app-starlock/lib/blue/io_protocol/io_getPrivateKey.dart

import 'dart:convert';

import 'package:crypto/crypto.dart' as crypto;
import 'package:star_lock/blue/blue_manage.dart';
import 'package:star_lock/blue/sm4Encipher/sm4.dart';
import 'package:star_lock/tools/dateTool.dart';

import '../io_reply.dart';
import '../io_sender.dart';
import '../io_tool/io_tool.dart';
import '../io_type.dart';

List<int> publicKeyDataList = <int>[];

class GetPrivateKeyCommand extends SenderProtocol {
  GetPrivateKeyCommand(
      {this.lockID,
      this.keyID,
      this.authUserID,
      this.nowTime,
      this.needAuthor,
      this.publicKeyData})
      : super(CommandType.getLockPrivateKey);
  String? lockID;
  String? keyID; // 钥匙ID
  String? authUserID; // 钥匙授权人ID
  int? nowTime;
  int? needAuthor;
  List<int>? publicKeyData;

  @override
  String toString() {
    return 'GetPrivateKeyCommand{lockID: $lockID, keyID: $keyID, '
        'authUserID: $authUserID, nowTime: ${DateTool().dateIntToYMDHNString(nowTime)}, '
        'needAuthor: $needAuthor, publicKeyData: $publicKeyData}';
  }

  @override
  List<int> messageDetail() {
    publicKeyDataList = publicKeyData!;
    List<int> data = <int>[];
    List<int> ebcData = <int>[];

    // 指令类型
    final int type = commandType!.typeValue;
    final double typeDouble = type / 256;
    final int type1 = typeDouble.toInt();
    final int type2 = type % 256;
    data.add(type1);
    data.add(type2);

    // 锁id
    final int lockIDLength = utf8.encode(lockID!).length;
    data.addAll(utf8.encode(lockID!));
    data = getFixedLengthList(data, 40 - lockIDLength);

    //KeyID  40
    final int keyIDLength = utf8.encode(keyID!).length;
    data.addAll(utf8.encode(keyID!));
    data = getFixedLengthList(data, 40 - keyIDLength);

    //authUserID  20
    final int authUserIDLength = utf8.encode(authUserID!).length;
    data.addAll(utf8.encode(authUserID!));
    data = getFixedLengthList(data, 20 - authUserIDLength);

    //NowTime  4
    data.add((nowTime! & 0xff000000) >> 24);
    data.add((nowTime! & 0xff0000) >> 16);
    data.add((nowTime! & 0xff00) >> 8);
    data.add(nowTime! & 0xff);

    if (needAuthor == 0) {
      data.add(0);
    } else {
      final List<int> authCodeData = <int>[];

      //authUserID
      authCodeData.addAll(utf8.encode(authUserID!));

      //KeyID
      authCodeData.addAll(utf8.encode(keyID!));

      //NowTime  4
      authCodeData.add((nowTime! & 0xff000000) >> 24);
      authCodeData.add((nowTime! & 0xff0000) >> 16);
      authCodeData.add((nowTime! & 0xff00) >> 8);
      authCodeData.add(nowTime! & 0xff);

      authCodeData.addAll(publicKeyData!);

      // 把KeyID、authUserID、时间戳、公钥通过md5加密之后就是authCode
      final crypto.Digest authCode = crypto.md5.convert(authCodeData);

      data.add(authCode.bytes.length);
      data.addAll(authCode.bytes);
    }

    if ((data.length % 16) != 0) {
      final int add = 16 - data.length % 16;
      for (int i = 0; i < add; i++) {
        data.add(0);
      }
    }

    printLog(data);
    // 拿到数据之后通过LockId进行SM4 ECB加密 key:544d485f633335373034383064613864
    ebcData = SM4.encrypt(data, key: utf8.encode(BlueManage().connectDeviceName), mode: SM4CryptoMode.ECB);

    return ebcData;
  }
}

class GetPrivateKeyReply extends Reply {
  GetPrivateKeyReply.parseData(CommandType commandType, List<int> dataDetail)
      : super.parseData(commandType, dataDetail) {
    data = dataDetail.sublist(2);
    status = data[0];
  }
}