text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE121_Stack_Based_Buffer_Overflow__src_wchar_t_alloca_cat_03.c
  Label Definition File: CWE121_Stack_Based_Buffer_Overflow__src.label.xml
  Template File: sources-sink-03.tmpl.c
  */
  /*
   * @description
   * CWE: 121 Stack Based Buffer Overflow
   * BadSource:  Initialize data as a large string
   * GoodSource: Initialize data as a small string
   * Sink: cat
   *    BadSink : Copy data to string using wcscat
   * Flow Variant: 03 Control flow: if(5==5) and if(5!=5)
   *
   * */
  
  #include "std_testcase.h"
  
  #include <wchar.h>
  
  #ifndef OMITBAD
  
  void CWE121_Stack_Based_Buffer_Overflow__src_wchar_t_alloca_cat_03_bad()
  {
      wchar_t * data;
      wchar_t * dataBuffer = (wchar_t *)ALLOCA(100*sizeof(wchar_t));
      data = dataBuffer;
      if(5==5)
      {
          /* FLAW: Initialize data as a large buffer that is larger than the small buffer used in the sink */
          wmemset(data, L'A', 100-1); /* fill with L'A's */
          data[100-1] = L'\0'; /* null terminate */
      }
      {
          wchar_t dest[50] = L"";
          /* POTENTIAL FLAW: Possible buffer overflow if data is larger than sizeof(dest)-wcslen(dest)*/
          wcscat(dest, data);
          printWLine(data);
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B1() - use goodsource and badsink by changing the 5==5 to 5!=5 */
  static void goodG2B1()
  {
      wchar_t * data;
      wchar_t * dataBuffer = (wchar_t *)ALLOCA(100*sizeof(wchar_t));
      data = dataBuffer;
      if(5!=5)
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          printLine("Benign, fixed string");
      }
      else
      {
          /* FIX: Initialize data as a small buffer that as small or smaller than the small buffer used in the sink */
          wmemset(data, L'A', 50-1); /* fill with L'A's */
          data[50-1] = L'\0'; /* null terminate */
      }
      {
          wchar_t dest[50] = L"";
          /* POTENTIAL FLAW: Possible buffer overflow if data is larger than sizeof(dest)-wcslen(dest)*/
          wcscat(dest, data);
          printWLine(data);
      }
  }
  
  /* goodG2B2() - use goodsource and badsink by reversing the blocks in the if statement */
  static void goodG2B2()
  {
      wchar_t * data;
      wchar_t * dataBuffer = (wchar_t *)ALLOCA(100*sizeof(wchar_t));
      data = dataBuffer;
      if(5==5)
      {
          /* FIX: Initialize data as a small buffer that as small or smaller than the small buffer used in the sink */
          wmemset(data, L'A', 50-1); /* fill with L'A's */
          data[50-1] = L'\0'; /* null terminate */
      }
      {
          wchar_t dest[50] = L"";
          /* POTENTIAL FLAW: Possible buffer overflow if data is larger than sizeof(dest)-wcslen(dest)*/
          wcscat(dest, data);
          printWLine(data);
      }
  }
  
  void CWE121_Stack_Based_Buffer_Overflow__src_wchar_t_alloca_cat_03_good()
  {
      goodG2B1();
      goodG2B2();
  }
  
  #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__src_wchar_t_alloca_cat_03_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE121_Stack_Based_Buffer_Overflow__src_wchar_t_alloca_cat_03_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  