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PyCrypto v2.1.0.alpha2 Release Notes 

  • * Modified isPrime() to release the global interpreter lock while
  performing computations. (patch from Lorenz Quack)

* Release the GIL while encrypting, decrypting, and hashing (but not
  during initialization or finalization).

* API changes:

  - Removed RandomPoolCompat and made Crypto.Util.randpool.RandomPool
    a wrapper around Crypto.Random that emits a DeprecationWarning.
    This is to discourage developers from attempting to provide
    backwards compatibility for systems where there are NO strong
    entropy sources available.

  - Added Crypto.Random.get_random_bytes().  This should allow people
    to use something like this if they want backwards-compatibility:

        try:
             from Crypto.Random import get_random_bytes
        except ImportError:
             try:
                 from os import urandom as get_random_bytes
             except ImportError:
                 get_random_bytes = open("/dev/urandom", "rb").read

  - Implemented __ne__() on pubkey, which fixes the following broken
    behaviour:
        >>> pk.publickey() == pk.publickey()
        True
        >>> pk.publickey() != pk.publickey()
        True
    (patch from Lorenz Quack)

  - Block ciphers created with MODE_CTR can now operate on strings of
    any size, rather than just multiples of the underlying cipher's
    block size.

  - Crypto.Util.Counter objects now raise OverflowError when they wrap
    around to zero.  You can override this new behaviour by passing
    allow_wraparound=True to Counter.new()