Crockford modified - origins?

alanblevins / anybase32

Encode and decode base32 strings using arbitrary alphabets

MIT License

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Crockford modified - origins? #1

Closed MartinFalatic closed 6 years ago

MartinFalatic commented 6 years ago

Do you happen to know anything about the origin and use of the modified Crockford alphabet?

b"0123456789abcdefghjkmnpqrtuvwxyz"

I have stumbled on it in a few places (where the encoding didn't come out quite as one would expect with the usual Crockford translation) but I can't find a canonical source for this modified version alphabet and why it even exists.

alanblevins commented 6 years ago

I'm afraid I don't know how that alphabet came about.

Interestingly enough, this package started as a way to translate modified Crockford, because I found an interface that was outputting base32 using that alphabet and there didn't seem to be any existing Python packages that handled it natively. And then I thought this might be more useful as a generalized implementation rather than just supporting modified Crockford, and here we are...

MartinFalatic commented 6 years ago

I managed to back-calculate it based on the weird output I was getting from one online tool, but I don't know why anyone uses it. Then I found yours so at least someone acknowledges it's unusual. Thanks!