add missing sign/verify/generate docs for the RSA interfaces
diff --git a/docs/hazmat/primitives/interfaces.rst b/docs/hazmat/primitives/interfaces.rst
index cdb925e..d39898e 100644
--- a/docs/hazmat/primitives/interfaces.rst
+++ b/docs/hazmat/primitives/interfaces.rst
@@ -112,6 +112,43 @@
An `RSA`_ private key.
+ .. classmethod:: generate(public_exponent, key_size, backend)
+
+ Generate a new ``RSAPrivateKey`` instance using ``backend``.
+
+ :param int public_exponent: The public exponent of the new key.
+ Usually one of the small Fermat primes 3, 5, 17, 257, 65537. If in
+ doubt you should `use 65537`_.
+ :param int key_size: The length of the modulus in bits. For keys
+ generated in 2014 it is strongly recommended to be
+ `at least 2048`_ (See page 41). It must not be less than 512.
+ Some backends may have additional limitations.
+ :param backend: A
+ :class:`~cryptography.hazmat.backends.interfaces.RSABackend`
+ provider.
+ :return: A new instance of ``RSAPrivateKey``.
+
+ .. method:: signer(padding, algorithm, backend)
+
+ .. versionadded:: 0.3
+
+ Sign data which can be verified later by others using the public key.
+
+ :param padding: An instance of a
+ :class:`~cryptography.hazmat.primitives.interfaces.AsymmetricPadding`
+ provider.
+
+ :param algorithm: An instance of a
+ :class:`~cryptography.hazmat.primitives.interfaces.HashAlgorithm`
+ provider.
+
+ :param backend: A
+ :class:`~cryptography.hazmat.backends.interfaces.RSABackend`
+ provider.
+
+ :returns:
+ :class:`~cryptography.hazmat.primitives.interfaces.AsymmetricSignatureContext`
+
.. method:: public_key()
:return: :class:`~cryptography.hazmat.primitives.interfaces.RSAPublicKey`
@@ -200,6 +237,31 @@
An `RSA`_ public key.
+ .. method:: verifier(signature, padding, algorithm, backend)
+
+ .. versionadded:: 0.3
+
+ Verify data was signed by the private key associated with this public
+ key.
+
+ :param bytes signature: The signature to verify.
+
+ :param padding: An instance of a
+ :class:`~cryptography.hazmat.primitives.interfaces.AsymmetricPadding`
+ provider.
+
+ :param algorithm: An instance of a
+ :class:`~cryptography.hazmat.primitives.interfaces.HashAlgorithm`
+ provider.
+
+ :param backend: A
+ :class:`~cryptography.hazmat.backends.interfaces.RSABackend`
+ provider.
+
+ :returns:
+ :class:`~cryptography.hazmat.primitives.interfaces.AsymmetricVerificationContext`
+
+
.. attribute:: modulus
:type: int
@@ -470,3 +532,5 @@
.. _`RSA`: https://en.wikipedia.org/wiki/RSA_(cryptosystem)
.. _`Chinese remainder theorem`: https://en.wikipedia.org/wiki/Chinese_remainder_theorem
.. _`DSA`: https://en.wikipedia.org/wiki/Digital_Signature_Algorithm
+.. _`use 65537`: http://www.daemonology.net/blog/2009-06-11-cryptographic-right-answers.html
+.. _`at least 2048`: http://www.ecrypt.eu.org/documents/D.SPA.20.pdf