dchest/uniuri

Go package uniuri generates random strings good for use in URIs to identify unique objects.

Package uniuri

import "github.com/dchest/uniuri"

Package uniuri generates random strings good for use in URIs to identify unique objects.

Example usage:

s := uniuri.New() // s is now "apHCJBl7L1OmC57n"

A standard string created by New() is 16 bytes in length and consists of Latin upper and lowercase letters, and numbers (from the set of 62 allowed characters), which means that it has ~95 bits of entropy. To get more entropy, you can use NewLen(UUIDLen), which returns 20-byte string, giving ~119 bits of entropy, or any other desired length.

Functions read from crypto/rand random source, and panic if they fail to read from it.

Constants

const (
	// StdLen is a standard length of uniuri string to achive ~95 bits of entropy.
	StdLen = 16
	// UUIDLen is a length of uniuri string to achive ~119 bits of entropy, closest
	// to what can be losslessly converted to UUIDv4 (122 bits).
	UUIDLen = 20
)

Variables

var StdChars = []byte("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789")

StdChars is a set of standard characters allowed in uniuri string.

Functions

func New

func New() string

New returns a new random string of the standard length, consisting of standard characters.

func NewLen

func NewLen(length int) string

NewLen returns a new random string of the provided length, consisting of standard characters.

func NewLenChars

func NewLenChars(length int, chars []byte) string

NewLenChars returns a new random string of the provided length, consisting of the provided byte slice of allowed characters (maximum 256).

Public domain dedication

Written in 2011-2014 by Dmitry Chestnykh

The author(s) have dedicated all copyright and related and neighboring rights to this software to the public domain worldwide. Distributed without any warranty. http://creativecommons.org/publicdomain/zero/1.0/