ó zfc@s¸dZddlZddlmZdjgedƒD]Ze edAƒ^q5ƒZ djgedƒD]Ze edAƒ^qgƒZ dZ gZdd d „ƒYZddd „ZdS( sxHMAC (Keyed-Hashing for Message Authentication) Python module. Implements the HMAC algorithm as described by RFC 2104. iÿÿÿÿN(t_compare_digesttii\i6tHMACcBsPeZdZdZddd„Zd„Zd„Zd„Zd„Z d„Z RS( s~RFC 2104 HMAC class. Also complies with RFC 4231. This supports the API for Cryptographic Hash Functions (PEP 247). i@cs§|tkrdSˆdkr4ddl}|j‰ntˆdƒrOˆ|_nd‡fd†|_|jƒ|_|jƒ|_|jj|_t|jdƒrê|jj }|dkr t j d||j ft d ƒ|j }q n#t j d |j t d ƒ|j }t|ƒ|kr7|j|ƒjƒ}n|td ƒ|t|ƒ}|jj|jtƒƒ|jj|jtƒƒ|dk r£|j|ƒndS( s9Create a new HMAC object. key: key for the keyed hash object. msg: Initial input for the hash, if provided. digestmod: A module supporting PEP 247. *OR* A hashlib constructor returning a new hash object. Defaults to hashlib.md5. Niÿÿÿÿt__call__Rcs ˆj|ƒS(N(tnew(td(t digestmod(s/usr/lib64/python2.7/hmac.pyt2Rt block_sizeis:block_size of %d seems too small; using our default of %d.is<No block_size attribute on given digest object; Assuming %d.i(t_secret_backdoor_keytNonethashlibtmd5thasattrt digest_constoutertinnert digest_sizeRt _warningstwarnt blocksizetRuntimeWarningtlentdigesttchrtupdatet translatettrans_5Cttrans_36(tselftkeytmsgRR R((Rs/usr/lib64/python2.7/hmac.pyt__init__s:              cCs|jj|ƒdS(s8Update this hashing object with the string msg. N(RR(RR((s/usr/lib64/python2.7/hmac.pyRSscCsO|jtƒ}|j|_|j|_|jjƒ|_|jjƒ|_|S(syReturn a separate copy of this hashing object. An update to this copy won't affect the original object. (t __class__R RRRtcopyR(Rtother((s/usr/lib64/python2.7/hmac.pyR"Xs   cCs)|jjƒ}|j|jjƒƒ|S(swReturn a hash object for the current state. To be used only internally with digest() and hexdigest(). (RR"RRR(Rth((s/usr/lib64/python2.7/hmac.pyt_currentdscCs|jƒ}|jƒS(söReturn the hash value of this hashing object. This returns a string containing 8-bit data. The object is not altered in any way by this function; you can continue updating the object after calling this function. (R%R(RR$((s/usr/lib64/python2.7/hmac.pyRms cCs|jƒ}|jƒS(sKLike digest(), but returns a string of hexadecimal digits instead. (R%t hexdigest(RR$((s/usr/lib64/python2.7/hmac.pyR&ws N( t__name__t __module__t__doc__RR R RR"R%RR&(((s/usr/lib64/python2.7/hmac.pyRs5  cCst|||ƒS(sVCreate a new hashing object and return it. key: The starting key for the hash. msg: if available, will immediately be hashed into the object's starting state. You can now feed arbitrary strings into the object using its update() method, and can ask for the hash value at any time by calling its digest() method. (R(RRR((s/usr/lib64/python2.7/hmac.pyR}s ((R)twarningsRtoperatorRtcompare_digesttjointxrangetxRRRR RR RR(((s/usr/lib64/python2.7/hmac.pyts 22f