TYPO3 Extension ls_security_headers

This extension offers configurable security headers for the frontend.

Setup

1. Install the extension by using composer
2. Create a "Security Headers" record on the root page and configure the desired headers
3. Validate your configuration with securityheaders.com

Infos

• Security Headers that are defined in the .htaccess or in some other server configuration will not be overwritten.
• If EXT:staticfilecache is used, you have to extend the validHtaccessHeaders extension setting.
• Security Headers for the TYPO3 Backend can be defined in AdditionalConfiguration.php with the BE setting "HTTP".

Nonce support

This extension includes a TypoScript helper function for generating CSP nonces.
All the nonces generated by the function during the request will automatically be added to the Content-Security-Policy header at the end of the request.
Basic usage:

<style nonce="{f:cObject(typoscriptObjectPath: 'lib.cspNonce', data: {length: '32', policy: 'style'})}">

The policy argument defines the policy the nonce should be added to (style for style-src, script for script-src, ...).
The length argument defines the length of the nonce in bytes.

Ressources

LIMESODA Website Security