mailcow/data/web/inc/functions.dkim.inc.php

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2017-05-27 05:02:04 +08:00
<?php
function dkim($_action, $_data = null) {
global $redis;
global $lang;
switch ($_action) {
case 'add':
if ($_SESSION['mailcow_cc_role'] != "admin") {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => 'access_denied'
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);
return false;
}
$key_length = intval($_data['key_size']);
$dkim_selector = (isset($_data['dkim_selector'])) ? $_data['dkim_selector'] : 'dkim';
$domain = $_data['domain'];
if (!is_valid_domain_name($domain) || !is_numeric($key_length)) {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => 'dkim_domain_or_sel_invalid'
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);
return false;
}
if ($redis->hGet('DKIM_PUB_KEYS', $domain)) {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => 'dkim_domain_or_sel_invalid'
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);
return false;
}
if (!ctype_alnum($dkim_selector)) {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => 'dkim_domain_or_sel_invalid'
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);
return false;
}
$config = array(
"digest_alg" => "sha256",
"private_key_bits" => $key_length,
"private_key_type" => OPENSSL_KEYTYPE_RSA,
);
if ($keypair_ressource = openssl_pkey_new($config)) {
$key_details = openssl_pkey_get_details($keypair_ressource);
$pubKey = implode(array_slice(
array_filter(
explode(PHP_EOL, $key_details['key'])
), 1, -1)
);
// Save public key and selector to redis
try {
$redis->hSet('DKIM_PUB_KEYS', $domain, $pubKey);
$redis->hSet('DKIM_SELECTORS', $domain, $dkim_selector);
}
catch (RedisException $e) {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('redis_error', $e)
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);
return false;
}
// Export private key and save private key to redis
openssl_pkey_export($keypair_ressource, $privKey);
if (isset($privKey) && !empty($privKey)) {
try {
$redis->hSet('DKIM_PRIV_KEYS', $dkim_selector . '.' . $domain, trim($privKey));
}
catch (RedisException $e) {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('redis_error', $e)
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);
return false;
}
}
$_SESSION['return'] = array(
'type' => 'success',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => 'dkim_added'
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);
return true;
}
else {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => 'dkim_domain_or_sel_invalid'
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);
return false;
}
break;
case 'import':
if ($_SESSION['mailcow_cc_role'] != "admin") {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => 'access_denied'
);
return false;
}
$private_key_input = trim($_data['private_key_file']);
$private_key_normalized = preg_replace('~\r\n?~', "\n", $private_key_input);
$private_key = openssl_pkey_get_private($private_key_normalized);
if ($ssl_error = openssl_error_string()) {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('private_key_error', $ssl_error)
);
return false;
}
// Explode by nl
$pem_public_key_array = explode(PHP_EOL, trim(openssl_pkey_get_details($private_key)['key']));
// Remove first and last line/item
array_shift($pem_public_key_array);
array_pop($pem_public_key_array);
// Implode as single string
$pem_public_key = implode('', $pem_public_key_array);
$dkim_selector = (isset($_data['dkim_selector'])) ? $_data['dkim_selector'] : 'dkim';
$domain = $_data['domain'];
if (!is_valid_domain_name($domain)) {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => 'dkim_domain_or_sel_invalid'
);
return false;
}
if ($redis->hGet('DKIM_PUB_KEYS', $domain)) {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => 'dkim_domain_or_sel_invalid'
);
return false;
}
if (!ctype_alnum($dkim_selector)) {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => 'dkim_domain_or_sel_invalid'
);
return false;
}
try {
$redis->hSet('DKIM_PUB_KEYS', $domain, $pem_public_key);
$redis->hSet('DKIM_SELECTORS', $domain, $dkim_selector);
$redis->hSet('DKIM_PRIV_KEYS', $dkim_selector . '.' . $domain, $private_key_normalized);
}
catch (RedisException $e) {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('redis_error', $e)
);
return false;
}
unset($private_key_normalized);
unset($private_key);
unset($private_key_input);
try {
}
catch (RedisException $e) {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('redis_error', $e)
);
return false;
}
$_SESSION['return'] = array(
'type' => 'success',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => 'dkim_added'
);
return true;
break;
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case 'details':
if (!hasDomainAccess($_SESSION['mailcow_cc_username'], $_SESSION['mailcow_cc_role'], $_data)) {
return false;
}
$dkimdata = array();
if ($redis_dkim_key_data = $redis->hGet('DKIM_PUB_KEYS', $_data)) {
$dkimdata['pubkey'] = $redis_dkim_key_data;
if (strlen($dkimdata['pubkey']) < 391) {
$dkimdata['length'] = "1024";
}
elseif (strlen($dkimdata['pubkey']) < 736) {
$dkimdata['length'] = "2048";
}
elseif (strlen($dkimdata['pubkey']) < 1416) {
$dkimdata['length'] = "4096";
}
else {
$dkimdata['length'] = ">= 8192";
}
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$dkimdata['dkim_txt'] = 'v=DKIM1;k=rsa;t=s;s=email;p=' . $redis_dkim_key_data;
$dkimdata['dkim_selector'] = $redis->hGet('DKIM_SELECTORS', $_data);
$dkimdata['privkey'] = $redis->hGet('DKIM_PRIV_KEYS', $dkimdata['dkim_selector'] . $_data);
if ($GLOBALS['SHOW_DKIM_PRIV_KEYS'] === true) {
$dkimdata['privkey'] = base64_encode($redis->hGet('DKIM_PRIV_KEYS', $dkimdata['dkim_selector'] . '.' . $_data));
}
else {
$dkimdata['privkey'] = base64_encode('Please set $SHOW_DKIM_PRIV_KEYS to true to show DKIM private keys.');
}
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}
return $dkimdata;
break;
case 'blind':
if ($_SESSION['mailcow_cc_role'] != "admin") {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => 'access_denied'
);
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return false;
}
$blinddkim = array();
foreach ($redis->hKeys('DKIM_PUB_KEYS') as $redis_dkim_domain) {
$blinddkim[] = $redis_dkim_domain;
}
return array_diff($blinddkim, array_merge(mailbox('get', 'domains'), mailbox('get', 'alias_domains')));
break;
case 'delete':
$domains = (array)$_data['domains'];
if ($_SESSION['mailcow_cc_role'] != "admin") {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => 'access_denied'
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);
return false;
}
foreach ($domains as $domain) {
if (!is_valid_domain_name($domain)) {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => 'dkim_domain_or_sel_invalid'
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);
return false;
}
try {
$selector = $redis->hGet('DKIM_SELECTORS', $domain);
$redis->hDel('DKIM_PUB_KEYS', $domain);
$redis->hDel('DKIM_PRIV_KEYS', $selector . '.' . $domain);
$redis->hDel('DKIM_SELECTORS', $domain);
}
catch (RedisException $e) {
$_SESSION['return'] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('redis_error', $e)
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);
return false;
}
}
$_SESSION['return'] = array(
'type' => 'success',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('dkim_removed', htmlspecialchars(implode(', ', $domains)))
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);
break;
}
}