Subject: [Sip] Authentication-Info header: Who can add it to a 2xx response

From: [email-masked]
Date: Fri, 24 Oct 2003 13:51:45 +0300

Can a proxy add an Authentication-info header to a 2xx response it did not create, if it had earlier responded with a 407?

If the answer is yes, then I would think that the client needs to create a cnonce that is unique for every digest-response to a challenge, and consequently, it must be mandated for the proxy reflect this cnonce is the Authentication-info header.

If the answer is no, then why is there allowed multiple authentication-info headers (See ABNF)?

Thanks,
Hisham

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