/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE78_OS_Command_Injection__getParameter_Servlet_17.java
Label Definition File: CWE78_OS_Command_Injection.label.xml
Template File: sources-sink-17.tmpl.java
*/
/*
* @description
* CWE: 78 OS Command Injection
* BadSource: getParameter_Servlet Read data from a querystring using getParameter()
* GoodSource: A hardcoded string
* BadSink: exec dynamic command execution with Runtime.getRuntime().exec()
* Flow Variant: 17 Control flow: for loops
*
* */





import javax.servlet.http.*;


public class CWE78_OS_Command_Injection__getParameter_Servlet_17 extends AbstractTestCaseServlet
{
    /* uses badsource and badsink */
    public void bad(HttpServletRequest request, HttpServletResponse response) throws Throwable
    {
        String data;

        /* POTENTIAL FLAW: Read data from a querystring using getParameter */
        data = request.getParameter("name");

        for (int i = 0; i < 1; i++)
        {
            String osCommand;
            if(System.getProperty("os.name").toLowerCase().indexOf("win") >= 0)
            {
                /* running on Windows */
                osCommand = "c:\\WINDOWS\\SYSTEM32\\cmd.exe /c dir ";
            }
            else
            {
                /* running on non-Windows */
                osCommand = "/bin/ls ";
            }
            /* POTENTIAL FLAW: command injection */
            Process process = Runtime.getRuntime().exec(osCommand + data);
            process.waitFor();
        }
    }

    /* 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++)
        {
            String osCommand;
            if(System.getProperty("os.name").toLowerCase().indexOf("win") >= 0)
            {
                /* running on Windows */
                osCommand = "c:\\WINDOWS\\SYSTEM32\\cmd.exe /c dir ";
            }
            else
            {
                /* running on non-Windows */
                osCommand = "/bin/ls ";
            }
            /* POTENTIAL FLAW: command injection */
            Process process = Runtime.getRuntime().exec(osCommand + data);
            process.waitFor();
        }
    }

    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);
    }
}
