Just a quick suggestion, and apologies if this was already obvious:

If you do go ahead with the key auto-hashing, providing a method to bypass it and set the raw key will help keep people from tearing their hair out when writing code that must interoperate with existing data, or other languages.

In reply to Re: What you want in a crypto API. by saucepan
in thread What you want in a crypto API. by rpc

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