Hi Sandip,
If it has quotes in the grammar, it means use it
without quotes in the actual header.
> algorithm = "algorithm" EQUAL ( "MD5" / "MD5-sess"
> / token )
So
algorithm=MD5
or
algorithm=MD5-sess
are both OK.
Note: if you use your rule for quotes then you
would get something like:
"algorithm"="MD5"
which is clearly not right.
Regards,
Attila
> -----Original Message-----
> From: sandip [mailto:[EMAIL PROTECTED]
> Sent: 16 September 2003 10:26
> To: [EMAIL PROTECTED]
> Subject: [Sip-implementors] WWW-Authenticate decoding problem
>
>
> Hi All,
> Got a problem with the decoding of WWW-Authenticate header.
>
> I think, for WWW-Authenticate header the grammer ( ABNF ) has
> contradiction
> with the example shown in RFC 3261 for the following parameters.
> 1. stale
> 2. algorithm
>
> For both of these challenge parameters, ABNF(page 231,section
> 25.1, RFC
> 3261) dictates the values for these are to be given as a double-quoted
> string. But the examples given in the RFC does not have a
> double-quoted
> value for those. So I am at confusion. This makes disorder
> resulting from a
> failure to behave predictably the header decoding.
>
> Please suggest me what to accept.
>
> TIA,
> Sandip
>
>
>
>
> Examples Given in RFC (3261) :
>
> WWW-Authenticate: Digest realm="atlanta.com",
> domain="sip:boxesbybob.com", qop="auth",
> nonce="f84f1cec41e6cbe5aea9c8e88d359",
> opaque="", stale=FALSE, algorithm=MD5
>
>
>
>
>
> BNF says the grammar for the header as :
>
> WWW-Authenticate = "WWW-Authenticate" HCOLON challenge
>
> challenge = ("Digest" LWS digest-cln *(COMMA digest-cln))
> / other-challenge
> other-challenge = auth-scheme LWS auth-param
> *(COMMA auth-param)
> digest-cln = realm / domain / nonce
> / opaque / stale / algorithm
> / qop-options / auth-param
> realm = "realm" EQUAL realm-value
> realm-value = quoted-string
> domain = "domain" EQUAL LDQUOT URI
> *( 1*SP URI ) RDQUOT
> URI = absoluteURI / abs-path
> nonce = "nonce" EQUAL nonce-value
> nonce-value = quoted-string
> opaque = "opaque" EQUAL quoted-string
> stale = "stale" EQUAL ( "true" / "false" )
> algorithm = "algorithm" EQUAL ( "MD5" / "MD5-sess"
> / token )
>
>
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>
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