keyoxide-web/server/verifyHackerNews.php

<?php
// Copyright (C) 2020 Yarmo Mackenbach
// 
// This program is free software: you can redistribute it and/or modify it under
// the terms of the GNU Affero General Public License as published by the Free
// Software Foundation, either version 3 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 Affero General Public License for more
// details.
// 
// You should have received a copy of the GNU Affero General Public License along
// with this program. If not, see <https://www.gnu.org/licenses/>.
// 
// Also add information on how to contact you by electronic and paper mail.
// 
// If your software can interact with users remotely through a computer network,
// you should also make sure that it provides a way for users to get its source.
// For example, if your program is a web application, its interface could display
// a "Source" link that leads users to an archive of the code. There are many
// ways you could offer source, and different solutions will be better for different
// programs; see section 13 for the specific requirements.
// 
// You should also get your employer (if you work as a programmer) or school,
// if any, to sign a "copyright disclaimer" for the program, if necessary. For
// more information on this, and how to apply and follow the GNU AGPL, see <https://www.gnu.org/licenses/>.
?>
 <?php

$fingerprint = urlencode($_GET["fp"]);
$user = urlencode($_GET["user"]);

$url = "https://hacker-news.firebaseio.com/v0/user/$user.json";
$check = "\[Verifying my OpenPGP key: openpgp4fpr:$fingerprint\]";

$ch = curl_init();
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "GET");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_URL, $url);
$result = curl_exec($ch);
curl_close($ch);
$data = json_decode($result, true);

$response = array();
$response["verified"] = false;
$response["fingerprint"] = $fingerprint;
$response["user"] = $user;

if (preg_match("/{$check}/i", $data["about"])) {
    $response["verified"] = true;
}

echo json_encode($response);

?>