cs313-2006-t2-problemset4 - CS 313, Winter 2006 - Term 2...

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Unformatted text preview: CS 313, Winter 2006 - Term 2 Assignment 4: Defusing a Binary Bomb Assigned: February 5, Due: Sunday, February 18, 11:59:59 PM 1 Introduction The nefarious Dr. Evil has planted a slew of binary bombs on our machines. A binary bomb is a program that consists of a sequence of phases. Each phase expects you to type a particular string on stdin . If you type the correct string, then the phase is defused and the bomb proceeds to the next phase. Otherwise, the bomb explodes by printing "BOOM!!!" and then terminating. The bomb is defused when every phase has been defused. There are too many bombs for us to deal with, so we are giving each group a bomb to defuse. Your mission, which you have no choice but to accept, is to defuse your bomb before the due date. Good luck, and welcome to the bomb squad! Step 1: Get Your Bomb Each group of students will attempt to defuse their own personalized bomb. Each bomb is a Linux binary executable file that has been compiled from a C program. To obtain your groups bomb, one (and only one) of the group members should point your Web browser to the bomb request daemon at http://yabby.cs.ubc.ca:15213 Fill out the HTML form with the email addresses and names of your team members, and then submit the form by clicking the Submit button. The request daemon will build your bomb and return it immediately to your browser in a tar file called bombk.tar , where k is the unique number of your bomb. You must access the bomb request page from one of the undergrad linux machines. Save the bombk.tar file to a (protected) directory in which you plan to do your work. Then give the command: tar xvf bombk.tar . This will create a directory called ./bombk with the following files: README : Identifies the bomb and its owners....
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This note was uploaded on 10/09/2011 for the course CPSC 344 taught by Professor Karen during the Fall '10 term at The University of British Columbia.

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cs313-2006-t2-problemset4 - CS 313, Winter 2006 - Term 2...

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