from pyderasn import ObjectIdentifier
+id_at_commonName = ObjectIdentifier("2.5.4.3")
+id_at_countryName = ObjectIdentifier("2.5.4.6")
+id_at_localityName = ObjectIdentifier("2.5.4.7")
+id_at_stateOrProvinceName = ObjectIdentifier("2.5.4.8")
+id_at_organizationName = ObjectIdentifier("2.5.4.10")
+
id_pkcs7 = ObjectIdentifier("1.2.840.113549.1.7")
id_data = id_pkcs7 + (1,)
id_signedData = id_pkcs7 + (2,)