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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
; HTTP digest authentication (2617) - ABNF
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;; 1.2 Access Authentication Framework
auth-scheme = token
auth-param = token "=" ( token | quoted-string )
challenge = auth-scheme 1*SP 1#auth-param
realm = "realm" "=" realm-value
realm-value = quoted-string
;;;; 2 Basic Authentication Scheme
challenge = "Basic" realm
credentials = "Basic" basic-credentials
basic-credentials = base64-user-pass
base64-user-pass = token ;<base64 [4] encoding of user-pass, except not limited to 76 char/line>
user-pass = userid ":" password
userid = *TEXT ;*<TEXT excluding ":">
password = *TEXT
;;;; 3.2.1 The WWW-Authenticate Response Header
challenge = "Digest" digest-challenge
digest-challenge = 1#( realm | [ domain ] | nonce | [ opaque ] |[ stale ] | [ algorithm ] | [ qop-options ] | [auth-param] )
domain = "domain" "=" <"> URI ( 1*SP URI ) <">
URI = absoluteURI | abs_path
nonce = "nonce" "=" nonce-value
nonce-value = quoted-string
opaque = "opaque" "=" quoted-string
stale = "stale" "=" ( "true" | "false" )
algorithm = "algorithm" "=" ( "MD5" | "MD5-sess" | token )
qop-options = "qop" "=" <"> 1#qop-value <">
qop-value = "auth" | "auth-int" | token
;;;; 3.2.2 The Authorization Request Header
credentials = "Digest" digest-response
digest-response = 1#( username | realm | nonce | digest-url | response | [ algorithm ] | [cnonce] | [opaque] | [message-qop] | [nonce-count] | [auth-param] )
username = "username" "=" username-value
username-value = quoted-string
digest-url = "url" "=" digest-url-value
digest-url-value = request-url ; As specified by HTTP/1.1
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 = DQUOTE 32LHEX DQUOTE
LHEX = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" | "a" | "b" | "c" | "d" | "e" | "f"
;;;; 3.2.3 The Authentication-Info Header
AuthenticationInfo = "Authentication-Info" ":" auth-info
auth-info = 1#(nextnonce | [ message-qop ] | [ response-auth ] | [ cnonce ] | [nonce-count] )
nextnonce = "nextnonce" "=" nonce-value
response-auth = "rspauth" "=" response-digest
response-digest = DQUOTE *LHEX DQUOTE
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