/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE89_SQL_Injection__getCookies_Servlet_prepareStatement_01.java
Label Definition File: CWE89_SQL_Injection.label.xml
Template File: sources-sinks-01.tmpl.java
*/
/*
* @description
* CWE: 89 SQL Injection
* BadSource: getCookies_Servlet Read data from the first cookie using getCookies()
* GoodSource: A hardcoded string
* Sinks: prepareStatement
*    GoodSink: Use prepared statement and execute (properly)
*    BadSink : data concatenated into SQL statement used in prepareStatement() call, which could result in SQL Injection
* Flow Variant: 01 Baseline
*
* */




import javax.servlet.http.*;


import java.sql.*;

import java.util.logging.Level;

public class CWE89_SQL_Injection__getCookies_Servlet_prepareStatement_01 extends AbstractTestCaseServlet
{
    public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

        data = ""; /* initialize data in case there are no cookies */

        /* Read data from cookies */
        {
            Cookie cookieSources[] = request.getCookies();
            if (cookieSources != null)
            {
                /* POTENTIAL FLAW: Read data from the first cookie value */
                data = cookieSources[0].getValue();
            }
        }

        Connection dbConnection = null;
        PreparedStatement sqlStatement = null;

        try
        {
            /* POTENTIAL FLAW: data concatenated into SQL statement used in prepareStatement() call, which could result in SQL Injection */
            dbConnection = IO.getDBConnection();
            sqlStatement = dbConnection.prepareStatement("insert into users (status) values ('updated') where name='"+data+"'");

            Boolean result = sqlStatement.execute();

            if (result)
            {
                IO.writeLine("Name, " + data + ", updated successfully");
            }
            else
            {
                IO.writeLine("Unable to update records for user: " + data);
            }
        }
        catch (SQLException exceptSql)
        {
            IO.logger.log(Level.WARNING, "Error getting database connection", exceptSql);
        }
        finally
        {
            try
            {
                if (sqlStatement != null)
                {
                    sqlStatement.close();
                }
            }
            catch (SQLException exceptSql)
            {
                IO.logger.log(Level.WARNING, "Error closing PreparedStatement", exceptSql);
            }

            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);
        goodB2G(request, response);
    }

    /* goodG2B() - use goodsource and badsink */
    private void goodG2B(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

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

        Connection dbConnection = null;
        PreparedStatement sqlStatement = null;

        try
        {
            /* POTENTIAL FLAW: data concatenated into SQL statement used in prepareStatement() call, which could result in SQL Injection */
            dbConnection = IO.getDBConnection();
            sqlStatement = dbConnection.prepareStatement("insert into users (status) values ('updated') where name='"+data+"'");

            Boolean result = sqlStatement.execute();

            if (result)
            {
                IO.writeLine("Name, " + data + ", updated successfully");
            }
            else
            {
                IO.writeLine("Unable to update records for user: " + data);
            }
        }
        catch (SQLException exceptSql)
        {
            IO.logger.log(Level.WARNING, "Error getting database connection", exceptSql);
        }
        finally
        {
            try
            {
                if (sqlStatement != null)
                {
                    sqlStatement.close();
                }
            }
            catch (SQLException exceptSql)
            {
                IO.logger.log(Level.WARNING, "Error closing PreparedStatement", exceptSql);
            }

            try
            {
                if (dbConnection != null)
                {
                    dbConnection.close();
                }
            }
            catch (SQLException exceptSql)
            {
                IO.logger.log(Level.WARNING, "Error closing Connection", exceptSql);
            }
        }

    }

    /* goodB2G() - use badsource and goodsink */
    private void goodB2G(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

        data = ""; /* initialize data in case there are no cookies */

        /* Read data from cookies */
        {
            Cookie cookieSources[] = request.getCookies();
            if (cookieSources != null)
            {
                /* POTENTIAL FLAW: Read data from the first cookie value */
                data = cookieSources[0].getValue();
            }
        }

        Connection dbConnection = null;
        PreparedStatement sqlStatement = null;

        try
        {
            /* FIX: Use prepared statement and execute (properly) */
            dbConnection = IO.getDBConnection();
            sqlStatement = dbConnection.prepareStatement("insert into users (status) values ('updated') where name=?");
            sqlStatement.setString(1, data);

            Boolean result = sqlStatement.execute();

            if (result)
            {
                IO.writeLine("Name, " + data + ", updated successfully");
            }
            else
            {
                IO.writeLine("Unable to update records for user: " + data);
            }
        }
        catch (SQLException exceptSql)
        {
            IO.logger.log(Level.WARNING, "Error getting database connection", exceptSql);
        }
        finally
        {
            try
            {
                if (sqlStatement != null)
                {
                    sqlStatement.close();
                }
            }
            catch (SQLException exceptSql)
            {
                IO.logger.log(Level.WARNING, "Error closing PreparedStatement", exceptSql);
            }

            try
            {
                if (dbConnection != null)
                {
                    dbConnection.close();
                }
            }
            catch (SQLException exceptSql)
            {
                IO.logger.log(Level.WARNING, "Error closing Connection", exceptSql);
            }
        }

    }

    /* 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);
    }
}

