591. (Android/Java) [android 13 / target 33] mifareClassic 마이페어 A Key 키 권한 확인, sector 섹터 번호 block 읽기

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[개발 환경 설정]

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개발 툴 : AndroidStudio

 

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[소스 코드]

 

package com.example.javaproject;

import android.app.PendingIntent;
import android.nfc.NfcAdapter;
import android.nfc.Tag;
import android.nfc.tech.MifareClassic;
import android.os.Build;
import android.os.Bundle;
import android.util.Base64;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import androidx.appcompat.app.AppCompatActivity;
import java.util.Arrays;

public class A_Mifare extends AppCompatActivity {



    /**
     * // --------------------------------------------------------------------------------------
     * TODO [클래스 설명]
     * // --------------------------------------------------------------------------------------
     * 1. 인트로 로딩 화면 액티비티
     * // --------------------------------------------------------------------------------------
     * */





    /**
     * // --------------------------------------------------------------------------------------
     * TODO [빠른 로직 찾기 : 주석 로직 찾기]
     * // --------------------------------------------------------------------------------------
     * // [SEARCH FAST] : []
     * // --------------------------------------------------------------------------------------
     */





    // -----------------------------------------------------------------------------------------
    // TODO [컴포넌트 선언]
    // -----------------------------------------------------------------------------------------





    // -----------------------------------------------------------------------------------------
    // TODO [전역 변수]
    // -----------------------------------------------------------------------------------------
    private static final String ACTIVITY_NAME = "A_Mifare";

    private NfcAdapter nfcAdapter = null; // [NfcAdapter]
    private PendingIntent pendingIntent = null; // [PendingIntent]





    // -----------------------------------------------------------------------------------------
    // TODO [액티비티 onCreate]
    // -----------------------------------------------------------------------------------------
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // ===============================================================
        S_Log._D_("액티비티 수행 실시", null);
        // ===============================================================


        // ---------------------------------------------------------------
        // [타이틀 바 없애기]
        // ---------------------------------------------------------------
        C_App.setTitleBarRemove(A_Mifare.this);


        // ---------------------------------------------------------------
        // [액티비티 레이아웃 지정 실시]
        // ---------------------------------------------------------------
        setContentView(R.layout.activity_a_intro);

        // -------------------------------------
        // [로직 처리 실시]
        // -------------------------------------
        try {

            /**
             * ---------------------------------
             * [필요 퍼미션 등록]
             * ---------------------------------
             * <uses-permission android:name="android.permission.NFC"/>
             * <uses-feature android:name="android.hardware.nfc" android:required="true" />
             * ---------------------------------
             * */


            // [NFC 사용 여부 및 활성 상태 확인]
            if (C_StateCheck.getNfcState(A_Mifare.this) == true){
                S_Log._W_("NFC 활성 상태 :: NfcAdapter.getDefaultAdapter 지정", null);

                // [NFC 어댑터 지정 실시]
                nfcAdapter = NfcAdapter.getDefaultAdapter(this);

            }
            else {
                S_Log._E_("NFC 비활성 상태", null);
            }
        }
        catch (Exception e){
            e.printStackTrace();
        }


    } // TODO [메인 종료]





    // -----------------------------------------------------------------------------------------
    // TODO [액티비티 onResume]
    // -----------------------------------------------------------------------------------------
    @Override
    public void onResume(){
        // ===============================================================
        S_Log._D_("액티비티 실행 준비", null);
        // ===============================================================

        try {
            // [NFC 리더 모드 등록]
            if (nfcAdapter != null) {
                Bundle options = new Bundle();
                options.putInt(NfcAdapter.EXTRA_READER_PRESENCE_CHECK_DELAY, 250);

                nfcAdapter.enableReaderMode(this,
                        new A_Mifare().new NfcReaderClass(), // [콜백 클래스 등록]

                        NfcAdapter.FLAG_READER_NFC_A |
                                NfcAdapter.FLAG_READER_NFC_B |
                                NfcAdapter.FLAG_READER_NFC_F |
                                NfcAdapter.FLAG_READER_NFC_V |
                                NfcAdapter.FLAG_READER_NFC_BARCODE |
                                NfcAdapter.FLAG_READER_NO_PLATFORM_SOUNDS,
                        options);
            }
        }
        catch (Exception e){
            e.printStackTrace();
        }
        super.onResume();
    }




    // -----------------------------------------------------------------------------------------
    // TODO [액티비티 onPause]
    // -----------------------------------------------------------------------------------------
    @Override
    public void onPause(){
        super.onPause();
        // ===============================================================
        S_Log._E_("액티비티 정지 상태", null);
        // ===============================================================

        try {
            // [NFC 리더 모드 해제]
            if (nfcAdapter != null) {
                nfcAdapter.disableReaderMode(this);
            }
        }
        catch (Exception e){
            e.printStackTrace();
        }
    }




