From 5a47adb56bfe80c34ed5b04a4824e517a3cde16d Mon Sep 17 00:00:00 2001
From: Devendra
Date: Tue, 26 Feb 2013 01:02:44 +0530
Subject: fixiing encryption to interact with php app

---
 PubnubBase.py            |  4 +++-
 PubnubCrypto.py          | 13 +++++++------
 python-tornado/Pubnub.py |  1 +
 3 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/PubnubBase.py b/PubnubBase.py
index 074b891..07dd27f 100644
--- a/PubnubBase.py
+++ b/PubnubBase.py
@@ -16,6 +16,7 @@ import time
 import hashlib
 import urllib2
 import uuid 
+from PubnubCrypto import PubnubCrypto
 
 class PubnubBase(object):
     def __init__(
@@ -95,7 +96,7 @@ class PubnubBase(object):
                     out.append(outdict)
                 message = json.dumps(out[0])
             else:
-                message = json.dumps(pc.encrypt(self.cipher_key, message).replace('\n',''))
+                message = json.dumps(pc.encrypt(self.cipher_key, json.dumps(message)).replace('\n',''))
         else :
             message = json.dumps(message)
 
@@ -103,6 +104,7 @@ class PubnubBase(object):
 
     def decrypt(self, message):
         if self.cipher_key:
+            pc = PubnubCrypto()
             if type( message ) == type(list()):
                 for item in message:
                     encryptItem = pc.decrypt(self.cipher_key, item )
diff --git a/PubnubCrypto.py b/PubnubCrypto.py
index 744f2d3..b7a57a1 100644
--- a/PubnubCrypto.py
+++ b/PubnubCrypto.py
@@ -38,7 +38,8 @@ class PubnubCrypto() :
         #* @return msg with padding.
         #**
         """
-        return msg + ((block_size - len(msg) % block_size) * chr(block_size - len(msg) % block_size))
+        padding = block_size - (len(msg) % block_size)
+        return msg + chr(padding)*padding
        
     def depad( self, msg ):
         """
@@ -60,7 +61,7 @@ class PubnubCrypto() :
         #* @return key in MD5 format
         #**
         """
-        return MD5.new(key).digest()
+        return hashlib.sha256(key).hexdigest()
 
     def encrypt( self, key, msg ):
         """
@@ -73,9 +74,9 @@ class PubnubCrypto() :
         """
         secret = self.getSecret(key)
         Initial16bytes='0123456789012345'
-        cipher = AES.new(secret,AES.MODE_CBC,Initial16bytes)
-        return encodestring(cipher.encrypt(self.pad(msg)))
-    
+        cipher = AES.new(secret[0:32],AES.MODE_CBC,Initial16bytes)
+        enc = encodestring(cipher.encrypt(self.pad(msg)))
+        return enc
     def decrypt( self, key, msg ):
         """
         #**
@@ -87,6 +88,6 @@ class PubnubCrypto() :
         """
         secret = self.getSecret(key)
         Initial16bytes='0123456789012345'
-        cipher = AES.new(secret,AES.MODE_CBC,Initial16bytes)
+        cipher = AES.new(secret[0:32],AES.MODE_CBC,Initial16bytes)
         return self.depad((cipher.decrypt(decodestring(msg))))
     
diff --git a/python-tornado/Pubnub.py b/python-tornado/Pubnub.py
index 880e396..eba2a0f 100644
--- a/python-tornado/Pubnub.py
+++ b/python-tornado/Pubnub.py
@@ -51,6 +51,7 @@ class Pubnub(PubnubCoreAsync):
             publish_key=publish_key,
             subscribe_key=subscribe_key,
             secret_key=secret_key,
+            cipher_key=cipher_key,
             ssl_on=ssl_on,
             origin=origin,
         )        
-- 
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