Hi, I don't understand very well what you mean.
The nonce used when you deRegister is not supposed to be the same the one used 
in Register. I don't understand how you manage to do that... When you 
deregister, your OpenIMS core should send you a new 401 containing a new nonce 
(to avoid replay attack).

The scenario here 
http://sipp.sourceforge.net/wiki/index.php/Howto_test_on_Open_Source_IMS_platform_using_SIPp
 works with OpenIMS very well.

I've checked you file and I've seen that the first deregister message contain 
[authentication] field. To build the first deregister message, just copy-past 
the first register message and set expires to 0.

Regards

Clément JEANNE.

Stagiaire R&D.



Astellia

Tel.: +33 (0)2 99 04 80 60

Visit our web site: www.astellia.com


-----Message d'origine-----
De : Oliva Lukáš [mailto:p...@seznam.cz]
Envoyé : mercredi 21 juillet 2010 13:18
À : sipp-users@lists.sourceforge.net
Objet : [Sipp-users] Authentication mechanism in sipp

  Hello,
I try to build basic scenarios with the sipp tool to verify some basic 
functionality of OpenIMSCore (previously SIP Express Router), so I started with 
Register - DeRegister. While I was able to REGISTER successfully (as for the 
callflow and what FHoSS reported), I am unable to use results of previous 
authentication (from 2 REGISTER). I tried to use [authenticate user= ... 
password= ...] once more, but the nonce count is then again 0000001 which seems 
to result in 471 Unauthorized.
  My question therefore is, is there a mechanism how to include correct 
authorization header with right (increased) value of Nonce Count (nc)?

  For reference, please see my scenario:

UE -> PCSCF

REGISTER ->
<- 471
REGISTER ->
<- 200 OK

<pause 5000 ms>

REGISTER (Expires = 0) ->
<- 200 OK

The attached source files are based on example source files from openimscore 
site.

  Best regards

  Lukas


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