1 files changed, 34 insertions, 0 deletions
diff --git a/src/math/numbertheory/reducer.h b/src/math/numbertheory/reducer.h
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+++ b/src/math/numbertheory/reducer.h
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+/*************************************************
+* Modular Reducer Header File                    *
+* (C) 1999-2007 Jack Lloyd                       *
+*************************************************/
+
+#ifndef BOTAN_MODARITH_H__
+#define BOTAN_MODARITH_H__
+
+#include <botan/bigint.h>
+
+namespace Botan {
+
+/*************************************************
+* Modular Reducer                                *
+*************************************************/
+class BOTAN_DLL Modular_Reducer
+   {
+   public:
+      BigInt multiply(const BigInt&, const BigInt&) const;
+      BigInt square(const BigInt&) const;
+      BigInt reduce(const BigInt&) const;
+
+      bool initialized() const { return (mod_words != 0); }
+
+      Modular_Reducer() { mod_words = 0; }
+      Modular_Reducer(const BigInt&);
+   private:
+      BigInt modulus, modulus_2, mu;
+      u32bit mod_words, mod2_words, mu_words;
+   };
+
+}
+
+#endif