Matthias Andreas Benkard | b382b10 | 2021-01-02 15:32:21 +0100 | [diff] [blame] | 1 | <?php
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| 2 | // File size is limited by Nginx site to 10M
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| 3 | // To speed things up, we do not include prerequisites
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| 4 | header('Content-Type: text/plain');
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| 5 | require_once "vars.inc.php";
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| 6 | // Do not show errors, we log to using error_log
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| 7 | ini_set('error_reporting', 0);
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| 8 | // Init database
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| 9 | //$dsn = $database_type . ':host=' . $database_host . ';dbname=' . $database_name;
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| 10 | $dsn = $database_type . ":unix_socket=" . $database_sock . ";dbname=" . $database_name;
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| 11 | $opt = [
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| 12 | PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
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| 13 | PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
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| 14 | PDO::ATTR_EMULATE_PREPARES => false,
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| 15 | ];
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| 16 | try {
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| 17 | $pdo = new PDO($dsn, $database_user, $database_pass, $opt);
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| 18 | }
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| 19 | catch (PDOException $e) {
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| 20 | error_log("QUARANTINE: " . $e . PHP_EOL);
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| 21 | http_response_code(501);
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| 22 | exit;
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| 23 | }
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| 24 | // Init Redis
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| 25 | $redis = new Redis();
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| 26 | $redis->connect('redis-mailcow', 6379);
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| 27 |
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| 28 | // Functions
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| 29 | function parse_email($email) {
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| 30 | if(!filter_var($email, FILTER_VALIDATE_EMAIL)) return false;
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| 31 | $a = strrpos($email, '@');
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| 32 | return array('local' => substr($email, 0, $a), 'domain' => substr(substr($email, $a), 1));
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| 33 | }
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| 34 | if (!function_exists('getallheaders')) {
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| 35 | function getallheaders() {
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| 36 | if (!is_array($_SERVER)) {
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| 37 | return array();
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| 38 | }
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| 39 | $headers = array();
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| 40 | foreach ($_SERVER as $name => $value) {
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| 41 | if (substr($name, 0, 5) == 'HTTP_') {
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| 42 | $headers[str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))))] = $value;
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| 43 | }
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| 44 | }
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| 45 | return $headers;
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| 46 | }
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| 47 | }
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| 48 |
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| 49 | $raw_data_content = file_get_contents('php://input');
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| 50 | $raw_data = mb_convert_encoding($raw_data_content, 'HTML-ENTITIES', "UTF-8");
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| 51 | $headers = getallheaders();
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| 52 |
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| 53 | $qid = $headers['X-Rspamd-Qid'];
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| 54 | $fuzzy = $headers['X-Rspamd-Fuzzy'];
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| 55 | $subject = $headers['X-Rspamd-Subject'];
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| 56 | $score = $headers['X-Rspamd-Score'];
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| 57 | $rcpts = $headers['X-Rspamd-Rcpt'];
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| 58 | $user = $headers['X-Rspamd-User'];
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| 59 | $ip = $headers['X-Rspamd-Ip'];
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| 60 | $action = $headers['X-Rspamd-Action'];
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| 61 | $sender = $headers['X-Rspamd-From'];
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| 62 | $symbols = $headers['X-Rspamd-Symbols'];
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| 63 |
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| 64 | $raw_size = (int)$_SERVER['CONTENT_LENGTH'];
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| 65 |
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| 66 | if (empty($sender)) {
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| 67 | error_log("QUARANTINE: Unknown sender, assuming empty-env-from@localhost" . PHP_EOL);
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| 68 | $sender = 'empty-env-from@localhost';
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| 69 | }
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| 70 |
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| 71 | if ($fuzzy == 'unknown') {
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| 72 | $fuzzy = '[]';
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| 73 | }
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| 74 |
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| 75 | try {
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| 76 | $max_size = (int)$redis->Get('Q_MAX_SIZE');
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| 77 | if (($max_size * 1048576) < $raw_size) {
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| 78 | error_log(sprintf("QUARANTINE: Message too large: %d b exceeds %d b", $raw_size, ($max_size * 1048576)) . PHP_EOL);
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| 79 | http_response_code(505);
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| 80 | exit;
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| 81 | }
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| 82 | if ($exclude_domains = $redis->Get('Q_EXCLUDE_DOMAINS')) {
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| 83 | $exclude_domains = json_decode($exclude_domains, true);
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| 84 | }
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| 85 | $retention_size = (int)$redis->Get('Q_RETENTION_SIZE');
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| 86 | }
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| 87 | catch (RedisException $e) {
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| 88 | error_log("QUARANTINE: " . $e . PHP_EOL);
