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3833e8e2cb
In the process, replace out-of-module imports with their FIPS versions. For #69536 Change-Id: I83e900b7c38ecf760382e5dca7fd0b1eaa5a5589 Reviewed-on: https://go-review.googlesource.com/c/go/+/626879 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Russ Cox <rsc@golang.org> Auto-Submit: Filippo Valsorda <filippo@golang.org> Reviewed-by: Daniel McCarney <daniel@binaryparadox.net> Reviewed-by: Michael Knyszek <mknyszek@google.com>
26 lines
755 B
Go
26 lines
755 B
Go
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package randutil contains internal randomness utilities for various
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// crypto packages.
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package randutil
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import (
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"io"
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"math/rand/v2"
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)
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// MaybeReadByte reads a single byte from r with 50% probability. This is used
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// to ensure that callers do not depend on non-guaranteed behaviour, e.g.
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// assuming that rsa.GenerateKey is deterministic w.r.t. a given random stream.
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//
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// This does not affect tests that pass a stream of fixed bytes as the random
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// source (e.g. a zeroReader).
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func MaybeReadByte(r io.Reader) {
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if rand.Uint64()&1 == 1 {
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return
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}
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var buf [1]byte
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r.Read(buf[:])
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} |