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+.. hazmat::
+
+DSA
+===
+
+.. currentmodule:: cryptography.hazmat.primitives.asymmetric.dsa
+
+`DSA`_ is a `public-key`_ algorithm for signing messages.
+
+.. class:: DSAParameters(modulus, subgroup_order, generator)
+
+    .. versionadded:: 0.4
+
+    DSA Parameters are required for generating a DSA private key.
+
+    This class conforms to the
+    :class:`~cryptography.hazmat.primitives.interfaces.DSAParameters`
+    interface.
+
+    :raises TypeError: This is raised when the arguments are not all integers.
+
+    :raises ValueError: This is raised when the values of ``modulus``,
+                        ``subgroup_order``, or ``generator`` do
+                        not match the bounds specified in `FIPS 186-4`_.
+
+
+.. class:: DSAPrivateKey(modulus, subgroup_order, generator, x, y)
+
+    .. versionadded:: 0.4
+
+    A DSA private key is required for signing messages.
+
+    This class conforms to the
+    :class:`~cryptography.hazmat.primitives.interfaces.DSAPrivateKey`
+    interface.
+
+    :raises TypeError: This is raised when the arguments are not all integers.
+
+    :raises ValueError: This is raised when the values of ``modulus``,
+                        ``subgroup_order``, or ``generator`` do
+                        not match the bounds specified in `FIPS 186-4`_.
+
+
+.. class:: DSAPublicKey(modulus, subgroup_order, generator, y)
+
+    .. versionadded:: 0.4
+
+    A DSA public key is required for verifying messages.
+
+    Normally you do not need to directly construct public keys because you'll
+    be loading them from a file, generating them automatically or receiving
+    them from a 3rd party.
+
+    This class conforms to the
+    :class:`~cryptography.hazmat.primitives.interfaces.DSAPublicKey`
+    interface.
+
+    :raises TypeError: This is raised when the arguments are not all integers.
+
+    :raises ValueError: This is raised when the values of ``modulus``,
+                        ``subgroup_order``,``generator``, or ``y`` 
+                        do not match the bounds specified in `FIPS 186-4`_.
+
+
+.. _`DSA`: https://en.wikipedia.org/wiki/Digital_Signature_Algorithm 
+.. _`public-key`: https://en.wikipedia.org/wiki/Public-key_cryptography
+.. _`FIPS 186-4`: http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.186-4.pdf 
+