text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE122_Heap_Based_Buffer_Overflow__cpp_CWE806_char_snprintf_17.cpp
  Label Definition File: CWE122_Heap_Based_Buffer_Overflow__cpp_CWE806.label.xml
  Template File: sources-sink-17.tmpl.cpp
  */
  /*
   * @description
   * CWE: 122 Heap Based Buffer Overflow
   * BadSource:  Initialize data as a large string
   * GoodSource: Initialize data as a small string
   * Sink: snprintf
   *    BadSink : Copy data to string using snprintf
   * Flow Variant: 17 Control flow: for loops
   *
   * */
  
  #include "std_testcase.h"
  
  #include <wchar.h>
  
  #ifdef _WIN32
  #define SNPRINTF _snprintf
  #else
  #define SNPRINTF snprintf
  #endif
  
  namespace CWE122_Heap_Based_Buffer_Overflow__cpp_CWE806_char_snprintf_17
  {
  
  #ifndef OMITBAD
  
  void bad()
  {
      int i;
      char * data;
      data = new char[100];
      for(i = 0; i < 1; i++)
      {
          /* FLAW: Initialize data as a large buffer that is larger than the small buffer used in the sink */
          memset(data, 'A', 100-1); /* fill with 'A's */
          data[100-1] = '\0'; /* null terminate */
      }
      {
          char dest[50] = "";
          /* POTENTIAL FLAW: Possible buffer overflow if data is larger than dest */
          SNPRINTF(dest, strlen(data), "%s", data);
          printLine(data);
          delete [] data;
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B() - use goodsource in the for statement */
  static void goodG2B()
  {
      int h;
      char * data;
      data = new char[100];
      for(h = 0; h < 1; h++)
      {
          /* FIX: Initialize data as a small buffer that as small or smaller than the small buffer used in the sink */
          memset(data, 'A', 50-1); /* fill with 'A's */
          data[50-1] = '\0'; /* null terminate */
      }
      {
          char dest[50] = "";
          /* POTENTIAL FLAW: Possible buffer overflow if data is larger than dest */
          SNPRINTF(dest, strlen(data), "%s", data);
          printLine(data);
          delete [] 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__cpp_CWE806_char_snprintf_17; /* 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
  