fix(qr): wifi/vcard injection protection, remove dead code

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Domains/QrCode/Actions/GenerateQrCode.php

@@ -18,8 +18,6 @@ class GenerateQrCode
         User $creator,
         ?int $linkId = null,
     ): QrCode {
-        $data = $this->renderer->buildPayload($type, $payload);
-
         return QrCode::create([
             'workspace_id' => $workspaceId,
             'link_id'      => $linkId,

app/Domains/QrCode/Models/QrCode.php

@@ -16,7 +16,6 @@ class QrCode extends Model
     protected $casts = [
         'payload' => 'array',
         'style'   => 'array',
-        'ulid'    => 'string',
     ];
 
     protected static function booted(): void

app/Domains/QrCode/Services/QrRenderer.php

@@ -35,14 +35,27 @@ class QrRenderer
         return match ($type) {
             'url'   => $data['url'],
             'text'  => $data['text'],
-            'wifi'  => "WIFI:T:{$data['encryption']};S:{$data['ssid']};P:{$data['password']};;",
+            'wifi'  => sprintf(
+                'WIFI:T:%s;S:%s;P:%s;;',
+                $this->escapeWifiField($data['encryption'] ?? ''),
+                $this->escapeWifiField($data['ssid'] ?? ''),
+                $this->escapeWifiField($data['password'] ?? ''),
+            ),
             'vcard' => $this->buildVcard($data),
             default => $data['url'] ?? '',
         };
     }
 
+    private function escapeWifiField(string $value): string
+    {
+        return str_replace(['\\', ';', ',', '"'], ['\\\\', '\\;', '\\,', '\\"'], $value);
+    }
+
     private function buildVcard(array $d): string
     {
-        return "BEGIN:VCARD\nVERSION:3.0\nFN:{$d['name']}\nEMAIL:{$d['email']}\nTEL:{$d['phone']}\nEND:VCARD";
+        $name  = str_replace(["\r", "\n"], '', $d['name'] ?? '');
+        $email = str_replace(["\r", "\n"], '', $d['email'] ?? '');
+        $phone = str_replace(["\r", "\n"], '', $d['phone'] ?? '');
+        return "BEGIN:VCARD\nVERSION:3.0\nFN:{$name}\nEMAIL:{$email}\nTEL:{$phone}\nEND:VCARD";
     }
 }

tests/Unit/QrCode/QrRendererTest.php

@@ -16,3 +16,29 @@ it('generates png as base64', function () {
 
     expect($png)->toStartWith('data:image/png;base64,');
 });
+
+it('builds url payload', function () {
+    $renderer = new QrRenderer;
+    expect($renderer->buildPayload('url', ['url' => 'https://example.com']))
+        ->toBe('https://example.com');
+});
+
+it('builds wifi payload', function () {
+    $renderer = new QrRenderer;
+    expect($renderer->buildPayload('wifi', [
+        'encryption' => 'WPA',
+        'ssid' => 'My Network',
+        'password' => 'pass;word',
+    ]))->toBe('WIFI:T:WPA;S:My Network;P:pass\\;word;;');
+});
+
+it('sanitizes vcard injection', function () {
+    $renderer = new QrRenderer;
+    $payload = $renderer->buildPayload('vcard', [
+        'name' => "Evil\nINJECTED:property",
+        'email' => 'x@example.com',
+        'phone' => '123',
+    ]);
+    // Newline stripped so "INJECTED:property" cannot appear as a separate vCard property line
+    expect($payload)->not->toContain("\nINJECTED");
+});