postfixadmin/functions.inc.php

<?php
//
// Postfix Admin
// by Mischa Peters <mischa at high5 dot net>
// Copyright (c) 2002 - 2005 High5!
// Licensed under GPL for more info check GPL-LICENSE.TXT
//
// File: functions.inc.php
//
//error_reporting  (E_NOTICE | E_ERROR | E_WARNING | E_PARSE);

if (ereg ("functions.inc.php", $_SERVER['PHP_SELF']))
{
   header ("Location: login.php");
   exit;
}

$version = '2.2 SVN';

/**
 * check_session
 *  Action: Check if a session already exists, if not redirect to login.php
 * Call: check_session ()
 * @return String username (e.g. foo@example.com)
 */
function authentication_get_username()
{
   global $CONF;
   if (!isset($_SESSION['sessid'])) {
      header ("Location: " . $CONF['postfix_admin_url'] . "/login.php");
      exit(0);
   }
   $SESSID_USERNAME = $_SESSION['sessid']['username'];
   return $SESSID_USERNAME;
}

/**
 * Returns the type of user - either 'user' or 'admin' 
 * Returns false if neither (E.g. if not logged in)
 * @return String admin or user or (boolean) false.
 */
function authentication_get_usertype() {
   if(isset($_SESSION['sessid'])) {
      if(isset($_SESSION['sessid']['type'])) {
         return $_SESSION['sessid']['type'];
      }
   }
   return false;
}
/**
 *
 * Used to determine whether a user has a particular role.
 * @param String role-name. (E.g. admin, global-admin or user)
 * @return boolean True if they have the requested role in their session.
 * Note, user < admin < global-admin
 */
function authentication_has_role($role) {
   global $CONF;
   if(isset($_SESSION['sessid'])) {
      if(isset($_SESSION['sessid']['roles'])) {
         if(in_array($role, $_SESSION['sessid']['roles'])) {
            return true;
         }
      }
   }
   return false;
}

/**
 * Used to enforce that $user has a particular role when 
 * viewing a page.
 * If they are lacking a role, redirect them to 
 * $CONF['postfix_admin_url']/login.php
 *
 * Note, user < admin < global-admin
 */
function authentication_require_role($role) {
   // redirect to appropriate page?
   if(authentication_has_role($role)) {
      return True;
   }
   header("Location: " . $CONF['postfix_admin_url'] . "/login.php");
   exit(0);
}
/**
 * @return boolean TRUE if a admin, FALSE otherwise.
 */
function authentication_is_admin() {
   return authentication_get_usertype() == 'admin';
}

/**
 * @return boolean TRUE if a user, FALSE otherwise.
 */
function authentication_is_user() {
   return authentication_get_usertype() == 'user';
}


//
// check_language
// Action: checks what language the browser uses
// Call: check_language
//
function check_language ()
{
   global $CONF;
   $lang = $CONF['default_language'];
   $supported_languages = array ('bg', 'ca', 'cn', 'cs', 'da', 'de', 'en', 'es', 'et', 'eu', 'fi', 'fo', 'fr', 'hu', 'is', 'it', 'mk', 'nl', 'nn', 'pl', 'pt-br', 'ru', 'sl', 'sv', 'tr', 'tw');
   if(isset($_SERVER['HTTP_ACCEPT_LANGUAGE']))
   {
      $lang_array = preg_split ('/(\s*,\s*)/', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
      for($i = 0; $i < count($lang_array); $i++)
      {
         $lang_next = $lang_array[$i];
         $lang_next = strtolower(substr(trim($lang_next), 0, 2));
         if(in_array($lang_next, $supported_languages))
         {
            $lang = $lang_next;
            break;
         }
      }
   }
   return $lang;
}



//
// check_string
// Action: checks if a string is valid and returns TRUE if this is the case.
// Call: check_string (string var)
//
function check_string ($var)
{
   if (preg_match ('/^([A-Za-z0-9 ]+)+$/', $var))
   {
      return true;
   }
   else
   {
      return false;
   }
}



//
// check_domain
// Action: Checks if domain is valid and returns TRUE if this is the case.
// Call: check_domain (string domain)
//
// TODO: make check_domain able to handle as example .local domains
function check_domain ($domain)
{
   if (preg_match ('/([-0-9A-Z]+\.)+' . '([0-9A-Z]){2,4}$/i', trim ($domain)))
   {
      return true;
   }
   else
   {
      return false;
   }
}



//
// check_email
// Action: Checks if email is valid and returns TRUE if this is the case.
// Call: check_email (string email)
//
// TODO: make check_email able to handle already added domains
function check_email ($email)
{
   global $CONF;

   $ce_email=$email;

   //strip the vacation domain out if we are using it
   if ($CONF['vacation'] == 'YES')
   { 
      $vacation_domain = $CONF['vacation_domain'];
      $ce_email = preg_replace("/@$vacation_domain/", '', $ce_email);
   }

   if (
      isset($CONF['emailcheck_resolve_domain'])
      && 'YES'==$CONF['emailcheck_resolve_domain']
      && 'WINDOWS'!=(strtoupper(substr(php_uname('s'), 0, 7)))
         ) {

            // Perform non-domain-part sanity checks
            if (!preg_match ('/^[-!#$%&\'*+\\.\/0-9=?A-Z^_{|}~]+' . '@' . '[^@]+$/i', trim ($ce_email)))
            {
               return false;
            }

            // Determine domain name
            $matches=array();
            if (!preg_match('|@(.+)$|',$ce_email,$matches))
            {
               return false;
            }
            $domain=$matches[1];

            // Look for an AAAA, A, or MX record for the domain

            // AAAA (IPv6) is only available in PHP v. >= 5
            if (version_compare(phpversion(), "5.0.0", ">="))
            {
               if (checkdnsrr($domain,'AAAA')) return true;
            }

            if (checkdnsrr($domain,'A')) return true;
            if (checkdnsrr($domain,'MX')) return true;

            return false;
         }

   if (preg_match ('/^[-!#$%&\'*+\\.\/0-9=?A-Z^_{|}~]+' . '@' . '([-0-9A-Z]+\.)+' . '([0-9A-Z]){2,6}$/i', trim ($ce_email)))
   {
      return true;
   }
   else
   {
      return false;
   }
}



