/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE122_Heap_Based_Buffer_Overflow__c_CWE806_char_snprintf_66a.c
Label Definition File: CWE122_Heap_Based_Buffer_Overflow__c_CWE806.label.xml
Template File: sources-sink-66a.tmpl.c
*/
/*
 * @description
 * CWE: 122 Heap Based Buffer Overflow
 * BadSource:  Initialize data as a large string
 * GoodSource: Initialize data as a small string
 * Sinks: snprintf
 *    BadSink : Copy data to string using snprintf
 * Flow Variant: 66 Data flow: data passed in an array from one function to another in different source files
 *
 * */

#include "std_testcase.h"

#include <wchar.h>

#ifdef _WIN32
#define SNPRINTF _snprintf
#else
#define SNPRINTF snprintf
#endif

#ifndef OMITBAD

/* bad function declaration */
void CWE122_Heap_Based_Buffer_Overflow__c_CWE806_char_snprintf_66b_badSink(char * dataArray[]);

void CWE122_Heap_Based_Buffer_Overflow__c_CWE806_char_snprintf_66_bad()
{
    char * data;
    char * dataArray[5];
    data = (char *)malloc(100*sizeof(char));
    if (data == NULL) {exit(-1);}
    /* FLAW: Initialize data as a large buffer that is larger than the small buffer used in the sink */
    memset(data, 'A', 100-1); /* fill with 'A's */
    data[100-1] = '\0'; /* null terminate */
    /* put data in array */
    dataArray[2] = data;
    CWE122_Heap_Based_Buffer_Overflow__c_CWE806_char_snprintf_66b_badSink(dataArray);
}

#endif /* OMITBAD */

#ifndef OMITGOOD

/* goodG2B uses the GoodSource with the BadSink */
void CWE122_Heap_Based_Buffer_Overflow__c_CWE806_char_snprintf_66b_goodG2BSink(char * dataArray[]);

static void goodG2B()
{
    char * data;
    char * dataArray[5];
    data = (char *)malloc(100*sizeof(char));
    if (data == NULL) {exit(-1);}
    /* FIX: Initialize data as a small buffer that as small or smaller than the small buffer used in the sink */
    memset(data, 'A', 50-1); /* fill with 'A's */
    data[50-1] = '\0'; /* null terminate */
    dataArray[2] = data;
    CWE122_Heap_Based_Buffer_Overflow__c_CWE806_char_snprintf_66b_goodG2BSink(dataArray);
}

void CWE122_Heap_Based_Buffer_Overflow__c_CWE806_char_snprintf_66_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()...");
    CWE122_Heap_Based_Buffer_Overflow__c_CWE806_char_snprintf_66_good();
    printLine("Finished good()");
#endif /* OMITGOOD */
#ifndef OMITBAD
    printLine("Calling bad()...");
    CWE122_Heap_Based_Buffer_Overflow__c_CWE806_char_snprintf_66_bad();
    printLine("Finished bad()");
#endif /* OMITBAD */
    return 0;
}

#endif
