Merge branch 'TR-89.88.56.47.55'

Conflicts:
	.gitignore

1 files changed, 81 insertions, 0 deletions

diff --git a/common/PubnubCrypto.py b/common/PubnubCrypto.py
new file mode 100644
index 0000000..df7cb8d
--- /dev/null
+++ b/common/PubnubCrypto.py
@@ -0,0 +1,81 @@
+from Crypto.Cipher import AES
+from Crypto.Hash import MD5
+from base64 import encodestring, decodestring 
+import hashlib
+import hmac
+
+class PubnubCrypto() :
+    """
+    #**
+    #* PubnubCrypto
+    #*
+    #**
+
+    ## Initiate Class
+    pc = PubnubCrypto
+
+    """
+   
+    def pad( self, msg, block_size=16 ):
+        """
+        #**
+        #* pad
+        #*
+        #* pad the text to be encrypted
+        #* appends a padding character to the end of the String
+        #* until the string has block_size length
+        #* @return msg with padding.
+        #**
+        """
+        padding = block_size - (len(msg) % block_size)
+        return msg + chr(padding)*padding
+       
+    def depad( self, msg ):
+        """
+        #**
+        #* depad
+        #*
+        #* depad the decryptet message"
+        #* @return msg without padding.
+        #**
+        """
+        return msg[0:-ord(msg[-1])]
+
+    def getSecret( self, key ):
+        """
+        #**
+        #* getSecret
+        #*
+        #* hases the key to MD5
+        #* @return key in MD5 format
+        #**
+        """
+        return hashlib.sha256(key).hexdigest()
+
+    def encrypt( self, key, msg ):
+        """
+        #**
+        #* encrypt
+        #*
+        #* encrypts the message
+        #* @return message in encrypted format
+        #**
+        """
+        secret = self.getSecret(key)
+        Initial16bytes='0123456789012345'
+        cipher = AES.new(secret[0:32],AES.MODE_CBC,Initial16bytes)
+        enc = encodestring(cipher.encrypt(self.pad(msg)))
+        return enc
+    def decrypt( self, key, msg ):
+        """
+        #**
+        #* decrypt
+        #*
+        #* decrypts the message
+        #* @return message in decryped format
+        #**
+        """
+        secret = self.getSecret(key)
+        Initial16bytes='0123456789012345'
+        cipher = AES.new(secret[0:32],AES.MODE_CBC,Initial16bytes)
+        return self.depad((cipher.decrypt(decodestring(msg))))