Modular credential format support for oid4vci

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jwt_vc_json/README.md

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+# JWT_VC_JSON credential format plugin
+
+This plugin provides `jwt_vc_json` credential support for the OID4VCI plugin. It acts as a module, dynamically loaded by the OID4VCI plugin, takes input parameters, and constructs and signs `jwt_vc_json` credentials.
+
+## Configuration:
+
+No configuration is required for this plugin.

jwt_vc_json/jwt_vc_json/__init__.py

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+"""jwt_vc_json credential handler plugin."""

jwt_vc_json/jwt_vc_json/v1_0/__init__.py

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+"""Initialize processor."""
+
+from .cred_processor import CredProcessor
+
+
+cred_processor = CredProcessor()

jwt_vc_json/jwt_vc_json/v1_0/cred_processor.py

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+"""Issue a jwt_vc_json credential."""
+
+import datetime
+import logging
+import uuid
+
+from aries_cloudagent.admin.request_context import AdminRequestContext
+from aries_cloudagent.wallet.jwt import jwt_sign
+
+from oid4vci.models.exchange import OID4VCIExchangeRecord
+from oid4vci.models.supported_cred import SupportedCredential
+from oid4vci.public_routes import types_are_subset
+from oid4vci.pop_result import PopResult
+from oid4vci.cred_processor import ICredProcessor, CredIssueError
+
+LOGGER = logging.getLogger(__name__)
+
+
+class CredProcessor(ICredProcessor):
+    """Credential processor class for jwt_vc_json format."""
+
+    async def issue_cred(
+        self,
+        body: any,
+        supported: SupportedCredential,
+        ex_record: OID4VCIExchangeRecord,
+        pop: PopResult,
+        context: AdminRequestContext,
+    ):
+        """Return signed credential in JWT format."""
+        if not types_are_subset(body.get("types"), supported.format_data.get("types")):
+            raise CredIssueError("Requested types does not match offer.")
+
+        current_time = datetime.datetime.now(datetime.timezone.utc)
+        current_time_unix_timestamp = int(current_time.timestamp())
+        formatted_time = current_time.strftime("%Y-%m-%dT%H:%M:%SZ")
+        cred_id = str(uuid.uuid4())
+
+        # note: Some wallets require that the "jti" and "id" are a uri
+        payload = {
+            "vc": {
+                **(supported.vc_additional_data or {}),
+                "id": f"urn:uuid:{cred_id}",
+                "issuer": ex_record.issuer_id,
+                "issuanceDate": formatted_time,
+                "credentialSubject": {
+                    **(ex_record.credential_subject or {}),
+                    "id": pop.holder_kid,
+                },
+            },
+            "iss": ex_record.issuer_id,
+            "nbf": current_time_unix_timestamp,
+            "jti": f"urn:uuid:{cred_id}",
+            "sub": pop.holder_kid,
+        }
+
+        jws = await jwt_sign(
+            context.profile,
+            {},
+            payload,
+            verification_method=ex_record.verification_method,
+        )
+
+        return jws

jwt_vc_json/jwt_vc_json/v1_0/tests/__init__.py

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+"""CredentialProcessor test."""

jwt_vc_json/jwt_vc_json/v1_0/tests/conftest.py

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+import pytest
+from unittest.mock import MagicMock
+
+from aries_cloudagent.admin.request_context import AdminRequestContext
+
+from oid4vci.models.exchange import OID4VCIExchangeRecord
+from oid4vci.models.supported_cred import SupportedCredential
+from oid4vci.public_routes import PopResult
+
+
+@pytest.fixture
+def body():
+    items = {"format": "jwt_vc_json", "types": ["OntarioTestPhotoCard"], "proof": {}}
+    mock = MagicMock()
+    mock.__getitem__ = lambda _, k: items[k]
+    yield mock
+
+
+@pytest.fixture
+def supported():
+    yield SupportedCredential(
+        format_data={"types": ["VerifiableCredential", "PhotoCard"]},
+        vc_additional_data={
+            "@context": [
+                "https://www.w3.org/2018/credentials/v1",
+                "https://issuer-controller1.stg.ngrok.io/url/schema/photo-card.jsonld",
+            ],
+            "type": ["VerifiableCredential", "PhotoCard"],
+        },
+    )
+
+
+@pytest.fixture
+def ex_record():
+    yield OID4VCIExchangeRecord(
+        state=OID4VCIExchangeRecord.STATE_OFFER_CREATED,
+        verification_method="did:example:123#key-1",
+        issuer_id="did:example:123",
+        supported_cred_id="456",
+        credential_subject={"name": "alice"},
+        nonce="789",
+        pin="000",
+        code="111",
+        token="222",
+    )
+
+
+@pytest.fixture
+def pop():
+    yield PopResult(
+        headers=None,
+        payload=None,
+        verified=True,
+        holder_kid="did:key:example-kid#0",
+        holder_jwk=None,
+    )
+
+
+@pytest.fixture
+def context():
+    """Test AdminRequestContext."""
+    yield AdminRequestContext.test_context()

jwt_vc_json/jwt_vc_json/v1_0/tests/test_cred_processor.py

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+import pytest
+from aries_cloudagent.admin.request_context import AdminRequestContext
+
+from oid4vci.models.exchange import OID4VCIExchangeRecord
+from oid4vci.models.supported_cred import SupportedCredential
+from oid4vci.public_routes import PopResult
+
+from ..cred_processor import CredProcessor
+
+
+class TestCredentialProcessor:
+    """Tests for CredentialProcessor."""
+
+    @pytest.mark.asyncio
+    async def test_issue_credential(
+        self,
+        body: any,
+        supported: SupportedCredential,
+        ex_record: OID4VCIExchangeRecord,
+        pop: PopResult,
+        context: AdminRequestContext,
+    ):
+        """Test issue_credential method."""
+
+        cred_processor = CredProcessor()
+
+        jws = cred_processor.issue_cred(body, supported, ex_record, pop, context)
+
+        assert jws

jwt_vc_json/jwt_vc_json/v1_0/tests/test_init.py

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+import pytest
+
+from ..cred_processor import CredProcessor
+
+
+@pytest.mark.asyncio
+async def test__init__():
+    """Test __init."""
+
+    cred_processor = CredProcessor()
+
+    assert cred_processor