C++ (Cpp) EC_Group::blinded_base_point_multiply Examples

Example #1

File: timing_tests.cpp Project: noloader/botan

ticks ECC_Mul_Timing_Test::measure_critical_function(std::vector<uint8_t> input)
   {
   const Botan::BigInt k(input.data(), input.size());

   ticks start = get_ticks();

   const Botan::PointGFp k_times_P = m_group.blinded_base_point_multiply(k, Timing_Test::timing_test_rng(), m_ws);

   ticks end = get_ticks();

   return (end - start);
   }

Example #2

File: timing_tests.cpp Project: noloader/botan

ticks ECDSA_Timing_Test::measure_critical_function(std::vector<uint8_t> input)
   {
   const Botan::BigInt k(input.data(), input.size());
   const Botan::BigInt msg(5); // fixed message to minimize noise

   ticks start = get_ticks();

   //The following ECDSA operations involve and should not leak any information about k.

   const Botan::BigInt k_inv = Botan::inverse_mod(k, m_group.get_order());
   const Botan::PointGFp k_times_P = m_group.blinded_base_point_multiply(k, Timing_Test::timing_test_rng(), m_ws);
   const Botan::BigInt r = m_group.mod_order(k_times_P.get_affine_x());
   const Botan::BigInt s = m_group.multiply_mod_order(k_inv, mul_add(m_x, r, msg));

   BOTAN_UNUSED(r, s);

   ticks end = get_ticks();

   return (end - start);
   }