text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE122_Heap_Based_Buffer_Overflow__c_CWE806_wchar_t_memmove_43.cpp
  Label Definition File: CWE122_Heap_Based_Buffer_Overflow__c_CWE806.label.xml
  Template File: sources-sink-43.tmpl.cpp
  */
  /*
   * @description
   * CWE: 122 Heap Based Buffer Overflow
   * BadSource:  Initialize data as a large string
   * GoodSource: Initialize data as a small string
   * Sinks: memmove
   *    BadSink : Copy data to string using memmove
   * Flow Variant: 43 Data flow: data flows using a C++ reference from one function to another in the same source file
   *
   * */
  
  #include "std_testcase.h"
  
  #include <wchar.h>
  
  namespace CWE122_Heap_Based_Buffer_Overflow__c_CWE806_wchar_t_memmove_43
  {
  
  #ifndef OMITBAD
  
  static void badSource(wchar_t * &data)
  {
      /* FLAW: Initialize data as a large buffer that is larger than the small buffer used in the sink */
      wmemset(data, L'A', 100-1); /* fill with L'A's */
      data[100-1] = L'\0'; /* null terminate */
  }
  
  void bad()
  {
      wchar_t * data;
      data = (wchar_t *)malloc(100*sizeof(wchar_t));
      if (data == NULL) {exit(-1);}
      badSource(data);
      {
          wchar_t dest[50] = L"";
          /* POTENTIAL FLAW: Possible buffer overflow if data is larger than dest */
          memmove(dest, data, wcslen(data)*sizeof(wchar_t));
          dest[50-1] = L'\0'; /* Ensure the destination buffer is null terminated */
          printWLine(data);
          free(data);
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B() uses the GoodSource with the BadSink */
  static void goodG2BSource(wchar_t * &data)
  {
      /* FIX: Initialize data as a small buffer that as small or smaller than the small buffer used in the sink */
      wmemset(data, L'A', 50-1); /* fill with L'A's */
      data[50-1] = L'\0'; /* null terminate */
  }
  
  static void goodG2B()
  {
      wchar_t * data;
      data = (wchar_t *)malloc(100*sizeof(wchar_t));
      if (data == NULL) {exit(-1);}
      goodG2BSource(data);
      {
          wchar_t dest[50] = L"";
          /* POTENTIAL FLAW: Possible buffer overflow if data is larger than dest */
          memmove(dest, data, wcslen(data)*sizeof(wchar_t));
          dest[50-1] = L'\0'; /* Ensure the destination buffer is null terminated */
          printWLine(data);
          free(data);
      }
  }
  
  void good()
  {
      goodG2B();
  }
  
  #endif /* OMITGOOD */
  
  } /* close namespace */
  
  /* 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
  
  using namespace CWE122_Heap_Based_Buffer_Overflow__c_CWE806_wchar_t_memmove_43; /* so that we can use good and bad easily */
  
  int main(int argc, char * argv[])
  {
      /* seed randomness */
      srand( (unsigned)time(NULL) );
  #ifndef OMITGOOD
      printLine("Calling good()...");
      good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  