Subject: [SIP] Consultation on CNonce

From: james jack <[email-masked]>
Date: Wed, 31 Jan 2001 03:29:59 -0800 (PST)

Dear All:
   I have read RFC2617(HTTP authentication), where for
Digest Authorization,  the format is listed as the
following:
       credentials      = "Digest" digest-response
       digest-response  = 1#(username | realm | nonce
| digest-uri
                       | response | [algorithm] |
[cnonce] |
                       [opaque] | [message-qop] |
                       [nonce-count]  | [auth-param])

       username         = "username" "="
username-value
       username-value   = quoted-string
       digest-uri       = "uri" "=" digest-uri-value
       digest-uri-value = Request-Uri   
       message-qop      = "qop" "=" qop-value
       cnonce           = "cnonce" "=" cnonce-value
       cnonce-value     = nonce-value
       nonce-count      = "nc" "=" nc-value
       nc-value         = 8LHEX
       response         = "response" "="
request-digest
       request-digest = <"> 32LHEX <">
       LHEX             =  "0" | "1" | "2" | "3" |
                                  "4" | "5" | "6" |
"7" |
                                 "8" | "9" | "a" | "b"
|
                                 "c" | "d" | "e" | "f"

There is no narration on the generation of CNonce,
according to my understanding, will this CNonce will
be given by any random string?

 Could anyone give me some suggestion and idea?
 Best Regards!
                  Yours: James

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