/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE121_Stack_Based_Buffer_Overflow__CWE129_listen_socket_62a.cpp
Label Definition File: CWE121_Stack_Based_Buffer_Overflow__CWE129.label.xml
Template File: sources-sinks-62a.tmpl.cpp
*/
/*
 * @description
 * CWE: 121 Stack Based Buffer Overflow
 * BadSource: listen_socket Read data using a listen socket (server side)
 * GoodSource: Larger than zero but less than 10
 * Sinks:
 *    GoodSink: Ensure the array index is valid
 *    BadSink : Improperly check the array index by not checking the upper bound
 * Flow Variant: 62 Data flow: data flows using a C++ reference from one function to another in different source files
 *
 * */

#include "std_testcase.h"

namespace CWE121_Stack_Based_Buffer_Overflow__CWE129_listen_socket_62
{

#ifndef OMITBAD

/* bad function declaration */
void badSource(int &data);

void bad()
{
    int data;
    /* Initialize data */
    data = -1;
    badSource(data);
    {
        int i;
        int buffer[10] = { 0 };
        /* POTENTIAL FLAW: Attempt to write to an index of the array that is above the upper bound
        * This code does check to see if the array index is negative */
        if (data >= 0)
        {
            buffer[data] = 1;
            /* Print the array values */
            for(i = 0; i < 10; i++)
            {
                printIntLine(buffer[i]);
            }
        }
        else
        {
            printLine("ERROR: Array index is negative.");
        }
    }
}

#endif /* OMITBAD */

#ifndef OMITGOOD

/* goodG2B uses the GoodSource with the BadSink */
void goodG2BSource(int &data);

static void goodG2B()
{
    int data;
    /* Initialize data */
    data = -1;
    goodG2BSource(data);
    {
        int i;
        int buffer[10] = { 0 };
        /* POTENTIAL FLAW: Attempt to write to an index of the array that is above the upper bound
        * This code does check to see if the array index is negative */
        if (data >= 0)
        {
            buffer[data] = 1;
            /* Print the array values */
            for(i = 0; i < 10; i++)
            {
                printIntLine(buffer[i]);
            }
        }
        else
        {
            printLine("ERROR: Array index is negative.");
        }
    }
}

/* goodB2G uses the BadSource with the GoodSink */
void goodB2GSource(int &data);

static void goodB2G()
{
    int data;
    /* Initialize data */
    data = -1;
    goodB2GSource(data);
    {
        int i;
        int buffer[10] = { 0 };
        /* FIX: Properly validate the array index and prevent a buffer overflow */
        if (data >= 0 && data < (10))
        {
            buffer[data] = 1;
            /* Print the array values */
            for(i = 0; i < 10; i++)
            {
                printIntLine(buffer[i]);
            }
        }
        else
        {
            printLine("ERROR: Array index is out-of-bounds");
        }
    }
}

void good()
{
    goodG2B();
    goodB2G();
}

#endif /* OMITGOOD */

} /* close namespace */

/* 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. */

#ifdef INCLUDEMAIN

using namespace CWE121_Stack_Based_Buffer_Overflow__CWE129_listen_socket_62; /* so that we can use good and bad easily */

int main(int argc, char * argv[])
{
    /* seed randomness */
    srand( (unsigned)time(NULL) );
#ifndef OMITGOOD
    printLine("Calling good()...");
    good();
    printLine("Finished good()");
#endif /* OMITGOOD */
#ifndef OMITBAD
    printLine("Calling bad()...");
    bad();
    printLine("Finished bad()");
#endif /* OMITBAD */
    return 0;
}

#endif
