randutil

Documentation

Index

• func Int64n(n uint) int64
• func Intn(n uint) int
• func NewSeedInt64Crypto() (int64, error)
• func NewSeedInt64Time() int64
• func RandString(alphabet string, length uint) string
• type CryptoRandSource
  • func NewCryptoRandSource() CryptoRandSource
  • func (CryptoRandSource) Int63() int64
  • func (CryptoRandSource) Seed(int64)

Functions

func Int64n

func Int64n(n uint) int64

func Intn

func Intn(n uint) int

Intn returns a random number backed by `crypto/rand`.

func NewSeedInt64Crypto

func NewSeedInt64Crypto() (int64, error)

NewSeedInt64Crypto creates an `int64` seed value for `math/rand`. This is preferred over `NewSeedInt64Time()`. See: https://stackoverflow.com/a/54491783/1908967

func NewSeedInt64Time

func NewSeedInt64Time() int64

NewSeedInt64Time creates an `int64` seed value for `math/rand` based on `time.Now()`. This can have reduced entropy if used constantly throughout with shourl time differentials. See: https://stackoverflow.com/a/12321192/1908967

func RandString

func RandString(alphabet string, length uint) string

RandString returns a random string of length `length` using the supplied alphabet. If no alphabet is provided, `AlphabetBase16`, aha hexadecimal is used.

Types

type CryptoRandSource

type CryptoRandSource struct{}

CryptoRandSource is a `crypto/rand` backed source that satisfies the `math/rand.Source` interface definition. It can be used as `r := rand.New(NewCryptoRandSource())` See: https://stackoverflow.com/a/35208651/1908967

func NewCryptoRandSource

func NewCryptoRandSource() CryptoRandSource

func (CryptoRandSource) Int63

func (CryptoRandSource) Int63() int64

func (CryptoRandSource) Seed

func (CryptoRandSource) Seed(int64)