<?php
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;
use PHPMailer\PHPMailer\Exception;
function is_valid_regex($exp) {
  return @preg_match($exp, '') !== false;
}
function isset_has_content($var) {
  if (isset($var) && $var != "") {
    return true;
  }
  else {
    return false;
  }
}
function readable_random_string($length = 8) {
  $string = '';
  $vowels = array('a', 'e', 'i', 'o', 'u');
  $consonants = array('b', 'c', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'm', 'n', 'p', 'r', 's', 't', 'v', 'w', 'x', 'y', 'z');
  $max = $length / 2;
  for ($i = 1; $i <= $max; $i++) {
    $string .= $consonants[rand(0,19)];
    $string .= $vowels[rand(0,4)];
  }
  return $string;
}
// Validates ips and cidrs
function valid_network($network) {
  if (filter_var($network, FILTER_VALIDATE_IP)) {
    return true;
  }
  $parts = explode('/', $network);
  if (count($parts) != 2) {
    return false;
  }
  $ip = $parts[0];
  $netmask = $parts[1];
  if (!preg_match("/^\d+$/", $netmask)){
    return false;
  }
  $netmask = intval($parts[1]);
  if ($netmask < 0) {
    return false;
  }
  if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
    return $netmask <= 32;
  }
  if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
    return $netmask <= 128;
  }
  return false;
}
function valid_hostname($hostname) {
  return filter_var($hostname, FILTER_VALIDATE_DOMAIN, FILTER_FLAG_HOSTNAME);
}
// Thanks to https://stackoverflow.com/a/49373789
// Validates exact ip matches and ip-in-cidr, ipv4 and ipv6
function ip_acl($ip, $networks) {
  foreach($networks as $network) {
    if (filter_var($network, FILTER_VALIDATE_IP)) {
      if ($ip == $network) {
        return true;
      }
      else {
        continue;
      }
    }
    $ipb = inet_pton($ip);
    $iplen = strlen($ipb);
    if (strlen($ipb) < 4) {
      continue;
    }
    $ar = explode('/', $network);
    $ip1 = $ar[0];
    $ip1b = inet_pton($ip1);
    $ip1len = strlen($ip1b);
    if ($ip1len != $iplen) {
      continue;
    }
    if (count($ar)>1) {
      $bits=(int)($ar[1]);
    }
    else {
      $bits = $iplen * 8;
    }
    for ($c=0; $bits>0; $c++) {
      $bytemask = ($bits < 8) ? 0xff ^ ((1 << (8-$bits))-1) : 0xff;
      if (((ord($ipb[$c]) ^ ord($ip1b[$c])) & $bytemask) != 0) {
        continue 2;
      }
      $bits-=8;
    }
    return true;
  }
  return false;
}
function hash_password($password) {
  // default_pass_scheme is determined in vars.inc.php (or corresponding local file)
  // in case default pass scheme is not defined, falling back to BLF-CRYPT.
  global $default_pass_scheme;
  $pw_hash = NULL;
  // support pre-hashed passwords
  if (preg_match('/^{(ARGON2I|ARGON2ID|BLF-CRYPT|CLEAR|CLEARTEXT|CRYPT|DES-CRYPT|LDAP-MD5|MD5|MD5-CRYPT|PBKDF2|PLAIN|PLAIN-MD4|PLAIN-MD5|PLAIN-TRUNC|PLAIN-TRUNC|SHA|SHA1|SHA256|SHA256-CRYPT|SHA512|SHA512-CRYPT|SMD5|SSHA|SSHA256|SSHA512)}/i', $password)) {
    $pw_hash = $password;
  }
  else {
    switch (strtoupper($default_pass_scheme)) {
      case "SSHA":
        $salt_str = bin2hex(openssl_random_pseudo_bytes(8));
        $pw_hash = "{SSHA}".base64_encode(hash('sha1', $password . $salt_str, true) . $salt_str);
        break;
      case "SSHA256":
        $salt_str = bin2hex(openssl_random_pseudo_bytes(8));
        $pw_hash = "{SSHA256}".base64_encode(hash('sha256', $password . $salt_str, true) . $salt_str);
        break;
      case "SSHA512":
        $salt_str = bin2hex(openssl_random_pseudo_bytes(8));
        $pw_hash = "{SSHA512}".base64_encode(hash('sha512', $password . $salt_str, true) . $salt_str);
        break;
      case "BLF-CRYPT":
      default:
        $pw_hash = "{BLF-CRYPT}" . password_hash($password, PASSWORD_BCRYPT);
        break;
    }
  }
  return $pw_hash;
}
function password_complexity($_action, $_data = null) {
  global $redis;
  global $lang;
  switch ($_action) {
    case 'edit':
      if ($_SESSION['mailcow_cc_role'] != "admin") {
        $_SESSION['return'][] = array(
          'type' => 'danger',
          'log' => array(__FUNCTION__, $_action, $_data),
          'msg' => 'access_denied'
        );
        return false;
      }
      $is_now = password_complexity('get');
      if (!empty($is_now)) {
        $length = (isset($_data['length']) && intval($_data['length']) >= 3) ? intval($_data['length']) : $is_now['length'];
        $chars = (isset($_data['chars'])) ? intval($_data['chars']) : $is_now['chars'];
        $lowerupper = (isset($_data['lowerupper'])) ? intval($_data['lowerupper']) : $is_now['lowerupper'];
        $special_chars = (isset($_data['special_chars'])) ? intval($_data['special_chars']) : $is_now['special_chars'];
        $numbers = (isset($_data['numbers'])) ? intval($_data['numbers']) : $is_now['numbers'];
      }
      try {
        $redis->hMSet('PASSWD_POLICY', [
          'length' => $length,
          'chars' => $chars,
          'special_chars' => $special_chars,
          'lowerupper' => $lowerupper,
          'numbers' => $numbers
        ]);
      }
      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' => 'password_policy_saved'
      );
    break;
    case 'get':
      try {
        $length = $redis->hGet('PASSWD_POLICY', 'length');
        $chars = $redis->hGet('PASSWD_POLICY', 'chars');
        $special_chars = $redis->hGet('PASSWD_POLICY', 'special_chars');
        $lowerupper = $redis->hGet('PASSWD_POLICY', 'lowerupper');
        $numbers = $redis->hGet('PASSWD_POLICY', 'numbers');
        return array(
          'length' => $length,
          'chars' => $chars,
          'special_chars' => $special_chars,
          'lowerupper' => $lowerupper,
          'numbers' => $numbers
        );
      }
      catch (RedisException $e) {
        $_SESSION['return'][] = array(
          'type' => 'danger',
          'log' => array(__FUNCTION__, $_action, $_data),
          'msg' => array('redis_error', $e)
        );
        return false;
      }
      return false;
    break;
    case 'html':
      $policies = password_complexity('get');
      foreach ($policies as $name => $value) {
        if ($value != 0) {
          $policy_text[] = sprintf($lang['admin']["password_policy_$name"], $value);
        }
      }
      return '<p class="help-block small">- ' . implode('<br>- ', (array)$policy_text) . '</p>';
    break;
  }
}
function password_check($password1, $password2) {
  $password_complexity = password_complexity('get');

  if (empty($password1) || empty($password2)) {
    $_SESSION['return'][] = array(
      'type' => 'danger',
      'log' => array(__FUNCTION__, $_action, $_type),
      'msg' => 'password_complexity'
    );
    return false;
  }

  if ($password1 != $password2) {
    $_SESSION['return'][] = array(
      'type' => 'danger',
      'log' => array(__FUNCTION__, $_action, $_type),
      'msg' => 'password_mismatch'
    );
    return false;
  }

  $given_password['length'] = strlen($password1);
  $given_password['special_chars'] = preg_match('/[^a-zA-Z\d]/', $password1);
  $given_password['chars'] = preg_match('/[a-zA-Z]/',$password1);
  $given_password['numbers'] = preg_match('/\d/', $password1);
  $lower = strlen(preg_replace("/[^a-z]/", '', $password1));
  $upper = strlen(preg_replace("/[^A-Z]/", '', $password1));
  $given_password['lowerupper'] = ($lower > 0 && $upper > 0) ? true : false;

  if (
    ($given_password['length'] < $password_complexity['length']) ||
    ($password_complexity['special_chars'] == 1 && (intval($given_password['special_chars']) != $password_complexity['special_chars'])) ||
    ($password_complexity['chars'] == 1 && (intval($given_password['chars']) != $password_complexity['chars'])) ||
    ($password_complexity['numbers'] == 1 && (intval($given_password['numbers']) != $password_complexity['numbers'])) ||
    ($password_complexity['lowerupper'] == 1 && (intval($given_password['lowerupper']) != $password_complexity['lowerupper']))
  ) {
    $_SESSION['return'][] = array(
      'type' => 'danger',
      'log' => array(__FUNCTION__, $_action, $_type),
      'msg' => 'password_complexity'
    );
    return false;
  }

  return true;
}
function last_login($action, $username, $sasl_limit_days = 7, $ui_offset = 1) {
  global $pdo;
  global $redis;
  $sasl_limit_days = intval($sasl_limit_days);
  switch ($action) {
    case 'get':
      if (filter_var($username, FILTER_VALIDATE_EMAIL) && hasMailboxObjectAccess($_SESSION['mailcow_cc_username'], $_SESSION['mailcow_cc_role'], $username)) {
        $stmt = $pdo->prepare('SELECT `real_rip`, MAX(`datetime`) as `datetime`, `service`, `app_password`, MAX(`app_passwd`.`name`) as `app_password_name` FROM `sasl_log`
          LEFT OUTER JOIN `app_passwd` on `sasl_log`.`app_password` = `app_passwd`.`id`
          WHERE `username` = :username
            AND HOUR(TIMEDIFF(NOW(), `datetime`)) < :sasl_limit_days
              GROUP BY `real_rip`, `service`, `app_password`
              ORDER BY `datetime` DESC;');
        $stmt->execute(array(':username' => $username, ':sasl_limit_days' => ($sasl_limit_days * 24)));
        $sasl = $stmt->fetchAll(PDO::FETCH_ASSOC);
        foreach ($sasl as $k => $v) {
          if (!filter_var($sasl[$k]['real_rip'], FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
            $sasl[$k]['real_rip'] = 'Web/EAS/Internal (' . $sasl[$k]['real_rip'] . ')';
          }
          elseif (filter_var($sasl[$k]['real_rip'], FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
            try {
              $sasl[$k]['location'] = $redis->hGet('IP_SHORTCOUNTRY', $sasl[$k]['real_rip']);
            }
            catch (RedisException $e) {
              $_SESSION['return'][] = array(
                'type' => 'danger',
                'log' => array(__FUNCTION__, $_action, $_data_log),
                'msg' => array('redis_error', $e)
              );
              return false;
            }
            if (!$sasl[$k]['location']) {
              $curl = curl_init();
              curl_setopt($curl, CURLOPT_URL,"https://dfdata.bella.network/lookup/" . $sasl[$k]['real_rip']);
              curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
              curl_setopt($curl, CURLOPT_USERAGENT, 'Moocow');
              curl_setopt($curl, CURLOPT_TIMEOUT, 5);
              $ip_data = curl_exec($curl);
              if (!curl_errno($curl)) {
                $ip_data_array = json_decode($ip_data, true);
                if ($ip_data_array !== false and !empty($ip_data_array['location']['shortcountry'])) {
                  $sasl[$k]['location'] = $ip_data_array['location']['shortcountry'];
                    try {
                      $redis->hSet('IP_SHORTCOUNTRY', $sasl[$k]['real_rip'], $ip_data_array['location']['shortcountry']);
                    }
                    catch (RedisException $e) {
                      $_SESSION['return'][] = array(
                        'type' => 'danger',
                        'log' => array(__FUNCTION__, $_action, $_data_log),
                        'msg' => array('redis_error', $e)
                      );
                      curl_close($curl);
                      return false;
                    }
                }
              }
              curl_close($curl);
            }
          }
        }
      }
      else {
        $sasl = array();
      }
      if ($_SESSION['mailcow_cc_role'] == "admin" || $username == $_SESSION['mailcow_cc_username']) {
        $stmt = $pdo->prepare('SELECT `remote`, `time` FROM `logs`
          WHERE JSON_EXTRACT(`call`, "$[0]") = "check_login"
            AND JSON_EXTRACT(`call`, "$[1]") = :username
            AND `type` = "success" ORDER BY `time` DESC LIMIT 1 OFFSET :offset');
        $stmt->execute(array(
          ':username' => $username,
          ':offset' => $ui_offset
        ));
        $ui = $stmt->fetch(PDO::FETCH_ASSOC);
      }
      else {
        $ui = array();
      }

      return array('ui' => $ui, 'sasl' => $sasl);
    break;
    case 'reset':
      if (filter_var($username, FILTER_VALIDATE_EMAIL) && hasMailboxObjectAccess($_SESSION['mailcow_cc_username'], $_SESSION['mailcow_cc_role'], $username)) {
        $stmt = $pdo->prepare('DELETE FROM `sasl_log`
          WHERE `username` = :username');
        $stmt->execute(array(':username' => $username));
      }
      if ($_SESSION['mailcow_cc_role'] == "admin" || $username == $_SESSION['mailcow_cc_username']) {
        $stmt = $pdo->prepare('DELETE FROM `logs`
          WHERE JSON_EXTRACT(`call`, "$[0]") = "check_login"
            AND JSON_EXTRACT(`call`, "$[1]") = :username
            AND `type` = "success"');
        $stmt->execute(array(':username' => $username));
      }
      return true;
    break;
  }

