Consolidated all the crypto apis and implemented the Precomputation Postprocessing step

2 files changed, 53 insertions, 24 deletions

diff --git a/node/node.cpp b/node/node.cpp
index 98b5873..a781755 100644
--- a/node/node.cpp
+++ b/node/node.cpp
@@ -115,28 +115,6 @@ void Node::handle_node_secretkey(cmix_proto::SecretKey const& secret)
 }
 
 template <typename T>
-cmix_proto::PreMix fill_precomputation_mix_message(CMixContext const& ctx, T const& rs, T const& ms) {
-	cmix_proto::PreMix premix;
-	for(size_t i = 0; i < ctx.nr_participants; ++i) {
-		auto new_pos = ctx.permutation[i];
-		size_t el_len = get_group_element_array_size(&ctx);
-		
-		premix.mutable_r_epirs(new_pos)->resize(el_len);
-		premix.mutable_m_epirs(new_pos)->resize(el_len);
-		
-		multiply_s(
-			&ctx,
-			&(*premix.mutable_r_epirs(new_pos))[0],
-			&(*premix.mutable_m_epirs(new_pos))[0],
-			rs.Get(i).data(),
-			ms.Get(i).data(),
-			i
-		);
-	}
-	return premix;
-}
-
-template <typename T>
 cmix_proto::PrePre fill_precomputation_pre_message(CMixContext& ctx, T const& rs, T const& ms) {
 	if(start_mix(&ctx, rs.size()) != no_error) {
 		exit(-1);
@@ -148,7 +126,7 @@ cmix_proto::PrePre fill_precomputation_pre_message(CMixContext& ctx, T const& rs
 	
 	cmix_proto::PrePre prepre;
 	
-	for(int i = 0; i < rs.size(); ++i) {
+	for(size_t i = 0; i < ctx.nr_participants; ++i) {
 		size_t len = get_group_element_array_size(&ctx);
 		
 		prepre.mutable_m_er(i)->resize(len);
@@ -168,6 +146,41 @@ cmix_proto::PrePre fill_precomputation_pre_message(CMixContext& ctx, T const& rs
 	return prepre;
 }
 
+template <typename T>
+cmix_proto::PreMix fill_precomputation_mix_message(CMixContext const& ctx, T const& rs, T const& ms) {
+	cmix_proto::PreMix premix;
+	for(size_t i = 0; i < ctx.nr_participants; ++i) {
+		auto new_pos = ctx.permutation[i];
+		size_t el_len = get_group_element_array_size(&ctx);
+		
+		premix.mutable_r_epirs(new_pos)->resize(el_len);
+		premix.mutable_m_epirs(new_pos)->resize(el_len);
+		
+		multiply_s(
+			&ctx,
+			&(*premix.mutable_r_epirs(new_pos))[0],
+			&(*premix.mutable_m_epirs(new_pos))[0],
+			rs.Get(i).data(),
+			ms.Get(i).data(),
+			i
+		);
+	}
+	return premix;
+}
+
+template <typename T>
+cmix_proto::PrePost fill_precomputation_post_message(CMixContext& ctx, T const& rs, T const& ms) {
+	cmix_proto::PrePost prepost;
+	
+	for(size_t i = 0; i < ctx.nr_participants; ++i) {
+		post_process(&ctx, rs.Get(i).data(), ms.Get(i).data(), i);
+		*prepost.mutable_r_epirs(i) = rs.Get(i);
+		*prepost.mutable_m_epirs(i) = ms.Get(i);
+	}
+	
+	return prepost;
+}
+
 void Node::handle_node_prepre(cmix_proto::PrePre const& pre) {
 	if(network_settings.is_first) {
 		cmix_proto::PreMix premix = fill_precomputation_mix_message(cmix_ctx, pre.r_er(), pre.m_er());
@@ -180,13 +193,23 @@ void Node::handle_node_prepre(cmix_proto::PrePre const& pre) {
 
 void Node::handle_node_premix(cmix_proto::PreMix const& premix) {
 	if(network_settings.is_first) {
-		
+		cmix_proto::PrePost prepost = fill_precomputation_post_message(cmix_ctx, premix.r_epirs(), premix.m_epirs());
+		next_node.async_send(prepost);	
 	} else {
 		cmix_proto::PreMix n_premix = fill_precomputation_mix_message(cmix_ctx, premix.r_epirs(), premix.m_epirs());
 		next_node.async_send(n_premix);
 	}
 }
 
+void Node::handle_node_prepost(cmix_proto::PrePost const& prepost) {
+	if(network_settings.is_first) {
+		
+	} else {
+		cmix_proto::PrePost n_prepost = fill_precomputation_post_message(cmix_ctx, prepost.r_epirs(), prepost.m_epirs());
+		next_node.async_send(n_prepost);
+	}
+}
+
 void Node::handle_node_message(cmix_proto::CMixMessage message)
 {
 	switch(message.contents_case()) {
@@ -215,6 +238,11 @@ void Node::handle_node_message(cmix_proto::CMixMessage message)
 			handle_node_premix(message.premix());
 			break;
 		}
+		case cmix_proto::CMixMessage::ContentsCase::kPrepost: {
+			BOOST_LOG_TRIVIAL(trace) << "Handling PrePost";
+			handle_node_prepost(message.prepost());
+			break;
+		}
 		default: {
 			BOOST_LOG_TRIVIAL(error) << "handle_node_message: CMixMessage contains unknown contents.";
 		}
diff --git a/node/node.hpp b/node/node.hpp
index 6587556..a143359 100644
--- a/node/node.hpp
+++ b/node/node.hpp
@@ -83,6 +83,7 @@ class Node
 	void handle_node_secretkey(cmix_proto::SecretKey const& secret);
 	void handle_node_prepre(cmix_proto::PrePre const& prepre);
 	void handle_node_premix(cmix_proto::PreMix const& premix);
+	void handle_node_prepost(cmix_proto::PrePost const& prepost);
 	void handle_node_message(cmix_proto::CMixMessage message);
 	
 	void handle_client_keyexchange(ClientConnections::key_type handle, cmix_proto::KeyExchange ke);