def sign(credential, pvk, method="ethr"):
"""
@method str
default is is ethr
tz (tz2)
@credential is dict
return is str
Both curve secp256k1 and "alg" :"ES256K-R"
"""
if not method:
method = 'ethr'
key = ethereum_to_jwk256kr(pvk)
did = didkit.keyToDID(method, key)
vm = didkit.keyToVerificationMethod(method, key)
credential["issuer"] = did
credential["issuanceDate"] = datetime.now().strftime('%Y-%m-%dT%H:%M:%SZ')
didkit_options = {
"proofPurpose": "assertionMethod",
"verificationMethod": vm
}
return didkit.issueCredential(
#credential.__str__().replace("'", '"'),
json.dumps(credential, ensure_ascii=False),
didkit_options.__str__().replace("'", '"'),
key)
def setUp(self):
tests.key = "{\"kty\":\"OKP\",\"crv\":\"Ed25519\",\"x\":\"PBcY2yJ4h_cLUnQNcYhplu9KQQBNpGxP4sYcMPdlu6I\",\"d\":\"n5WUFIghmRYZi0rEYo2lz-Zg2B9B1KW4MYfJXwOXfyI\"}"
tests.did = didkit.keyToDID("key", tests.key)
tests.verificationMethod = didkit.keyToVerificationMethod(
"key", tests.key)
tests.presentation = {
"@context": ["https://www.w3.org/2018/credentials/v1"],
"id": "http://example.org/presentations/3731",
"type": ["VerifiablePresentation"],
"holder": tests.did,
"verifiableCredential": {
"@context": "https://www.w3.org/2018/credentials/v1",
"id": "http://example.org/credentials/3731",
"type": ["VerifiableCredential"],
"issuer": "did:example:30e07a529f32d234f6181736bd3",
"issuanceDate": "2020-08-19T21:41:50Z",
"credentialSubject": {
"id": "did:example:d23dd687a7dc6787646f2eb98d0",
},
},
}
tests.verificationPurpose = {
"proofPurpose": "authentication",
"verificationMethod": tests.verificationMethod,
}
def setUp(self):
tests.key = "{\"kty\":\"OKP\",\"crv\":\"Ed25519\",\"x\":\"PBcY2yJ4h_cLUnQNcYhplu9KQQBNpGxP4sYcMPdlu6I\",\"d\":\"n5WUFIghmRYZi0rEYo2lz-Zg2B9B1KW4MYfJXwOXfyI\"}"
tests.did = didkit.keyToDID("key", tests.key)
tests.verificationMethod = didkit.keyToVerificationMethod(
"key", tests.key)
tests.verificationPurpose = {
"proofPurpose": "authentication",
"verificationMethod": tests.verificationMethod,
"challenge": uuid.uuid4().__str__()
}
def issueCredential(request):
session_id = request.args.get("session_id")
session_data = stripe.checkout.Session.retrieve(session_id)
with open('key.jwk', "r") as f:
key = f.readline()
f.close()
did_key = request.form.get('subject_id', didkit.keyToDID("key", key))
verification_method = didkit.keyToVerificationMethod("key", key)
issuance_date = datetime.utcnow().replace(microsecond=0)
expiration_date = issuance_date + timedelta(weeks=4)
credential = {
"id":
"urn:uuid:" + uuid.uuid4().__str__(),
"@context": [
"https://www.w3.org/2018/credentials/v1",
"https://www.w3.org/2018/credentials/examples/v1",
],
"type": ["VerifiableCredential"],
"issuer":
did_key,
"issuanceDate":
issuance_date.isoformat() + "Z",
"expirationDate":
expiration_date.isoformat() + "Z",
"credentialSubject": {
"@context": [{
"email": "https://schema.org/Text"
}],
"id": "urn:uuid:" + uuid.uuid4().__str__(),
"email": session_data["customer_details"]["email"]
},
}
didkit_options = {
"proofPurpose": "assertionMethod",
"verificationMethod": verification_method,
}
credential = didkit.issueCredential(
credential.__str__().replace("'", '"'),
didkit_options.__str__().replace("'", '"'), key)
return json.loads(credential)
def testKeyToVerificationMethod(self):
self.assertEqual(
didkit.keyToVerificationMethod("key", tests.key),
"did:key:z6MkiVpwA241guqtKWAkohHpcAry7S94QQb6ukW3GcCsugbK#z6MkiVpwA241guqtKWAkohHpcAry7S94QQb6ukW3GcCsugbK"
)
method = "tz"
pvk = "0x7f1116bdb705f3e51a299a1fe04b619e0e2516258ef187946076b04151ece8a5"
key = ethereum_to_jwk256kr(pvk)
did = didkit.keyToDID(method, key)
credential = json.load(
open('/home/thierry/Talao/verifiable_credentials/experience.jsonld',
'r'))
credential['credentialSubject']["id"] = "2020-08-19T21:41:50Z"
credential['id'] = "123123123131321:lkjh:mh"
credential["issuer"] = did
credential["issuanceDate"] = "2020-08-19T21:41:50Z"
credential = sign(credential, pvk, method=method)
print(json.dumps(json.loads(credential), indent=4))
key = ethereum_to_jwk256kr(pvk)
verifmethod = didkit.keyToVerificationMethod(method, key)
didkit_options = {
"proofPurpose": "assertionMethod",
"verificationMethod": verifmethod
}
print(
didkit.verifyCredential(credential,
didkit_options.__str__().replace("'", '"')))
print('jwk =', key)
d = json.loads(key)["d"]
private_key = "0x" + base64.urlsafe_b64decode(d + '=' * (4 - len(d) % 4)).hex()
print("private key = ", private_key)
priv_key_bytes = decode_hex(private_key)
priv_key = keys.PrivateKey(priv_key_bytes)
pub_key = priv_key.public_key
print("public key ", pub_key.to_hex())
print("address = ", pub_key.to_checksum_address())
did = "did:key:" + pub_key.to_checksum_address()[2:]
did = didkit.keyToDID("ethr", key)
print("did = ", did)
verifmethod = didkit.keyToVerificationMethod("ethr", key)
print("verifimethod = ", verifmethod)
credential = {
"@context": "https://www.w3.org/2018/credentials/v1",
"type": ["VerifiableCredential"],
"issuer": did,
"issuanceDate": "2020-08-19T21:41:50Z",
"credentialSubject": {
"id": "did:example:d23dd687a7dc6787646f2eb98d0",
}
}
didkit_options = {
"proofPurpose": "assertionMethod",
"verificationMethod": verifmethod