ó [³XMc@sYdZddlmZmZied6ed6ed6Zd d„Zd„Zd„Zd S( s^ Calculations for HTTP Digest authentication. @see: U{http://www.faqs.org/rfcs/rfc2617.html} iÿÿÿÿ(tmd5tsha1Rsmd5-sesstshac Cs|r'|s|s|r'tdƒ‚n|dkrt|ƒ}|j|ƒ|jdƒ|j|ƒ|jdƒ|j|ƒ|jƒ}n|jdƒ}|dkrt|ƒ}|j|ƒ|jdƒ|j|ƒ|jdƒ|j|ƒ|jƒ}n|jdƒS(s: Compute H(A1) from RFC 2617. @param pszAlg: The name of the algorithm to use to calculate the digest. Currently supported are md5, md5-sess, and sha. @param pszUserName: The username @param pszRealm: The realm @param pszPassword: The password @param pszNonce: The nonce @param pszCNonce: The cnonce @param preHA1: If available this is a str containing a previously calculated H(A1) as a hex string. If this is given then the values for pszUserName, pszRealm, and pszPassword must be C{None} and are ignored. sPpreHA1 is incompatible with the pszUserName, pszRealm, and pszPassword argumentst:thexsmd5-sessN(t TypeErrortNonet algorithmstupdatetdigesttdecodetencode( tpszAlgt pszUserNametpszRealmt pszPasswordtpszNoncet pszCNoncetpreHA1tmtHA1((s8/usr/lib/python2.7/dist-packages/twisted/cred/_digest.pytcalcHA1!s(              cCspt|ƒ}|j|ƒ|jdƒ|j|ƒ|dkr]|jdƒ|j|ƒn|jƒjdƒS(s÷ Compute H(A2) from RFC 2617. @param pszAlg: The name of the algorithm to use to calculate the digest. Currently supported are md5, md5-sess, and sha. @param pszMethod: The request method. @param pszDigestUri: The request URI. @param pszQop: The Quality-of-Protection value. @param pszHEntity: The hash of the entity body or C{None} if C{pszQop} is not C{'auth-int'}. @return: The hash of the A2 value for the calculation of the response digest. Rsauth-intR(RRR R (talgot pszMethodt pszDigestUritpszQopt pszHEntityR((s8/usr/lib/python2.7/dist-packages/twisted/cred/_digest.pytcalcHA2Ps      c CsÄt|ƒ}|j|ƒ|jdƒ|j|ƒ|jdƒ|rž|rž|j|ƒ|jdƒ|j|ƒ|jdƒ|j|ƒ|jdƒn|j|ƒ|jƒjdƒ}|S(s Compute the digest for the given parameters. @param HA1: The H(A1) value, as computed by L{calcHA1}. @param HA2: The H(A2) value, as computed by L{calcHA2}. @param pszNonce: The challenge nonce. @param pszNonceCount: The (client) nonce count value for this response. @param pszCNonce: The client nonce. @param pszQop: The Quality-of-Protection value. RR(RRR R ( RtHA2RRt pszNonceCountRRRtrespHash((s8/usr/lib/python2.7/dist-packages/twisted/cred/_digest.pyt calcResponsehs            N( t__doc__ttwisted.python.hashlibRRRRRRR(((s8/usr/lib/python2.7/dist-packages/twisted/cred/_digest.pyt s   .