blake2s_final
blake2s_final(&ctx, digest);
blake2s_final(&ctx, d);
void blake2s_final(struct blake2s *, void *);
blake2s_final(&B, &h);
blake2s_final(&state, hash);
blake2s_final(&state, hash);
blake2s_final(&state, out);
blake2s_final(&state, key);
blake2s_final(&state, out);
blake2s_final(&state, out);
blake2s_final(&state, out);
blake2s_final(&state, out);