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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
*
* @license GNU GPL v2 or later.
*
* File: functions.inc.php
* Contains re-usable code.
*/
$min_db_version = 1844; # update (at least) before a release with the latest function numbrer in upgrade.php
/**
* check_session
* Action: Check if a session already exists, if not redirect to login.php
* Call: check_session ()
* @return String username (e.g. [email protected])
*/
function authentication_get_username()
{
if (defined('POSTFIXADMIN_CLI')) {
return 'CLI';
}
if (defined('POSTFIXADMIN_SETUP')) {
return 'SETUP.PHP';
}
if (!isset($_SESSION['sessid'])) {
header("Location: login.php");
exit(0);
}
$SESSID_USERNAME = $_SESSION['sessid']['username'];
return $SESSID_USERNAME;
}
/**
* Returns the type of user - either 'user' or 'admin'
* Returns false if neither (E.g. if not logged in)
* @return string|bool admin or user or (boolean) false.
*/
function authentication_get_usertype()
{
if (isset($_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 $role role-name. (E.g. admin, global-admin or user)
* @return boolean True if they have the requested role in their session.
* Note, user < admin < global-admin
*/
function authentication_has_role($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
* @param string $role
* @return bool
*/
function authentication_require_role($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(random_bytes(8) . uniqid('pfa', true));
return $status;
}
/**
* Add an error message for display on the next page that is rendered.
* @param string|array $string message(s) to show.
*
* Stores string in session. Flushed through header template.
* @return void
* @see _flash_string()
*/
function flash_error($string)
{
_flash_string('error', $string);
}
/**
* Used to display an info message on successful update.
* @param string|array $string message(s) to show.
* Stores data in session.
* @return void
* @see _flash_string()
*/
function flash_info($string)
{
_flash_string('info', $string);
}
/**
* 'Private' method used for flash_info() and flash_error().
* @param string $type
* @param array|string $string
* @retrn void
*/
function _flash_string($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;
}
/**
* @param bool $use_post - set to 0 if $_POST should NOT be read
* @return string e.g en
* Try to figure out what language the user wants based on browser / cookie
*/
function check_language($use_post = true)
{
global $supported_languages; # from languages/languages.php
// prefer a $_POST['lang'] if present
if ($use_post && safepost('lang')) {
$lang = safepost('lang');
if (is_string($lang) && array_key_exists($lang, $supported_languages)) {
return $lang;
}
}
// Failing that, is there a $_COOKIE['lang'] ?
if (safecookie('lang')) {
$lang = safecookie('lang');
if (is_string($lang) && array_key_exists($lang, $supported_languages)) {
return $lang;
}
}
$lang = Config::read_string('default_language');
// If not, did the browser give us any hint(s)?
if (!empty($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
$lang_array = preg_split('/(\s*,\s*)/', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
foreach ($lang_array as $value) {
$lang_next = strtolower(trim($value));
$lang_next = preg_replace('/;.*$/', '', $lang_next); # remove things like ";q=0.8"
if (array_key_exists($lang_next, $supported_languages)) {
return $lang_next;
}
}
}
return $lang;
}
/**
* Action: returns a language selector dropdown with the browser (or cookie) language preselected
* @return string
*
*
*/
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 $domain
* @return string empty if the domain is valid, otherwise string with the errormessage
*
* @todo make check_domain able to handle as example .local domains
* @todo skip DNS check if the domain exists in PostfixAdmin?
*/
function check_domain($domain)
{
if (!preg_match('/^([-0-9A-Z]+\.)+' . '([-0-9A-Z]){1,13}$/i', ($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')) {
$retval = '';
} elseif (checkdnsrr($domain, 'NS')) {
error_log("DNS is not correctly configured for $domain to send or receive email");
$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 '';
}
/**
* Get password expiration value for a domain
* @param string $domain - a string that may be a domain
* @return int password expiration value for this domain (DAYS, or zero if not enabled)
*/
function get_password_expiration_value($domain)
{
$table_domain = table_by_key('domain');
$query = "SELECT password_expiry FROM $table_domain WHERE domain= :domain";
$result = db_query_one($query, array('domain' => $domain));
if (is_array($result) && isset($result['password_expiry'])) {
return $result['password_expiry'];
}
return 0;
}
/**
* check_email
* Checks if an email is valid - if it is, return true, else false.
