add encryption

libs/client_server/piclient_server_client.cpp

@@ -71,6 +71,15 @@ int PIClientServer::Client::write(const void * d, const size_t s) {
 }
 
 
+void PIClientServer::Client::enableSymmetricEncryption(const PIByteArray & key) {
+	if (key.isNotEmpty()) {
+		stream.setCryptEnabled(true);
+		stream.setCryptKey(key);
+	} else
+		stream.setCryptEnabled(false);
+}
+
+
 void PIClientServer::Client::createForServer(PIEthernet * tcp_) {
 	tcp = tcp_;
 	tcp->setParameter(PIEthernet::KeepConnection, false);

libs/client_server/piclient_server_server.cpp

@@ -91,6 +91,11 @@ void PIClientServer::Server::setMaxClients(int new_max_clients) {
 }
 
 
+void PIClientServer::Server::enableSymmetricEncryption(const PIByteArray & key) {
+	crypt_key = key;
+}
+
+
 void PIClientServer::Server::stopServer() {
 	if (!tcp_server) return;
 	tcp_server->stopAndWait();
@@ -98,8 +103,9 @@ void PIClientServer::Server::stopServer() {
 
 
 void PIClientServer::Server::newClient(Client * c) {
-	c->readed_func = [this, c](PIByteArray ba) { readed(c, ba); };
 	clients << c;
+	c->enableSymmetricEncryption(crypt_key);
+	c->readed_func = [this, c](PIByteArray ba) { readed(c, ba); };
 	c->tcp->startThreadedRead();
 	c->connected();
 	piCout << "New client";

libs/main/client_server/piclient_server_client.h

@@ -54,6 +54,8 @@ public:
 	int write(const void * d, const size_t s);
 	int write(const PIByteArray & ba) { return write(ba.data(), ba.size()); }
 
+	void enableSymmetricEncryption(const PIByteArray & key);
+
 protected:
 	virtual void readed(PIByteArray data) {}
 	virtual void connected() {}

libs/main/client_server/piclient_server_server.h

@@ -49,7 +49,7 @@ public:
 
 	void setClientFactory(std::function<Client *()> f) { client_factory = f; }
 
-	void write(Client * c, const PIByteArray & data);
+	void enableSymmetricEncryption(const PIByteArray & key);
 
 protected:
 	virtual void readed(Client * c, PIByteArray data) {}
@@ -61,6 +61,7 @@ private:
 	std::function<Client *()> client_factory;
 	PIEthernet * tcp_server = nullptr;
 	PIThread * clean_thread = nullptr;
+	PIByteArray crypt_key;
 	PIVector<Client *> clients;
 	PIMutex clients_mutex;