|
|
- """
- 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()
|
