# Application Privilege Configuration Guide
Application privileges are high-level capabilities of an application, for example, restricting an application from being uninstalled or restricting application data from being deleted.
OpenHarmony provides both general and device-specific application privileges. The latter can be configured by device vendors for applications on different devices. The privileges configured in the **install_list_capability.json** file take precedence over the privileges configured in the signature certificate.
> **NOTE**
To avoid user dissatisfaction or even infringement, do not abuse application privileges.
## General Application Privileges
### Introduction
General application privileges are privileges available to applications on all types of devices. The general application privileges include the following:
| Privilege| Description |
| ---------------- | ------------------------------------------------------------ |
| AllowAppDataNotCleared | Allows application data not to be deleted.|
| AllowAppDesktopIconHide | Allows the application icon to be hidden from the home screen.|
| AllowAbilityPriorityQueried | Allows an ability to configure and query the priority. |
| AllowAbilityExcludeFromMissions | Allows an ability to be hidden in the mission stack.|
### How to Configure
1. Add the **app-privilege-capabilities** field to the [**HarmonyAppProvision** file](../../application-dev/security/app-provision-structure.md) to configure general privilege capabilities as required.
2. Use the hapsigner tool to sign the [**HarmonyAppProvision** file](../../application-dev/security/app-provision-structure.md) to generate a .p7b file.
3. Use the .p7b file to sign the HAP.
Reference: [hapsigner](https://gitee.com/openharmony/developtools_hapsigner#README.md)
### Example
```json
{
"version-name": "1.0.0",
...
"bundle-info": {
"developer-id": "OpenHarmony",
...
},
"issuer": "pki_internal",
"app-privilege-capabilities": ["AllowAppDataNotCleared", "AllowAppDesktopIconHide"] // The application data cannot be deleted, and the application icon can be hidden on the home screen.
}
```
## Device-specific Application Privileges
### Introduction
In addition to general application privileges, device vendors can define device-specific privileges for an application. The table below describes the device-specific privileges.
| Privilege | Type | Default Value| Description |
| --------------------- | -------- | ------ | ------------------------------------------------- |
| removable | bool | true | Allows an application to be uninstalled. This privilege takes effect only for preset applications. |
| keepAlive | bool | false | Allows an application to keep running in the background. |
| singleton | bool | false | Allows an application to be installed for a single user (User 0). |
| allowCommonEvent | string[] | - | Allows an application to be started by a static broadcast. |
| associatedWakeUp | bool | false | Allows an application in the FA model to be woken up by an associated application. |
| runningResourcesApply | bool | false | Allows an application to request running resources, such as the CPU, event notifications, and Bluetooth.|
| allowAppDataNotCleared | bool | false|Allows application data not to be deleted.|
| allowAppMultiProcess | bool | false| Allows an application to run on multiple processes.|
| allowAppDesktopIconHide | bool | false| Allows the application icon to be hidden from the home screen.|
| allowAbilityPriorityQueried | bool | false| Allows an ability to configure and query the priority. |
| allowAbilityExcludeFromMissions | bool | false| Allows an ability to be hidden in the mission stack.|
| allowAppUsePrivilegeExtension | bool | false|Allows an application to use ServiceExtension and DataExtension abilities.|
| allowFormVisibleNotify | bool | false| Allows a widget to be visible on the home screen.|
| allowAppShareLibrary | bool | false | Allows an application to provide the [inter-application HSP capability](../../application-dev/quick-start/cross-app-hsp.md) for other applications.
### How to Configure
Configure the required privileges in the [configuration file](https://gitee.com/openharmony/vendor_hihope/tree/master/rk3568/preinstall-config).
### Example
#### Configuration in install_list_capability.json
```json
{
"install_list": [
{
"bundleName": "com.example.kikakeyboard",
"singleton": true, // The application is installed for a single user.
"keepAlive": true, // The application can be running in the background.
"runningResourcesApply": true, // The application can apply for running resources such as the CPU, event notifications, and Bluetooth.
"associatedWakeUp": true, // The application in the FA model can be woken up by an associated application.
"app_signature": ["****"], // The setting takes effect only when the configured certificate fingerprint is the same as the HAP certificate fingerprint.
"allowCommonEvent": ["usual.event.SCREEN_ON", "usual.event.THERMAL_LEVEL_CHANGED"]
"allowAppDataNotCleared": true, // The application data cannot be deleted.
"allowAppMultiProcess": true, // Allow the application to run on multiple processes.
"allowAppDesktopIconHide": true, // Allow the application icon to be hidden from the home screen.
"allowAbilityPriorityQueried": true, // Allow the ability to configure the query priority.
"allowAbilityExcludeFromMissions": true, // Allow the ability to be hidden in the mission stack.
"allowAppUsePrivilegeExtension": true, // Allow the application to use ServiceExtension and DataExtension abilities.
"allowFormVisibleNotify": true // Allow a widget to be visible on the home screen.
"allowAppShareLibrary": true // Allow the application to provide the inter-application HSP capability.
},
}
```
**Obtaining the Certificate Fingerprint**
1. Create the **profile.cer** file, and copy the certificate content under the **distribution-certificate** field of the [**HarmonyAppProvision** file](../../application-dev/security/app-provision-structure.md) to the **profile.cer** file.
```json
{
...
"bundle-info": {
"distribution-certificate": "-----BEGIN CERTIFICATE----\nMIICMzCCAbegAwIBAgIEaOC/zDAMBggqhkjOPQQDAwUAMk..." / Certificate content.
...
}
...
}
```
2. Apply line breaks in the **profile.cer** content and remove the newline characters.
```
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
```
3. Use keytool to run the following command to obtain the certificate fingerprint.
> **NOTE**
You can obtain keytool from the **\tools\openjdk\bin** directory after DevEco Studio is installed.
```shell
keytool -printcert -file profile.cer
# Example
# result:
# Issued To: CN=OpenHarmony Application Release, OU=OpenHarmony Team, O=OpenHarmony, C=CN
# Issued By: CN=OpenHarmony Application CA, OU=OpenHarmony Team, O=OpenHarmony, C=CN
# SN: 68e0bfcc
# Valid From: Tue Feb 02 20:19:31 CST 2021, Valid To: Fri Dec 31 20:19:31 CST 2049
# Fingerprints:
# SHA1 fingerprint: E3:E8:7C:65:B8:1D:02:52:24:6A:06:A4:3C:4A:02:39:19:92:D1:F5
# SHA256 fingerprint: 8E:93:86:3F:C3:2E:E2:38:06:0B:F6:9A:9B:37:E2:60:8F:FF:B2:1F:93:C8:62:DD:51:1C:BA:C9:F3:00:24:B5 // After the colons are removed, the fingerprint is 8E93863FC32EE238060BF69A9B37E2608FFFB21F93C862DD511CBAC9F30024B5.
# ...
```
#### Configuration in install_list.json
```json
{
"install_list" : [
{
"app_dir" : "/system/app/com.ohos.launcher",
"removable": true // The application can be uninstalled.
}
]
}
```