Hi Henning, Thank you for the reply. An ngrep shows the full SIP packet, and there is an empty "qop" value in the Authorization header:
Authorization: Digest realm="sip.example.com", nonce="aR0SEGkdEOQ2eLjMXqc05nC5+GDLOKUy", algorithm=MD5, username="123456789", uri="sip:sip.example.com:5060", response="21c1d546986a43c871486fcf2ef3ff83", cnonce="IWbhxqr9ut1LqMwj", nc=00000001, qop=. So I'm not sure why Wireshark says the packet is truncated. Would you have any ideas on where to look for the reason? On Wed, 19 Nov 2025 at 06:02, Henning Westerholt <[email protected]> wrote: > Hello David, > > > > the cnonce is not so common but usually supported from kamailio. If you > are having a trace, have a look to the raw SIP packet to see if it was > maybe really truncated on the wire. The QOP seems to be missing/truncated > from the dump below. > > > > Cheers, > > > > Henning > > > > *From:* David Cunningham via sr-users <[email protected]> > *Sent:* Dienstag, 18. November 2025 03:34 > *To:* Kamailio (SER) - Users Mailing List <[email protected]> > *Cc:* David Cunningham <[email protected]> > *Subject:* [SR-Users] error while parsing credentials > > > > Hello, > > > > We have one particular device which won't authenticate with Kamailio, and > are looking for any insight into why. When Kamailio receives the REGISTER > it logs: > > > > Nov 17 17:50:37 sip /sbin/kamailio[2293367]: ERROR: {1 2 REGISTER > mrXSmu5Gh} <core> [core/parser/digest/digest.c:323]: find_credentials(): > error while parsing credentials > Nov 17 17:50:37 sip /sbin/kamailio[2293367]: ERROR: {1 2 REGISTER > mrXSmu5Gh} auth [api.c:73]: pre_auth(): Error while looking for credentials > > > > A redacted copy of the REGISTER is below. I note two unusual things: > > - On the Authorization header it says "[truncated]Authorization". > > - It includes a "cnonce" (client nonce) in the Authorization data, which > is unusual compared to our other SIP devices. > > Thanks in advance! > > > > Session Initiation Protocol (REGISTER) > Request-Line: REGISTER sip:sip.example.com:5060 SIP/2.0 > Message Header > To: "C25" <sip:[email protected]> > SIP to display info: "C25" > SIP to address: sip:[email protected] > SIP to address User Part: 123456789 > SIP to address Host Part: sip.example.com > From: "C25" <sip:[email protected]>;tag=mmVG392Qv > SIP from display info: "C25" > SIP from address: sip:[email protected] > SIP from tag: mmVG392Qv > Contact: <sip:[email protected]:65477;transport=udp> > Contact URI: sip:[email protected]:65477;transport=udp > Via: SIP/2.0/UDP 11.22.221.114:65477;branch=z9hG4bK.X0v8d63yc > CSeq: 2 REGISTER > Call-ID: iYC5fcJqy > [Generated Call-ID: iYC5fcJqy] > Max-Forwards: 70 > Allow: INVITE, ACK, CANCEL, BYE, OPTIONS, NOTIFY > User-Agent: Rogue sip 7.1.11 (stm32mp15-ya157c-v2) linux > Expires: 3600 > [truncated]Authorization: Digest realm="sip.example.com", > nonce="aRvGYGkbxTQrS5pTzBoahdefo1xCqskN", algorithm=MD5, > username="123456789", uri="sip:sip.example.com:5060", > response="ab717ce439c666e9b5651d0dc74dff9a", cnonce="MzrTCxYCoCPxZ > Authentication Scheme: Digest > Realm: "sip.example.com" > Nonce Value: "aRvGYGkbxTQrS5pTzBoahdefo1xCqskN" > Algorithm: MD5 > Username: "123456789" > Authentication URI: "sip:sip.example.com:5060" > Digest Authentication Response: > "ab717ce439c666e9b5651d0dc74dff9a" > CNonce Value: "MzrTCxYCoCPxZ91a" > Nonce Count: 00000001 > QOP: > Content-Length: 0 > > > > -- > > David Cunningham, Voisonics Limited > http://voisonics.com/ > USA: +1 213 221 1092 > New Zealand: +64 (0)28 2558 3782 > -- David Cunningham, Voisonics Limited http://voisonics.com/ USA: +1 213 221 1092 New Zealand: +64 (0)28 2558 3782
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