rehash 0.1.0

Rehash is a resumable interface to the OpenSSL-based hashers in the CPython hashlib standard library. Rehash provides hashers that can be pickled, reconstituted from their repr(), and otherwise serialized. The rest of the Rehash API is identical to hashlib.

Rehash hashers can be used to checkpoint and restore progress when hashing large byte streams:

import pickle, rehash
hasher = rehash.sha256(b"foo")
state = pickle.dumps(hasher)

hasher2 = pickle.loads(state)
hasher2.update(b"bar")

assert hasher2.hexdigest() == rehash.sha256(b"foobar").hexdigest()

License

Licensed under the terms of the Apache License, Version 2.0.