HAXPQ: Reverse Engineering
Closes Oct. 14, 2012
We give you a binary program. You tell us how it works.
In this slightly atypical proggitquiz we are looking for some reverse engineering prowess. For each of the two sets, you will receive a Linux binary. This binary will read a string from STDIN and either accept it or reject it. Your task is to determine what the secret string is.
When you begin each set, you will receive a binary containing the target program. The basic set is a 64-bit little-endian ELF binary. The advanced set is a 32-bit little-endian ELF binary. They are both stripped, dynamically linked and built for Linux 2.6.18 using GCC 4.4.6.
Provide an output file containing a single line with the string that each binary will accept.
If you have any questions, please contact mserrano or sixthgear in ##proggit.
Basic set (50 points)
Advanced set (100 points)
First Post! Award (50 points)
Be the first entry to finish the challenge.
- Write your program according to the problem description
- Download the basic input set. The timer will start.
- Feed the input file to your program and save the output.
- Upload the output file along with your source code. If it is correct, you will receive points. If not you may try again until the timer expires.
- If the timer expires. You may try again, but a new input file will be generated.
- Repeat fot each set.
Note: The input sets use unix line endings (\n) and the verifier expects them as well.
Join channel ##proggit on freenode.
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