otp

Documentation

Overview

Package provides an implementation to generate one-time password values based on the TOTP (Time-Based One-Time Password) and HOTP (HMAC-Based One-Time Password) algorithms as defined into the RFC4226 and RFC6238 specifications

Index

• Constants
• func HOTP(h func() hash.Hash, key []byte, count uint64, digits int) (string, error)
• func TOTP(h func() hash.Hash, key []byte, t time.Time, interval int, digits int) (string, error)
• func TOTPFromBase32(h func() hash.Hash, decodedKey string, t time.Time, interval int, digits int) (string, error)

Constants

const (
	DefaultInterval = 30
	DefaultDigits   = 6
)

Functions

func HOTP

func HOTP(h func() hash.Hash, key []byte, count uint64, digits int) (string, error)

HOTP generates an HOTP (HMAC-Based One-Time Password) value as defined into the RFC4226 Note: if the hash function is nil, defaults to SHA1 Reference: https://datatracker.ietf.org/doc/html/rfc4226

func TOTP

func TOTP(h func() hash.Hash, key []byte, t time.Time, interval int, digits int) (string, error)

TOTP generates a TOTP (Time-Based One-Time Password) value as defined into the RFC6238 Note: if the hash function is nil, defaults to SHA1 Reference: https://datatracker.ietf.org/doc/html/rfc6238

func TOTPFromBase32

func TOTPFromBase32(h func() hash.Hash, decodedKey string, t time.Time, interval int, digits int) (string, error)

TOTPFromBase32 generates a TOTP (Time-Based One-Time Password) value as defined into the RFC6238 from a base32 encoded secret