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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Various validation functions
*
* Validation function takes two argument: id for which it is called
* and array of fields' values (usually values for entire formset, as defined
* in forms.inc.php).
* The function must always return an array with an error (or error array)
* assigned to a form element (formset name or field path). Even if there are
* no errors, key must be set with an empty value.
*
* Valdiation functions are assigned in $cfg_db['_validators'] (config.values.php).
*
* @package phpMyAdmin
*/
/**
* Returns validator list
*
* @uses ConfigFile::getDbEntry()
* @uses ConfigFile::getInstance()
* @return array
*/
function PMA_config_get_validators()
{
static $validators = null;
if ($validators === null) {
$cf = ConfigFile::getInstance();
$validators = $cf->getDbEntry('_validators', array());
if (!defined('PMA_SETUP')) {
// not in setup script: load additional validators for user preferences
// we need oryginal config values not overwritten by user preferences, creating a new PMA_Config
// instance is a better idea than hacking into its code
$org_cfg = $cf->getOrgConfigObj();
$uvs = $cf->getDbEntry('_userValidators', array());
foreach ($uvs as $field => $uv_list) {
$uv_list = (array)$uv_list;
foreach ($uv_list as &$uv) {
if (!is_array($uv)) {
continue;
}
for ($i = 1; $i < count($uv); $i++) {
if (substr($uv[$i], 0, 6) == 'value:') {
$uv[$i] = PMA_array_read(substr($uv[$i], 6), $org_cfg->settings);
}
}
}
$validators[$field] = isset($validators[$field])
? array_merge((array)$validators[$field], $uv_list)
: $uv_list;
}
}
}
return $validators;
}
/**
* Runs validation $validator_id on values $values and returns error list.
*
* Return values:
* o array, keys - field path or formset id, values - array of errors
* when $isPostSource is true values is an empty array to allow for error list
* cleanup in HTML documen
* o false - when no validators match name(s) given by $validator_id
*
* @uses ConfigFile::getCanonicalPath()
* @uses ConfigFile::getInstance()
* @uses PMA_config_get_validators()
* @param string|array $validator_id
* @param array $values
* @param bool $isPostSource tells whether $values are directly from POST request
* @return bool|array
*/
function PMA_config_validate($validator_id, &$values, $isPostSource)
{
// find validators
$validator_id = (array) $validator_id;
$validators = PMA_config_get_validators();
$vids = array();
$cf = ConfigFile::getInstance();
foreach ($validator_id as &$vid) {
$vid = $cf->getCanonicalPath($vid);
if (isset($validators[$vid])) {
$vids[] = $vid;
}
}
if (empty($vids)) {
return false;
}
// create argument list with canonical paths and remember path mapping
$arguments = array();
$key_map = array();
foreach ($values as $k => $v) {
$k2 = $isPostSource ? str_replace('-', '/', $k) : $k;
$k2 = strpos($k2, '/') ? $cf->getCanonicalPath($k2) : $k2;
$key_map[$k2] = $k;
$arguments[$k2] = $v;
}
// validate
$result = array();
foreach ($vids as $vid) {
// call appropriate validation functions
foreach ((array)$validators[$vid] as $validator) {
$vdef = (array) $validator;
$vname = array_shift($vdef);
$args = array_merge(array($vid, &$arguments), $vdef);
$r = call_user_func_array($vname, $args);
// merge results
if (is_array($r)) {
foreach ($r as $key => $error_list) {
// skip empty values if $isPostSource is false
if (!$isPostSource && empty($error_list)) {
continue;
}
if (!isset($result[$key])) {
$result[$key] = array();
}
$result[$key] = array_merge($result[$key], (array)$error_list);
}
}
}
}
// restore original paths
$new_result = array();
foreach ($result as $k => $v) {
$k2 = isset($key_map[$k]) ? $key_map[$k] : $k;
$new_result[$k2] = $v;
}
return empty($new_result) ? true : $new_result;
}
/**
* Empty error handler, used to temporarily restore PHP internal error handler
*
* @return bool
*/
function PMA_null_error_handler()
{
return false;
}
/**
* Ensures that $php_errormsg variable will be registered in case of an error
* and enables output buffering (when $start = true).
* Called with $start = false disables output buffering end restores
* html_errors and track_errors.
