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diff --git a/modules/entropy/dev_random/es_dev.h b/modules/entropy/dev_random/es_dev.h
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+/*************************************************
+* Device EntropySource Header File *
+* (C) 1999-2007 Jack Lloyd *
+*************************************************/
+
+#ifndef BOTAN_ENTROPY_SRC_DEVICE_H__
+#define BOTAN_ENTROPY_SRC_DEVICE_H__
+
+#include <botan/rng.h>
+#include <vector>
+
+namespace Botan {
+
+/*************************************************
+* Device Based Entropy Source *
+*************************************************/
+class Device_EntropySource : public EntropySource
+ {
+ public:
+ Device_EntropySource(const std::vector<std::string>& fs) : fsnames(fs) {}
+ u32bit slow_poll(byte[], u32bit);
+ private:
+ std::vector<std::string> fsnames;
+ };
+
+}
+
+#endif