Handling of an unrecognized client identifier prefix

OID4VP 1.0 §5.9.2MAYRoles: wallet

Requirement as recorded in the ProtocolSoup registry

If a ":" character is present in the Client Identifier but the value preceding it is not a recognized and supported Client Identifier Prefix value, the Wallet can treat the Client Identifier as referring to a pre-registered client or it may refuse the request.

Read §5.9.2 in OID4VP 1.0

Self-test verdict

PassCommit 97df6a8Evaluated 2026-10-11

This is ProtocolSoup's result against its own implementation at the commit shown. It is not a certification of ProtocolSoup or of any other product.

Tests

TestParseClientIDSchemeUsesFinalPrefixFallback
./internal/protocols/oid4vp
Pass

Implementation

backend/internal/protocols/oid4vp/contracts.go

Related requirements

VP-001Client identifier prefix detection by colon VP-004GET request_uri returns the compact signed authorization request

All OID4VP 1.0 requirements · OID4VP protocol page