text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE121_Stack_Based_Buffer_Overflow__CWE805_struct_alloca_memcpy_44.c
  Label Definition File: CWE121_Stack_Based_Buffer_Overflow__CWE805.label.xml
  Template File: sources-sink-44.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
   * Sinks: memcpy
   *    BadSink : Copy twoIntsStruct array to data using memcpy
   * Flow Variant: 44 Data/control flow: data passed as an argument from one function to a function in the same source file called via a function pointer
   *
   * */
  
  #include "std_testcase.h"
  
  #ifndef OMITBAD
  
  static void badSink(twoIntsStruct * data)
  {
      {
          twoIntsStruct source[100];
          {
              size_t i;
              /* Initialize array */
              for (i = 0; i < 100; i++)
              {
                  source[i].intOne = 0;
                  source[i].intTwo = 0;
              }
          }
          /* POTENTIAL FLAW: Possible buffer overflow if data < 100 */
          memcpy(data, source, 100*sizeof(twoIntsStruct));
          printStructLine(&data[0]);
      }
  }
  
  void CWE121_Stack_Based_Buffer_Overflow__CWE805_struct_alloca_memcpy_44_bad()
  {
      twoIntsStruct * data;
      /* define a function pointer */
      void (*funcPtr) (twoIntsStruct *) = badSink;
      twoIntsStruct * dataBadBuffer = (twoIntsStruct *)ALLOCA(50*sizeof(twoIntsStruct));
      twoIntsStruct * dataGoodBuffer = (twoIntsStruct *)ALLOCA(100*sizeof(twoIntsStruct));
      /* 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 = dataBadBuffer;
      /* use the function pointer */
      funcPtr(data);
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B() uses the GoodSource with the BadSink */
  static void goodG2BSink(twoIntsStruct * data)
  {
      {
          twoIntsStruct source[100];
          {
              size_t i;
              /* Initialize array */
              for (i = 0; i < 100; i++)
              {
                  source[i].intOne = 0;
                  source[i].intTwo = 0;
              }
          }
          /* POTENTIAL FLAW: Possible buffer overflow if data < 100 */
          memcpy(data, source, 100*sizeof(twoIntsStruct));
          printStructLine(&data[0]);
      }
  }
  
  static void goodG2B()
  {
      twoIntsStruct * data;
      void (*funcPtr) (twoIntsStruct *) = goodG2BSink;
      twoIntsStruct * dataBadBuffer = (twoIntsStruct *)ALLOCA(50*sizeof(twoIntsStruct));
      twoIntsStruct * dataGoodBuffer = (twoIntsStruct *)ALLOCA(100*sizeof(twoIntsStruct));
      /* FIX: Set a pointer to a "large" buffer, thus avoiding buffer overflows in the sinks. */
      data = dataGoodBuffer;
      funcPtr(data);
  }
  
  void CWE121_Stack_Based_Buffer_Overflow__CWE805_struct_alloca_memcpy_44_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__CWE805_struct_alloca_memcpy_44_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE121_Stack_Based_Buffer_Overflow__CWE805_struct_alloca_memcpy_44_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  