switch to timezone.utc for compatibility;

Author: ljoy913

pymdoccbor/mso/issuer.py

@@ -4,6 +4,8 @@
 import secrets
 import uuid
 
+from datetime import timezone
+
 from pycose.headers import Algorithm, KID
 from pycose.keys import CoseKey, EC2Key
 from pycose.messages import Sign1Message
@@ -137,7 +139,7 @@ def sign(
         :return: the signed mso
         :rtype: Sign1Message
         """
-        utcnow = datetime.datetime.now(datetime.UTC)
+        utcnow = datetime.datetime.now(timezone.utc)
         if settings.PYMDOC_EXP_DELTA_HOURS:
             exp = utcnow + datetime.timedelta(
                 hours=settings.PYMDOC_EXP_DELTA_HOURS

pymdoccbor/settings.py

@@ -1,6 +1,8 @@
 import datetime
 import os
 
+from datetime import timezone
+
 COSEKEY_HAZMAT_CRV_MAP = {
     "secp256r1": "P_256",
     "secp384r1": "P_384",
@@ -34,11 +36,11 @@
 X509_ORGANIZATION_NAME      = os.getenv('X509_ORGANIZATION_NAME', u"My Company")
 X509_COMMON_NAME            = os.getenv('X509_COMMON_NAME', u"mysite.com")
 
-X509_NOT_VALID_BEFORE       = os.getenv('X509_NOT_VALID_BEFORE', datetime.datetime.now(datetime.UTC))
+X509_NOT_VALID_BEFORE       = os.getenv('X509_NOT_VALID_BEFORE', datetime.datetime.now(timezone.utc))
 X509_NOT_VALID_AFTER_DAYS   = os.getenv('X509_NOT_VALID_AFTER_DAYS', 10)
 X509_NOT_VALID_AFTER        = os.getenv(
     'X509_NOT_VALID_AFTER', 
-    datetime.datetime.now(datetime.UTC) + datetime.timedelta(
+    datetime.datetime.now(timezone.utc) + datetime.timedelta(
         days=X509_NOT_VALID_AFTER_DAYS
     )
 )