text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE121_Stack_Based_Buffer_Overflow__dest_wchar_t_alloca_ncat_07.c
  Label Definition File: CWE121_Stack_Based_Buffer_Overflow__dest.string.label.xml
  Template File: sources-sink-07.tmpl.c
  */
  /*
   * @description
   * CWE: 121 Stack Based Buffer Overflow
   * BadSource:  Set data pointer to the bad buffer
   * GoodSource: Set data pointer to the good buffer
   * Sink: ncat
   *    BadSink : Copy string to data using wcsncat
   * Flow Variant: 07 Control flow: if(static_five==5) and if(static_five!=5)
   *
   * */
  
  #include "std_testcase.h"
  
  #include <wchar.h>
  
  /* The variable below is not declared "const", but is never assigned
     any other value so a tool should be able to identify that reads of
     this will always give its initialized value. */
  static int static_five = 5;
  
  #ifndef OMITBAD
  
  void CWE121_Stack_Based_Buffer_Overflow__dest_wchar_t_alloca_ncat_07_bad()
  {
      wchar_t * data;
      wchar_t * data_badbuf = (wchar_t *)ALLOCA(50*sizeof(wchar_t));
      wchar_t * data_goodbuf = (wchar_t *)ALLOCA(100*sizeof(wchar_t));
      if(static_five==5)
      {
          /* FLAW: Set a pointer to a "small" buffer. This buffer will be used in the sinks as a destination
           * buffer in various memory copying functions using a "large" source buffer. */
          data = data_badbuf;
          data[0] = L'\0'; /* null terminate */
      }
      else
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          /* FIX: Set a pointer to a "large" buffer, thus avoiding buffer overflows in the sinks. */
          data = data_goodbuf;
          data[0] = L'\0'; /* null terminate */
      }
      {
          wchar_t src[100];
          wmemset(src, L'C', 100-1); /* fill with L'C's */
          src[100-1] = L'\0'; /* null terminate */
          /* POTENTIAL FLAW: Possible buffer overflow if the sizeof(data)-strlen(data) is less than the length of src */
          wcsncat(data, src, 100);
          printWLine(data);
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B1() - use goodsource and badsink by changing the static_five==5 to static_five!=5 */
  static void goodG2B1()
  {
      wchar_t * data;
      wchar_t * data_badbuf = (wchar_t *)ALLOCA(50*sizeof(wchar_t));
      wchar_t * data_goodbuf = (wchar_t *)ALLOCA(100*sizeof(wchar_t));
      if(static_five!=5)
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          /* FLAW: Set a pointer to a "small" buffer. This buffer will be used in the sinks as a destination
           * buffer in various memory copying functions using a "large" source buffer. */
          data = data_badbuf;
          data[0] = L'\0'; /* null terminate */
      }
      else
      {
          /* FIX: Set a pointer to a "large" buffer, thus avoiding buffer overflows in the sinks. */
          data = data_goodbuf;
          data[0] = L'\0'; /* null terminate */
      }
      {
          wchar_t src[100];
          wmemset(src, L'C', 100-1); /* fill with L'C's */
          src[100-1] = L'\0'; /* null terminate */
          /* POTENTIAL FLAW: Possible buffer overflow if the sizeof(data)-strlen(data) is less than the length of src */
          wcsncat(data, src, 100);
          printWLine(data);
      }
  }
  
  /* goodG2B2() - use goodsource and badsink by reversing the blocks in the if statement */
  static void goodG2B2()
  {
      wchar_t * data;
      wchar_t * data_badbuf = (wchar_t *)ALLOCA(50*sizeof(wchar_t));
      wchar_t * data_goodbuf = (wchar_t *)ALLOCA(100*sizeof(wchar_t));
      if(static_five==5)
      {
          /* FIX: Set a pointer to a "large" buffer, thus avoiding buffer overflows in the sinks. */
          data = data_goodbuf;
          data[0] = L'\0'; /* null terminate */
      }
      else
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          /* FLAW: Set a pointer to a "small" buffer. This buffer will be used in the sinks as a destination
           * buffer in various memory copying functions using a "large" source buffer. */
          data = data_badbuf;
          data[0] = L'\0'; /* null terminate */
      }
      {
          wchar_t src[100];
          wmemset(src, L'C', 100-1); /* fill with L'C's */
          src[100-1] = L'\0'; /* null terminate */
          /* POTENTIAL FLAW: Possible buffer overflow if the sizeof(data)-strlen(data) is less than the length of src */
          wcsncat(data, src, 100);
          printWLine(data);
      }
  }
  
  void CWE121_Stack_Based_Buffer_Overflow__dest_wchar_t_alloca_ncat_07_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__dest_wchar_t_alloca_ncat_07_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE121_Stack_Based_Buffer_Overflow__dest_wchar_t_alloca_ncat_07_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  