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Package randutil

import "crypto/internal/randutil"

Overview ▾

Package randutil contains internal randomness utilities for various crypto packages.

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).