def testIssuesCredentials(self):
credential = didkit.issueCredential(
tests.credential.__str__().replace("'", '"'),
tests.verificationMethod.__str__().replace("'", '"'), tests.key)
verifyResult = json.loads(
didkit.verifyCredential(credential.__str__().replace("'", '"'),
"{\"proofPurpose\":\"assertionMethod\"}"))
self.assertEqual(len(verifyResult["errors"]), 0)
def verify(credential):
"""
credential str
return list
"""
try:
result = didkit.verifyCredential(credential, '{}')
except:
return "Failed : JSON-LD malformed"
if not json.loads(result)['errors']:
return "Signature verified : "
else:
return "Signature rejected : " + result
def sign(credential, pvk, did, rsa=None):
""" sign credential for did:ethr, did:tz, did:web
@method is str
ethr (default method) -> curve secp256k1 and "alg" :"ES256K-R"
tz (tz2) -> curve secp256k1 with "alg" :"ES256K-R"
web -> curve secp256k1 with "alg" :"ES256K" or RSA
@credential is dict
return is str
"""
method = did.split(':')[1]
if method == 'web' and not rsa:
key = ethereum_to_jwk256k(pvk)
vm = did + "#key-1"
elif method == 'web' and rsa:
key = jwk.JWK.from_pem(rsa.encode())
key = key.export_private()
vm = did + "#key-2"
elif method == 'ethr':
key = ethereum_to_jwk256kr(pvk)
vm = did + "#controller"
elif method == 'tz':
key = ethereum_to_jwk256kr(pvk)
vm = did + "#blockchainAccountId"
else:
logging.error('method not supported')
return None
didkit_options = {
"proofPurpose": "assertionMethod",
"verificationMethod": vm
}
signed_credential = didkit.issueCredential(
json.dumps(credential, ensure_ascii=False),
didkit_options.__str__().replace("'", '"'), key)
# verify credential before leaving
if json.loads(didkit.verifyCredential(signed_credential, '{}'))["errors"]:
logging.error('signature failed')
return None
return signed_credential
"type":
"EcdsaSecp256k1Signature2019",
"proofPurpose":
"assertionMethod",
"verificationMethod":
"did:web:talao.co#key-1",
"created":
"2021-05-12T12:10:56.655Z",
"jws":
"eyJiNjQiOmZhbHNlLCJjcml0IjpbImI2NCJdLCJhbGciOiJFUzI1NksifQ..m6HGetBv0-1SLqHrg21SZfqu0JzyNDoROXu3v-IGkNtUpPWRWr_7ejQRzud6wy2De3qGNzydTEKbDp_bmpqAfg"
}
}
"""
didkit_options = {
"proofPurpose": "assertionMethod",
"verificationMethod": "did:web:talao.co#key-1",
}
didkit_credential = didkit.issueCredential(
credential.__str__().replace("'", '"'),
didkit_options.__str__().replace("'", '"'),
json.dumps(key)
)
"""
result = didkit.verifyCredential(json.dumps(signed_credential), '{}')
print(result)
#print(json.dumps(json.loads(didkit_credential), indent=4))
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("'", '"')))