gssapi-keyex vs. gssapi-with-mic

Christoph Anton Mitterer
2014-11-07T23:16:46Z

Hey.

What are the differences (if any) between the authentication methods
gssapi-keyex and gssapi-with-mic, especially from a security point of
view.

I understand, that gssapi-keyex works of course only when the KEX was
made via GSS, while gssapi-with-mic works also with normal SSH KEX.
gssapi-with-mic in turn works also with GSS KEX.


RFC 4462 doesn't seem to tell much about the disadvantages / advantages
of the two over each other. And as far as I understand gssapi-keyex uses
a MIC as well?


Thanks,
Chris.
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