From 32c51a3fe2f52eb797cdfcd300757dbf7e191f11 Mon Sep 17 00:00:00 2001
From: Donald Stufft <donald@stufft.io>
Date: Sat, 10 Aug 2013 18:29:02 -0400
Subject: Small note about the purpose

---
 cryptography/primitives/block/ciphers.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cryptography/primitives/block/ciphers.py b/cryptography/primitives/block/ciphers.py
index 26f9a8e5..17e7765a 100644
--- a/cryptography/primitives/block/ciphers.py
+++ b/cryptography/primitives/block/ciphers.py
@@ -20,6 +20,7 @@ class AES(object):
         super(AES, self).__init__()
         self.key = key
 
+        # Verify that the key size matches the expected key size
         if self.key_size not in self.key_sizes:
             raise ValueError("Invalid key size (%s) for %s".format(
                 self.key_size, self.name
-- 
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