= x mod l, where x is a 64-byte little-endian integer. // If x is not of the right length, SetUniformBytes returns nil and an error, // and the receiver is unchanged. // // SetUniformBytes can be used to set s to a uniformly distributed value given // 64 uniformly distributed random bytes. func (s *Scalar) SetUniformBytes(x []byte) (*Scalar, error) { if len(x) != 64 { return nil, errors.New("edwards25519: invalid SetUniformBytes input length") } // We have a value x of 512 bits, but our fiatScalarFromBytes...