[FEATURE] Added NotUsernameValidator

Signed-off-by: Torben Hansen <derhansen@gmail.com>

Classes/PasswordPolicy/Validator/NotUsernameValidator.php

@@ -0,0 +1,62 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the Extension "add_pwd_policy" for TYPO3 CMS.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ */
+
+namespace Derhansen\AddPwdPolicy\PasswordPolicy\Validator;
+
+use TYPO3\CMS\Core\PasswordPolicy\Validator\AbstractPasswordValidator;
+use TYPO3\CMS\Core\PasswordPolicy\Validator\Dto\ContextData;
+
+class NotUsernameValidator extends AbstractPasswordValidator
+{
+    private const IDENTIFIER = 'notUsername';
+
+    public function validate(string $password, ?ContextData $contextData = null): bool
+    {
+        $lang = $this->getLanguageService();
+
+        if (!$contextData) {
+            return true;
+        }
+
+        $usernameValues = [];
+        if ($contextData->getNewUsername() !== '') {
+            $usernameValues[] = strtolower($contextData->getNewUsername());
+        }
+
+        if ($contextData->getData('currentUsername') !== '') {
+            $usernameValues[] = strtolower($contextData->getData('currentUsername'));
+        }
+
+        $isValid = true;
+
+        foreach ($usernameValues as $usernameValue) {
+            if (str_contains(strtolower($password), $usernameValue)) {
+                $this->addErrorMessage(
+                    self::IDENTIFIER,
+                    $lang->sL('LLL:EXT:add_pwd_policy/Resources/Private/Language/locallang.xlf:error.notUsername')
+                );
+
+                $isValid = false;
+                break;
+            }
+        }
+
+        return $isValid;
+    }
+
+    public function initializeRequirements(): void
+    {
+        $this->addRequirement(
+            self::IDENTIFIER,
+            $this->getLanguageService()->sL('LLL:EXT:add_pwd_policy/Resources/Private/Language/locallang.xlf:requirement.notUsername')
+        );
+    }
+}

Resources/Private/Language/locallang.xlf

@@ -9,6 +9,12 @@
 			<trans-unit id="error.pwnedPassword" resname="error.pwnedPassword">
 				<source>This password appeared in a data breach and is found %d times in the haveibeenpwned.com database. Please choose a different password.</source>
 			</trans-unit>
+			<trans-unit id="requirement.notUsername" resname="requirement.notUsername">
+				<source>Must not contain the username</source>
+			</trans-unit>
+			<trans-unit id="error.notUsername" resname="error.notUsername">
+				<source>The username must not be used in the password.</source>
+			</trans-unit>
 		</body>
 	</file>
 </xliff>