oauth2-server/v5-security-improvements.md

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default	V5 Security Improvements	/v5-security-improvements/

V5 Security Improvements

As part of Mozilla's Secure Open Source programme this library underwent a security audit.

The findings of this library have been fixed in the following releases - 5.1.4 and 6.0.0

5.1.4

Version 5.1.4 is a backwards compatbile with other 5.1.x releases.

You will notice in your server logs a message like this:

You must set the encryption key going forward to improve the security of this library - see this page for more information https://oauth2.thephpleague.com/v5-security-improvements/

To supress this notice once you have instantiated an instance of \League\OAuth2\Server\AuthorizationServer you should call the setEncryptionKey() method passing in at least 32 bytes of random data.

You can generate this using base64_encode(random_bytes(32)). Alternatively if you're using a framework such as Laravel which has a encryption key already generated you can pass in that (in the case of Laravel use env('APP_KEY')).

For example:

// Setup the authorization server
$server = new AuthorizationServer(
    $clientRepository,
    $accessTokenRepository,
    $scopeRepository,
    $privateKeyPath,
    $publicKeyPath
);
$server->setEncryptionKey('lxZFUEsBCJ2Yb14IF2ygAHI5N4+ZAUXXaSeeJm6+twsUmIen');

6.0.0

Version 6.0.0 is not backwards compatible with version 5.1.x but only requires you to make one like of code change:

  $server = new AuthorizationServer(
      $clientRepository,
      $accessTokenRepository,
      $scopeRepository,
      $privateKeyPath,
+     'lxZFUEsBCJ2Yb14IF2ygAHI5N4+ZAUXXaSeeJm6+twsUmIen'
-      $publicKeyPath
  );

All you need to do is replace the public key that was being passed into the constructor of AuthorizationServer with a 32 bit encryption key.