SilcBool silc_dh_compute_public(SilcDH dh, const SilcMPInt **y);

    Computes the public key y = g ^ x mod p, and returns it to the `y'
    pointer sent as argument, unless the `y' is NULL. Returns FALSE if
    the computation could not be performed. The returned `y' must not be
    freed by the caller.