A JavaFX Application (Client) that sends/receives a file over a concurrent server using TLS/SSL with a self-signed certificate.

This application allows you to send/receive a file over a concurrent server using the TLS/SSL protocol with a self-signed certificate. It's assigned a temporary ID (String with 4 alphanumeric chars) to the file receiver client, which can be used by the file sender.

• File send (or safely cancel it without crashing the application)
• File reception (or safely cancel it without crashing the application)
• Select the file using a file chooser
• Concurrent server
• Server: Background thread infinitely pinging all the receptor-type sockets and removing the non-responding ones, acting like a cleaner
• Server: Logger
• Certificate support
• Embedded web browser on the "about" pane that opens this GitHub page

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

It's highly recommended that you edit this project using IntelliJ IDEA from JetBrains that can be downloaded here since it was developed using that same tool.

To generate a a self-signed certificate, locate your keytool on your Java istallation folder and run it. Example (Windows cmd line):

"\Program Files\Java\jdk1.8.0_131\bin\keytool.exe" -genkey -alias filetransfer -keystore keystore.jks

Now we have a certificate under the name of "filetransfer" on the keystore file named "keystore.jks". To export the Public Key Certificate, run:

"\Program Files\Java\jdk1.8.0_131\bin\keytool.exe" -exportcert -keystore keystore.jks -alias filetransfer -file filetransfer.cer

Now you're able to import it on the client keystore:

"\Program Files\Java\jdk1.8.0_131\bin\keytool.exe" -import -file filetransfer.cer -alias filetransfer -keystore truststore.jks

To import your keystore:

System.setProperty("javax.net.ssl.keyStore", "keystore.jks");
System.setProperty("javax.net.ssl.keyStorePassword", "keyStorePassword");

To import your truststore:

System.setProperty("javax.net.ssl.trustStore", "truststore.jks");
System.setProperty("javax.net.ssl.trustStorePassword", "trustStorePassword");

• Icon

The icon used was made by: Fabián Alexis CC BY-SA 3.0, via Wikimedia Commons

If you're only looking for the send/reception code without the user interface, you can find it here (send), and here (receive) fully commented.

Usage examples:

FileReception fileReception = new FileReception("Example.pdf");
System.out.println(fileReception.getId()); // The server generated Id
fileReception.start();

new FileSend("Example.pdf").start();

The rest of the project isn't that much commented but it's mainly JavaFX operations.

• Luís Bragança Silva - Initial work
• Pedro Fernandes Costa - Initial work
• João Marques Capinha - Initial work