shift+1) }) } } func natBytes(n *Nat) []byte { return n.Bytes(maxModulus(uint(len(n.limbs)))) } func natFromBytes(b []byte) *Nat { // Must not use Nat.SetBytes as it's used in TestSetBytes. bb := new(big.Int).SetBytes(b) return NewNat().setBig(bb) } func modulusFromBytes(b []byte) *Modulus { bb := new(big.Int).SetBytes(b) m, _ := NewModulus(bb.Bytes()) return m } // maxModulus returns the biggest modulus that can fit in n limbs. func maxModulus(n uint) *Modulus { b := big.NewInt(1) b.Lsh(b, n*_W) b.Sub(b,...