{ R, S []byte } // Sign signs a hash (which shall be the result of hashing a larger message with // the hash function H) using the private key, priv. If the hash is longer than // the bit-length of the private key's curve order, the hash will be truncated // to that length. func Sign[P Point[P], H fips140.Hash](c *Curve[P], h func() H, priv *PrivateKey, rand io.Reader, hash []byte) (*Signature, error) { if priv.pub.curve != c.curve { return nil, errors.New("ecdsa: private key does not match curve")...