//
// escape_string
// Action: Escape a string
// Call: escape_string (string string)
//
(ini_get('magic_quotes_gpc') ? ini_set('magic_quotes_runtime', '0') : '1');
(ini_get('magic_quotes_gpc') ? ini_set('magic_quotes_sybase', '0') : '1');
function escape_string ($string)
{
   global $CONF;
   if (get_magic_quotes_gpc ())
   {
      $string = stripslashes($string);
   }
   if (!is_numeric($string))
   {
      $link = db_connect();
      if ($CONF['database_type'] == "mysql")
      {
         $escaped_string = mysql_real_escape_string($string, $link);
      }
      if ($CONF['database_type'] == "mysqli")
      {
         $escaped_string = mysqli_real_escape_string($link, $string);
      }
      if ($CONF['database_type'] == "pgsql") 
      {
         // php 5.2+ allows for $link to be specified.
         if (version_compare(phpversion(), "5.2.0", ">="))
         {
            $escaped_string = pg_escape_string($link, $string);
         }
         else 
         {
            $escaped_string = pg_escape_string($string);
         }
      }
   }
   else
   {
      $escaped_string = $string;
   }
   return $escaped_string;
}



//
// get_domain_properties
// Action: Get all the properties of a domain.
// Call: get_domain_properties (string domain)
//
function get_domain_properties ($domain)
{
   global $CONF;
   global $table_alias, $table_mailbox, $table_domain;
   $list = array ();

   $result = db_query ("SELECT COUNT(*) FROM $table_alias WHERE domain='$domain'");
   $row = db_row ($result['result']);
   $list['alias_count'] = $row[0];

   $result = db_query ("SELECT COUNT(*) FROM $table_mailbox WHERE domain='$domain'");
   $row = db_row ($result['result']);
   $list['mailbox_count'] = $row[0];

   $result = db_query ("SELECT SUM(quota) FROM $table_mailbox WHERE domain='$domain'");
   $row = db_row ($result['result']);
   $list['quota_sum'] = $row[0];
   $list['alias_count'] = $list['alias_count'] - $list['mailbox_count'];

   $list['alias_pgindex']=array ();
   $list['mbox_pgindex']=array ();
   $list['mbox_pgindex_count'] = 0;
   //while loop to figure index names. use page_size and loop of queries
   $i=0;
   $current=0;
   $page_size = $CONF['page_size'];
   $tmpstr="";
   $idxlabel="";
   $list['alias_pgindex_count'] = 0;

   if ( $list['alias_count'] > $page_size )
   {
      while ( $current < $list['alias_count'] )
      { 
         $limitSql=('pgsql'==$CONF['database_type']) ? "1 OFFSET $current" : "$current, 1";
         $query = "SELECT $table_alias.address FROM $table_alias LEFT JOIN $table_mailbox ON $table_alias.address=$table_mailbox.username WHERE $table_alias.domain='$domain' AND $table_mailbox.maildir IS NULL ORDER BY $table_alias.address LIMIT $limitSql";
         $result = db_query ("$query");
         $row = db_array ($result['result']);
         $tmpstr = $row['address'];
         //get first 2 chars
         $idxlabel = $tmpstr[0] . $tmpstr[1] . "-";
         ($current + $page_size - 1 <= $list['alias_count']) ? $current = $current + $page_size - 1 : $current = $list['alias_count'] - 1;
         $limitSql=('pgsql'==$CONF['database_type']) ? "1 OFFSET $current" : "$current, 1";
         $query = "SELECT $table_alias.address FROM $table_alias LEFT JOIN $table_mailbox ON $table_alias.address=$table_mailbox.username WHERE $table_alias.domain='$domain' AND $table_mailbox.maildir IS NULL ORDER BY $table_alias.address LIMIT $limitSql";
         $result = db_query ("$query");
         $row = db_array ($result['result']);
         $tmpstr = $row['address'];
         $idxlabel = $idxlabel . $tmpstr[0] . $tmpstr[1];

         $current = $current + 1;

         $list['alias_pgindex'][]=$idxlabel;
         $i++;
      }
      $list['alias_pgindex_count']=$i;
   }

   $i=0;
   $current=0;
   $page_size = $CONF['page_size'];
   $tmpstr="";
   $idxlabel="";

   if ( $list['mailbox_count'] > $page_size )
   {
      while ( $current < $list['mailbox_count'] )
      { 
         $limitSql=('pgsql'==$CONF['database_type']) ? "1 OFFSET $current" : "$current, 1";
         $query = "SELECT $table_mailbox.username FROM $table_mailbox WHERE $table_mailbox.domain='$domain' ORDER BY $table_mailbox.username LIMIT $limitSql";
         $result = db_query ("$query");
         $row = db_array ($result['result']);
         $tmpstr = $row['username'];
         //get first 2 chars
         $idxlabel = $tmpstr[0] . $tmpstr[1] . "-";
         ($current + $page_size - 1 <= $list['mailbox_count']) ? $current = $current + $page_size - 1 : $current = $list['mailbox_count'] - 1;
         $limitSql=('pgsql'==$CONF['database_type']) ? "1 OFFSET $current" : "$current, 1";
         $query = "SELECT $table_mailbox.username FROM $table_mailbox WHERE $table_mailbox.domain='$domain' ORDER BY $table_mailbox.username LIMIT $limitSql";
         $result = db_query ("$query");
         $row = db_array ($result['result']);
         $tmpstr = $row['username'];
         $idxlabel = $idxlabel . $tmpstr[0] . $tmpstr[1];

         $current = $current + 1;

         $list['mbox_pgindex'][]=$idxlabel;
         $i++;
      }
      $list['mbox_pgindex_count']=$i;
   }

