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functions.inc.php
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<?php
/**
* Postfix Admin
*
* LICENSE
* This source file is subject to the GPL license that is bundled with
* this package in the file LICENSE.TXT.
*
* Further details on the project are available at http://postfixadmin.sf.net
*
* @version $Id$
* @license GNU GPL v2 or later.
*
* File: functions.inc.php
* Contains re-usable code.
*/
$version = '3.1';
$min_db_version = 1837; # update (at least) before a release with the latest function numbrer in upgrade.php
/**
* check_session
* Action: Check if a session already exists, if not redirect to login.php
* Call: check_session ()
* @return String username (e.g. [email protected])
*/
function authentication_get_username() {
if (defined('POSTFIXADMIN_CLI')) {
return 'CLI';
}
if (defined('POSTFIXADMIN_SETUP')) {
return 'SETUP.PHP';
}
if (!isset($_SESSION['sessid'])) {
header ("Location: 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) {
if(isset($_SESSION['sessid'])) {
if(isset($_SESSION['sessid']['roles'])) {
if(in_array($role, $_SESSION['sessid']['roles'])) {
return true;
}
}
}
return false;
}
/**
* Used to enforce that $user has a particular role when
* viewing a page.
* If they are lacking a role, redirect them to login.php
*
* Note, user < admin < global-admin
*/
function authentication_require_role($role) {
// redirect to appropriate page?
if(authentication_has_role($role)) {
return True;
}
header("Location: login.php");
exit(0);
}
/**
* Initialize a user or admin session
*
* @param String $username the user or admin name
* @param boolean $is_admin true if the user is an admin, false otherwise
* @return boolean true on success
*/
function init_session($username, $is_admin = false) {
$status = session_regenerate_id(true);
$_SESSION['sessid'] = array();
$_SESSION['sessid']['roles'] = array();
$_SESSION['sessid']['roles'][] = $is_admin ? 'admin' : 'user';
$_SESSION['sessid']['username'] = $username;
$_SESSION['PFA_token'] = md5(uniqid(rand(), true));
return $status;
}
/**
* Add an error message for display on the next page that is rendered.
* @param String/Array message(s) to show.
*
* Stores string in session. Flushed through header template.
* @see _flash_string()
*/
function flash_error($string) {
_flash_string('error', $string);
}
/**
* Used to display an info message on successful update.
* @param String/Array message(s) to show.
* Stores data in session.
* @see _flash_string()
*/
function flash_info($string) {
_flash_string('info', $string);
}
/**
* 'Private' method used for flash_info() and flash_error().
*/
function _flash_string($type, $string) {
if (is_array($string)) {
foreach ($string as $singlestring) {
_flash_string($type, $singlestring);
}
return;
}
if(!isset($_SESSION['flash'])) {
$_SESSION['flash'] = array();
}
if(!isset($_SESSION['flash'][$type])) {
$_SESSION['flash'][$type] = array();
}
$_SESSION['flash'][$type][] = $string;
}
//
// check_language
// Action: checks what language the browser uses
// Call: check_language
// Parameter: $use_post - set to 0 if $_POST should NOT be read
//
function check_language ($use_post = 1) {
global $supported_languages; # from languages/languages.php
$lang = Config::read('default_language');
if(isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
$lang_array = preg_split ('/(\s*,\s*)/', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
if (safecookie('lang')) {
array_unshift($lang_array, safecookie('lang')); # prefer language from cookie
}
if ( $use_post && safepost('lang')) {
array_unshift($lang_array, safepost('lang')); # but prefer $_POST['lang'] even more
}
for($i = 0; $i < count($lang_array); $i++) {
$lang_next = $lang_array[$i];
$lang_next = strtolower(trim($lang_next));
$lang_next = preg_replace('/;.*$/', '', $lang_next); # remove things like ";q=0.8"
if(array_key_exists($lang_next, $supported_languages)) {
$lang = $lang_next;
break;
}
}
}
return $lang;
}
//
// language_selector
// Action: returns a language selector dropdown with the browser (or cookie) language preselected
// Call: language_selector()
//
function language_selector() {
global $supported_languages; # from languages/languages.php
$current_lang = check_language();
$selector = '<select name="lang" xml:lang="en" dir="ltr">';
foreach($supported_languages as $lang => $lang_name) {
if ($lang == $current_lang) {
$selected = ' selected="selected"';
} else {
$selected = '';
}
$selector .= "<option value='$lang'$selected>$lang_name</option>";
}
$selector .= "</select>";
return $selector;
}
/**
* Checks if a domain is valid
* @param string $domain
* @return empty string if the domain is valid, otherwise string with the errormessage
*
* TODO: make check_domain able to handle as example .local domains
* TODO: skip DNS check if the domain exists in PostfixAdmin?
