php-christianriesen-otp

Description

Implements hotp according to RFC4226 and totp according to RFC6238 (only sha1 algorithm). Once you have a secret, you can use it directly in this class to create the passwords themselves (mainly for debugging use) or use the check functions to safely check the validity of the keys. The checkTotp function also includes a helper to battle timedrift.

Also includes a static GoogleAuthenticator function class to generate a correct url for the QR code, so you can easy scan it with your device. Google Authenticator is available as application for iPhone and Android. This removes the burden to create such an app from the developers of websites by using this set of classes.

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Homepage

https://github.com/ChristianRiesen/otp

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