From 683952d8c7b3bec0c3711f5f04db7fe53316a831 Mon Sep 17 00:00:00 2001
From: Iraklis Leontiadis <iraklis@zengo.com>
Date: Tue, 15 Aug 2023 10:26:28 +0300
Subject: [PATCH 1/2] init

---
 Cargo.toml                    | 2 +-
 src/ecdsa/two_party/party1.rs | 2 ++
 src/ecdsa/two_party/party2.rs | 2 +-
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index a1560c9..7997cfc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,4 +11,4 @@ edition = "2021"
 [dependencies]
 rand = "0.8"
 serde = { version = "1", features = ["derive"] }
-two-party-ecdsa = { git = "https://github.com/ZenGo-X/two-party-ecdsa.git" }
+two-party-ecdsa = { git = "https://github.com/ZenGo-X/two-party-ecdsa.git" ,branch = "party1-msg1-rand-range"}
diff --git a/src/ecdsa/two_party/party1.rs b/src/ecdsa/two_party/party1.rs
index 48a53fd..b13a171 100644
--- a/src/ecdsa/two_party/party1.rs
+++ b/src/ecdsa/two_party/party1.rs
@@ -32,6 +32,7 @@ pub struct KeyGenParty1Message2 {
     pub ecdh_second_message: party_one::KeyGenSecondMsg,
     pub ek: EncryptionKey,
     pub c_key: BigInt,
+    pub encrypted_share_minus_q_thirds: BigInt,
     pub correct_key_proof: NICorrectKeyProof,
     pub range_proof: RangeProofNi,
 }
@@ -131,6 +132,7 @@ impl MasterKey1 {
                 ecdh_second_message: key_gen_second_message,
                 ek: paillier_key_pair.ek.clone(),
                 c_key: paillier_key_pair.encrypted_share.clone(),
+                encrypted_share_minus_q_thirds:paillier_key_pair.encrypted_share_minus_q_thirds.clone(),
                 correct_key_proof,
                 range_proof,
             },
diff --git a/src/ecdsa/two_party/party2.rs b/src/ecdsa/two_party/party2.rs
index ea50650..ddf2e5f 100644
--- a/src/ecdsa/two_party/party2.rs
+++ b/src/ecdsa/two_party/party2.rs
@@ -115,7 +115,7 @@ impl MasterKey2 {
         (),
     > {
         let paillier_encryption_key = party_one_second_message.ek.clone();
-        let paillier_encrypted_share = party_one_second_message.c_key.clone();
+        let paillier_encrypted_share = party_one_second_message.encrypted_share_minus_q_thirds.clone();
 
         let party_two_second_message =
             party_two::KeyGenSecondMsg::verify_commitments_and_dlog_proof(

From 67ae47f74dfaa33b4264351a9b8afca400f6f3e5 Mon Sep 17 00:00:00 2001
From: Iraklis Leontiadis <iraklis@zengo.com>
Date: Tue, 15 Aug 2023 11:00:23 +0300
Subject: [PATCH 2/2] debug

---
 src/ecdsa/two_party/party2.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/ecdsa/two_party/party2.rs b/src/ecdsa/two_party/party2.rs
index ddf2e5f..dc0cb0f 100644
--- a/src/ecdsa/two_party/party2.rs
+++ b/src/ecdsa/two_party/party2.rs
@@ -123,7 +123,7 @@ impl MasterKey2 {
                 &party_one_second_message.ecdh_second_message,
             );
 
-        let party_two_paillier = party_two::PaillierPublic {
+        let mut party_two_paillier = party_two::PaillierPublic {
             ek: paillier_encryption_key.clone(),
             encrypted_secret_share: paillier_encrypted_share.clone(),
         };
@@ -132,7 +132,7 @@ impl MasterKey2 {
             &party_two_paillier,
             &party_one_second_message.range_proof,
         );
-
+        party_two_paillier.encrypted_secret_share = party_one_second_message.c_key.clone();
         let (pdl_first_message, pdl_chal) = party_two_paillier.pdl_challenge(
             &party_one_second_message
                 .ecdh_second_message