CS675 Software Reverse Engineering Sadia Afroz, Omar Badran, Dan Moyer

1. CS675 Software Reverse EngineeringSadia Afroz,Omar Badran, Dan Moyer Lab1 Presentation Feature Rich Java App

2. Java Email Server • Basic SMTP and POP3 email server written in Java • JES User Features • POP3 and SMTP services • Other Features • Supports basic user account configuration • User name • Password • Mail forwarding • Supports basic activity logging • Logs user activity • Logs system errors/exceptions

3. Java Email Server • JES Architecture • SMTP Processor • Mail client connects to send messages • SMTP Sender • Monitors for messages to send. If local, puts msg’s in local users in-box. If remote, passes msg to SMTP Remote Sender • SMTP Remote Sender • Sends non-local msg’s by connecting to other SMTP Processor’s of other mail servers • POP3 Processor • Mail client connects to retrieve messages.

4. Java Email Server • JUnit testing overview • 21 classes • 1 class where main() is defined • 15 functional classes • 1 interface definition • 1 constants definition • 3 exception definitions • Unit test architecture is organized as • Test suite launches the email server • Each test case acts as a client to the email server

5. Java Email Server • JUnit testing overview cont… • Test cases are organized in to two basic categories • Invalid user commands • Normal e-mail operation • Invalid user commands includes • Invalid commands • Invalid command order • Invalid command arguments • Normal e-mail operation includes • Sending local and remote messages • Retrieving the local messages

6. Java Email Server • JUnit testing code coverage • Used Emma for code coverage • JUnit testing results • Achieved 74% code coverage • Achieving near 100% is challenging because • Some defined methods can never be invoked because no other methods calls them • From a user’s point of view, can’t induce the type of exceptions needed to execute exception path