*/
function check_domain ($domain) {
if (!preg_match ('/^([-0-9A-Z]+\.)+' . '([-0-9A-Z]){2,13}$/i', ($domain))) {
return sprintf(Config::lang('pInvalidDomainRegex'), htmlentities($domain));
}
if (Config::bool('emailcheck_resolve_domain') && 'WINDOWS'!=(strtoupper(substr(php_uname('s'), 0, 7)))) {
// Look for an AAAA, A, or MX record for the domain
if(function_exists('checkdnsrr')) {
$start = microtime(true); # check for slow nameservers, part 1
// AAAA (IPv6) is only available in PHP v. >= 5
if (version_compare(phpversion(), "5.0.0", ">=") && checkdnsrr($domain,'AAAA')) {
$retval = '';
} elseif (checkdnsrr($domain,'A')) {
$retval = '';
} elseif (checkdnsrr($domain,'MX')) {
$retval = '';
} else {
$retval = sprintf(Config::lang('pInvalidDomainDNS'), htmlentities($domain));
}
$end = microtime(true); # check for slow nameservers, part 2
$time_needed = $end - $start;
if ($time_needed > 2) {
error_log("Warning: slow nameserver - lookup for $domain took $time_needed seconds");
}
return $retval;
} else {
return 'emailcheck_resolve_domain is enabled, but function (checkdnsrr) missing!';
}
}
return '';
}
/**
* check_email
* Checks if an email is valid - if it is, return true, else false.
* @param String $email - a string that may be an email address.
* @return empty string if it's a valid email address, otherwise string with the errormessage
* TODO: make check_email able to handle already added domains
*/
function check_email ($email) {
$ce_email=$email;
//strip the vacation domain out if we are using it
//and change from blah#[email protected] to [email protected]
if (Config::bool('vacation')) {
$vacation_domain = Config::read('vacation_domain');
$ce_email = preg_replace("/@$vacation_domain\$/", '', $ce_email);
$ce_email = preg_replace("/#/", '@', $ce_email);
}
// Perform non-domain-part sanity checks
if (!preg_match ('/^[-!#$%&\'*+\\.\/0-9=?A-Z^_{|}~]+' . '@' . '[^@]+$/i', $ce_email)) {
return Config::lang_f('pInvalidMailRegex', $email);
}
// Determine domain name
$matches=array();
if (!preg_match('|@(.+)$|',$ce_email,$matches)) {
return Config::lang_f('pInvalidMailRegex', $email);
}
$domain=$matches[1];
# check domain name
return check_domain($domain);
}
/**
* Clean a string, escaping any meta characters that could be
* used to disrupt an SQL string. i.e. "'" => "\'" etc.
*
* @param mixed string|array
* @return String (or Array) of cleaned data, suitable for use within an SQL
* statement.
*/
function escape_string ($string) {
global $CONF;
// if the string is actually an array, do a recursive cleaning.
// Note, the array keys are not cleaned.
if(is_array($string)) {
$clean = array();
foreach(array_keys($string) as $row) {
$clean[$row] = escape_string($string[$row]);
}
return $clean;
}
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 (db_sqlite()) {
$escaped_string = SQLite3::escapeString($string);
}
if (db_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;
}
/**
* safeget
* Action: get value from $_GET[$param], or $default if $_GET[$param] is not set
* Call: $param = safeget('param') # replaces $param = $_GET['param']
* - or -
* $param = safeget('param', 'default')
*
* @param String parameter name.
* @param String (optional) - default value if key is not set.
