Re: [webauthn] Add more requirements for ClientDataJSON serialisation. (#1375)

in 2020-02-26 meeting, feedback is that this needs further Note:/comments targeted at implementers that:
* full JSON parser is preferred impl
* add a validators' algorithm for those who wish to take advantage of the special sauce this limited & deterministic encoding provides
    * this alg needs to be crafted such that futue extensions to clientDataJSON  client platforms may employ will not break existing 
* add further explanation of the "hooks" this provides, eg fixed ordering of the fixed four key-value pairs, etc.
* explicitly state that these four fields are fixed forever, we can never change them in future spec versions
* explain the consequences of any future fifth (or more) key-value pairs added to the spec in terms of new browsers and RPs --- (consideration: overall in webauthn we're commiting to not make bkwards incompatible changes)
* perhaps more to add here....



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Received on Wednesday, 26 February 2020 20:20:11 UTC