From fb042ad11a98f3a8eb7103d052e4d703687c8739 Mon Sep 17 00:00:00 2001
From: Paul Kehrer <paul.l.kehrer@gmail.com>
Date: Wed, 29 Jan 2014 14:37:09 -0600
Subject: switch to private attributes in pbkdf2hmac

---
 cryptography/hazmat/primitives/kdf/pbkdf2.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/cryptography/hazmat/primitives/kdf/pbkdf2.py b/cryptography/hazmat/primitives/kdf/pbkdf2.py
index c08e7d9a..71b88211 100644
--- a/cryptography/hazmat/primitives/kdf/pbkdf2.py
+++ b/cryptography/hazmat/primitives/kdf/pbkdf2.py
@@ -31,7 +31,7 @@ class PBKDF2HMAC(object):
                     algorithm.name)
             )
         self._used = False
-        self.algorithm = algorithm
+        self._algorithm = algorithm
         self._length = length
         if isinstance(salt, six.text_type):
             raise TypeError(
@@ -39,7 +39,7 @@ class PBKDF2HMAC(object):
                 "material."
             )
         self._salt = salt
-        self.iterations = iterations
+        self._iterations = iterations
         self._backend = backend
 
     def derive(self, key_material):
@@ -53,10 +53,10 @@ class PBKDF2HMAC(object):
                 "material."
             )
         return self._backend.derive_pbkdf2_hmac(
-            self.algorithm,
+            self._algorithm,
             self._length,
             self._salt,
-            self.iterations,
+            self._iterations,
             key_material
         )
 
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