* @return String
*/
function safeget ($param, $default="") {
$retval=$default;
if (isset($_GET[$param])) $retval=$_GET[$param];
return $retval;
}
/**
* safepost - similar to safeget()
* @see safeget()
* @param String parameter name
* @param String (optional) default value (defaults to "")
* @return String - value in $_POST[$param] or $default
* same as safeget, but for $_POST
*/
function safepost ($param, $default="") {
$retval=$default;
if (isset($_POST[$param])) $retval=$_POST[$param];
return $retval;
}
/**
* safeserver
* @see safeget()
* @param String $param
* @param String $default (optional)
* @return String value from $_SERVER[$param] or $default
*/
function safeserver ($param, $default="") {
$retval=$default;
if (isset($_SERVER[$param])) $retval=$_SERVER[$param];
return $retval;
}
/**
* safecookie
* @see safeget()
* @param String $param
* @param String $default (optional)
* @return String value from $_COOKIE[$param] or $default
*/
function safecookie ($param, $default="") {
$retval=$default;
if (isset($_COOKIE[$param])) $retval=$_COOKIE[$param];
return $retval;
}
/**
* safesession
* @see safeget()
* @param String $param
* @param String $default (optional)
* @return String value from $_SESSION[$param] or $default
*/
function safesession ($param, $default="") {
$retval=$default;
if (isset($_SESSION[$param])) $retval=$_SESSION[$param];
return $retval;
}
/**
* pacol
* @param int $allow_editing
* @param int $display_in_form
* @param int display_in_list
* @param String $type
* @param String PALANG_label
* @param String PALANG_desc
* @param any optional $default
* @param array optional $options
* @param int or $not_in_db - if array, can contain the remaining parameters as associated array
* @param ...
* @return array for $struct
*/
function pacol($allow_editing, $display_in_form, $display_in_list, $type, $PALANG_label, $PALANG_desc, $default = "", $options = array(), $multiopt=0, $dont_write_to_db=0, $select="", $extrafrom="", $linkto="") {
if ($PALANG_label != '') $PALANG_label = Config::lang($PALANG_label);
if ($PALANG_desc != '') $PALANG_desc = Config::lang($PALANG_desc );
if (is_array($multiopt)) { # remaining parameters provided in named array
$not_in_db = 0; # keep default value
foreach ($multiopt as $key => $value) {
$$key = $value; # extract everything to the matching variable
}
} else {
$not_in_db = $multiopt;
}
return array(
'editable' => $allow_editing,
'display_in_form' => $display_in_form,
'display_in_list' => $display_in_list,
'type' => $type,
'label' => $PALANG_label, # $PALANG field label
'desc' => $PALANG_desc, # $PALANG field description
'default' => $default,
'options' => $options,
'not_in_db' => $not_in_db,
'dont_write_to_db' => $dont_write_to_db,
'select' => $select, # replaces the field name after SELECT
'extrafrom' => $extrafrom, # added after FROM xy - useful for JOINs etc.
'linkto' => $linkto, # make the value a link - %s will be replaced with the ID
);
}
//
// get_domain_properties
// Action: Get all the properties of a domain.
// Call: get_domain_properties (string domain)
//
function get_domain_properties ($domain) {
$handler = new DomainHandler();
if (!$handler->init($domain)) {
die("Error: " . join("\n", $handler->errormsg));
}
if (!$handler->view()) {
die("Error: " . join("\n", $handler->errormsg));
}
$result = $handler->result();
return $result;
}
/**
* create_page_browser
* Action: Get page browser for a long list of mailboxes, aliases etc.
