Function unsafe_hacspec_examples::ntru_prime::ntru_prime::key_gen

pub fn key_gen(
    g: &Poly, 
    f: &Poly, 
    n_v: &Parameters
) -> Result<(Seq<i128>, (Seq<i128>, Seq<i128>)), &'static str>

Generate a key from given polynomials f and g. Generating the polynomials at random has to happen outside.