Attention RMIT University students:

• Please read and understand the Plagiarism notice.

• Please understand that copying this assignment, without properly citing me as your source, is a violation of University policy.

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SHA256 password cracking via a guessing attack, a dictionary attack, and a (trival) brute force attack.

These scripts require a list of accounts in the format of username colon (:) SHA256 hash on each line.

ada:fb1e7ec987523d2cb9e022cec1d6ae7c99dc46edfae4fe51254025fe4bea571f

These scripts require openssl, bash, cat, cut, date, and wc.

git clone https://github.com/aghorler/usap-a1.git

chmod -R 755 usap-a1

This repository contains three main bash scripts. guess.sh, dictionary.sh, and bruteforce.sh.

./guess.sh < resources/accounts.txt will run a guessing attack using a list of commonly used passwords, and the username.

./dictionary.sh < resources/accounts.txt will run a dictionary attack using the a prepackaged hash dictionary.

./bruteforce.sh < resources/accounts.txt will run a (trival) bruteforce attack using the lowercase English alphabet (1 - 4 characters) with a default timeout of 120 seconds.

The script also inclues bruteforce-manual.sh. This script will manually attempt a bruteforce attack (generating a SHA256 hash each iteration), and should not generally be run due to excessive running time.

Any results will be printed to the terminal.

ada:lovelace

Running any of the scripts with the --debug flag will print hash mismatches along with matches.

./bruteforce.sh --debug < resources/accounts.txt

All attempts of the attack will be printed to the terminal.

DEBUG (MISMATCH): john:d (18ac3e7343f016890c510e93f935261169d9e3f565436429830faf0934f4f8e4)

DEBUG (MATCH): john:e (3f79bb7b435b05321651daefd374cdc681dc06faa65e374e38337b88ca046dea)

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Plagiarism includes the act of assisting or allowing another person to plagiarise or to copy my/our work.