[Rspamd] Resolve direct aliases (also fixes tagging options)

master
andryyy 2020-10-16 18:27:19 +02:00
parent 630c894229
commit 0c30d32fdb
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3 changed files with 212 additions and 4 deletions

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@ -0,0 +1,173 @@
<?php
// File size is limited by Nginx site to 10M
// To speed things up, we do not include prerequisites
header('Content-Type: text/plain');
require_once "vars.inc.php";
// Do not show errors, we log to using error_log
ini_set('error_reporting', 0);
// Init database
//$dsn = $database_type . ':host=' . $database_host . ';dbname=' . $database_name;
$dsn = $database_type . ":unix_socket=" . $database_sock . ";dbname=" . $database_name;
$opt = [
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
PDO::ATTR_EMULATE_PREPARES => false,
];
try {
$pdo = new PDO($dsn, $database_user, $database_pass, $opt);
}
catch (PDOException $e) {
error_log("ALIASEXP: " . $e . PHP_EOL);
http_response_code(501);
exit;
}
// Init Redis
$redis = new Redis();
$redis->connect('redis-mailcow', 6379);
function parse_email($email) {
if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
$a = strrpos($email, '@');
return array('local' => substr($email, 0, $a), 'domain' => substr(substr($email, $a), 1));
}
if (!function_exists('getallheaders')) {
function getallheaders() {
if (!is_array($_SERVER)) {
return array();
}
$headers = array();
foreach ($_SERVER as $name => $value) {
if (substr($name, 0, 5) == 'HTTP_') {
$headers[str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))))] = $value;
}
}
return $headers;
}
}
// Read headers
$headers = getallheaders();
// Get rcpt
$rcpt = $headers['Rcpt'];
// Remove tag
$rcpt = preg_replace('/^(.*?)\+.*(@.*)$/', '$1$2', $rcpt);
// Parse email address
$parsed_rcpt = parse_email($rcpt);
// Create array of final mailboxes
$rcpt_final_mailboxes = array();
// Skip if not a mailcow handled domain
try {
if (!$redis->hGet('DOMAIN_MAP', $parsed_rcpt['domain'])) {
exit;
}
}
catch (RedisException $e) {
error_log("ALIASEXP: " . $e . PHP_EOL);
http_response_code(504);
exit;
}
// Always assume rcpt is not a final mailbox but an alias for a mailbox or further aliases
//
// rcpt
// |
// mailbox <-- goto ---> alias1, alias2, mailbox2
// | |
// mailbox3 |
// |
// alias3 ---> mailbox4
//
try {
$stmt = $pdo->prepare("SELECT `goto` FROM `alias` WHERE `address` = :rcpt AND `active` = '1'");
$stmt->execute(array(
':rcpt' => $rcpt
));
$gotos = $stmt->fetch(PDO::FETCH_ASSOC)['goto'];
if (empty($gotos)) {
$stmt = $pdo->prepare("SELECT `goto` FROM `alias` WHERE `address` = :rcpt AND `active` = '1'");
$stmt->execute(array(
':rcpt' => '@' . $parsed_rcpt['domain']
));
$gotos = $stmt->fetch(PDO::FETCH_ASSOC)['goto'];
}
if (empty($gotos)) {
$stmt = $pdo->prepare("SELECT `target_domain` FROM `alias_domain` WHERE `alias_domain` = :rcpt AND `active` = '1'");
$stmt->execute(array(':rcpt' => $parsed_rcpt['domain']));
$goto_branch = $stmt->fetch(PDO::FETCH_ASSOC)['target_domain'];
if ($goto_branch) {
$gotos = $parsed_rcpt['local'] . '@' . $goto_branch;
}
}
$gotos_array = explode(',', $gotos);
$loop_c = 0;
while (count($gotos_array) != 0 && $loop_c <= 20) {
// Loop through all found gotos
foreach ($gotos_array as $index => &$goto) {
error_log("ALIAS EXPANDER: http pipe: query " . $goto . " as username from mailbox" . PHP_EOL);
$stmt = $pdo->prepare("SELECT `username` FROM `mailbox` WHERE `username` = :goto AND (`active`= '1' OR `active`= '2');");
$stmt->execute(array(':goto' => $goto));
$username = $stmt->fetch(PDO::FETCH_ASSOC)['username'];
if (!empty($username)) {
error_log("ALIAS EXPANDER: http pipe: mailbox found: " . $username . PHP_EOL);
// Current goto is a mailbox, save to rcpt_final_mailboxes if not a duplicate
if (!in_array($username, $rcpt_final_mailboxes)) {
$rcpt_final_mailboxes[] = $username;
}
}
else {
$parsed_goto = parse_email($goto);
if (!$redis->hGet('DOMAIN_MAP', $parsed_goto['domain'])) {
error_log("ALIAS EXPANDER:" . $goto . " is not a mailcow handled mailbox or alias address" . PHP_EOL);
}
else {
$stmt = $pdo->prepare("SELECT `goto` FROM `alias` WHERE `address` = :goto AND `active` = '1'");
$stmt->execute(array(':goto' => $goto));
$goto_branch = $stmt->fetch(PDO::FETCH_ASSOC)['goto'];
if ($goto_branch) {
error_log("ALIAS EXPANDER: http pipe: goto address " . $goto . " is a alias branch for " . $goto_branch . PHP_EOL);
$goto_branch_array = explode(',', $goto_branch);
} else {
$stmt = $pdo->prepare("SELECT `target_domain` FROM `alias_domain` WHERE `alias_domain` = :domain AND `active` AND '1'");
$stmt->execute(array(':domain' => $parsed_goto['domain']));
$goto_branch = $stmt->fetch(PDO::FETCH_ASSOC)['target_domain'];
if ($goto_branch) {
error_log("ALIAS EXPANDER: http pipe: goto domain " . $parsed_gto['domain'] . " is a domain alias branch for " . $goto_branch . PHP_EOL);
$goto_branch_array = array($parsed_gto['local'] . '@' . $goto_branch);
}
}
}
}
// goto item was processed, unset
unset($gotos_array[$index]);
}
// Merge goto branch array derived from previous loop (if any), filter duplicates and unset goto branch array
if (!empty($goto_branch_array)) {
$gotos_array = array_unique(array_merge($gotos_array, $goto_branch_array));
unset($goto_branch_array);
}
// Reindex array
$gotos_array = array_values($gotos_array);
// Force exit if loop cannot be solved
// Postfix does not allow for alias loops, so this should never happen.
$loop_c++;
error_log("ALIAS EXPANDER: http pipe: goto array count on loop #". $loop_c . " is " . count($gotos_array) . PHP_EOL);
}
}
catch (PDOException $e) {
error_log("ALIAS EXPANDER: " . $e->getMessage() . PHP_EOL);
http_response_code(502);
exit;
}
if (count($rcpt_final_mailboxes) == 1 && $rcpt_final_mailboxes[0] != $rcpt) {
error_log("ALIASEXP: direct alias " . $rcpt . " expanded to " . $rcpt_final_mailboxes[0] . PHP_EOL);
echo trim($rcpt_final_mailboxes[0]);
}