}
function flush_memcached() {
  try {
    $m = new Memcached();
    $m->addServer('memcached', 11211);
    $m->flush();
  }
  catch ( Exception $e ) {
    // Dunno
  }
}
function sys_mail($_data) {
  if ($_SESSION['mailcow_cc_role'] != "admin") {
    $_SESSION['return'][] =  array(
      'type' => 'danger',
      'log' => array(__FUNCTION__),
      'msg' => 'access_denied'
    );
    return false;
  }
  $excludes = $_data['mass_exclude'];
  $includes = $_data['mass_include'];
  $mailboxes = array();
  $mass_from = $_data['mass_from'];
  $mass_text = $_data['mass_text'];
  $mass_html = $_data['mass_html'];
  $mass_subject = $_data['mass_subject'];
  if (!filter_var($mass_from, FILTER_VALIDATE_EMAIL)) {
    $_SESSION['return'][] =  array(
      'type' => 'danger',
      'log' => array(__FUNCTION__),
      'msg' => 'from_invalid'
    );
    return false;
  }
  if (empty($mass_subject)) {
    $_SESSION['return'][] =  array(
      'type' => 'danger',
      'log' => array(__FUNCTION__),
      'msg' => 'subject_empty'
    );
    return false;
  }
  if (empty($mass_text)) {
    $_SESSION['return'][] =  array(
      'type' => 'danger',
      'log' => array(__FUNCTION__),
      'msg' => 'text_empty'
    );
    return false;
  }
  $domains = array_merge(mailbox('get', 'domains'), mailbox('get', 'alias_domains'));
  foreach ($domains as $domain) {
    foreach (mailbox('get', 'mailboxes', $domain) as $mailbox) {
      $mailboxes[] = $mailbox;
    }
  }
  if (!empty($includes)) {
    $rcpts = array_intersect($mailboxes, $includes);
  }
  elseif (!empty($excludes)) {
    $rcpts = array_diff($mailboxes, $excludes);
  }
  else {
    $rcpts = $mailboxes;
  }
  if (!empty($rcpts)) {
    ini_set('max_execution_time', 0);
    ini_set('max_input_time', 0);
    $mail = new PHPMailer;
    $mail->Timeout = 10;
    $mail->SMTPOptions = array(
      'ssl' => array(
        'verify_peer' => false,
        'verify_peer_name' => false,
        'allow_self_signed' => true
      )
    );
    $mail->isSMTP();
    $mail->Host = 'dovecot-mailcow';
    $mail->SMTPAuth = false;
    $mail->Port = 24;
    $mail->setFrom($mass_from);
    $mail->Subject = $mass_subject;
    $mail->CharSet ="UTF-8";
    if (!empty($mass_html)) {
      $mail->Body = $mass_html;
      $mail->AltBody = $mass_text;
    }
    else {
      $mail->Body = $mass_text;
    }
    $mail->XMailer = 'MooMassMail';
    foreach ($rcpts as $rcpt) {
      $mail->AddAddress($rcpt);
      if (!$mail->send()) {
        $_SESSION['return'][] =  array(
          'type' => 'warning',
          'log' => array(__FUNCTION__),
          'msg' => 'Mailer error (RCPT "' . htmlspecialchars($rcpt) . '"): ' . str_replace('https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting', '', $mail->ErrorInfo)
        );
      }
      $mail->ClearAllRecipients();
    }
  }
  $_SESSION['return'][] =  array(
    'type' => 'success',
    'log' => array(__FUNCTION__),
    'msg' => 'Mass mail job completed, sent ' . count($rcpts) . ' mails'
  );
}
function logger($_data = false) {
  /*
  logger() will be called as last function
  To manually log a message, logger needs to be called like below.

  logger(array(
    'return' => array(
      array(
        'type' => 'danger',
        'log' => array(__FUNCTION__),
        'msg' => $err
      )
    )
  ));

  These messages will not be printed as alert box.
  To do so, push them to $_SESSION['return'] and do not call logger as they will be included automatically:

  $_SESSION['return'][] =  array(
    'type' => 'danger',
    'log' => array(__FUNCTION__, $user, '*'),
    'msg' => $err
  );
  */
  global $pdo;
  if (!$_data) {
    $_data = $_SESSION;
  }
  if (!empty($_data['return'])) {
    $task = substr(strtoupper(md5(uniqid(rand(), true))), 0, 6);
    foreach ($_data['return'] as $return) {
      $type = $return['type'];
      $msg = null;
      if (isset($return['msg'])) {
        $msg = json_encode($return['msg'], JSON_UNESCAPED_UNICODE);
      }
      $call = null;
      if (isset($return['log'])) {
        $call = json_encode($return['log'], JSON_UNESCAPED_UNICODE);
      }
      if (!empty($_SESSION["dual-login"]["username"])) {
        $user = $_SESSION["dual-login"]["username"] . ' => ' . $_SESSION['mailcow_cc_username'];
        $role = $_SESSION["dual-login"]["role"] . ' => ' . $_SESSION['mailcow_cc_role'];
      }
      elseif (!empty($_SESSION['mailcow_cc_username'])) {
        $user = $_SESSION['mailcow_cc_username'];
        $role = $_SESSION['mailcow_cc_role'];
      }
      else {
        $user = 'unauthenticated';
        $role = 'unauthenticated';
      }
      // We cannot log when logs is missing...
      try {
        $stmt = $pdo->prepare("INSERT INTO `logs` (`type`, `task`, `msg`, `call`, `user`, `role`, `remote`, `time`) VALUES
          (:type, :task, :msg, :call, :user, :role, :remote, UNIX_TIMESTAMP())");
        $stmt->execute(array(
          ':type' => $type,
          ':task' => $task,
          ':call' => $call,
          ':msg' => $msg,
          ':user' => $user,
          ':role' => $role,
          ':remote' => get_remote_ip()
        ));
      }
      catch (Exception $e) {
        // Do nothing
      }
    }
  }
  else {
    return true;
  }
}
function hasDomainAccess($username, $role, $domain) {
  global $pdo;
  if (!filter_var($username, FILTER_VALIDATE_EMAIL) && !ctype_alnum(str_replace(array('_', '.', '-'), '', $username))) {
    return false;
  }
  if (empty($domain) || !is_valid_domain_name($domain)) {
    return false;
  }
  if ($role != 'admin' && $role != 'domainadmin') {
    return false;
  }
  if ($role == 'admin') {
    $stmt = $pdo->prepare("SELECT `domain` FROM `domain`
      WHERE `domain` = :domain");
    $stmt->execute(array(':domain' => $domain));
    $num_results = count($stmt->fetchAll(PDO::FETCH_ASSOC));
    $stmt = $pdo->prepare("SELECT `alias_domain` FROM `alias_domain`
      WHERE `alias_domain` = :domain");
    $stmt->execute(array(':domain' => $domain));
    $num_results = $num_results + count($stmt->fetchAll(PDO::FETCH_ASSOC));
    if ($num_results != 0) {
      return true;
    }
  }
  elseif ($role == 'domainadmin') {
    $stmt = $pdo->prepare("SELECT `domain` FROM `domain_admins`
    WHERE (
      `active`='1'
      AND `username` = :username
      AND (`domain` = :domain1 OR `domain` = (SELECT `target_domain` FROM `alias_domain` WHERE `alias_domain` = :domain2))
    )");
    $stmt->execute(array(':username' => $username, ':domain1' => $domain, ':domain2' => $domain));
    $num_results = count($stmt->fetchAll(PDO::FETCH_ASSOC));
    if (!empty($num_results)) {
      return true;
    }
  }
  return false;
}
function hasMailboxObjectAccess($username, $role, $object) {
  global $pdo;
  if (empty($username) || empty($role) || empty($object)) {
    return false;
  }
  if (!filter_var(html_entity_decode(rawurldecode($username)), FILTER_VALIDATE_EMAIL) && !ctype_alnum(str_replace(array('_', '.', '-'), '', $username))) {
    return false;
  }
  if ($role != 'admin' && $role != 'domainadmin' && $role != 'user') {
    return false;
  }
  if ($username == $object) {
    return true;
  }
  $stmt = $pdo->prepare("SELECT `domain` FROM `mailbox` WHERE `username` = :object");
  $stmt->execute(array(':object' => $object));
  $row = $stmt->fetch(PDO::FETCH_ASSOC);
  if (isset($row['domain']) && hasDomainAccess($username, $role, $row['domain'])) {
    return true;
  }
  return false;
}
// does also verify mailboxes as a mailbox is a alias == goto
function hasAliasObjectAccess($username, $role, $object) {
  global $pdo;
  if (empty($username) || empty($role) || empty($object)) {
    return false;
  }
  if (!filter_var(html_entity_decode(rawurldecode($username)), FILTER_VALIDATE_EMAIL) && !ctype_alnum(str_replace(array('_', '.', '-'), '', $username))) {
    return false;
  }
  if ($role != 'admin' && $role != 'domainadmin' && $role != 'user') {
    return false;
  }
  $stmt = $pdo->prepare("SELECT `domain` FROM `alias` WHERE `address` = :object");
  $stmt->execute(array(':object' => $object));
  $row = $stmt->fetch(PDO::FETCH_ASSOC);
  if (isset($row['domain']) && hasDomainAccess($username, $role, $row['domain'])) {
    return true;
  }
  return false;
}
function pem_to_der($pem_key) {
  // Need to remove BEGIN/END PUBLIC KEY
  $lines = explode("\n", trim($pem_key));
  unset($lines[count($lines)-1]);
  unset($lines[0]);
  return base64_decode(implode('', $lines));
}
function expand_ipv6($ip) {
  $hex = unpack("H*hex", inet_pton($ip));
  $ip = substr(preg_replace("/([A-f0-9]{4})/", "$1:", $hex['hex']), 0, -1);
  return $ip;
}
function generate_tlsa_digest($hostname, $port, $starttls = null) {
  if (!is_valid_domain_name($hostname)) {
    return "Not a valid hostname";
  }
  if (empty($starttls)) {
    $context = stream_context_create(array("ssl" => array("capture_peer_cert" => true, 'verify_peer' => false, 'verify_peer_name' => false, 'allow_self_signed' => true)));
    $stream = stream_socket_client('ssl://' . $hostname . ':' . $port, $error_nr, $error_msg, 5, STREAM_CLIENT_CONNECT, $context);
    if (!$stream) {
      $error_msg = isset($error_msg) ? $error_msg : '-';
      return $error_nr . ': ' . $error_msg;
    }
  }
  else {
    $stream = stream_socket_client('tcp://' . $hostname . ':' . $port, $error_nr, $error_msg, 5);
    if (!$stream) {
      return $error_nr . ': ' . $error_msg;
    }
    $banner = fread($stream, 512 );
    if (preg_match("/^220/i", $banner)) { // SMTP
      fwrite($stream,"HELO tlsa.generator.local\r\n");
      fread($stream, 512);
      fwrite($stream,"STARTTLS\r\n");
      fread($stream, 512);
    }
    elseif (preg_match("/imap.+starttls/i", $banner)) { // IMAP
      fwrite($stream,"A1 STARTTLS\r\n");
      fread($stream, 512);
    }
    elseif (preg_match("/^\+OK/", $banner)) { // POP3
      fwrite($stream,"STLS\r\n");
      fread($stream, 512);
    }
    elseif (preg_match("/^OK/m", $banner)) { // Sieve
      fwrite($stream,"STARTTLS\r\n");
      fread($stream, 512);
    }
    else {
      return 'Unknown banner: "' . htmlspecialchars(trim($banner)) . '"';
    }
    // Upgrade connection
    stream_set_blocking($stream, true);
    stream_context_set_option($stream, 'ssl', 'capture_peer_cert', true);
    stream_context_set_option($stream, 'ssl', 'verify_peer', false);
    stream_context_set_option($stream, 'ssl', 'verify_peer_name', false);
    stream_context_set_option($stream, 'ssl', 'allow_self_signed', true);
    stream_socket_enable_crypto($stream, true, STREAM_CRYPTO_METHOD_ANY_CLIENT);
    stream_set_blocking($stream, false);
  }
  $params = stream_context_get_params($stream);
  if (!empty($params['options']['ssl']['peer_certificate'])) {
    $key_resource = openssl_pkey_get_public($params['options']['ssl']['peer_certificate']);
    // We cannot get ['rsa']['n'], the binary data would contain BEGIN/END PUBLIC KEY
    $key_data = openssl_pkey_get_details($key_resource)['key'];
    return '3 1 1 ' . openssl_digest(pem_to_der($key_data), 'sha256');
  }
  else {
    return 'Error: Cannot read peer certificate';
  }
}
function alertbox_log_parser($_data) {
  global $lang;
  if (isset($_data['return'])) {
    foreach ($_data['return'] as $return) {
      // Get type
      $type = $return['type'];
      // If a lang[type][msg] string exists, use it as message
      if (isset($return['type']) && isset($return['msg']) && !is_array($return['msg'])) {
        if (isset($lang[$return['type']][$return['msg']])) {
          $msg = $lang[$return['type']][$return['msg']];
        }
        else {
          $msg = $return['msg'];
        }
      }
      // If msg is an array, use first element as language string and run printf on it with remaining array elements
      elseif (is_array($return['msg'])) {
        $msg = array_shift($return['msg']);
        $msg = vsprintf(
          $lang[$return['type']][$msg],
          $return['msg']
        );
      }
      else {
        $msg = '-';
      }
      $log_array[] = array('msg' => $msg, 'type' => json_encode($type));
    }
    if (!empty($log_array)) {
      return $log_array;
    }
  }
  return false;
}
function verify_salted_hash($hash, $password, $algo, $salt_length) {
  // Decode hash
  $dhash = base64_decode($hash);
  // Get first n bytes of binary which equals a SSHA hash
  $ohash = substr($dhash, 0, $salt_length);
  // Remove SSHA hash from decoded hash to get original salt string
  $osalt = str_replace($ohash, '', $dhash);
  // Check single salted SSHA hash against extracted hash
  if (hash_equals(hash($algo, $password . $osalt, true), $ohash)) {
    return true;
  }
  return false;
}
function verify_hash($hash, $password) {
  if (preg_match('/^{(.+)}(.+)/i', $hash, $hash_array)) {
    $scheme = strtoupper($hash_array[1]);
    $hash = $hash_array[2];
    switch ($scheme) {
      case "ARGON2I":
      case "ARGON2ID":
      case "BLF-CRYPT":
      case "CRYPT":
      case "DES-CRYPT":
      case "MD5-CRYPT":
      case "MD5":
      case "SHA256-CRYPT":
      case "SHA512-CRYPT":
        return password_verify($password, $hash);

