Added verify_presentation bindings and use them in verification_portal backend
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@ -2,6 +2,8 @@ import json
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from django.core.mail import send_mail
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from django.http import HttpResponse, HttpResponseRedirect
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from utils.idhub_ssikit import verify_presentation
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from .models import VPVerifyRequest
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from django.shortcuts import get_object_or_404
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from more_itertools import flatten, unique_everseen
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@ -9,7 +11,10 @@ from more_itertools import flatten, unique_everseen
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def verify(request):
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assert request.method == "POST"
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# TODO: use request.POST["presentation_submission"]
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# TODO: incorporate request.POST["presentation_submission"] as schema definition
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(presentation_valid, _) = verify_presentation(request.POST["vp_token"])
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if not presentation_valid:
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raise Exception("Failed to verify signature on the given Verifiable Presentation.")
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vp = json.loads(request.POST["vp_token"])
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nonce = vp["nonce"]
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# "vr" = verification_request
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@ -72,3 +72,40 @@ def verify_credential(vc, proof_options):
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return didkit.verify_credential(vc, proof_options)
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return asyncio.run(inner())
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def issue_verifiable_presentation(vc_list: list[str], jwk_holder: str, holder_did: str) -> str:
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async def inner():
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unsigned_vp = unsigned_vp_template.render(data)
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signed_vp = await didkit.issue_presentation(
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unsigned_vp,
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'{"proofFormat": "ldp"}',
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jwk_holder
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)
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return signed_vp
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# TODO: convert from Jinja2 -> django-templates
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env = Environment(
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loader=FileSystemLoader("vc_templates"),
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autoescape=select_autoescape()
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)
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unsigned_vp_template = env.get_template("verifiable_presentation.json")
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data = {
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"holder_did": holder_did,
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"verifiable_credential_list": "[" + ",".join(vc_list) + "]"
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}
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return asyncio.run(inner())
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def verify_presentation(vp):
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"""
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Returns a (bool, str) tuple indicating whether the credential is valid.
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If the boolean is true, the credential is valid and the second argument can be ignored.
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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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proof_options = '{"proofFormat": "ldp"}'
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return didkit.verify_presentation(vp, proof_options)
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return asyncio.run(inner())
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