* @param string $email - a string that may be an email address.
* @return string empty if it's a valid email address, otherwise string with the errormessage
* @todo make check_email able to handle already added domains
*/
function check_email($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_string('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);
}
if (function_exists('filter_var')) {
$check = filter_var($email, FILTER_VALIDATE_EMAIL);
if (!$check) {
return "" . Config::lang_f('pInvalidMailRegex', $email);
}
}
// Determine domain name
$matches = array();
if (preg_match('|@(.+)$|', $ce_email, $matches)) {
$domain = $matches[1];
# check domain name
return "" . check_domain($domain);
}
return "" . Config::lang_f('pInvalidMailRegex', $email);
}
/**
* Clean a string, escaping any meta characters that could be
* used to disrupt an SQL string. The method of the escaping is dependent on the underlying DB
* and MAY NOT be just \' ing. (e.g. sqlite and PgSQL change "it's" to "it''s".
*
* The PDO quote function surrounds what you pass in with quote marks; for legacy reasons we remove these,
* but assume the caller will actually add them back in (!).
*
* e.g. caller code looks like :
*
* <code>
* $sql = "SELECT * FROM foo WHERE x = '" . escape_string('fish') . "'";
* </code>
*
* @param int|string $string_or_int parameters to escape
* @return string cleaned data, suitable for use within an SQL statement.
*/
function escape_string($string_or_int)
{
$link = db_connect();
$string_or_int = (string)$string_or_int;
$quoted = $link->quote($string_or_int);
return trim($quoted, "'");
}
/**
* 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 $param parameter name.
* @param string $default (optional) - default value if key is not set.
* @return string
*/
function safeget($param, $default = "")
{
$retval = $default;
if (isset($_GET[$param]) && is_string($_GET[$param])) {
$retval = $_GET[$param];
}
return $retval;
}
/**
* safepost - similar to safeget() but for $_POST
* @param string $param parameter name
* @param string $default (optional) default value (defaults to "")
* @return string - value in $_POST[$param] or $default
* @see safeget()
*/
function safepost($param, $default = "")
{
$retval = $default;
if (isset($_POST[$param]) && is_string($_POST[$param])) {
$retval = $_POST[$param];
}
return $retval;
}
/**
* safecookie
* @param string $param
* @param string $default (optional)
* @return string value from $_COOKIE[$param] or $default
* @see safeget()
*/
function safecookie($param, $default = "")
{
$retval = $default;
if (isset($_COOKIE[$param])) {
$retval = $_COOKIE[$param];
}
return $retval;
}
/**
* safesession
* @param string $param
* @param string $default (optional)
* @return string value from $_SESSION[$param] or $default
* @see safeget()
*/
function safesession($param, $default = "")
{
$retval = $default;
if (isset($_SESSION[$param]) && is_string($_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 $options optional options
* @param int or $not_in_db - if array, can contain the remaining parameters as associated array. Otherwise counts as $not_in_db
* @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
);
}
/**
* Action: Get all the properties of a domain.
* @param string $domain
* @return array
*/
function get_domain_properties($domain)
{
$handler = new DomainHandler();
if (!$handler->init($domain)) {
throw new Exception("Error: " . join("\n", $handler->errormsg));
}
if (!$handler->view()) {
throw new Exception("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.
*
* @param string $idxfield - database field name to use as title e.g. alias.address
* @param string $querypart - core part of the query (starting at "FROM") e.g. FROM alias WHERE address like ...
