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functions.dkim.inc.php
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functions.dkim.inc.php
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<?php
function dkim($_action, $_data = null, $privkey = false) {
global $redis;
global $lang;
switch ($_action) {
case 'add':
$key_length = intval($_data['key_size']);
$dkim_selector = (isset($_data['dkim_selector'])) ? $_data['dkim_selector'] : 'dkim';
$domains = array_map('trim', preg_split( "/( |,|;|\n)/", $_data['domains']));
$domains = array_filter($domains);
foreach ($domains as $domain) {
if (!is_valid_domain_name($domain) || !is_numeric($key_length)) {
$_SESSION['return'][] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('dkim_domain_or_sel_invalid', $domain)
);
continue;
}
if ($redis->hGet('DKIM_PUB_KEYS', $domain)) {
$_SESSION['return'][] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('dkim_domain_or_sel_invalid', $domain)
);
continue;
}
if (!ctype_alnum(str_replace(['-', '_', '.'], '', $dkim_selector))) {
$_SESSION['return'][] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('dkim_domain_or_sel_invalid', $domain)
);
continue;
}
if (!hasDomainAccess($_SESSION['mailcow_cc_username'], $_SESSION['mailcow_cc_role'], $domain)) {
$_SESSION['return'][] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('access_denied', $domain)
);
continue;
}
$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', $e)
);
continue;
}
// Export private key and save private key to redis
openssl_pkey_export($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)
);
continue;
}
}
$_SESSION['return'][] = array(
'type' => 'success',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('dkim_added', $domain)
);
}
else {
$_SESSION['return'][] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('dkim_domain_or_sel_invalid', $domain)
);
continue;
}
}
break;
case 'duplicate':
if ($_SESSION['mailcow_cc_role'] != "admin") {
$_SESSION['return'][] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => 'access_denied'
);
return false;
}
$from_domain = $_data['from_domain'];
$from_domain_dkim = dkim('details', $from_domain, true);
if (empty($from_domain_dkim)) {
$_SESSION['return'][] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('dkim_domain_or_sel_invalid', $from_domain)
);
continue;
}
$to_domains = (array)$_data['to_domain'];
$to_domains = array_filter($to_domains);
foreach ($to_domains as $to_domain) {
try {
$redis->hSet('DKIM_PUB_KEYS', $to_domain, $from_domain_dkim['pubkey']);
$redis->hSet('DKIM_SELECTORS', $to_domain, $from_domain_dkim['dkim_selector']);
$redis->hSet('DKIM_PRIV_KEYS', $from_domain_dkim['dkim_selector'] . '.' . $to_domain, base64_decode(trim($from_domain_dkim['privkey'])));
}
catch (RedisException $e) {
$_SESSION['return'][] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('redis_error', $e)
);
continue;
}
$_SESSION['return'][] = array(
'type' => 'success',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('dkim_duplicated', $from_domain, $to_domain)
);
}
break;
case 'import':
if ($_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']);
$overwrite_existing = intval($_data['overwrite_existing']);
$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
$pem_public_key = implode('', (array)$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' => array('dkim_domain_or_sel_invalid', $domain)
);
return false;
}
if ($redis->hGet('DKIM_PUB_KEYS', $domain)) {
if ($overwrite_existing == 0) {
$_SESSION['return'][] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('dkim_domain_or_sel_exists', $domain)
);
return false;
}
}
if (!ctype_alnum(str_replace(['-', '_', '.'], '', $dkim_selector))) {
$_SESSION['return'][] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('dkim_domain_or_sel_invalid', $domain)
);
return false;
}
try {
dkim('delete', array('domains' => $domain));
$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' => array('dkim_added', $domain)
);
return true;
break;
case 'details':
if (!hasDomainAccess($_SESSION['mailcow_cc_username'], $_SESSION['mailcow_cc_role'], $_data) && $_SESSION['mailcow_cc_role'] != "admin") {
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']) < 564) {
$dkimdata['length'] = "2048";
}
elseif (strlen($dkimdata['pubkey']) < 736) {
$dkimdata['length'] = "3072";
}
elseif (strlen($dkimdata['pubkey']) < 1416) {
$dkimdata['length'] = "4096";
}
else {
$dkimdata['length'] = ">= 8192";
}
if ($GLOBALS['SPLIT_DKIM_255'] === true) {
$dkim_txt_tmp = str_split('v=DKIM1;k=rsa;t=s;s=email;p=' . $redis_dkim_key_data, 255);
$dkimdata['dkim_txt'] = sprintf('"%s"', implode('" "', (array)$dkim_txt_tmp ) );
}
else {
$dkimdata['dkim_txt'] = 'v=DKIM1;k=rsa;t=s;s=email;p=' . $redis_dkim_key_data;
}
$dkimdata['dkim_selector'] = $redis->hGet('DKIM_SELECTORS', $_data);
if ($GLOBALS['SHOW_DKIM_PRIV_KEYS'] || $privkey == true) {
$dkimdata['privkey'] = base64_encode($redis->hGet('DKIM_PRIV_KEYS', $dkimdata['dkim_selector'] . '.' . $_data));
}
else {
$dkimdata['privkey'] = '';
}
}
return $dkimdata;
break;
case 'blind':
if ($_SESSION['mailcow_cc_role'] != "admin") {
$_SESSION['return'][] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => 'access_denied'
);
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, $_data),
'msg' => 'access_denied'
);
return false;
}
foreach ($domains as $domain) {
if (!is_valid_domain_name($domain)) {
$_SESSION['return'][] = array(
'type' => 'danger',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('dkim_domain_or_sel_invalid', $domain)
);
continue;
}
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)
);
continue;
}
$_SESSION['return'][] = array(
'type' => 'success',
'log' => array(__FUNCTION__, $_action, $_data),
'msg' => array('dkim_removed', htmlspecialchars($domain))
);
}
break;
}
}

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functions.dkim.inc.php (12 KB)

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