*
* @param boolean $start
*/
function test_php_errormsg($start = true)
{
static $old_html_errors, $old_track_errors, $old_error_reporting;
static $old_display_errors;
if ($start) {
$old_html_errors = ini_get('html_errors');
$old_track_errors = ini_get('track_errors');
$old_display_errors = ini_get('display_errors');
$old_error_reporting = error_reporting(E_ALL);
ini_set('html_errors', false);
ini_set('track_errors', true);
ini_set('display_errors', true);
set_error_handler("PMA_null_error_handler");
ob_start();
} else {
ob_end_clean();
restore_error_handler();
error_reporting($old_error_reporting);
ini_set('html_errors', $old_html_errors);
ini_set('track_errors', $old_track_errors);
ini_set('display_errors', $old_display_errors);
}
}
/**
* Test database connection
*
* @param string $extension 'mysql' or 'mysqli'
* @param string $connect_type 'tcp' or 'socket'
* @param string $host
* @param string $port
* @param string $socket
* @param string $user
* @param string $pass
* @param string $error_key
* @return bool|array
*/
function test_db_connection($extension, $connect_type, $host, $port, $socket, $user, $pass = null, $error_key = 'Server')
{
// test_php_errormsg();
$socket = empty($socket) || $connect_type == 'tcp' ? null : ':' . $socket;
$port = empty($port) || $connect_type == 'socket' ? null : ':' . $port;
$error = null;
if ($extension == 'mysql') {
$conn = @mysql_connect($host . $socket . $port, $user, $pass);
if (!$conn) {
$error = __('Could not connect to MySQL server');
} else {
mysql_close($conn);
}
} else {
$conn = @mysqli_connect($host, $user, $pass, null, $port, $socket);
if (!$conn) {
$error = __('Could not connect to MySQL server');
} else {
mysqli_close($conn);
}
}
// test_php_errormsg(false);
if (isset($php_errormsg)) {
$error .= " - $php_errormsg";
}
return is_null($error) ? true : array($error_key => $error);
}
/**
* Validate server config
*
* @uses test_db_connection()
* @param string $path
* @param array $values
* @return array
*/
function validate_server($path, $values)
{
$result = array('Server' => '', 'Servers/1/user' => '', 'Servers/1/SignonSession' => '', 'Servers/1/SignonURL' => '');
$error = false;
if ($values['Servers/1/auth_type'] == 'config' && empty($values['Servers/1/user'])) {
$result['Servers/1/user'] = __('Empty username while using config authentication method');
$error = true;
}
if ($values['Servers/1/auth_type'] == 'signon' && empty($values['Servers/1/SignonSession'])) {
$result['Servers/1/SignonSession'] = __('Empty signon session name while using signon authentication method');
$error = true;
}
if ($values['Servers/1/auth_type'] == 'signon' && empty($values['Servers/1/SignonURL'])) {
$result['Servers/1/SignonURL'] = __('Empty signon URL while using signon authentication method');
$error = true;
}
if (!$error && $values['Servers/1/auth_type'] == 'config') {
$password = $values['Servers/1/nopassword'] ? null : $values['Servers/1/password'];
$test = test_db_connection($values['Servers/1/extension'], $values['Servers/1/connect_type'], $values['Servers/1/host'], $values['Servers/1/port'], $values['Servers/1/socket'], $values['Servers/1/user'], $password, 'Server');
if ($test !== true) {
$result = array_merge($result, $test);
}
}
return $result;
}
/**
* Validate pmadb config
*
* @uses test_db_connection()
* @param string $path
* @param array $values
* @return array
*/
function validate_pmadb($path, $values)
{
//$tables = array('Servers/1/bookmarktable', 'Servers/1/relation', 'Servers/1/table_info', 'Servers/1/table_coords', 'Servers/1/pdf_pages', 'Servers/1/column_info', 'Servers/1/history', 'Servers/1/designer_coords');
$result = array('Server_pmadb' => '', 'Servers/1/controluser' => '', 'Servers/1/controlpass' => '');
$error = false;
if ($values['Servers/1/pmadb'] == '') {
return $result;
}
$result = array();
if ($values['Servers/1/controluser'] == '') {
$result['Servers/1/controluser'] = __('Empty phpMyAdmin control user while using pmadb');
$error = true;
}
if ($values['Servers/1/controlpass'] == '') {
$result['Servers/1/controlpass'] = __('Empty phpMyAdmin control user password while using pmadb');
$error = true;
}
if (!$error) {
$test = test_db_connection($values['Servers/1/extension'], $values['Servers/1/connect_type'],
$values['Servers/1/host'], $values['Servers/1/port'], $values['Servers/1/socket'],
