Programming language: Go
License: MIT License

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Make SSH apps, just like that! 💫

SSH is an excellent platform to build remotely accessible applications on. It offers secure communication without the hassle of HTTPS certificates, it has user identification with SSH keys and it's accessible from anywhere with a terminal. Powerful protocols like Git work over SSH and you can even render TUIs directly over an SSH connection.

Wish is an SSH server with sensible defaults and a collection of middleware that makes building SSH apps easy. Wish is built on gliderlabs/ssh and should be easy to integrate into any existing projects.

What are SSH Apps?

Usually, when we think about SSH, we think about remote shell access into servers, most commonly through openssh-server.

That's a perfectly valid and probably the most common use of SSH, but it can do so much more than that. Just like HTTP, SMTP, FTP and others, SSH is a protocol! It is a cryptographic network protocol for operating network services securely over an unsecured network. 1

That means, among other things, that we can write custom SSH servers, without touching openssh-server, so we can securely do more things than just providing a shell.

Wish is a library that helps writing these kind of apps using Go.


Wish middlewares are analogous to those in several HTTP frameworks. They are essentially SSH handlers that you can use to do specific tasks, and then call the next middleware.

Notice that middlewares are composed from first to last, which means the last one is executed first.

Bubble Tea

The [bubbletea](bubbletea) middleware makes it easy to serve any Bubble Tea application over SSH. Each SSH session will get their own tea.Program with the SSH pty input and output connected. Client window dimension and resize messages are also natively handled by the tea.Program.

You can see a demo of the Wish middleware in action at: ssh git.charm.sh


The [git](git) middleware adds git server functionality to any ssh server. It supports repo creation on initial push and custom public key based auth.

This middleware requires that git is installed on the server.


The [logging](logging) middleware provides basic connection logging. Connects are logged with the remote address, invoked command, TERM setting, window dimensions and if the auth was public key based. Disconnect will log the remote address and connection duration.

Access Control

Not all applications will support general SSH connections. To restrict access to supported methods, you can use the [activeterm](activeterm) middleware to only allow connections with active terminals connected and the [accesscontrol](accesscontrol) middleware that lets you specify allowed commands.

Default Server

Wish includes the ability to easily create an always authenticating default SSH server with automatic server key generation.


There are examples for a standalone [Bubble Tea application](examples/bubbletea) and [Git server](examples/git) in the [examples](examples) folder.

Apps Built With Wish

Pro Tip

When building various Wish applications locally you can add the following to your ~/.ssh/config to avoid having to clear out localhost entries in your ~/.ssh/known_hosts file:

Host localhost
    UserKnownHostsFile /dev/null



Part of Charm.

Charm热爱开源 • Charm loves open source

*Note that all licence references and agreements mentioned in the Wish README section above are relevant to that project's source code only.