totp

README

TOTP (RFC-6238) and HOTP (RFC-4226)

Documentation

Index

• Variables
• func HOTP(counter uint64, key []byte) string
• func TOTP(t time.Time, key []byte) string

Examples

• TOTP

Variables

var (
	TimeStep time.Duration = 30 * time.Second
	TimeZero time.Time     = time.Unix(0, 0)
	Hash                   = sha512.New
	Digits                 = 10
)

Functions

func HOTP

func HOTP(counter uint64, key []byte) string

HOTP is HMAC-based One-Time Password RFC-4226

func TOTP

func TOTP(t time.Time, key []byte) string

TOTP is Time-based One-Time Password RFC-6238

Example

package main

import (
	"fmt"
	"time"

	"github.com/nikolaydubina/totp"
)

func main() {
	code := totp.TOTP(time.Date(2023, 10, 10, 11, 0, 0, 0, time.UTC), []byte("example-secret"))
	fmt.Println(code)
}

Output:

0031983894