gpgme.js, as contained in this directory, is a javascript library for direct use
of gnupg in browsers, with the help of nativeMessaging.

Prerequisites:
--------------
gpgme.js will make use of the application gpgme-json, which is distributed with
gpgme. Gpgme-json needs to be installed; it will further need to accept the
browser extension in the manifest file.

Building gpgme.js
-----------------
gpgme.js uses webpack, and thus depends on nodejs for building. All
dependencies will be installed (in a local subdirectory) with the command
`npm install`.

To create a current version of the package, the command is
`npx webpack --config webpack.conf.js`.
If you want a more debuggable (i.e. not minified) build, just change the mode
in webpack.conf.js.

Demo and Test WebExtension:
---------------------------

The Demo Extension shows simple examples of the usage of gpgme.js.

The BrowsertestExtension runs more intensive tests (using the mocha and chai
frameworks). Tests from BrowserTestExtension/tests will be run against the
gpgmejs.bundle.js itself. They aim to test the outward facing functionality
and API.

Unittests as defined in ./unittests.js will be bundled in
gpgmejs_unittests.bundle.js, and test the separate components of gpgme.js,
which mostly are not exported.

The file `build_extension.sh` may serve as a pointer on how to build and
assemble these two Extensions and their dependencies. It can directly
be used in most linux systems.

The resulting folders can just be included in the extensions tab of the browser
in questions (extension debug mode needs to be active). For chrome, selecting
the folder is sufficient, for firefox, the manifest.json needs to be selected.
Please note that it is just for demonstration/debug purposes!

For the Extensions to successfully communicate with gpgme-json, a manifest file
is needed.

- `~/.config/chromium/NativeMessagingHosts/gpgmejson.json`

In the browsers' nativeMessaging configuration folder a file 'gpgmejs.json'
is needed, with the following content:

- For Chrome/Chromium:
  ```
  {
    "name": "gpgmejson",
    "description": "This is a test application for gpgme.js",
    "path": "/usr/bin/gpgme-json",
    "type": "stdio",
    "allowed_origins": ["chrome-extension://ExtensionIdentifier/"]
  }
  ```
  The usual path for Linux is similar to:
  `~/.config/chromium/NativeMessagingHosts/gpgmejson.json` for
  For Windows, the path to the manifest needs to be placed in
  `HKEY_LOCAL_MACHINE\SOFTWARE\Google\Chrome\NativeMessagingHosts\gpgmejson`

  - For firefox:
  ```
  {
    "name": "gpgmejson",
    "description": "This is a test application for gpgme.js",
    "path": "/usr/bin/gpgme-json",
    "type": "stdio",
    "allowed_extensions": ["ExtensionIdentifier@temporary-addon"]
  }
  ```

  The ExtensionIdentifier can be seen as Extension ID on the about:addons page
  if addon-debugging is active. In firefox, the temporary addon is removed once
  firefox exits, and the identifier will need to be changed more often.

  The manifest for linux is usually placed at:
    `~/.mozilla/native-messaging-hosts/gpgmejson.json`

Documentation
-------------

The documentation can be built by jsdoc. It currently uses the command
`./node_modules/.bin/jsdoc -c jsdoc.conf`.