sshwifty

README

Sshwifty Web SSH & Telnet Client

Sshwifty is a SSH and Telnet client made for the Web, allow you to access SSH and Telnet services right from your web browser.

(The glass glare effect above is only included in the Executive Golden Premium Plus+ Platinum Ultimate AD-free version, which can be obtained after joining the cult. Though, science has proven that the normal AD-free version is sufficient for most people. In fact, the majority of people surveyed are annoyed by the glare, while the rest showed a little interest)

Install

Prebuilt Executables

We offer prebuilt ready-to-run programs (called executables) for a handful of popular platforms in the Releases section. You might find one built for your platform there.

Please aware that these executables are generated by an unsupervised automatic procedure, and we (as the authors and contributors) cannot guarantee to test them. If you've encountered unusual failure caused by those executables, feel free to open an issue, so we can take a look.

Docker Image (recommended)

Deploying Sshwifty as a Docker container allows you to isolate Sshwifty from the rest of the system for better system organization and security.

We also offer prebuilt Docker Images for few selected platforms generated in the same way as we generate the prebuilt Executables described above. To deploy one on your Docker host, run:

$ docker run --detach \
  --restart always \
  --publish 8182:8182 \
  --name sshwifty \
  niruix/sshwifty:latest

(Note: it's niruix/sshwifty with an x)

This will open port 8182 on the Docker host to accept traffic from all clients (including remote ones), and serve them with the Sshwifty instance just created.

To expose Sshwifty locally only to the Docker host, change the line --publish 8182:8182 from the command above to --publish 127.0.0.1:8182:8182. This is useful for scenarios where you want to force remote clients to access Sshwifty only though a reverse proxy, or just simply want to prevent remote access.

When TLS is desired and you don't want to setup Docker Volumes, you can use SSHWIFTY_DOCKER_TLSCERT and SSHWIFTY_DOCKER_TLSCERTKEY environment variables to import certificate files to the container and automatically apply them:

$ openssl req \
  -newkey rsa:4096 -nodes -keyout domain.key -x509 -days 90 -out domain.crt
$ docker run --detach \
  --restart always \
  --publish 8182:8182 \
  --env SSHWIFTY_DOCKER_TLSCERT="$(cat domain.crt)" \
  --env SSHWIFTY_DOCKER_TLSCERTKEY="$(cat domain.key)" \
  --name sshwifty \
  niruix/sshwifty:latest

The domain.crt and domain.key in the command above is the location of valid X509 certificate and key file.

Though, in most situations where a reverse proxy and/or load balancer (for example, Nginx or Traefik) is used in front of Sshwifty instances, TLS should usually terminate on the proxy, not on the individual Sshwifty instances.

Compile from source code (recommended for developers)

The following tools are required in order to compile the software from source code:

• git to download the source code
• node and npm to build front-end application
• go to build back-end application

To start the build process, run:

$ git clone https://github.com/nirui/sshwifty
$ cd sshwifty
$ npm install
$ npm run build

When done, you can find the newly generated sshwifty binary under current working directory.

Notice: Dockerfile contains the entire build procedure of this software. Please refer to it when you encounter any compile/build related issue.

Third-party Homebrew Formulae from @unbeatable-101

If you're a macOS user, @unbeatable-101 is kindly hosting a Homebrew Formulae that allows you to install his custom Sshwifty builds for macOS via homebrew. You can hop over to unbeatable-101/homebrew-sshwifty for detailed instruction and contribute to his work.

Please note that, due to the third-party nature of the work, the author(s) of Sshwifty are unable to provide any audit, warranty or support for it. If you have any question or request regarding to the Formulae, please contact @unbeatable-101 directly through appreciate channels.

Thank @unbeatable-101 for his work.

Configuration

Sshwifty can be configured through either file or environment variables. By default, the configuration loader will try to load file from default paths first, when all failed, environment variables will be used.

You can also specify your own configuration file with SSHWIFTY_CONFIG environment variable. For example:

$ SSHWIFTY_CONFIG=./sshwifty.conf.json ./sshwifty

This tells Sshwifty to only load configuration from file ./sshwifty.conf.json.

