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Current File : /usr/lib/python2.6/site-packages/Crypto/Util/randpool.pyc
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d„Zd„Zd„Zd	d„ZRS(s1randpool.py : Cryptographically strong random number generation.

    The implementation here is similar to the one in PGP.  To be
    cryptographically strong, it must be difficult to determine the RNG's
    output, whether in the future or the past.  This is done by using
    a cryptographic hash function to "stir" the random data.

    Entropy is gathered in the same fashion as PGP; the highest-resolution
    clock around is read and the data is added to the random number pool.
    A conservative estimate of the entropy is then kept.

    If a cryptographically secure random source is available (/dev/urandom
    on many Unixes, Windows CryptGenRandom on most Windows), then use
    it.

    Instance Attributes:
    bits : int
      Maximum size of pool in bits
    bytes : int
      Maximum size of pool in bytes
    entropy : int
      Number of bits of entropy in this pool.

    Methods:
    add_event([s]) : add some entropy to the pool
    get_bytes(int) : get N bytes of random data
    randomize([N]) : get N bytes of randomness from external source
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        Add an event to the random pool.  The current time is stored
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