HTML entities rendered literally in PDF signature stamp (UTF-8 encoding issue) – LibreSign 12.2.0

[yharroch]

Describe the bug

Accented characters in the signature stamp/footer are rendered incorrectly in the signed PDF. Instead of displaying proper UTF-8 characters, HTML entities appear literally in the final document.

To reproduce

1. Go to LibreSign settings.
2. Configure the signature stamp template with accented characters (e.g. “Signé numériquement…”).
3. Sign a document (email token or simple click).
4. Open the generated signed PDF.
5. Observe that HTML entities are rendered literally.

Expected behavior

Accented characters should be rendered correctly in UTF-8 format inside the signed PDF.

Screenshots

Example :
Expected : Signé numériquement par USER
Actual result in signed PDF: Signé numériquement par USER

Environment information

• LibreSign version: 12.2.0
• Nextcloud version: 32.0.6
• PHP version: 8.2
• OS: Debian Bookworm
• Embedded Java installed via occ libresign:install
• Server locale and PHP are correctly configured in UTF-8.

Additional context

The issue seems to originate from the Java/PDF rendering layer.
It may be related to entity escaping in the Twig template or PDF generation pipeline.
No encoding issues are observed in Nextcloud itself.

[vitormattos]

Hi @yharroch,

Thank you for your report, it really helped.

At first I couldn’t reproduce it and our automated multilingual tests were passing, but after deeper investigation I found the root cause in the Twig → PDF rendering layer. It required more than just adding a |raw: I wrote additional tests, validated multiple languages manually, and reviewed the related translations.

The fix is here:

• fix: html entities footer rendering #6966

It will be available in the next release.

I also noticed the French visible signature template is currently missing a {{ }} (mustache) around one variable. I’ve added a note for translators, but if you’d like to help improve the French translation, that would be very welcome. You can already submit corrections here: https://app.transifex.com/nextcloud/nextcloud/libresign.

Finally, LibreSign is maintained by a very small team. If the project is important for you or your company, please consider supporting it with a recurring contribution via GitHub Sponsors, or by introducing us to someone who could. Sustainable funding is what allows us to keep delivering fixes like this.

Thanks again for your help!