nassh: Add wash support.

This adds support for the Web Application Shell app from
This support enabled by default in "Secure Shell (dev)" but not
"Secure Shell".

You can enable or disable it by changing the 'enable-wam' preference from
the background page.

Open the JS console for the background page from chrome:extensions and type

  app_.prefs_.set('enable-wam', true);

This will cause Secure Shell to listen for "WAM" messages via
chrome.runtime.connect from whitelisted apps and extensions.
The whitelist of allowed extension ids is stored in the 'wam-whitelist'
preference.  By default it includes the id of the "load unpacked..."
version of wash, and the wash (dev) available in the chrome web store.

Change-Id: I5d918e54c373e090df69acbe4f0dc4e64302da6d
Reviewed-by: Robert Ginda <>
Commit-Queue: Robert Ginda <>
Tested-by: Robert Ginda <>
7 files changed
tree: e6ece95b1a71cc7660aea23ea6736d1aca5001ab
  1. .gitignore
  4. hterm/
  5. libdot/
  6. nassh/
  7. saltpig/
  8. wam/
  9. wash/


This repository contains the libdot JavaScript library and some web applications that make use of it.

The official copy of this repository is hosted at

There is also a mirror on github at Keep in mind that this mirror may occasionally be behind the official repository.

All changes must go through the Gerrit code review server on Github pull requests cannot be accepted. Please see the document in this directory for the details.

Top level directories

  • libdot/ is a small set of JS libraries initially developed as part of hterm, now available as shared code. It provides a base layer for web applications. The code is intended to work in any modern browser, in either a plain web page or a “privileged” environment such as a Chrome platform application or Firefox extension. In practice, it's only been put to use in Chrome platform applications so far.

  • hterm/ is a JS library that provides a terminal emulator. It is reasonably fast, reasonably correct, and reasonably portable across browsers.

  • nassh/ is a Chrome App (currently a “v1.5” app, soon to become a “v2” or platform app) that combines hterm with a NaCl build of OpenSSH to provide a PuTTY-like app for Chrome users.

  • wash/ is a library for cross-origin virtual filsystems, similar to the Plan 9 filesystem. This directory also contains a simple bash-like shell environment for exploring these filesystems. The code in this directory is a work-in-progress.