harmony 鸿蒙\@ohos.dlpPermission (DLP)

  • 2023-10-30
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\@ohos.dlpPermission (DLP)

Data loss prevention (DLP) is a system solution provided by OpenHarmony to prevent data disclosure. The dlpPermission module provides APIs for cross-device file access management, encrypted storage, and access authorization.

NOTE

The initial APIs of this module are supported since API version 10. Newly added APIs will be marked with a superscript to indicate their earliest API version.

Modules to Import

import dlpPermission from '@ohos.dlpPermission';

dlpPermission.isDLPFile

isDLPFile(fd: number): Promise<boolean>

Checks whether a file is a DLP file. This API uses a promise to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
fd number Yes File descriptor (FD) of the file to check.

Return value |Type|Description| |——–|——–| |Promise<boolean>|Promise used to return the result. The value true means the file is a DLP file; the value false means the opposite.|

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
401 Parameter error.
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
try {
  let res = dlpPermission.isDLPFile(file.fd);  // Check whether the file is a DLP file.
  console.info('res', res);
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}
fs.closeSync(file);

dlpPermission.isDLPFile

isDLPFile(fd: number, callback: AsyncCallback<boolean>): void

Checks whether a file is a DLP file. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
fd number Yes FD of the file to check.
callback AsyncCallback<boolean> Yes Callback invoked to return the result.
The value true means the file is a DLP file; the value false means the opposite.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
401 Parameter error.
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
try {
  dlpPermission.isDLPFile(file.fd, (err, res) => {
    if (err != undefined) {
      console.error('isDLPFile error,', err.code, err.message);
    } else {
      console.info('res', res);
    }
    fs.closeSync(file);
  });
} catch (err) {
  console.error('isDLPFile error,', (err as BusinessError).code, (err as BusinessError).message);
  fs.closeSync(file);
}

dlpPermission.getDLPPermissionInfo

getDLPPermissionInfo(): Promise<DLPPermissionInfo>

Obtains the permission information of this DLP file. This API uses a promise to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Return value

Type Description
Promise<DLPPermissionInfo> Promise used to return the permission information about the DLP file. The operation is successful if no error is reported.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
19100001 Invalid parameter value.
19100006 No permission to invoke this API, which is for DLP sandbox application.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  let inSandbox = dlpPermission.isInSandbox(); // Check whether the application is running in a sandbox.
  if (inSandbox) {
    let res: dlpPermission.DLPPermissionInfo = dlpPermission.getDLPPermissionInfo(); // Obtain the permission information.
    console.info('res', JSON.stringify(res));
  }
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}

dlpPermission.getDLPPermissionInfo

getDLPPermissionInfo(callback: AsyncCallback<DLPPermissionInfo>): void

Obtains the permission information of this DLP file. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
callback AsyncCallback<DLPPermissionInfo> Yes Callback invoked to return the result.
If the operation is successful, err is undefined. Otherwise, err is an error object.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
401 Parameter error.
19100001 Invalid parameter value.
19100006 No permission to invoke this API, which is for DLP sandbox application.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

try {
  let inSandbox = dlpPermission.isInSandbox(); // Check whether the application is running in a sandbox.
  if (inSandbox) {
    dlpPermission.getDLPPermissionInfo((err, res) => {
      if (err != undefined) {
        console.error('getDLPPermissionInfo error,', err.code, err.message);
      } else {
        console.info('res', JSON.stringify(res));
      }
    }); // Obtain the permission information.
  }
} catch (err) {
  console.error('getDLPPermissionInfo error,', (err as BusinessError).code, (err as BusinessError).message);
}

dlpPermission.getOriginalFileName

getOriginalFileName(fileName: string): string

Obtains the original file name of a DLP file. This API returns the result synchronously.

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
fileName string Yes Name of the target file.

Return value

Type Description
string Original name of the DLP file obtained. For example, if the DLP file name is test.txt.dlp, the original file name returned is test.txt.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  let res = dlpPermission.getOriginalFileName('test.txt.dlp'); // Obtain the original file name.
  console.info('res', res);
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}

dlpPermission.getDLPSuffix

getDLPSuffix(): string

Obtains the DLP file name extension. This API returns the result synchronously.

System capability: SystemCapability.Security.DataLossPrevention

Return value

Type Description
string DLP file name extension obtained. For example, if the original file is text.txt and the returned file name extension is .dlp, the DLP file name is test.txt.dlp.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  let res = dlpPermission.getDLPSuffix(); // Obtain the DLP file name extension.
  console.info('res', res);
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}

dlpPermission.on(‘openDLPFile’)

on(type: ‘openDLPFile’, listener: Callback<AccessedDLPFileInfo>): void

Subscribes to a DLP file open event. The application will be notified when the DLP file is opened.

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
type ‘openDLPFile’ Yes Event type. The value is ‘openDLPFile’, which indicates a file open event.
listener Callback<AccessedDLPFileInfo> Yes Callback invoked when a DLP file is opened. A notification will be sent to the application.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
401 Parameter error.
19100001 Invalid parameter value.
19100007 No permission to invoke this API, which is not for DLP sandbox application.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  dlpPermission.on('openDLPFile', (info: dlpPermission.AccessedDLPFileInfo) => {
    console.info('openDlpFile event', info.uri, info.lastOpenTime)
  // Subscribe to a DLP file open event.
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}

dlpPermission.off(‘openDLPFile’)

off(type: ‘openDLPFile’, listener?: Callback<AccessedDLPFileInfo>): void

Unsubscribes from the DLP file open event. The application will not be notified when a DLP file is opened.

