https://github.com/thecodedrift/hotp-php

HMAC Based One Time Passwords in PHP. RFC4226 and RFC6238 compliant.
https://github.com/thecodedrift/hotp-php

hotp hotp-generator otp php totp

Last synced: 20 days ago
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HMAC Based One Time Passwords in PHP. RFC4226 and RFC6238 compliant.

• Host: GitHub
• URL: https://github.com/thecodedrift/hotp-php
• Owner: thecodedrift
• License: other
• Created: 2011-01-13T00:45:15.000Z (about 14 years ago)
• Default Branch: master
• Last Pushed: 2022-08-14T22:35:44.000Z (over 2 years ago)
• Last Synced: 2025-01-02T21:12:05.195Z (24 days ago)
• Topics: hotp, hotp-generator, otp, php, totp
• Language: PHP
• Homepage:
• Size: 39.1 KB
• Stars: 51
• Watchers: 4
• Forks: 9
• Open Issues: 0
• Metadata Files:
  • Readme: README.markdown
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

        
HOTP - PHP Based HMAC One Time Passwords

========================================

**What is HOTP**:

HOTP is a class that simplifies One Time Password systems for PHP Authentication. The HOTP/TOTP Algorithms have been around for a bit, so this is a straightforward class to meet the test vector requirements.

**What works with HOTP/TOTP**:

It's been tested to the test vectors, and I've verified the time-sync hashes against the following:

* Android: Mobile-OTP

* iPhone: OATH Token

**Why would I use this**:

Who wouldn't love a simple drop-in class for HMAC Based One Time Passwords? It's a great extra layer of security (creating two-factor auth) and it's pretty darn zippy.

**Okay you sold me. Give me some docs**:

```php

use jakobo\HOTP\HOTP;

// event based

$result = HOTP::generateByCounter( $key, $counter );

// time based within a "window" of time

$result = HOTP::generateByTime( $key, $window );

// same as generateByTime, but for $min windows before and $max windows after

$result = HOTP::generateByTimeWindow( $key, $window, $min, $max );

```

with `$result`, you can do all sorts of neat things...

```php

$result->toString();

$result->toHex();

$result->toDec();

// how many digits in your OTP?

$result->toHotp( $length );

```