卡的PSE不是它应该是的

Question

所以，我有一个非接触式万事达卡和一个Visa paywave手机。 我使用非接触式HID Omnikey 5427 CK。

这是我的代码：`

static boolean cardReading = true; 

public static void main(String[] args) throws CardException, UnsupportedEncodingException { 

    while (cardReading == true) { 

    try { 
    TerminalFactory factory = TerminalFactory.getDefault(); 
    List<CardTerminal> terminals = factory.terminals().list(); 
    CardTerminal terminal = terminals.get(0); 

    if (!terminal.isCardPresent()) { 

     continue; 

    } 

    System.out.println("Terminals: " + terminals); 
    System.out.println("Used terminal: " + terminal); 

    Card card = terminal.connect("T=0"); 
    System.out.println("\n\nInserted card: " + card); 
    CardChannel channel = card.getBasicChannel(); 

    String pse = "00A404000E325041592E5359532E444446303100"; 
    CommandAPDU apdu = new CommandAPDU(pse.getBytes()); 
    ResponseAPDU r = channel.transmit(apdu); 

    System.out.println("Response: " + toHex(r.getData().toString()) + " " + r); 
    System.out.println("ADPU: " + toHex(apdu.getBytes().toString()) + " " + r.getSW() + " " + r.getSW1() + " " + r.getSW2() + " " + r.getNr()); 

    apdu = new CommandAPDU((byte)0x00, (byte)0xB2, (byte)0x01, (byte)0x0C, (byte)0x00); 
    r = channel.transmit(apdu); 

    cardReading = false; 
    Toolkit.getDefaultToolkit().beep(); 

    System.out.println("Terminals: " + terminals); 
    System.out.println("Used terminal: " + terminal); 
    System.out.println("\n\nInserted card: " + card); 
    System.out.println("Response: " + toHex(r.getData().toString()) + " " + r); 
    System.out.println("ADPU: " + toHex(apdu.getBytes().toString()) + " " + r.getSW() + " " + r.getSW1() + " " + r.getSW2() + " " + r.getNr()); 



    System.exit(1); 

    } catch(Exception e) { 

     continue; 

    } 

    } 

} 

public static byte[] hexStringToByteArray(String s) { 
    int len = s.length(); 
    byte[] data = new byte[len/2]; 
    for (int i = 0; i < len; i += 2) { 
     data[i/2] = (byte) ((Character.digit(s.charAt(i), 16) << 4) 
          + Character.digit(s.charAt(i+1), 16)); 
    } 
    return data; 
} 

public static String toHex(String arg) { 
    return String.format("%040x", new BigInteger(1, arg.getBytes())); 
} 

`

所以输出是：

Terminals: [PC/SC terminal HID OMNIKEY 5427 CK 0] 
Used terminal: PC/SC terminal HID OMNIKEY 5427 CK 0 


Inserted card: PC/SC card in HID OMNIKEY 5427 CK 0, protocol T=0, state OK 
Response: 0000000000000000005b42403163343630306630 ResponseAPDU: 65 bytes, SW=9000 
ADPU: 000000000000000000005b424035623665663230 36864 144 0 63 
Terminals: [PC/SC terminal HID OMNIKEY 5427 CK 0] 
Used terminal: PC/SC terminal HID OMNIKEY 5427 CK 0 


Inserted card: PC/SC card in HID OMNIKEY 5427 CK 0, protocol T=0, state OK 
Response: 0000000000000000005b42403565616235383039 ResponseAPDU: 14 bytes, SW=9000 
ADPU: 0000000000000000005b42403433323065373664 36864 144 0 12 

我不明白为什么是响应0000000000000000005b42403565616235383039 ... 请帮助。

问候，弗拉德。

Answer 1

正如Michael Roland所说 - 您对十六进制字符串的处理是错误的。

元错误1： '字节[]的toString（）' 使用

r.getData().toString() 

的byte[].toString使用默认Object.toString()实现返回该类名，后跟@和Object.hashCode()的值（例如"[B@312b1dae"） - 这不是你想要进一步处理的。

您可以使用Arrays.toString()方法（不执行十六进制转储）或any other method。

元错误2：使用“String.getBytes（）”

String pse = "00A404000E325041592E5359532E444446303100"; 
CommandAPDU apdu = new CommandAPDU(pse.getBytes()); 

不产生所需的APDU对象作为String.getBytes()不执行进制转换的方法，但是在该平台的一个字符集转换默认字符集，例如："1234".getBytes()给出{ 0x31, 0x32, 0x33, 0x34 }（而不是您所期望的{ 0x12, 0x34 }）。

下面是执行一个简单的代码示例（几乎）相同的代码：

package test.java.so; 

import java.util.List; 

import javax.smartcardio.Card; 
import javax.smartcardio.CardChannel; 
import javax.smartcardio.CardTerminal; 
import javax.smartcardio.CommandAPDU; 
import javax.smartcardio.ResponseAPDU; 
import javax.smartcardio.TerminalFactory; 

import org.apache.commons.codec.binary.Hex; 

@SuppressWarnings("restriction") 
public class So39543402 { 

    public static void main(String[] args) throws Exception { 
       TerminalFactory factory = TerminalFactory.getDefault(); 
       List<CardTerminal> terminals = factory.terminals().list(); 
       CardTerminal terminal = terminals.get(0); 

       Card card = terminal.connect("*"); 
       CardChannel channel = card.getBasicChannel(); 

       String pse = "00A404000E325041592E5359532E444446303100"; 
       CommandAPDU apdu = new CommandAPDU(Hex.decodeHex(pse.toCharArray())); 
       exchangeApdu(channel, apdu); 

       apdu = new CommandAPDU(0x00, 0xB2, 0x01, 0x0C, 256); 
       exchangeApdu(channel, apdu); 
    } 

    private static ResponseAPDU exchangeApdu(CardChannel channel, CommandAPDU apdu) throws javax.smartcardio.CardException { 
     System.out.println("APDU: " + Hex.encodeHexString(apdu.getBytes())); 
     ResponseAPDU r = channel.transmit(apdu); 
     System.out.println("Response: " + Hex.encodeHexString(r.getBytes())); 
     return r; 
    } 

} 

请注意一些有趣的部分：

• 此代码使用Apache Commons Codec为十六进制的转换

• 参数"*"用于CardTerminal.connect()比总是reque更通用蜇T=0协议

• 您READ RECORD APDU进行了修改，预计256个字节的响应数据 - this is how this particular constructor works（您的代码会产生一个ISO情况下，1命令APDU这可能不是你想要的）

，还应注意：

• 不使用String.getBytes()方法不带参数（即使你想单字符转换为字节）。总是指定所需的字符集（例如“US-ASCII”，“UTF-8”）

祝你好运！