Initial revision

1 files changed, 46 insertions, 0 deletions

diff --git a/randpool.h b/randpool.h
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index 00000000..6bbe32f7
--- /dev/null
+++ b/randpool.h
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+#ifndef CRYPTOPP_RANDPOOL_H
+#define CRYPTOPP_RANDPOOL_H
+
+#include "cryptlib.h"
+#include "filters.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! Randomness Pool
+/*! This class can be used to generate
+	pseudorandom bytes after seeding the pool with
+	the Put() methods */
+class RandomPool : public RandomNumberGenerator,
+				   public Bufferless<BufferedTransformation>
+{
+public:
+	//! poolSize must be greater than 16
+	RandomPool(unsigned int poolSize=384);
+
+	unsigned int Put2(const byte *begin, unsigned int, int messageEnd, bool blocking);
+
+	bool AnyRetrievable() const {return true;}
+	unsigned long MaxRetrievable() const {return ULONG_MAX;}
+
+	unsigned int TransferTo2(BufferedTransformation &target, unsigned long &transferBytes, const std::string &channel=NULL_CHANNEL, bool blocking=true);
+	unsigned int CopyRangeTo2(BufferedTransformation &target, unsigned long &begin, unsigned long end=ULONG_MAX, const std::string &channel=NULL_CHANNEL, bool blocking=true) const
+	{
+		throw NotImplemented("RandomPool: CopyRangeTo2() is not supported by this store");
+	}
+
+	byte GenerateByte();
+	void GenerateBlock(byte *output, unsigned int size);
+
+	void IsolatedInitialize(const NameValuePairs &parameters) {}
+
+protected:
+	void Stir();
+
+private:
+	SecByteBlock pool, key;
+	unsigned int addPos, getPos;
+};
+
+NAMESPACE_END
+
+#endif