System capability: SystemCapability.Security.DataLossPrevention

Parameters |Name|Type|Mandatory|Description| |——–|——–|——–|——–| |type|‘openDLPFile’|Yes|Event type. The value is ‘openDLPFile’, which indicates a file open event.| |listener|Callback<AccessedDLPFileInfo>|No|Callback for the DLP file open event. The application will not be notified when a DLP file is opened. By default, this parameter is left blank, which unregisters all callbacks for the file open event.|

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
401 Parameter error.
19100001 Invalid parameter value.
19100007 No permission to invoke this API, which is not for DLP sandbox application.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  dlpPermission.off('openDLPFile', (info: dlpPermission.AccessedDLPFileInfo) => {
    console.info('openDlpFile event', info.uri, info.lastOpenTime)
  // Unsubscribe from the DLP file open events.
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}

dlpPermission.isInSandbox

isInSandbox(): Promise<boolean>

Checks whether this application is running in a DLP sandbox environment. This API uses a promise to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Return value

Type Description
Promise<boolean> Promise used to return the result.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  let inSandbox = dlpPermission.isInSandbox(); // Check whether the application is running in a sandbox.
  console.info('res', inSandbox);
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}

dlpPermission.isInSandbox

isInSandbox(callback: AsyncCallback<boolean>): void

Checks whether this application is running in a DLP sandbox environment. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
callback AsyncCallback<boolean> Yes Callback invoked to return the result.
If the operation is successful, err is undefined. Otherwise, err is an error object.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
401 Parameter error.
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  dlpPermission.isInSandbox((err, data) => {
    if (err) {
      console.error('isInSandbox error,', err.code, err.message);
    } else {
      console.info('isInSandbox, data');
    }
  }); // Whether the application is running in the sandbox.
} catch (err) {
  console.error('isInSandbox error,', (err as BusinessError).code, (err as BusinessError).message);
}

dlpPermission.getDLPSupportedFileTypes

getDLPSupportedFileTypes(): Promise<Array<string>>

Obtains the file name extension types that support DLP. This API uses a promise to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Return value

Type Description
Promise<Array<string>> Promise used to return the file name extension types obtained.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  let res = dlpPermission.getDLPSupportedFileTypes(); // Obtain the file types that support DLP.
  console.info('res', JSON.stringify(res));
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}

dlpPermission.getDLPSupportedFileTypes

getDLPSupportedFileTypes(callback: AsyncCallback<Array<string>>): void

Obtains the file name extension types that support DLP. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
callback AsyncCallback<Array<string>> Yes Callback invoked to return the result.
If the operation is successful, err is undefined. Otherwise, err is an error object.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
401 Parameter error.
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  dlpPermission.getDLPSupportedFileTypes((err, res) => {
    if (err != undefined) {
      console.error('getDLPSupportedFileTypes error,', err.code, err.message);
    } else {
      console.info('res', JSON.stringify(res));
    }
  }); // Obtain the file types that support DLP.
} catch (err) {
  console.error('getDLPSupportedFileTypes error,', (err as BusinessError).code, (err as BusinessError).message);
}

dlpPermission.setRetentionState

setRetentionState(docUris: Array<string>): Promise<void>

Sets the retention state for sandbox applications. The sandbox application in the retention state will not be automatically uninstalled when the DLP file is closed. This API uses a promise to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
docUris Array<string> Yes URIs of the files to be set with the retention state.

Return value

Type Description
Promise<void> Promise that returns no value.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
401 Parameter error.
19100001 Invalid parameter value.
19100006 No permission to invoke this API, which is for DLP sandbox application.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  let inSandbox = dlpPermission.isInSandbox(); // Check whether the application is running in a sandbox.
  if (inSandbox) {
    dlpPermission.setRetentionState([uri]); // Set the retention state for a sandbox application.
  }
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}

dlpPermission.setRetentionState

setRetentionState(docUris: Array<string>, callback: AsyncCallback<void>): void

Sets the retention state for sandbox applications. The sandbox application in the retention state will not be automatically uninstalled when the DLP file is closed. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
docUris Array<string> Yes URIs of the files to be set with the retention state.
callback AsyncCallback<void> Yes Callback invoked to return the result.
If the operation is successful, err is undefined. Otherwise, err is an error object.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
401 Parameter error.
19100001 Invalid parameter value.
19100006 No permission to invoke this API, which is for DLP sandbox application.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  dlpPermission.setRetentionState([uri], (err, res) => {
    if (err != undefined) {
      console.error('setRetentionState error,', err.code, err.message);
    } else {
      console.info('setRetentionState success');
    }
  }); // Set the sandbox retention state.
} catch (err) {
  console.error('setRetentionState error,', (err as BusinessError).code, (err as BusinessError).message);
}

dlpPermission.cancelRetentionState

cancelRetentionState(docUris: Array<string>): Promise<void>

Cancels the retention state for sandbox applications. This API uses a promise to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
docUris Array<string> Yes URIs of the files whose retention state is to be canceled.

Return value

Type Description
Promise<void> Promise that returns no value.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
401 Parameter error.
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  dlpPermission.cancelRetentionState([uri]); // Cancel the retention state for a sandbox application.
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}

dlpPermission.cancelRetentionState

cancelRetentionState(docUris: Array<string>, callback: AsyncCallback<void>): void

Cancels the retention state for sandbox applications. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
docUris Array<string> Yes URIs of the files whose retention state is to be canceled.
callback AsyncCallback<void> Yes Callback invoked to return the result.
If the operation is successful, err is undefined. Otherwise, err is an error object.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
401 Parameter error.
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  dlpPermission.cancelRetentionState([uri], (err, res) => {
    if (err != undefined) {
      console.error('cancelRetentionState error,', err.code, err.message);
    } else {
      console.info('cancelRetentionState success');
    }
  }); // Cancel the sandbox retention state.
} catch (err) {
  console.error('cancelRetentionState error,', (err as BusinessError).code, (err as BusinessError).message);
}

dlpPermission.getRetentionSandboxList

getRetentionSandboxList(bundleName?: string): Promise<Array<RetentionSandboxInfo>>

Obtains the sandbox applications in the retention state of an application. This API uses a promise to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
bundleName string No Bundle name of the application. By default, this parameter is left empty, which obtains the sandbox retention information about the current application.

