Re: [Cbor] [Rats] Combining CBOR protocol libraries

[Thomas Fossati <[e-mail]>]

Hi Laurence,

On 20/05/2021, 20:38, "Laurence Lundblade" <[e-mail]> wrote:
> This is in the context of defining how CoSWID should be integrated
> into EAT <https://github.com/ietf-rats-wg/eat/pull/102>, but seems
> like a general CBOR protocol library implementation issue.  Let’s say
> you have a CoSWID library that uses tinyCBOR for CBOR decoding.
> Further let’s say all you have is a header and lib, no source. You
> have a .h file and a .a file.
>
> Same for an EAT implementation, but it uses QCBOR for CBOR decoding.
>
> I assume the input to the CoSWID decoding library is a binary byte
> string with the encoded CBOR. Can’t really be anything else, can it?
>
> How to you take the binary encoded CoSWID out of the EAT and feed it
> to the CoSWID library?

The CBOR library we use follows the glorious Golang institution of
providing the RawMessage type [1].

It goes both ways: you can use it to delay decoding or to pre-encode.

Maybe the C libraries could be extended to do something similar?

Cheers!

[1] https://github.com/fxamacker/cbor













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