X2Go Bug report logs - #1380
x2goclient shows wrong fingerprint

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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: Christian Krause <christian.krause@idiv.de>

Date: Mon, 1 Apr 2019 15:15:02 UTC

Severity: normal

Found in version 4.1.2.0

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Subject: Bug#1380: x2goclient shows wrong fingerprint
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From: Christian Krause <christian.krause@idiv.de>
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Package: x2goclient
Version: 4.1.2.0

The Windows version of x2goclient shows "a" wrong server key fingerprint. Both
the Linux client and PuTTY on Windows show the correct fingerprint.

x2goclient on Windows:

> The server is unknown. Do you trust the host key?
> Public key hash: SSH proxy connection error: (address omitted):22 -
> 57:a8:d5:ae:c6:9d:6a:a2:d1:4e:a4:c4:cd:51:7e:c8:72:75:51:5d

PuTTY on Windows:

> The server's host key is not cached in the registry. You have no guarantee
> that the server is the computer you think it is.
> The server's rsa2 key fingerprint is:
> ssh-rsa 2048 f3:27:28:1a:16:92:7e:a0:74:26:2f:ce:2e:54:f7:62
> If you trust this host, hit Yes to ...

On the host I'm trying to connect to:

```console
$ for i in /etc/ssh/*.pub ; do ssh-keygen -lf $i ; done
1024 27:6d:55:b1:f0:60:b6:06:ea:49:a1:c7:d5:4f:60:e9
/etc/ssh/ssh_host_dsa_key.pub (DSA)
2048 0e:68:68:d6:ed:be:d2:11:2f:11:60:41:97:b4:15:33 /etc/ssh/ssh_host_key.pub
(RSA1)
2048 f3:27:28:1a:16:92:7e:a0:74:26:2f:ce:2e:54:f7:62
/etc/ssh/ssh_host_rsa_key.pub (RSA)
```

Note: It's also really hard to figure out for which key x2go is trying to show
me the fingerprint. Both PuTTY and OpenSSH show the key type, so it's really
obvious. With x2go, I have to guess. (That's worth a different bug report, I know.)

-- 
Christian Krause

Scientific Computing Administration and Support

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Email: christian.krause@idiv.de

Office: BioCity Leipzig 5e, Room 3.201.3

Phone: +49 341 97 33144

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German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig

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Germany

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Beteiligte Kooperationspartner sind die folgenden außeruniversitären
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das Max-Planck-Institut fĂĽr Biogeochemie (MPI BGC), das Max-Planck-Institut fĂĽr
chemische Ökologie (MPI CE), das Max-Planck-Institut für evolutionäre
Anthropologie (MPI EVA), das Leibniz-Institut Deutsche Sammlung von
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Kulturpflanzenforschung (IPK) und das Leibniz-Institut Senckenberg Museum fĂĽr
Naturkunde Görlitz (SMNG). USt-IdNr. DE 141510383

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