* @return array
*/
function create_page_browser($idxfield, $querypart, $sql_params = [])
{
global $CONF;
$page_size = (int)$CONF['page_size'];
$label_len = 2;
$pagebrowser = array();
$count_results = 0;
if ($page_size < 2) { # will break the page browser
throw new Exception('$CONF[\'page_size\'] must be 2 or more!');
}
# get number of rows
$query = "SELECT count(*) as counter FROM (SELECT $idxfield $querypart) AS tmp";
$result = db_query_one($query, $sql_params);
if ($result && isset($result['counter'])) {
$count_results = $result['counter'] - 1; # we start counting at 0, not 1
}
if ($count_results < $page_size) {
return array(); # only one page - no pagebrowser required
}
# init row counter
$initcount = "SET @r=-1";
if (db_pgsql()) {
$initcount = "CREATE TEMPORARY SEQUENCE rowcount MINVALUE 0";
}
if (!db_sqlite()) {
db_execute($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, @r := @r + 1 AS 'r' $querypart
) idx WHERE MOD(idx.r, $page_size) IN (0,$page_size_zerobase) OR idx.r = $count_results
";
if (db_pgsql()) {
$query = "
SELECT * FROM (
SELECT $idxfield AS label, nextval('rowcount') AS r $querypart
) idx WHERE MOD(idx.r, $page_size) IN (0,$page_size_zerobase) OR idx.r = $count_results
";
}
if (db_sqlite()) {
$end = $idxfield;
if (strpos($idxfield, '.') !== false) {
$bits = explode('.', $idxfield);
$end = $bits[1];
}
$query = "
WITH idx AS (SELECT * $querypart)
SELECT $end AS label, (SELECT (COUNT(*) - 1) FROM idx t1 WHERE t1.$end <= t2.$end ) AS r
FROM idx t2
WHERE (r % $page_size) IN (0,$page_size_zerobase) OR r = $count_results";
}
# 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
$result = db_query_all($query, $sql_params);
for ($k = 0; $k < count($result); $k += 2) {
if (isset($result[$k + 1])) {
$label = substr($result[$k]['label'], 0, $label_len) . '-' . substr($result[$k + 1]['label'], 0, $label_len);
} else {
$label = substr($result[$k]['label'], 0, $label_len);
}
$pagebrowser[] = $label;
}
if (db_pgsql()) {
db_execute("DROP SEQUENCE rowcount");
}
return $pagebrowser;
}
/**
* Recalculates the quota from MBs to bytes (divide, /)
* @param int $quota
* @return float
*/
function divide_quota($quota)
{
if ($quota == -1) {
return $quota;
}
$value = round($quota / (int)Config::read_string('quota_multiplier'), 2);
return $value;
}
/**
* Checks if the admin is the owner of the domain (or global-admin)
* @param string $username
* @param string $domain
* @return bool
*/
function check_owner($username, $domain)
{
$table_domain_admins = table_by_key('domain_admins');
$result = db_query_all(
"SELECT 1 FROM $table_domain_admins WHERE username= ? AND (domain = ? OR domain = 'ALL') AND active = ?",
array($username, $domain, db_get_boolean(true))
);
if (sizeof($result) == 1 || sizeof($result) == 2) { # "ALL" + specific domain permissions is possible
# TODO: if superadmin, check if given domain exists in the database
return true;
} else {
if (sizeof($result) > 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');
$condition = array();
$E_username = escape_string($username);
$query = "SELECT $table_domain.domain FROM $table_domain ";
$condition[] = "$table_domain.domain != 'ALL'";
$pvalues = array();
$result = db_query_one("SELECT username FROM $table_domain_admins WHERE username= :username AND domain='ALL'", array('username' => $username));
if (empty($result)) { # not a superadmin
$pvalues['username'] = $username;
$pvalues['active'] = db_get_boolean(true);
$pvalues['backupmx'] = db_get_boolean(false);
$query .= " LEFT JOIN $table_domain_admins ON $table_domain.domain=$table_domain_admins.domain ";
$condition[] = "$table_domain_admins.username = :username ";
$condition[] = "$table_domain.active = :active "; # TODO: does it really make sense to exclude inactive...
