1 files changed, 68 insertions, 0 deletions
diff --git a/src/libs/3rdparty/botan/src/lib/math/numbertheory/def_powm.h b/src/libs/3rdparty/botan/src/lib/math/numbertheory/def_powm.h
new file mode 100644
index 0000000000..6b1f33835f
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+++ b/src/libs/3rdparty/botan/src/lib/math/numbertheory/def_powm.h
@@ -0,0 +1,68 @@
+/*
+* Modular Exponentiation
+* (C) 1999-2007 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_DEFAULT_MODEXP_H_
+#define BOTAN_DEFAULT_MODEXP_H_
+
+#include <botan/pow_mod.h>
+#include <botan/reducer.h>
+#include <vector>
+
+namespace Botan {
+
+/**
+* Fixed Window Exponentiator
+*/
+class Fixed_Window_Exponentiator final : public Modular_Exponentiator
+   {
+   public:
+      void set_exponent(const BigInt&) override;
+      void set_base(const BigInt&) override;
+      BigInt execute() const override;
+
+      Modular_Exponentiator* copy() const override
+         { return new Fixed_Window_Exponentiator(*this); }
+
+      Fixed_Window_Exponentiator(const BigInt&, Power_Mod::Usage_Hints);
+   private:
+      Modular_Reducer m_reducer;
+      BigInt m_exp;
+      size_t m_window_bits;
+      std::vector<BigInt> m_g;
+      Power_Mod::Usage_Hints m_hints;
+   };
+
+class Montgomery_Params;
+class Montgomery_Exponentation_State;
+
+/**
+* Montgomery Exponentiator
+*/
+class Montgomery_Exponentiator final : public Modular_Exponentiator
+   {
+   public:
+      void set_exponent(const BigInt&) override;
+      void set_base(const BigInt&) override;
+      BigInt execute() const override;
+
+      Modular_Exponentiator* copy() const override
+         { return new Montgomery_Exponentiator(*this); }
+
+      Montgomery_Exponentiator(const BigInt&, Power_Mod::Usage_Hints);
+   private:
+      BigInt m_p;
+      Modular_Reducer m_mod_p;
+      std::shared_ptr<const Montgomery_Params> m_monty_params;
+      std::shared_ptr<const Montgomery_Exponentation_State> m_monty;
+
+      BigInt m_e;
+      Power_Mod::Usage_Hints m_hints;
+   };
+
+}
+
+#endif