ssh-chat

README

ssh-chat

Custom SSH server written in Go. Instead of a shell, you get a chat prompt.

Demo

Join the party:

$ ssh chat.shazow.net

The server's RSA key fingerprint is e5:d5:d1:75:90:38:42:f6:c7:03:d7:d0:56:7d:6a:db. If you see something different, you might be MITM'd.

(Apologies if the server is down, try again shortly.)

Compiling / Developing

You can compile ssh-chat by using make build. The resulting binary is portable and can be run on any system with a similar OS and CPU arch. Go 1.3 or higher is required to compile.

If you're developing on this repo, there is a handy Makefile that should set things up with make run.

Additionally, make debug runs the server with an http pprof server. This allows you to open http://localhost:6060/debug/pprof/ and view profiling data. See net/http/pprof for more information about pprof.

Quick Start

Usage:
  ssh-chat [OPTIONS]

Application Options:
  -v, --verbose    Show verbose logging.
  -i, --identity=  Private key to identify server with. (~/.ssh/id_rsa)
      --bind=      Host and port to listen on. (0.0.0.0:22)
      --admin=     Fingerprint of pubkey to mark as admin.
      --whitelist= Optional file of pubkey fingerprints that are allowed to connect
      --motd=      Message of the Day file (optional)
      --pprof=     enable http server for pprof

Help Options:
  -h, --help       Show this help message

After doing go get github.com/shazow/ssh-chat on this repo, you should be able to run a command like:

$ ssh-chat --verbose --bind ":2022" --identity ~/.ssh/id_dsa

To bind on port 22, you'll need to make sure it's free (move any other ssh daemons to another port) and run ssh-chat as root (or with sudo).

Deploying with Docker

You can run ssh-chat using a Docker image without manually installing go-lang:

$ docker pull alvin/ssh-chat
$ docker run -d -p 0.0.0.0:(your host machine port):2022 --name ssh-chat alvin/ssh-chat

See notes in the header of our Dockerfile for details on building your own image.

License

This project is licensed under the MIT open source license.

Documentation

Overview

TODO: Split this out into its own module, it's kinda neat.

Borrowed from go.crypto circa 2011