* Call: $pagebrowser = create_page_browser('table.field', 'query', 50) # replaces $param = $_GET['param']
*
* @param String idxfield - database field name to use as title
* @param String query - core part of the query (starting at "FROM")
* @return String
*/
function create_page_browser($idxfield, $querypart) {
global $CONF;
$page_size = (int) $CONF['page_size'];
$label_len = 2;
$pagebrowser = array();
if ($page_size < 2) { # will break the page browser
die('$CONF[\'page_size\'] must be 2 or more!');
}
# get number of rows
$query = "SELECT count(*) as counter FROM (SELECT $idxfield $querypart) AS tmp";
$result = db_query ($query);
if ($result['rows'] > 0) {
$row = db_array ($result['result']);
$count_results = $row['counter'] -1; # we start counting at 0, not 1
}
# echo "<p>rows: " . ($count_results +1) . " --- $query";
if ($count_results < $page_size) {
return array(); # only one page - no pagebrowser required
}
# init row counter
$initcount = "SET @row=-1";
if (db_pgsql()) {
$initcount = "CREATE TEMPORARY SEQUENCE rowcount MINVALUE 0";
}
if (!db_sqlite()) {
$result = db_query($initcount);
}
# get labels for relevant rows (first and last of each page)
$page_size_zerobase = $page_size - 1;
$query = "
SELECT * FROM (
SELECT $idxfield AS label, @row := @row + 1 AS row $querypart
) idx WHERE MOD(idx.row, $page_size) IN (0,$page_size_zerobase) OR idx.row = $count_results
";
if (db_pgsql()) {
$query = "
SELECT * FROM (
SELECT $idxfield AS label, nextval('rowcount') AS row $querypart
) idx WHERE MOD(idx.row, $page_size) IN (0,$page_size_zerobase) OR idx.row = $count_results
";
}
if (db_sqlite()) {
$query = "
WITH idx AS (SELECT * $querypart)
SELECT $idxfield AS label, (SELECT (COUNT(*) - 1) FROM idx t1 WHERE t1.$idxfield <= t2.$idxfield) AS row
FROM idx t2
WHERE (row % $page_size) IN (0,$page_size_zerobase) OR row = $count_results";
}
# echo "<p>$query";
# TODO: $query is MySQL-specific
# PostgreSQL:
# http://www.postgresql.org/docs/8.1/static/sql-createsequence.html
# http://www.postgresonline.com/journal/archives/79-Simulating-Row-Number-in-PostgreSQL-Pre-8.4.html
# http://www.pg-forum.de/sql/1518-nummerierung-der-abfrageergebnisse.html
# CREATE TEMPORARY SEQUENCE foo MINVALUE 0 MAXVALUE $page_size_zerobase CYCLE
# afterwards: DROP SEQUENCE foo
$result = db_query ($query);
if ($result['rows'] > 0) {
while ($row = db_array ($result['result'])) {
if ($row2 = db_array ($result['result'])) {
$label = substr($row['label'],0,$label_len) . '-' . substr($row2['label'],0,$label_len);
$pagebrowser[] = $label;
} else { # only one row remaining
$label = substr($row['label'],0,$label_len);
$pagebrowser[] = $label;
}
}
}
if (db_pgsql()) {
db_query ("DROP SEQUENCE rowcount");
}
return $pagebrowser;
}
//
// divide_quota
// Action: Recalculates the quota from MBs to bytes (divide, /)
// Call: divide_quota (string $quota)
//
function divide_quota ($quota) {
if ($quota == -1) return $quota;
$value = round($quota / Config::read('quota_multiplier'),2);
return $value;
}
//
// check_owner
// Action: Checks if the admin is the owner of the domain (or global-admin)
// Call: check_owner (string admin, string domain)
//
function check_owner ($username, $domain) {
$table_domain_admins = table_by_key('domain_admins');
$E_username = escape_string($username);
$E_domain = escape_string($domain);
$result = db_query ("SELECT 1 FROM $table_domain_admins WHERE username='$E_username' AND (domain='$E_domain' OR domain='ALL') AND active='1'");
if ($result['rows'] == 1 || $result['rows'] == 2) { # "ALL" + specific domain permissions is possible
# TODO: if superadmin, check if given domain exists in the database
return true;
} else {
if ($result['rows'] > 2) { # more than 2 results means something really strange happened...
flash_error("Permission check returned multiple results. Please go to 'edit admin' for your username and press the save "
. "button once to fix the database. If this doesn't help, open a bugreport.");
}
return false;
}
}
/**
* List domains for an admin user.
* @param String $username
* @return array of domain names.
*/
function list_domains_for_admin ($username) {
$table_domain = table_by_key('domain');
$table_domain_admins = table_by_key('domain_admins');
$E_username = escape_string($username);
$query = "SELECT $table_domain.domain FROM $table_domain ";
$condition[] = "$table_domain.domain != 'ALL'";
$result = db_query ("SELECT username FROM $table_domain_admins WHERE username='$E_username' AND domain='ALL'");
if ($result['rows'] < 1) { # not a superadmin
$query .= " LEFT JOIN $table_domain_admins ON $table_domain.domain=$table_domain_admins.domain ";
$condition[] = "$table_domain_admins.username='$E_username' ";
$condition[] = "$table_domain.active='" . db_get_boolean(true) . "'"; # TODO: does it really make sense to exclude inactive...