Return value

Type Description
Promise<RetentionSandboxInfo> Promise used to return the sandbox retention information obtained.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
401 Parameter error.
19100001 Invalid parameter value.
19100007 No permission to invoke this API, which is not for DLP sandbox application.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  let res: Array<dlpPermission.RetentionSandboxInfo> = dlpPermission.getRetentionSandboxList(); // Obtain information about all the sandbox applications in the retention state.
  console.info('res', JSON.stringify(res))
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}

dlpPermission.getRetentionSandboxList

getRetentionSandboxList(bundleName: string, callback: AsyncCallback&lt;Array&lt;RetentionSandboxInfo&gt;&gt;): void

Obtains the sandbox applications in the retention state of an application. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
bundleName string Yes Bundle name of the application.
callback AsyncCallback&lt;RetentionSandboxInfo&gt; Yes Callback invoked to return the result.
If the operation is successful, err is undefined. Otherwise, err is an error object.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
401 Parameter error.
19100001 Invalid parameter value.
19100007 No permission to invoke this API, which is not for DLP sandbox application.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  dlpPermission.getRetentionSandboxList("bundleName", (err, res) => {
    if (err != undefined) {
      console.error('getRetentionSandboxList error,', err.code, err.message);
    } else {
      console.info('res', JSON.stringify(res));
    }
  }); // Obtain the sandbox retention information.
} catch (err) {
  console.error('getRetentionSandboxList error,', (err as BusinessError).code, (err as BusinessError).message);
}

dlpPermission.getRetentionSandboxList

getRetentionSandboxList(callback: AsyncCallback&lt;Array&lt;RetentionSandboxInfo&gt;&gt;): void

Obtains the sandbox applications in the retention state of this application. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
callback AsyncCallback&lt;RetentionSandboxInfo&gt; Yes Callback invoked to return the result.
If the operation is successful, err is undefined. Otherwise, err is an error object.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
401 Parameter error.
19100001 Invalid parameter value.
19100007 No permission to invoke this API, which is not for DLP sandbox application.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  dlpPermission.getRetentionSandboxList((err, res) => {
    if (err != undefined) {
      console.error('getRetentionSandboxList error,', err.code, err.message);
    } else {
      console.info('res', JSON.stringify(res));
    }
  }); // Obtain the sandbox retention information.
} catch (err) {
  console.error('getRetentionSandboxList error,', (err as BusinessError).code, (err as BusinessError).message);
}

dlpPermission.getDLPFileAccessRecords

getDLPFileAccessRecords(): Promise&lt;Array&lt;AccessedDLPFileInfo&gt;&gt;

Obtains the list of DLP files that are accessed recently. This API uses a promise to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Return value

Type Description
Promise&lt;AccessedDLPFileInfo&gt; Promise used to return the list of recently accessed files obtained.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
19100001 Invalid parameter value.
19100007 No permission to invoke this API, which is not for DLP sandbox application.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  let res: Array<dlpPermission.AccessedDLPFileInfo> = dlpPermission.getDLPFileAccessRecords(); // Obtain the list of recently accessed DLP files.
  console.info('res', JSON.stringify(res))
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}

dlpPermission.getDLPFileAccessRecords

getDLPFileAccessRecords(callback: AsyncCallback&lt;Array&lt;AccessedDLPFileInfo&gt;&gt;): void

Obtains the list of DLP files that are accessed recently. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
callback AsyncCallback&lt;AccessedDLPFileInfo&gt; Yes Callback invoked to return the result.
If the operation is successful, err is undefined. Otherwise, err is an error object.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
401 Parameter error.
19100001 Invalid parameter value.
19100007 No permission to invoke this API, which is not for DLP sandbox application.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  dlpPermission.getDLPFileAccessRecords((err, res) => {
    if (err != undefined) {
      console.error('getDLPFileAccessRecords error,', err.code, err.message);
    } else {
      console.info('res', JSON.stringify(res));
    }
  }); // Obtain the list of recently accessed DLP files.
} catch (err) {
  console.error('getDLPFileAccessRecords error,', (err as BusinessError).code, (err as BusinessError).message);
}

dlpPermission.getDLPGatheringPolicy

getDLPGatheringPolicy(): Promise&lt;GatheringPolicyType&gt;

Obtains the DLP sandbox gathering policy. This API uses a promise to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Return value

Type Description
Promise&lt;GatheringPolicyType&gt; Promise used to return the DLP sandbox aggregation policy obtained.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  let res: dlpPermission.GatheringPolicyType = dlpPermission.getDLPGatheringPolicy(); //  Obtain the sandbox gathering policy.
  console.info('res', JSON.stringify(res));
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}

dlpPermission.getDLPGatheringPolicy

getDLPGatheringPolicy(callback: AsyncCallback&lt;GatheringPolicyType&gt;): void

Obtains the DLP sandbox gathering policy. This API uses an asynchronous callback to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
callback AsyncCallback&lt;GatheringPolicyType&gt; Yes Callback invoked to return the result.
If the operation is successful, err is undefined. Otherwise, err is an error object.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  dlpPermission.getDLPGatheringPolicy((err, res) => {
    if (err != undefined) {
      console.error('getDLPGatheringPolicy error,', err.code, err.message);
    } else {
      console.info('res', JSON.stringify(res));
    }
  }); // Obtain the sandbox gathering policy.
} catch (err) {
  console.error('getDLPGatheringPolicy error,', (err as BusinessError).code, (err as BusinessError).message);
}

dlpPermission.installDLPSandbox

installDLPSandbox(bundleName: string, access: DLPFileAccess, userId: number, uri: string): Promise&lt;DLPSandboxInfo&gt;

Installs a DLP sandbox application for an application. This API uses a promise to return the application sandbox installed.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
bundleName string Yes Bundle name of the application.
access DLPFileAccess Yes Permission on the DLP file.
userId number Yes Current user ID, which is the OS account ID obtained by the account subsystem. The default super user ID is 100.
uri string Yes URI of the DLP file.

