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RobThree\TwoFactorAuth changelog

Version 3.x

Breaking changes

PHP Version

Version 3.x requires at least PHP 8.2.

Constructor signature change

In order to ensure users of this library make a conscious choice of QR Code Provider, the QR Code Provider is now a mandatory argument, in first place.

If you didn't provide one explicitly before, you can get the old behavior with:

use RobThree\Auth\TwoFactorAuth;
use RobThree\Auth\Providers\Qr\QRServerProvider;
$tfa = new TwoFactorAuth(new QRServerProvider());

If you provided one before, the order of the parameters have been changed, so simply move the QRCodeProvider argument to the first place or use named arguments.

Documentation on selecting a QR Code Provider is available here: QR Code Provider documentation.

Default secret length

The default secret length has been increased from 80 bits to 160 bits (RFC4226) PR #117. This might cause an issue in your application if you were previously storing secrets in a column with restricted size. This change doesn't impact existing secrets, only new ones will get longer.

Previously a secret was 16 characters, now it needs to be stored in a 32 characters width column.

You can keep the old behavior by setting 80 as argument to createSecret() (not recommended, see #117 for further discussion).

Other changes

  • The new PHP attribute SensitiveParameter was added to the code, to prevent accidental leak of secrets in stack traces.
  • Likely not breaking anything, but now all external QR Code providers use HTTPS with a verified certificate, see #126.
  • The CSPRNG is now exclusively using random_bytes() PHP function. Previously a fallback to openssl or non cryptographically secure PRNG existed, they have been removed (#122)
  • If an external QR code provider is used and the HTTP request results in an error, it will throw a QRException. Previously the error was ignored. PR #130 fix #129.

Version 2.x

Breaking changes

PHP Version

Version 2.x requires at least PHP 8.1.

Constructor signature

With version 2.x, the algorithm parameter of RobThree\Auth\TwoFactorAuth constructor is now an enum.

On version 1.x:

use RobThree\Auth\TwoFactorAuth;

$lib = new TwoFactorAuth('issuer-name', 6, 30, 'sha1');

On version 2.x, simple change the algorithm from a string to the correct enum:

use RobThree\Auth\TwoFactorAuth;
use RobThree\Auth\Algorithm;

$lib = new TwoFactorAuth('issuer-name', 6, 30, Algorithm::Sha1);

See the Algorithm.php file to see available algorithms.