SetSecret regenerates config with new secret in the Lcobucci provider

CHANGELOG.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 You can find and compare releases at the GitHub release page.
 
 ## [Unreleased]
+- SetSecret regenerates config with new secret in the Lcobucci provider
 
 ### Added
 - Support for lcobucci/jwt^5.0 (and dropped support for ^4.0)

src/Providers/JWT/Lcobucci.php

@@ -74,7 +74,18 @@ public function __construct(
         $config = null
     ) {
         parent::__construct($secret, $algo, $keys);
+        $this->generateConfig($config);
+    }
 
+    /**
+     * Generate the config.
+     *
+     * @param Configuration $config optional, to pass an existing configuration to be used
+     *
+     * @return void
+     */
+    private function generateConfig($config = null)
+    {
         $this->signer = $this->getSigner();
 
         if (!is_null($config)) {
@@ -91,6 +102,21 @@ public function __construct(
         }
     }
 
+    /**
+     * Set the secret used to sign the token and regenerate the config using the secret.
+     *
+     * @param string $secret
+     *
+     * @return $this
+     */
+    public function setSecret($secret)
+    {
+        $this->secret = $secret;
+        $this->generateConfig();
+
+        return $this;
+    }
+
     /**
      * Gets the {@see $config} attribute.
      *

tests/Providers/JWT/LcobucciTest.php

@@ -189,6 +189,26 @@ public function testItShouldThrowAExceptionWhenTheAlgorithmPassedIsInvalid()
         $this->getProvider('secret', 'AlgorithmWrong')->decode('foo.bar.baz');
     }
 
+    public function testItShouldThrowAExceptionWhenTheSecretHasBeenUpdatedAndAnOldTokenIsUsed()
+    {
+        $orignal_secret = 'OF8SQY475aF8uiRuWunK9ZO6VdZDBemk';
+        $new_secret = 'vsd1z800ApIihL6HVNyhbGLRyBLD74sZ';
+
+        $payload = ['sub' => '1', 'exp' => $this->testNowTimestamp + 3600, 'iat' => $this->testNowTimestamp, 'iss' => '/foo'];
+
+        $provider = new Lcobucci($orignal_secret, 'HS256', []);
+        $token = $provider->encode($payload);
+
+        $this->assertSame($payload, $provider->decode($token));
+
+        $provider->setSecret($new_secret);
+
+        $this->expectException(TokenInvalidException::class);
+        $this->expectExceptionMessage('Token Signature could not be verified.');
+
+        $provider->decode($token);
+    }
+
     public function testItShouldReturnThePublicKey()
     {
         $provider = $this->getProvider(