nonce

Documentation

Overview

Package nonce implements a simple ASCII nonce generator, as well as some randomization utilities.

Index

• func NewCryptoRandSource() mathrand.Source64
• func RandomBase64(r *rand.Rand, n int) string
• type Generator
  • func NewGenerator(src rand.Source) *Generator
  • func (g *Generator) NewBase64(stateLen int) string

Functions

func NewCryptoRandSource

func NewCryptoRandSource() mathrand.Source64

NewCryptoRandSource returns a rand.Source64 backed by the cryptographically-secure random number generator in crypto/rand. If crypto/rand is unavailable, NewCryptoRandSource panics.

The returned rand.Source64 does not support seeding, and the Seed method is a no-op.

func RandomBase64

func RandomBase64(r *rand.Rand, n int) string

RandomBase64 returns a string of length n, consisting of random characters drawn from the provided rand.Rand. The output string will solely consist of base64url characters; that is, all alphanumerics with - and _ added.

Types

type Generator

type Generator struct {
	// contains filtered or unexported fields
}

Generator creates randomly generated ASCII nonces. The set of possible characters in generated nonces is the same as RandomBase64. A Generator instance is safe for concurrent use.

func NewGenerator

func NewGenerator(src rand.Source) *Generator

NewGenerator creates a new Generator from the given rand.Source.

func (*Generator) NewBase64

func (g *Generator) NewBase64(stateLen int) string

NewBase64 creates a new nonce with the given length.