Merge pull request #7 from Safeheron/more_zk_proof_in_gg18

Import no small factor proof into GG18/GG20

Author: lougon

proto/gg18/key_gen.proto

@@ -30,6 +30,7 @@ message Round1BCMessage {
 // P2P message in round 1
 message Round1P2PMessage {
     string x_ij = 3;
+    safeheron.proto.NoSmallFactorProof nsf_proof = 4;
 }
 
 // Broadcasting message in round 2

proto/gg18/key_refresh.proto

@@ -21,6 +21,7 @@ message Round1BCMessage {
     safeheron.proto.DLNProof dln_proof_1 = 5;
     safeheron.proto.DLNProof dln_proof_2 = 6;
     safeheron.proto.PailPub pail_pub = 7;
+    string blind_factor = 8;
 }
 
 message Round1P2PMessage {
@@ -30,6 +31,7 @@ message Round1P2PMessage {
 message Round2P2PMessage {
     safeheron.proto.DLogProof dlog_proof_x = 1;
     safeheron.proto.PailProof pail_proof = 2;
+    safeheron.proto.NoSmallFactorProof nsf_proof = 3;
 }
 
 message Round3BCMessage {

src/multi-party-ecdsa/gg18/key_gen/message.h

@@ -62,6 +62,7 @@ class Round1BCMessage {
 class Round1P2PMessage {
 public:
     safeheron::bignum::BN x_ij_;
+    safeheron::zkp::no_small_factor_proof::NoSmallFactorProof nsf_proof_;
 
 public:
     bool ToProtoObject(safeheron::proto::multi_party_ecdsa::gg18::key_gen::Round1P2PMessage &message) const;