1 files changed, 84 insertions, 0 deletions
diff --git a/src/libs/3rdparty/botan/src/lib/pubkey/ec_group/point_mul.h b/src/libs/3rdparty/botan/src/lib/pubkey/ec_group/point_mul.h
new file mode 100644
index 0000000000..dbaae29950
--- /dev/null
+++ b/src/libs/3rdparty/botan/src/lib/pubkey/ec_group/point_mul.h
@@ -0,0 +1,84 @@
+/*
+* (C) 2018 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_POINT_MUL_H_
+#define BOTAN_POINT_MUL_H_
+
+#include <botan/point_gfp.h>
+
+namespace Botan {
+
+class Modular_Reducer;
+
+static const size_t PointGFp_SCALAR_BLINDING_BITS = 80;
+
+class PointGFp_Base_Point_Precompute final
+   {
+   public:
+      PointGFp_Base_Point_Precompute(const PointGFp& base_point,
+                                     const Modular_Reducer& mod_order);
+
+      PointGFp mul(const BigInt& k,
+                   RandomNumberGenerator& rng,
+                   const BigInt& group_order,
+                   std::vector<BigInt>& ws) const;
+   private:
+      const PointGFp& m_base_point;
+      const Modular_Reducer& m_mod_order;
+
+      const size_t m_p_words;
+      const size_t m_T_size;
+
+      /*
+      * This is a table of T_size * 3*p_word words
+      */
+      std::vector<word> m_W;
+   };
+
+class PointGFp_Var_Point_Precompute final
+   {
+   public:
+      PointGFp_Var_Point_Precompute(const PointGFp& point,
+                                    RandomNumberGenerator& rng,
+                                    std::vector<BigInt>& ws);
+
+      PointGFp mul(const BigInt& k,
+                   RandomNumberGenerator& rng,
+                   const BigInt& group_order,
+                   std::vector<BigInt>& ws) const;
+   private:
+      const CurveGFp m_curve;
+      const size_t m_p_words;
+      const size_t m_window_bits;
+
+      /*
+      * Table of 2^window_bits * 3*2*p_word words
+      * Kept in locked vector since the base point might be sensitive
+      * (normally isn't in most protocols but hard to say anything
+      * categorically.)
+      */
+      secure_vector<word> m_T;
+   };
+
+class PointGFp_Multi_Point_Precompute final
+   {
+   public:
+      PointGFp_Multi_Point_Precompute(const PointGFp& g1,
+                                      const PointGFp& g2);
+
+      /*
+      * Return (g1*k1 + g2*k2)
+      * Not constant time, intended to use with public inputs
+      */
+      PointGFp multi_exp(const BigInt& k1,
+                         const BigInt& k2) const;
+   private:
+      std::vector<PointGFp> m_M;
+   };
+
+}
+
+#endif