Function cleandata

Libraries/unrar/secpassword.cpp:80–93

When we call memset in end of function to clean local variables for security reason, compiler optimizer can remove such call. So we use our own function for this purpose.

// for security reason, compiler optimizer can remove such call.
// So we use our own function for this purpose.
void cleandata(void *data,size_t size)
{
  if (data==NULL || size==0)
    return;
#if defined(_WIN_ALL) && defined(_MSC_VER)
  SecureZeroMemory(data,size);
#else
  // 'volatile' is required. Otherwise optimizers can remove this function
  // if cleaning local variables, which are not used after that.
  volatile byte *d = (volatile byte *)data;
  for (size_t i=0;i<size;i++)
    d[i]=0;
#endif
}


// We got a complain from user that it is possible to create WinRAR dump