harmony 鸿蒙@ohos.deviceAttest (Device Attestation)

2023-06-24
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@ohos.deviceAttest (Device Attestation)

The deviceAttest module provides attestation of devices in OpenHarmony by comparing the device information with that stored in the cloud. You can use the APIs provided by the deviceAttest module to obtain the device attestation result.

NOTE

The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.

The APIs provided by this module are system APIs.

Modules to Import

import deviceAttest from '@ohos.deviceAttest';

deviceAttest.getAttestStatus

getAttestStatus(callback: AsyncCallback<AttestResultInfo>) : void

Obtains details about the device attestation result from the cloud. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.XTS.DeviceAttest

Parameters

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

Error codes

ID	Error Message
20000001	system service exception.

Example

import base from '@ohos.base';

try {
    deviceAttest.getAttestStatus((error: base.BusinessError, value: deviceAttest.AttestResultInfo) => {
    if (typeof error != 'undefined') {
        console.info("error code:" + error.code + " message:" + error.message);
    } else {
        console.info("auth:" + value.authResult + " software:" + value.softwareResult + " ticket:" + value.ticket);
        console.info("versionIdResult:" + value.softwareResultDetail[0],
        " patchlevelResult:" + value.softwareResultDetail[1],
        " roothashResult:" + value.softwareResultDetail[2],
        " PCIDResult:" + value.softwareResultDetail[3],
        " reserver:" + value.softwareResultDetail[4]);
    }
    })
} catch (error) {
    let code: number = (error as base.BusinessError).code;
    let message: string = (error as base.BusinessError).message;
    console.info("error code:" + code + " message:" + message);
}

deviceAttest.getAttestStatus

getAttestStatus() : Promise<AttestResultInfo>

Obtains details about the device attestation result from the cloud. This API uses a promise to return the result.

System capability: SystemCapability.XTS.DeviceAttest

Return value

Type	Description
Promise<AttestResultInfo>	Promise used to return the device attestation information obtained.

Error codes

ID	Error Message
20000001	system service exception.

Example

import base from '@ohos.base';

try {
    deviceAttest.getAttestStatus().then((value: deviceAttest.AttestResultInfo) => {
    console.info("auth:" + value.authResult + " software:" + value.softwareResult + " ticket:" + value.ticket);
    console.info("versionIdResult:" + value.softwareResultDetail[0],
        " patchlevelResult:" + value.softwareResultDetail[1],
        " roothashResult:" + value.softwareResultDetail[2],
        " PCIDResult:" + value.softwareResultDetail[3],
        " reserver:" + value.softwareResultDetail[4]);
    }).catch((error: base.BusinessError) => {
        console.info("error code:" + error.code + " message:" + error.message);
    });
} catch (error) {
    let code: number = (error as base.BusinessError).code;
    let message: string = (error as base.BusinessError).message;
    console.info("error code:" + code + " message:" + message);
}

deviceAttest.getAttestStatusSync

getAttestStatusSync() : AttestResultInfo

Obtains details about the device attestation result from the cloud synchronously.

System capability: SystemCapability.XTS.DeviceAttest

Return value

Type	Description
AttestResultInfo	Returns the device attestation information obtained.

Error codes

ID	Error Message
20000001	system service exception.

Example

import base from '@ohos.base';

try {
    let value: deviceAttest.AttestResultInfo = deviceAttest.getAttestStatusSync();
    console.info("auth:" + value.authResult + " software:" + value.softwareResult + " ticket:" + value.ticket);
    console.info("versionIdResult:" + value.softwareResultDetail[0],
    " patchlevelResult:" + value.softwareResultDetail[1],
    " roothashResult:" + value.softwareResultDetail[2],
    " PCIDResult:" + value.softwareResultDetail[3],
    " reserver:" + value.softwareResultDetail[4]);
} catch (error) {
    let code: number = (error as base.BusinessError).code;
    let message: string = (error as base.BusinessError).message;
    console.info("error code:" + code + " message:" + message);
}

AttestResultInfo

Defines the device attestation result information.

System capability: SystemCapability.XTS.DeviceAttest

Name	Type	Readable	Writable	Description
authResult	number	Yes	No	Device hardware attestation result.
softwareResult	number	Yes	No	Device software attestation result.
softwareResultDetail	Array<number>	Yes	No	Detailed information about the device software attestation result. - softwareResultDetail[0]: version ID attestation result. - softwareResultDetail[1]: attestation result of the security patch label. - softwareResultDetail[2]: version hash attestation result. - softwareResultDetail[3]: attestation result of the system capability set. - softwareResultDetail[4]: reserved.
ticket	string	Yes	No	Soft certificate delivered by the cloud. If the device hardware attestation is successful, a value is returned. If the attestation fails, this parameter is empty.

NOTE

The attestation result of device hardware and software information can be any of the following:

-2: No attestation is performed.

-1: The attestation fails.

0: The attestation is successful.