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diff --git a/lib/libUPnP/Neptune/Source/Core/NptDigest.h b/lib/libUPnP/Neptune/Source/Core/NptDigest.h
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+/*****************************************************************
+|
+|   Neptune - Message Digests
+|
+| Copyright (c) 2002-2010, Axiomatic Systems, LLC.
+| All rights reserved.
+|
+| Redistribution and use in source and binary forms, with or without
+| modification, are permitted provided that the following conditions are met:
+|     * Redistributions of source code must retain the above copyright
+|       notice, this list of conditions and the following disclaimer.
+|     * Redistributions in binary form must reproduce the above copyright
+|       notice, this list of conditions and the following disclaimer in the
+|       documentation and/or other materials provided with the distribution.
+|     * Neither the name of Axiomatic Systems nor the
+|       names of its contributors may be used to endorse or promote products
+|       derived from this software without specific prior written permission.
+|
+| THIS SOFTWARE IS PROVIDED BY AXIOMATIC SYSTEMS ''AS IS'' AND ANY
+| EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+| WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+| DISCLAIMED. IN NO EVENT SHALL AXIOMATIC SYSTEMS BE LIABLE FOR ANY
+| DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+| LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+| ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+| SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+|
+ ****************************************************************/
+
+#ifndef _NPT_DIGEST_H_
+#define _NPT_DIGEST_H_
+
+/*----------------------------------------------------------------------
+|   includes
++---------------------------------------------------------------------*/
+#include "NptTypes.h"
+#include "NptDataBuffer.h"
+
+/*----------------------------------------------------------------------
+|   NPT_Digest
++---------------------------------------------------------------------*/
+class NPT_Digest {
+public:
+    // types
+    typedef enum {
+        ALGORITHM_SHA1,
+        ALGORITHM_SHA256,
+        ALGORITHM_MD5
+    } Algorithm;
+    
+    // factory
+    static NPT_Result Create(Algorithm algorithm, NPT_Digest*& digest);
+    
+    // methods
+    virtual             ~NPT_Digest() {}
+    virtual unsigned int GetSize() = 0;
+    virtual NPT_Result   Update(const NPT_UInt8* data, NPT_Size data_size) = 0;
+    virtual NPT_Result   GetDigest(NPT_DataBuffer& digest) = 0;
+
+protected:
+    NPT_Digest() {} // don't instantiate directly
+};
+
+class NPT_Hmac {
+public:
+    static NPT_Result Create(NPT_Digest::Algorithm algorithm,
+                             const NPT_UInt8*      key,
+                             NPT_Size              key_size, 
+                             NPT_Digest*&          digest);
+
+private:
+    // methods
+    NPT_Hmac() {} // don't instantiate
+};
+
+#endif // _NPT_DIGEST_H_