X2Go Bug report logs - #831
handle autologin failures via broker gracefully

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Package: x2goclient; Maintainer for x2goclient is X2Go Developers <x2go-dev@lists.x2go.org>; Source for x2goclient is src:x2goclient.

Reported by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

Date: Mon, 30 Mar 2015 04:25:02 UTC

Severity: minor

Found in version 4.0.4.0

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Subject: Bug#831: handle autologin failures via broker gracefully
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Date: Mon, 30 Mar 2015 04:24:48 +0000
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From: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
To: submit@bugs.x2go.org
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[Message part 1 (text/plain, inline)]
Package: x2goclient
Version: 4.0.4.0
Severity: minor

With brokerage enabled, the broker can mediate an autologin mechanism  
from X2Go Client to a given (brokeraged) server.

The mechanism is this:

  o broker deploys a public key in ~/.x2go/authorized_keys on
    X2Go Server
  o X2Go Client receives the corresponding private key
  o (the above is already flawed, no private keys should be sent
    over networks, I will file another bug for that)
  o in SSHd, the ~/.x2go/authorized_keys must be configured as
    potential place for authorized_keys file

If the last step is forgotten, SSH authentication with X2Go Client  
against the X2Go Server fails.

If that fails, my expectation would be a fall-back to username /  
password authentication.

But what happens, is: X2Go Client "gets stuck" in the session startup  
procedure (it's not a real freeze), it does not return to the login  
dialog widget anymore. Options remaining: closing X2Go Client and  
reopening.

I stumbled over this because of a configuration in SSH daemon on one  
of my test boxes.

Mike
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