      case "CLEAR":
      case "CLEARTEXT":
      case "PLAIN":
        return $password == $hash;

      case "LDAP-MD5":
        $hash = base64_decode($hash);
        return hash_equals(hash('md5', $password, true), $hash);

      case "PBKDF2":
        $components = explode('$', $hash);
        $salt = $components[2];
        $rounds = $components[3];
        $hash = $components[4];
        return hash_equals(hash_pbkdf2('sha1', $password, $salt, $rounds), $hash);

      case "PLAIN-MD4":
        return hash_equals(hash('md4', $password), $hash);

      case "PLAIN-MD5":
        return md5($password) == $hash;

      case "PLAIN-TRUNC":
        $components = explode('-', $hash);
        if (count($components) > 1) {
          $trunc_len = $components[0];
          $trunc_password = $components[1];

          return substr($password, 0, $trunc_len) == $trunc_password;
        } else {
          return $password == $hash;
        }

      case "SHA":
      case "SHA1":
      case "SHA256":
      case "SHA512":
        // SHA is an alias for SHA1
        $scheme = $scheme == "SHA" ? "sha1" : strtolower($scheme);
        $hash = base64_decode($hash);
        return hash_equals(hash($scheme, $password, true), $hash);

      case "SMD5":
        return verify_salted_hash($hash, $password, 'md5', 16);

      case "SSHA":
        return verify_salted_hash($hash, $password, 'sha1', 20);

      case "SSHA256":
        return verify_salted_hash($hash, $password, 'sha256', 32);

      case "SSHA512":
        return verify_salted_hash($hash, $password, 'sha512', 64);

      default:
        return false;
    }
  }
  return false;
}
function check_login($user, $pass, $app_passwd_data = false) {
  global $pdo;
  global $redis;
  global $imap_server;

  if (!filter_var($user, FILTER_VALIDATE_EMAIL) && !ctype_alnum(str_replace(array('_', '.', '-'), '', $user))) {
    $_SESSION['return'][] =  array(
      'type' => 'danger',
      'log' => array(__FUNCTION__, $user, '*'),
      'msg' => 'malformed_username'
    );
    return false;
  }

  // Validate admin
  $user = strtolower(trim($user));
  $stmt = $pdo->prepare("SELECT `password` FROM `admin`
      WHERE `superadmin` = '1'
      AND `active` = '1'
      AND `username` = :user");
  $stmt->execute(array(':user' => $user));
  $rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
  foreach ($rows as $row) {
    // verify password
    if (verify_hash($row['password'], $pass)) {
      // check for tfa authenticators
      $authenticators = get_tfa($user);
      if (isset($authenticators['additional']) && is_array($authenticators['additional']) && count($authenticators['additional']) > 0) {
        // active tfa authenticators found, set pending user login
        $_SESSION['pending_mailcow_cc_username'] = $user;
        $_SESSION['pending_mailcow_cc_role'] = "admin";
        $_SESSION['pending_tfa_methods'] = $authenticators['additional'];
        unset($_SESSION['ldelay']);
        $_SESSION['return'][] =  array(
          'type' => 'info',
          'log' => array(__FUNCTION__, $user, '*'),
          'msg' => 'awaiting_tfa_confirmation'
        );
        return "pending";
      } else {
        unset($_SESSION['ldelay']);
        // Reactivate TFA if it was set to "deactivate TFA for next login"
        $stmt = $pdo->prepare("UPDATE `tfa` SET `active`='1' WHERE `username` = :user");
        $stmt->execute(array(':user' => $user));
        $_SESSION['return'][] =  array(
          'type' => 'success',
          'log' => array(__FUNCTION__, $user, '*'),
          'msg' => array('logged_in_as', $user)
        );
        return "admin";
      }
    }
  }

  // Validate domain admin
  $stmt = $pdo->prepare("SELECT `password` FROM `admin`
      WHERE `superadmin` = '0'
      AND `active`='1'
      AND `username` = :user");
  $stmt->execute(array(':user' => $user));
  $rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
  foreach ($rows as $row) {
    // verify password
    if (verify_hash($row['password'], $pass) !== false) {
      // check for tfa authenticators
      $authenticators = get_tfa($user);
      if (isset($authenticators['additional']) && is_array($authenticators['additional']) && count($authenticators['additional']) > 0) {
        $_SESSION['pending_mailcow_cc_username'] = $user;
        $_SESSION['pending_mailcow_cc_role'] = "domainadmin";
        $_SESSION['pending_tfa_methods'] = $authenticators['additional'];
        unset($_SESSION['ldelay']);
        $_SESSION['return'][] =  array(
          'type' => 'info',
          'log' => array(__FUNCTION__, $user, '*'),
          'msg' => 'awaiting_tfa_confirmation'
        );
        return "pending";
      }
      else {
        unset($_SESSION['ldelay']);
        // Reactivate TFA if it was set to "deactivate TFA for next login"
        $stmt = $pdo->prepare("UPDATE `tfa` SET `active`='1' WHERE `username` = :user");
        $stmt->execute(array(':user' => $user));
        $_SESSION['return'][] =  array(
          'type' => 'success',
          'log' => array(__FUNCTION__, $user, '*'),
          'msg' => array('logged_in_as', $user)
        );
        return "domainadmin";
      }
    }
  }

  // Validate mailbox user
  $stmt = $pdo->prepare("SELECT `password` FROM `mailbox`
      INNER JOIN domain on mailbox.domain = domain.domain
      WHERE `kind` NOT REGEXP 'location|thing|group'
        AND `mailbox`.`active`='1'
        AND `domain`.`active`='1'
        AND `username` = :user");
  $stmt->execute(array(':user' => $user));
  $rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
  if ($app_passwd_data['eas'] === true) {
    $stmt = $pdo->prepare("SELECT `app_passwd`.`password` as `password`, `app_passwd`.`id` as `app_passwd_id` FROM `app_passwd`
        INNER JOIN `mailbox` ON `mailbox`.`username` = `app_passwd`.`mailbox`
        INNER JOIN `domain` ON `mailbox`.`domain` = `domain`.`domain`
        WHERE `mailbox`.`kind` NOT REGEXP 'location|thing|group'
          AND `mailbox`.`active` = '1'
          AND `domain`.`active` = '1'
          AND `app_passwd`.`active` = '1'
          AND `app_passwd`.`eas_access` = '1'
          AND `app_passwd`.`mailbox` = :user");
    $stmt->execute(array(':user' => $user));
    $rows = array_merge($rows, $stmt->fetchAll(PDO::FETCH_ASSOC));
  }
  elseif ($app_passwd_data['dav'] === true) {
    $stmt = $pdo->prepare("SELECT `app_passwd`.`password` as `password`, `app_passwd`.`id` as `app_passwd_id` FROM `app_passwd`
        INNER JOIN `mailbox` ON `mailbox`.`username` = `app_passwd`.`mailbox`
        INNER JOIN `domain` ON `mailbox`.`domain` = `domain`.`domain`
        WHERE `mailbox`.`kind` NOT REGEXP 'location|thing|group'
          AND `mailbox`.`active` = '1'
          AND `domain`.`active` = '1'
          AND `app_passwd`.`active` = '1'
          AND `app_passwd`.`dav_access` = '1'
          AND `app_passwd`.`mailbox` = :user");
    $stmt->execute(array(':user' => $user));
    $rows = array_merge($rows, $stmt->fetchAll(PDO::FETCH_ASSOC));
  }
  foreach ($rows as $row) { 
    // verify password
    if (verify_hash($row['password'], $pass) !== false) {
      if (!array_key_exists("app_passwd_id", $row)){ 
        // password is not a app password
        // check for tfa authenticators
        $authenticators = get_tfa($user);
        if (isset($authenticators['additional']) && is_array($authenticators['additional']) && count($authenticators['additional']) > 0 &&
            $app_passwd_data['eas'] !== true && $app_passwd_data['dav'] !== true) {
          // authenticators found, init TFA flow
          $_SESSION['pending_mailcow_cc_username'] = $user;
          $_SESSION['pending_mailcow_cc_role'] = "user";
          $_SESSION['pending_tfa_methods'] = $authenticators['additional'];
          unset($_SESSION['ldelay']);
          $_SESSION['return'][] =  array(
            'type' => 'success',
            'log' => array(__FUNCTION__, $user, '*'),
            'msg' => array('logged_in_as', $user)
          );
          return "pending";
        } else if (!isset($authenticators['additional']) || !is_array($authenticators['additional']) || count($authenticators['additional']) == 0) {
          // no authenticators found, login successfull
          // Reactivate TFA if it was set to "deactivate TFA for next login"
          $stmt = $pdo->prepare("UPDATE `tfa` SET `active`='1' WHERE `username` = :user");
          $stmt->execute(array(':user' => $user));

