Re: [Linphone-users] Some info about Digest Auth

[Simon Morlat]

Hi,

Thanks for this additional information.
I've asked Aymeric Moizard, author of libosip and exosip his point of view 
about this problem.

Simon

Le Vendredi 21 Avril 2006 17:06, Dermot McGahon a écrit :
> Hi Simon,
>
> I've been looking into why Digest Auth isn't working when registering
> to a Tadiran PABX, here's what I've found out so far.
>
> RFC 2617 says that qop "SHOULD be used if the server indicated that qop
> is supported by providing a qop directive in the WWW-Authenticate header
> field". And that if qop is sent, cnonce and nonce-count MUST be sent with
> it.
>
> The PABX seems to be requiring auth with qop=auth and cnonce/nonce-count
> returned.
>
> It would probably be good practice nonetheless to include these in auth
> responses?
>
> jauth.c/eXosip_create_authorization_header() sets CNonce to NULL but does
> pass Qop and NonceCount into the digest calculation.
>
> DigestCalcResponse() has some code that used these for qop=auth-int, and
> it looks wrong that it also applies this to qop=auth. But anyway, I don't
> think any of that code is compiled in at present.
>
> libosip seems to have enough support for adding qop/cnonce/nc to the
> response header but I'm not sure how to go about choosing a valid value
> for cnonce.
>
> I'm not really sure how to proceed. What do others know about this?
>
>
> Dermot.
> --
>
>
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