   // end mod

   $query="SELECT * FROM $table_domain WHERE domain='$domain'";
   if ('pgsql'==$CONF['database_type'])
   {
      $query=" SELECT *, EXTRACT(epoch FROM created) AS uts_created, EXTRACT(epoch FROM modified) AS uts_modified FROM $table_domain WHERE domain='$domain' ";
   }
   $result = db_query ($query);
   $row = db_array ($result['result']);
   $list['description'] = $row['description'];
   $list['aliases'] = $row['aliases'];
   $list['mailboxes'] = $row['mailboxes'];
   $list['maxquota'] = $row['maxquota'];
   $list['quota'] = $row['quota'];
   $list['transport'] = $row['transport'];
   $list['backupmx'] = $row['backupmx'];
   $list['created'] = $row['created'];
   $list['modified'] = $row['modified'];
   $list['active'] = $row['active'];

   if ($CONF['database_type'] == "pgsql")
   {
      $list['active']=('t'==$row['active']) ? 1 : 0;
      $list['backupmx']=('t'==$row['backupmx']) ? 1 : 0;
      $list['created']= gmstrftime('%c %Z',$row['uts_created']);
      $list['modified']= gmstrftime('%c %Z',$row['uts_modified']);
   }
   else
   {
      $list['active'] = $row['active'];
      $list['backupmx'] = $row['backupmx'];
   }

   return $list;
}



//
// get_mailbox_properties
// Action: Get all the properties of a mailbox.
// Call: get_mailbox_properties (string mailbox)
//
function get_mailbox_properties ($username)
{
   global $CONF;
   global $table_mailbox;
   $query="SELECT * FROM $table_mailbox WHERE username='$username'";
   if ('pgsql'==$CONF['database_type'])
   {
      $query="
         SELECT
         *,
         EXTRACT(epoch FROM created) AS uts_created,
         EXTRACT(epoch FROM modified) AS uts_modified
         FROM $table_mailbox
         WHERE username='$username'
         ";
   }
   $result = db_query ($query);
   $row = db_array ($result['result']);
   $list['name'] = $row['name'];
   $list['maildir'] = $row['maildir'];
   $list['quota'] = $row['quota'];
   $list['domain'] = $row['domain'];
   $list['created'] = $row['created'];
   $list['modified'] = $row['modified'];
   $list['active'] = $row['active'];

   if ($CONF['database_type'] == "pgsql")
   {
      $list['active']=('t'==$row['active']) ? 1 : 0;
      $list['created']= gmstrftime('%c %Z',$row['uts_created']);
      $list['modified']= gmstrftime('%c %Z',$row['uts_modified']);
   }
   else
   {
      $list['active'] = $row['active'];
   }

   return $list;
}



//
// check_alias
// Action: Checks if the domain is still able to create aliases.
// Call: check_alias (string domain)
//
function check_alias ($domain)
{
   $limit = get_domain_properties ($domain);
   if ($limit['aliases'] == 0)
   {
      return true;
   }
   if ($limit['aliases'] < 0)
   {
      return false;
   }
   if ($limit['alias_count'] >= $limit['aliases'])
   {
      return false;
   }
   else
   {
      return true;
   }
}



//
// check_mailbox
// Action: Checks if the domain is still able to create mailboxes.
// Call: check_mailbox (string domain)
//
function check_mailbox ($domain)
{
   $limit = get_domain_properties ($domain);
   if ($limit['mailboxes'] == 0)
   {
      return true;
   }
   if ($limit['mailboxes'] < 0)
   {
      return false;
   }
   if ($limit['mailbox_count'] >= $limit['mailboxes'])
   {
      return false;
   }
   else
   {
      return true;
   }
}



//
// check_quota
// Action: Checks if the user is creating a mailbox with the correct quota
// Call: check_quota (string domain)
//
function check_quota ($quota, $domain)
{
   $limit = get_domain_properties ($domain);
   if ($limit['maxquota'] == 0)
   {
      return true;
   }
   if (($limit['maxquota'] < 0) and ($quota < 0))
   {
      return true;
   }
   if (($limit['maxquota'] > 0) and ($quota == 0))
   {
      return false;
   }
   if ($quota > $limit['maxquota'])
   {
      return false;
   }
   else
   {
      return true;
   }
}



//
// multiply_quota
// Action: Recalculates the quota from bytes to MBs (multiply, *)
// Call: multiply_quota (string $quota)
//
function multiply_quota ($quota)
{
   global $CONF;
   if ($quota == -1) return $quota;
   $value = $quota * $CONF['quota_multiplier'];
   return $value;
}



//
// divide_quota
// Action: Recalculates the quota from MBs to bytes (divide, /)
// Call: divide_quota (string $quota)
//
function divide_quota ($quota)
{
   global $CONF;
   if ($quota == -1) return $quota;
   $value = $quota / $CONF['quota_multiplier'];
   return $value;
}



//
// check_owner
// Action: Checks if the admin is the owner of the domain.
// Call: check_owner (string admin, string domain)
//
function check_owner ($username, $domain)
{
   global $table_domain_admins;
   $result = db_query ("SELECT 1 FROM $table_domain_admins WHERE username='$username' AND (domain='$domain' OR domain='ALL') AND active='1'");
   if ($result['rows'] != 1)
   {
      return false;
   }
   else
   {
      return true;
   }
}



//
// check_alias_owner
// Action: Checks if the admin is the owner of the alias.
// Call: check_alias_owner (string admin, string alias)
//
function check_alias_owner ($username, $alias)
{
   global $CONF;
   if (authentication_has_role('global-admin')) return true;
   $tmp = preg_split('/\@/', $alias);
   if (($CONF['special_alias_control'] == 'NO') && array_key_exists($tmp[0], $CONF['default_aliases']))
   {
      return false;
   }
   else
   {
      return true;
   }
}



//
// list_domains_for_admin
// Action: Lists all the domains for an admin.
// Call: list_domains_for_admin (string admin)
//
function list_domains_for_admin ($username)
{
   global $CONF;
   global $table_domain, $table_domain_admins;
   $list = array ();

   $query = "SELECT $table_domain.domain FROM $table_domain LEFT JOIN $table_domain_admins ON $table_domain.domain=$table_domain_admins.domain WHERE $table_domain_admins.username='$username' AND $table_domain.active='1' AND $table_domain.backupmx='0' ORDER BY $table_domain_admins.domain";
   if ('pgsql'==$CONF['database_type'])
   {
      $query = "SELECT $table_domain.domain FROM $table_domain LEFT JOIN $table_domain_admins ON $table_domain.domain=$table_domain_admins.domain WHERE $table_domain_admins.username='$username' AND $table_domain.active=true AND $table_domain.backupmx=false ORDER BY $table_domain_admins.domain";
   }
   $result = db_query ($query);
   if ($result['rows'] > 0)
   {
      $i = 0;
      while ($row = db_array ($result['result']))
      {
         $list[$i] = $row['domain'];
         $i++;
      }
   }
   return $list;
}



//
// list_domains
// Action: List all available domains.
// Call: list_domains ()
//
function list_domains ()
{
   global $table_domain;
   $list = array();

