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diff --git a/docs/widgets.md b/docs/widgets.md new file mode 100644 index 0000000..5637f2c --- /dev/null +++ b/docs/widgets.md @@ -0,0 +1,205 @@ +The widgets +=========== + +The widgets +----------- + +The widgets are described by the technical recommendations +[widgets] and [widgets-digsig]. + +In summary, **widgets are ZIP files that can be signed and +whose content is described by the file <config.xml>**. + +### The configuration file config.xml + +This is one of the important file of the widget. +It fully describes the widget. + +Here is the example of the config file for the QML application SmartHome. + +```xml +<?xml version="1.0" encoding="UTF-8"?> +<widget xmlns="http://www.w3.org/ns/widgets" id="smarthome" version="0.1"> + <name>SmartHome</name> + <icon src="smarthome.png"/> + <content src="qml/smarthome/smarthome.qml" type="text/vnd.qt.qml"/> + <description>This is the Smarthome QML demo application. It shows some user interfaces for controlling an +automated house. The user interface is completely done with QML.</description> + <author>Qt team</author> + <license>GPL</license> +</widget> +``` + +The most important items are: + +- **\<widget id="......"\>**: gives the id of the widget. It must be unique. + +- **\<widget version="......"\>**: gives the version of the widget + +- **\<icon src="..."\>**: gives a path to the icon of the application + (can be repeated with different sizes) + +- **\<content src="..." type="..."\>**: this indicates the entry point and its type. + The types handled are set through the file /etc/afm/afm-launch.conf + +Further development will add handling of <feature> for requiring and providing +permissions and services. + +### Tools for managing widgets + +This project includes tools for managing widgets. +These tools are: + +- ***wgtpkg-info***: command line tool to display + informations about a widget file. + +- ***wgtpkg-installer***: command line tool to + install a widget file. + +- ***wgtpkg-pack***: command line tool to create + a widget file from a widget directory. + +- ***wgtpkg-sign***: command line tool to add a signature + to a widget directory. + +For all these commands, a tiny help is available with +options **-h** or **--help**. + +There is no tool for unpacking a widget. For doing such operation, +you can use the command **unzip**. + +To list the files of a widget: + +```bash +$ unzip -l WIDGET +``` + +To extract a widget in some directory: + +```bash +$ unzip WIDGET -d DIRECTORY +``` + +*Note that DIRECTORY will be created if needed*. + +### Signing a widget + +To sign a widget, you need a private key and its certificate. + +The tool **wgtpkg-sign** creates or replace a signature file in +the directory of the widget BEFORE its packaging. + +There are two types of signature files: author and distributor. + +Example 1: add an author signature + +```bash +$ wgtpkg-sign -a -k me.key.pem -c me.cert.pem DIRECTORY +``` + +Example 2: add a distributor signature + +```bash +$ wgtpkg-sign -k authority.key.pem -c authority.cert.pem DIRECTORY +``` + +### Packing a widget + +This operation can be done using the command **zip** but +we provide the tool **wgtpkg-pack** that may add checking. + +Example: +```bash +$ wgtpkg-pack DIRECTORY -o file.wgt +``` + +### Getting data about a widget file + +The command **wgtpkg-info** opens a widget file, reads its **config.xml** +file and displays its content in a human readable way. + +Writing a widget +---------------- + +### What kind of application? + +The file **/etc/afm/afm-launch.conf** explain how to launch applications. +(It is the current state that use afm-user-daemon. In a future, it may be +replace by systemd features.) + +Currently the applications that can be run are: + +- binary applications: their type is ***application/x-executable*** + +- HTML5 applications: their type is ***text/html*** + +- QML applications: their type is ***text/vnd.qt.qml*** + +### The steps for writing a widget + +1. make your application + +2. create its configuration file **config.xml** + +3. sign it + +4. pack it + +Fairly easy, no? + +Organization of directory of applications +----------------------------------------- + +### directory where are stored applications + +Applications can be installed in different places: the system itself, extension device. +On a phone application are typically installed on the sd card. + +This translates to: + + - /usr/applications: system wide applications + - /opt/applications: removable applications + +From here those paths are referenced as: "APPDIR". + +The main path for applications is: APPDIR/PKGID/VER. + +Where: + + - APPDIR is as defined above + - PKGID is a directory whose name is the package identifier + - VER is the version of the package MAJOR.MINOR + +This organization has the advantage to allow several versions to leave together. +This is needed for some good reasons (rolling back) and also for less good reasons (user habits). + +### Identity of installed files + +All files are installed as user "afm" and group "afm". +All files have rw(x) for user and r-(x) for group and others. + +This allows every user to read every file. + +### labeling the directories of applications + +The data of a user are in its directory and are labelled by the security-manager +using the labels of the application. + +[meta-intel]: https://github.com/01org/meta-intel-iot-security "A collection of layers providing security technologies" +[widgets]: http://www.w3.org/TR/widgets "Packaged Web Apps" +[widgets-digsig]: http://www.w3.org/TR/widgets-digsig "XML Digital Signatures for Widgets" +[libxml2]: http://xmlsoft.org/html/index.html "libxml2" +[openssl]: https://www.openssl.org "OpenSSL" +[xmlsec]: https://www.aleksey.com/xmlsec "XMLSec" +[json-c]: https://github.com/json-c/json-c "JSON-c" +[d-bus]: http://www.freedesktop.org/wiki/Software/dbus "D-Bus" +[libzip]: http://www.nih.at/libzip "libzip" +[cmake]: https://cmake.org "CMake" +[security-manager]: https://wiki.tizen.org/wiki/Security/Tizen_3.X_Security_Manager "Security-Manager" +[app-manifest]: http://www.w3.org/TR/appmanifest "Web App Manifest" +[tizen-security]: https://wiki.tizen.org/wiki/Security "Tizen security home page" +[tizen-secu-3]: https://wiki.tizen.org/wiki/Security/Tizen_3.X_Overview "Tizen 3 security overview" + + + + |