docs, tests, general huge improvements to RSA decryption
diff --git a/docs/hazmat/backends/interfaces.rst b/docs/hazmat/backends/interfaces.rst
index 394d060..71cd456 100644
--- a/docs/hazmat/backends/interfaces.rst
+++ b/docs/hazmat/backends/interfaces.rst
@@ -263,6 +263,18 @@
:returns: ``True`` if the specified ``algorithm`` is supported by this
backend, otherwise ``False``.
+ .. method:: decrypt_rsa(private_key, ciphertext, padding)
+
+ :param private_key: An instance of an
+ :class:`~cryptography.hazmat.primitives.interfaces.RSAPrivateKey`
+ provider.
+
+ :param bytes ciphertext: The ciphertext to decrypt.
+
+ :param padding: An instance of an
+ :class:`~cryptography.hazmat.primitives.interfaces.AsymmetricPadding`
+ provider.
+
.. class:: OpenSSLSerializationBackend