326 lines
12 KiB
PHP
326 lines
12 KiB
PHP
<?php
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function dkim($_action, $_data = null, $privkey = false) {
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global $redis;
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global $lang;
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switch ($_action) {
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case 'add':
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$key_length = intval($_data['key_size']);
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$dkim_selector = (isset($_data['dkim_selector'])) ? $_data['dkim_selector'] : 'dkim';
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$domains = array_map('trim', preg_split( "/( |,|;|\n)/", $_data['domains']));
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$domains = array_filter($domains);
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foreach ($domains as $domain) {
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if (!is_valid_domain_name($domain) || !is_numeric($key_length)) {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('dkim_domain_or_sel_invalid', $domain)
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);
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continue;
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}
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if ($redis->hGet('DKIM_PUB_KEYS', $domain)) {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('dkim_domain_or_sel_invalid', $domain)
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);
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continue;
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}
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if (!ctype_alnum(str_replace(['-', '_'], '', $dkim_selector))) {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('dkim_domain_or_sel_invalid', $domain)
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);
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continue;
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}
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if (!hasDomainAccess($_SESSION['mailcow_cc_username'], $_SESSION['mailcow_cc_role'], $domain)) {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('access_denied', $domain)
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);
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continue;
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}
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$config = array(
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"digest_alg" => "sha256",
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"private_key_bits" => $key_length,
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"private_key_type" => OPENSSL_KEYTYPE_RSA,
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);
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if ($keypair_ressource = openssl_pkey_new($config)) {
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$key_details = openssl_pkey_get_details($keypair_ressource);
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$pubKey = implode(array_slice(
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array_filter(
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explode(PHP_EOL, $key_details['key'])
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), 1, -1)
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);
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// Save public key and selector to redis
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try {
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$redis->hSet('DKIM_PUB_KEYS', $domain, $pubKey);
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$redis->hSet('DKIM_SELECTORS', $domain, $dkim_selector);
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}
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catch (RedisException $e) {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('redis_error', $e)
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);
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continue;
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}
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// Export private key and save private key to redis
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openssl_pkey_export($keypair_ressource, $privKey);
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if (isset($privKey) && !empty($privKey)) {
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try {
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$redis->hSet('DKIM_PRIV_KEYS', $dkim_selector . '.' . $domain, trim($privKey));
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}
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catch (RedisException $e) {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('redis_error', $e)
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);
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continue;
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}
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}
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$_SESSION['return'][] = array(
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'type' => 'success',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('dkim_added', $domain)
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);
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}
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else {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('dkim_domain_or_sel_invalid', $domain)
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);
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continue;
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}
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}
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break;
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case 'duplicate':
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if ($_SESSION['mailcow_cc_role'] != "admin") {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => 'access_denied'
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);
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return false;
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}
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$from_domain = $_data['from_domain'];
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$from_domain_dkim = dkim('details', $from_domain, true);
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if (empty($from_domain_dkim)) {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('dkim_domain_or_sel_invalid', $from_domain)
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);
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continue;
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}
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$to_domains = (array)$_data['to_domain'];
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$to_domains = array_filter($to_domains);
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foreach ($to_domains as $to_domain) {
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try {
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$redis->hSet('DKIM_PUB_KEYS', $to_domain, $from_domain_dkim['pubkey']);
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$redis->hSet('DKIM_SELECTORS', $to_domain, $from_domain_dkim['dkim_selector']);
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$redis->hSet('DKIM_PRIV_KEYS', $from_domain_dkim['dkim_selector'] . '.' . $to_domain, base64_decode(trim($from_domain_dkim['privkey'])));
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}
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catch (RedisException $e) {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('redis_error', $e)
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);
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continue;
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}
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$_SESSION['return'][] = array(
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'type' => 'success',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('dkim_duplicated', $from_domain, $to_domain)
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);
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}
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break;
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case 'import':
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if ($_SESSION['mailcow_cc_role'] != "admin") {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => 'access_denied'
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);
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return false;
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}
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$private_key_input = trim($_data['private_key_file']);
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$overwrite_existing = intval($_data['overwrite_existing']);
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$private_key_normalized = preg_replace('~\r\n?~', "\n", $private_key_input);
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$private_key = openssl_pkey_get_private($private_key_normalized);
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if ($ssl_error = openssl_error_string()) {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('private_key_error', $ssl_error)
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);
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return false;
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}
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// Explode by nl
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$pem_public_key_array = explode(PHP_EOL, trim(openssl_pkey_get_details($private_key)['key']));
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// Remove first and last line/item
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array_shift($pem_public_key_array);
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array_pop($pem_public_key_array);
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// Implode as single string
