NETS1035

Lab 1 RNG, Symmetric Encryption, Hashes

Grading

The second task contains additional instructions about what you are to submit for this lab.

Decrypting a message

When doing this task, capture screenshots showing only the commands you used that worked and their results. Your screenshots should include your shell prompts, so I can see what machine you did your work on. Before starting task 2, put your screenshots into a PDF to include when you submit your work for this lab on blackboard.

I recommend that you keep notes and perhaps screenshots of your work on task 2 as well, for future reference but it is not required for this lab.

1. Download and run the lab setup script using sudo - screenshot!

curl https://zonzorp.github.io/NETS1035/Labs/lab1-setup.sh>lab1-setup.sh
sudo bash lab1-setup.sh

1. Do not proceed unless you saw the “VM Pwned” message - screenshot!
2. Find the file containing the encrypted hash - it is named encryptedHash and the linux find command can find it for you easily - screenshot!
3. Decrypt it using your student number as a password for the ccrypt program - screenshot!
4. Find the file on your lab VM that matches the hash digest - screenshot!
5. Decrypt that file using aespipe with password ImSoSmart,ImSoSmart,SMRT! to get the blowfish encrypted instructions for your next task - screenshot!
6. Decrypt your actual instructions for the second task by using openssl to run the blowfish cipher in counter feedback mode with password nets1035 on the output from your aespipe decryption in the previous step - screenshot!

Note that it it is fine to include more than one command in a screenshot, just make sure it isn’t so crowded and tiny that I cannot read it. I will not try to mark anything I cannot read.