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part of the crypto commons technology family
by Wolf McNally and Christopher Allen
lifehash is a command line tool written in C++ that generates LifeHash images as PNG files.
lifehash is currently under active development and in the late alpha testing phase. It should not be used for production tasks until it has had further testing and auditing.
git clone https://github.com/BlockchainCommons/bc-lifehash-cli
cd bc-lifehash-cli/
./build.sh
sudo make installNote: if on Linux you'll have to install zsh beforehand:
$ sudo apt-get install zshPrint the help:
lifehash --help
Usage: src/lifehash [OPTION...] [INPUT]
-v VERSION [version1|version2|detailed|fiducial|grayscaleFiducial] (default: version2)
-m MODULE_SIZE Size of each module ("pixel") (default: 1)
-p OUTPUT_PATH (default: current directory)
-h --help Print this message.
* The output PNG file will have the same name as the INPUT string.
* If no INPUT string is provided, a random one will be generated of the form "XXX-XXX" where X is a random letter.Generate a version2, 32x32 pixel LifeHash in the current directory from the string "0":
lifehash 0
ls
0.pngGenerate a detailed, 64x64 pixel LifeHash in the current directory with a randomly generated name of the form "XXX-XXX" where X is a random letter.
lifehash -v detailed
ls
OKS-OID.pngGenerate the same LifeHash as above, but use a module size of 8, resulting in a 512x512 image:
lifehash -v detailed -m 8 OKS-OID
ls
OKS-OID.pngUse the included make-examples.sh script to generate 30 fiducial LifeHashes with a module size of 8 in the directory ./output:
./make-examples.sh fiducial 30 8
ls ./output
BUE-WZC.png DSP-IIK.png KHO-GQH.png LOV-CZL.png NFD-VWY.png TGE-JLS.png YBN-ZOU.png ZTW-ZWN.png
BZV-HHP.png EDB-HDG.png KIB-OFT.png LUV-VRB.png NNY-TRP.png THL-IRO.png ZJB-ZAS.png ZVS-BEH.png
CAJ-TQC.png ILF-JLC.png KPS-VYZ.png MMT-HRP.png RVG-VZO.png URG-VKN.png ZQS-QHK.png
DEZ-ZZS.png JBS-XMX.png KTG-XAW.png MOJ-SGW.png SSV-ZBF.png XFF-APN.png ZQZ-TEX.pngUse ImageMagick montage to create a montage of the images you just generated:
montage -label %t output/* montage.png
open montage.jpgUnless otherwise noted (either in this /README.md or in the file's header comments) the contents of this repository are Copyright © 2020 by Blockchain Commons, LLC, and are licensed under the spdx:BSD-2-Clause Plus Patent License.
In most cases, the authors, copyright, and license for each file reside in header comments in the source code. When it does not, we will attribute it accurately in a table in this section.
To build lifehash you'll need to use the following tools:
- autotools - Gnu Build System from Free Software Foundation (intro).
The following external libraries are used with lifehash:
- libpng - Portable Network Graphics library (dbe3e0c43)
- zlib - compression library (v1.2.11 - cacf7f1)
This lifehash project is either derived from or was inspired by:
- LifeHash — A beautiful method of hash visualization based on Conway’s Game of Life by Wolf McNally
lifehash is a project of Blockchain Commons. We are proudly a "not-for-profit" social benefit corporation committed to open source & open development. Our work is funded entirely by donations and collaborative partnerships with people like you. Every contribution will be spent on building open tools, technologies, and techniques that sustain and advance blockchain and internet security infrastructure and promote an open web.
To financially support further development of lifehash and other projects, please consider becoming a Patron of Blockchain Commons through ongoing monthly patronage as a GitHub Sponsor. You can also support Blockchain Commons with bitcoins at our BTCPay Server.
Thanks to our project sponsors for their support of lifehash:
$sponsor-logo-with-link
$sponsor-description
We encourage public contributions through issues and pull requests! Please review CONTRIBUTING.md for details on our development process. All contributions to this repository require a GPG signed Contributor License Agreement.
The best place to talk about Blockchain Commons and its projects is in our GitHub Discussions areas.
Gordian System Discussions. For users and developers of the Gordian system, including the Gordian Server, Bitcoin Standup technology, QuickConnect, and the Gordian Wallet. If you want to talk about our linked full-node and wallet technology, suggest new additions to our Bitcoin Standup standards, or discuss the implementation our standalone wallet, the Discussions area of the main Gordian repo is the place.
Wallet Standard Discussions. For standards and open-source developers who want to talk about wallet standards, please use the Discussions area of the Airgapped Signing repo. This is where you can talk about projects like our LetheKit and command line tools such as seedtool, both of which are intended to testbed wallet technologies, plus the libraries that we've built to support your own deployment of wallet technology such as bc-bip39, bc-slip39, bc-shamir, Sharded Secret Key Reconstruction, bc-ur, and the bc-crypto-base. If it's a wallet-focused technology or a more general discussion of wallet standards,discuss it here.
Blockchain Commons Discussions. For developers, interns, and patrons of Blockchain Commons, please use the discussions area of the Community repo to talk about general Blockchain Commons issues, the intern program, or topics other than the Gordian System or the wallet standards, each of which have their own discussion areas.
As an open-source, open-development community, Blockchain Commons does not have the resources to provide direct support of our projects. Please consider the discussions area as a locale where you might get answers to questions. Alternatively, please use this repository's issues feature. Unfortunately, we can not make any promises on response time.
If your company requires support to use our projects, please feel free to contact us directly about options. We may be able to offer you a contract for support from one of our contributors, or we might be able to point you to another entity who can offer the contractual support that you need.
The following people directly contributed to this repository. You can add your name here by getting involved. The first step is learning how to contribute from our CONTRIBUTING.md documentation.
| Name | Role | Github | GPG Fingerprint | |
|---|---|---|---|---|
| Christopher Allen | Principal Architect | @ChristopherA | <ChristopherA@LifeWithAlacrity.com> | FDFE 14A5 4ECB 30FC 5D22 74EF F8D3 6C91 3574 05ED |
| Wolf McNally | Project Lead | @WolfMcNally | <Wolf@WolfMcNally.com> | 9436 52EE 3844 1760 C3DC 3536 4B6C 2FCF 8947 80AE |
We want to keep all of our software safe for everyone. If you have discovered a security vulnerability, we appreciate your help in disclosing it to us in a responsible manner. We are unfortunately not able to offer bug bounties at this time.
We do ask that you offer us good faith and use best efforts not to leak information or harm any user, their data, or our developer community. Please give us a reasonable amount of time to fix the issue before you publish it. Do not defraud our users or us in the process of discovery. We promise not to bring legal action against researchers who point out a problem provided they do their best to follow the these guidelines.
Please report suspected security vulnerabilities in private via email to ChristopherA@BlockchainCommons.com (do not use this email for support). Please do NOT create publicly viewable issues for suspected security vulnerabilities.
The following keys may be used to communicate sensitive information to developers:
| Name | Fingerprint |
|---|---|
| Christopher Allen | FDFE 14A5 4ECB 30FC 5D22 74EF F8D3 6C91 3574 05ED |
You can import a key by running the following command with that individual’s fingerprint: gpg --recv-keys "<fingerprint>" Ensure that you put quotes around fingerprints that contain spaces.