Add DSA verification docs
diff --git a/docs/hazmat/primitives/interfaces.rst b/docs/hazmat/primitives/interfaces.rst
index c76582c..c1d01f7 100644
--- a/docs/hazmat/primitives/interfaces.rst
+++ b/docs/hazmat/primitives/interfaces.rst
@@ -412,17 +412,37 @@
The bit length of the modulus.
+ .. attribute:: y
+
+ :type: int
+
+ The public key.
+
.. method:: parameters()
:return: :class:`~cryptography.hazmat.primitives.interfaces.DSAParameters`
The DSAParameters object associated with this public key.
- .. attribute:: y
+ .. method:: verifier(signature, algorithm, backend)
- :type: int
+ .. versionadded:: 0.4
- The public key.
+ Verify data was signed by the private key associated with this public
+ key.
+
+ :param bytes signature: The signature to verify.
+
+ :param algorithm: An instance of a
+ :class:`~cryptography.hazmat.primitives.interfaces.HashAlgorithm`
+ provider.
+
+ :param backend: A
+ :class:`~cryptography.hazmat.backends.interfaces.DSABackend`
+ provider.
+
+ :returns:
+ :class:`~cryptography.hazmat.primitives.interfaces.AsymmetricVerificationContext`
.. class:: AsymmetricSignatureContext