    // -----------------------------------------------------------------------------------------
    // TODO [액티비티 onDestroy]
    // -----------------------------------------------------------------------------------------
    @Override
    public void onDestroy(){
        super.onDestroy();
        // ===============================================================
        S_Log._E_("액티비티 종료 상태", null);
        // ===============================================================
    }





    // -----------------------------------------------------------------------------------------
    // TODO [모바일 키 이벤트 발생 체크 부분]
    // -----------------------------------------------------------------------------------------
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // [모바일 디바이스의 뒤로가기 키 이벤트가 발생한 경우]
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            Log.i("---","---");
            Log.w("//===========//","================================================");
            Log.i("","\n"+"["+String.valueOf(ACTIVITY_NAME)+" >> onKeyDown() :: 백버튼 터치시 뒤로 가기 이벤트 발생]");
            Log.w("//===========//","================================================");
            Log.i("---","---");

            // ------------------------------------
            // [액티비티 종료 실시]
            finish();
            overridePendingTransition(0, 0);
            // ------------------------------------
        }
        return true;
    }





    // -----------------------------------------------------------------------------------------
    // TODO [내부 클래스 생성 : 콜백 등록]
    // -----------------------------------------------------------------------------------------
    class NfcReaderClass implements NfcAdapter.ReaderCallback {

        @Override
        public void onTagDiscovered(Tag tag) {
            // ===============================================================
            S_Log._D_("onTagDiscovered :: 이벤트 감지", null);
            // ===============================================================

            try {
                if (tag != null){

                    // [print info]
                    byte[] tagId = tag.getId();
                    String hexTag = C_Encryption.byteToHex(tagId);
                    // ===============================================================
                    S_Log._W_("tagId 정보 확인", new String[]{
                            "Byte :: " + Arrays.toString(tagId),
                            "Hex :: " + hexTag
                    });
                    // ===============================================================


                    // [MifareClassic 연결]
                    MifareClassic mifareClassic = MifareClassic.get(tag);
                    mifareClassic.connect();


                    // [섹터 값 읽기]
                    boolean auth = false;
                    int bCount = 0;
                    int bIndex = 0;
                    byte[] bData = null;

                    int sectorCount = mifareClassic.getSectorCount();

                    if (sectorCount >= 0){

                        for (int i=0; i<sectorCount; i++){

                            // [권한 체크]
                            auth = mifareClassic.authenticateSectorWithKeyA(i, MifareClassic.KEY_DEFAULT);

                            if(auth){ // [권한 확인]

                                bCount = mifareClassic.getBlockCountInSector(i);
                                bIndex = 0;

                                for(int j = 0; j < bCount; j++){
                                    bIndex = mifareClassic.sectorToBlock(j);

                                    try {
                                        bData = mifareClassic.readBlock(bIndex);
                                    }
                                    catch (Exception e){
                                        bData = null;
                                    }

                                    if (bData != null && bData.length>0){

                                        String bHex = C_Encryption.byteToHex(bData);

                                        S_Log._W_("섹터 블럭 정보 확인", new String[]{
                                                "authenticateSectorWithKeyA :: " + String.valueOf(i),
                                                "blockIndex :: " + String.valueOf(bIndex),
                                                "blockData :: " + String.valueOf(Arrays.toString(bData)),
                                                "blockHex :: " + String.valueOf(bHex)
                                        });
                                    }

                                }

                            }

                        }

                    }

                    
                    // [마이페어 연결 종료]
                    mifareClassic.close();
                }
                else {
                    Log.i("---","---");
                    Log.e("//===========//","================================================");
                    Log.i("","\n"+"["+String.valueOf(ACTIVITY_NAME)+" >> onTagDiscovered() :: NFC TAG IS NULL]");
                    Log.e("//===========//","================================================");
                    Log.i("---","---");
                }
            }
            catch (Exception e){
                e.printStackTrace();
            }
        }
    }


} // TODO [클래스 종료]

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[결과 출력]

 

W///===========//: ================================================
I/: [LOG :: CLASS PLACE :: com.example.javaproject.A_Mifare$NfcReaderClass.onTagDiscovered(A_Mifare.java:290)]
I/: ----------------------------------------------------
I/: [LOG :: DESCRIPTION :: 섹터 블럭 정보 확인]
I/: ----------------------------------------------------
I/: [LOG :: authenticateSectorWithKeyA :: 15]
I/: ----------------------------------------------------
I/: [LOG :: blockIndex :: 4]
I/: ----------------------------------------------------
I/: [LOG :: blockData :: [16, -78]]
I/: ----------------------------------------------------
I/: [LOG :: blockHex :: 0x10 0xb2]
W///===========//: ================================================

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