Configuration file option and descriptions

Here is all the options of the configuration file:

{
  // HTTP Host. Keep it empty to accept request from all hosts, otherwise, only
  // specified host is allowed to access
  "HostName": "localhost",

  // Web interface access password. Set to empty to allow public access to the
  // web interface (By pass the Authenticate page)
  "SharedKey": "WEB_ACCESS_PASSWORD",

  // Remote dial timeout. This limits how long of time the backend can spend
  // to connect to a remote host. The max timeout will be determined by
  // server configuration (ReadTimeout).
  // (In Seconds)
  "DialTimeout": 10,

  // Socks5 proxy. When set, Sshwifty backend will try to connect remote through
  // the given proxy
  "Socks5": "localhost:1080",

  // Username of the Socks5 server. Please set when needed
  "Socks5User": "",

  // Password of the Socks5 server. Please set when needed
  "Socks5Password": "",

  // Sshwifty HTTP server, you can set multiple ones to serve on different
  // ports
  "Servers": [
    {
      // Which local network interface this server will be listening
      "ListenInterface": "0.0.0.0",

      // Which local network port this server will be listening
      "ListenPort": 8182,

      // Timeout of initial request. HTTP handshake must be finished within
      // this time
      // (In Seconds)
      "InitialTimeout": 3,

      // How long do the connection can stay in idle before the backend server
      // disconnects the client
      // (In Seconds)
      "ReadTimeout": 60,

      // How long the server will wait until the client connection is ready to
      // recieve new data. If this timeout is exceed, the connection will be
      // closed.
      // (In Seconds)
      "WriteTimeout": 60,

      // The interval between internal echo requests
      // (In Seconds)
      "HeartbeatTimeout": 20,

      // Forced delay between each request
      // (In Milliseconds)
      "ReadDelay": 10,

      // Forced delay between each write
      // (In Milliseconds)
      "WriteDelay": 10,

      // Path to TLS certificate file. Set empty to use HTTP
      "TLSCertificateFile": "",

      // Path to TLS certificate key file. Set empty to use HTTP
      "TLSCertificateKeyFile": ""
      
      // Display a short text message on the Home page. Link is supported 
      // through `[Title text](https://link.example.com)` format
      "ServerMessage": ""
    },
    {
      "ListenInterface": "0.0.0.0",
      "ListenPort": 8182,
      "InitialTimeout": 3,
      .....
    }
  ],

  // Remote Presets, the operater can define few presets for user so the user
  // won't have to manually fill-in all the form fields
  //
  // Presets will be displayed in the "Known remotes" tab on the Connector
  // window
  //
  // Notice: You can use the same JSON value for `SSHWIFTY_PRESETS` if you are
  //         configuring your Sshwifty through enviroment variables.
  //
  // Warning: Presets Data will be sent to user client WITHOUT any protection.
  //          DO NOT add any secret information into Preset.
  //
  "Presets": [
    {
      // Title of the preset
      "Title": "SDF.org Unix Shell",

      // Preset Types, i.e. Telnet, and SSH
      "Type": "SSH",

      // Target address and port
      "Host": "sdf.org:22",

      // Form fields and values, you have to manually validate the correctness
      // of the field value
      //
      // Defining a Meta field will prevent user from changing it on their
      // Connector Wizard. If you want to allow users to use their own settings,
      // leave the field unsetted
      //
      // Values in Meta are scheme enabled, and supports following scheme
      // prefixes:
      // - "literal://": Text literal (Default)
      //                 Example: literal://Data value
      //                          (The final value will be "Data value")
      //                 Example: literal://file:///tmp/afile
      //                          (The final value will be "file:///tmp/afile")
      // - "file://": Load Meta value from given file.
      //              Example: file:///home/user/.ssh/private_key
      //                       (The file path is /home/user/.ssh/private_key)
      // - "environment://": Load Meta value from an Environment Variable.
      //                    Example: environment://PRIVATE_KEY_DATA
      //                    (The name of the target environment variable is
      //                    PRIVATE_KEY_DATA)
      //
      // All data in Meta is loaded during start up, and will not be updated
      // even the source already been modified.
      //
      "Meta": {
        // Data for predefined User field
        "User": "pre-defined-username",

        // Data for predefined Encoding field. Valid data is those displayed on
        // the page
        "Encoding": "pre-defined-encoding",

        // Data for predefined Password field
        "Password": "pre-defined-password",

        // Data for predefined Private Key field, should contains the content
        // of a Key file
        "Private Key": "file:///home/user/.ssh/private_key",

        // Data for predefined Authentication field. Valid values is what
        // displayed on the page (Password, Private Key, None)
        "Authentication": "Password",

        // Data for server public key fingerprint. You can acquire the value of
        // the fingerprint by manually connect to a new SSH host with Sshwifty,
        // the fingerprint will be displayed on the Fingerprint comformation
        // page.
        "Fingerprint": "SHA256:bgO...."
      }
    },
    {
      "Title": "Endpoint Telnet",
      "Type": "Telnet",
      "Host": "endpoint.vaguly.com:23",
      "Meta": {
        // Data for predefined Encoding field. Valid data is those displayed on
        // the page
        "Encoding": "utf-8"
        ....
      }
    },
    ....
  ],

  // Allow the Preset Remotes only, and refuse to connect to any other remote
  // host
  //
  // NOTICE: You can only configure OnlyAllowPresetRemotes through a config
  //         file. This option is not supported when you are configuring with
  //         environment variables
  "OnlyAllowPresetRemotes": false
}

sshwifty.conf.example.json is an example of a valid configuration file, you can make your own customization base on it.