Return value

Type Description
Promise&lt;DLPSandboxInfo&gt; Promise used to return the information about the sandbox application installed.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  let res: dlpPermission.DLPSandboxInfo = dlpPermission.installDLPSandbox('com.ohos.note', dlpPermission.DLPFileAccess.READ_ONLY, 100, uri); // Install a DLP sandbox application.
  console.info('res', JSON.stringify(res));
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}

dlpPermission.installDLPSandbox

installDLPSandbox(bundleName: string, access: DLPFileAccess, userId: number, uri:string, callback: AsyncCallback&lt;DLPSandboxInfo&gt;): void

Installs a DLP sandbox application for an application. This API uses an asynchronous callback to return the index of the sandbox application installed.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
bundleName string Yes Bundle name of the application.
access DLPFileAccess Yes Permission on the DLP file.
userId number Yes Current user ID, which is the OS account ID obtained by the account subsystem. The default super user ID is 100.
uri string Yes URI of the DLP file.
callback AsyncCallback&lt;DLPSandboxInfo&gt; Yes Callback invoked to return the information about the sandbox application installed.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  dlpPermission.installDLPSandbox('com.ohos.note', dlpPermission.DLPFileAccess.READ_ONLY, 100, uri, (err, res) => {
    if (err != undefined) {
      console.error('installDLPSandbox error,', err.code, err.message);
    } else {
      console.info('res', JSON.stringify(res));
    }
  }); // Install a DLP sandbox application.
} catch (err) {
  console.error('installDLPSandbox error,', (err as BusinessError).code, (err as BusinessError).message);
}

dlpPermission.uninstallDLPSandbox

uninstallDLPSandbox(bundleName: string, userId: number, appIndex: number): Promise&lt;void&gt;

Uninstalls a DLP sandbox application for an application. This API uses a promise to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
bundleName string Yes Bundle name of the application.
userId number Yes Current user ID, which is the OS account ID obtained by the account subsystem. The default super user ID is 100.
appIndex number Yes Index of the DLP sandbox application.

Return value

Type Description
Promise&lt;void&gt; Promise that returns no value.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  let res: dlpPermission.DLPSandboxInfo = dlpPermission.installDLPSandbox('com.ohos.note', dlpPermission.DLPFileAccess.READ_ONLY, 100, uri); // Install a DLP sandbox application.
  console.info('res', JSON.stringify(res));
  dlpPermission.uninstallDLPSandbox('com.ohos.note', 100, res.appIndex); // Uninstall a DLP sandbox application.
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}

dlpPermission.uninstallDLPSandbox

uninstallDLPSandbox(bundleName: string, userId: number, appIndex: number, callback: AsyncCallback&lt;void&gt;): void

Uninstalls a DLP sandbox application for an application. This API uses an asynchronous callback to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
bundleName string Yes Bundle name of the application.
userId number Yes Current user ID, which is the OS account ID obtained by the account subsystem. The default super user ID is 100.
appIndex number Yes DLP sandbox appliction index, which is the value returned after installDLPSandbox is successfully called.
callback AsyncCallback&lt;void&gt; Yes Callback invoked to return the uninstallation result.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  let res: dlpPermission.DLPSandboxInfo = await dlpPermission.installDLPSandbox('com.ohos.note', dlpPermission.DLPFileAccess.READ_ONLY, 100, uri); // Install a DLP sandbox application.
  console.info('res', JSON.stringify(res));
  dlpPermission.uninstallDLPSandbox('com.ohos.note', 100, res.appIndex, (err, res) => {
    if (err != undefined) {
      console.error('uninstallDLPSandbox error,', err.code, err.message);
    } else {
      console.info('res', JSON.stringify(res));
    }
  });
} catch (err) {
  console.error('uninstallDLPSandbox error,', (err as BusinessError).code, (err as BusinessError).message);
}

dlpPermission.on(‘uninstallDLPSandbox’)

on(type: ‘uninstallDLPSandbox’, listener: Callback&lt;DLPSandboxState&gt;): void

Subscribes to a DLP sandbox uninstall event.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters |Name|Type|Mandatory|Description| |——–|——–|——–|——–| |type|‘uninstallDLPSandbox’|Yes|Event type.| |listener|Callback&lt;DLPSandboxState&gt;|Yes|Callback invoked when a sandbox application is uninstalled.|

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  dlpPermission.on('uninstallDLPSandbox', (info: dlpPermission.DLPSandboxState) => {
    console.info('uninstallDLPSandbox event', info.appIndex, info.bundleName)
  // Subscribe to a DLP sandbox uninstall event.
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}

dlpPermission.off(‘uninstallDLPSandbox’)

off(type: ‘uninstallDLPSandbox’, listener?: Callback&lt;DLPSandboxState&gt;): void

Unsubscribes from the DLP sandbox uninstall event.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters |Name|Type|Mandatory|Description| |——–|——–|——–|——–| |type|‘uninstallDLPSandbox’|Yes|Event type.| |listener|Callback&lt;DLPSandboxState&gt;|No|Callback for the sandbox uninstall event. By default, this parameter is left blank, which unregisters all callbacks for the sandbox uninstall event.|

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import { BusinessError } from '@ohos.base';

try {
  dlpPermission.off('uninstallDLPSandbox', (info: dlpPermission.DLPSandboxState) => {
    console.info('uninstallDLPSandbox event', info.appIndex, info.bundleName)
  // Unsubscribe from the DLP sandbox uninstall events.
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}

DLPFile

Provides APIs for managing DLP files. A DLPFile instance indicates a DLP file object. You can call generateDLPFile or openDLPFile to obtain a DLPFile instance.

Attributes

System API: This is a system API.

