typedef void(*hf_lastBlock_fpt)(void*, const void*, uint16_t);
typedef void(*hf_ctx2hash_fpt)(void*, void*);
typedef void(*hf_free_fpt)(void*);
-typedef void(*hf_mem_fpt)(void*, void*, uint32_t);
+typedef void(*hf_mem_fpt)(void*, const void*, uint32_t);
#define HFDESC_TYPE_HASHFUNCTION 0x02