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diff --git a/tinySIP/include/tinysip/authentication/tsip_rijndael.h b/tinySIP/include/tinysip/authentication/tsip_rijndael.h
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+/*
+* Copyright (C) 2010-2011 Mamadou Diop.
+*
+* Contact: Mamadou Diop <diopmamadou(at)doubango[dot]org>
+*	
+* This file is part of Open Source Doubango Framework.
+*
+* DOUBANGO is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*	
+* DOUBANGO is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*	
+* You should have received a copy of the GNU General Public License
+* along with DOUBANGO.
+*
+*/
+
+/**@file tsip_rijndael.h
+ * @brief Rijndael Implementation.
+ *
+
+ * @section DESCRIPTION
+ *
+ * @sa 3G Security
+ * <a href="http://www.3gpp.org/ftp/Specs/html-info/35205.htm"> 3GPP TS 35.205 </a>
+ * <a href="http://www.3gpp.org/ftp/Specs/html-info/35206.htm"> 3GPP TS 35.206 </a>
+ * <a href="http://www.3gpp.org/ftp/Specs/html-info/35207.htm"> 3GPP TS 35.207 </a>
+ * <a href="http://www.3gpp.org/ftp/Specs/html-info/35208.htm"> 3GPP TS 35.208 </a>
+ * <a href="http://www.3gpp.org/ftp/Specs/html-info/35909.htm"> 3GPP TS 35.909 </a>
+ *-------------------------------------------------------------------
+ *                      Rijndael Implementation
+ *-------------------------------------------------------------------
+ *
+ *  A sample 32-bit orientated implementation of Rijndael, the
+ *  suggested kernel for the example 3GPP authentication and key
+ *  agreement functions.
+ *
+ *  This implementation draws on the description in section 5.2 of
+ *  the AES proposal and also on the implementation by
+ *  Dr B. R. Gladman <brg@gladman.uk.net> 9th October 2000.
+ *  It uses a number of large (4k) lookup tables to implement the
+ *  algorithm in an efficient manner.
+ *
+ *  Note: in this implementation the State is stored in four 32-bit
+ *  words, one per column of the State, with the top byte of the
+ *  column being the _least_ significant byte of the word.
+ *
+ *-----------------------------------------------------------------
+ *
+ * @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
+ *
+
+ */
+#ifndef TINYSIP_AUTHENTICATION_RIJNDAEL_H
+#define TINYSIP_AUTHENTICATION_RIJNDAEL_H
+
+#include "tinysip_config.h"
+
+TSIP_BEGIN_DECLS
+
+void RijndaelKeySchedule( uint8_t key[16] );
+void RijndaelEncrypt( uint8_t in[16], uint8_t out[16] );
+
+TSIP_END_DECLS
+
+#endif /*TINYSIP_AUTHENTICATION_RIJNDAEL_H*/