void BUF_MEM_free(BUF_MEM *a);
size_t BUF_MEM_grow(BUF_MEM *str, size_t len);
size_t BUF_MEM_grow_clean(BUF_MEM *str, size_t len);
-void BUF_reverse(unsigned char *out, unsigned char *in, size_t siz);
+void BUF_reverse(unsigned char *out, const unsigned char *in, size_t siz);
/* BEGIN ERROR CODES */
/*