https://github.com/nikkolasg/cosic
Collective Signing (CoSi) bare bone alternative implementation in C
https://github.com/nikkolasg/cosic
Last synced: about 1 month ago
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Collective Signing (CoSi) bare bone alternative implementation in C
- Host: GitHub
- URL: https://github.com/nikkolasg/cosic
- Owner: nikkolasg
- License: agpl-3.0
- Created: 2016-11-25T23:45:30.000Z (over 8 years ago)
- Default Branch: master
- Last Pushed: 2016-12-28T18:29:23.000Z (over 8 years ago)
- Last Synced: 2025-03-27T01:01:33.954Z (about 2 months ago)
- Language: C
- Homepage:
- Size: 99.6 KB
- Stars: 3
- Watchers: 2
- Forks: 2
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE.md
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README
# cosic
Collective Signing (CoSi) bare bone alternate implementation in C.
See https://github.com/dedis/cothority/app/cosi for more informations.
**WARNING**: This is highly experimental and is not guaranteed to always work. USE AT YOUR OWN RISK.
It's also not finished !
But still, it's fun.
# Why ?
This project has one main goal: to make sure the Golang impl. is truly
compatible with other implementations and the reflect magic + custom protobuf
library does not make it Golang-dependant. So it's NOT a complete implementation
of the CoSi protocol but only for a leaf node of the tree. That avoids the
complexity of implementing the tree overlay which is not clearly defined (and is
also a bit too complex for what it should be).
# How can I use it ?
Well, it's complex for the moment. You need to setup one Golang root node, with
one C leaf node, create the group toml corresponding and then launch the cosi
client to sign something... Yes, I've told you it's not ready yet :) I'm
planning to write a script to test it easily.
# Implementation notes
* Written for >= C99
* compiled with clang 3.9.0
* dependency on libevent >= 2.0.22
* dependency on OpenSSL 1.0.2j
* Supposed to be platform-independent, THOUGH there's still the `random_bytes`
part which is for the moment hard coded for Linux (SYS_getrandom syscall)
# Ok but ... in C !?
Well, first why not ? :)
It's been quite a long time now that I wanted to do a real project in C to
say "I've done it". By real I mean involving crypto + network + "complex"
with differents parts and not just a simple script.
That being said, it's far from being done: it misses some basic "object
oriented" pattern in C, and is not stable, so there's *lot* of stuff to do yet
so it can be called a safe implementation.