/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE121_Stack_Based_Buffer_Overflow__CWE193_wchar_t_alloca_cpy_32.c
Label Definition File: CWE121_Stack_Based_Buffer_Overflow__CWE193.label.xml
Template File: sources-sink-32.tmpl.c
*/
/*
 * @description
 * CWE: 121 Stack Based Buffer Overflow
 * BadSource:  Point data to a buffer that does not have space for a NULL terminator
 * GoodSource: Point data to a buffer that includes space for a NULL terminator
 * Sink: cpy
 *    BadSink : Copy string to data using wcscpy()
 * Flow Variant: 32 Data flow using two pointers to the same value within the same function
 *
 * */

#include "std_testcase.h"

#ifndef _WIN32
#include <wchar.h>
#endif

/* MAINTENANCE NOTE: The length of this string should equal the 10 */
#define SRC_STRING L"AAAAAAAAAA"

#ifndef OMITBAD

void CWE121_Stack_Based_Buffer_Overflow__CWE193_wchar_t_alloca_cpy_32_bad()
{
    wchar_t * data;
    wchar_t * *dataPtr1 = &data;
    wchar_t * *dataPtr2 = &data;
    wchar_t * dataBadBuffer = (wchar_t *)ALLOCA((10)*sizeof(wchar_t));
    wchar_t * dataGoodBuffer = (wchar_t *)ALLOCA((10+1)*sizeof(wchar_t));
    {
        wchar_t * data = *dataPtr1;
        /* FLAW: Set a pointer to a buffer that does not leave room for a NULL terminator when performing
         * string copies in the sinks  */
        data = dataBadBuffer;
        data[0] = L'\0'; /* null terminate */
        *dataPtr1 = data;
    }
    {
        wchar_t * data = *dataPtr2;
        {
            wchar_t source[10+1] = SRC_STRING;
            /* POTENTIAL FLAW: data may not have enough space to hold source */
            wcscpy(data, source);
            printWLine(data);
        }
    }
}

#endif /* OMITBAD */

#ifndef OMITGOOD

/* goodG2B() uses the GoodSource with the BadSink */
static void goodG2B()
{
    wchar_t * data;
    wchar_t * *dataPtr1 = &data;
    wchar_t * *dataPtr2 = &data;
    wchar_t * dataBadBuffer = (wchar_t *)ALLOCA((10)*sizeof(wchar_t));
    wchar_t * dataGoodBuffer = (wchar_t *)ALLOCA((10+1)*sizeof(wchar_t));
    {
        wchar_t * data = *dataPtr1;
        /* FIX: Set a pointer to a buffer that leaves room for a NULL terminator when performing
         * string copies in the sinks  */
        data = dataGoodBuffer;
        data[0] = L'\0'; /* null terminate */
        *dataPtr1 = data;
    }
    {
        wchar_t * data = *dataPtr2;
        {
            wchar_t source[10+1] = SRC_STRING;
            /* POTENTIAL FLAW: data may not have enough space to hold source */
            wcscpy(data, source);
            printWLine(data);
        }
    }
}

void CWE121_Stack_Based_Buffer_Overflow__CWE193_wchar_t_alloca_cpy_32_good()
{
    goodG2B();
}

#endif /* OMITGOOD */

/* 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

int main(int argc, char * argv[])
{
    /* seed randomness */
    srand( (unsigned)time(NULL) );
#ifndef OMITGOOD
    printLine("Calling good()...");
    CWE121_Stack_Based_Buffer_Overflow__CWE193_wchar_t_alloca_cpy_32_good();
    printLine("Finished good()");
#endif /* OMITGOOD */
#ifndef OMITBAD
    printLine("Calling bad()...");
    CWE121_Stack_Based_Buffer_Overflow__CWE193_wchar_t_alloca_cpy_32_bad();
    printLine("Finished bad()");
#endif /* OMITBAD */
    return 0;
}

#endif
