Feature Request: MDoc/MDL PEX validation support

[cykoder]

• I'm submitting a ...
  [ ] bug report
  [ x] feature request
  [ ] question about the decisions made in the repository
  [ ] question about how to use this project

• Summary

Hello!

This library has been great for my PEX use cases, namely how it can verify that a presentation matches the request on the verifier side. Would this library be interested in supporting the same verification for MDoc/MDL credentials?

There are some tricky things to consider with that use case, namely what format is the input as some MDoc/MDL libs provide a different structure for the decoded and parsed credential.

• Other information (e.g. detailed explanation, stack traces, related issues, suggestions how to fix, links for us to have context, eg. StackOverflow, personal fork, etc.)

N/A

[nklomp]

Yes we will be adding support for mdl/mdoc soon. We already have a library that can actually support mdl/mdocs with PE in kotlin multiplatform and also in its typescript export. We will probably take some of it its types/interfaces and then make a peer dep on the mdl/mdoc typescript implementation.

[nklomp]

Btw we will probably follow iso 18013-7 as the basis, which is using PE in combination with OID4VC. In the sense that we will probably take base64url encoded issuerauth and deviceresponses as objects.

Since we also support bidirectional cose to jose conversions, I should be doable. Having said that, we will first do a direct integration into our oid4vc libs. The reason is that we already support it in our mdl/mdoc and PE for 18013-7 is so much simpler than for other credential formats, that we have chosen for this to become a 2 step process (oid4vc first, bypassing this lib for PE), then a proper integration into this lib

[cykoder]

@nklomp thanks for the quick response. this all sounds great, i dont have a rigid timeline on requiring this so whenever you can get around to it is good. id be happy to help but it sounds like you guys may have all bases covered here!