System capability: SystemCapability.Security.DataLossPrevention

Name Type Read Only Mandatory Description
dlpProperty DLPProperty No Yes Authorized user information.

addDLPLinkFile

addDLPLinkFile(linkFileName: string): Promise&lt;void&gt;

Adds a link file to the Filesystem in Userspace (FUSE). The link file is a virtual file mapped to the ciphertext in the FUSE. The read and write operations on the link file will be synchronized to the DLP file. This API uses a promise to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
linkFileName string Yes Name of the link file to add.

Return value

Type Description
Promise&lt;void&gt; Promise that returns no value.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100009 Failed to operate the DLP file.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
try {
  let dlpFile: dlpPermission.DLPFile = dlpPermission.openDLPFile(file.fd); // Open a DLP file.
  dlpFile.addDLPLinkFile('test.txt.dlp.link'); // Add a link file.
  dlpFile.closeDLPFile(); // Close the DLPFile instance.
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}
fs.closeSync(file);

addDLPLinkFile

addDLPLinkFile(linkFileName: string, callback: AsyncCallback&lt;void&gt;): void

Adds a link file to the FUSE. This API uses an asynchronous callback to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
linkFileName string Yes Name of the link file to add.
callback AsyncCallback&lt;void&gt; Yes Callback invoked to return the result.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100009 Failed to operate the DLP file.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
try {
  let dlpFile: dlpPermission.DLPFile = dlpPermission.openDLPFile(file.fd); // Open a DLP file.
  dlpFile.addDLPLinkFile('test.txt.dlp.link', async (err, res) => {
    if (err != undefined) {
      console.error('addDLPLinkFile error,', err.code, err.message);
      await dlpFile.closeDLPFile(); // Close the DLPFile instance.
    } else {
      console.info('res', JSON.stringify(res));
    }
  });
} catch (err) {
  console.error('addDLPLinkFile error,', (err as BusinessError).code, (err as BusinessError).message);
}

stopFuseLink

stopFuseLink(): Promise&lt;void&gt;

Stops the read and write on the FUSE. This API uses a promise to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Return value

Type Description
Promise&lt;void&gt; Promise that returns no value.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
19100001 Invalid parameter value.
19100009 Failed to operate the DLP file.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
try {
  let dlpFile: dlpPermission.DLPFile = dlpPermission.openDLPFile(file.fd); // Open a DLP file.
  dlpFile.addDLPLinkFile('test.txt.dlp.link'); // Add a link file.
  dlpFile.stopFuseLink(); // Stop read/write on the link file.
  dlpFile.closeDLPFile(); // Close the DLPFile instance.
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}
fs.closeSync(file);

stopFuseLink

stopFuseLink(callback: AsyncCallback&lt;void&gt;): void

Stops the read and write on the FUSE. This API uses an asynchronous callback to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
callback AsyncCallback&lt;void&gt; Yes Callback invoked to return the result.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100009 Failed to operate the DLP file.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
try {
  let dlpFile: dlpPermission.DLPFile = dlpPermission.openDLPFile(file.fd); // Open a DLP file.
  dlpFile.addDLPLinkFile('test.txt.dlp.link'); // Add a link file.
  dlpFile.stopFuseLink(async (err, res) => {
    if (err != undefined) {
      console.error('stopFuseLink error,', err.code, err.message);
      await dlpFile.closeDLPFile(); // Close the DLPFile instance.
    } else {
      console.info('res', JSON.stringify(res));
    }
  });
} catch (err) {
  console.error('stopFuseLink error,', (err as BusinessError).code, (err as BusinessError).message);
}

resumeFuseLink

resumeFuseLink(): Promise&lt;void&gt;

Resumes the read and write on the FUSE. This API uses a promise to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Return value

Type Description
Promise&lt;void&gt; Promise that returns no value.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
19100001 Invalid parameter value.
19100009 Failed to operate the DLP file.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
try {
  let dlpFile: dlpPermission.DLPFile = dlpPermission.openDLPFile(file.fd); // Open a DLP file.
  dlpFile.addDLPLinkFile('test.txt.dlp.link'); // Add a link file.
  dlpFile.stopFuseLink(); // Stop read/write on the link file.
  dlpFile.resumeFuseLink(); // Resume read/write on the link file.
  dlpFile.closeDLPFile(); // Close the DLPFile instance.
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}
fs.closeSync(file);

resumeFuseLink

resumeFuseLink(callback: AsyncCallback&lt;void&gt;): void

Resumes the read and write on the FUSE. This API uses an asynchronous callback to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
callback AsyncCallback&lt;void&gt; Yes Callback invoked to return the result.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100009 Failed to operate the DLP file.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
try {
  let dlpFile: dlpPermission.DLPFile = dlpPermission.openDLPFile(file.fd); // Open a DLP file.
  dlpFile.addDLPLinkFile('test.txt.dlp.link'); // Add a link file.
  dlpFile.stopFuseLink(); // Stop read/write on the link file.
  dlpFile.resumeFuseLink(async (err, res) => {
    if (err != undefined) {
      console.error('resumeFuseLink error,', err.code, err.message);
      await dlpFile.closeDLPFile(); // Close the DLPFile instance.
    } else {
      console.info('res', JSON.stringify(res));
    }
  });
} catch (err) {
  console.error('resumeFuseLink error,', (err as BusinessError).code, (err as BusinessError).message);
}

replaceDLPLinkFile

replaceDLPLinkFile(linkFileName: string): Promise&lt;void&gt;

Replaces a link file. This API uses a promise to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
linkFileName string Yes Name of the link file to replace.

