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ABNF for  WWW-Authenticate  SIP Header

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3GPP TS 24.229 – Section 7.2A.1     RFC 3261 – Section 20.44

 


WWW-Authenticate   =
"WWW-Authenticate"   HCOLON   challenge

; SIP example:
;    WWW-Authenticate: Digest realm="atlanta.example.com", qop="auth",
;      nonce="84f1c1ae6cbe5ua9c8e88dfa3ecm3459",
;      opaque="", stale=FALSE, algorithm=MD5


auth-param   =
integrity-key   =
"ik"   EQUAL   ik-value

cipher-key   =
"ck"   EQUAL   ck-value

ik-value   =
LDQUOT   *( HEXDIG )   RDQUOT

ck-value   =
LDQUOT   *( HEXDIG )   RDQUOT

; IMS example:
;    SIP/2.0 401 Unauthorized
;    ...
;    WWW-Authenticate: Digest realm="registrar.home1.net",
;      nonce=base64(RAND + AUTN + server specific data),
;      algorithm=AKAv1-MD5,
;      ik="00112233445566778899aabbccddeeff",
;      ck="ffeeddccbbaa11223344556677889900"
;    CSeq: 1 REGISTER