[SR-Users] Kamailio - Nonce validity between Register and Invite

[Klaus Darilion]

The nonce is globally valid until it expires (for all kind of requests, 
IIRC you could also change the user).

Maybe your "internal" SIP clients calculates the response wrong. You 
could test the response calculation with this website (do not use 'real' 
passwords):
http://pernau.at/kd/sipdigest.php

klaus

On 22.08.2012 10:51, patrice.bodeven at orange.com wrote:
> Hello,
>
> I am working on Kamailio 3.2.2. There is no traffic, only functional
> test done.
>
> Based on the SIP Client used until now (Xlite), the INVITE is
> systematically authenticated by 407 as there is no Proxy-Authorization
> in the initial INVITE. Expected/normal behavior.
>
> But when using an internal SIP client, the initial INVITE is generated
> with a Proxy-Authorization containing the nonce value used by the
> successful registration.
>
> _In Authorization of Register (the answer is 200OK)_
>
> Digest username="+33296488922 at ims.v0.pftest.net",
> realm="sip:ims.v0.pftest.net",
> nonce="UDP43lAzpH7SjicT6+9/KDDloW4OTfTXoGWlZurBVut0JV604jox/QY+tVeA",
> uri="sip:ims.v0.pftest.net",
> response="4ed51b8e62cf769b19f8c4771e068ad3",
> cnonce="06440000000529330fe1", qop=auth, nc=00000011
>
> _In Proxy-Authorization of Invite _
>
> Digest username="+33296488922 at ims.v0.pftest.net",
> realm="sip:ims.v0.pftest.net",
> nonce="UDP43lAzpH7SjicT6+9/KDDloW4OTfTXoGWlZurBVut0JV604jox/QY+tVeA",
> uri="sip:0157361149 at ims.v0.pftest.net",
> response="b247052d6d5b37e0b6677c816390cb77",
> cnonce="06440000000529330fe1", qop=auth, nc=00000012
>
> As the nonce expire is high (see nonce_expire), I don't understand why
> Kamailio requests the Authentication of the INVITE by 407.
>
> _407 with Proxy-Authenticate_: Digest realm="ims.v0.pftest.net",
> nonce="UDP6pVAzpkWDF+jSlP3zzVYcuNPhY8NQBj62WIA=", qop="auth", stale=true
>
> *Does it mean that the REGISTER and INVITE are using different Nonce
> value ? *
>
> èInformation on my configuration file.
>
> modparam("auth_db", "db_url", DBURLAUTH)
>
> modparam("auth", "auth_checks_register", 6) # callid and From TAG
>
> modparam("auth", "qop", "auth")    # enable qop=auth
>
> modparam("auth", "nonce_count", 1) # enable nonce_count support
>
> modparam("auth", "nonce_expire", 21600)   # Set nonce_expire to 6 hours
>
> For register, I do
>
>                   if (!www_authorize("$ru", "subscriber"))
>
>                  {
>
>                     if($? == -2 || $? == -3) {
>
>                        sl_send_reply("403","Forbidden auth ID");
>
>                       exit;
>
>                     }
>
>                     else {
>
>                          www_challenge("$ru", "17");
>
>                          exit;
>
>                     }
>
>                  }
>
> For invite, I do
>
>             if (!proxy_authorize("$fd", "subscriber"))
>
>             {
>
>                 if($? == -2 || $? == -3) {
>
>                    sl_send_reply("403","Forbidden auth ID");
>
>                    exit;
>
>                 }
>
>                else {
>
>                     proxy_challenge("$fd", "17");
>
>                     xlog("L_INFO","INVITE challenged by 407 to :$di:$dp
> \n");
>
>                     exit;
>
>                  }
>
>             }
>
> Followed by consume_credentials();
>
> Thanks in advance for your support.
>
> *Patrice B*
>
> _________________________________________________________________________________________________________________________
>
> Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc
> pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler
> a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration,
> France Telecom - Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci.
>
> This message and its attachments may contain confidential or privileged information that may be protected by law;
> they should not be distributed, used or copied without authorisation.
> If you have received this email in error, please notify the sender and delete this message and its attachments.
> As emails may be altered, France Telecom - Orange is not liable for messages that have been modified, changed or falsified.
> Thank you.
>
>
>
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> sr-users at lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>