dst_hmacsha512_key_t
dst_hmacsha512_key_t *hmacsha512;
dst_hmacsha512_key_t *hkey = key->keydata.hmacsha512;
dst_hmacsha512_key_t *hkey = key->keydata.hmacsha512;
dst_hmacsha512_key_t *hkey;
dst_hmacsha512_key_t *hkey;
hkey = malloc(sizeof(dst_hmacsha512_key_t));