text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE121_Stack_Based_Buffer_Overflow__CWE193_wchar_t_alloca_ncpy_03.c
  Label Definition File: CWE121_Stack_Based_Buffer_Overflow__CWE193.label.xml
  Template File: sources-sink-03.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: ncpy
   *    BadSink : Copy string to data using wcsncpy()
   * Flow Variant: 03 Control flow: if(5==5) and if(5!=5)
   *
   * */
  
  #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_ncpy_03_bad()
  {
      wchar_t * data;
      wchar_t * dataBadBuffer = (wchar_t *)ALLOCA((10)*sizeof(wchar_t));
      wchar_t * dataGoodBuffer = (wchar_t *)ALLOCA((10+1)*sizeof(wchar_t));
      if(5==5)
      {
          /* 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 */
      }
      {
          wchar_t source[10+1] = SRC_STRING;
          /* Copy length + 1 to include NUL terminator from source */
          /* POTENTIAL FLAW: data may not have enough space to hold source */
          wcsncpy(data, source, wcslen(source) + 1);
          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 * dataBadBuffer = (wchar_t *)ALLOCA((10)*sizeof(wchar_t));
      wchar_t * dataGoodBuffer = (wchar_t *)ALLOCA((10+1)*sizeof(wchar_t));
      if(5!=5)
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          printLine("Benign, fixed string");
      }
      else
      {
          /* 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 */
      }
      {
          wchar_t source[10+1] = SRC_STRING;
          /* Copy length + 1 to include NUL terminator from source */
          /* POTENTIAL FLAW: data may not have enough space to hold source */
          wcsncpy(data, source, wcslen(source) + 1);
          printWLine(data);
      }
  }
  
  /* goodG2B2() - use goodsource and badsink by reversing the blocks in the if statement */
  static void goodG2B2()
  {
      wchar_t * data;
      wchar_t * dataBadBuffer = (wchar_t *)ALLOCA((10)*sizeof(wchar_t));
      wchar_t * dataGoodBuffer = (wchar_t *)ALLOCA((10+1)*sizeof(wchar_t));
      if(5==5)
      {
          /* 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 */
      }
      {
          wchar_t source[10+1] = SRC_STRING;
          /* Copy length + 1 to include NUL terminator from source */
          /* POTENTIAL FLAW: data may not have enough space to hold source */
          wcsncpy(data, source, wcslen(source) + 1);
          printWLine(data);
      }
  }
  
  void CWE121_Stack_Based_Buffer_Overflow__CWE193_wchar_t_alloca_ncpy_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__CWE193_wchar_t_alloca_ncpy_03_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE121_Stack_Based_Buffer_Overflow__CWE193_wchar_t_alloca_ncpy_03_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  