   $result = db_query ("SELECT domain FROM $table_domain WHERE domain!='ALL' ORDER BY domain");
   if ($result['rows'] > 0)
   {
      $i = 0;
      while ($row = db_array ($result['result']))
      {
         $list[$i] = $row['domain'];
         $i++;
      }
   }
   return $list;
}




//
// admin_exist
// Action: Checks if the admin already exists.
// Call: admin_exist (string admin)
//
function admin_exist ($username)
{
   global $table_admin;

   $result = db_query ("SELECT 1 FROM $table_admin WHERE username='$username'");
   if ($result['rows'] != 1)
   {
      return false;
   }
   else
   {
      return true;
   }
}



//
// domain_exist
// Action: Checks if the domain already exists.
// Call: domain_exist (string domain)
//
function domain_exist ($domain)
{
   global $table_domain;

   $result = db_query ("SELECT 1 FROM $table_domain WHERE domain='$domain'");
   if ($result['rows'] != 1)
   {
      return false;
   }
   else
   {
      return true;
   }
}



//
// list_admins
// Action: Lists all the admins
// Call: list_admins ()
//
// was admin_list_admins
//
function list_admins ()
{
   global $table_admin;
   $list = "";

   $result = db_query ("SELECT username FROM $table_admin ORDER BY username");
   if ($result['rows'] > 0)
   {
      $i = 0;
      while ($row = db_array ($result['result']))
      {
         $list[$i] = $row['username'];
         $i++;
      }
   }
   return $list;
}



//
// get_admin_properties
// Action: Get all the admin properties.
// Call: get_admin_properties (string admin)
//
function get_admin_properties ($username)
{
   global $CONF;
   global $table_admin, $table_domain_admins;
   $list = array ();

   $result = db_query ("SELECT * FROM $table_domain_admins WHERE username='$username' AND domain='ALL'");
   if ($result['rows'] == 1)
   {
      $list['domain_count'] = 'ALL';
   }
   else
   {
      $result = db_query ("SELECT COUNT(*) FROM $table_domain_admins WHERE username='$username'");
      $row = db_row ($result['result']);
      $list['domain_count'] = $row[0];
   }

   $query = "SELECT * FROM $table_admin WHERE username='$username'";
   if ('pgsql'==$CONF['database_type']) {
      $query="
         SELECT
         *,
         EXTRACT(epoch FROM created) AS uts_created,
         EXTRACT (epoch FROM modified) AS uts_modified
         FROM $table_admin
         WHERE username='$username'
         ";
   }

   $result = db_query ($query);
   $row = db_array ($result['result']);
   $list['created'] = $row['created'];
   $list['modified'] = $row['modified'];
   $list['active'] = $row['active'];
   if ('pgsql'==$CONF['database_type']) {
      $list['active'] = ('t'==$row['active']) ? 1 : 0;
      $list['created']= gmstrftime('%c %Z',$row['uts_created']);
      $list['modified']= gmstrftime('%c %Z',$row['uts_modified']);
   }
   return $list;
}



//
// encode_header
// Action: Encode a string according to RFC 1522 for use in headers if it contains 8-bit characters.
// Call: encode_header (string header, string charset)
//
function encode_header ($string, $default_charset)
{
   if (strtolower ($default_charset) == 'iso-8859-1')
   {
      $string = str_replace ("\240",' ',$string);
   }

   $j = strlen ($string);
   $max_l = 75 - strlen ($default_charset) - 7;
   $aRet = array ();
   $ret = '';
   $iEncStart = $enc_init = false;
   $cur_l = $iOffset = 0;

   for ($i = 0; $i < $j; ++$i)
   {
      switch ($string{$i})
      {
      case '=':
      case '<':
      case '>':
      case ',':
      case '?':
      case '_':
         if ($iEncStart === false)
         {
            $iEncStart = $i;
         }
         $cur_l+=3;
         if ($cur_l > ($max_l-2))
         {
            $aRet[] = substr ($string,$iOffset,$iEncStart-$iOffset);
            $aRet[] = "=?$default_charset?Q?$ret?=";
            $iOffset = $i;
            $cur_l = 0;
            $ret = '';
            $iEncStart = false;
         }
         else
         {
            $ret .= sprintf ("=%02X",ord($string{$i}));
         }
         break;
      case '(':
      case ')':
         if ($iEncStart !== false)
         {
            $aRet[] = substr ($string,$iOffset,$iEncStart-$iOffset);
            $aRet[] = "=?$default_charset?Q?$ret?=";
            $iOffset = $i;
            $cur_l = 0;
            $ret = '';
            $iEncStart = false;
         }
         break;
      case ' ':
         if ($iEncStart !== false)
         {
            $cur_l++;
            if ($cur_l > $max_l)
            {
               $aRet[] = substr ($string,$iOffset,$iEncStart-$iOffset);
               $aRet[] = "=?$default_charset?Q?$ret?=";
               $iOffset = $i;
               $cur_l = 0;
               $ret = '';
               $iEncStart = false;
            }
            else
            {
               $ret .= '_';
            }
         }
         break;
      default:
         $k = ord ($string{$i});
         if ($k > 126)
         {
            if ($iEncStart === false)
            {
               // do not start encoding in the middle of a string, also take the rest of the word.
               $sLeadString = substr ($string,0,$i);
               $aLeadString = explode (' ',$sLeadString);
               $sToBeEncoded = array_pop ($aLeadString);
               $iEncStart = $i - strlen ($sToBeEncoded);
               $ret .= $sToBeEncoded;
               $cur_l += strlen ($sToBeEncoded);
            }
            $cur_l += 3;
            // first we add the encoded string that reached it's max size
            if ($cur_l > ($max_l-2))
            {
               $aRet[] = substr ($string,$iOffset,$iEncStart-$iOffset);
               $aRet[] = "=?$default_charset?Q?$ret?= ";
               $cur_l = 3;
               $ret = '';
               $iOffset = $i;
               $iEncStart = $i;
            }
            $enc_init = true;
            $ret .= sprintf ("=%02X", $k);
         }
         else
         {
            if ($iEncStart !== false)
            {
               $cur_l++;
               if ($cur_l > $max_l)
               {
                  $aRet[] = substr ($string,$iOffset,$iEncStart-$iOffset);
                  $aRet[] = "=?$default_charset?Q?$ret?=";
                  $iEncStart = false;
                  $iOffset = $i;
                  $cur_l = 0;
                  $ret = '';
               }
               else
               {
                  $ret .= $string{$i};
               }
            }
         }
         break;
      }
   }
   if ($enc_init)
   {
      if ($iEncStart !== false)
      {
         $aRet[] = substr ($string,$iOffset,$iEncStart-$iOffset);
         $aRet[] = "=?$default_charset?Q?$ret?=";
      }
      else
      {
         $aRet[] = substr ($string,$iOffset);
      }
      $string = implode ('',$aRet);
   }
   return $string;
}



