This extension provides php bindings to the librnp OpenPGP library.
This extension requires librnp 0.18.1 or newer. Version 0.18.1 is the security baseline: it fixes CVE-2025-13470, a flaw that caused PKESK session keys to be generated without cryptographically random values.
PHP 8.2 or newer is supported (tested up to PHP 8.5).
Documentation for this extension is available in PHP Manual.