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Example code of markocupic/contao-altcha-antispam

Informations about the package contao-altcha-antispam

Contao Altcha Antispam

This is a Contao CMS implementation of Altcha. The extension provides a front end form field for the Contao form generator.

ALTCHA uses a proof-of-work (POW) mechanism to protect your forms from spam and abuse. Unlike other solutions, ALTCHA is self-hosted, does not use cookies nor fingerprinting, does not track users, and is fully compliant with GDPR.

Visit https://altcha.org

Installation

You can install the package via composer:

Afterwards run the database migration task:

Configuration and usage

The extension runs out of the box and no further configuration is required. Nevertheless, some parameters can be configured.

The Complexity can be adjusted by modifying the minimum and maximum values of the randomly generated secret number on the server side (markocupic_contao_altcha_antispam.range_min and markocupic_contao_altcha_antispam.range_max). A lower maximum value creates a less complex challenge, requiring fewer computational iterations for the client to find a matching solution. Conversely, a higher maximum value increases the complexity, demanding more computational resources and time from the client.

Run composer install in your terminal to clear and rebuild cache if you made changes to the config.yaml file.

key default value info Required
algorithm SHA-256 Choose between SHA-256, SHA-512 or SHA-384 no
range_min 10000 Complexity: Choose a higher value to increase the complexity/duration. A minimum value of the random number of at least several thousand as a "minimum required complexity" is recomended. More no
range_max 100000 Complexity: Choose a higher value to increase the complexity/duration. The maximum value of 100,000 is a good start for most systems. More no
challenge_expiry 3600 Choose an expiration time, so that there is not an infinite amount of time to solve the challenge. no

Endpoint (route)

Out of the box, the extension will use the /_contao_altcha_challenge endpoint to get the challenges.

All versions of contao-altcha-antispam with dependencies

PHP Build Version
Package Version
Requires php Version ^8.1
contao/core-bundle Version ^4.13 || ^5.0
markocupic/contao-twig-assets Version ^1.0
symfony/config Version ^5.4 || ^6.4 || ^7.0
symfony/dependency-injection Version ^5.4 || ^6.4 || ^7.0
symfony/framework-bundle Version ^5.4 || ^6.4 || ^7.0
symfony/http-foundation Version ^5.4 || ^6.4 || ^7.0
symfony/http-kernel Version ^5.4 || ^6.4 || ^7.0
symfony/routing Version ^5.4 || ^6.4 || ^7.0
symfony/security-core Version ^5.4 || ^6.4 || ^7.0
symfony/translation-contracts Version ^1.0 || ^2.0 || ^3.0
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