Wireshark-users: Re: [Wireshark-users] Trouble with SSL dissector - got it half working!
From: "Sake Blok" <sake@xxxxxxxxxx>
Date: Tue, 29 Sep 2009 16:31:01 +0200
Hi Dominic,
 
The fact that you got it working for one of the two flows means that the key is ok, you are not using a DH cipher and that all packets of the SSL handshake are present in the trace (those are the 3 common problems with decrypting traffic). However, if the other flow does not decrypt, that could be caused by:
 
- a missing packet in that flow (unable to fix)
- the first tcp segment of the first SSL record received out-of-order (could be fixed with editcap and mergecap, but is not so trivial)
- duplicate packets in that flow (could be fixed by using 'editcap -d <infile> <outfile>')
 
If those are not the case, are you able to provide the capture file and the key? Or is this a production environment?
 
Cheers,
 
 
Sake
 
 
----- Original Message -----
Sent: Tuesday, September 29, 2009 11:26 AM
Subject: [Wireshark-users] Trouble with SSL dissector - got it half working!


After much trawling and experimentation I've almost managed to get the SSL dissector working but strangely I can only decode my incoming http requests (all the responses are still encrypted).  I've tried using the "decode as" option to make it decode for the client port as well as the server port (although I didn't expect that to be necessary) and I've tried added the client ip address and socket as a second "private key" in the configuration.  Neither helped.

I'd appreciate any suggestions - I'm happy to provide additional details if that would help.

Thanks,

-Dominic





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