Let's burn!

[ㅁㄴㄻㄹ(lianne79)]

memcpy (dk, u, r);

/* Prevent possible leaks. */

burn (u, sizeof(u));

#ifdef _WIN32

#define burn(mem,size) do { volatile char *burnm = (volatile char *)(mem); int burnc = size; RtlSecureZeroMemory (mem, size); while (burnc--) *burnm++ = 0; } while (0)

#else

#define burn(mem,size) do { volatile char *burnm = (volatile char *)(mem); int burnc = size; while (burnc--) *burnm++ = 0; } while (0)

#endif