Bug 3480 - gssapi (cvs) breaks when external_ssf >= max_ssf

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Hello everybody,

We were dealing recently with this bug in our environment and since there is no official statement from authors, I'm CC'ing also author of this commit [1], who is also author of RFC [2], if I got this right. I was reading through the RFC and this commit does it exactly according to specification, but it looks like it is not backward compatible with some other implementations, namely M$ ActiveDirectory or even cyrus-sasl-2.1.23. Interoperability is important for us and we can't leave this change here only because of "it's in RFC". If I see correctly, most of distributions reverted this commit in their releases and they are still doing fine. We will probably join them, if there will not be any other solution to maintain backward compatibility.

I didn't find any official statement about this bugzilla [3], nor about backward compatibility so I would like to ask for some, if you would be so kind. Here or better to bugzilla. It is not good presentation, having bugzilla with such wide impact without any official statement.

[1] https://cgit.cyrus.foundation/cyrus-sasl/commit/?id=080e51c7fa0421eb2f0210d34cf0ac48a228b1e9
[2] https://www.ietf.org/rfc/rfc4752.txt
[3] https://bugzilla.cyrusimap.org/show_bug.cgi?id=3480

Jakub Jelen
Associate Software Engineer
Security Technologies
Red Hat

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