duprule

What

Remove duplicate Hashcat rules.

How does it works ?

TL;DR: Each rule change is mapped, and a unique id is generated for each rule with functions count.

The mechanism is like this:

• A blank map is created with N ( from 1 to 36 ) slots.
• Each rule change will be applied to the map. Example rule: 'u', will change all characters cases from '?' ( unknown ) to 'u' ( upper case ). 'sab', will add {'a' -> 'b'} to the map. And same logic apply for the other rules.
• An id is generated from the map.
• The ids are compared to detect duplicate rules.
• The rule with the least functions count will be selected.

Which rules are supported ?

All rules on this page are supported except:

- Memory rules: X, 4, 6, M
- Reject plains rules
- L, R, +, -
- E, e

Usage

Remove duplicate Hashcat rules.

Usage:
    duprule [options] < input


Reads input from STDIN and prints to STDOUT.

Options:
    -o, --output      optional	 file to write duplicate rules to
    -v, --version     optional	 print version info
    -h, --help        optional	 print this help message
    -s, --supported   optional	 list all supported rules

Examples:

duprule < rockyou.rule > rockyou.rule.uniq
duprule -o duplicates.txt < rockyou.rule > rockyou.rule.uniq

Installation

duprule is written in Rust.

# run dev after clonning:
cargo run < input.rule
cargo run < input.rule -- -o duplicates.txt