Environment variables

Valid environment variables are:

SSHWIFTY_HOSTNAME
SSHWIFTY_SHAREDKEY
SSHWIFTY_DIALTIMEOUT
SSHWIFTY_SOCKS5
SSHWIFTY_SOCKS5_USER
SSHWIFTY_SOCKS5_PASSWORD
SSHWIFTY_LISTENPORT
SSHWIFTY_INITIALTIMEOUT
SSHWIFTY_READTIMEOUT
SSHWIFTY_WRITETIMEOUT
SSHWIFTY_HEARTBEATTIMEOUT
SSHWIFTY_READDELAY
SSHWIFTY_WRITEELAY
SSHWIFTY_LISTENINTERFACE
SSHWIFTY_TLSCERTIFICATEFILE
SSHWIFTY_TLSCERTIFICATEKEYFILE
SSHWIFTY_SERVERMESSAGE
SSHWIFTY_PRESETS
SSHWIFTY_ONLYALLOWPRESETREMOTES

These options are correspond to their counterparts in the configuration file.

Notice: When you're using environment variables to configure Sshwifty, only one Sshwifty HTTP server is then allowed. There is no way to setup multiple servers under this method of configuration. If you need to serve on multiple ports, use the configuration file instead.

Be aware: An invalid value inside following environment variables will cause the value to be silently reset to default during configuration parsing phase without warning:

SSHWIFTY_DIALTIMEOUT
SSHWIFTY_INITIALTIMEOUT
SSHWIFTY_READTIMEOUT
SSHWIFTY_WRITETIMEOUT
SSHWIFTY_HEARTBEATTIMEOUT
SSHWIFTY_READDELAY
SSHWIFTY_WRITEELAY

Please verify the value of these options before start the instance.

FAQ

Why the software says "The datetime difference ... is beyond tolerance"?

Currently, Sshwifty implemented a layer of obscuration in it's wire protocol. The protocol utilize the common time of both endpoint to generate cryptographic keys to be used to encrypt and decrypt traffic between the client and the server. Thus both end must have accurate datetime relative to the time of the world.

Please make sure the datetime on both the client and the server are correct by resync them with a NTP server, and then simply reload the page. The problem should be gone afterwards.

Why I got error "TypeError: Cannot read property 'importKey' of undefined"

Sshwifty's wire protocol requires few cryptographic features which is only available with WebCrypt API. Some old web browsers maybe not support WebCrypt API, or the newer ones may disable WebCrypt API when the web page is not accessed under Secure contexts, which led to the error message.

Usually, setup HTTPS either on your reverse proxy or on Sshwifty itself should allow you to access Sshwifty via HTTPS (a https:// URL), and thus solving this issue. Also, enabling HTTPS is mostly a good idea anyways, even in a LAN.

Can I serve Sshwifty under a subpath such as https://my.domain/ssh?

The short story is No. Sshwifty was designed based on an assumption that it will run as the only service under a given hostname, allowing web browsers to better enforce their data isolation rules. This is very important because Sshwifty saves user data locally, right on the web browser.

However, if you really want to put Sshwifty into a subpath, you can do so by taking advantage of the fact that Sshwifty backend interface and assets are always located under an URL prefix /sshwifty. You can thus redirect or proxy those requests to their new location.

Keep in mind, doing so is really hacky, and it's not recommended by the author thus no support will be provided if you decide to do so.

Why I can't add my own key combinations to the Console tool bar?

The pre-defined key combinations are there mainly to make mobile operation possible as well as to resolve some hotkey conflicts. However, if efficiency is your first goal, please consider to use a software/on screen keyboard which is specially designed for terminal.

And if that's not enough, connect a physical keyboard through Bluetooth or OTA could be a better alternative. This way you can type as if you're using a computer console.

Credits

• Thanks to Ryan Fortner for the grammar fix
• Thanks to Tweak for the grammar fix
• Thanks to CJendantix for the grammar and typo fix
• Thanks to ZStrikeGit for the grammar and formatting fixes

License

Code of this project is licensed under AGPL, see LICENSE.md for detail.

Third-party components used by this project are licensed under their respective licenses. See DEPENDENCIES.md to learn more about dependencies used by this project and read their copyright statements.

Contribute

This is a hobbyist project, meaning I don't have that much time to put into it, sorry.

Upon release (Which is then you're able to read this file), this project will enter the maintaining state, which includes doing some bug fixes and security updates. Adding new features however, is not a part of the state.

Please do not send any pull requests. If you need new feature, fork it, add it by yourself, then maintain it like one of your own project. It's not that hard with some Github features.

(Notice: Typos, grammar errors or invalid use of language in the source code and documentation should be categorized as a bug, please report them if you find any. Thank you!)

Appreciate your help, enjoy!