Re: error while parsing credentials

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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