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| 89 | http_response_code(504);
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| 90 | exit;
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| 91 | }
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| 92 |
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| 93 | $rcpt_final_mailboxes = array();
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| 94 |
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| 95 | // Loop through all rcpts
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| 96 | foreach (json_decode($rcpts, true) as $rcpt) {
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| 97 | // Remove tag
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| 98 | $rcpt = preg_replace('/^(.*?)\+.*(@.*)$/', '$1$2', $rcpt);
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| 99 |
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| 100 | // Break rcpt into local part and domain part
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| 101 | $parsed_rcpt = parse_email($rcpt);
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| 102 |
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| 103 | // Skip if not a mailcow handled domain
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| 104 | try {
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| 105 | if (!$redis->hGet('DOMAIN_MAP', $parsed_rcpt['domain'])) {
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| 106 | continue;
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| 107 | }
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| 108 | }
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| 109 | catch (RedisException $e) {
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| 110 | error_log("QUARANTINE: " . $e . PHP_EOL);
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| 111 | http_response_code(504);
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| 112 | exit;
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| 113 | }
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| 114 |
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| 115 | // Skip if domain is excluded
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| 116 | if (in_array($parsed_rcpt['domain'], $exclude_domains)) {
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| 117 | error_log(sprintf("QUARANTINE: Skipped domain %s", $parsed_rcpt['domain']) . PHP_EOL);
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| 118 | continue;
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| 119 | }
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| 120 |
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| 121 | // Always assume rcpt is not a final mailbox but an alias for a mailbox or further aliases
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| 122 | //
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| 123 | // rcpt
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| 124 | // |
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| 125 | // mailbox <-- goto ---> alias1, alias2, mailbox2
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| 126 | // | |
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| 127 | // mailbox3 |
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| 128 | // |
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| 129 | // alias3 ---> mailbox4
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| 130 | //
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| 131 | try {
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| 132 | $stmt = $pdo->prepare("SELECT `goto` FROM `alias` WHERE `address` = :rcpt AND `active` = '1'");
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| 133 | $stmt->execute(array(
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| 134 | ':rcpt' => $rcpt
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| 135 | ));
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| 136 | $gotos = $stmt->fetch(PDO::FETCH_ASSOC)['goto'];
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| 137 | if (empty($gotos)) {
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| 138 | $stmt = $pdo->prepare("SELECT `goto` FROM `alias` WHERE `address` = :rcpt AND `active` = '1'");
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| 139 | $stmt->execute(array(
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| 140 | ':rcpt' => '@' . $parsed_rcpt['domain']
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| 141 | ));
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| 142 | $gotos = $stmt->fetch(PDO::FETCH_ASSOC)['goto'];
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| 143 | }
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| 144 | if (empty($gotos)) {
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| 145 | $stmt = $pdo->prepare("SELECT `target_domain` FROM `alias_domain` WHERE `alias_domain` = :rcpt AND `active` = '1'");
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| 146 | $stmt->execute(array(':rcpt' => $parsed_rcpt['domain']));
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| 147 | $goto_branch = $stmt->fetch(PDO::FETCH_ASSOC)['target_domain'];
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| 148 | if ($goto_branch) {
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| 149 | $gotos = $parsed_rcpt['local'] . '@' . $goto_branch;
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| 150 | }
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| 151 | }
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| 152 | $gotos_array = explode(',', $gotos);
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| 153 |
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| 154 | $loop_c = 0;
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| 155 |
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| 156 | while (count($gotos_array) != 0 && $loop_c <= 20) {
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| 157 |
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| 158 | // Loop through all found gotos
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| 159 | foreach ($gotos_array as $index => &$goto) {
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| 160 | error_log("RCPT RESOVLER: http pipe: query " . $goto . " as username from mailbox" . PHP_EOL);
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| 161 | $stmt = $pdo->prepare("SELECT `username` FROM `mailbox` WHERE `username` = :goto AND (`active`= '1' OR `active`= '2');");
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| 162 | $stmt->execute(array(':goto' => $goto));
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| 163 | $username = $stmt->fetch(PDO::FETCH_ASSOC)['username'];
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| 164 | if (!empty($username)) {
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| 165 | error_log("RCPT RESOVLER: http pipe: mailbox found: " . $username . PHP_EOL);
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| 166 | // Current goto is a mailbox, save to rcpt_final_mailboxes if not a duplicate
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| 167 | if (!in_array($username, $rcpt_final_mailboxes)) {
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| 168 | $rcpt_final_mailboxes[] = $username;
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| 169 | }
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| 170 | }
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| 171 | else {
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| 172 | $parsed_goto = parse_email($goto);
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| 173 | if (!$redis->hGet('DOMAIN_MAP', $parsed_goto['domain'])) {
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| 174 | error_log("RCPT RESOVLER:" . $goto . " is not a mailcow handled mailbox or alias address" . PHP_EOL);
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| 175 | }
