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

// 转移智能锁
import 'dart:convert';

import 'package:crypto/crypto.dart' as crypto;

import '../io_reply.dart';
import '../io_sender.dart';
import '../io_tool/io_tool.dart';
import '../io_type.dart';
import '../sm4Encipher/sm4.dart';

class TransferSmartLockCommand extends SenderProtocol {
  TransferSmartLockCommand({
    this.lockID,
    this.userID,
    this.keyID,
    this.token,
    this.needAuthor,
    this.publicKey,
    this.privateKey,
  }) : super(CommandType.transferSmartLock);

  String? lockID;
  String? userID;
  String? keyID;
  List<int>? publicKey;
  List<int>? privateKey;
  List<int>? token;
  int? needAuthor;


  @override
  String toString() {
    return 'TransferSmartLockCommand{lockID: $lockID, userID: $userID, '
        'keyID: $keyID, publicKey: $publicKey, privateKey: $privateKey, '
        'token: $token, needAuthor: $needAuthor}';
  }

  @override
  List<int> messageDetail() {
    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 40
    final int lockIDLength = utf8.encode(lockID!).length;
    data.addAll(utf8.encode(lockID!));
    data = getFixedLengthList(data, 40 - lockIDLength);

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

    // token 长度4  首次请求 Token 填 0，如果锁需要鉴权 操作者身份，则会分配动态口令并在应答消息中返回，二次请求时带上。 当token失效或者第一次发送的时候token为0
    data.addAll(token!);

    if(needAuthor == 0){
      //AuthCodeLen  1
      data.add(0);
    } else {
      final List<int> authCodeData = <int>[];

      //userID
      authCodeData.addAll(utf8.encode(lockID!));

      //token 4 首次请求 Token 填 0，如果锁需要鉴权操作者身份，则会分配动态口令并在应答消息中返回，二次请求时带上。
      authCodeData.addAll(token!);

      authCodeData.addAll(publicKey!);

      // 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: privateKey, mode: SM4CryptoMode.ECB);
    return ebcData;
  }
}

class TransferSmartLockReply extends Reply {
  TransferSmartLockReply.parseData(CommandType commandType, List<int> dataDetail)
      : super.parseData(commandType, dataDetail) {
    data = dataDetail;
    final int status = data[6];
    errorWithStstus(status);
  }
}