resolve conflicts
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b7e64586f8
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@ -440,6 +440,7 @@ class DID(models.Model):
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related_name='dids',
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null=True,
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)
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# JSON-serialized DID document
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didweb_document = models.TextField()
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def get_key_material(self, password):
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@ -589,6 +590,7 @@ class VerificableCredential(models.Model):
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on_delete=models.CASCADE,
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related_name='vcredentials',
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)
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revocationBitmapIndex = models.AutoField()
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def get_data(self, password):
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if not self.data:
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@ -1,6 +1,10 @@
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import base64
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import json
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import uuid
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import logging
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import zlib
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import pyroaring
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from django.conf import settings
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from django.core.cache import cache
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from django.urls import reverse_lazy
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@ -12,7 +16,7 @@ from django.shortcuts import get_object_or_404, redirect
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from django.contrib.auth.mixins import LoginRequiredMixin
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from django.http import HttpResponseRedirect, HttpResponse, Http404
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from idhub.models import DID
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from idhub.models import DID, VerificableCredential
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from idhub.email.views import NotifyActivateUserByEmail
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from trustchain_idhub import settings
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@ -99,9 +103,29 @@ class PasswordResetView(auth_views.PasswordResetView):
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def serve_did(request, did_id):
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id_did = f'did:web:{settings.DOMAIN}:did-registry:{did_id}'
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import urllib.parse
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domain = urllib.parse.urlencode({"domain": settings.DOMAIN})[7:]
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id_did = f'did:web:{domain}:did-registry:{did_id}'
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did = get_object_or_404(DID, did=id_did)
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document = did.didweb_document
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# Deserialize the base DID from JSON storage
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document = json.loads(did.didweb_document)
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# Has this DID issued any Verifiable Credentials? If so, we need to add a Revocation List "service"
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# entry to the DID document.
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revoked_credentials = did.vcredentials.filter(status=VerificableCredential.Status.REVOKED)
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revoked_credential_indexes = []
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for credential in revoked_credentials:
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revoked_credential_indexes.append(credential.revocationBitmapIndex)
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# TODO: Conditionally add "service" to DID document only if the DID has issued any VC
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revocation_bitmap = pyroaring.BitMap(revoked_credential_indexes)
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encoded_revocation_bitmap = base64.b64encode(zlib.compress(revocation_bitmap.serialize()))
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revocation_service = [{ # This is an object within a list.
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"id": f"{id_did}#revocation",
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"type": "RevocationBitmap2022",
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"serviceEndpoint": f"data:application/octet-stream;base64,{encoded_revocation_bitmap}"
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}]
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document["service"] = revocation_service
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# Serialize the DID + Revocation list in preparation for sending
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document = json.dumps(document)
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retval = HttpResponse(document)
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retval.headers["Content-Type"] = "application/json"
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return retval
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@ -30,3 +30,4 @@ ujson==5.9.0
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openpyxl==3.1.2
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jsonpath_ng==1.6.1
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./didkit-0.3.2-cp311-cp311-manylinux_2_34_x86_64.whl
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pyroaring==0.4.5
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@ -1,11 +1,16 @@
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import asyncio
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import base64
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import datetime
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import zlib
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from ast import literal_eval
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import didkit
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import json
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import urllib
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import jinja2
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from django.template.backends.django import Template
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from django.template.loader import get_template
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from pyroaring import BitMap
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from trustchain_idhub import settings
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@ -18,9 +23,12 @@ def keydid_from_controller_key(key):
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return didkit.key_to_did("key", key)
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async def resolve_keydid(keydid):
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def resolve_did(keydid):
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async def inner():
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return await didkit.resolve_did(keydid, "{}")
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return asyncio.run(inner())
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def webdid_from_controller_key(key):
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"""
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@ -29,7 +37,7 @@ def webdid_from_controller_key(key):
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"""
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keydid = keydid_from_controller_key(key) # "did:key:<...>"
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pubkeyid = keydid.rsplit(":")[-1] # <...>
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document = json.loads(asyncio.run(resolve_keydid(keydid))) # Documento DID en terminos "key"
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document = json.loads(resolve_did(keydid)) # Documento DID en terminos "key"
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domain = urllib.parse.urlencode({"domain": settings.DOMAIN})[7:]
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webdid_url = f"did:web:{domain}:did-registry:{pubkeyid}" # nueva URL: "did:web:idhub.pangea.org:<...>"
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webdid_url_owner = webdid_url + "#owner"
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@ -99,9 +107,37 @@ def verify_credential(vc):
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If it is false, the VC is invalid and the second argument contains a JSON object with further information.
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"""
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async def inner():
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return await didkit.verify_credential(vc, '{"proofFormat": "ldp"}')
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str_res = await didkit.verify_credential(vc, '{"proofFormat": "ldp"}')
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res = literal_eval(str_res)
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ok = res["warnings"] == [] and res["errors"] == []
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return ok, str_res
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return asyncio.run(inner())
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valid, reason = asyncio.run(inner())
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if not valid:
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return valid, reason
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# Credential passes basic signature verification. Now check it against its schema.
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# TODO: check agasint schema
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pass
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# Credential verifies against its schema. Now check revocation status.
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vc = json.loads(vc)
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if "credentialStatus" in vc:
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revocation_index = int(vc["credentialStatus"]["revocationBitmapIndex"]) # NOTE: THIS FIELD SHOULD BE SERIALIZED AS AN INTEGER, BUT IOTA DOCUMENTAITON SERIALIZES IT AS A STRING. DEFENSIVE CAST ADDED JUST IN CASE.
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vc_issuer = vc["issuer"]["id"] # This is a DID
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if vc_issuer[:7] == "did:web": # Only DID:WEB can revoke
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issuer_did_document = json.loads(resolve_did(vc_issuer)) # TODO: implement a caching layer so we don't have to fetch the DID (and thus the revocation list) every time a VC is validated.
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issuer_revocation_list = issuer_did_document["service"][0]
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assert issuer_revocation_list["type"] == "RevocationBitmap2022"
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revocation_bitmap = BitMap.deserialize(
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zlib.decompress(
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base64.b64decode(
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issuer_revocation_list["serviceEndpoint"].rsplit(",")[1]
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)
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)
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)
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if revocation_index in revocation_bitmap:
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return False, "Credential has been revoked by the issuer"
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# Fallthrough means all is good.
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return True, "Credential passes all checks"
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def issue_verifiable_presentation(vp_template: Template, vc_list: list[str], jwk_holder: str, holder_did: str) -> str:
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