This module implements a common interface to many different secure hash and message digest algorithms. Included are the FIPS secure hash algorithms SHA1, SHA224, SHA256, SHA384, and SHA512 (defined in FIPS 180-2) as well as RSA’s MD5 algorithm (defined in Internet RFC 1321).
SHA1 and MD5 algorithms are not currently supported by the CircuitPython module, but constructors/sub-modules are included in the library to retain backwards-compatibility with the CPython3 `hashlib` module's available algorithms.
To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).
Read the [docs](http://circuitpython.readthedocs.io/projects/hashlib/en/latest/) for info on how to use it.