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@eaccess/totp

v1.0.4

Published

TOTP generation and verification for @eaccess/auth

Vulnerabilities

Powered byPowered by Snyk
  • 0High
  • 0Medium
  • 0Low

Links

Maintainers

nvmsynvmsy

Keywords

totpotp2faauthentication

Readme

@eaccess/totp

TOTP generation and verification. Used internally by @eaccess/auth for two-factor authentication.

Usage

import Otp from "@eaccess/totp";

const secret = Otp.createSecret();
const code = Otp.generateTotp(secret);
const isValid = Otp.verifyTotp(secret, code);

QR Code URI

const uri = Otp.createTotpKeyUriForQrCode("MyApp", "[email protected]", secret);

Verification Window

The third argument controls drift tolerance in both directions (behind and ahead):

// 1 step of drift in each direction (default is 2)
Otp.verifyTotp(secret, code, 1);

// strict - no drift tolerance
Otp.verifyTotp(secret, code, 0);

// asymmetric - 2 steps behind, 0 ahead
Otp.verifyTotp(secret, code, 2, 0);