LDP VC/VP Verification: create URI-equality comparison that ignores the fragment

[paullatzelsperger]

Feature Request

the VC/VP Data Integrity specification requires in numerous places, that two URIs be the same, for example the issuer and the verificationMethod contained in the proof object. These items typically are URIs.

Normally, the issuer would contain the general resource identifier, e.g. did:web:the-issuer, while the verification method would contain a URI fragment, indicating the key material used to create the proof, e.g. did:web:the-issuer#signing-key-1.

Using the JDKs URI#equals method will always fail in those cases, because it will include the fragment.

Thus, we need our use-case specific URI comparison.

Which Areas Would Be Affected?

VC/VP verification

Why Is the Feature Desired?

Compliance with the spec.

Solution Proposal

convert the URIs to a string, chop off the fragment, perform string equals comparison.