//
// generate_password
// Action: Generates a random password
// Call: generate_password ()
//
function generate_password ()
{
   $password = substr (md5 (mt_rand ()), 0, 8);
   return $password;
}



//
// pacrypt
// Action: Encrypts password based on config settings
// Call: pacrypt (string cleartextpassword)
//
function pacrypt ($pw, $pw_db="")
{
   global $CONF;
   $pw = stripslashes($pw);
   $password = "";
   $salt = "";

   if ($CONF['encrypt'] == 'md5crypt') {
      $split_salt = preg_split ('/\$/', $pw_db);
      if (isset ($split_salt[2])) {
         $salt = $split_salt[2];
      }
      $password = md5crypt ($pw, $salt);
   }

   if ($CONF['encrypt'] == 'md5') {
      $password = md5($pw);
   }

   if ($CONF['encrypt'] == 'system') {
      if (ereg ("\$1\$", $pw_db)) {
         $split_salt = preg_split ('/\$/', $pw_db);
         $salt = $split_salt[2];
      }
      else {
         if (strlen($pw_db) == 0) {
            $salt = substr (md5 (mt_rand ()), 0, 2);
         }
         else {
            $salt = substr ($pw_db, 0, 2);
         }
      }
      $password = crypt ($pw, $salt);
   }

   if ($CONF['encrypt'] == 'cleartext') {
      $password = $pw;
   }
   $password = escape_string ($password);
   return $password;
}

//
// md5crypt
// Action: Creates MD5 encrypted password
// Call: md5crypt (string cleartextpassword)
//
$MAGIC = "$1$";
$ITOA64 = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

function md5crypt ($pw, $salt="", $magic="")
{
   global $MAGIC;

   if ($magic == "") $magic = $MAGIC;
   if ($salt == "") $salt = create_salt ();
   $slist = explode ("$", $salt);
   if ($slist[0] == "1") $salt = $slist[1];

   $salt = substr ($salt, 0, 8);
   $ctx = $pw . $magic . $salt;
   $final = hex2bin (md5 ($pw . $salt . $pw));

   for ($i=strlen ($pw); $i>0; $i-=16)
   {
      if ($i > 16)
      {
         $ctx .= substr ($final,0,16);
      }
      else
      {
         $ctx .= substr ($final,0,$i);
      }
   }
   $i = strlen ($pw);

   while ($i > 0)
   {
      if ($i & 1) $ctx .= chr (0);
      else $ctx .= $pw[0];
      $i = $i >> 1;
   }
   $final = hex2bin (md5 ($ctx));

   for ($i=0;$i<1000;$i++)
   {
      $ctx1 = "";
      if ($i & 1)
      {
         $ctx1 .= $pw;
      }
      else
      {
         $ctx1 .= substr ($final,0,16);
      }
      if ($i % 3) $ctx1 .= $salt;
      if ($i % 7) $ctx1 .= $pw;
      if ($i & 1)
      {
         $ctx1 .= substr ($final,0,16);
      }
      else
      {
         $ctx1 .= $pw;
      }
      $final = hex2bin (md5 ($ctx1));
   }
   $passwd = "";
   $passwd .= to64 (((ord ($final[0]) << 16) | (ord ($final[6]) << 8) | (ord ($final[12]))), 4);
   $passwd .= to64 (((ord ($final[1]) << 16) | (ord ($final[7]) << 8) | (ord ($final[13]))), 4);
   $passwd .= to64 (((ord ($final[2]) << 16) | (ord ($final[8]) << 8) | (ord ($final[14]))), 4);
   $passwd .= to64 (((ord ($final[3]) << 16) | (ord ($final[9]) << 8) | (ord ($final[15]))), 4);
   $passwd .= to64 (((ord ($final[4]) << 16) | (ord ($final[10]) << 8) | (ord ($final[5]))), 4);
   $passwd .= to64 (ord ($final[11]), 2);
   return "$magic$salt\$$passwd";
}

function create_salt ()
{
   srand ((double) microtime ()*1000000);
   $salt = substr (md5 (rand (0,9999999)), 0, 8);
   return $salt;
}

function hex2bin ($str)
{
   $len = strlen ($str);
   $nstr = "";
   for ($i=0;$i<$len;$i+=2)
   {
      $num = sscanf (substr ($str,$i,2), "%x");
      $nstr.=chr ($num[0]);
   }
   return $nstr;
}

function to64 ($v, $n)
{
   global $ITOA64;
   $ret = "";
   while (($n - 1) >= 0)
   {
      $n--;
      $ret .= $ITOA64[$v & 0x3f];
      $v = $v >> 6;
   }
   return $ret;
}



//
// smtp_mail
// Action: Sends email to new account.
// Call: smtp_mail (string To, string From, string Data)
//
function smtp_mail ($to, $from, $data)
{
   global $CONF;
   $smtpd_server = $CONF['smtp_server'];
   $smtpd_port = $CONF['smtp_port'];
   $smtp_server = $_SERVER["SERVER_NAME"];
   $errno = "0";
   $errstr = "0";
   $timeout = "30";

   $fh = @fsockopen ($smtpd_server, $smtpd_port, $errno, $errstr, $timeout);

   if (!$fh)
   {
      return false;
   }
   else
   {
      fputs ($fh, "EHLO $smtp_server\r\n");
      $res = smtp_get_response($fh);
      fputs ($fh, "MAIL FROM:<$from>\r\n");
      $res = smtp_get_response($fh);
      fputs ($fh, "RCPT TO:<$to>\r\n");
      $res = smtp_get_response($fh);
      fputs ($fh, "DATA\r\n");
      $res = smtp_get_response($fh);
      fputs ($fh, "$data\r\n.\r\n");
      $res = smtp_get_response($fh);
      fputs ($fh, "QUIT\r\n");
      $res = smtp_get_response($fh);
      fclose ($fh);
   }
   return true;
}



