additionalInput) additionalInput = nil continue } b = b[size:] } } var testingReader io.Reader // SetTestingReader sets a global, deterministic cryptographic randomness source // for testing purposes. Its Read method must never return an error, it must // never return short, and it must be safe for concurrent use. // // This is only intended to be used by the testing/cryptotest package. func SetTestingReader(r io.Reader) { testingReader = r } // DefaultReader is a sentinel type, embedded in the default...