Return value

Type Description
Promise&lt;void&gt; Promise that returns no value.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100009 Failed to operate the DLP file.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
try {
  let dlpFile: dlpPermission.DLPFile = dlpPermission.openDLPFile(file.fd); // Open a DLP file.
  dlpFile.addDLPLinkFile('test.txt.dlp.link'); // Add a link file.
  dlpFile.stopFuseLink(); // Stop read/write on the link file.
  dlpFile.replaceDLPLinkFile('test_new.txt.dlp.link'); // Replace the link file.
  dlpFile.resumeFuseLink(); // Resume read/write on the link file.
  dlpFile.closeDLPFile(); // Close the DLPFile instance.
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}
fs.closeSync(file);

replaceDLPLinkFile

replaceDLPLinkFile(linkFileName: string, callback: AsyncCallback&lt;void&gt;): void

Replaces a link file. This API uses an asynchronous callback to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
linkFileName string Yes Name of the link file to replace.
callback AsyncCallback&lt;void&gt; Yes Callback invoked to return the result.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100009 Failed to operate the DLP file.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
try {
  let dlpFile: dlpPermission.DLPFile = dlpPermission.openDLPFile(file.fd); // Open a DLP file.
  dlpFile.addDLPLinkFile('test.txt.dlp.link'); // Add a link file.
  dlpFile.stopFuseLink(); // Stop read/write on the link file.
  dlpFile.replaceDLPLinkFile('test_new.txt.dlp.link', async (err, res) => { // Replace a link file.
    if (err != undefined) {
      console.error('replaceDLPLinkFile error,', err.code, err.message);
      await dlpFile.closeDLPFile(); // Close the DLPFile instance.
    } else {
      console.info('res', JSON.stringify(res));
      await dlpFile.resumeFuseLink(); // Resume read/write on the link file.
    }
  });
} catch (err) {
  console.error('error,', (err as BusinessError).code, (err as BusinessError).message);
}

deleteDLPLinkFile

deleteDLPLinkFile(linkFileName: string): Promise&lt;void&gt;

Deletes a link file from the FUSE. This API uses a promise to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
linkFileName string Yes Name of the link file to delete.

Return value

Type Description
Promise&lt;void&gt; Promise that returns no value.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100009 Failed to operate the DLP file.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
try {
  let dlpFile: dlpPermission.DLPFile = dlpPermission.openDLPFile(file.fd); // Open a DLP file.
  dlpFile.addDLPLinkFile('test.txt.dlp.link'); // Add a link file.
  dlpFile.deleteDLPLinkFile('test.txt.dlp.link'); // Delete the link file.
  dlpFile.closeDLPFile(); // Close the DLPFile instance.
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}
fs.closeSync(file);

deleteDLPLinkFile

deleteDLPLinkFile(linkFileName: string, callback: AsyncCallback&lt;void&gt;): void

Deletes a link file. This API uses an asynchronous callback to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
linkFileName string Yes Name of the link file to delete.
callback AsyncCallback&lt;void&gt; Yes Callback invoked to return the result.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100009 Failed to operate the DLP file.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
try {
  let dlpFile: dlpPermission.DLPFile = dlpPermission.openDLPFile(file.fd); // Open a DLP file.
  dlpFile.addDLPLinkFile('test.txt.dlp.link'); // Add a link file.
  dlpFile.deleteDLPLinkFile('test.txt.dlp.link', async (err, res) => { // Delete a link file.
    if (err != undefined) {
      console.error('deleteDLPLinkFile error,', err.code, err.message);
      await dlpFile.closeDLPFile(); // Close the DLPFile instance.
    } else {
      console.info('res', JSON.stringify(res));
    }
  });
} catch (err) {
  console.error('error,', (err as BusinessError).code, (err as BusinessError).message);
}

recoverDLPFile

recoverDLPFile(plaintextFd: number): Promise&lt;void&gt;

Recovers the plaintext of a DLP file. This API uses a promise to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
plaintextFd number Yes FD of the target plaintext file.

Return value

Type Description
Promise&lt;void&gt; Promise that returns no value.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100002 Credential task error.
19100003 Credential task time out.
19100004 Credential service error.
19100005 Remote credential server error.
19100008 Not DLP file.
19100009 Failed to operate the DLP file.
19100010 DLP file is read-only.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
let destFile = fs.openSync("destUri");
try {
  let dlpFile: dlpPermission.DLPFile = dlpPermission.openDLPFile(file.fd); // Open a DLP file.
  dlpFile.recoverDLPFile(destFile.fd); // Recover the plain text from the DLP file.
  dlpFile.closeDLPFile(); // Close the DLPFile instance.
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}
fs.closeSync(file);
fs.closeSync(destFile);

recoverDLPFile

recoverDLPFile(plaintextFd: number, callback: AsyncCallback&lt;void&gt;): void

Recovers the plaintext of a DLP file. This API uses an asynchronous callback to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
plaintextFd number Yes FD of the target plaintext file.
callback AsyncCallback&lt;void&gt; Yes Callback invoked to return the result.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100002 Credential task error.
19100003 Credential task time out.
19100004 Credential service error.
19100005 Remote credential server error.
19100008 Not DLP file.
19100009 Failed to operate the DLP file.
19100010 DLP file is read-only.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
let destFile = fs.openSync("destUri");
try {
  let dlpFile: dlpPermission.DLPFile = dlpPermission.openDLPFile(file.fd); // Open a DLP file.
  dlpFile.recoverDLPFile(destFile.fd, async (err, res) => { // Recover the plaintext of a DLP file.
    if (err != undefined) {
      console.error('recoverDLPFile error,', err.code, err.message);
      await dlpFile.closeDLPFile(); // Close the DLPFile instance.
    } else {
      console.info('res', JSON.stringify(res));
    }
  });
} catch (err) {
  console.error('error,', (err as BusinessError).code, (err as BusinessError).message);
}

closeDLPFile

closeDLPFile(): Promise&lt;void&gt;

Closes this DLPFile instance. This API uses a promise to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

NOTE

If a DLP file is no longer used, close the dlpFile instance to release the memory.

Return value

Type Description
Promise&lt;void&gt; Promise that returns no value.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
19100001 Invalid parameter value.
19100009 Failed to operate the DLP file.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
try {
  let dlpFile: dlpPermission.DLPFile = dlpPermission.openDLPFile(file.fd); // Open a DLP file.
  dlpFile.closeDLPFile(); // Close the DLPFile instance.
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}
fs.closeSync(file);

closeDLPFile

closeDLPFile(callback: AsyncCallback&lt;void&gt;): void

Closes this DLPFile instance. This API uses an asynchronous callback to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

NOTE

If a DLP file is no longer used, close the dlpFile instance to release the memory.

