Add blinded_base_point_multiply_x

Often useful when the point is not needed

1 files changed, 7 insertions, 0 deletions

diff --git a/src/lib/pubkey/ec_group/ec_group.cpp b/src/lib/pubkey/ec_group/ec_group.cpp
index 723a4148e..5fb79c923 100644
--- a/src/lib/pubkey/ec_group/ec_group.cpp
+++ b/src/lib/pubkey/ec_group/ec_group.cpp
@@ -483,6 +483,13 @@ PointGFp EC_Group::blinded_base_point_multiply(const BigInt& k,
    return data().blinded_base_point_multiply(k, rng, ws);
    }
 
+BigInt EC_Group::blinded_base_point_multiply_x(const BigInt& k,
+                                               RandomNumberGenerator& rng,
+                                               std::vector<BigInt>& ws) const
+   {
+   return data().blinded_base_point_multiply(k, rng, ws).get_affine_x();
+   }
+
 PointGFp EC_Group::blinded_var_point_multiply(const PointGFp& point,
                                               const BigInt& k,
                                               RandomNumberGenerator& rng,