//
// smtp_get_response
// Action: Get response from mail server
// Call: smtp_get_response (string FileHandle)
//
function smtp_get_response ($fh)
{
   $res ='';
   do
{
   $line = fgets($fh, 256);
   $res .= $line;
}
while (preg_match("/^\d\d\d\-/", $line));
return $res;
}



$DEBUG_TEXT = "\n
   <p />\n
   Please check the documentation and website for more information.\n
   <p />\n
   <a href=\"http://high5.net/postfixadmin/\">Postfix Admin</a><br />\n
   <a href=\"http://forums.high5.net/index.php?showforum=7\">Knowledge Base</a>\n
   ";



//
// db_connect
// Action: Makes a connection to the database if it doesn't exist
// Call: db_connect ()
//
function db_connect ()
{
   global $CONF;
   global $DEBUG_TEXT;

   if ($CONF['database_type'] == "mysql")
   {
      if (function_exists ("mysql_connect"))
      {
         $link = @mysql_connect ($CONF['database_host'], $CONF['database_user'], $CONF['database_password']) or die ("<p />DEBUG INFORMATION:<br />Connect: " .  mysql_error () . "$DEBUG_TEXT");
         @mysql_query("SET CHARACTER SET utf8",$link);
         @mysql_query("SET COLLATION_CONNECTION='utf8_general_ci'",$link);
         $succes = @mysql_select_db ($CONF['database_name'], $link) or die ("<p />DEBUG INFORMATION:<br />MySQL Select Database: " .  mysql_error () . "$DEBUG_TEXT");
      }
      else
      {
         print "<p />DEBUG INFORMATION:<br />MySQL 3.x / 4.0 functions not available!<br />database_type = 'mysql' in config.inc.php, are you using a different database? $DEBUG_TEXT";
         die();
      }
   }

   if ($CONF['database_type'] == "mysqli")
   {
      if (function_exists ("mysqli_connect"))
      {
         $link = @mysqli_connect ($CONF['database_host'], $CONF['database_user'], $CONF['database_password']) or die ("<p />DEBUG INFORMATION:<br />Connect: " .  mysqli_connect_error () . "$DEBUG_TEXT");
         @mysqli_query($link,"SET CHARACTER SET utf8");
         @mysqli_query($link,"SET COLLATION_CONNECTION='utf8_general_ci'");
         $success = @mysqli_select_db ($link, $CONF['database_name']) or die ("<p />DEBUG INFORMATION:<br />MySQLi Select Database: " .  mysqli_error ($link) . "$DEBUG_TEXT");
      }
      else
      {
         print "<p />DEBUG INFORMATION:<br />MySQL 4.1 functions not available!<br />database_type = 'mysqli' in config.inc.php, are you using a different database? $DEBUG_TEXT";
         die();
      }
   }

   if ($CONF['database_type'] == "pgsql")
   {
      if (function_exists ("pg_pconnect"))
      {
         $connect_string = "host=" . $CONF['database_host'] . " dbname=" . $CONF['database_name'] . " user=" . $CONF['database_user'] . " password=" . $CONF['database_password'];
         $link = @pg_pconnect ($connect_string) or die ("<p />DEBUG INFORMATION:<br />Connect: " .  pg_last_error($link) . "$DEBUG_TEXT");
         pg_set_client_encoding($link, 'UNICODE');
      }
      else
      {
         print "<p />DEBUG INFORMATION:<br />PostgreSQL functions not available!<br />database_type = 'pgsql' in config.inc.php, are you using a different database? $DEBUG_TEXT";
         die();
      }
   }

   if ($link)
   {
      return $link;
   }
   else
   {
      print "DEBUG INFORMATION:<br />\n";
      print "Connect: Unable to connect to database<br />\n";
      print "<br />\n";
      print "Make sure that you have set the correct database type in the config.inc.php file<br />\n";
      print $DEBUG_TEXT;
      die();
   }
}



//
// db_query
// Action: Sends a query to the database and returns query result and number of rows
// Call: db_query (string query)
//
function db_query ($query)
{
   global $CONF;
   global $DEBUG_TEXT;
   $result = "";
   $number_rows = "";
   static $link;

   if (!is_resource($link)) $link = db_connect ();

   if ($CONF['database_type'] == "mysql") $result = @mysql_query ($query, $link) or die ("<p />DEBUG INFORMATION:<br />Invalid query: " . mysql_error($link) . "$DEBUG_TEXT");
   if ($CONF['database_type'] == "mysqli") $result = @mysqli_query ($link, $query) or die ("<p />DEBUG INFORMATION:<br />Invalid query: " . mysqli_error($link) . "$DEBUG_TEXT");
   if ($CONF['database_type'] == "pgsql")
   {
      $result = @pg_query ($link, $query) or die ("<p />DEBUG INFORMATION:<br />Invalid query: " . pg_last_error() . "$DEBUG_TEXT");
   }

   if (eregi ("^SELECT", $query))
   {
      // if $query was a SELECT statement check the number of rows with [database_type]_num_rows ().
      if ($CONF['database_type'] == "mysql") $number_rows = mysql_num_rows ($result);
      if ($CONF['database_type'] == "mysqli") $number_rows = mysqli_num_rows ($result);
      if ($CONF['database_type'] == "pgsql") $number_rows = pg_num_rows ($result);
   }
   else
   {
      // if $query was something else, UPDATE, DELETE or INSERT check the number of rows with
      // [database_type]_affected_rows ().
      if ($CONF['database_type'] == "mysql") $number_rows = mysql_affected_rows ($link);
      if ($CONF['database_type'] == "mysqli") $number_rows = mysqli_affected_rows ($link);
      if ($CONF['database_type'] == "pgsql") $number_rows = pg_affected_rows ($result);
   }

   $return = array (
      "result" => $result,
      "rows" => $number_rows
   );
   return $return;
}



// db_row
// Action: Returns a row from a table
// Call: db_row (int result)
//
function db_row ($result)
{
   global $CONF;
   $row = "";
   if ($CONF['database_type'] == "mysql") $row = mysql_fetch_row ($result);
   if ($CONF['database_type'] == "mysqli") $row = mysqli_fetch_row ($result);
   if ($CONF['database_type'] == "pgsql") $row = pg_fetch_row ($result);
   return $row;
}



