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diff --git a/ext/aes/gstaeshelper.h b/ext/aes/gstaeshelper.h
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+/* 
+ * GStreamer gstreamer-aeshelper
+ *
+ * Copyright, LCC (C) 2015 RidgeRun, LCC <carsten.behling@ridgerun.com>
+ * Copyright, 2020 Nice, Contact: Rabindra Harlalka <Rabindra.Harlalka@nice.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Alternatively, the contents of this file may be used under the
+ * GNU Lesser General Public License Version 2.1 (the "LGPL"), in
+ * which case the following provisions apply instead of the ones
+ * mentioned above:
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1335, USA.
+ */
+
+#ifndef __GST_AES_HELPER_H__
+#define __GST_AES_HELPER_H__
+
+#include <gst/gst.h>
+#include <openssl/conf.h>
+#include <openssl/evp.h>
+#include <openssl/err.h>
+
+/**
+ * GstAesCipher:
+ * @GST_AES_CIPHER_128_CBC: AES cipher with 128 bit key using CBC
+ * @GST_AES_CIPHER_256_CBC: AES cipher with 256 bit key using CBC
+ *
+ * Type of AES cipher to use
+ *
+ * Since: 1.20
+ */
+
+typedef enum {
+	GST_AES_CIPHER_128_CBC,
+	GST_AES_CIPHER_256_CBC
+} GstAesCipher;
+
+#define GST_AES_DEFAULT_SERIALIZE_IV FALSE
+#define GST_AES_DEFAULT_KEY ""
+#define GST_AES_DEFAULT_IV ""
+#define GST_AES_DEFAULT_CIPHER_MODE GST_AES_CIPHER_128_CBC
+#define GST_AES_PER_BUFFER_PADDING_DEFAULT TRUE
+#define GST_AES_BLOCK_SIZE 16
+/* only 128 or 256 bit key length is supported */
+#define GST_AES_MAX_KEY_SIZE 32
+
+enum
+{
+  PROP_0,
+  PROP_CIPHER,
+  PROP_SERIALIZE_IV,
+  PROP_KEY,
+  PROP_IV,
+  PROP_PER_BUFFER_PADDING
+};
+
+G_BEGIN_DECLS
+
+GType gst_aes_cipher_get_type (void);
+#define GST_TYPE_AES_CIPHER (gst_aes_cipher_get_type ())
+const gchar* gst_aes_cipher_enum_to_string (GstAesCipher cipher);
+
+gchar
+gst_aes_nibble_to_hex (gchar in);
+gchar *
+gst_aes_bytearray2hexstring (const guchar * in, gchar * const out,
+    const gushort len);
+guint
+gst_aes_hexstring2bytearray (GstElement * filter, const gchar * in,
+    guchar * out);
+
+G_END_DECLS
+#endif /* __GST_AES_HELPER_H__ */