does not change the underlying // state. It panics if any output has already been read. func (s *SHAKE) Sum(in []byte) []byte { return s.d.Sum(in) } // Write absorbs more data into the hash's state. // It panics if any output has already been read. func (s *SHAKE) Write(p []byte) (n int, err error) { return s.d.Write(p) } func (s *SHAKE) Read(out []byte) (n int, err error) { fips140.RecordApproved() // Note that read is not exposed on Digest since SHA-3 does not offer // variable output length. It...