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Added Autoconfig detect through DNS SRV (RFC 6186 & 8314) and disable MX

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the-djmaze 2024-03-26 18:24:57 +01:00
parent f9048d1209
commit b96cb41876
1 changed files with 81 additions and 38 deletions
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119
snappymail/v/0.0.0/app/libraries/RainLoop/Providers/Domain/Autoconfig.php
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@ -13,44 +13,15 @@ abstract class Autoconfig
$domain = \MailSo\Base\Utils::getEmailAddressDomain($emailaddress);
// $domain = \SnappyMail\IDN::toAscii($domain);
$domain = \strtolower(\idn_to_ascii($domain));
// First try
$autoconfig = static::resolve($domain, $emailaddress);
if ($autoconfig) {
return $autoconfig;
}
// Else try MX
$suffixes = static::publicsuffixes();
$hostnames = [];
foreach (\SnappyMail\DNS::MX($domain) as $hostname) {
// Extract only the second-level domain from the MX hostname
$mxbasedomain = \explode('.', $hostname);
$i = -2;
while (\in_array(\implode('.', \array_slice($mxbasedomain, $i)), $suffixes)) {
--$i;
}
$mxbasedomain = \implode('.', \array_slice($mxbasedomain, $i));
if ($mxbasedomain) {
$mxfulldomain = $mxbasedomain;
if (\substr_count($hostname, '.') > \substr_count($mxbasedomain, '.')) {
// Remove the first component from the MX hostname
$mxfulldomain = \explode('.', $hostname, 2)[1];
}
$hostnames[$mxfulldomain] = $mxbasedomain;
}
}
foreach ($hostnames as $mxfulldomain => $mxbasedomain) {
if ($domain != $mxfulldomain) {
$autoconfig = static::resolve($mxfulldomain, $emailaddress);
if (!$autoconfig && $mxfulldomain != $mxbasedomain && $domain != $mxbasedomain) {
$autoconfig = static::resolve($mxbasedomain, $emailaddress);
}
if ($autoconfig) {
return $autoconfig;
}
}
}
// Else try Microsoft autodiscover
return static::autodiscover($domain);
return
// First try autoconfig
static::resolve($domain, $emailaddress)
// Else try MX, but it is mostly useless
// ?: static::mx($domain, $emailaddress)
// Else try Microsoft autodiscover
?: static::autodiscover($domain)
// Else try DNS SRV
?: static::srv($domain);
}
private static function resolve(string $domain, string $emailaddress) : ?array
@ -116,6 +87,78 @@ abstract class Autoconfig
return $list ?: [];
}
private static function mx(string $domain, string $emailaddress) : ?array
{
$suffixes = static::publicsuffixes();
foreach (\SnappyMail\DNS::MX($domain) as $hostname) {
// Extract only the second-level domain from the MX hostname
$mxbasedomain = \explode('.', $hostname);
$i = -2;
while (\in_array(\implode('.', \array_slice($mxbasedomain, $i)), $suffixes)) {
--$i;
}
$mxbasedomain = \implode('.', \array_slice($mxbasedomain, $i));
if ($mxbasedomain) {
$mxfulldomain = $mxbasedomain;
if (\substr_count($hostname, '.') > \substr_count($mxbasedomain, '.')) {
// Remove the first component from the MX hostname
$mxfulldomain = \explode('.', $hostname, 2)[1];
}
$hostnames[$mxfulldomain] = $mxbasedomain;
}
}
foreach ($hostnames as $mxfulldomain => $mxbasedomain) {
if ($domain != $mxfulldomain) {
$autoconfig = static::resolve($mxfulldomain, $emailaddress);
if (!$autoconfig && $mxfulldomain != $mxbasedomain && $domain != $mxbasedomain) {
$autoconfig = static::resolve($mxbasedomain, $emailaddress);
}
if ($autoconfig) {
return $autoconfig;
}
}
}
}
/**
* https://datatracker.ietf.org/doc/html/rfc6186
* https://datatracker.ietf.org/doc/html/rfc8314
*/
private static function srv(string $domain) : ?array
{
$srv = \SnappyMail\DNS::SRV('_submissions._tcp.'.$domain);
if (empty($srv[0]['target'])) {
$srv = \SnappyMail\DNS::SRV('_submission._tcp.'.$domain);
}
if (!empty($srv[0]['target'])) {
$result = [
'incomingServer' => [],
'outgoingServer' => [
'hostname' => $srv[0]['target'],
'port' => $srv[0]['port'],
'socketType' => (587 == $srv[0]['port']) ? 'STARTTLS' : (465 == $srv[0]['port'] ? 'SSL' : ''),
'authentication' => 'password-cleartext',
'username' => '%EMAILADDRESS%'
]
];
$srv = \SnappyMail\DNS::SRV('_imaps._tcp.'.$domain);
if (empty($srv[0]['target'])) {
$srv = \SnappyMail\DNS::SRV('_imap._tcp.'.$domain);
}
if (!empty($srv[0]['target'])) {
$result['incomingServer'][] = [
'hostname' => $srv[0]['target'],
'port' => $srv[0]['port'],
'socketType' => 993 == $srv[0]['port'] ? 'SSL' : '',
'authentication' => 'password-cleartext',
'username' => '%EMAILADDRESS%'
];
return $result;
}
}
return null;
}
/**
* This is Microsoft
*/