[Twisted-Python] Twisted conch bad key signatures

Paul Swartz z3p at twistedmatrix.com
Wed Dec 21 04:07:56 EST 2005


Phil Mayers wrote:

> All,
>
> I've got an SSH server (Extremeware 7.3 router) which OpenSSH can SFTP
> into without problem but Twisted Conch reports:
>
> 2005/12/20 17:50 GMT [-] Log opened.
> 2005/12/20 17:50 GMT [-] Enabling Multithreading.
> 2005/12/20 17:50 GMT [Transport,client] kex alg, key alg:
> diffie-hellman-group1-sha1 ssh-dss
> 2005/12/20 17:50 GMT [Transport,client] client->server: 3des-cbc
> hmac-md5 none
> 2005/12/20 17:50 GMT [Transport,client] server->client: 3des-cbc
> hmac-md5 none
>
> 2005/12/20 17:50 GMT [Transport,client] host key fingerprint:
> 51:11:e1:76:89:f8:cd:af:8c:09:42:9e:37:a8:0a:36
> 2005/12/20 17:50 GMT [Transport,client] Disconnecting with error, code 3
>         reason: bad signature
> 2005/12/20 17:50 GMT [Transport,client] connection lost
> 2005/12/20 17:50 GMT [Transport,client] Stopping factory
> <twisted.internet.protocol._InstanceFactory instance at 0xb71b6b0c>
> 2005/12/20 17:50 GMT [-] Received SIGINT, shutting down.
> 2005/12/20 17:50 GMT [-] Main loop terminated.
>
> (cftp does the same). What debugging do I need to do to identify the
> cause?

Run OpenSSH with debugging on.  I'm guessing that they're enabling a workaround for a non-compliant server.

-p
-- 
       Paul Swartz
(o_    http://www.twistedmatrix.com/users/z3p.twistd/  _o)
//\    z3p at twistedmatrix.com                           /\\
V_/_   AIM: z3penguin                                 _\_V->





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