/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE15_External_Control_of_System_or_Configuration_Setting__getQueryString_Servlet_17.java
Label Definition File: CWE15_External_Control_of_System_or_Configuration_Setting.label.xml
Template File: sources-sink-17.tmpl.java
*/
/*
* @description
* CWE: 15 External Control of System or Configuration Setting
* BadSource: getQueryString_Servlet Parse id param out of the URL query string (without using getParameter())
* GoodSource: A hardcoded string
* BadSink:  Set the catalog name with the value of data
* Flow Variant: 17 Control flow: for loops
*
* */





import javax.servlet.http.*;

import java.util.StringTokenizer;

import java.sql.*;

import java.util.logging.Level;

public class CWE15_External_Control_of_System_or_Configuration_Setting__getQueryString_Servlet_17 extends AbstractTestCaseServlet
{
    /* uses badsource and badsink */
    public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

        data = ""; /* initialize data in case id is not in query string */

        /* POTENTIAL FLAW: Parse id param out of the URL querystring (without using getParameter()) */
        {
            StringTokenizer tokenizer = new StringTokenizer(request.getQueryString(), "&");
            while (tokenizer.hasMoreTokens())
            {
                String token = tokenizer.nextToken(); /* a token will be like "id=foo" */
                if(token.startsWith("id=")) /* check if we have the "id" parameter" */
                {
                    data = token.substring(3); /* set data to "foo" */
                    break; /* exit while loop */
                }
            }
        }

        for (int i = 0; i < 1; i++)
        {
            Connection dbConnection = null;
            try
            {
                dbConnection = IO.getDBConnection();
                /* POTENTIAL FLAW: Set the catalog name with the value of data
                 * allowing a nonexistent catalog name or unauthorized access to a portion of the DB */
                dbConnection.setCatalog(data);
            }
            catch (SQLException exceptSql)
            {
                IO.logger.log(Level.WARNING, "Error getting database connection", exceptSql);
            }
            finally
            {
                try
                {
                    if (dbConnection != null)
                    {
                        dbConnection.close();
                    }
                }
                catch (SQLException exceptSql)
                {
                    IO.logger.log(Level.WARNING, "Error closing Connection", exceptSql);
                }
            }
        }
    }

    /* goodG2B() - use goodsource and badsink by reversing the block outside the
     * for statement with the one in the for statement */
    private void goodG2B(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

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

        for (int i = 0; i < 1; i++)
        {
            Connection dbConnection = null;
            try
            {
                dbConnection = IO.getDBConnection();
                /* POTENTIAL FLAW: Set the catalog name with the value of data
                 * allowing a nonexistent catalog name or unauthorized access to a portion of the DB */
                dbConnection.setCatalog(data);
            }
            catch (SQLException exceptSql)
            {
                IO.logger.log(Level.WARNING, "Error getting database connection", exceptSql);
            }
            finally
            {
                try
                {
                    if (dbConnection != null)
                    {
                        dbConnection.close();
                    }
                }
                catch (SQLException exceptSql)
                {
                    IO.logger.log(Level.WARNING, "Error closing Connection", exceptSql);
                }
            }
        }
    }

    public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        goodG2B(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);
    }
}