$condition[] = "$table_domain.backupmx = :backupmx"; # TODO: ... and backupmx domains for non-superadmins?
}
$query .= " WHERE " . join(' AND ', $condition);
$query .= " ORDER BY $table_domain.domain";
$result = db_query_all($query, $pvalues);
return array_column($result, 'domain');
}
/**
* List all available domains.
*
* @return array
*/
function list_domains()
{
$list = array();
$table_domain = table_by_key('domain');
$result = db_query_all("SELECT domain FROM $table_domain WHERE domain!='ALL' ORDER BY domain");
$i = 0;
foreach ($result as $row) {
$list[$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 a random password of $length characters.
* @param int $length (optional, default: 12)
* @return string
*
*/
function generate_password($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) {
$random = random_int(0, strlen($possible) - 1);
$char = substr($possible, $random, 1);
// we don't want this character if it's already in the password
if (!strstr($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)
{
$result = array();
$config = Config::getInstance()->getAll();
$val_conf = $config['password_validation'] ?? [];
$minlen = $config['min_password_length'] ?? null;
if (is_numeric($minlen) && $minlen > 0) {
$minlen = (int)$minlen; # used up to 2.3.x -
$val_conf['/.{' . $minlen . '}/'] = "password_too_short $minlen";
}
foreach ($val_conf as $regex => $message) {
if (is_callable($message)) {
$ret = $message($password);
if (!empty($ret)) {
$result[] = $ret;
}
continue;
}
if (!preg_match($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;
}
/**
* @param string $pw
* @param string $pw_db - encrypted hash
* @return string crypt'ed password, should equal $pw_db if $pw matches the original
* @deprecated
*/
function _pacrypt_md5crypt($pw, $pw_db = '')
{
if ($pw_db) {
$split_salt = preg_split('/\$/', $pw_db);
if (isset($split_salt[2])) {
$salt = $split_salt[2];
return md5crypt($pw, $salt);
}
}
return md5crypt($pw);
}
/**
* @todo fix this to not throw an E_NOTICE or deprecate/remove.
* @deprecated
*/
function _pacrypt_crypt($pw, $pw_db = '')
{
if ($pw_db) {
return crypt($pw, $pw_db);
}
// PHP8 - we have to specify a salt here....
$salt = substr(str_shuffle('0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'), 0, 2);
return crypt($pw, $salt);
}
/**
* Crypt with MySQL's ENCRYPT function
*
* @param string $pw
* @param string $pw_db (hashed password)
* @return string if $pw_db and the return value match then $pw matches the original password.
*/
function _pacrypt_mysql_encrypt($pw, $pw_db = '')
{
// See https://sourceforge.net/tracker/?func=detail&atid=937966&aid=1793352&group_id=191583
// this is apparently useful for pam_mysql etc.
if ($pw_db) {
$res = db_query_one("SELECT ENCRYPT(:pw,:pw_db) as result", ['pw' => $pw, 'pw_db' => $pw_db]);
} else {
// see https://security.stackexchange.com/questions/150687/is-it-safe-to-use-the-encrypt-function-in-mysql-to-hash-passwords
// if no existing password, use a random SHA512 salt.
$salt = _php_crypt_generate_crypt_salt();
$res = db_query_one("SELECT ENCRYPT(:pw, CONCAT('$6$', '$salt')) as result", ['pw' => $pw]);
}
return $res['result'];
}
/**
* Create/Validate courier authlib style crypt'ed passwords. (md5, md5raw, crypt, sha1)
*
* @param string $pw
* @param string $pw_db (optional)
* @return string crypted password - contains {xxx} prefix to identify mechanism.
*/
function _pacrypt_authlib($pw, $pw_db)
{
global $CONF;
$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 {