HarmonyOS 鸿蒙Next中用户认证（人脸识别）

HarmonyOS 鸿蒙Next中用户认证（人脸识别）

1. 开启权限

ohos.permission.ACCESS_BIOMETRIC

1. 指定认证类型（UserAuthType）和认证等级（AuthTrustLevel），调用getAvailableStatus接口查询当前的设备是否支持相应的认证能力。

认证可信等级的详细介绍请参见认证可信等级划分原则。

import { BusinessError } from '@kit.BasicServicesKit';
import { userAuth } from '@kit.UserAuthenticationKit';

// 查询认证能力是否支持
try {    
    userAuth.getAvailableStatus(userAuth.UserAuthType.FACE, userAuth.AuthTrustLevel.ATL1);    
    console.info('current auth trust level is supported');
} catch (error) {
    const err: BusinessError = error as BusinessError;
    console.error(`current auth trust level is not supported. Code is ${err?.code}, message is ${err?.message}`);
}

demo(权限要开，手机要录人脸)

import { cryptoFramework } from '@kit.CryptoArchitectureKit';
import { userAuth, UserAuthIcon } from '@kit.UserAuthenticationKit';
// API version 10
import { BusinessError } from '@kit.BasicServicesKit';

@Entry
@Component
struct Index {
  rand = cryptoFramework.createRandom();
  len: number = 16;
  randData: Uint8Array = this.rand?.generateRandomSync(this.len)?.data;
  authParam: userAuth.AuthParam = {
    challenge: this.randData,
    authType: [userAuth.UserAuthType.FACE, userAuth.UserAuthType.PIN],
    authTrustLevel: userAuth.AuthTrustLevel.ATL3
  };
  widgetParam: userAuth.WidgetParam = {
    title: '请进行身份认证'
  };

  build() {
    Row() {
      Column() {
        UserAuthIcon({
          authParam: this.authParam,
          widgetParam: this.widgetParam,
          iconHeight: 200,
          iconColor: Color.Blue,
          onIconClick: () => {
            console.info('The user clicked the icon.');

            try {
              const rand = cryptoFramework.createRandom();
              const len: number = 16; // Generate a 16-byte random number.
              const randData: Uint8Array = rand?.generateRandomSync(len)?.data;
              // 设置认证参数
              const authParam: userAuth.AuthParam = {
                challenge: randData,
                authType: [userAuth.UserAuthType.PIN, userAuth.UserAuthType.FACE],
                authTrustLevel: userAuth.AuthTrustLevel.ATL3,
              };
              // 配置认证界面
              const widgetParam: userAuth.WidgetParam = {
                title: '请进行身份认证',
              };
              // 获取认证对象
              const userAuthInstance = userAuth.getUserAuthInstance(authParam, widgetParam);
              console.info('get userAuth instance success');
              // 订阅认证结果
              userAuthInstance.on('result', {
                onResult(result) {
                  console.info(`userAuthInstance callback result: ${JSON.stringify(result)}`);
                  // 可在认证结束或其他业务需要场景，取消订阅认证结果
                  userAuthInstance.off('result');
                }
              });
              console.info('auth on success');
              userAuthInstance.start();
              console.info('auth start success');
            } catch (error) {
              const err: BusinessError = error as BusinessError;
              console.error(`auth catch error. Code is ${err?.code}, message is ${err?.message}`);
            }
          },
          onAuthResult: (result: userAuth.UserAuthResult) => {
            console.info(`Get user auth result, result = ${JSON.stringify(result)}`);
          }
        })
      }
    }
  }
}