SdJwt.Net.VcDm 1.0.6

SdJwt.Net.VcDm

W3C Verifiable Credentials Data Model 2.0 typed models, validation, and serialization for .NET.

Overview

This package provides a pure data-model layer for W3C VC Data Model 2.0. It is distinct from SdJwt.Net.Vc, which implements the IETF SD-JWT VC specification (draft-ietf-oauth-sd-jwt-vc) — a parallel, non-normatively-aligned credential format that does not use JSON-LD or W3C VCDM semantics.

This package handles:

• jwt_vc_json — W3C VCDM 2.0 credential payload wrapped in a JWT
• ldp_vc — W3C VCDM 2.0 credential with embedded Data Integrity proof

Use SdJwt.Net.Vc for:

• dc+sd-jwt — IETF SD-JWT VC (selective disclosure, no JSON-LD)

Credential Format Map

Quick Start

using SdJwt.Net.VcDm.Models;
using SdJwt.Net.VcDm.Validation;

// Build a W3C Verifiable Credential
var credential = new VerifiableCredential
{
    Context = [VcDmContexts.V2, "https://schema.org/"],
    Type = ["VerifiableCredential", "UniversityDegreeCredential"],
    Id = "https://example.edu/credentials/3732",
    Issuer = new Issuer("https://example.edu/issuers/14"),
    ValidFrom = DateTimeOffset.UtcNow,
    CredentialSubject = new CredentialSubject
    {
        Id = "did:example:ebfeb1f712ebc6f1c276e12ec21",
        AdditionalClaims = new Dictionary<string, object>
        {
            ["degree"] = new { type = "BachelorDegree", name = "Bachelor of Science" }
        }
    }
};

// Validate the credential structure
var validator = new VcDmValidator();
var result = validator.Validate(credential);
if (!result.IsValid)
    Console.WriteLine(string.Join(", ", result.Errors));

// Serialize to JSON
var json = JsonSerializer.Serialize(credential, VcDmSerializerOptions.Default);

Key Classes

VCDM 1.1 Backward Compatibility

The library reads (but does not write) the deprecated VCDM 1.1 properties:

What This Package Does NOT Do

• No JSON-LD @context expansion or RDF processing (requires json-ld.net or equivalent)
• No Data Integrity proof generation or verification (requires ecdsa-rdfc-2019 / bbs-2023 suite)
• No JWT signing or verification (use System.IdentityModel.Tokens.Jwt)

License

Apache-2.0 — OpenWallet Foundation Labs