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Informations about the package typo3-altcha

TYPO3 Extension ALTCHA

This TYPO3 extension integrates ALTCHA Widget v3 into TYPO3 ext:form. It uses ALTCHA's proof-of-work approach to protect forms against spam and abuse without visual puzzles or tracking-based captcha techniques.

Beta Status

This release line is currently beta.

Features

Installation

Install this TYPO3 extension using Composer:

Choose one integration method and update the database schema via the install tool:

This TYPO3 extension is licensed under the GNU General Public License Version 2 (GPLv2).

Configuration

TypoScript Integration: Site Set or Static Template

This extension supports both TYPO3 integration approaches:

Do not load both at the same time. Use one method per site.

Supported TYPO3 Versions

Extension Configuration

HMAC Secret Key (basic.hmac [string])
HMAC secret key for challenge generation. If not defined, TYPO3's encryption key will be used.

TypoScript Configuration Settings

The following TypoScript settings are available:

Form Caching and Challenge Generation

Important: This extension automatically uses an uncached endpoint (/?type=1768669000) for local challenge generation to prevent form caching issues. This avoids reused challenges in cached forms and keeps ALTCHA Widget v3 compatible with TYPO3 page caching.

No additional configuration is required – the extension handles this automatically.

Self-hosted ALTCHA Server

You can use a self-hosted Altcha server instead of local challenge generation. Configure the following TypoScript settings:

Using the Proxy Endpoints (Recommended)

When both challengeUrl and apiKey are configured, the extension automatically uses built-in proxy endpoints that:

Direct URL Mode (Optional)

If you set only challengeUrl without apiKey, the widget will connect directly to your server. This is suitable for same-origin servers using session cookies or public endpoints.

Local Mode (Default)

If neither challengeUrl nor verifyUrl are set, the extension uses:

Widget v3 Notes

Customizing ALTCHA Texts

1. Create Your Own Partial

Create a new file at the following location in your extension or site package:

Replace my_extension with the key of your sitepackage or custom extension.

2. Add YAML Configuration to Register Partial Path

To let TYPO3 know about your new partial path, extend the YAML configuration of the Form Framework. In your sitepackage, add the following file:

Configuration/Form/Overrides/form_editor.yaml

Your YAML file must be included in TypoScript with a key higher than the one used by this extension (e.g. > 125) to ensure it overrides the default path.

In your TypoScript setup:

This ensures that your own YAML is loaded after the one provided by Altcha.

Available Translation Keys

You can define any of the following keys inside your AltchaTranslations.html:

Example with Static Texts

EXT:my_extension/Resources/Private/Frontend/Partials/AltchaTranslations.html:

Example with TYPO3 Localization

If you want to use TYPO3’s localization, add the relevant labels to your locallang.xlf.

Partial Example:

License

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

All versions of typo3-altcha with dependencies

PHP Build Version
Package Version
Requires typo3/cms-backend Version ^13.4 || ^14.0
typo3/cms-core Version ^13.4 || ^14.0
typo3/cms-extbase Version ^13.4 || ^14.0
typo3/cms-form Version ^13.4 || ^14.0
typo3/cms-fluid Version ^13.4 || ^14.0
altcha-org/altcha Version ^2.0
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