randutil

Documentation

Overview

Package randutil contains internal randomness utilities for various crypto packages.

Index

• func MaybeReadByte(r io.Reader)
• func MixedCSPRNG(rand io.Reader, D []byte, hash []byte) (io.Reader, error)

Functions

func MaybeReadByte

func MaybeReadByte(r io.Reader)

MaybeReadByte reads a single byte from r with ~50% probability. This is used to ensure that callers do not depend on non-guaranteed behaviour, e.g. assuming that rsa.GenerateKey is deterministic w.r.t. a given random stream.

This does not affect tests that pass a stream of fixed bytes as the random source (e.g. a zeroReader).

func MixedCSPRNG

func MixedCSPRNG(rand io.Reader, D []byte, hash []byte) (io.Reader, error)