From f93d52bbd0053574fb35d72b85c4b299dc1f3ee5 Mon Sep 17 00:00:00 2001
From: Dennis Brentjes <d.brentjes@gmail.com>
Date: Sat, 12 Nov 2016 13:48:30 +0100
Subject: Fixes decryption share calculation, adds lots of debugging
 statements.

---
 node/node.cpp | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 64 insertions(+), 3 deletions(-)

(limited to 'node/node.cpp')

diff --git a/node/node.cpp b/node/node.cpp
index b5c8506..5bce063 100644
--- a/node/node.cpp
+++ b/node/node.cpp
@@ -11,19 +11,40 @@ using namespace boost::asio::ip;
 
 Node::Node(ListenSettings const& listen_settings, NodeNetworkSettings network_settings)
 : io_service()
+, timer(io_service)
 , ssl_ctx(std::make_shared<boost::asio::ssl::context>(boost::asio::ssl::context::sslv23))
 , server(io_service, listen_settings, ssl_ctx, [this](std::unique_ptr<boost::asio::ssl::stream<boost::asio::ip::tcp::socket>>&& socket, std::shared_ptr<boost::asio::ssl::context> ctx){accept_handler(std::move(socket), ctx);})
 , clients()
 , data()
+, messages()
 , network_settings(network_settings)
 , prev_node(SSLReceiver(std::unique_ptr<boost::asio::ssl::stream<tcp::socket>>(new boost::asio::ssl::stream<boost::asio::ip::tcp::socket>(io_service, *ssl_ctx))))
 , next_node(SSLSender(std::unique_ptr<boost::asio::ssl::stream<tcp::socket>>(new boost::asio::ssl::stream<boost::asio::ip::tcp::socket>(io_service, *ssl_ctx))))
 , cmix_ctx(initialize_cmix_context(get_implementation()))
-, precomputation_data()
 , shutting_down(false)
 {
 	initialize_keypair(&cmix_ctx);
 	
+	std::string x = to_string(cmix_ctx.keypair.sec, cmix_ctx);
+	std::string y = to_string(cmix_ctx.keypair.pub, cmix_ctx);
+	{
+		std::stringstream ss;
+		ss << "sec: ";
+		for(auto&& c : x) {
+			ss << "\\" << std::setw(3) << std::setfill('0') << std::oct << (unsigned int) c;
+		}
+		BOOST_LOG_TRIVIAL(trace) << ss.str();
+	}
+	
+	{
+		std::stringstream ss;
+		ss << "pub: ";
+		for(auto&& c : y) {
+			ss << "\\" << std::setw(3) << std::setfill('0') << std::oct << (unsigned int) c;
+		}
+		BOOST_LOG_TRIVIAL(trace) << ss.str();
+	} 
+	
 	GOOGLE_PROTOBUF_VERIFY_VERSION;
 
 	if(network_settings.is_first) {
@@ -131,14 +152,15 @@ void Node::handle_message(Purgatory::iterator handle, cmix_proto::CMixMessage me
 }
 
 void Node::start_precomputation() {
+	BOOST_LOG_TRIVIAL(trace) << "Starting precomputation for " << clients.size() << " clients.";
+	index_map.clear();
 	if(start_mix(&cmix_ctx, clients.size()) != no_error) {
 		exit(-1);
 	}
 	
-	int i = 0;
+	unsigned int i = 0;
 	for(auto&& pair : clients) {
 		index_map[pair.first] = i++;
-		generate_random_message(&cmix_ctx, i);
 	}
 	
 	if(initialize_mix_randomness(&cmix_ctx) != no_error) {
@@ -148,15 +170,54 @@ void Node::start_precomputation() {
 	cmix_proto::PrePre prepre;
 	
 	for(size_t i = 0; i < cmix_ctx.nr_participants; ++i) {
+		prepre.add_m_er();
+		prepre.add_r_er();
+	
 		size_t len = get_group_element_array_size(&cmix_ctx);
 		
 		prepre.mutable_r_er(i)->resize(len);
 		prepre.mutable_m_er(i)->resize(len);
 		
+		{
+			std::stringstream ss;
+			ss << "r: ";
+			std::string r = to_string(cmix_ctx.r[i], cmix_ctx);
+			for(auto&& c : r) {
+				ss << "\\" << std::setw(3) << std::setfill('0') << std::oct << (unsigned int) c;
+			}
+			BOOST_LOG_TRIVIAL(trace) << ss.str();
+		} 
+		
 		if(encrypt_r(&cmix_ctx, &(*prepre.mutable_r_er(i))[0], &(*prepre.mutable_m_er(i))[0], i) != no_error) {
 			exit(-1);
 		}
 	}
 	
+	BOOST_LOG_TRIVIAL(trace) << "Sending prepre message: " << prepre.ShortDebugString();
 	next_node.async_send(prepre);
 }
+
+void Node::start_realtime_phase() {
+	
+	cmix_proto::RealPre realpre;
+	
+	size_t len = get_group_element_array_size(&cmix_ctx);
+	for(auto&& pair : index_map) {
+		realpre.add_h();
+		realpre.add_m();
+		realpre.mutable_m(pair.second)->resize(len);
+		std::decay<decltype(pair)>::type::first_type const& handle = pair.first;
+		std::decay<decltype(pair)>::type::second_type const& index = pair.second;
+		
+		auto& queue = messages[pair.first];
+		if(queue.empty()) {
+			std::vector<char> v(len);
+			generate_random_message(&cmix_ctx, v.data());
+			swap_k_for_r(&cmix_ctx, &(*realpre.mutable_m(index))[0], v.data(), data[handle].shared_value, index);
+		} else {
+			swap_k_for_r(&cmix_ctx, &(*realpre.mutable_m(index))[0], queue.front().data(), data[handle].shared_value, index);
+		}
+		*realpre.mutable_h(index) = handle;
+	}
+	next_node.async_send(realpre);
+}
-- 
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