// db_array
// Action: Returns a row from a table
// Call: db_array (int result)
//
function db_array ($result)
{
   global $CONF;
   $row = "";
   if ($CONF['database_type'] == "mysql") $row = mysql_fetch_array ($result);
   if ($CONF['database_type'] == "mysqli") $row = mysqli_fetch_array ($result);
   if ($CONF['database_type'] == "pgsql") $row = pg_fetch_array ($result);
   return $row;
}



// db_assoc
// Action: Returns a row from a table
// Call: db_assoc(int result)
//
function db_assoc ($result)
{
   global $CONF;
   $row = "";
   if ($CONF['database_type'] == "mysql") $row = mysql_fetch_assoc ($result);
   if ($CONF['database_type'] == "mysqli") $row = mysqli_fetch_assoc ($result);
   if ($CONF['database_type'] == "pgsql") $row = pg_fetch_assoc ($result);
   return $row;
}



//
// db_delete
// Action: Deletes a row from a specified table
// Call: db_delete (string table, string where, string delete)
//
function db_delete ($table,$where,$delete)
{
   $result = db_query ("DELETE FROM $table WHERE $where='$delete'");
   if ($result['rows'] >= 1)
   {
      return $result['rows'];
   }
   else
   {
      return true;
   }
}



//
// db_log
// Action: Logs actions from admin
// Call: db_log (string username, string domain, string action, string data)
//
function db_log ($username,$domain,$action,$data)
{
   global $CONF;
   global $table_log;
   $REMOTE_ADDR = $_SERVER['REMOTE_ADDR'];

   if ($CONF['logging'] == 'YES')
   {
      $result = db_query ("INSERT INTO $table_log (timestamp,username,domain,action,data) VALUES (NOW(),'$username ($REMOTE_ADDR)','$domain','$action','$data')");
      if ($result['rows'] != 1)
      {
         return false;
      }
      else
      {
         return true;
      }
   }
}



//
// table_by_key
// Action: Return table name for given key
// Call: table_by_key (string table_key)
//
function table_by_key ($table_key)
{
   global $CONF;
   $table = $CONF['database_prefix'].$CONF['database_tables'][$table_key];
   return $table;
}



//
// table_by_pos
// Action: Return table name for given position
// Call: table_by_pos (int pos)
//
function table_by_pos ($pos)
{
   global $CONF;
   $x=0;
   foreach($CONF['database_tables'] as $i=>$v)
   {
      if($pos==$x++) return table_by_key ($i);
   }
   return false;
}



/*
   Called after a mailbox has been created in the DBMS.
   Returns: boolean.
 */
function mailbox_postcreation($username,$domain,$maildir)
{
   if (empty($username) || empty($domain) || empty($maildir))
   {
      trigger_error('In '.__FUNCTION__.': empty username, domain and/or maildir parameter',E_USER_ERROR);
      return FALSE;
   }

   global $CONF;
   $confpar='mailbox_postcreation_script';

   if (!isset($CONF[$confpar]) || empty($CONF[$confpar])) return TRUE;

   $cmdarg1=escapeshellarg($username);
   $cmdarg2=escapeshellarg($domain);
   $cmdarg3=escapeshellarg($maildir);
   $command=$CONF[$confpar]." $cmdarg1 $cmdarg2 $cmdarg3";
   $retval=0;
   $output=array();
   $firstline='';
   $firstline=exec($command,$output,$retval);
   if (0!=$retval)
   {
      error_log("Running $command yielded return value=$retval, first line of output=$firstline");
      print '<p>WARNING: Problems running mailbox postcreation script!</p>';
      return FALSE;
   }

   return TRUE;
}

/*
   Called after a mailbox has been deleted in the DBMS.
   Returns: boolean.
 */
function mailbox_postdeletion($username,$domain)
{
   global $CONF;
   $confpar='mailbox_postdeletion_script';

   if (!isset($CONF[$confpar]) || empty($CONF[$confpar]))
   {
      return true;
   }

   if (empty($username) || empty($domain))
   {
      print '<p>Warning: empty username and/or domain parameter.</p>';
      return false;
   }

   $cmdarg1=escapeshellarg($username);
   $cmdarg2=escapeshellarg($domain);
   $command=$CONF[$confpar]." $cmdarg1 $cmdarg2";
   $retval=0;
   $output=array();
   $firstline='';
   $firstline=exec($command,$output,$retval);
   if (0!=$retval)
   {
      error_log("Running $command yielded return value=$retval, first line of output=$firstline");
      print '<p>WARNING: Problems running mailbox postdeletion script!</p>';
      return FALSE;
   }

   return TRUE;
}

/*
   Called after a domain has been deleted in the DBMS.
   Returns: boolean.
 */
function domain_postdeletion($domain)
{
   global $CONF;
   $confpar='domain_postdeletion_script';

   if (!isset($CONF[$confpar]) || empty($CONF[$confpar]))
   {
      return true;
   }

   if (empty($domain))
   {
      print '<p>Warning: empty domain parameter.</p>';
      return false;
   }

   $cmdarg1=escapeshellarg($domain);
   $command=$CONF[$confpar]." $cmdarg1";
   $retval=0;
   $output=array();
   $firstline='';
   $firstline=exec($command,$output,$retval);
   if (0!=$retval)
   {
      error_log("Running $command yielded return value=$retval, first line of output=$firstline");
      print '<p>WARNING: Problems running domain postdeletion script!</p>';
      return FALSE;
   }

   return TRUE;
}

/*
   Called by mailbox_postcreation() after a mailbox has been
   created. Immediately returns, unless configuration indicates
   that one or more sub-folders should be created.

   Triggers E_USER_ERROR if configuration error is detected.

   If IMAP login fails, the problem is logged to the system log
   (such as /var/log/httpd/error_log), and the function returns
   FALSE.

   Returns FALSE on all other errors, or TRUE if everything
   succeeds.

