Authentication and Password Systems Assignment

In standard Unix, the /etc/passwd file contains user information. It is world-readable. Look it up and learn about it (man 5 passwd). The /etc/shadow file contains user password information. It is only readable with special permissions. Look it up and read about it (man 5 shadow).

Login to the system we will use by typing ssh p53997 @129.244.245.90 in a terminal or by using PuTTY (username is your TUNetID, IP is 129.244.245.90, and port is 53997). Accept the keys and then enter the password provided to you.

From the shell, acquire root privileges (type sudo su and enter your password). Then add a user to the system, call it otheruser_ where is your user account name, and give it a simple password, e.g., pass1, using the adduser utility (man 8 adduser).

Now, respond to the following:

(25 pts) Look at and provide a screenshot of the /etc/passwd and /etc/shadow files that shows the user you added. Find the field in the shadow file containing the users password. Take a screenshot and highlight the field.

(25 pts) What is the salt value?

(25 pts) What is the password hashed with? Crypt? MD5? Something else? How do you know? (This may call for a little open source googling research.)

(25 pts) From within Unix, use the mkpasswd utility (mkpasswd ) to verify the password hash against the known salt. Options for mkpasswd that you may find useful are: --method and S. Show your verification work, i.e. provide a screenshot.

Guidance: General rubric: Grading is based on three fundamental targets: soundness (is the answer correct?), completeness (is the answer responsive and comprehensive?) and writing (is the writing of good quality?).

Read and respond to the questions in their entirety. Some of questions are multi-part.

I already completed 1st question I need rest of the answer and I my answer of 1st question is attached below:

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