First commit

.gitignore

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+cert.pem
+key.pem

LICENCE

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+BSD 2-Clause License
+
+Copyright (c) 2022, Magentix
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

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+# Leo
+
+Leo is the smallest Gemini server in the world.
+
+# Requirements
+
+- PHP >= 7.4
+- OpenSSL >= 1.1.1
+
+# Configuration
+
+Generate a self-signed certificate with **gemini** as passphrase:
+
+```bash
+openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365
+```
+
+Start the server:
+
+```bash
+php leo.php &
+```

capsule/index.gmi

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+# Welcome
+
+Hello world!

leo.php

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+<?php
+
+$root = __DIR__ . '/';
+
+$socket = stream_socket_server(
+    'tcp://127.0.0.1:1965',
+    $ec,
+    $em,
+    STREAM_SERVER_BIND|STREAM_SERVER_LISTEN,
+    stream_context_create(
+        [
+            'ssl' => [
+                'local_cert' => $root . 'cert.pem',
+                'local_pk' => $root . 'key.pem',
+                'passphrase' => 'gemini',
+                'allow_self_signed' => true,
+                'verify_peer' => false,
+            ]
+        ]
+    )
+);
+
+stream_socket_enable_crypto($socket, false);
+
+while (true) {
+    $fSocket = stream_socket_accept($socket, '-1', $remote);
+
+    stream_set_blocking($fSocket, true);
+    stream_socket_enable_crypto($fSocket, true, STREAM_CRYPTO_METHOD_TLSv1_3_SERVER);
+    $url = parse_url(trim(fread($fSocket, 1024)));
+    stream_set_blocking($fSocket, false);
+
+    $file = $root . 'capsule' . str_replace('../', '', ($url['path'] ?? '/index.gmi'));
+
+    fwrite($fSocket, is_file($file) ? "20 text/gemini\r\n" . file_get_contents($file) : "51 Not found\r\n");
+    fclose($fSocket);
+}