text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE121_Stack_Based_Buffer_Overflow__wchar_t_type_overrun_memcpy_02.c
  Label Definition File: CWE121_Stack_Based_Buffer_Overflow.label.xml
  Template File: point-flaw-02.tmpl.c
  */
  /*
   * @description
   * CWE: 121 Stack Based Buffer Overflow
   * Sinks: type_overrun_memcpy
   *    GoodSink: Perform the memcpy() and prevent overwriting part of the structure
   *    BadSink : Overwrite part of the structure by incorrectly using the sizeof(struct) in memcpy()
   * Flow Variant: 02 Control flow: if(1) and if(0)
   *
   * */
  
  #include "std_testcase.h"
  
  #ifndef _WIN32
  #include <wchar.h>
  #endif
  
  /* SRC_STR is 32 wchar_t long, including the null terminator, for 64-bit architectures */
  #define SRC_STR L"0123456789abcdef0123456789abcde"
  
  typedef struct _charVoid
  {
      wchar_t charFirst[16];
      void * voidSecond;
      void * voidThird;
  } charVoid;
  
  #ifndef OMITBAD
  
  void CWE121_Stack_Based_Buffer_Overflow__wchar_t_type_overrun_memcpy_02_bad()
  {
      if(1)
      {
          {
              charVoid structCharVoid;
              structCharVoid.voidSecond = (void *)SRC_STR;
              /* Print the initial block pointed to by structCharVoid.voidSecond */
              printWLine((wchar_t *)structCharVoid.voidSecond);
              /* FLAW: Use the sizeof(structCharVoid) which will overwrite the pointer voidSecond */
              memcpy(structCharVoid.charFirst, SRC_STR, sizeof(structCharVoid));
              structCharVoid.charFirst[(sizeof(structCharVoid.charFirst)/sizeof(wchar_t))-1] = L'\0'; /* null terminate the string */
              printWLine((wchar_t *)structCharVoid.charFirst);
              printWLine((wchar_t *)structCharVoid.voidSecond);
          }
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* good1() uses if(0) instead of if(1) */
  static void good1()
  {
      if(0)
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          printLine("Benign, fixed string");
      }
      else
      {
          {
              charVoid structCharVoid;
              structCharVoid.voidSecond = (void *)SRC_STR;
              /* Print the initial block pointed to by structCharVoid.voidSecond */
              printWLine((wchar_t *)structCharVoid.voidSecond);
              /* FIX: Use sizeof(structCharVoid.charFirst) to avoid overwriting the pointer voidSecond */
              memcpy(structCharVoid.charFirst, SRC_STR, sizeof(structCharVoid.charFirst));
              structCharVoid.charFirst[(sizeof(structCharVoid.charFirst)/sizeof(wchar_t))-1] = L'\0'; /* null terminate the string */
              printWLine((wchar_t *)structCharVoid.charFirst);
              printWLine((wchar_t *)structCharVoid.voidSecond);
          }
      }
  }
  
  /* good2() reverses the bodies in the if statement */
  static void good2()
  {
      if(1)
      {
          {
              charVoid structCharVoid;
              structCharVoid.voidSecond = (void *)SRC_STR;
              /* Print the initial block pointed to by structCharVoid.voidSecond */
              printWLine((wchar_t *)structCharVoid.voidSecond);
              /* FIX: Use sizeof(structCharVoid.charFirst) to avoid overwriting the pointer voidSecond */
              memcpy(structCharVoid.charFirst, SRC_STR, sizeof(structCharVoid.charFirst));
              structCharVoid.charFirst[(sizeof(structCharVoid.charFirst)/sizeof(wchar_t))-1] = L'\0'; /* null terminate the string */
              printWLine((wchar_t *)structCharVoid.charFirst);
              printWLine((wchar_t *)structCharVoid.voidSecond);
          }
      }
  }
  
  void CWE121_Stack_Based_Buffer_Overflow__wchar_t_type_overrun_memcpy_02_good()
  {
      good1();
      good2();
  }
  
  #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__wchar_t_type_overrun_memcpy_02_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE121_Stack_Based_Buffer_Overflow__wchar_t_type_overrun_memcpy_02_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  