          unset($_SESSION['ldelay']);
          return "user";
        }
      } elseif ($app_passwd_data['eas'] === true || $app_passwd_data['dav'] === true) {
        // password is a app password
        $service = ($app_passwd_data['eas'] === true) ? 'EAS' : 'DAV';
        $stmt = $pdo->prepare("REPLACE INTO sasl_log (`service`, `app_password`, `username`, `real_rip`) VALUES (:service, :app_id, :username, :remote_addr)");
        $stmt->execute(array(
          ':service' => $service,
          ':app_id' => $row['app_passwd_id'],
          ':username' => $user,
          ':remote_addr' => ($_SERVER['HTTP_X_REAL_IP'] ?? $_SERVER['REMOTE_ADDR'])
        ));

        unset($_SESSION['ldelay']);
        return "user";
      }
    }
  }

  if (!isset($_SESSION['ldelay'])) {
    $_SESSION['ldelay'] = "0";
    $redis->publish("F2B_CHANNEL", "mailcow UI: Invalid password for " . $user . " by " . $_SERVER['REMOTE_ADDR']);
    error_log("mailcow UI: Invalid password for " . $user . " by " . $_SERVER['REMOTE_ADDR']);
  }
  elseif (!isset($_SESSION['mailcow_cc_username'])) {
    $_SESSION['ldelay'] = $_SESSION['ldelay']+0.5;
    $redis->publish("F2B_CHANNEL", "mailcow UI: Invalid password for " . $user . " by " . $_SERVER['REMOTE_ADDR']);
    error_log("mailcow UI: Invalid password for " . $user . " by " . $_SERVER['REMOTE_ADDR']);
  }

  $_SESSION['return'][] =  array(
    'type' => 'danger',
    'log' => array(__FUNCTION__, $user, '*'),
    'msg' => 'login_failed'
  );

  sleep($_SESSION['ldelay']);
  return false;
}
function formatBytes($size, $precision = 2) {
  if(!is_numeric($size)) {
    return "0";
  }
  $base = log($size, 1024);
  $suffixes = array(' Byte', ' KiB', ' MiB', ' GiB', ' TiB');
  if ($size == "0") {
    return "0";
  }
  return round(pow(1024, $base - floor($base)), $precision) . $suffixes[floor($base)];
}
function update_sogo_static_view($mailbox = null) {
  if (getenv('SKIP_SOGO') == "y") {
    return true;
  }
  global $pdo;
  global $lang;

  $mailbox_exists = false;
  if ($mailbox !== null) {
    // Check if the mailbox exists
    $stmt = $pdo->prepare("SELECT username FROM mailbox WHERE username = :mailbox AND active = '1'");
    $stmt->execute(array(':mailbox' => $mailbox));
    $row = $stmt->fetch(PDO::FETCH_ASSOC);  
    if ($row){
      $mailbox_exists = true;
    }
  }

  $query = "REPLACE INTO _sogo_static_view (`c_uid`, `domain`, `c_name`, `c_password`, `c_cn`, `mail`, `aliases`, `ad_aliases`, `ext_acl`, `kind`, `multiple_bookings`)
            SELECT
              mailbox.username,
              mailbox.domain,
              mailbox.username,
              IF(JSON_UNQUOTE(JSON_VALUE(attributes, '$.force_pw_update')) = '0',
                 IF(JSON_UNQUOTE(JSON_VALUE(attributes, '$.sogo_access')) = 1, password, '{SSHA256}A123A123A321A321A321B321B321B123B123B321B432F123E321123123321321'),
                 '{SSHA256}A123A123A321A321A321B321B321B123B123B321B432F123E321123123321321'),
              mailbox.name,
              mailbox.username,
              IFNULL(GROUP_CONCAT(ga.aliases ORDER BY ga.aliases SEPARATOR ' '), ''),
              IFNULL(gda.ad_alias, ''),
              IFNULL(external_acl.send_as_acl, ''),
              mailbox.kind,
              mailbox.multiple_bookings
            FROM
              mailbox
              LEFT OUTER JOIN grouped_mail_aliases ga ON ga.username REGEXP CONCAT('(^|,)', mailbox.username, '($|,)')
              LEFT OUTER JOIN grouped_domain_alias_address gda ON gda.username = mailbox.username
              LEFT OUTER JOIN grouped_sender_acl_external external_acl ON external_acl.username = mailbox.username
            WHERE
              mailbox.active = '1'";
  
  if ($mailbox_exists) {
    $query .= " AND mailbox.username = :mailbox";
    $stmt = $pdo->prepare($query);
    $stmt->execute(array(':mailbox' => $mailbox));
  } else {
    $query .= " GROUP BY mailbox.username";
    $stmt = $pdo->query($query);
  }
  
  $stmt = $pdo->query("DELETE FROM _sogo_static_view WHERE `c_uid` NOT IN (SELECT `username` FROM `mailbox` WHERE `active` = '1');");
  
  flush_memcached();
}
function edit_user_account($_data) {
  global $lang;
  global $pdo;
  $_data_log = $_data;
  !isset($_data_log['user_new_pass']) ?: $_data_log['user_new_pass'] = '*';
  !isset($_data_log['user_new_pass2']) ?: $_data_log['user_new_pass2'] = '*';
  !isset($_data_log['user_old_pass']) ?: $_data_log['user_old_pass'] = '*';
  $username = $_SESSION['mailcow_cc_username'];
  $role = $_SESSION['mailcow_cc_role'];
  $password_old = $_data['user_old_pass'];
  if (filter_var($username, FILTER_VALIDATE_EMAIL === false) || $role != 'user') {
    $_SESSION['return'][] =  array(
      'type' => 'danger',
      'log' => array(__FUNCTION__, $_data_log),
      'msg' => 'access_denied'
    );
    return false;
  }
  $stmt = $pdo->prepare("SELECT `password` FROM `mailbox`
      WHERE `kind` NOT REGEXP 'location|thing|group'
        AND `username` = :user");
  $stmt->execute(array(':user' => $username));
  $row = $stmt->fetch(PDO::FETCH_ASSOC);
  if (!verify_hash($row['password'], $password_old)) {
    $_SESSION['return'][] =  array(
      'type' => 'danger',
      'log' => array(__FUNCTION__, $_data_log),
      'msg' => 'access_denied'
    );
    return false;
  }
  if (!empty($_data['user_new_pass']) && !empty($_data['user_new_pass2'])) {
    $password_new = $_data['user_new_pass'];
    $password_new2  = $_data['user_new_pass2'];
    if (password_check($password_new, $password_new2) !== true) {
      return false;
    }
    $password_hashed = hash_password($password_new);
    $stmt = $pdo->prepare("UPDATE `mailbox` SET `password` = :password_hashed,
      `attributes` = JSON_SET(`attributes`, '$.force_pw_update', '0'),
      `attributes` = JSON_SET(`attributes`, '$.passwd_update', NOW())
        WHERE `username` = :username");
    $stmt->execute(array(
      ':password_hashed' => $password_hashed,
      ':username' => $username
    ));
  }
  update_sogo_static_view();
  $_SESSION['return'][] =  array(
    'type' => 'success',
    'log' => array(__FUNCTION__, $_data_log),
    'msg' => array('mailbox_modified', htmlspecialchars($username))
  );
}
function user_get_alias_details($username) {
  global $pdo;
  global $lang;
  $data['direct_aliases'] = array();
  $data['shared_aliases'] = array();
  if ($_SESSION['mailcow_cc_role'] == "user") {
    $username = $_SESSION['mailcow_cc_username'];
  }
  if (!filter_var($username, FILTER_VALIDATE_EMAIL)) {
    return false;
  }
  if (!hasMailboxObjectAccess($username, $_SESSION['mailcow_cc_role'], $username)) {
    return false;
  }
  $data['address'] = $username;
  $stmt = $pdo->prepare("SELECT `address` AS `shared_aliases`, `public_comment` FROM `alias`
    WHERE `goto` REGEXP :username_goto
    AND `address` NOT LIKE '@%'
    AND `goto` != :username_goto2
    AND `address` != :username_address");
  $stmt->execute(array(
    ':username_goto' => '(^|,)'.$username.'($|,)',
    ':username_goto2' => $username,
    ':username_address' => $username
    ));
  $run = $stmt->fetchAll(PDO::FETCH_ASSOC);
  while ($row = array_shift($run)) {
    $data['shared_aliases'][$row['shared_aliases']]['public_comment'] = htmlspecialchars($row['public_comment']);
    //$data['shared_aliases'][] = $row['shared_aliases'];
  }

  $stmt = $pdo->prepare("SELECT `address` AS `direct_aliases`, `public_comment` FROM `alias`
    WHERE `goto` = :username_goto
    AND `address` NOT LIKE '@%'
    AND `address` != :username_address");
  $stmt->execute(
    array(
    ':username_goto' => $username,
    ':username_address' => $username
  ));
  $run = $stmt->fetchAll(PDO::FETCH_ASSOC);
  while ($row = array_shift($run)) {
    $data['direct_aliases'][$row['direct_aliases']]['public_comment'] = htmlspecialchars($row['public_comment']);
  }
  $stmt = $pdo->prepare("SELECT CONCAT(local_part, '@', alias_domain) AS `ad_alias`, `alias_domain` FROM `mailbox`
    LEFT OUTER JOIN `alias_domain` on `target_domain` = `domain`
      WHERE `username` = :username ;");
  $stmt->execute(array(':username' => $username));
  $run = $stmt->fetchAll(PDO::FETCH_ASSOC);
  while ($row = array_shift($run)) {
    if (empty($row['ad_alias'])) {
      continue;
    }
    $data['direct_aliases'][$row['ad_alias']]['public_comment'] = $lang['add']['alias_domain'];
    $data['alias_domains'][] = $row['alias_domain'];
  }
  $stmt = $pdo->prepare("SELECT IFNULL(GROUP_CONCAT(`send_as` SEPARATOR ', '), '') AS `send_as` FROM `sender_acl` WHERE `logged_in_as` = :username AND `send_as` NOT LIKE '@%';");
  $stmt->execute(array(':username' => $username));
  $run = $stmt->fetchAll(PDO::FETCH_ASSOC);
  while ($row = array_shift($run)) {
    $data['aliases_also_send_as'] = $row['send_as'];
  }
  $stmt = $pdo->prepare("SELECT CONCAT_WS(', ', IFNULL(GROUP_CONCAT(DISTINCT `send_as` SEPARATOR ', '), ''), GROUP_CONCAT(DISTINCT CONCAT('@',`alias_domain`) SEPARATOR ', ')) AS `send_as` FROM `sender_acl` LEFT JOIN `alias_domain` ON `alias_domain`.`target_domain` =  TRIM(LEADING '@' FROM `send_as`) WHERE `logged_in_as` = :username AND `send_as` LIKE '@%';");
  $stmt->execute(array(':username' => $username));
  $run = $stmt->fetchAll(PDO::FETCH_ASSOC);
  while ($row = array_shift($run)) {
    $data['aliases_send_as_all'] = $row['send_as'];
  }
  $stmt = $pdo->prepare("SELECT IFNULL(GROUP_CONCAT(`address` SEPARATOR ', '), '') as `address` FROM `alias` WHERE `goto` REGEXP :username AND `address` LIKE '@%';");
  $stmt->execute(array(':username' => '(^|,)'.$username.'($|,)'));
  $run = $stmt->fetchAll(PDO::FETCH_ASSOC);
  while ($row = array_shift($run)) {
    $data['is_catch_all'] = $row['address'];
  }
  return $data;
}
function is_valid_domain_name($domain_name) {
  if (empty($domain_name)) {
    return false;
  }
  $domain_name = idn_to_ascii($domain_name, 0, INTL_IDNA_VARIANT_UTS46);
  return (preg_match("/^([a-z\d](-*[a-z\d])*)(\.([a-z\d](-*[a-z\d])*))*$/i", $domain_name)
       && preg_match("/^.{1,253}$/", $domain_name)
       && preg_match("/^[^\.]{1,63}(\.[^\.]{1,63})*$/", $domain_name));
}
function set_tfa($_data) {
  global $pdo;
  global $yubi;
  global $tfa;
  $_data_log = $_data;
  $access_denied = null;
  !isset($_data_log['confirm_password']) ?: $_data_log['confirm_password'] = '*';
  $username = $_SESSION['mailcow_cc_username'];

