= 0)
            {
                /* running on Windows */
                xmlFile = "\\src\\testcases\\CWE643_Xpath Injection\\CWE643_Xpath_Injection__Helper.xml";
            }
            else
            {
                /* running on non-Windows */
                xmlFile = "./src/testcases/CWE643_Xpath Injection/CWE643_Xpath_Injection__Helper.xml";
            }

            if (data != null)
            {
                /* assume username||password as source */
                String [] tokens = data.split("||");
                if (tokens.length < 2)
                {
                    return;
                }
                String username = tokens[0];
                String password = tokens[1];
                /* build xpath */
                XPath xPath = XPathFactory.newInstance().newXPath();
                InputSource inputXml = new InputSource(xmlFile);
                /* INCIDENTAL: CWE180 Incorrect Behavior Order: Validate Before Canonicalize
                 *     The user input should be canonicalized before validation. */
                /* POTENTIAL FLAW: user input is used without validate */
                String query = "//users/user[name/text()='" + username +
                               "' and pass/text()='" + password + "']" +
                               "/secret/text()";
                String secret = (String)xPath.evaluate(query, inputXml, XPathConstants.STRING);
            }

        }
        catch (IOException exceptIO)
        {
            IO.logger.log(Level.WARNING, "IOException in deserialization", exceptIO);
        }
        catch (ClassNotFoundException exceptClassNotFound)
        {
            IO.logger.log(Level.WARNING, "ClassNotFoundException in deserialization", exceptClassNotFound);
        }
        finally
        {
            /* clean up stream reading objects */
            try
            {
                if (streamObjectInput != null)
                {
                    streamObjectInput.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing ObjectInputStream", exceptIO);
            }

            try
            {
                if (streamByteArrayInput != null)
                {
                    streamByteArrayInput.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing ByteArrayInputStream", exceptIO);
            }
        }
    }

    /* goodB2G() - use BadSource and GoodSink */
    public void goodB2GSink(byte[] dataSerialized ) throws Throwable
    {
        /* unserialize data */
        ByteArrayInputStream streamByteArrayInput = null;
        ObjectInputStream streamObjectInput = null;

        try
        {
            streamByteArrayInput = new ByteArrayInputStream(dataSerialized);
            streamObjectInput = new ObjectInputStream(streamByteArrayInput);
            String data = (String)streamObjectInput.readObject();

            String xmlFile = null;
            if(System.getProperty("os.name").toLowerCase().indexOf("win") >= 0)
            {
                /* running on Windows */
                xmlFile = "\\src\\testcases\\CWE643_Xpath Injection\\CWE643_Xpath_Injection__Helper.xml";
            }
            else
            {
                /* running on non-Windows */
                xmlFile = "./src/testcases/CWE643_Xpath Injection/CWE643_Xpath_Injection__Helper.xml";
            }

            if (data != null)
            {
                /* assume username||password as source */
                String [] tokens = data.split("||");
                if( tokens.length < 2 )
                {
                    return;
                }
                /* FIX: validate input using StringEscapeUtils */
                String username = StringEscapeUtils.escapeXml(tokens[0]);
                String password = StringEscapeUtils.escapeXml(tokens[1]);
                /* build xpath */
                XPath xPath = XPathFactory.newInstance().newXPath();
                InputSource inputXml = new InputSource(xmlFile);
                String query = "//users/user[name/text()='" + username +
                               "' and pass/text()='" + password + "']" +
                               "/secret/text()";
                String secret = (String)xPath.evaluate(query, inputXml, XPathConstants.STRING);
            }

        }
        catch (IOException exceptIO)
        {
            IO.logger.log(Level.WARNING, "IOException in deserialization", exceptIO);
        }
        catch (ClassNotFoundException exceptClassNotFound)
        {
            IO.logger.log(Level.WARNING, "ClassNotFoundException in deserialization", exceptClassNotFound);
        }
        finally
        {
            /* clean up stream reading objects */
            try
            {
                if (streamObjectInput != null)
                {
                    streamObjectInput.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing ObjectInputStream", exceptIO);
            }

            try
            {
                if (streamByteArrayInput != null)
                {
                    streamByteArrayInput.close();
                }
            }
            catch (IOException exceptIO)
            {
                IO.logger.log(Level.WARNING, "Error closing ByteArrayInputStream", exceptIO);
            }
        }
    }
}
