Extract secret from otpauth uri

[samueltardieu]

This extracts the secret from an otpauth:// URI.

[samueltardieu]

Since this information comes from outside, a lot of checks are done to ensure that this is a valid URI. Should a less strict parsing be required in some contexts, a simple URI.parse(uri).query |> URI.decode_query() |> Map.get("secret") without any verification should do the job.

[samueltardieu]

Setting to draft, I want to double-check that labels are mandatory

[josevalim]

Thank you @samueltardieu! I am starting to wonder if it should be part of this library, as we mostly concern ourselves with generating TOTPs...

[samueltardieu]

Yes, it is mandatory.

[samueltardieu]

Thank you @samueltardieu! I am starting to wonder if it should be part of this library, as we mostly concern ourselves with generating TOTPs...

My use case was to programatically access a service for which I had to enter a TOTP. I could indeed use this version in my own service, or release an extra library, since all the functions from NimbleTOTP that are used inside are public. As you wish.

[josevalim]

Hi @samueltardieu! Thank you for the contributions but yes, I think this is a bit outside of NimbleTOTP for now. I appreciate the time and you sharing the code with us though. ❤️