ssh_hmac_final
ssh_hmac_final(ctx, digest, sizeof(digest)) < 0)
int ssh_hmac_final(struct ssh_hmac_ctx *ctx, u_char *d, size_t dlen)
ssh_hmac_final(ctx, result, sizeof(result)))
ssh_hmac_final(mac->hmac_ctx, u.m, sizeof(u.m)) < 0)