ó *oPc@`südZddlmZmZddlZddlZddlZddlZddlm Z e eddƒZ e r€e jZn d„Zdefd„ƒYZd efd „ƒYZd efd „ƒYZeƒZejZejZ[d ddgZdS(sQ Cryptographically secure random implementation, with fallback on normal random. i(tdivisiontabsolute_importN(t_PY3t getrandbitscC`s |jdƒS(Nthex(tdecode(thexBytes((sJ/var/www/html/hlstest/hls-proxy/Twisted-13.2.0/twisted/python/randbytes.pyt_fromhexstSecureRandomNotAvailablecB`seZdZRS(sD Exception raised when no secure random algorithm is found. (t__name__t __module__t__doc__(((sJ/var/www/html/hlstest/hls-proxy/Twisted-13.2.0/twisted/python/randbytes.pyRstSourceNotAvailablecB`seZdZRS(sQ Internal exception used when a specific random source is not available. (R R R (((sJ/var/www/html/hlstest/hls-proxy/Twisted-13.2.0/twisted/python/randbytes.pyR st RandomFactorycB`s}eZdZdZeZd„Zed„Zd„Ze rQe j Z d„Z nej Z d„Z e ddƒZd„ZRS( sů Factory providing L{secureRandom} and L{insecureRandom} methods. You shouldn't have to instantiate this class, use the module level functions instead: it is an implementation detail and could be removed or changed arbitrarily. cC`s=ytj|ƒSWn%ttfk r8}t|ƒ‚nXdS(sO Wrapper around C{os.urandom} that cleanly manage its absence. N(tosturandomtAttributeErrortNotImplementedErrorR (tselftnbyteste((sJ/var/www/html/hlstest/hls-proxy/Twisted-13.2.0/twisted/python/randbytes.pyt _osUrandom5scC`say|j|ƒSWntk r$nX|rQtjddtddƒ|j|ƒStdƒ‚dS(sk Return a number of secure random bytes. @param nbytes: number of bytes to generate. @type nbytes: C{int} @param fallback: Whether the function should fallback on non-secure random or not. Default to C{False}. @type fallback: C{bool} @return: a string of random bytes. @rtype: C{str} sPurandom unavailable - proceeding with non-cryptographically secure random sourcetcategoryt stacklevelis!No secure random source availableN(RR twarningstwarntRuntimeWarningtinsecureRandomR(RRtfallback((sJ/var/www/html/hlstest/hls-proxy/Twisted-13.2.0/twisted/python/randbytes.pyt secureRandom?s   cC`sN|jdk r>|j|dƒ}d|d|}t|ƒStdƒ‚dS(s3 Wrapper around C{os.getrandbits}. is%%0%dxis#random.getrandbits is not availableN(RtNoneRR (RRtnR((sJ/var/www/html/hlstest/hls-proxy/Twisted-13.2.0/twisted/python/randbytes.pyt _randBits\s  cC`s;djgt|ƒD]!}ttj|jƒgƒ^qƒS(s> Wrapper around the C{random} module. t(tjointrangetbytestrandomtchoicet_BYTES(RRti((sJ/var/www/html/hlstest/hls-proxy/Twisted-13.2.0/twisted/python/randbytes.pyt _randModuleiscC`s2djgt|ƒD]}tj|jƒ^qƒS(s> Wrapper around the C{random} module. R!(R"R#R%R&R'(RRR(((sJ/var/www/html/hlstest/hls-proxy/Twisted-13.2.0/twisted/python/randbytes.pyR)qsR!cC`s@x9dD]1}yt||ƒ|ƒSWqtk r7qXqWdS(sŇ Return a number of non secure random bytes. @param nbytes: number of bytes to generate. @type nbytes: C{int} @return: a string of random bytes. @rtype: C{str} R R)N(s _randBitss _randModule(tgetattrR (RRtsrc((sJ/var/www/html/hlstest/hls-proxy/Twisted-13.2.0/twisted/python/randbytes.pyR{s  ((R R R t randomSourcesRRtFalseRR RR$t maketranst _maketransR)tstringR'R(((sJ/var/www/html/hlstest/hls-proxy/Twisted-13.2.0/twisted/python/randbytes.pyR &s      RR(R t __future__RRRRR%R0ttwisted.python.compatRR*RRR$tfromhexRt RuntimeErrorRR tobjectR tfactoryRRt__all__(((sJ/var/www/html/hlstest/hls-proxy/Twisted-13.2.0/twisted/python/randbytes.pyts0  g