// GenerateKey generates a public and private key pair. func GenerateKey(c elliptic.Curve, rand io.Reader) (priv *PrivateKey, err error) { k, err := randFieldElement(c, rand) if err != nil { return } priv = new(PrivateKey) priv.PublicKey.Curve = c priv.D = k priv.PublicKey.X, priv.PublicKey.Y = c.ScalarBaseMult(k.Bytes()) return }