text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE122_Heap_Based_Buffer_Overflow__char_type_overrun_memcpy_03.c
  Label Definition File: CWE122_Heap_Based_Buffer_Overflow.label.xml
  Template File: point-flaw-03.tmpl.c
  */
  /*
   * @description
   * CWE: 122 Heap 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: 03 Control flow: if(5==5) and if(5!=5)
   *
   * */
  
  #include "std_testcase.h"
  
  #ifndef _WIN32
  #include <wchar.h>
  #endif
  
  #define SRC_STR "0123456789abcde0123"
  
  typedef struct _charVoid
  {
      char charFirst[16];
      void * voidSecond;
      void * voidThird;
  } charVoid;
  
  #ifndef OMITBAD
  
  void CWE122_Heap_Based_Buffer_Overflow__char_type_overrun_memcpy_03_bad()
  {
      if(5==5)
      {
          {
              charVoid * structCharVoid = (charVoid *)malloc(sizeof(charVoid));
              structCharVoid->voidSecond = (void *)SRC_STR;
              /* Print the initial block pointed to by structCharVoid->voidSecond */
              printLine((char *)structCharVoid->voidSecond);
              /* FLAW: Use the sizeof(*structCharVoid) which will overwrite the pointer y */
              memcpy(structCharVoid->charFirst, SRC_STR, sizeof(*structCharVoid));
              structCharVoid->charFirst[(sizeof(structCharVoid->charFirst)/sizeof(char))-1] = '\0'; /* null terminate the string */
              printLine((char *)structCharVoid->charFirst);
              printLine((char *)structCharVoid->voidSecond);
              free(structCharVoid);
          }
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* good1() uses if(5!=5) instead of if(5==5) */
  static void good1()
  {
      if(5!=5)
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          printLine("Benign, fixed string");
      }
      else
      {
          {
              charVoid * structCharVoid = (charVoid *)malloc(sizeof(charVoid));
              structCharVoid->voidSecond = (void *)SRC_STR;
              /* Print the initial block pointed to by structCharVoid->voidSecond */
              printLine((char *)structCharVoid->voidSecond);
              /* FIX: Use the sizeof(structCharVoid->charFirst) to avoid overwriting the pointer y */
              memcpy(structCharVoid->charFirst, SRC_STR, sizeof(structCharVoid->charFirst));
              structCharVoid->charFirst[(sizeof(structCharVoid->charFirst)/sizeof(char))-1] = '\0'; /* null terminate the string */
              printLine((char *)structCharVoid->charFirst);
              printLine((char *)structCharVoid->voidSecond);
              free(structCharVoid);
          }
      }
  }
  
  /* good2() reverses the bodies in the if statement */
  static void good2()
  {
      if(5==5)
      {
          {
              charVoid * structCharVoid = (charVoid *)malloc(sizeof(charVoid));
              structCharVoid->voidSecond = (void *)SRC_STR;
              /* Print the initial block pointed to by structCharVoid->voidSecond */
              printLine((char *)structCharVoid->voidSecond);
              /* FIX: Use the sizeof(structCharVoid->charFirst) to avoid overwriting the pointer y */
              memcpy(structCharVoid->charFirst, SRC_STR, sizeof(structCharVoid->charFirst));
              structCharVoid->charFirst[(sizeof(structCharVoid->charFirst)/sizeof(char))-1] = '\0'; /* null terminate the string */
              printLine((char *)structCharVoid->charFirst);
              printLine((char *)structCharVoid->voidSecond);
              free(structCharVoid);
          }
      }
  }
  
  void CWE122_Heap_Based_Buffer_Overflow__char_type_overrun_memcpy_03_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()...");
      CWE122_Heap_Based_Buffer_Overflow__char_type_overrun_memcpy_03_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE122_Heap_Based_Buffer_Overflow__char_type_overrun_memcpy_03_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  