text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE126_Buffer_Overread__wchar_t_alloca_memmove_02.c
  Label Definition File: CWE126_Buffer_Overread.stack.label.xml
  Template File: sources-sink-02.tmpl.c
  */
  /*
   * @description
   * CWE: 126 Buffer Over-read
   * BadSource:  Set data pointer to a small buffer
   * GoodSource: Set data pointer to a large buffer
   * Sink: memmove
   *    BadSink : Copy data to string using memmove
   * Flow Variant: 02 Control flow: if(1) and if(0)
   *
   * */
  
  #include "std_testcase.h"
  
  #include <wchar.h>
  
  #ifndef OMITBAD
  
  void CWE126_Buffer_Overread__wchar_t_alloca_memmove_02_bad()
  {
      wchar_t * data;
      wchar_t * dataBadBuffer = (wchar_t *)ALLOCA(50*sizeof(wchar_t));
      wchar_t * dataGoodBuffer = (wchar_t *)ALLOCA(100*sizeof(wchar_t));
      wmemset(dataBadBuffer, L'A', 50-1); /* fill with 'A's */
      dataBadBuffer[50-1] = L'\0'; /* null terminate */
      wmemset(dataGoodBuffer, L'A', 100-1); /* fill with 'A's */
      dataGoodBuffer[100-1] = L'\0'; /* null terminate */
      if(1)
      {
          /* FLAW: Set data pointer to a small buffer */
          data = dataBadBuffer;
      }
      {
          wchar_t dest[100];
          wmemset(dest, L'C', 100-1);
          dest[100-1] = L'\0'; /* null terminate */
          /* POTENTIAL FLAW: using memmove with the length of the dest where data
           * could be smaller than dest causing buffer overread */
          memmove(dest, data, wcslen(dest)*sizeof(wchar_t));
          dest[100-1] = L'\0';
          printWLine(dest);
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B1() - use goodsource and badsink by changing the 1 to 0 */
  static void goodG2B1()
  {
      wchar_t * data;
      wchar_t * dataBadBuffer = (wchar_t *)ALLOCA(50*sizeof(wchar_t));
      wchar_t * dataGoodBuffer = (wchar_t *)ALLOCA(100*sizeof(wchar_t));
      wmemset(dataBadBuffer, L'A', 50-1); /* fill with 'A's */
      dataBadBuffer[50-1] = L'\0'; /* null terminate */
      wmemset(dataGoodBuffer, L'A', 100-1); /* fill with 'A's */
      dataGoodBuffer[100-1] = L'\0'; /* null terminate */
      if(0)
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          printLine("Benign, fixed string");
      }
      else
      {
          /* FIX: Set data pointer to a large buffer */
          data = dataGoodBuffer;
      }
      {
          wchar_t dest[100];
          wmemset(dest, L'C', 100-1);
          dest[100-1] = L'\0'; /* null terminate */
          /* POTENTIAL FLAW: using memmove with the length of the dest where data
           * could be smaller than dest causing buffer overread */
          memmove(dest, data, wcslen(dest)*sizeof(wchar_t));
          dest[100-1] = L'\0';
          printWLine(dest);
      }
  }
  
  /* goodG2B2() - use goodsource and badsink by reversing the blocks in the if statement */
  static void goodG2B2()
  {
      wchar_t * data;
      wchar_t * dataBadBuffer = (wchar_t *)ALLOCA(50*sizeof(wchar_t));
      wchar_t * dataGoodBuffer = (wchar_t *)ALLOCA(100*sizeof(wchar_t));
      wmemset(dataBadBuffer, L'A', 50-1); /* fill with 'A's */
      dataBadBuffer[50-1] = L'\0'; /* null terminate */
      wmemset(dataGoodBuffer, L'A', 100-1); /* fill with 'A's */
      dataGoodBuffer[100-1] = L'\0'; /* null terminate */
      if(1)
      {
          /* FIX: Set data pointer to a large buffer */
          data = dataGoodBuffer;
      }
      {
          wchar_t dest[100];
          wmemset(dest, L'C', 100-1);
          dest[100-1] = L'\0'; /* null terminate */
          /* POTENTIAL FLAW: using memmove with the length of the dest where data
           * could be smaller than dest causing buffer overread */
          memmove(dest, data, wcslen(dest)*sizeof(wchar_t));
          dest[100-1] = L'\0';
          printWLine(dest);
      }
  }
  
  void CWE126_Buffer_Overread__wchar_t_alloca_memmove_02_good()
  {
      goodG2B1();
      goodG2B2();
  }
  
  #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()...");
      CWE126_Buffer_Overread__wchar_t_alloca_memmove_02_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE126_Buffer_Overread__wchar_t_alloca_memmove_02_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  