ó BwLc@s™dZddlTddlmZddlZddlZddlmZddlZddl Z de fd„ƒYZ d„Z d e fd „ƒYZ dS( s$Id$iÿÿÿÿ(t*(tb2a_hexN(tClockRewindWarningt FortunaPoolcBsDeZdZejZd„Zd„Zd„Zd„Zd„Z RS(sgFortuna pool type This object acts like a hash object, with the following differences: - It keeps a count (the .length attribute) of the number of bytes that have been added to the pool - It supports a .reset() method for in-place reinitialization - The method to add bytes to the pool is .append(), not .update(). cCs|jƒdS(N(treset(tself((sL/usr/lib/python2.7/dist-packages/Crypto/Random/Fortuna/FortunaAccumulator.pyt__init__3scCs)|jj|ƒ|jt|ƒ7_dS(N(t_htupdatetlengthtlen(Rtdata((sL/usr/lib/python2.7/dist-packages/Crypto/Random/Fortuna/FortunaAccumulator.pytappend6scCs |jjƒS(N(Rtdigest(R((sL/usr/lib/python2.7/dist-packages/Crypto/Random/Fortuna/FortunaAccumulator.pyR :scCst|jƒƒS(N(RR (R((sL/usr/lib/python2.7/dist-packages/Crypto/Random/Fortuna/FortunaAccumulator.pyt hexdigest=scCstjƒ|_d|_dS(Ni(tSHAd256tnewRR (R((sL/usr/lib/python2.7/dist-packages/Crypto/Random/Fortuna/FortunaAccumulator.pyR@s( t__name__t __module__t__doc__Rt digest_sizeRR R RR(((sL/usr/lib/python2.7/dist-packages/Crypto/Random/Fortuna/FortunaAccumulator.pyR&s      cCsh|dkst‚g}d}xCtdƒD]5}||@dkrQ|j|ƒnP|d>dB}q+W|S(s?Return a list of pools indexes (in range(32)) that are to be included during reseed number r. According to _Practical Cryptography_, chapter 10.5.2 "Pools": "Pool P_i is included if 2**i is a divisor of r. Thus P_0 is used every reseed, P_1 every other reseed, P_2 every fourth reseed, etc." iii l(tAssertionErrortrangeR (trtretvaltmaskti((sL/usr/lib/python2.7/dist-packages/Crypto/Random/Fortuna/FortunaAccumulator.pyt which_poolsDs tFortunaAccumulatorcBs;eZdZdZd„Zd„Zdd„Zd„ZRS(i@gš™™™™™¹?cCsjd|_tjƒ|_d|_gtdƒD]}tƒ^q.|_|jd|jdk sft ‚dS(Nii i( t reseed_counttFortunaGeneratort AESGeneratort generatortNonet last_reseedRRtpoolsR(RR((sL/usr/lib/python2.7/dist-packages/Crypto/Random/Fortuna/FortunaAccumulator.pyR^s   %cCs•tjƒ}|j|kr7tjdtƒd|_n|jdj|jkr…|jdksu||j|j kr…|j |ƒn|j j |ƒS(Ns-Clock rewind detected. Resetting last_reseed.i( ttimeR"twarningstwarnRR!R#R t min_pool_sizetreseed_intervalt_reseedR tpseudo_random_data(Rtbytest current_time((sL/usr/lib/python2.7/dist-packages/Crypto/Random/Fortuna/FortunaAccumulator.pyt random_datajs  cCs¡|dkrtjƒ}ng}|jd7_||_xBt|jƒD]1}|j|j|jƒƒ|j|jƒqIWdj |ƒ}|j j |ƒdS(Nit( R!R$RR"RR R#R RtjoinR treseed(RR,tseedR((sL/usr/lib/python2.7/dist-packages/Crypto/Random/Fortuna/FortunaAccumulator.pyR)vs  cCs¾dt|ƒkodkns(t‚d|ko?dknsJt‚d|koadknslt‚|j|jt|ƒƒ|j|jtt|ƒƒƒ|j|j|ƒdS(Nii iiÿi(R RR#R tchr(Rt source_numbert pool_numberR ((sL/usr/lib/python2.7/dist-packages/Crypto/Random/Fortuna/FortunaAccumulator.pytadd_random_eventƒs ("" N( RRR'R(RR-R!R)R5(((sL/usr/lib/python2.7/dist-packages/Crypto/Random/Fortuna/FortunaAccumulator.pyRYs  (t __revision__tCrypto.Util.python_compattbinasciiRR$R%tCrypto.pct_warningsRRRtobjectRRR(((sL/usr/lib/python2.7/dist-packages/Crypto/Random/Fortuna/FortunaAccumulator.pyts