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| 176 | else {
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| 177 | $stmt = $pdo->prepare("SELECT `goto` FROM `alias` WHERE `address` = :goto AND `active` = '1'");
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| 178 | $stmt->execute(array(':goto' => $goto));
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| 179 | $goto_branch = $stmt->fetch(PDO::FETCH_ASSOC)['goto'];
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| 180 | if ($goto_branch) {
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| 181 | error_log("RCPT RESOVLER: http pipe: goto address " . $goto . " is an alias branch for " . $goto_branch . PHP_EOL);
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| 182 | $goto_branch_array = explode(',', $goto_branch);
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| 183 | } else {
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| 184 | $stmt = $pdo->prepare("SELECT `target_domain` FROM `alias_domain` WHERE `alias_domain` = :domain AND `active` AND '1'");
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| 185 | $stmt->execute(array(':domain' => $parsed_goto['domain']));
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| 186 | $goto_branch = $stmt->fetch(PDO::FETCH_ASSOC)['target_domain'];
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| 187 | if ($goto_branch) {
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| 188 | error_log("RCPT RESOVLER: http pipe: goto domain " . $parsed_goto['domain'] . " is a domain alias branch for " . $goto_branch . PHP_EOL);
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| 189 | $goto_branch_array = array($parsed_goto['local'] . '@' . $goto_branch);
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| 190 | }
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| 191 | }
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| 192 | }
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| 193 | }
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| 194 | // goto item was processed, unset
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| 195 | unset($gotos_array[$index]);
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| 196 | }
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| 197 |
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| 198 | // Merge goto branch array derived from previous loop (if any), filter duplicates and unset goto branch array
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| 199 | if (!empty($goto_branch_array)) {
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| 200 | $gotos_array = array_unique(array_merge($gotos_array, $goto_branch_array));
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| 201 | unset($goto_branch_array);
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| 202 | }
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| 203 |
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| 204 | // Reindex array
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| 205 | $gotos_array = array_values($gotos_array);
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| 206 |
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| 207 | // Force exit if loop cannot be solved
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| 208 | // Postfix does not allow for alias loops, so this should never happen.
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| 209 | $loop_c++;
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| 210 | error_log("RCPT RESOVLER: http pipe: goto array count on loop #". $loop_c . " is " . count($gotos_array) . PHP_EOL);
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| 211 | }
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| 212 | }
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| 213 | catch (PDOException $e) {
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| 214 | error_log("RCPT RESOVLER: " . $e->getMessage() . PHP_EOL);
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| 215 | http_response_code(502);
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| 216 | exit;
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| 217 | }
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| 218 | }
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| 219 |
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| 220 | foreach ($rcpt_final_mailboxes as $rcpt_final) {
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| 221 | error_log("QUARANTINE: quarantine pipe: processing quarantine message for rcpt " . $rcpt_final . PHP_EOL);
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| 222 | try {
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| 223 | $stmt = $pdo->prepare("INSERT INTO `quarantine` (`qid`, `subject`, `score`, `sender`, `rcpt`, `symbols`, `user`, `ip`, `msg`, `action`, `fuzzy_hashes`)
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| 224 | VALUES (:qid, :subject, :score, :sender, :rcpt, :symbols, :user, :ip, :msg, :action, :fuzzy_hashes)");
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| 225 | $stmt->execute(array(
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| 226 | ':qid' => $qid,
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| 227 | ':subject' => $subject,
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| 228 | ':score' => $score,
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| 229 | ':sender' => $sender,
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| 230 | ':rcpt' => $rcpt_final,
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| 231 | ':symbols' => $symbols,
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| 232 | ':user' => $user,
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| 233 | ':ip' => $ip,
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| 234 | ':msg' => $raw_data,
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| 235 | ':action' => $action,
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| 236 | ':fuzzy_hashes' => $fuzzy
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| 237 | ));
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| 238 | $stmt = $pdo->prepare('DELETE FROM `quarantine` WHERE `rcpt` = :rcpt AND `id` NOT IN (
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| 239 | SELECT `id`
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| 240 | FROM (
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| 241 | SELECT `id`
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| 242 | FROM `quarantine`
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| 243 | WHERE `rcpt` = :rcpt2
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| 244 | ORDER BY id DESC
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| 245 | LIMIT :retention_size
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| 246 | ) x
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| 247 | );');
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| 248 | $stmt->execute(array(
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| 249 | ':rcpt' => $rcpt_final,
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| 250 | ':rcpt2' => $rcpt_final,
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| 251 | ':retention_size' => $retention_size
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| 252 | ));
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| 253 | }
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| 254 | catch (PDOException $e) {
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| 255 | error_log("QUARANTINE: " . $e->getMessage() . PHP_EOL);
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| 256 | http_response_code(503);
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| 257 | exit;
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| 258 | }
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| 259 | }
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| 260 |
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