openid / openid/OpenID4VP

Clarify mismatch between dcql_query.credentials[*].format and vp_formats_supported verifier metadata

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Description

There may be edge cases cases where the verifier sends a redirect-based OID4VP request to the wallet that requires vp_formats_supported with a list of VP formats that don't include any or all of the dcql_query.credentials[*].format attributes. It is undefined what the wallet should do in this case.

Should we assume the wallet returns an vp_formats_not_supported error or not return anything (which is always possible)? We could include this error condition as an additional item in the list of failure cases for vp_formats_not_supported error.

Any thoughts @c2bo @jogu @GarethCOliver @TimoGlastra ?

Contributor guide

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First steps

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Research direction

No file or test is named. Start by reviewing the vp_formats_not_supported failure cases and the mismatch between dcql_query.credentials[*].format and vp_formats_supported; done means the expected wallet behavior for this edge case is decided and documented.

Written by the indexing model from the issue text.

Assessment

Domain
authentication, security
Issue type
Documentation
Difficulty
5/5
Estimated time
Over a week
Activity status
Active
Clarity
Needs clarification
Newbie friendliness
35/100

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