From e463b6e644318c5da502f9328abf8069173ee4bc Mon Sep 17 00:00:00 2001
From: Allen Winter <winter@kde.org>
Date: Sun, 6 Sep 2015 11:28:23 -0400
Subject: [PATCH 21/47] kimap/loginjob.cpp - support for GSSAPI authentication
 patch by eifert almost 3 years ago. ok'd by Christian

BUG: 267884
MERGE: looks safe for merging to modern versions
---
 kimap/loginjob.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/kimap/loginjob.cpp b/kimap/loginjob.cpp
index d3473d414..b7d2cd8a8 100644
--- a/kimap/loginjob.cpp
+++ b/kimap/loginjob.cpp
@@ -372,8 +372,14 @@ void LoginJob::handleResponse( const Message &response )
         if ( !d->answerChallenge( QByteArray::fromBase64( response.content[1].toString() ) ) ) {
           emitResult(); //error, we're done
         }
+      } else if ( d->authMode == QLatin1String( "GSSAPI" ) && response.content.size() == 1 ) {
+          // fix for bug 267884
+          // Empty continuation for GSSAPI, accept as challenge nevertheless
+          if ( !d->answerChallenge( "" ) ) {
+              emitResult(); //error, we're done
+          }
       } else {
-        // Received empty continuation for authMode other than PLAIN
+        // Received empty continuation for authMode other than PLAIN or GSSAPI
         code = MALFORMED;
       }
       break;
-- 
2.14.1