void *hmacmd5_make_context(void);
void hmacmd5_free_context(void *handle);
-void hmacmd5_key(void *handle, unsigned char const *key, int len);
+void hmacmd5_key(void *handle, void const *key, int len);
void hmacmd5_do_hmac(void *handle, unsigned char const *blk, int len,
unsigned char *hmac);