Advanced hashing params

[aaronsteers]

I want to propose some advanced hashing capabilities. Essentially the goals of these features are that: the process is 100% repeatable when it should be repeatable, and 100% non-repeatable when it shouldn't be repeatable.

Here is some sample code - but basically would like to be able to override (1) the hashing algorithm (MD5, SHA, etc.) and (2) a secret seed value to concatenate before hashing, which would prevent the process to be repeatable by persons who did not have the secret seed.

Is this agreeable? This is not a huge priority for me, but it would be a nice addition, and I would be happy to submit a PR if it sounds like a good direction overall.

[aaronsteers]

import hashlib

HASH_FUNCTIONS = {"MD5": hashlib.md5, "SHA256": hashlib.sha256, "SHA512": hashlib.sha512}

def hash_fn(clear_value):
    fn = HASH_FUNCTIONS[config.get("hash_function", "")]
    hash_seed = config.get("hash_seed", "")
    return fn(f"{hash_seed}{clear_value}".encode("utf-8")).hexdigest()

transform():
    ...
    hashed_value = hash_fn(clear_value)
    ...

This is pulled from another project and I didn't do a lot to refactor so it might feel a tiny bit awkward. Still, hopefully it gives a good idea.