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@ -1,13 +1,13 @@
RCPT_MAILCOW_DOMAIN {
type = "rcpt";
filter = "email:domain";
type = "selector";
selector = "rcpts:domain.get_tld";
map = "redis://DOMAIN_MAP";
symbols_set = ["RCPT_MAILCOW_DOMAIN"];
}
RCPT_WANTS_SUBJECT_TAG {
type = "rcpt";
filter = "email:addr";
type = "selector";
selector = "rcpts('smtp', 'orig'):addr";
map = "redis://RCPT_WANTS_SUBJECT_TAG";
symbols_set = ["RCPT_WANTS_SUBJECT_TAG"];
}

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@ -87,6 +87,41 @@ rspamd_config:register_symbol({
priority = 10
})
rspamd_config:register_symbol({
name = 'DIRECT_ALIAS_EXPANDER',
type = 'prefilter',
callback = function(task)
local rspamd_http = require "rspamd_http"
local rcpts = task:get_recipients('smtp')
local rspamd_logger = require "rspamd_logger"
local function http_callback(err_message, code, body, headers)
if body ~= nil and body ~= "" then
rspamd_logger.infox(rspamd_config, "expanding alias to \"%s\"", body)
local final = {}
local rcpt = {}
final.addr = body
table.insert(rcpt, final)
task:set_recipients('smtp', rcpt)
end
end
if rcpts and #rcpts == 1 then
for _,rcpt in ipairs(rcpts) do
rspamd_http.request({
task=task,
url='http://nginx:8081/aliasexp.php',
body=task:get_content(),
callback=http_callback,
headers={Rcpt=rcpt['addr']},
})
end
end
end,
priority = 1
})
rspamd_config:register_symbol({
name = 'KEEP_SPAM',
type = 'prefilter',