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Use new EC types in ECIES
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randombit committed May 6, 2024
1 parent abb1364 commit b09a762
Showing 1 changed file with 3 additions and 10 deletions.
13 changes: 3 additions & 10 deletions src/lib/pubkey/ecies/ecies.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -66,16 +66,9 @@ class ECIES_ECDH_KA_Operation final : public PK_Ops::Key_Agreement_with_KDF {

secure_vector<uint8_t> raw_agree(const uint8_t w[], size_t w_len) override {
const EC_Group& group = m_key.domain();

EC_Point input_point = group.OS2ECP(w, w_len);
input_point.randomize_repr(m_rng);

const EC_Point S = group.blinded_var_point_multiply(input_point, m_key.private_value(), m_rng, m_ws);

if(S.on_the_curve() == false) {
throw Internal_Error("ECDH agreed value was not on the curve");
}
return S.x_bytes();
const EC_AffinePoint input_point(group, group.OS2ECP(w, w_len));
const auto x = EC_Scalar::from_bigint(group, m_key.private_value());
return input_point.mul(x, m_rng, m_ws).x_bytes();
}

private:
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