openssh bugs - Oct 2015 - [Bug 1777] KnownHostsCommand

https://bugzilla.mindrot.org/show_bug.cgi?id=1777

Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
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                 CC|                            |djm at mindrot.org

--- Comment #3 from Damien Miller <djm at mindrot.org> ---
This is possible to do, but without some significant changes is likely
to be fairly inefficient. 

ssh reads known_hosts a couple of times during connection. At least
once to figure out what host key algorithms are in use, then again to
verify the hostkey sent and (optionally) a couple of times to deal with
UpdateHostkeys messages from the server.

This could result in the KnownHostsCommand being run a bunch of times
and, unless it was very efficient, could make ssh pretty slow.

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