add oid attribute to all extension types

1 files changed, 25 insertions, 1 deletions

diff --git a/src/cryptography/x509.py b/src/cryptography/x509.py
index 0ddff728..c8380b1a 100644
--- a/src/cryptography/x509.py
+++ b/src/cryptography/x509.py
@@ -314,6 +314,8 @@ class Extension(object):
 
 
 class ExtendedKeyUsage(object):
+    oid = OID_EXTENDED_KEY_USAGE
+
     def __init__(self, usages):
         if not all(isinstance(x, ObjectIdentifier) for x in usages):
             raise TypeError(
@@ -342,10 +344,12 @@ class ExtendedKeyUsage(object):
 
 
 class OCSPNoCheck(object):
-    pass
+    oid = OID_OCSP_NO_CHECK
 
 
 class BasicConstraints(object):
+    oid = OID_BASIC_CONSTRAINTS
+
     def __init__(self, ca, path_length):
         if not isinstance(ca, bool):
             raise TypeError("ca must be a boolean value")
@@ -382,6 +386,8 @@ class BasicConstraints(object):
 
 
 class KeyUsage(object):
+    oid = OID_KEY_USAGE
+
     def __init__(self, digital_signature, content_commitment, key_encipherment,
                  data_encipherment, key_agreement, key_cert_sign, crl_sign,
                  encipher_only, decipher_only):
@@ -465,6 +471,8 @@ class KeyUsage(object):
 
 
 class AuthorityInformationAccess(object):
+    oid = OID_AUTHORITY_INFORMATION_ACCESS
+
     def __init__(self, descriptions):
         if not all(isinstance(x, AccessDescription) for x in descriptions):
             raise TypeError(
@@ -529,6 +537,8 @@ class AccessDescription(object):
 
 
 class CertificatePolicies(object):
+    oid = OID_CERTIFICATE_POLICIES
+
     def __init__(self, policies):
         if not all(isinstance(x, PolicyInformation) for x in policies):
             raise TypeError(
@@ -666,6 +676,8 @@ class NoticeReference(object):
 
 
 class SubjectKeyIdentifier(object):
+    oid = OID_SUBJECT_KEY_IDENTIFIER
+
     def __init__(self, digest):
         self._digest = digest
 
@@ -687,6 +699,8 @@ class SubjectKeyIdentifier(object):
 
 
 class NameConstraints(object):
+    oid = OID_NAME_CONSTRAINTS
+
     def __init__(self, permitted_subtrees, excluded_subtrees):
         if permitted_subtrees is not None:
             if not all(
@@ -751,6 +765,8 @@ class NameConstraints(object):
 
 
 class CRLDistributionPoints(object):
+    oid = OID_CRL_DISTRIBUTION_POINTS
+
     def __init__(self, distribution_points):
         if not all(
             isinstance(x, DistributionPoint) for x in distribution_points
@@ -871,6 +887,8 @@ class ReasonFlags(Enum):
 
 
 class InhibitAnyPolicy(object):
+    oid = OID_INHIBIT_ANY_POLICY
+
     def __init__(self, skip_certs):
         if not isinstance(skip_certs, six.integer_types):
             raise TypeError("skip_certs must be an integer")
@@ -1161,6 +1179,8 @@ class GeneralNames(object):
 
 
 class SubjectAlternativeName(object):
+    oid = OID_SUBJECT_ALTERNATIVE_NAME
+
     def __init__(self, general_names):
         self._general_names = GeneralNames(general_names)
 
@@ -1187,6 +1207,8 @@ class SubjectAlternativeName(object):
 
 
 class IssuerAlternativeName(object):
+    oid = OID_ISSUER_ALTERNATIVE_NAME
+
     def __init__(self, general_names):
         self._general_names = GeneralNames(general_names)
 
@@ -1213,6 +1235,8 @@ class IssuerAlternativeName(object):
 
 
 class AuthorityKeyIdentifier(object):
+    oid = OID_AUTHORITY_KEY_IDENTIFIER
+
     def __init__(self, key_identifier, authority_cert_issuer,
                  authority_cert_serial_number):
         if authority_cert_issuer or authority_cert_serial_number: