Fediverse Public Key Directory PHP Client

This is an implementation of the client-side component of the Public Key Directory specification, written in PHP. See fedi-e2ee/pkd-server-go for the reference implementation of the server-side component written in Go.

Installation

composer require fedi-e2ee/pkd-client

Usage

<?php
use FediE2EE\PKD\ReadOnlyClient;
use FediE2EE\PKD\Crypto\PublicKey;

// Setup client
$directoryPublicKey = new PublicKey('public key goes here', 'ed25519');
$client = new ReadonlyClient('https://pkd.example.com', $directoryPublicKey);

// Grab public keys for ActivityPub actor
$publicKeys = $client->fetchPublicKeys('soatok@furry.engineer');
var_dump($publicKeys); // array<PublicKey>

// 'age' is an alias for the latest version; i.e., 'age-v1'.
$auxData = $client->fetchAuxData('soatok@furry.engineer', 'age');
var_dump($auxData); // array<AuxData>