/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE89_SQL_Injection__getCookies_Servlet_executeUpdate_21.java
Label Definition File: CWE89_SQL_Injection.label.xml
Template File: sources-sinks-21.tmpl.java
*/
/*
 * @description
 * CWE: 89 SQL Injection
 * BadSource: getCookies_Servlet Read data from the first cookie using getCookies()
 * GoodSource: A hardcoded string
 * Sinks: executeUpdate
 *    GoodSink: Use prepared statement and executeUpdate (properly)
 *    BadSink : data concatenated into SQL statement used in executeUpdate(), which could result in SQL Injection
 * Flow Variant: 21 Control flow: Flow controlled by value of a private variable. All functions contained in one file.
 *
 * */




import javax.servlet.http.*;


import java.sql.*;

import java.util.logging.Level;

public class CWE89_SQL_Injection__getCookies_Servlet_executeUpdate_21 extends AbstractTestCaseServlet
{
    /* The variable below is used to drive control flow in the sink function */
    private boolean badPrivate = false;

    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();
            }
        }

        badPrivate = true;
        badSink(data , request, response);
    }

    private void badSink(String data , HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        if (badPrivate)
        {
            Connection dbConnection = null;
            Statement sqlStatement = null;
            try
            {
                dbConnection = IO.getDBConnection();
                sqlStatement = dbConnection.createStatement();
                /* POTENTIAL FLAW: data concatenated into SQL statement used in executeUpdate(), which could result in SQL Injection */
                int rowCount = sqlStatement.executeUpdate("insert into users (status) values ('updated') where name='"+data+"'");
                IO.writeLine("Updated " + rowCount + " rows successfully.");
            }
            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 Statement", exceptSql);
                }

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

    /* The variables below are used to drive control flow in the sink functions. */
    private boolean goodB2G1Private = false;
    private boolean goodB2G2Private = false;
    private boolean goodG2BPrivate = false;

    public void good(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        goodB2G1(request, response);
        goodB2G2(request, response);
        goodG2B(request, response);
    }

    /* goodB2G1() - use BadSource and GoodSink by setting the variable to false instead of true */
    private void goodB2G1(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();
            }
        }

        goodB2G1Private = false;
        goodB2G1Sink(data , request, response);
    }

    private void goodB2G1Sink(String data , HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        if (goodB2G1Private)
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
            IO.writeLine("Benign, fixed string");
        }
        else
        {

            Connection dbConnection = null;
            PreparedStatement sqlStatement = null;

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

                int rowCount = sqlStatement.executeUpdate();

                IO.writeLine("Updated " + rowCount + " rows successfully.");
            }
            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);
                }
            }

        }
    }

    /* goodB2G2() - use BadSource and GoodSink by reversing the blocks in the if in the sink function */
    private void goodB2G2(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();
            }
        }

        goodB2G2Private = true;
        goodB2G2Sink(data , request, response);
    }

    private void goodB2G2Sink(String data , HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        if (goodB2G2Private)
        {
            Connection dbConnection = null;
            PreparedStatement sqlStatement = null;
            try
            {
                /* FIX: Use prepared statement and executeUpdate (properly) */
                dbConnection = IO.getDBConnection();
                sqlStatement = dbConnection.prepareStatement("insert into users (status) values ('updated') where name=?");
                sqlStatement.setString(1, data);
                int rowCount = sqlStatement.executeUpdate();
                IO.writeLine("Updated " + rowCount + " rows successfully.");
            }
            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);
                }
            }
        }
    }

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

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

        goodG2BPrivate = true;
        goodG2BSink(data , request, response);
    }

    private void goodG2BSink(String data , HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        if (goodG2BPrivate)
        {
            Connection dbConnection = null;
            Statement sqlStatement = null;
            try
            {
                dbConnection = IO.getDBConnection();
                sqlStatement = dbConnection.createStatement();
                /* POTENTIAL FLAW: data concatenated into SQL statement used in executeUpdate(), which could result in SQL Injection */
                int rowCount = sqlStatement.executeUpdate("insert into users (status) values ('updated') where name='"+data+"'");
                IO.writeLine("Updated " + rowCount + " rows successfully.");
            }
            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 Statement", 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);
    }
}
