Expert answer:hep in operating system security

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Answer & Explanation:Hi, I need a help and please read the attachment carefully. Write a C program to crack a password in the Linux.docx
write_a_c_program_to_crack_a_password_in_the_linux.docx

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Write a C program to crack a password in the Linux /etc/shadow file.
Requirements :
Write a program using the programming language of your choice (C is the best bet because the mcrypt
function is native to C) to implement a password cracker for Linux. I am only requiring a rainbow table
implementation and you can add a dictionary or brute force attack if you want a more challenging
programming assignment. The program should take the shadow file and a user name as arguments and
recover the specified user’s password. The program quits with a warning if the user does not exist or
does not have a password. On completion, the program should display a recovered password. If the
password is not in the dictionary, the program should state “password not in dictionary” upon
completion.
Deliverables:
Submit the code along with a readme.txt file that documents the program and explains step-by-step
how to run it.
Resources: C Tutorials
http://www.cprogramming.com/ http://www.learnconline.com/
mcrypt function
http://linux.die.net/man/3/mcrypt
…
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