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/outlook.php | 114 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 php/outlook.php

(limited to 'php/outlook.php')

diff --git a/php/outlook.php b/php/outlook.php
new file mode 100644
index 0000000..f6edba6
--- /dev/null
+++ b/php/outlook.php
@@ -0,0 +1,114 @@
+<?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
+
+// Outlook autoconfiguration described at:
+// https://docs.microsoft.com/en-us/previous-versions/office/office-2010/cc511507(v=office.14)
+//
+// Should be installed at:
+//	https://[domain]/autodiscover/autodiscover.xml
+//	https://autodiscover.[domain]/autodiscover/autodiscover.xml
+
+if ($_SERVER['REQUEST_URI'] == "/autodiscover/autodiscover.xml"
+		&& preg_match('/^autodiscover\.(.*)$/', $_SERVER['HTTP_HOST'], $matches))
+{
+	$domain = $matches[1];
+}
+else if ($_SERVER['REQUEST_URI'] == "/autodiscover/autodiscover.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") ?: $sitename;
+
+if (($xml = simplexml_load_string(file_get_contents('php://input'))) != false
+		&& $xml->registerXPathNamespace('a',
+			'http://schemas.microsoft.com/exchange/autodiscover/outlook/requestschema/2006')
+		&& ($emails = $xml->xpath("/a:Autodiscover/a:Request/a:EMailAddress")) != false
+		&& $emails != null
+		&& count($emails) == 1
+		&& preg_match("/^([^@]*)@([^@]*)$/", $emails[0], $parts))
+{
+	$login = $parts[1];
+}
+else {
+	$login = "";
+}
+
+header('Content-Type: application/xml');
+?>
+<?xml version="1.0"?>
+<Autodiscover xmlns="http://schemas.microsoft.com/exchange/autodiscover/responseschema/2006">
+	<Response xmlns="http://schemas.microsoft.com/exchange/autodiscover/outlook/responseschema/2006a">
+		<User>
+			<DisplayName><?= htmlspecialchars($sitename, ENT_XML1) ?></DisplayName>
+		</User>
+		<Account>
+			<AccountType>email</AccountType>
+			<Action>settings</Action>
+<?php foreach ($IMAP as $srv) { ?>
+			<Protocol>
+				<Type>IMAP</Type>
+				<Server><?= htmlspecialchars($srv['target'], ENT_XML1) ?></Server>
+				<Port><?= htmlspecialchars($srv['port'], ENT_XML1) ?></Port>
+				<DomainRequired>off</DomainRequired>
+				<SPA>off</SPA>
+				<SSL>on</SSL>
+				<AuthRequired>on</AuthRequired>
+				<LoginName><?= htmlspecialchars($login, ENT_XML1) ?></LoginName>
+			</Protocol>
+<?php } ?>
+<?php foreach ($SMTP as $srv) { ?>
+			<Protocol>
+				<Type>SMTP</Type>
+				<Server><?= htmlspecialchars($srv['target'], ENT_XML1) ?></Server>
+				<Port><?= htmlspecialchars($srv['port'], ENT_XML1) ?></Port>
+				<DomainRequired>off</DomainRequired>
+				<SPA>off</SPA>
+				<SSL>on</SSL>
+				<AuthRequired>on</AuthRequired>
+				<LoginName><?= htmlspecialchars($login, ENT_XML1) ?></LoginName>
+			</Protocol>
+<?php } ?>
+		</Account>
+	</Response>
+</Autodiscover>
-- 
cgit v1.2.1