$condition[] = "$table_domain.backupmx='" . db_get_boolean(False) . "'"; # TODO: ... and backupmx domains for non-superadmins?
}
$query .= " WHERE " . join(' AND ', $condition);
$query .= " ORDER BY $table_domain.domain";
$list = array ();
$result = db_query ($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 () {
$list = array();
$table_domain = table_by_key('domain');
$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;
}
//
// list_admins
// Action: Lists all the admins
// Call: list_admins ()
//
// was admin_list_admins
//
function list_admins () {
$handler = new AdminHandler();
$handler->getList('');
return $handler->result();
}
//
// encode_header
// Action: Encode a string according to RFC 1522 for use in headers if it contains 8-bit characters.
// Call: encode_header (string header, string charset)
//
function encode_header ($string, $default_charset = "utf-8") {
if (strtolower ($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;
# end switch
}
}
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 () {
// length of the generated password
$length = 12;
// define possible characters
$possible = "2345678923456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ"; # skip 0 and 1 to avoid confusion with O and l
// add random characters to $password until $length is reached
$password = "";
while (strlen($password) < $length) {
// pick a random character from the possible ones
$char = substr($possible, mt_rand(0, strlen($possible)-1), 1);
// we don't want this character if it's already in the password
if (!strstr($password, $char)) {
$password .= $char;
}
}
return $password;
}
/**
* Check if a password is strong enough based on the conditions in $CONF['password_validation']
* @param String $password
* @return array of error messages, or empty array if the password is ok
*/
function validate_password($password) {
$val_conf = Config::read('password_validation');
$result = array();
$minlen = (int) Config::read('min_password_length'); # used up to 2.3.x - check it for backward compatibility
if ($minlen > 0) {
$val_conf['/.{' . $minlen . '}/'] = "password_too_short $minlen";
}
foreach ($val_conf as $regex => $message) {
if (!preg_match($regex, $password)) {
$msgparts = preg_split("/ /", $message, 2);
if (count($msgparts) == 1) {
$result[] = Config::lang($msgparts[0]);
} else {
$result[] = sprintf(Config::lang($msgparts[0]), $msgparts[1]);
}
}
}
return $result;
}
/**
* Encrypt a password, using the apparopriate hashing mechanism as defined in
* config.inc.php ($CONF['encrypt']).
* When wanting to compare one pw to another, it's necessary to provide the salt used - hence
* the second parameter ($pw_db), which is the existing hash from the DB.
*
* @param string $pw
* @param string $encrypted password
* @return string encrypted password.
*/
function pacrypt ($pw, $pw_db="") {
global $CONF;
$password = "";
$salt = "";
if ($CONF['encrypt'] == 'md5crypt') {
$split_salt = preg_split ('/\$/', $pw_db);
if (isset ($split_salt[2])) {
$salt = $split_salt[2];
}
$password = md5crypt ($pw, $salt);
}
elseif ($CONF['encrypt'] == 'md5') {
$password = md5($pw);
}
elseif ($CONF['encrypt'] == 'system') {
if ($pw_db) {
$password = crypt($pw, $pw_db);
} else {
$password = crypt($pw);
}
}
elseif ($CONF['encrypt'] == 'cleartext') {
$password = $pw;
}
// See https://sourceforge.net/tracker/?func=detail&atid=937966&aid=1793352&group_id=191583
// this is apparently useful for pam_mysql etc.
