I don't really understand who fails to do what ... but in any case, if
MD5 is the default, neither openser proxy or the phone sending the
invite should complain for a missing algorithm=MD5 parameter ... both
should simply assume this value unless specified otherwise ... thus,
the phone, when re-sending the INV with the authentication material,
it should do so with MD5 algorithm ...


Cesc

On 2/1/07, Bruno Machado <[EMAIL PROTECTED]> wrote:

The section 3.2.1 (The WWW-Authenticate Response Header) from RFC 2617 says:

"algorithm
 A string indicating a pair of algorithms used to produce the digest
 and a checksum. If this is not present it is assumed to be "MD5".
"

I send a INVITE to Openser but it send back a 407 (Proxy Authentication).
The parameter response was OK. But, without the parameter 'algorithm', the
proxy
didn't allow the authentication. It neither consult at Radius.
Looking at the RFC above, the SIP proxy must to use MD5 by default, but it
don't accept the message without the parameter. Who needs to assume the
algorithm?
UAC or SIP Proxy?

Can it be a bug of OpenSER? Or my interpretation is
 wrong?

Best regards.

Bruno Machado




----- Mensagem original ----
De: Bogdan-Andrei Iancu <[EMAIL PROTECTED]>
Para: Bruno Machado <[EMAIL PROTECTED]>
Cc: [email protected]
Enviadas: Segunda-feira, 29 de Janeiro de 2007 14:21:31
Assunto: Re: [Users] 407 and algorithm=MD5

Hi Bruno,

you cannot configure to have the algorithm param added. If I'm not
wrong, the digest RFC says this is an optional param and the default
value is MD5.

regards,
bogdan

Bruno Machado wrote:

> Hi.
>
> When I use the function proxy_challenge(), the 407 don't have the
> parameter 'algorithm=MD5'. Look below:
>
> ...
> Proxy-Authenticate: Digest realm="proxy.com.br",
> nonce="45be00f941f137ff037436c77f80a9531a02155f".
> ...
>
> How can I put this parameter in digest informations?
>
> ...
> Proxy-Authenticate: Digest realm="proxy.com.br",
> nonce="45be00f941f137ff037436c77f80a9531a02155f",
> algorithm="MD5".
> ...
>
>
> Thanks in advance.
>
> Bruno
>
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