Python SHA1 cracker for GSU's CSC 4980 Blockchain & Applications Course.

Code is written by Kevin Aiken, the repo author.

This repo includes a dictionary, a basic cracking application, and the assignment handout.

Assuming you have a Python 2.7 environment configured, run python SHA1_Cracker_Basic.py yourhashhere non-combination unsalted from the terminal for a basic unsalted hash that is not a combination of dictionary terms.

Program arguments following the following format: hash non-combination/combination unsalted/salted salt

Example to brute force a hash that is a combination of two words from the dictionary: python SHA1_Cracker_Basic.py 34302959e138917ce9339c0b30ec50e650ce6b40 combination unsalted

Example for a salted password consisting of one word from the dictionary: python SHA1_Cracker_Basic.py ece4bb07f2580ed8b39aa52b7f7f918e43033ea1 non-combination salted f0744d60dd500c92c0d37c16174cc58d3c4bdd8e

These are the hashes assigned to be cracked and their cleartext.

• A) Easy hash

  • Hash: b7a875fc1ea228b9061041b7cec4bd3c52ab3ce3
  • Clear text: letmein
  • Time to crack: .000054 seconds

• B) Medium difficulty hashw

  • Hash: 801cdea58224c921c21fd2b183ff28ffa910ce31
  • Clear text: vjhtrhsvdctcegth
  • Time to crack: 0.655790

• C) Hash with salt

  • Hash: ece4bb07f2580ed8b39aa52b7f7f918e43033ea1
  • Salt: f0744d60dd500c92c0d37c16174cc58d3c4bdd8e
  • Clear text: harib
  • Time to crack: 0.376532
  • Salt's clear text: slayer

• D) Combination hash consisting of two dictionary words with a space between

  • Note: Cracked using hashcat on a GPU in 4 minutes, as my calculated estimated time was too long for me to run on my system. However the program does work, as it can solve passwords closer to the top of the list.
  • Hash: 34302959e138917ce9339c0b30ec50e650ce6b40
  • Clear text: Alligator1 YpeKawOqO
  • Estimated time to crack: 8.3 days