add support for serialization of EC private keys

2 files changed, 53 insertions, 6 deletions

diff --git a/docs/hazmat/primitives/asymmetric/ec.rst b/docs/hazmat/primitives/asymmetric/ec.rst
index 8b9a584b..cf616a0d 100644
--- a/docs/hazmat/primitives/asymmetric/ec.rst
+++ b/docs/hazmat/primitives/asymmetric/ec.rst
@@ -326,6 +326,45 @@ Key Interfaces
         :returns: An :class:`EllipticCurvePrivateNumbers` instance.
 
 
+.. class:: EllipticCurvePrivateKeyWithSerialization
+
+    .. versionadded:: 0.8
+
+    Extends :class:`EllipticCurvePrivateKey`.
+
+    .. method:: private_numbers()
+
+        Create a :class:`EllipticCurvePrivateNumbers` object.
+
+        :returns: An :class:`EllipticCurvePrivateNumbers` instance.
+
+    .. method:: private_bytes(encoding, format, encryption_algorithm)
+
+        Allows serialization of the key to bytes. Encoding (
+        :attr:`~cryptography.hazmat.primitives.serialization.Encoding.PEM` or
+        :attr:`~cryptography.hazmat.primitives.serialization.Encoding.DER`),
+        format (
+        :attr:`~cryptography.hazmat.primitives.serialization.Format.TraditionalOpenSSL`
+        or
+        :attr:`~cryptography.hazmat.primitives.serialization.Format.PKCS8`) and
+        encryption algorithm (such as
+        :class:`~cryptography.hazmat.primitives.serialization.BestAvailableEncryption`
+        or :class:`~cryptography.hazmat.primitives.serialization.NoEncryption`)
+        are chosen to define the exact serialization.
+
+        :param encoding: A value from the
+            :class:`~cryptography.hazmat.primitives.serialization.Encoding` enum.
+
+        :param format: A value from the
+            :class:`~cryptography.hazmat.primitives.serialization.Format` enum.
+
+        :param encryption_algorithm: An instance of an object conforming to the
+            :class:`~cryptography.hazmat.primitives.serialization.KeySerializationEncryption`
+            interface.
+
+        :return bytes: Serialized key.
+
+
 .. class:: EllipticCurvePublicKey
 
     .. versionadded:: 0.5
diff --git a/docs/hazmat/primitives/asymmetric/serialization.rst b/docs/hazmat/primitives/asymmetric/serialization.rst
index e11b02ab..49a0e36e 100644
--- a/docs/hazmat/primitives/asymmetric/serialization.rst
+++ b/docs/hazmat/primitives/asymmetric/serialization.rst
@@ -290,8 +290,11 @@ Serialization Formats
 
     .. versionadded:: 0.8
 
-    An enumeration for private key formats. Used with
-    :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithSerialization.private_bytes`.
+    An enumeration for private key formats. Used with the ``private_bytes``
+    method available on
+    :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithSerialization`
+    and
+    :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKeyWithSerialization`.
 
     .. attribute:: TraditionalOpenSSL
 
@@ -311,8 +314,11 @@ Serialization Encodings
 
     .. versionadded:: 0.8
 
-    An enumeration for encoding types. Used with
-    :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithSerialization.private_bytes`.
+    An enumeration for encoding types. Used with the ``private_bytes`` method
+    available on
+    :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithSerialization`
+    and
+    :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKeyWithSerialization`.
 
     .. attribute:: PEM
 
@@ -329,8 +335,10 @@ Serialization Encryption Types
 .. class:: KeySerializationEncryption
 
     Objects with this interface are usable as encryption types with methods
-    like
-    :meth:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithSerialization.private_bytes`.
+    like ``private_bytes`` available on
+    :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithSerialization`
+    and
+    :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKeyWithSerialization`.
     All other classes in this section represent the available choices for
     encryption and have this interface. They are used with
     :class:`~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKeyWithSerialization.private_bytes`.