  // check for empty user and role
  if (!isset($_SESSION['mailcow_cc_role']) || empty($username)) $access_denied = true;

  // check admin confirm password
  if ($access_denied === null) {
    $stmt = $pdo->prepare("SELECT `password` FROM `admin`
        WHERE `username` = :username");
    $stmt->execute(array(':username' => $username));
    $row = $stmt->fetch(PDO::FETCH_ASSOC);
    if ($row) {
      if (!verify_hash($row['password'], $_data["confirm_password"])) $access_denied = true;
      else $access_denied = false;
    }
  }

  // check mailbox confirm password
  if ($access_denied === null) {
    $stmt = $pdo->prepare("SELECT `password` FROM `mailbox`
        WHERE `username` = :username");
    $stmt->execute(array(':username' => $username));
    $row = $stmt->fetch(PDO::FETCH_ASSOC);
    if ($row) {
      if (!verify_hash($row['password'], $_data["confirm_password"])) $access_denied = true;
      else $access_denied = false;
    }
  }

  // set access_denied error
  if ($access_denied){
    $_SESSION['return'][] =  array(
      'type' => 'danger',
      'log' => array(__FUNCTION__, $_data_log),
      'msg' => 'access_denied'
    );
    return false;
  }

  switch ($_data["tfa_method"]) {
    case "yubi_otp":
      $key_id = (!isset($_data["key_id"])) ? 'unidentified' : $_data["key_id"];
      $yubico_id = $_data['yubico_id'];
      $yubico_key = $_data['yubico_key'];
      $yubi = new Auth_Yubico($yubico_id, $yubico_key);
      if (!$yubi) {
        $_SESSION['return'][] =  array(
          'type' => 'danger',
          'log' => array(__FUNCTION__, $_data_log),
          'msg' => 'access_denied'
        );
        return false;
      }
      if (!ctype_alnum($_data["otp_token"]) || strlen($_data["otp_token"]) != 44) {
        $_SESSION['return'][] =  array(
          'type' => 'danger',
          'log' => array(__FUNCTION__, $_data_log),
          'msg' => 'tfa_token_invalid'
        );
        return false;
      }
      $yauth = $yubi->verify($_data["otp_token"]);
      if (PEAR::isError($yauth)) {
        $_SESSION['return'][] =  array(
          'type' => 'danger',
          'log' => array(__FUNCTION__, $_data_log),
          'msg' => array('yotp_verification_failed', $yauth->getMessage())
        );
        return false;
      }
      try {
        // We could also do a modhex translation here
        $yubico_modhex_id = substr($_data["otp_token"], 0, 12);
        $stmt = $pdo->prepare("DELETE FROM `tfa`
          WHERE `username` = :username
            AND (`authmech` = 'yubi_otp' AND `secret` LIKE :modhex)");
        $stmt->execute(array(':username' => $username, ':modhex' => '%' . $yubico_modhex_id));
        $stmt = $pdo->prepare("INSERT INTO `tfa` (`key_id`, `username`, `authmech`, `active`, `secret`) VALUES
          (:key_id, :username, 'yubi_otp', '1', :secret)");
        $stmt->execute(array(':key_id' => $key_id, ':username' => $username, ':secret' => $yubico_id . ':' . $yubico_key . ':' . $yubico_modhex_id));
      }
      catch (PDOException $e) {
        $_SESSION['return'][] =  array(
          'type' => 'danger',
          'log' => array(__FUNCTION__, $_data_log),
          'msg' => array('mysql_error', $e)
        );
        return false;
      }
      $_SESSION['return'][] =  array(
        'type' => 'success',
        'log' => array(__FUNCTION__, $_data_log),
        'msg' => array('object_modified', htmlspecialchars($username))
      );
    break;
    case "totp":
      $key_id = (!isset($_data["key_id"])) ? 'unidentified' : $_data["key_id"];
      if ($tfa->verifyCode($_POST['totp_secret'], $_POST['totp_confirm_token']) === true) {
        //$stmt = $pdo->prepare("DELETE FROM `tfa` WHERE `username` = :username");
        //$stmt->execute(array(':username' => $username));
        $stmt = $pdo->prepare("INSERT INTO `tfa` (`username`, `key_id`, `authmech`, `secret`, `active`) VALUES (?, ?, 'totp', ?, '1')");
        $stmt->execute(array($username, $key_id, $_POST['totp_secret']));
        $_SESSION['return'][] =  array(
          'type' => 'success',
          'log' => array(__FUNCTION__, $_data_log),
          'msg' => array('object_modified', $username)
        );
      }
      else {
        $_SESSION['return'][] =  array(
          'type' => 'danger',
          'log' => array(__FUNCTION__, $_data_log),
          'msg' => 'totp_verification_failed'
        );
      }
    break;
    case "webauthn":
        $key_id = (!isset($_data["key_id"])) ? 'unidentified' : $_data["key_id"];

        $stmt = $pdo->prepare("INSERT INTO `tfa` (`username`, `key_id`, `authmech`, `keyHandle`, `publicKey`, `certificate`, `counter`, `active`)
        VALUES (?, ?, 'webauthn', ?, ?, ?, ?, '1')");
        $stmt->execute(array(
            $username,
            $key_id,
            base64_encode($_data['registration']->credentialId),
            $_data['registration']->credentialPublicKey,
            $_data['registration']->certificate,
            0
        ));
    
        $_SESSION['return'][] =  array(
            'type' => 'success',
            'log' => array(__FUNCTION__, $_data_log),
            'msg' => array('object_modified', $username)
        );
    break;
    case "none":
      $stmt = $pdo->prepare("DELETE FROM `tfa` WHERE `username` = :username");
      $stmt->execute(array(':username' => $username));
      $_SESSION['return'][] =  array(
        'type' => 'success',
        'log' => array(__FUNCTION__, $_data_log),
        'msg' => array('object_modified', htmlspecialchars($username))
      );
    break;
  }
}
function fido2($_data) {
  global $pdo;
  $_data_log = $_data;
  // Not logging registration data, only actions
  // Silent errors for "get" requests
  switch ($_data["action"]) {
    case "register":
      $username = $_SESSION['mailcow_cc_username'];
      if (!isset($_SESSION['mailcow_cc_role']) || empty($username)) {
          $_SESSION['return'][] =  array(
            'type' => 'danger',
            'log' => array(__FUNCTION__, $_data["action"]),
            'msg' => 'access_denied'
          );
          return false;
      }
      $stmt = $pdo->prepare("INSERT INTO `fido2` (`username`, `rpId`, `credentialPublicKey`, `certificateChain`, `certificate`, `certificateIssuer`, `certificateSubject`, `signatureCounter`, `AAGUID`, `credentialId`)
      VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
      $stmt->execute(array(
        $username,
        $_data['registration']->rpId,
        $_data['registration']->credentialPublicKey,
        $_data['registration']->certificateChain,
        $_data['registration']->certificate,
        $_data['registration']->certificateIssuer,
        $_data['registration']->certificateSubject,
        $_data['registration']->signatureCounter,
        $_data['registration']->AAGUID,
        $_data['registration']->credentialId)
      );
      $_SESSION['return'][] =  array(
        'type' => 'success',
        'log' => array(__FUNCTION__, $_data["action"]),
        'msg' => array('object_modified', $username)
      );
    break;
    case "get_user_cids":
      // Used to exclude existing CredentialIds while registering
      $username = $_SESSION['mailcow_cc_username'];
      if (!isset($_SESSION['mailcow_cc_role']) || empty($username)) {
        return false;
      }
      $stmt = $pdo->prepare("SELECT `credentialId` FROM `fido2` WHERE `username` = :username");
      $stmt->execute(array(':username' => $username));
      $rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
      while($row = array_shift($rows)) {
        $cids[] = $row['credentialId'];
      }
      return $cids;
    break;
    case "get_all_cids":
      // Only needed when using fido2 with username
      $stmt = $pdo->query("SELECT `credentialId` FROM `fido2`");
      $rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
      while($row = array_shift($rows)) {
        $cids[] = $row['credentialId'];
      }
      return $cids;
    break;
    case "get_by_b64cid":
      if (!isset($_data['cid']) || empty($_data['cid'])) {
        return false;
      }
      $stmt = $pdo->prepare("SELECT `certificateSubject`, `username`, `credentialPublicKey`, SHA2(`credentialId`, 256) AS `cid` FROM `fido2` WHERE `credentialId` = :cid");
      $stmt->execute(array(':cid' => base64_decode($_data['cid'])));
      $row = $stmt->fetch(PDO::FETCH_ASSOC);
      if (empty($row) || empty($row['credentialPublicKey']) || empty($row['username'])) {
        return false;
      }
      $data['pub_key'] = $row['credentialPublicKey'];
      $data['username'] = $row['username'];
      $data['subject'] = $row['certificateSubject'];
      $data['cid'] = $row['cid'];
      return $data;
    break;
    case "get_friendly_names":
      $username = $_SESSION['mailcow_cc_username'];
      if (!isset($_SESSION['mailcow_cc_role']) || empty($username)) {
        return false;
      }
      $stmt = $pdo->prepare("SELECT SHA2(`credentialId`, 256) AS `cid`, `created`, `certificateSubject`, `friendlyName` FROM `fido2` WHERE `username` = :username");
      $stmt->execute(array(':username' => $username));
      $rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
      while($row = array_shift($rows)) {
        $fns[] = array(
          "subject" => (empty($row['certificateSubject']) ? 'Unknown (' . $row['created'] . ')' : $row['certificateSubject']),
          "fn" => $row['friendlyName'],
          "cid" => $row['cid']
        );
      }
      return $fns;
    break;
    case "unset_fido2_key":
      $username = $_SESSION['mailcow_cc_username'];
      if (!isset($_SESSION['mailcow_cc_role']) || empty($username)) {
        $_SESSION['return'][] =  array(
          'type' => 'danger',
          'log' => array(__FUNCTION__, $_data["action"]),
          'msg' => 'access_denied'
        );
        return false;
      }
      $stmt = $pdo->prepare("DELETE FROM `fido2` WHERE `username` = :username AND SHA2(`credentialId`, 256) = :cid");
      $stmt->execute(array(
        ':username' => $username,
        ':cid' => $_data['post_data']['unset_fido2_key']
      ));
      $_SESSION['return'][] =  array(
        'type' => 'success',
        'log' => array(__FUNCTION__, $_data_log),
        'msg' => array('object_modified', htmlspecialchars($username))
      );
    break;
    case "edit_fn":
      $username = $_SESSION['mailcow_cc_username'];
      if (!isset($_SESSION['mailcow_cc_role']) || empty($username)) {
        $_SESSION['return'][] =  array(
          'type' => 'danger',
          'log' => array(__FUNCTION__, $_data["action"]),
          'msg' => 'access_denied'
        );
        return false;
      }
      $stmt = $pdo->prepare("UPDATE `fido2` SET `friendlyName` = :friendlyName WHERE SHA2(`credentialId`, 256) = :cid AND `username` = :username");
      $stmt->execute(array(
        ':username' => $username,
        ':friendlyName' => $_data['fido2_attrs']['fido2_fn'],
        ':cid' => $_data['fido2_attrs']['fido2_cid']
      ));
      $_SESSION['return'][] =  array(
        'type' => 'success',
        'log' => array(__FUNCTION__, $_data_log),
        'msg' => array('object_modified', htmlspecialchars($username))
      );
    break;
  }
}
function unset_tfa_key($_data) {
  // Can only unset own keys
  // Needs at least one key left
  global $pdo;
  global $lang;
  $_data_log = $_data;
  $access_denied = null;
  $id = intval($_data['unset_tfa_key']);
  $username = $_SESSION['mailcow_cc_username'];

