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diff --git a/libqpdf/qpdf/SecureRandomDataProvider.hh b/libqpdf/qpdf/SecureRandomDataProvider.hh
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+#ifndef __SECURERANDOMDATAPROVIDER_HH__
+#define __SECURERANDOMDATAPROVIDER_HH__
+
+#include <qpdf/RandomDataProvider.hh>
+#include <qpdf/DLL.h>
+
+class SecureRandomDataProvider: public RandomDataProvider
+{
+ public:
+ QPDF_DLL
+ SecureRandomDataProvider();
+ QPDF_DLL
+ virtual ~SecureRandomDataProvider();
+
+ QPDF_DLL
+ virtual void provideRandomData(unsigned char* data, size_t len);
+
+ QPDF_DLL
+ static RandomDataProvider* getInstance();
+};
+
+#endif // __SECURERANDOMDATAPROVIDER_HH__