add OID information about all supported extensions
diff --git a/docs/x509.rst b/docs/x509.rst
index d231329..96255a2 100644
--- a/docs/x509.rst
+++ b/docs/x509.rst
@@ -1198,6 +1198,40 @@
Corresponds to the dotted string ``"2.5.29.15"``. The identifier for the
:class:`KeyUsage` extension type.
+.. data:: OID_SUBJECT_ALTERNATIVE_NAME
+
+ Corresponds to the dotted string ``"2.5.29.17"``. The identifier for the
+ :class:`SubjectAlternativeName` extension type.
+
+.. data:: OID_SUBJECT_KEY_IDENTIFIER
+
+ Corresponds to the dotted string ``"2.5.29.14"``. The identifier for the
+ :class:`SubjectKeyIdentifier` extension type.
+
+.. data:: OID_CRL_DISTRIBUTION_POINTS
+
+ Corresponds to the dotted string ``"2.5.29.31"``. The identifier for the
+ :class:`CRLDistributionPoints` extension type.
+
+.. data:: OID_CERTIFICATE_POLICIES
+
+ Corresponds to the dotted string ``"2.5.29.32"``. The identifier for the
+ :class:`CertificatePolicies` extension type.
+
+.. data:: OID_AUTHORITY_KEY_IDENTIFIER
+
+ Corresponds to the dotted string ``"2.5.29.35"``. The identifier for the
+ :class:`AuthorityKeyIdentifier` extension type.
+
+.. data:: OID_EXTENDED_KEY_USAGE
+
+ Corresponds to the dotted string ``"2.5.29.37"``. The identifier for the
+ :class:`ExtendedKeyUsage` extension type.
+
+.. data:: OID_AUTHORITY_INFORMATION_ACCESS
+
+ Corresponds to the dotted string ``"1.3.6.1.5.5.7.1.1"``. The identifier
+ for the :class:`AuthorityInformationAccess` extension type.
Exceptions
~~~~~~~~~~