  // check for empty user and role
  if (!isset($_SESSION['mailcow_cc_role']) || empty($username)) $access_denied = true;

  try {
    if (!is_numeric($id)) $access_denied = true;
    
    // set access_denied error
    if ($access_denied){
      $_SESSION['return'][] = array(
        'type' => 'danger',
        'log' => array(__FUNCTION__, $_data_log),
        'msg' => 'access_denied'
      );
      return false;
    } 

    // check if it's last key
    $stmt = $pdo->prepare("SELECT COUNT(*) AS `keys` FROM `tfa`
      WHERE `username` = :username AND `active` = '1'");
    $stmt->execute(array(':username' => $username));
    $row = $stmt->fetch(PDO::FETCH_ASSOC);
    if ($row['keys'] == "1") {
      $_SESSION['return'][] =  array(
        'type' => 'danger',
        'log' => array(__FUNCTION__, $_data_log),
        'msg' => 'last_key'
      );
      return false;
    }

    // delete key
    $stmt = $pdo->prepare("DELETE FROM `tfa` WHERE `username` = :username AND `id` = :id");
    $stmt->execute(array(':username' => $username, ':id' => $id));
    $_SESSION['return'][] =  array(
      'type' => 'success',
      'log' => array(__FUNCTION__, $_data_log),
      'msg' => array('object_modified', $username)
    );
  }
  catch (PDOException $e) {
    $_SESSION['return'][] =  array(
      'type' => 'danger',
      'log' => array(__FUNCTION__, $_data_log),
      'msg' => array('mysql_error', $e)
    );
    return false;
  }
}
function get_tfa($username = null, $id = null) {
  global $pdo;
  if (isset($_SESSION['mailcow_cc_username'])) {
    $username = $_SESSION['mailcow_cc_username'];
  }
  elseif (empty($username)) {
    return false;
  }

  if (!isset($id)){
    // fetch all tfa methods - just get information about possible authenticators
    $stmt = $pdo->prepare("SELECT `id`, `key_id`, `authmech` FROM `tfa`
        WHERE `username` = :username AND `active` = '1'");
    $stmt->execute(array(':username' => $username));
    $results = $stmt->fetchAll(PDO::FETCH_ASSOC);
 
    // no tfa methods found
    if (count($results) == 0) {
        $data['name'] = 'none';
        $data['pretty'] = "-";
        $data['additional'] = array();
        return $data;
    }

    $data['additional'] = $results;
    return $data;
  } else {
    // fetch specific authenticator details by id
    $stmt = $pdo->prepare("SELECT * FROM `tfa`
    WHERE `username` = :username AND `id` = :id AND `active` = '1'");
    $stmt->execute(array(':username' => $username, ':id' => $id));
    $row = $stmt->fetch(PDO::FETCH_ASSOC);

    if (isset($row["authmech"])) {
        switch ($row["authmech"]) {
          case "yubi_otp":
            $data['name'] = "yubi_otp";
            $data['pretty'] = "Yubico OTP";
            $stmt = $pdo->prepare("SELECT `id`, `key_id`, RIGHT(`secret`, 12) AS 'modhex' FROM `tfa` WHERE `authmech` = 'yubi_otp' AND `username` = :username AND `id` = :id");
            $stmt->execute(array(
              ':username' => $username,
              ':id' => $id
            ));
            $rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
            while($row = array_shift($rows)) {
              $data['additional'][] = $row;
            }
            return $data;
          break;
          // u2f - deprecated, should be removed
          case "u2f":
            $data['name'] = "u2f";
            $data['pretty'] = "Fido U2F";
            $stmt = $pdo->prepare("SELECT `id`, `key_id` FROM `tfa` WHERE `authmech` = 'u2f' AND `username` = :username AND `id` = :id");
            $stmt->execute(array(
              ':username' => $username,
              ':id' => $id
            ));
            $rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
            while($row = array_shift($rows)) {
              $data['additional'][] = $row;
            }
            return $data;
          break;
          case "hotp":
            $data['name'] = "hotp";
            $data['pretty'] = "HMAC-based OTP";
            return $data;
          break;
          case "totp":
            $data['name'] = "totp";
            $data['pretty'] = "Time-based OTP";
            $stmt = $pdo->prepare("SELECT `id`, `key_id`, `secret` FROM `tfa` WHERE `authmech` = 'totp' AND `username` = :username AND `id` = :id");
            $stmt->execute(array(
              ':username' => $username,
              ':id' => $id
            ));
            $rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
            while($row = array_shift($rows)) {
              $data['additional'][] = $row;
            }
            return $data;
          break;
          case "webauthn":
            $data['name'] = "webauthn";
            $data['pretty'] = "WebAuthn";
            $stmt = $pdo->prepare("SELECT `id`, `key_id` FROM `tfa` WHERE `authmech` = 'webauthn' AND `username` = :username AND `id` = :id");
            $stmt->execute(array(
              ':username' => $username,
              ':id' => $id
            ));
            $rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
            while($row = array_shift($rows)) {
              $data['additional'][] = $row;
            }
            return $data;
          break;
          default:
            $data['name'] = 'none';
            $data['pretty'] = "-";
            return $data;
          break;
        }
      }
      else {
        $data['name'] = 'none';
        $data['pretty'] = "-";
        return $data;
      }
    }
}
function verify_tfa_login($username, $_data) {
  global $pdo;
  global $yubi;
  global $u2f;
  global $tfa;
  global $WebAuthn;

  if ($_data['tfa_method'] != 'u2f'){

    switch ($_data["tfa_method"]) {
        case "yubi_otp":
            if (!ctype_alnum($_data['token']) || strlen($_data['token']) != 44) {
                $_SESSION['return'][] =  array(
                    'type' => 'danger',
                    'log' => array(__FUNCTION__, $username, '*'),
                    'msg' => array('yotp_verification_failed', 'token length error')
                );
                return false;
            }
            $yubico_modhex_id = substr($_data['token'], 0, 12);
            $stmt = $pdo->prepare("SELECT `id`, `secret` FROM `tfa`
                WHERE `username` = :username
                AND `authmech` = 'yubi_otp'
                AND `active` = '1'
                AND `secret` LIKE :modhex");
            $stmt->execute(array(':username' => $username, ':modhex' => '%' . $yubico_modhex_id));
            $row = $stmt->fetch(PDO::FETCH_ASSOC);
            $yubico_auth = explode(':', $row['secret']);
            $yubi = new Auth_Yubico($yubico_auth[0], $yubico_auth[1]);
            $yauth = $yubi->verify($_data['token']);
            if (PEAR::isError($yauth)) {
                $_SESSION['return'][] =  array(
                    'type' => 'danger',
                    'log' => array(__FUNCTION__, $username, '*'),
                    'msg' => array('yotp_verification_failed', $yauth->getMessage())
                );
                return false;
            }
            else {
                $_SESSION['tfa_id'] = $row['id'];
                $_SESSION['return'][] =  array(
                    'type' => 'success',
                    'log' => array(__FUNCTION__, $username, '*'),
                    'msg' => 'verified_yotp_login'
                );
                return true;
            }
            $_SESSION['return'][] =  array(
                'type' => 'danger',
                'log' => array(__FUNCTION__, $username, '*'),
                'msg' => array('yotp_verification_failed', 'unknown')
            );
            return false;
        break;
        case "hotp":
            return false;
        break;
        case "totp":
          try {
            $stmt = $pdo->prepare("SELECT `id`, `secret` FROM `tfa`
                WHERE `username` = :username
                AND `authmech` = 'totp'
                AND `id` = :id
                AND `active`='1'");
            $stmt->execute(array(':username' => $username, ':id' => $_data['id']));
            $rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
            foreach ($rows as $row) {
              if ($tfa->verifyCode($row['secret'], $_data['token']) === true) {
                $_SESSION['tfa_id'] = $row['id'];
                $_SESSION['return'][] =  array(
                    'type' => 'success',
                    'log' => array(__FUNCTION__, $username, '*'),
                    'msg' => 'verified_totp_login'
                );
                return true;
              }
            }
            $_SESSION['return'][] =  array(
                'type' => 'danger',
                'log' => array(__FUNCTION__, $username, '*'),
                'msg' => 'totp_verification_failed'
            );
            return false;
          }
          catch (PDOException $e) {
            $_SESSION['return'][] =  array(
                'type' => 'danger',
                'log' => array(__FUNCTION__, $username, '*'),
                'msg' => array('mysql_error', $e)
            );
            return false;
          }
        break;
        case "webauthn":
            $tokenData = json_decode($_data['token']);
            $clientDataJSON = base64_decode($tokenData->clientDataJSON);
            $authenticatorData = base64_decode($tokenData->authenticatorData);
            $signature = base64_decode($tokenData->signature);
            $id = base64_decode($tokenData->id);
            $challenge = $_SESSION['challenge'];

            $stmt = $pdo->prepare("SELECT `id`, `key_id`, `keyHandle`, `username`, `publicKey` FROM `tfa` WHERE `id` = :id AND `active`='1'");
            $stmt->execute(array(':id' => $_data['id']));
            $process_webauthn = $stmt->fetch(PDO::FETCH_ASSOC);

            if (empty($process_webauthn)){
              $_SESSION['return'][] =  array(
                  'type' => 'danger',
                  'log' => array(__FUNCTION__, $username, '*'),
                  'msg' => array('webauthn_authenticator_failed')
              );
              return false;
            } 
            
            if (empty($process_webauthn['publicKey']) || $process_webauthn['publicKey'] === false) {
                $_SESSION['return'][] =  array(
                    'type' => 'danger',
                    'log' => array(__FUNCTION__, $username, '*'),
                    'msg' => array('webauthn_publickey_failed')
                );
                return false;
            }

            if ($process_webauthn['username'] != $_SESSION['pending_mailcow_cc_username']){
              $_SESSION['return'][] =  array(
                  'type' => 'danger',
                  'log' => array(__FUNCTION__, $username, '*'),
                  'msg' => array('webauthn_username_failed')
              );
              return false;
            }

            try {
                $WebAuthn->processGet($clientDataJSON, $authenticatorData, $signature, $process_webauthn['publicKey'], $challenge, null, $GLOBALS['WEBAUTHN_UV_FLAG_LOGIN'], $GLOBALS['WEBAUTHN_USER_PRESENT_FLAG']);
            }
            catch (Throwable $ex) {
                $_SESSION['return'][] =  array(
                    'type' => 'danger',
                    'log' => array(__FUNCTION__, $username, '*'),
                    'msg' => array('webauthn_verification_failed', $ex->getMessage())
                );
                return false;
            }

            $stmt = $pdo->prepare("SELECT `superadmin` FROM `admin` WHERE `username` = :username");
            $stmt->execute(array(':username' => $process_webauthn['username']));
            $obj_props = $stmt->fetch(PDO::FETCH_ASSOC);
            if ($obj_props['superadmin'] === 1) {
              $_SESSION["mailcow_cc_role"] = "admin";
            }
            elseif ($obj_props['superadmin'] === 0) {
              $_SESSION["mailcow_cc_role"] = "domainadmin";
            }
            else {
              $stmt = $pdo->prepare("SELECT `username` FROM `mailbox` WHERE `username` = :username");
              $stmt->execute(array(':username' => $process_webauthn['username']));
              $row = $stmt->fetch(PDO::FETCH_ASSOC);
              if (!empty($row['username'])) {
                $_SESSION["mailcow_cc_role"] = "user";
              } else {
                $_SESSION['return'][] =  array(
                  'type' => 'danger',
                  'log' => array(__FUNCTION__, $username, '*'),
                  'msg' => array('webauthn_role_failed')
                );
                return false;
              }
            }

            $_SESSION["mailcow_cc_username"] = $process_webauthn['username'];
            $_SESSION['tfa_id'] = $process_webauthn['id'];
            $_SESSION['authReq'] = null;
            unset($_SESSION["challenge"]);
            $_SESSION['return'][] =  array(
                'type' => 'success',
                'log' => array("webauthn_login"),
                'msg' => array('logged_in_as', $process_webauthn['username'])
            );
            return true;
        break;
        default:
            $_SESSION['return'][] =  array(
            'type' => 'danger',
            'log' => array(__FUNCTION__, $username, '*'),
            'msg' => 'unknown_tfa_method'
            );
            return false;
        break;
    }

    return false;
  } else {
    // delete old keys that used u2f
    $stmt = $pdo->prepare("SELECT * FROM `tfa` WHERE `authmech` = 'u2f' AND `username` = :username");
    $stmt->execute(array(':username' => $username));
    $rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
    if (count($rows) == 0) return false;

    $stmt = $pdo->prepare("DELETE FROM `tfa` WHERE `authmech` = 'u2f' AND `username` = :username");
    $stmt->execute(array(':username' => $username));
    return true;
  }
}
function admin_api($access, $action, $data = null) {
  global $pdo;
  if ($_SESSION['mailcow_cc_role'] != "admin") {
    $_SESSION['return'][] =  array(
      'type' => 'danger',
      'log' => array(__FUNCTION__),
      'msg' => 'access_denied'
    );
    return false;
  }
  if ($access !== "ro" && $access !== "rw") {
    $_SESSION['return'][] =  array(
      'type' => 'danger',
      'log' => array(__FUNCTION__),
      'msg' => 'invalid access type'
    );
    return false;
  }
  if ($action == "edit") {
    $active = (!empty($data['active'])) ? 1 : 0;
    $skip_ip_check = (isset($data['skip_ip_check'])) ? 1 : 0;
    $allow_from = array();
    if (isset($data['allow_from'])) {
      $allow_from = array_map('trim', preg_split( "/( |,|;|\n)/", $data['allow_from']));
    }
    foreach ($allow_from as $key => $val) {
      if (empty($val)) {
        unset($allow_from[$key]);
        continue;
      }
      if (valid_network($val) !== true) {
        $_SESSION['return'][] =  array(
          'type' => 'warning',
          'log' => array(__FUNCTION__, $data),
          'msg' => array('ip_invalid', htmlspecialchars($allow_from[$key]))
        );
        unset($allow_from[$key]);
        continue;
      }
    }
    $allow_from = implode(',', array_unique(array_filter($allow_from)));
    if (empty($allow_from) && $skip_ip_check == 0) {
      $_SESSION['return'][] =  array(
        'type' => 'danger',
        'log' => array(__FUNCTION__, $data),
        'msg' => 'ip_list_empty'
      );
      return false;
    }
    $api_key = implode('-', array(
      strtoupper(bin2hex(random_bytes(3))),
      strtoupper(bin2hex(random_bytes(3))),
      strtoupper(bin2hex(random_bytes(3))),
      strtoupper(bin2hex(random_bytes(3))),
      strtoupper(bin2hex(random_bytes(3)))
    ));
    $stmt = $pdo->query("SELECT `api_key` FROM `api` WHERE `access` = '" . $access . "'");
    $num_results = count($stmt->fetchAll(PDO::FETCH_ASSOC));
    if (empty($num_results)) {
      $stmt = $pdo->prepare("INSERT INTO `api` (`api_key`, `skip_ip_check`, `active`, `allow_from`, `access`)
        VALUES (:api_key, :skip_ip_check, :active, :allow_from, :access);");
      $stmt->execute(array(
        ':api_key' => $api_key,
        ':skip_ip_check' => $skip_ip_check,
        ':active' => $active,
        ':allow_from' => $allow_from,
        ':access' => $access
      ));
    }
    else {
      if ($skip_ip_check == 0) {
        $stmt = $pdo->prepare("UPDATE `api` SET `skip_ip_check` = :skip_ip_check,
          `active` = :active,
          `allow_from` = :allow_from
            WHERE `access` = :access;");
        $stmt->execute(array(
          ':active' => $active,
          ':skip_ip_check' => $skip_ip_check,
          ':allow_from' => $allow_from,
          ':access' => $access
        ));
      }
      else {
        $stmt = $pdo->prepare("UPDATE `api` SET `skip_ip_check` = :skip_ip_check,
          `active` = :active
            WHERE `access` = :access;");
        $stmt->execute(array(
          ':active' => $active,
          ':skip_ip_check' => $skip_ip_check,
          ':access' => $access
        ));
      }
    }
  }
  elseif ($action == "regen_key") {
    $api_key = implode('-', array(
      strtoupper(bin2hex(random_bytes(3))),
      strtoupper(bin2hex(random_bytes(3))),
      strtoupper(bin2hex(random_bytes(3))),
      strtoupper(bin2hex(random_bytes(3))),
      strtoupper(bin2hex(random_bytes(3)))
    ));
    $stmt = $pdo->prepare("UPDATE `api` SET `api_key` = :api_key WHERE `access` = :access");
    $stmt->execute(array(
      ':api_key' => $api_key,
      ':access' => $access
    ));
  }
  elseif ($action == "get") {
    $stmt = $pdo->query("SELECT * FROM `api` WHERE `access` = '" . $access . "'");
    $apidata = $stmt->fetch(PDO::FETCH_ASSOC);
    if ($apidata !== false) {
      $apidata['allow_from'] = str_replace(',', PHP_EOL, $apidata['allow_from']);
    }
    return $apidata;
  }
  $_SESSION['return'][] =  array(
    'type' => 'success',
    'log' => array(__FUNCTION__, $data),
    'msg' => 'admin_api_modified'
  );
}
function license($action, $data = null) {
  global $pdo;
  global $redis;
  global $lang;
  if ($_SESSION['mailcow_cc_role'] != "admin") {
    $_SESSION['return'][] =  array(
      'type' => 'danger',
      'log' => array(__FUNCTION__),
      'msg' => 'access_denied'
    );
    return false;
  }
  switch ($action) {
    case "verify":
      // Keep result until revalidate button is pressed or session expired
      $stmt = $pdo->query("SELECT `version` FROM `versions` WHERE `application` = 'GUID'");
      $versions = $stmt->fetch(PDO::FETCH_ASSOC);
      $post = array('guid' => $versions['version']);
      $curl = curl_init('https://verify.mailcow.email');
      curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
      curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 10);
      curl_setopt($curl, CURLOPT_POSTFIELDS, $post);
      $response = curl_exec($curl);
      curl_close($curl);
      $json_return = json_decode($response, true);
      if ($response && $json_return) {
        if ($json_return['response'] === "ok") {
          $_SESSION['gal']['valid'] = "true";
          $_SESSION['gal']['c'] = $json_return['c'];
          $_SESSION['gal']['s'] = $json_return['s'];
          if ($json_return['m'] == 'NoMoore') {
            $_SESSION['gal']['m'] = '🐄';
          }
          else {
            $_SESSION['gal']['m'] = str_repeat('🐄', substr_count($json_return['m'], 'o'));
          }
        }
        elseif ($json_return['response'] === "invalid") {
          $_SESSION['gal']['valid'] = "false";
          $_SESSION['gal']['c'] = $lang['mailbox']['no'];
          $_SESSION['gal']['s'] = $lang['mailbox']['no'];
          $_SESSION['gal']['m'] = $lang['mailbox']['no'];
        }
      }
      else {
        $_SESSION['gal']['valid'] = "false";
        $_SESSION['gal']['c'] = $lang['danger']['temp_error'];
        $_SESSION['gal']['s'] = $lang['danger']['temp_error'];
        $_SESSION['gal']['m'] = $lang['danger']['temp_error'];
      }
      try {
        // json_encode needs "true"/"false" instead of true/false, to not encode it to 0 or 1
        $redis->Set('LICENSE_STATUS_CACHE', json_encode($_SESSION['gal']));
      }
      catch (RedisException $e) {
        $_SESSION['return'][] = array(
          'type' => 'danger',
          'log' => array(__FUNCTION__, $_action, $_data_log),
          'msg' => array('redis_error', $e)
        );
        return false;
      }
      return $_SESSION['gal']['valid'];
    break;
    case "guid":
      $stmt = $pdo->query("SELECT `version` FROM `versions` WHERE `application` = 'GUID'");
      $versions = $stmt->fetch(PDO::FETCH_ASSOC);
      return $versions['version'];
    break;
  }
}
function rspamd_ui($action, $data = null) {
  if ($_SESSION['mailcow_cc_role'] != "admin") {
    $_SESSION['return'][] =  array(
      'type' => 'danger',
      'log' => array(__FUNCTION__),
      'msg' => 'access_denied'
    );
    return false;
  }
  switch ($action) {
    case "edit":
      $rspamd_ui_pass = $data['rspamd_ui_pass'];
      $rspamd_ui_pass2 = $data['rspamd_ui_pass2'];
      if (empty($rspamd_ui_pass) || empty($rspamd_ui_pass2)) {
        $_SESSION['return'][] =  array(
          'type' => 'danger',
          'log' => array(__FUNCTION__, '*', '*'),
          'msg' => 'password_empty'
        );
        return false;
      }
      if ($rspamd_ui_pass != $rspamd_ui_pass2) {
        $_SESSION['return'][] =  array(
          'type' => 'danger',
          'log' => array(__FUNCTION__, '*', '*'),
          'msg' => 'password_mismatch'
        );
        return false;
      }
      if (strlen($rspamd_ui_pass) < 6) {
        $_SESSION['return'][] =  array(
          'type' => 'danger',
          'log' => array(__FUNCTION__, '*', '*'),
          'msg' => 'rspamd_ui_pw_length'
        );
        return false;
      }
      $docker_return = docker('post', 'rspamd-mailcow', 'exec', array('cmd' => 'rspamd', 'task' => 'worker_password', 'raw' => $rspamd_ui_pass), array('Content-Type: application/json'));
      if ($docker_return_array = json_decode($docker_return, true)) {
        if ($docker_return_array['type'] == 'success') {
          $_SESSION['return'][] =  array(
            'type' => 'success',
            'log' => array(__FUNCTION__, '*', '*'),
            'msg' => 'rspamd_ui_pw_set'
          );
          return true;
        }
        else {
          $_SESSION['return'][] =  array(
            'type' => $docker_return_array['type'],
            'log' => array(__FUNCTION__, '*', '*'),
            'msg' => $docker_return_array['msg']
          );
          return false;
        }
      }
      else {
        $_SESSION['return'][] =  array(
          'type' => 'danger',
          'log' => array(__FUNCTION__, '*', '*'),
          'msg' => 'unknown'
        );
        return false;
      }
    break;
  }
}
function cors($action, $data = null) {
  global $redis;

  switch ($action) {
    case "edit":
      if ($_SESSION['mailcow_cc_role'] != "admin") {
        $_SESSION['return'][] =  array(
          'type' => 'danger',
          'log' => array(__FUNCTION__, $action, $data),
          'msg' => 'access_denied'
        );
        return false;
      }    

      $allowed_origins = isset($data['allowed_origins']) ? $data['allowed_origins'] : array($_SERVER['SERVER_NAME']);
      $allowed_origins = !is_array($allowed_origins) ? array_map('trim', preg_split( "/( |,|;|\n)/", $allowed_origins)) : $allowed_origins;

      $allowed_methods = isset($data['allowed_methods']) ? $data['allowed_methods'] : array('GET', 'POST', 'PUT', 'DELETE');
      $allowed_methods  = !is_array($allowed_methods) ? array_map('trim', preg_split( "/( |,|;|\n)/", $allowed_methods)) : $allowed_methods;
      $available_methods = array('GET', 'POST', 'PUT', 'DELETE', 'OPTION');
      foreach ($allowed_methods as $method) {
        if (!in_array($method, $available_methods)) {
          $_SESSION['return'][] = array(
            'type' => 'danger',
            'log' => array(__FUNCTION__, $action, $data),
            'msg' => 'cors_invalid_method'
          );
          return false;
        }
      }

      try {
        $redis->hMSet('CORS_SETTINGS', array(
          'allowed_origins' => implode(', ', $allowed_origins),
          'allowed_methods' => implode(', ', $allowed_methods)
        ));   
      } 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' => 'cors_headers_edited'
      );
      return true;
    break;
    case "get":
      try {
        $cors_settings                  = $redis->hMGet('CORS_SETTINGS', array('allowed_origins', 'allowed_methods'));
      } catch (RedisException $e) {
        $_SESSION['return'][] = array(
          'type' => 'danger',
          'log' => array(__FUNCTION__, $action, $data),
          'msg' => array('redis_error', $e)
        );
      }

