text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE121_Stack_Based_Buffer_Overflow__src_wchar_t_declare_ncat_45.c
  Label Definition File: CWE121_Stack_Based_Buffer_Overflow__src.string.label.xml
  Template File: sources-sink-45.tmpl.c
  */
  /*
   * @description
   * CWE: 121 Stack Based Buffer Overflow
   * BadSource:  Initialize data as a large string
   * GoodSource: Initialize data as a small string
   * Sinks: ncat
   *    BadSink : Copy data to string using wcsncat
   * Flow Variant: 45 Data flow: data passed as a static global variable from one function to another in the same source file
   *
   * */
  
  #include "std_testcase.h"
  
  #include <wchar.h>
  
  static wchar_t * CWE121_Stack_Based_Buffer_Overflow__src_wchar_t_declare_ncat_45_bad_data;
  static wchar_t * CWE121_Stack_Based_Buffer_Overflow__src_wchar_t_declare_ncat_45_goodG2B_data;
  
  #ifndef OMITBAD
  
  static void bad_sink()
  {
      wchar_t * data = CWE121_Stack_Based_Buffer_Overflow__src_wchar_t_declare_ncat_45_bad_data;
      {
          wchar_t dest[50] = L"";
          /* POTENTIAL FLAW: Possible buffer overflow if data is larger than sizeof(dest)-wcslen(dest)*/
          wcsncat(dest, data, wcslen(data));
          dest[50-1] = L'\0'; /* Ensure the destination buffer is null terminated */
          printWLine(data);
      }
  }
  
  void CWE121_Stack_Based_Buffer_Overflow__src_wchar_t_declare_ncat_45_bad()
  {
      wchar_t * data;
      wchar_t data_buf[100];
      data = data_buf;
      /* 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 */
      CWE121_Stack_Based_Buffer_Overflow__src_wchar_t_declare_ncat_45_bad_data = data;
      bad_sink();
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B() uses the GoodSource with the BadSink */
  static void goodG2B_sink()
  {
      wchar_t * data = CWE121_Stack_Based_Buffer_Overflow__src_wchar_t_declare_ncat_45_goodG2B_data;
      {
          wchar_t dest[50] = L"";
          /* POTENTIAL FLAW: Possible buffer overflow if data is larger than sizeof(dest)-wcslen(dest)*/
          wcsncat(dest, data, wcslen(data));
          dest[50-1] = L'\0'; /* Ensure the destination buffer is null terminated */
          printWLine(data);
      }
  }
  
  static void goodG2B()
  {
      wchar_t * data;
      wchar_t data_buf[100];
      data = data_buf;
      /* 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 */
      CWE121_Stack_Based_Buffer_Overflow__src_wchar_t_declare_ncat_45_goodG2B_data = data;
      goodG2B_sink();
  }
  
  void CWE121_Stack_Based_Buffer_Overflow__src_wchar_t_declare_ncat_45_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__src_wchar_t_declare_ncat_45_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE121_Stack_Based_Buffer_Overflow__src_wchar_t_declare_ncat_45_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  