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<?php

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class wfCredentialsController {

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const UNCACHED = 'uncached';

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const NOT_LEAKED = 'not-leaked';

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const LEAKED = 'leaked';

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const ALLOW_LEGACY_2FA_OPTION = 'allowLegacy2FA';

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const DISABLE_LEGACY_2FA_OPTION = 'disableLegacy2FA';

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public static function allowLegacy2FA() {

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return wfConfig::get(self::ALLOW_LEGACY_2FA_OPTION, false);

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}

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public static function useLegacy2FA() {

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if (!self::allowLegacy2FA()) {

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return false;

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}

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return !wfConfig::get(self::DISABLE_LEGACY_2FA_OPTION, false);

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}

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public static function hasOld2FARecords() {

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$twoFactorUsers = wfConfig::get_ser('twoFactorUsers', array());

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if (is_array($twoFactorUsers) && !empty($twoFactorUsers)) {

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foreach ($twoFactorUsers as &$t) {

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if ($t[3] == 'activated') {

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$user = new WP_User($t[0]);

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if ($user instanceof WP_User && $user->exists()) {

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return true;

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}

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}

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}

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}

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return false;

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}

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public static function hasNew2FARecords() {

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if (version_compare(phpversion(), '5.3', '>=') && class_exists('\WordfenceLS\Controller_DB')) {

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global $wpdb;

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$table = WFLSPHP52Compatability::secrets_table();

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return !!intval($wpdb->get_var("SELECT COUNT(*) FROM `{$table}`"));

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}

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return false;

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}

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/**

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* Queries the API and returns whether or not the password exists in the breach database.

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* @param string $login

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* @param string $password

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* @return bool

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public static function isLeakedPassword($login, $password) {

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$sha1 = strtoupper(hash('sha1', $password));

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$prefix = substr($sha1, 0, 5);

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$ssl_verify = (bool) wfConfig::get('ssl_verify');

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$args = array(

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'timeout' => 5,

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'user-agent' => "Wordfence.com UA " . (defined('WORDFENCE_VERSION') ? WORDFENCE_VERSION : '[Unknown version]'),

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'sslverify' => $ssl_verify,

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'headers' => array('Referer' => false),

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);

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if (!$ssl_verify) { // Some versions of cURL will complain that SSL verification is disabled but the CA bundle was supplied.

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$args['sslcertificates'] = false;

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}

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$response = wp_remote_get(sprintf(WORDFENCE_BREACH_URL_BASE_SEC . "%s.txt", $prefix), $args);

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if (!is_wp_error($response)) {

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$data = wp_remote_retrieve_body($response);

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$lines = explode("\n", $data);

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foreach ($lines as $l) {

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$components = explode(":", $l);

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$teshSHA1 = $prefix . strtoupper($components[0]);

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if (hash_equals($sha1, $teshSHA1)) {

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return true;

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}

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}

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}

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return false;

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}

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/**

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* Returns the transient key for the given user.

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* @param WP_User $user

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* @return string

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protected static function _cachedCredentialStatusKey($user) {

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$key = 'wfcredentialstatus_' . $user->ID;

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return $key;

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}

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/**

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* Returns the cached credential status for the given user: self::UNCACHED, self::NOT_LEAKED, or self::LEAKED.

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* @param WP_User $user

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* @return string

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public static function cachedCredentialStatus($user) {

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$key = self::_cachedCredentialStatusKey($user);

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$value = get_transient($key);

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if ($value === false) {

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return self::UNCACHED;

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}

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$status = substr($value, 0, 1);

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if (strlen($value) > 1) {

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if (!hash_equals(substr($value, 1), hash('sha256', $user->user_pass))) { //Different hash but our clear function wasn't called so treat it as uncached

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return self::UNCACHED;

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}

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}

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if ($status) {

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return self::LEAKED;

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}

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return self::NOT_LEAKED;

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}

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/**

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* Stores a cached leak value for the given user.

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* @param WP_User $user

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* @param bool $isLeaked

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public static function setCachedCredentialStatus($user, $isLeaked) {

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$key = self::_cachedCredentialStatusKey($user);

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set_transient($key, ($isLeaked ? '1' : '0') . hash('sha256', $user->user_pass), 3600);

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}

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/**

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* Clears the cache for the given user.

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* @param WP_User $user

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public static function clearCachedCredentialStatus($user) {

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$key = self::_cachedCredentialStatusKey($user);

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delete_transient($key);

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}

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/**

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* Returns whether or not we've seen a successful login from $ip for the given user.

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* @param WP_User $user

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* @param string $ip

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* @return bool

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public static function hasPreviousLoginFromIP($user, $ip) {

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global $wpdb;

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$table_wfLogins = wfDB::networkTable('wfLogins');

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$id = property_exists($user, 'ID') ? $user->ID : 0;

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if ($id == 0) {

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return false;

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}

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$ipHex = wfDB::binaryValueToSQLHex(wfUtils::inet_pton($ip));

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$result = $wpdb->get_row($wpdb->prepare("SELECT id FROM {$table_wfLogins} WHERE action = 'loginOK' AND userID = %d AND IP = {$ipHex} LIMIT 0,1", $id), ARRAY_A);

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if (is_array($result)) {

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return true;

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}

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$lastAdminLogin = wfConfig::get_ser('lastAdminLogin');

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if (is_array($lastAdminLogin) && isset($lastAdminLogin['userID']) && isset($lastAdminLogin['IP'])) {

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if ($lastAdminLogin['userID'] == $id && wfUtils::inet_pton($lastAdminLogin['IP']) == wfUtils::inet_pton($ip)) {

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return true;

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}

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return false;

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}

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//Final check -- if the IP recorded at plugin activation matches, let it through. This is __only__ checked when we don't have any other record of an admin login.

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$activatingIP = wfConfig::get('activatingIP');

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if (wfUtils::isValidIP($activatingIP)) {

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if (wfUtils::inet_pton($activatingIP) == wfUtils::inet_pton($ip)) {

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return true;

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}

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}

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return false;

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}

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}

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