store headers only once, refs #7

actlibrary/include/actIDerivatorWithHash.h

@@ -0,0 +1,33 @@
+//////////////////////////////////////////////////////////////////////////////////
+// Name:      actIDerivatorWithHash.h
+// Product:   cv act library
+// Purpose:   The abstract class IDerivatorWithHash is derived from IDerivator and
+//            uses hash algorithms. 
+//
+// Copyright: (c) 2000 cv cryptovision GmbH
+//            all rights reserved
+// Licence:   The conditions for the use of this software are regulated 
+//            in the cv act library licence agreement.
+//////////////////////////////////////////////////////////////////////////////////
+
+#ifndef ACT_IDerivatorWithHash_h
+#define ACT_IDerivatorWithHash_h
+
+#include "actIDerivator.h"
+
+namespace act
+{
+	class IHashAlg;
+
+	class IDerivatorWithHash : public IDerivator
+	{
+	public:
+		virtual void SetHash(IHashAlg* hash) =0;
+		virtual const IHashAlg* GetHash() const =0;
+		virtual IHashAlg* GetHash() =0;
+	};
+} // namespace act
+
+#endif
+
+