      $cors_settings                    = !$cors_settings ? array('allowed_origins' => $_SERVER['SERVER_NAME'], 'allowed_methods' => 'GET, POST, PUT, DELETE') : $cors_settings;
      $cors_settings['allowed_origins'] = empty($cors_settings['allowed_origins']) ? $_SERVER['SERVER_NAME'] : $cors_settings['allowed_origins'];
      $cors_settings['allowed_methods'] = empty($cors_settings['allowed_methods']) ? 'GET, POST, PUT, DELETE, OPTION' : $cors_settings['allowed_methods'];

      return $cors_settings;
    break;
    case "set_headers":
      $cors_settings = cors('get');
      // check if requested origin is in allowed origins
      $allowed_origins = explode(', ', $cors_settings['allowed_origins']);
      $cors_settings['allowed_origins'] = $allowed_origins[0];
      if (in_array('*', $allowed_origins)){
        $cors_settings['allowed_origins'] = '*';
      } else if (in_array($_SERVER['HTTP_ORIGIN'], $allowed_origins)) {
        $cors_settings['allowed_origins'] = $_SERVER['HTTP_ORIGIN'];
      }
      // always allow OPTIONS for preflight request
      $cors_settings["allowed_methods"] = empty($cors_settings["allowed_methods"]) ? 'OPTIONS' : $cors_settings["allowed_methods"] . ', ' . 'OPTIONS';

      header('Access-Control-Allow-Origin: ' . $cors_settings['allowed_origins']);
      header('Access-Control-Allow-Methods: '. $cors_settings['allowed_methods']);
      header('Access-Control-Allow-Headers: Accept, Content-Type, X-Api-Key, Origin');

      // Access-Control settings requested, this is just a preflight request
      if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS' && 
        isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD']) &&
        isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS'])) {
  
        $allowed_methods = explode(', ', $cors_settings["allowed_methods"]);
        if (in_array($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD'], $allowed_methods, true))
          // method allowed send 200 OK
          http_response_code(200);
        else
          // method not allowed send 405 METHOD NOT ALLOWED
          http_response_code(405);

        exit;
      }
    break;
  }
}

function get_logs($application, $lines = false) {
  if ($lines === false) {
    $lines = $GLOBALS['LOG_LINES'] - 1;
  }
  elseif(is_numeric($lines) && $lines >= 1) {
    $lines = abs(intval($lines) - 1);
  }
  else {
    list ($from, $to) = explode('-', $lines);
    $from = intval($from);
    $to = intval($to);
    if ($from < 1 || $to < $from) { return false; }
  }
  global $redis;
  global $pdo;
  if ($_SESSION['mailcow_cc_role'] != "admin") {
    return false;
  }
  // SQL
  if ($application == "mailcow-ui") {
    if (isset($from) && isset($to)) {
      $stmt = $pdo->prepare("SELECT * FROM `logs` ORDER BY `id` DESC LIMIT :from, :to");
      $stmt->execute(array(
        ':from' => $from - 1,
        ':to' => $to
      ));
      $data = $stmt->fetchAll(PDO::FETCH_ASSOC);
    }
    else {
      $stmt = $pdo->prepare("SELECT * FROM `logs` ORDER BY `id` DESC LIMIT :lines");
      $stmt->execute(array(
        ':lines' => $lines + 1,
      ));
      $data = $stmt->fetchAll(PDO::FETCH_ASSOC);
    }
    if (is_array($data)) {
      return $data;
    }
  }
  if ($application == "sasl") {
    if (isset($from) && isset($to)) {
      $stmt = $pdo->prepare("SELECT * FROM `sasl_log` ORDER BY `datetime` DESC LIMIT :from, :to");
      $stmt->execute(array(
        ':from' => $from - 1,
        ':to' => $to
      ));
      $data = $stmt->fetchAll(PDO::FETCH_ASSOC);
    }
    else {
      $stmt = $pdo->prepare("SELECT * FROM `sasl_log` ORDER BY `datetime` DESC LIMIT :lines");
      $stmt->execute(array(
        ':lines' => $lines + 1,
      ));
      $data = $stmt->fetchAll(PDO::FETCH_ASSOC);
    }
    if (is_array($data)) {
      return $data;
    }
  }
  // Redis
  if ($application == "dovecot-mailcow") {
    if (isset($from) && isset($to)) {
      $data = $redis->lRange('DOVECOT_MAILLOG', $from - 1, $to - 1);
    }
    else {
      $data = $redis->lRange('DOVECOT_MAILLOG', 0, $lines);
    }
    if ($data) {
      foreach ($data as $json_line) {
        $data_array[] = json_decode($json_line, true);
      }
      return $data_array;
    }
  }
  if ($application == "postfix-mailcow") {
    if (isset($from) && isset($to)) {
      $data = $redis->lRange('POSTFIX_MAILLOG', $from - 1, $to - 1);
    }
    else {
      $data = $redis->lRange('POSTFIX_MAILLOG', 0, $lines);
    }
    if ($data) {
      foreach ($data as $json_line) {
        $data_array[] = json_decode($json_line, true);
      }
      return $data_array;
    }
  }
  if ($application == "sogo-mailcow") {
    if (isset($from) && isset($to)) {
      $data = $redis->lRange('SOGO_LOG', $from - 1, $to - 1);
    }
    else {
      $data = $redis->lRange('SOGO_LOG', 0, $lines);
    }
    if ($data) {
      foreach ($data as $json_line) {
        $data_array[] = json_decode($json_line, true);
      }
      return $data_array;
    }
  }
  if ($application == "watchdog-mailcow") {
    if (isset($from) && isset($to)) {
      $data = $redis->lRange('WATCHDOG_LOG', $from - 1, $to - 1);
    }
    else {
      $data = $redis->lRange('WATCHDOG_LOG', 0, $lines);
    }
    if ($data) {
      foreach ($data as $json_line) {
        $data_array[] = json_decode($json_line, true);
      }
      return $data_array;
    }
  }
  if ($application == "acme-mailcow") {
    if (isset($from) && isset($to)) {
      $data = $redis->lRange('ACME_LOG', $from - 1, $to - 1);
    }
    else {
      $data = $redis->lRange('ACME_LOG', 0, $lines);
    }
    if ($data) {
      foreach ($data as $json_line) {
        $data_array[] = json_decode($json_line, true);
      }
      return $data_array;
    }
  }
  if ($application == "ratelimited") {
    if (isset($from) && isset($to)) {
      $data = $redis->lRange('RL_LOG', $from - 1, $to - 1);
    }
    else {
      $data = $redis->lRange('RL_LOG', 0, $lines);
    }
    if ($data) {
      foreach ($data as $json_line) {
        $data_array[] = json_decode($json_line, true);
      }
      return $data_array;
    }
  }
  if ($application == "api-mailcow") {
    if (isset($from) && isset($to)) {
      $data = $redis->lRange('API_LOG', $from - 1, $to - 1);
    }
    else {
      $data = $redis->lRange('API_LOG', 0, $lines);
    }
    if ($data) {
      foreach ($data as $json_line) {
        $data_array[] = json_decode($json_line, true);
      }
      return $data_array;
    }
  }
  if ($application == "netfilter-mailcow") {
    if (isset($from) && isset($to)) {
      $data = $redis->lRange('NETFILTER_LOG', $from - 1, $to - 1);
    }
    else {
      $data = $redis->lRange('NETFILTER_LOG', 0, $lines);
    }
    if ($data) {
      foreach ($data as $json_line) {
        $data_array[] = json_decode($json_line, true);
      }
      return $data_array;
    }
  }
  if ($application == "autodiscover-mailcow") {
    if (isset($from) && isset($to)) {
      $data = $redis->lRange('AUTODISCOVER_LOG', $from - 1, $to - 1);
    }
    else {
      $data = $redis->lRange('AUTODISCOVER_LOG', 0, $lines);
    }
    if ($data) {
      foreach ($data as $json_line) {
        $data_array[] = json_decode($json_line, true);
      }
      return $data_array;
    }
  }
  if ($application == "rspamd-history") {
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_UNIX_SOCKET_PATH, '/var/lib/rspamd/rspamd.sock');
    if (!is_numeric($lines)) {
      list ($from, $to) = explode('-', $lines);
      curl_setopt($curl, CURLOPT_URL,"http://rspamd/history?from=" . intval($from) . "&to=" . intval($to));
    }
    else {
      curl_setopt($curl, CURLOPT_URL,"http://rspamd/history?to=" . intval($lines));
    }
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    $history = curl_exec($curl);
    if (!curl_errno($curl)) {
      $data_array = json_decode($history, true);
      curl_close($curl);
      return $data_array['rows'];
    }
    curl_close($curl);
    return false;
  }
  if ($application == "rspamd-stats") {
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_UNIX_SOCKET_PATH, '/var/lib/rspamd/rspamd.sock');
    curl_setopt($curl, CURLOPT_URL,"http://rspamd/stat");
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    $stats = curl_exec($curl);
    if (!curl_errno($curl)) {
      $data_array = json_decode($stats, true);
      curl_close($curl);
      return $data_array;
    }
    curl_close($curl);
    return false;
  }
  return false;
}
function getGUID() {
  if (function_exists('com_create_guid')) {
    return com_create_guid();
  }
  mt_srand((double)microtime()*10000);//optional for php 4.2.0 and up.
  $charid = strtoupper(md5(uniqid(rand(), true)));
  $hyphen = chr(45);// "-"
  return substr($charid, 0, 8).$hyphen
        .substr($charid, 8, 4).$hyphen
        .substr($charid,12, 4).$hyphen
        .substr($charid,16, 4).$hyphen
        .substr($charid,20,12);
}
function solr_status() {
  $curl = curl_init();
  $endpoint = 'http://solr:8983/solr/admin/cores';
  $params = array(
    'action' => 'STATUS',
    'core' => 'dovecot-fts',
    'indexInfo' => 'true'
  );
  $url = $endpoint . '?' . http_build_query($params);
  curl_setopt($curl, CURLOPT_URL, $url);
  curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($curl, CURLOPT_POST, 0);
  curl_setopt($curl, CURLOPT_TIMEOUT, 10);
  $response_core = curl_exec($curl);
  if ($response_core === false) {
    $err = curl_error($curl);
    curl_close($curl);
    return false;
  }
  else {
    curl_close($curl);
    $curl = curl_init();
    $status_core = json_decode($response_core, true);
    $url = 'http://solr:8983/solr/admin/info/system';
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($curl, CURLOPT_POST, 0);
    curl_setopt($curl, CURLOPT_TIMEOUT, 10);
    $response_sysinfo = curl_exec($curl);
    if ($response_sysinfo === false) {
      $err = curl_error($curl);
      curl_close($curl);
      return false;
    }
    else {
      curl_close($curl);
      $status_sysinfo = json_decode($response_sysinfo, true);
      $status = array_merge($status_core, $status_sysinfo);
      return (!empty($status['status']['dovecot-fts']) && !empty($status['jvm']['memory'])) ? $status : false;
    }
    return (!empty($status['status']['dovecot-fts'])) ? $status['status']['dovecot-fts'] : false;
  }
  return false;
}

function cleanupJS($ignore = '', $folder = '/tmp/*.js') {
  $now = time();
  foreach (glob($folder) as $filename) {
    if(strpos($filename, $ignore) !== false) {
      continue;
    }
    if (is_file($filename)) {
      if ($now - filemtime($filename) >= 60 * 60) {
        unlink($filename);
      }
    }
  }
}

function cleanupCSS($ignore = '', $folder = '/tmp/*.css') {
  $now = time();
  foreach (glob($folder) as $filename) {
    if(strpos($filename, $ignore) !== false) {
      continue;
    }
    if (is_file($filename)) {
      if ($now - filemtime($filename) >= 60 * 60) {
        unlink($filename);
      }
    }
  }
}

?>