elseif ($CONF['encrypt'] == 'mysql_encrypt') {
$pw = escape_string($pw);
if ($pw_db!="") {
$salt=escape_string(substr($pw_db,0,2));
$res=db_query("SELECT ENCRYPT('".$pw."','".$salt."');");
} else {
$res=db_query("SELECT ENCRYPT('".$pw."');");
}
$l = db_row($res["result"]);
$password = $l[0];
}
elseif ($CONF['encrypt'] == 'authlib') {
$flavor = $CONF['authlib_default_flavor'];
$salt = substr(create_salt(), 0, 2); # courier-authlib supports only two-character salts
if(preg_match('/^{.*}/', $pw_db)) {
// we have a flavor in the db -> use it instead of default flavor
$result = preg_split('/[{}]/', $pw_db, 3); # split at { and/or }
$flavor = $result[1];
$salt = substr($result[2], 0, 2);
}
if(stripos($flavor, 'md5raw') === 0) {
$password = '{' . $flavor . '}' . md5($pw);
} elseif(stripos($flavor, 'md5') === 0) {
$password = '{' . $flavor . '}' . base64_encode(md5($pw, TRUE));
} elseif(stripos($flavor, 'crypt') === 0) {
$password = '{' . $flavor . '}' . crypt($pw, $salt);
} elseif(stripos($flavor, 'SHA') === 0) {
$password = '{' . $flavor . '}' . base64_encode(sha1($pw, TRUE));
} else {
die("authlib_default_flavor '" . $flavor . "' unknown. Valid flavors are 'md5raw', 'md5', 'SHA' and 'crypt'");
}
}
elseif (preg_match("/^dovecot:/", $CONF['encrypt'])) {
$split_method = preg_split ('/:/', $CONF['encrypt']);
$method = strtoupper($split_method[1]);
# If $pw_db starts with {method}, change $method accordingly
if (!empty($pw_db) && preg_match('/^\{([A-Z0-9.-]+)\}.+/', $pw_db, $method_matches)) { $method = $method_matches[1]; }
if (! preg_match("/^[A-Z0-9.-]+$/", $method)) { die("invalid dovecot encryption method"); } # TODO: check against a fixed list?
# if (strtolower($method) == 'md5-crypt') die("\$CONF['encrypt'] = 'dovecot:md5-crypt' will not work because dovecotpw generates a random salt each time. Please use \$CONF['encrypt'] = 'md5crypt' instead.");
# $crypt_method = preg_match ("/.*-CRYPT$/", $method);
# digest-md5 and SCRAM-SHA-1 hashes include the username - until someone implements it, let's declare it as unsupported
if (strtolower($method) == 'digest-md5') die("Sorry, \$CONF['encrypt'] = 'dovecot:digest-md5' is not supported by PostfixAdmin.");
if (strtoupper($method) == 'SCRAM-SHA-1') die("Sorry, \$CONF['encrypt'] = 'dovecot:scram-sha-1' is not supported by PostfixAdmin.");
# TODO: add -u option for those hashes, or for everything that is salted (-u was available before dovecot 2.1 -> no problem with backward compability)
$dovecotpw = "doveadm pw";
if (!empty($CONF['dovecotpw'])) $dovecotpw = $CONF['dovecotpw'];
# Use proc_open call to avoid safe_mode problems and to prevent showing plain password in process table
$spec = array(
0 => array("pipe", "r"), // stdin
1 => array("pipe", "w"), // stdout
2 => array("pipe", "w"), // stderr
);
$nonsaltedtypes = "SHA|SHA1|SHA256|SHA512|CLEAR|CLEARTEXT|PLAIN|PLAIN-TRUNC|CRAM-MD5|HMAC-MD5|PLAIN-MD4|PLAIN-MD5|LDAP-MD5|LANMAN|NTLM|RPA";
$salted = ! preg_match("/^($nonsaltedtypes)(\.B64|\.BASE64|\.HEX)?$/", strtoupper($method) );
$dovepasstest = '';
if ( $salted && (!empty($pw_db)) ) {
# only use -t for salted passwords to be backward compatible with dovecot < 2.1
$dovepasstest = " -t " . escapeshellarg($pw_db);
}
$pipe = proc_open("$dovecotpw '-s' $method$dovepasstest", $spec, $pipes);
if (!$pipe) {
die("can't proc_open $dovecotpw");
} else {
// use dovecot's stdin, it uses getpass() twice (except when using -t)
// Write pass in pipe stdin
if (empty($dovepasstest)) {
fwrite($pipes[0], $pw . "\n", 1+strlen($pw)); usleep(1000);
}
fwrite($pipes[0], $pw . "\n", 1+strlen($pw));
fclose($pipes[0]);
// Read hash from pipe stdout
$password = fread($pipes[1], "200");