Add changelog entry and documentation.

pyca · Oct 19, 2021 · 91d7e66 · 91d7e66
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diff --git a/CHANGELOG.rst b/CHANGELOG.rst
@@ -13,6 +13,8 @@ Changelog
   :func:`~cryptography.hazmat.primitives.serialization.pkcs12.load_pkcs12`,
   which will return an object of type
   :class:`~cryptography.hazmat.primitives.serialization.pkcs12.PKCS12KeyAndCertificates`.
+* Extension values can now be serialized to a DER byte string by calling
+  :func:`~cryptography.x509.ExtensionType.to_der_string`.
 
 .. _v35-0-0:
 

diff --git a/docs/x509/reference.rst b/docs/x509/reference.rst
@@ -1589,6 +1589,14 @@ X.509 Extensions
 
         Returns the OID associated with the given extension type.
 
+    .. method:: to_der_string
+
+        .. versionadded:: 36.0
+
+        :return bytes:
+
+            A bytes string representing the extension's DER encoded value.
+
 .. class:: KeyUsage(digital_signature, content_commitment, key_encipherment, data_encipherment, key_agreement, key_cert_sign, crl_sign, encipher_only, decipher_only)
 
     .. versionadded:: 0.9