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-rw-r--r--sleekxmpp/util/sasl/mechanisms.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/sleekxmpp/util/sasl/mechanisms.py b/sleekxmpp/util/sasl/mechanisms.py
index 6c2aeb04..d341ed3e 100644
--- a/sleekxmpp/util/sasl/mechanisms.py
+++ b/sleekxmpp/util/sasl/mechanisms.py
@@ -532,6 +532,9 @@ else:
result = kerberos.authGSSClientStep(self.gss, b64_challenge)
if result != kerberos.AUTH_GSS_CONTINUE:
self.step = 1
+ elif not challenge:
+ kerberos.authGSSClientClean(self.gss)
+ return b''
elif self.step == 1:
username = self.credentials['username']