Parameters

Name Type Mandatory Description
callback AsyncCallback&lt;void&gt; Yes Callback invoked to return the result.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
19100001 Invalid parameter value.
19100009 Failed to operate the DLP file.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
try {
  let dlpFile: dlpPermission.DLPFile = dlpPermission.openDLPFile(file.fd); // Open a DLP file.
  dlpFile.closeDLPFile((err, res) => {// Close the DLP file.
    if (err != undefined) {
      console.error('closeDLPFile error,', err.code, err.message);
    } else {
      console.info('res', JSON.stringify(res));
    }
    fs.closeSync(file);
  });
} catch (err) {
  console.error('error,', (err as BusinessError).code, (err as BusinessError).message);
  fs.closeSync(file);
}

dlpPermission.generateDLPFile

generateDLPFile(plaintextFd: number, ciphertextFd: number, property: DLPProperty): Promise&lt;DLPFile&gt;

Generates a DLP file, which is an encrypted file that can be accessed only by authorized users. The users can have the full control permission or read-only permission on the DLP file. This API uses a promise to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
plaintextFd number Yes FD of the plaintext file to be encrypted.
ciphertextFd number Yes FD of the encrypted file.
property DLPProperty Yes Authorized user information, which includes the authorized user list, owner account, and contact account information.

Return value

Type Description
Promise&lt;DLPFile&gt; Promise used to return the result. If the operation is successful, a DLPFile instance is returned. Otherwise, null is returned.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100002 Credential task error.
19100003 Credential task time out.
19100004 Credential service error.
19100005 Remote credential server error.
19100009 Failed to operate the DLP file.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let dlpUri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt";
let file = fs.openSync(uri);
let dlp = fs.openSync(dlpUri);
try {
  let dlpProperty: dlpPermission.DLPProperty = {
    ownerAccount: 'zhangsan',
    ownerAccountType: dlpPermission.AccountType.DOMAIN_ACCOUNT,
    authUserList: [],
    contactAccount: 'zhangsan',
    offlineAccess: true,
    ownerAccountID: 'xxxxxxx',
    everyoneAccessList: []
  };
  let dlpFile: dlpPermission.DLPFile = dlpPermission.generateDLPFile(file.fd, dlp.fd, dlpProperty); // Generate a DLP file.
  dlpFile.closeDLPFile(); // Close the DLPFile instance.
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}
fs.closeSync(file);
fs.closeSync(dlp);

dlpPermission.generateDLPFile

generateDLPFile(plaintextFd: number, ciphertextFd: number, property: DLPProperty, callback: AsyncCallback&lt;DLPFile&gt;): void

Generates a DLP file, which is an encrypted file that can be accessed only by authorized users. The users can have the full control permission or read-only permission on the DLP file. This API uses an asynchronous callback to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
plaintextFd number Yes FD of the plaintext file to be encrypted.
ciphertextFd number Yes FD of the encrypted file.
property DLPProperty Yes Authorized user information, which includes the authorized user list, owner account, and contact account information.
callback AsyncCallback&lt;DLPFile&gt; Yes Callback invoked to return the DLPFile instance created.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100002 Credential task error.
19100003 Credential task time out.
19100004 Credential service error.
19100005 Remote credential server error.
19100009 Failed to operate the DLP file.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let dlpUri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt";
let file = fs.openSync(uri);
let dlp = fs.openSync(dlpUri);
try {
  let dlpProperty: dlpPermission.DLPProperty = {
    ownerAccount: 'zhangsan',
    ownerAccountType: dlpPermission.AccountType.DOMAIN_ACCOUNT,
    authUserList: [],
    contactAccount: 'zhangsan',
    offlineAccess: true,
    ownerAccountID: 'xxxxxxx',
    everyoneAccessList: []
  };
  dlpPermission.generateDLPFile(file.fd, dlp.fd, dlpProperty, (err, res) => { // Generate a DLP file.
    if (err != undefined) {
      console.error('generateDLPFile error,', err.code, err.message);
    } else {
      console.info('res', JSON.stringify(res));
    }
  });
} catch (err) {
  console.error('error,', (err as BusinessError).code, (err as BusinessError).message);
  fs.closeSync(file);
}

dlpPermission.openDLPFile

openDLPFile(ciphertextFd: number): Promise&lt;DLPFile&gt;

Opens a DLP file. This API uses a promise to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
ciphertextFd number Yes FD of the encrypted file.

Return value

Type Description
Promise&lt;DLPFile&gt; Promise used to return the result. If the operation is successful, a DLPFile instance is returned. Otherwise, null is returned.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100002 Credential task error.
19100003 Credential task time out.
19100004 Credential service error.
19100005 Remote credential server error.
19100008 Not DLP file.
19100009 Failed to operate the DLP file.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
try {
  let dlpFile: dlpPermission.DLPFile = dlpPermission.openDLPFile(file.fd); // Open a DLP file.
  dlpFile.closeDLPFile(); // Close the DLPFile instance.
} catch (err) {
  console.error('error', (err as BusinessError).code, (err as BusinessError).message); // Error reported if the operation fails.
}
fs.closeSync(file);

dlpPermission.openDLPFile

openDLPFile(ciphertextFd: number, callback: AsyncCallback&lt;DLPFile&gt;): void

Opens a DLP file. This API uses an asynchronous callback to return the result.

System API: This is a system API.

Required permissions: ohos.permission.ACCESS_DLP_FILE

System capability: SystemCapability.Security.DataLossPrevention

Parameters

Name Type Mandatory Description
ciphertextFd number Yes FD of the encrypted file.
callback AsyncCallback&lt;DLPFile&gt; Yes Callback invoked to return the DLPFile instance opened.