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$pem_public_key = implode('', (array)$pem_public_key_array);
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$dkim_selector = (isset($_data['dkim_selector'])) ? $_data['dkim_selector'] : 'dkim';
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$domain = $_data['domain'];
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if (!is_valid_domain_name($domain)) {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('dkim_domain_or_sel_invalid', $domain)
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);
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return false;
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}
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if ($redis->hGet('DKIM_PUB_KEYS', $domain)) {
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if ($overwrite_existing == 0) {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('dkim_domain_or_sel_exists', $domain)
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);
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return false;
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}
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}
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if (!ctype_alnum($dkim_selector)) {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('dkim_domain_or_sel_invalid', $domain)
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);
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return false;
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}
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try {
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dkim('delete', (array)$domain);
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$redis->hSet('DKIM_PUB_KEYS', $domain, $pem_public_key);
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$redis->hSet('DKIM_SELECTORS', $domain, $dkim_selector);
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$redis->hSet('DKIM_PRIV_KEYS', $dkim_selector . '.' . $domain, $private_key_normalized);
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}
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catch (RedisException $e) {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('redis_error', $e)
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);
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return false;
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}
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unset($private_key_normalized);
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unset($private_key);
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unset($private_key_input);
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try {
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}
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catch (RedisException $e) {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('redis_error', $e)
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);
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return false;
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}
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$_SESSION['return'][] = array(
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'type' => 'success',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('dkim_added', $domain)
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);
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return true;
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break;
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case 'details':
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if (!hasDomainAccess($_SESSION['mailcow_cc_username'], $_SESSION['mailcow_cc_role'], $_data) && $_SESSION['mailcow_cc_role'] != "admin") {
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return false;
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}
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$dkimdata = array();
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if ($redis_dkim_key_data = $redis->hGet('DKIM_PUB_KEYS', $_data)) {
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$dkimdata['pubkey'] = $redis_dkim_key_data;
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if (strlen($dkimdata['pubkey']) < 391) {
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$dkimdata['length'] = "1024";
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}
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elseif (strlen($dkimdata['pubkey']) < 736) {
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$dkimdata['length'] = "2048";
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}
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elseif (strlen($dkimdata['pubkey']) < 1416) {
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$dkimdata['length'] = "4096";
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}
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else {
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$dkimdata['length'] = ">= 8192";
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}
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if ($GLOBALS['SPLIT_DKIM_255'] === true) {
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$dkim_txt_tmp = str_split('v=DKIM1;k=rsa;t=s;s=email;p=' . $redis_dkim_key_data, 255);
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$dkimdata['dkim_txt'] = sprintf('"%s"', implode('" "', (array)$dkim_txt_tmp ) );
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}
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else {
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$dkimdata['dkim_txt'] = 'v=DKIM1;k=rsa;t=s;s=email;p=' . $redis_dkim_key_data;
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}
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$dkimdata['dkim_selector'] = $redis->hGet('DKIM_SELECTORS', $_data);
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if ($GLOBALS['SHOW_DKIM_PRIV_KEYS'] || $privkey == true) {
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$dkimdata['privkey'] = base64_encode($redis->hGet('DKIM_PRIV_KEYS', $dkimdata['dkim_selector'] . '.' . $_data));
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}
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else {
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$dkimdata['privkey'] = '';
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}
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}
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return $dkimdata;
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break;
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case 'blind':
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if ($_SESSION['mailcow_cc_role'] != "admin") {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => 'access_denied'
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);
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return false;
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}
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$blinddkim = array();
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foreach ($redis->hKeys('DKIM_PUB_KEYS') as $redis_dkim_domain) {
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$blinddkim[] = $redis_dkim_domain;
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}
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return array_diff($blinddkim, array_merge(mailbox('get', 'domains'), mailbox('get', 'alias_domains')));
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break;
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case 'delete':
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$domains = (array)$_data['domains'];
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if ($_SESSION['mailcow_cc_role'] != "admin") {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => 'access_denied'
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);
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return false;
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}
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foreach ($domains as $domain) {
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if (!is_valid_domain_name($domain)) {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('dkim_domain_or_sel_invalid', $domain)
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);
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continue;
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}
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try {
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$selector = $redis->hGet('DKIM_SELECTORS', $domain);
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$redis->hDel('DKIM_PUB_KEYS', $domain);
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$redis->hDel('DKIM_PRIV_KEYS', $selector . '.' . $domain);
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$redis->hDel('DKIM_SELECTORS', $domain);
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}
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catch (RedisException $e) {
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$_SESSION['return'][] = array(
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'type' => 'danger',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('redis_error', $e)
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);
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continue;
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}
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$_SESSION['return'][] = array(
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'type' => 'success',
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'log' => array(__FUNCTION__, $_action, $_data),
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'msg' => array('dkim_removed', htmlspecialchars($domain))
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);
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}
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break;
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}
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}
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