Polynomials over GF(p)

• gf_poly_add — Adds polynomials over GF(p)
• gf_poly_divide — Division with remainder of polynomials over GF(p)
• gf_poly_multiply — Multiplies polynomials over GF(p)
• gf_poly_power — Raises a polynomial over GF(p) to an integer power
• gf_poly_subtract — Subtracts polynomials over GF(p)