   Doesn't clean up, if only some of the folders could be
   created.
 */
function create_mailbox_subfolders($login,$cleartext_password)
{
   global $CONF;

   if (empty($login))
   {
      trigger_error('In '.__FUNCTION__.': empty $login',E_USER_ERROR);
      return FALSE;
   }

   if (!isset($CONF['create_mailbox_subdirs']) || empty($CONF['create_mailbox_subdirs'])) return TRUE;

   if (!is_array($CONF['create_mailbox_subdirs']))
   {
      trigger_error('create_mailbox_subdirs must be an array',E_USER_ERROR);
      return FALSE;
   }

   if (!isset($CONF['create_mailbox_subdirs_host']) || empty($CONF['create_mailbox_subdirs_host']))
   {
      trigger_error('An IMAP/POP server host ($CONF["create_mailbox_subdirs_host"]) must be configured, if sub-folders are to be created',E_USER_ERROR);
      return FALSE;
   }

   $s_host=$CONF['create_mailbox_subdirs_host'];
   $s_options='';
   $s_port='';

   if (
      isset($CONF['create_mailbox_subdirs_hostoptions'])
      && !empty($CONF['create_mailbox_subdirs_hostoptions'])
         ) {
            if (!is_array($CONF['create_mailbox_subdirs_hostoptions']))
            {
               trigger_error('The $CONF["create_mailbox_subdirs_hostoptions"] parameter must be an array',E_USER_ERROR);
               return FALSE;
            }
            foreach ($CONF['create_mailbox_subdirs_hostoptions'] as $o)
            {
               $s_options.='/'.$o;
            }
         }

   if (isset($CONF['create_mailbox_subdirs_hostport']) && !empty($CONF['create_mailbox_subdirs_hostport']))
   {
      $s_port=$CONF['create_mailbox_subdirs_hostport'];
      if (intval($s_port)!=$s_port)
      {
         trigger_error('The $CONF["create_mailbox_subdirs_hostport"] parameter must be an integer',E_USER_ERROR);
         return FALSE;
      }
      $s_port=':'.$s_port;
   }

   $s='{'.$s_host.$s_port.$s_options.'}';

   $i=@imap_open($s,$login,$cleartext_password);
   if (FALSE==$i)
   {
      error_log('Could not log into IMAP/POP server: '.imap_last_error());
      return FALSE;
   }

   foreach($CONF['create_mailbox_subdirs'] as $f)
   {
      $f='{'.$s_host.'}INBOX.'.$f;
      $res=imap_createmailbox($i,$f);
      if (!$res) {
         @imap_close($i);
         return FALSE;
      }
      @imap_subscribe($i,$f);
   }

   @imap_close($i);
   return TRUE;
}


//
// gen_show_status
// Action: Return a string of colored &nbsp;'s that indicate 
//         the if an alias goto has an error or is sent to
//         addresses list in show_custom_domains 
// Call: gen_show_status (string alias_address)
//
function gen_show_status ($show_alias)
{
   global $CONF, $table_alias;
   $stat_string = "";

   $stat_goto = "";
   $stat_result = db_query ("SELECT goto FROM $table_alias WHERE address='$show_alias'");
   if ($stat_result['rows'] > 0)
   {
      $row = db_row ($stat_result['result']);
      $stat_goto = $row[0];
   }

   // UNDELIVERABLE CHECK
   if ( $CONF['show_undeliverable'] == 'YES' )
   {
      $gotos=array();
      $gotos=explode(',',$stat_goto);
      $undel_string="";

      //make sure this alias goes somewhere known
      $stat_ok = 1;
      while ( ($g=array_pop($gotos)) && $stat_ok )
      {
         $stat_result = db_query ("SELECT address FROM $table_alias WHERE address = '$g'");
         if ($stat_result['rows'] == 0)
         {
            $stat_ok = 0;
         }
         if ( $stat_ok == 0 )
         {
            $stat_domain = substr($g,strpos($g,"@")+1);
            $stat_vacdomain = substr($stat_domain,strpos($stat_domain,"@")+1);
            if ( $stat_vacdomain == $CONF['vacation_domain'] )
            {
               $stat_ok = 1;
               break;
            }
            for ($i=0; $i < sizeof($CONF['show_undeliverable_exceptions']);$i++)
            {
               if ( $stat_domain == $CONF['show_undeliverable_exceptions'][$i] )
               {
                  $stat_ok = 1;
                  break;
               }
            }
         }
      } // while
      if ( $stat_ok == 0 )
      {
         $stat_string .= "<span style='background-color:" . $CONF['show_undeliverable_color'] .
            "'>" . $CONF['show_status_text'] . "</span>&nbsp;";
      }
      else
      {
         $stat_string .= $CONF['show_status_text'] . "&nbsp;";
      } 

   }
   else
   {
      $stat_string .= $CONF['show_status_text'] . "&nbsp;";
   } 

   // POP/IMAP CHECK
   if ( $CONF['show_popimap'] == 'YES' )
   {
      //if the address passed in appears in its own goto field, its POP/IMAP
      if (preg_match ('/^' . $show_alias . '$/', $stat_goto) ||
         preg_match ('/.*,' . $show_alias . ',.*$/', $stat_goto) ||
         preg_match ('/,' . $show_alias . '$/', $stat_goto) )
      {
         $stat_string .= "<span  style='background-color:" . $CONF['show_popimap_color'] .
            "'>" . $CONF['show_status_text'] . "</span>&nbsp;";
      }
      else
      {
         $stat_string .= $CONF['show_status_text'] . "&nbsp;";
      } 
   }

   // CUSTOM DESTINATION CHECK
   if ( $CONF['show_custom_count'] > 0 )
   {
      for ($i = 0; $i < sizeof ($CONF['show_custom_domains']); $i++)
      {
         if (preg_match ('/^.*' . $CONF['show_custom_domains'][$i] . '.*$/', $stat_goto))
         {
            $stat_string .= "<span  style='background-color:" . $CONF['show_custom_colors'][$i] .
               "'>" . $CONF['show_status_text'] . "</span>&nbsp;";
         }
         else
         {
            $stat_string .= $CONF['show_status_text'] . "&nbsp;";
         } 
      } 
   }
   else
   {
      $stat_string .= ";&nbsp;";
   } 

   //   $stat_string .= "<span style='background-color:green'> &nbsp; </span> &nbsp;" .
   //                  "<span style='background-color:blue'> &nbsp; </span> &nbsp;";
   return $stat_string;
}


$table_admin = table_by_key ('admin');
$table_alias = table_by_key ('alias');
$table_domain = table_by_key ('domain');
$table_domain_admins = table_by_key ('domain_admins');
$table_log = table_by_key ('log');
$table_mailbox = table_by_key ('mailbox');
$table_vacation = table_by_key ('vacation');
/* vim: set expandtab softtabstop=3 tabstop=3 shiftwidth=3: */