安全单元访问开发指南

import secureElement from '@ohos.secureElement';
import { BusinessError } from '@ohos.base';
import AbilityConstant from '@ohos.app.ability.AbilityConstant';


let seService : secureElement.SEService;
let seReaders : secureElement.Reader[];
let seSession : secureElement.Session;
let seChannel : secureElement.Channel;
let aidArray : number[] = [0xA0, 0x00, 0x00, 0x00, 0x03, 0x10, 0x10];
let p2 : number = 0x00;

export default class EntryAbility extends UIAbility {
  onCreate(want: Want, launchParam: AbilityConstant.LaunchParam) {
    hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onCreate');

    // 判断设备是否支持安全单元能力
    if (!canIUse("SystemCapability.Communication.SecureElement")) {
      hilog.error(0x0000, 'testTag', 'secure element unavailable.');
      return;
    }

    // get the service
    try {
      seService = secureElement.newSEService("serviceState", (state) => {
        hilog.info(0x0000, 'testTag', 'se service state = %{public}s', JSON.stringify(state));
      });
    } catch (error) {
      hilog.error(0x0000, 'testTag', 'newSEService error %{public}s', JSON.stringify(error));
    }
    if (seService == undefined || !seService.isConnected()) {
      hilog.error(0x0000, 'testTag', 'secure element service disconnected.');
      return;
    }

    // get readers
    try {
      seReaders = seService.getReaders();
    } catch (error) {
      hilog.error(0x0000, 'testTag', 'getReaders error %{public}s', JSON.stringify(error));
    }
    if (seReaders == undefined || seReaders.length == 0) {
      hilog.error(0x0000, 'testTag', 'no valid reader found.');
      return;
    }

    // get session
    try {
      let reader = seReaders[0]; // change it to the selected reader, ese or sim.
      seSession = reader.openSession();
    } catch (error) {
      hilog.error(0x0000, 'testTag', 'openSession error %{public}s', JSON.stringify(error));
    }
    if (seSession == undefined) {
      hilog.error(0x0000, 'testTag', 'seSession invalid.');
      return;
    }

    // get channel
    try {
      // change the aid value for open logical channel.
      seSession.openLogicalChannel(aidArray, p2, (error, data) => {
        if (error) {
          hilog.error(0x0000, 'testTag', 'openLogicalChannel error %{public}s', JSON.stringify(error));
        } else {
          seChannel = data;
        }
      });
    } catch (exception) {
      hilog.error(0x0000, 'testTag', 'openLogicalChannel exception %{public}s', JSON.stringify(exception));
    }
    if (seChannel == undefined) {
      hilog.error(0x0000, 'testTag', 'seChannel invalid.');
      return;
    }

    // transmit data
    let cmdData = [0x01, 0x02, 0x03, 0x04]; // please change the raw data to be correct.
    try {
      seChannel.transmit(cmdData).then((response) => {
        hilog.info(0x0000, 'testTag', 'seChannel.transmit() response = %{public}s.', JSON.stringify(response));
      }).catch((error : BusinessError) => {
        hilog.error(0x0000, 'testTag', 'seChannel.transmit() error = %{public}s.', JSON.stringify(error));
      });
    } catch (exception) {
      hilog.error(0x0000, 'testTag', 'seChannel.transmit() exception = %{public}s.', JSON.stringify(exception));
    }

    // close channel. must make sure the channel is closed at last.
    try {
      seChannel.close();
    } catch (exception) {
      hilog.error(0x0000, 'testTag', 'seChannel.close() exception = %{public}s.', JSON.stringify(exception));
    }
  }
}