Update documentation

CHANGELOG.rst

@@ -18,6 +18,10 @@ Changelog
 * Added support for obtaining X.509 certificate signing request signature
   algorithm parameters (including PSS) via
   :meth:`~cryptography.x509.CertificateSigningRequest.signature_algorithm_parameters`.
+* Added `mgf` property to
+  :class:`~cryptography.hazmat.primitives.asymmetric.padding.PSS`.
+* Added `algorithm` and `mgf` properties to
+  :class:`~cryptography.hazmat.primitives.asymmetric.padding.OAEP`.
 
 .. _v41-0-3:
 

docs/hazmat/primitives/asymmetric/rsa.rst

@@ -317,6 +317,14 @@ Padding
         Pass this attribute to ``salt_length`` to automatically determine the
         salt length when verifying. Raises ``ValueError`` if used when signing.
 
+    .. attribute:: mgf
+
+        :type: :class:`~cryptography.hazmat.primitives.asymmetric.padding.MGF`
+
+        .. versionadded:: 42.0.0
+
+        The padding's mask generation function (MGF).
+
 .. class:: OAEP(mgf, algorithm, label)
 
     .. versionadded:: 0.4
@@ -335,6 +343,22 @@ Padding
     :param bytes label: A label to apply. This is a rarely used field and
         should typically be set to ``None`` or ``b""``, which are equivalent.
 
+    .. attribute:: algorithm
+
+        :type: :class:`~cryptography.hazmat.primitives.hashes.HashAlgorithm`
+
+        .. versionadded:: 42.0.0
+
+        The padding's hash algorithm.
+
+    .. attribute:: mgf
+
+        :type: :class:`~cryptography.hazmat.primitives.asymmetric.padding.MGF`
+
+        .. versionadded:: 42.0.0
+
+        The padding's mask generation function (MGF).
+
 .. class:: PKCS1v15()
 
     .. versionadded:: 0.3