feat: Implement SystemRoleProtection validator to prevent modification of system roles

SECURITY.md

@@ -0,0 +1,95 @@
+# Security Recommendations for myCRM
+
+## Implemented Security Measures
+
+### 1. Authentication & Authorization
+- ✅ Session-based authentication (stateless: false)
+- ✅ Role-based access control (RBAC)
+- ✅ API endpoints protected with `is_granted()` checks
+- ✅ User can only edit own profile or requires ROLE_ADMIN
+- ✅ System roles protected via SystemRoleProtection validator
+
+### 2. Password Security
+- ✅ Passwords hashed via Symfony PasswordHasher
+- ✅ Plain passwords erased after hashing
+- ✅ No passwords in serialization groups
+
+### 3. XSS Prevention
+- ✅ Vue.js automatic escaping
+- ✅ No v-html or innerHTML usage
+- ✅ All user input properly escaped
+
+### 4. CSRF Protection
+- ✅ Session-based API (SameSite cookies)
+- ✅ credentials: 'same-origin' in fetch calls
+
+## Recommended Additional Measures
+
+### 1. Rate Limiting
+Consider implementing rate limiting for API endpoints:
+```bash
+composer require symfony/rate-limiter
+```
+
+Configuration example in `config/packages/rate_limiter.yaml`:
+```yaml
+framework:
+    rate_limiter:
+        api_login:
+            policy: 'sliding_window'
+            limit: 5
+            interval: '1 minute'
+        api_general:
+            policy: 'fixed_window'
+            limit: 100
+            interval: '1 hour'
+```
+
+### 2. HTTPS Only (Production)
+Ensure HTTPS is enforced in production:
+```yaml
+# config/packages/framework.yaml (when@prod)
+framework:
+    session:
+        cookie_secure: true
+        cookie_samesite: 'strict'
+```
+
+### 3. Content Security Policy
+Add CSP headers via `nelmio/security-bundle`:
+```bash
+composer require nelmio/security-bundle
+```
+
+### 4. Input Validation
+- ✅ Email validation (Symfony built-in)
+- ✅ Required field validation
+- Consider adding: max length validation, sanitization
+
+### 5. Audit Logging
+Consider logging sensitive operations:
+- User creation/deletion
+- Role assignment changes
+- Permission modifications
+
+### 6. Database Security
+- ✅ Prepared statements via Doctrine (SQL injection protected)
+- ✅ Unique constraints on email/role+module combinations
+- Consider: Database encryption for sensitive fields
+
+### 7. Error Handling
+Current: Errors exposed in dev mode
+Production: Ensure debug mode is disabled and errors are logged securely
+
+## Security Checklist for Deployment
+
+- [ ] Set `APP_ENV=prod` and `APP_DEBUG=0`
+- [ ] Enable HTTPS with valid SSL certificate
+- [ ] Set secure session cookie settings
+- [ ] Implement rate limiting
+- [ ] Set up security headers (CSP, X-Frame-Options, etc.)
+- [ ] Regular dependency updates (`composer update`)
+- [ ] Database backups configured
+- [ ] Error logging to secure location
+- [ ] Monitor authentication failures
+- [ ] Review and rotate secrets in `.env`

src/Entity/Role.php

@@ -9,6 +9,7 @@ use ApiPlatform\Metadata\Post;
 use ApiPlatform\Metadata\Put;
 use ApiPlatform\Metadata\Delete;
 use App\Repository\RoleRepository;
+use App\Validator\SystemRoleProtection;
 use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
@@ -16,6 +17,7 @@ use Symfony\Component\Serializer\Annotation\Groups;
 
 #[ORM\Entity(repositoryClass: RoleRepository::class)]
 #[ORM\Table(name: 'roles')]
+#[SystemRoleProtection(groups: ['role:write'])]
 #[ApiResource(
     operations: [
         new GetCollection(stateless: false),

src/Validator/SystemRoleProtection.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App\Validator;
+
+use Symfony\Component\Validator\Constraint;
+
+#[\Attribute]
+class SystemRoleProtection extends Constraint
+{
+    public string $message = 'System-Rollen können nicht bearbeitet oder gelöscht werden.';
+
+    public function getTargets(): string
+    {
+        return self::CLASS_CONSTRAINT;
+    }
+}

src/Validator/SystemRoleProtectionValidator.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Validator;
+
+use App\Entity\Role;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+use Symfony\Component\Validator\Exception\UnexpectedValueException;
+
+class SystemRoleProtectionValidator extends ConstraintValidator
+{
+    public function validate(mixed $value, Constraint $constraint): void
+    {
+        if (!$constraint instanceof SystemRoleProtection) {
+            throw new UnexpectedTypeException($constraint, SystemRoleProtection::class);
+        }
+
+        if (!$value instanceof Role) {
+            throw new UnexpectedValueException($value, Role::class);
+        }
+
+        // Check if this is an existing system role being modified
+        if ($value->getId() !== null && $value->isSystem()) {
+            $this->context->buildViolation($constraint->message)
+                ->addViolation();
+        }
+    }
+}