-void md5_nextBlock(md5_ctx_t *state, void* block);
-void md5_lastBlock(md5_ctx_t *state, void* block, uint16_t length);
+void md5_nextBlock(md5_ctx_t *state, const void* block);
+void md5_lastBlock(md5_ctx_t *state, const void* block, uint16_t length);
+void md5_ctx2hash(md5_hash_t* dest, const md5_ctx_t* state);
+void md5(md5_hash_t* dest, const void* msg, uint32_t length_b);