Alek Ratzloff
ae288b06df
Usually you want to `git add` when you run gencommit.sh, so that has been added. Also, add ANSI output because I like to see what we're generating while in the terminal. Signed-off-by: Alek Ratzloff <alekratz@gmail.com>
colorhash
A tool for creating distinct art based on input data or hash.
Usage
- Clone the repository
- Run using
python -m colorhash -hfor usage.
No dependencies required, everything is vanilla Python >=3.10.
Example usage
Create art using the default "nibble" art algorithm, printing out to the terminal
python -m colorhash infile.dat
Create art using the OpenSSH "randomart" art algorithm, writing to an SVG file
python -m colorhash infile.dat -y svg -o out.svg -m randomart
Create art using an MD5 hash instead of the default SHA512
python -m colorhash infile.dat -y svg -o out.svg -a md5
Create art in the terminal using the current git commit hash
python -m colorhash "$(git rev-parse HEAD)" -a sha1
Motivation
If you see the picture is different, the key is different.
If the picture looks the same, you still know nothing.
(From OpenSSH sshkey.c fingerprint_randomart() function)
Cryptographic hashes are often visually distinct, however, sometimes they are not. This can become vitally important in matters of security, when you are comparing two key hashes or verifying the checksum of a file from the internet. The goal of this project is to give more fuel for human pattern recognition so that two extremely similar hashes, maliciously crafted or not, have more visual depth to their distinction.
Weaknesses
This is not a perfect solution for hash comparison. Similar hashes may just so happen to choose the same color palette, for example. Additionally, if this is appearing on a webpage, caches may override the most recent version of the file; this has happened with me and Chrome looking at the Github page for this project.
Examples
See the examples directory.
License
Code is licensed under GPLv3.
Since images are representation of a specific hash, all of the SVG files in the examples/ directory are under CC0/public domain.