Edit File: rand.py
""" PRNG management routines, thin wrappers. """ from OpenSSL._util import lib as _lib def add(buffer, entropy): """ Mix bytes from *string* into the PRNG state. The *entropy* argument is (the lower bound of) an estimate of how much randomness is contained in *string*, measured in bytes. For more information, see e.g. :rfc:`1750`. This function is only relevant if you are forking Python processes and need to reseed the CSPRNG after fork. :param buffer: Buffer with random data. :param entropy: The entropy (in bytes) measurement of the buffer. :return: :obj:`None` """ if not isinstance(buffer, bytes): raise TypeError("buffer must be a byte string") if not isinstance(entropy, int): raise TypeError("entropy must be an integer") _lib.RAND_add(buffer, len(buffer), entropy) def status(): """ Check whether the PRNG has been seeded with enough data. :return: 1 if the PRNG is seeded enough, 0 otherwise. """ return _lib.RAND_status()
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