From edf137a7d0a15f5b63f50392aad9927f043bf53c Mon Sep 17 00:00:00 2001
From: Adam Spragg <adam@spra.gg>
Date: Mon, 4 Oct 2021 09:40:04 +0100
Subject: First working version of emailautoconf

---
 php/thunderbird.php | 91 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 php/thunderbird.php

(limited to 'php/thunderbird.php')

diff --git a/php/thunderbird.php b/php/thunderbird.php
new file mode 100644
index 0000000..cc35f09
--- /dev/null
+++ b/php/thunderbird.php
@@ -0,0 +1,91 @@
+<?php
+// Copyright © 2021 Adam Spragg
+//
+// This file is part of emailautoconf
+//
+// emailautoconf is free software: you can redistribute it and/or modify
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// emailautoconf 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
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with emailautoconf.  If not, see
+// <https://www.gnu.org/licenses/>.
+//
+// SPDX-License-Identifier: LGPL-3.0-or-later
+
+// Thunderbird autoconfiguration described at:
+// https://wiki.mozilla.org/Thunderbird:Autoconfiguration
+// https://wiki.mozilla.org/Thunderbird:Autoconfiguration:ConfigFileFormat
+//
+// Should be installed at:
+//	http://autoconfig.[domain]/mail/config-v1.1.xml
+//	http://[domain]/.well-known/autoconfig/mail/config-v1.1.xml
+
+if ($_SERVER['REQUEST_URI'] == "/mail/config-v1.1.xml"
+		&& preg_match('/^autoconfig\.(.*)$/', $_SERVER['HTTP_HOST'], $matches))
+{
+	$domain = $matches[1];
+}
+else if ($_SERVER['REQUEST_URI'] == "/.well-known/autoconfig/mail/config-v1.1.xml") {
+	$domain = $_SERVER['HTTP_HOST'];
+}
+else {
+	http_response_code(500);
+	header('Content-Type: text/plain');
+	echo "Unable to determine email domain from //".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
+	exit(1);
+}
+
+$IMAP = dns_get_record("_imaps._tcp.".$domain, DNS_SRV)
+	?: dns_get_record("_imap._tcp.".$domain, DNS_SRV);
+$SMTP = dns_get_record("_submission._tcp.".$domain, DNS_SRV);
+
+if (!$IMAP || !$SMTP) {
+	http_response_code(500);
+	header('Content-Type: text/plain');
+	if (!$IMAP) {
+		echo "Missing/unavailable IMAP(S) SRV record for ".$domain;
+	}
+	if (!$SMTP) {
+		echo "Missing/unavailable Submission SRV record for ".$domain;
+	}
+	exit(1);
+}
+
+$sitename = getenv("EMAIL_SITENAME") ?: $domain;
+$shortname = getenv("EMAIL_SHORTNAME") ?: $sitename;
+
+header('Content-Type: application/xml');
+?>
+<?xml version="1.0"?>
+<clientConfig version="1.1">
+	<emailProvider id="<?= htmlspecialchars($domain, ENT_XML1) ?>">
+		<domain><?= htmlspecialchars($domain, ENT_XML1) ?></domain>
+		<displayName><?= htmlspecialchars($sitename, ENT_XML1) ?></displayName>
+		<displayShortName><?= htmlspecialchars($shortname, ENT_XML1) ?></displayShortName>
+<?php foreach ($IMAP as $srv) { ?>
+		<incomingServer type="imap">
+			<hostname><?= htmlspecialchars($srv['target'], ENT_XML1) ?></hostname>
+			<port><?= htmlspecialchars($srv['port'], ENT_XML1) ?></port>
+			<socketType>SSL</socketType>
+			<username>%EMAILLOCALPART%</username>
+			<authentication>password-cleartext</authentication>
+		</incomingServer>
+<?php } ?>
+<?php foreach ($SMTP as $srv) { ?>
+		<outgoingServer type="smtp">
+			<hostname><?= htmlspecialchars($srv['target'], ENT_XML1) ?></hostname>
+			<port><?= htmlspecialchars($srv['port'], ENT_XML1) ?></port>
+			<socketType>STARTTLS</socketType>
+			<username>%EMAILLOCALPART%</username>
+			<authentication>password-cleartext</authentication>
+		</outgoingServer>
+<?php } ?>
+	</emailProvider>
+</clientConfig>
-- 
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