token counter fix

diff --git a/lib/ga4php.php b/lib/ga4php.php
index 6c4e156..784a918 100644 (file)
--- a/lib/ga4php.php
+++ b/lib/ga4php.php
@@ -250,7 +250,10 @@ abstract class GoogleAuthenticator {
                $data = $this->internalGetData($user);
                $toktype = $data["tokentype"];
                $key = $this->helperhex2b32($data["tokenkey"]);
-               $counter = $data["tokencounter"];
+
+               // token counter should be one more then current token value, otherwise
+               // it gets confused
+               $counter = $data["tokencounter"]+1;
                $toktype = strtolower($toktype);
                if($toktype == "hotp") {
                        $url = "otpauth://$toktype/$user?secret=$key&counter=$counter";