-}
-else {
- unset($_SESSION['authenticated']);
- unset($_SESSION['uid']);
- unset($_SESSION['visitor_id']);
- unset($_SESSION['is_visitor']);
- unset($_SESSION['administrator']);
- unset($_SESSION['cid']);
- $encrypted = hash('whirlpool',trim($_POST['password']));
-
- if((x($_POST,'auth-params')) && $_POST['auth-params'] == 'login') {
- $r = q("SELECT * FROM `user`
- WHERE `email` = '%s' AND `password` = '%s' LIMIT 1",
- dbesc(trim($_POST['login-name'])),
- dbesc($encrypted));
- if(($r === false) || (! count($r))) {
- $_SESSION['sysmsg'] = 'Login failed.' . EOL ;
- goaway($a->get_baseurl());
+
+ if((x($_POST,'auth-params')) && $_POST['auth-params'] === 'login') {
+
+ $record = null;
+
+ $addon_auth = array(
+ 'username' => trim($_POST['username']),
+ 'password' => trim($_POST['password']),
+ 'authenticated' => 0,
+ 'user_record' => null
+ );
+
+ /**
+ *
+ * A plugin indicates successful login by setting 'authenticated' to non-zero value and returning a user record
+ * Plugins should never set 'authenticated' except to indicate success - as hooks may be chained
+ * and later plugins should not interfere with an earlier one that succeeded.
+ *
+ */
+
+ call_hooks('authenticate', $addon_auth);
+
+ if(($addon_auth['authenticated']) && (count($addon_auth['user_record']))) {
+ $record = $addon_auth['user_record'];
+ }
+ else {
+
+ // process normal login request
+
+ $r = q("SELECT `user`.*, `user`.`pubkey` as `upubkey`, `user`.`prvkey` as `uprvkey`
+ FROM `user` WHERE ( `email` = '%s' OR `nickname` = '%s' )
+ AND `password` = '%s' AND `blocked` = 0 AND `account_expired` = 0 AND `account_removed` = 0 AND `verified` = 1 LIMIT 1",
+ dbesc(trim($_POST['username'])),
+ dbesc(trim($_POST['username'])),
+ dbesc($encrypted)
+ );
+ if(count($r))
+ $record = $r[0];
+ }
+
+ if((! $record) || (! count($record))) {
+ logger('authenticate: failed login attempt: ' . notags(trim($_POST['username'])) . ' from IP ' . $_SERVER['REMOTE_ADDR']);
+ notice( t('Login failed.') . EOL );
+ goaway(z_root());