Error codes

For details about the error codes, see DLP Service Error Codes.

ID Error Message
201 Permission denied.
202 Non-system applications use system APIs.
401 Parameter error.
19100001 Invalid parameter value.
19100002 Credential task error.
19100003 Credential task time out.
19100004 Credential service error.
19100005 Remote credential server error.
19100008 Not DLP file.
19100009 Failed to operate the DLP file.
19100011 System service exception.

Example

import dlpPermission from '@ohos.dlpPermission';
import fs from '@ohos.file.fs';
import { BusinessError } from '@ohos.base';

let uri = "file://docs/storage/Users/currentUser/Desktop/test.txt.dlp";
let file = fs.openSync(uri);
try {
  dlpPermission.openDLPFile(file.fd, (err, res) => {// Open a DLP file.
    if (err != undefined) {
      console.error('openDLPFile error,', err.code, err.message);
    } else {
      console.info('res', JSON.stringify(res));
    }
  });
} catch (err) {
  console.error('error,', (err as BusinessError).code, (err as BusinessError).message);
  fs.closeSync(file);
}

ActionFlagType

Enumerates the operations that can be performed on a DLP file. For example, the DLP sandbox application can dim its button based on this parameter.

System capability: SystemCapability.Security.DataLossPrevention

Name Value Description
ACTION_VIEW 0x00000001 View the file.
ACTION_SAVE 0x00000002 Save the file.
ACTION_SAVE_AS 0x00000004 Save the file as another file.
ACTION_EDIT 0x00000008 Edit the file.
ACTION_SCREEN_CAPTURE 0x00000010 Capture screenshots of the file.
ACTION_SCREEN_SHARE 0x00000020 Share the screen of the file.
ACTION_SCREEN_RECORD 0x00000040 Record the screen on which the file is open.
ACTION_COPY 0x00000080 Copy the file.
ACTION_PRINT 0x00000100 Print the file.
ACTION_EXPORT 0x00000200 Export the file.
ACTION_PERMISSION_CHANGE 0x00000400 Modify the permissions on the file.

DLPFileAccess

Enumerates the permissions on a DLP file.

System capability: SystemCapability.Security.DataLossPrevention

Name Value Description
NO_PERMISSION 0 The user has no permission on the file.
READ_ONLY 1 The user has only the permission to read the file.
CONTENT_EDIT 2 The user has the permission to edit the file.
FULL_CONTROL 3 The user has full control on the file.

DLPPermissionInfo

Represents the permission information about a DLP file.

System capability: SystemCapability.Security.DataLossPrevention

Name Type Readable Writable Description
dlpFileAccess DLPFileAccess Yes No User permission on the DLP file, for example, read-only.
flags number Yes No Operations that can be performed on the DLP file. It is a combination of different ActionFlagTypes.

AccessedDLPFileInfo

Represents the information about a DLP file opened.

System capability: SystemCapability.Security.DataLossPrevention

Name Type Readable Writable Description
uri string Yes No URI of the DLP file.
lastOpenTime number Yes No Time when the file was last opened.

DLPSandboxInfo

Represents the DLP sandbox information.

System API: This is a system API.

System capability: SystemCapability.Security.DataLossPrevention

Name Type Readable Writable Description
appIndex number Yes No Index of the DLP sandbox application.
tokenID number Yes No Token ID of the DLP sandbox application.

DLPSandboxState

Represents the DLP sandbox identity information.

System API: This is a system API.

System capability: SystemCapability.Security.DataLossPrevention

Name Type Readable Writable Description
bundleName string Yes No Bundle name of the application.
appIndex number Yes No Index of the DLP sandbox application.

RetentionSandboxInfo

Represents the sandbox retention information.

System capability: SystemCapability.Security.DataLossPrevention

Name Type Readable Writable Description
appIndex number Yes No Index of the DLP sandbox application.
bundleName string Yes No Bundle name of the application.
docUris Array&lt;string&gt; Yes No URI list of the DLP files.

AccountType

Enumerates the types of authorized accounts.

System API: This is a system API.

System capability: SystemCapability.Security.DataLossPrevention

Name Value Description
CLOUD_ACCOUNT 1 Cloud account.
DOMAIN_ACCOUNT 2 Domain account.

AuthUser

Represents the user authorization information.

System API: This is a system API.

System capability: SystemCapability.Security.DataLossPrevention

Name Type Read Only Mandatory Description
authAccount string No Yes Account of the user who can access the DLP file.
authAccountType AccountType No Yes Type of the account.
dlpFileAccess DLPFileAccess No Yes Permission granted to the user.
permExpiryTime number No Yes Time when the authorization expires.

DLPProperty

Represents the authorization information.

System API: This is a system API.

System capability: SystemCapability.Security.DataLossPrevention

Name Type Read Only Mandatory Description
ownerAccount string No Yes Account of the owner who can set the permission.
ownerAccountID string No Yes Account ID of the owner.
ownerAccountType AccountType No Yes Account type of the owner.
authUserList Array&lt;AuthUser&gt; No No List of users who are authorized to access the DLP file. By default, this parameter is left blank.
contactAccount string No Yes Account of the contact.
offlineAccess boolean No Yes Whether the file can be accessed offline.
everyoneAccessList Array&lt;DLPFileAccess&gt; No No Permission granted to everyone. This parameter is left blank by default.

GatheringPolicyType

Enumerates the DLP sandbox gathering policy types. GATHERING allows the DLP files of the same permission type to be opened in a sandbox. For example, open different tab pages in a sandbox. NON_GATHERING allows different DLP files to be opened in different sandboxes.

System capability: SystemCapability.Security.DataLossPrevention

System API: This is a system API.

Parameters

Name Value Description
GATHERING 1 Allows the DLP files of the same permission type to be opened in a sandbox. For example, the files of the same permission type can be opened in tab pages of a window.
NON_GATHERING 2 Allows the DLP files of different permission types to be opened in different sandboxes.

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