$values['Servers/1/controluser'], $values['Servers/1/controlpass'], 'Server_pmadb');
if ($test !== true) {
$result = array_merge($result, $test);
}
}
return $result;
}
/**
* Validates regular expression
*
* @uses test_php_errormsg()
* @param string $path
* @param array $values
* @return array
*/
function validate_regex($path, $values)
{
$result = array($path => '');
if ($values[$path] == '') {
return $result;
}
test_php_errormsg();
$matches = array();
// in libraries/List_Database.class.php _checkHideDatabase(),
// a '/' is used as the delimiter for hide_db
preg_match('/' . $values[$path] . '/', '', $matches);
test_php_errormsg(false);
if (isset($php_errormsg)) {
$error = preg_replace('/^preg_match\(\): /', '', $php_errormsg);
return array($path => $error);
}
return $result;
}
/**
* Validates TrustedProxies field
*
* @param string $path
* @param array $values
* @return array
*/
function validate_trusted_proxies($path, $values)
{
$result = array($path => array());
if (empty($values[$path])) {
return $result;
}
if (is_array($values[$path])) {
// value already processed by FormDisplay::save
$lines = array();
foreach ($values[$path] as $ip => $v) {
$lines[] = preg_match('/^-\d+$/', $ip)
? $v
: $ip . ': ' . $v;
}
} else {
// AJAX validation
$lines = explode("\n", $values[$path]);
}
foreach ($lines as $line) {
$line = trim($line);
$matches = array();
// we catch anything that may (or may not) be an IP
if (!preg_match("/^(.+):(?:[ ]?)\\w+$/", $line, $matches)) {
$result[$path][] = __('Incorrect value') . ': ' . $line;
continue;
}
// now let's check whether we really have an IP address
if (filter_var($matches[1], FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) === false
&& filter_var($matches[1], FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) === false) {
$ip = htmlspecialchars(trim($matches[1]));
$result[$path][] = sprintf(__('Incorrect IP address: %s'), $ip);
continue;
}
}
return $result;
}
/**
* Tests integer value
*
* @param string $path
* @param array $values
* @param bool $allow_neg allow negative values
* @param bool $allow_zero allow zero
* @param int $max_value max allowed value
* @param string $error_string error message key: $GLOBALS["strConfig$error_lang_key"]
* @return string empty string if test is successful
*/
function test_number($path, $values, $allow_neg, $allow_zero, $max_value, $error_string)
{
if ($values[$path] === '') {
return '';
}
if (intval($values[$path]) != $values[$path] || (!$allow_neg && $values[$path] < 0) || (!$allow_zero && $values[$path] == 0) || $values[$path] > $max_value) {
return $error_string;
}
return '';
}
/**
* Validates port number
*
* @uses test_number()
* @param string $path
* @param array $values
* @return array
*/
function validate_port_number($path, $values)
{
return array($path => test_number($path, $values, false, false, 65535, __('Not a valid port number')));
}
/**
* Validates positive number
*
* @uses test_number()
* @param string $path
* @param array $values
* @return array
*/
function validate_positive_number($path, $values)
{
return array($path => test_number($path, $values, false, false, PHP_INT_MAX, __('Not a positive number')));
}
/**
* Validates non-negative number
*
* @uses test_number()
* @param string $path
* @param array $values
* @return array
*/
function validate_non_negative_number($path, $values)
{
return array($path => test_number($path, $values, false, true, PHP_INT_MAX, __('Not a non-negative number')));
}
/**
* Validates value according to given regular expression
* Pattern and modifiers must be a valid for PCRE <b>and</b> JavaScript RegExp
*
* @param string $path
* @param array $values
* @param string $regex
* @return void
*/
function validate_by_regex($path, $values, $regex)
{
$result = preg_match($regex, $values[$path]);
return array($path => ($result ? '' : __('Incorrect value')));
}
/**
* Validates upper bound for numeric inputs
*
* @param string $path
* @param array $values
* @param int $max_value
* @return array
*/
function validate_upper_bound($path, $values, $max_value)
{
$result = $values[$path] <= $max_value;
return array($path => ($result ? '' : sprintf(__('Value must be equal or lower than %s'), $max_value)));
}
?>
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