How To Access Another App Privilege In Tizen

This topic describes how to add Tizen privileges and PPAPI permissions to a Native Client project in the Tizen Studio, and lists the Tizen privileges corresponding to PPAPI permissions.

Important
Due to NaCl deprecation by the Chromium project, Tizen TV will continue its support for NaCl only until 2021-year products. Meanwhile, Tizen TV will start focusing on high-performance, cross-browser WebAssembly from 2020-year products.

Some Samsung Product and Tizen API modules can perform security-sensitive operations which, if not used correctly, can harm user privacy and system stability. Applications that use these sensitive APIs must declare the required privileges in the "config.xml" file. Privileges are categorized into public, partner, and platform levels:

The public level is the minimum privilege level, which means that any application developed using the Tizen Studio can use these privileges.
The partner level privileges require at least a partner-signed certificate, which is granted to developers who have a business relationship with the vendor.
The platform level is the highest privilege level, and an application that needs these privileges requires at least a platform-signed certificate, which is granted to vendor developers.

For more information about Tizen privileges, see Security and API Privileges and Tizen Privilege.

In Tizen applications, Native Client (NaCl) modules using security-sensitive PPAPI interfaces must also declare permissions in its ".nmf" manifest file. Some PPAPI permissions correspond to Tizen privileges, since they grant access to the same resources. Consequently, both the PPAPI permissions and the corresponding Tizen privileges must be declared.

Adding Privileges

When you build a NaCl project in the Tizen Studio, the "config.xml" and "<projectname>.nmf" configuration files are generated automatically. The Tizen Studio detects and adds privileges based on the included interface headers in the source code. It maps the privileges to PPAPI permissions, and includes them in the generated "<projectname>.nmf" configuration file.

However, privileges required by header files outside the project must be added separately. When you add Tizen privileges to the project in the Tizen Studio, the equivalent PPAPI permissions are automatically added to the "<projectname>.nmf" configuration file.

Important
Be careful when modifying the "config.xml" and "<projectname>.nmf" files directly.

To add Tizen privileges to the project:

In the "Project Explorer" view, right-click the project name, and select "Properties".
In the side menu, select "Tizen Studio > Tizen privileges".
Select the desired privileges from the list, and click "Apply".
To close the dialog, click "Apply and Close".

Figure 1. Adding Tizen privileges

The project automatically rebuilds.
To verify that the PPAPI permissions were added, open the "CurrentBin/<projectname>.nmf" file.
For example, if you added the "http://tizen.org/privilege/filesystem.write" privilege, the output ".nmf" file contains the following PPAPI permissions:
```
                                  "permissions" : [ "PPB_FileIO", "PPB_FileIO_Private", "PPB_FileRef", "PPB_FileSystem", "PPB_RemovableStorage_Dev" ],                              
```

Tizen Privileges Corresponding to PPAPI Permissions

The following table maps PPAPI permissions to the Tizen privileges that must be added in the Tizen Studio. The PPAPI permission name is the same as the interface using it. Interfaces that do not require permissions are not listed.

Note
If a PPAPI permission corresponds to more than 1 Tizen privilege, you must add all the corresponding privileges.

Other Useful Tizen Privileges

The following table lists other application features that require Tizen privileges. The listed privileges are supported since Tizen 2.2.1.