problem with code

[bushKape]

I perebroboval all possible verification code, and I do not like does not come out to make it work, please see maybe you'll see nothing in the code is correct. And the main question is whether I have the pin code (1111)?

Code: Select all

package online;
import javacard.framework.*;
public class online extends Applet {
final static byte WALLET_CLA = (byte)0xA0;
final static byte VERIFY = (byte) 0x20;
final static byte CREDIT = (byte) 0x30;
final static byte DEBIT = (byte) 0x40;
final static byte GET_BALANCE = (byte) 0x50;
final static short MAX_BALANCE = 10000;
final static short MAX_TRANSACTION_AMOUNT = 5000;
final static byte PIN_TRY_LIMIT =(byte)0x03;
final static byte MAX_PIN_SIZE =(byte)0x08;
final static short SW_VERIFICATION_FAILED = 0x6300;
final static short SW_PIN_VERIFICATION_REQUIRED = 0x6301;
final static short SW_INVALID_TRANSACTION_AMOUNT = 0x6A83;
final static short SW_EXCEED_MAXIMUM_BALANCE = 0x6A84;
final static short SW_NEGATIVE_BALANCE = 0x6A85;
final static byte GET_ACCOUNT_INFO = (byte) 41;
final static byte HASH_VALUE_LENGTH = (byte) 8;
final static byte NAME = (byte) 20;
final static byte ACCOUNT_NUMBER = (byte) 9;
final static byte EXPIRATION_DATE = (byte) 4;
private static byte[] name = {(byte)0x44, (byte)0x30, (byte)0x35, (byte)0x31, (byte)0x30, (byte)0x36, (byte)0x30, (byte)0x31, (byte)0x32};
private static byte[] account_number = {(byte)0x44, (byte)0x30, (byte)0x35, (byte)0x31, (byte)0x30, (byte)0x36, (byte)0x30, (byte)0x31, (byte)0x32};
private static byte[] expiration_date = {(byte)0x44, (byte)0x30, (byte)0x35, (byte)0x31, (byte)0x30, (byte)0x36, (byte)0x30, (byte)0x31, (byte)0x32};
OwnerPIN pin;
short balance;
/**
* called by the JCRE to create an applet instance
     * @param bArray
     * @param bOffset
     * @param bLength
*/
public static void install(byte[] bArray, short bOffset, byte bLength) {
    new online(bArray, bOffset, bLength);
}
private online (byte[] bArray, short bOffset, byte bLength){
pin = new OwnerPIN(PIN_TRY_LIMIT, MAX_PIN_SIZE);
bArray[0] = '1';
bArray[1] = '1';
bArray[2] = '1';
bArray[3] = '1';
bOffset = 0;
bLength = 4;
pin.update(bArray, bOffset, bLength);
register();
}
    /**
     *
     * @return
     */
public boolean select() {
 if (pin.getTriesRemaining() == 0)
 return false;
return true;
}
public void deselect() {
    pin.reset();
}

    /**
     *
     * @param apdu
     */
public void process(APDU apdu) {
    byte[] buffer = apdu.getBuffer();
    if (selectingApplet())
return;
    if (buffer[ISO7816.OFFSET_CLA] != WALLET_CLA)
ISOException.throwIt(ISO7816.SW_CLA_NOT_SUPPORTED);
    switch (buffer[ISO7816.OFFSET_INS]) {
case GET_BALANCE: getBalance(apdu); return;
case DEBIT: debit(apdu); return;
case CREDIT: credit(apdu); return;
case VERIFY: verify(apdu); return;
case GET_ACCOUNT_INFO: get_account_info(apdu); return;
default: ISOException.throwIt
(ISO7816.SW_INS_NOT_SUPPORTED);
}
}
private void credit(APDU apdu) {
   if (!pin.isValidated())
ISOException.throwIt(SW_PIN_VERIFICATION_REQUIRED);
 byte[] buffer = apdu.getBuffer();
byte numBytes = buffer[ISO7816.OFFSET_LC];
byte byteRead = (byte)(apdu.setIncomingAndReceive());
if (( numBytes != 1 ) || (byteRead != 1))
ISOException.throwIt(ISO7816.SW_WRONG_LENGTH);
 byte creditAmount = buffer[ISO7816.OFFSET_CDATA];
if ((creditAmount>MAX_TRANSACTION_AMOUNT)
|| ( creditAmount < 0 ))
ISOException.throwIt(SW_INVALID_TRANSACTION_AMOUNT);
 if ((creditAmount > MAX_TRANSACTION_AMOUNT)
|| (creditAmount<0))
ISOException.throwIt(SW_INVALID_TRANSACTION_AMOUNT);
 balance=(short)(balance+creditAmount);
}
private void debit(APDU apdu) {
    if (! pin.isValidated())
ISOException.throwIt(SW_PIN_VERIFICATION_REQUIRED);
 byte[] buffer = apdu.getBuffer();
byte numBytes = (byte)(buffer[ISO7816.OFFSET_LC]);
byte byteRead = (byte)(apdu.setIncomingAndReceive());
if (( numBytes != 1 ) || (byteRead != 1))
ISOException.throwIt(ISO7816.SW_WRONG_LENGTH);
 byte debitAmount = buffer[ISO7816.OFFSET_CDATA];
if (( debitAmount > MAX_TRANSACTION_AMOUNT)
        || ( debitAmount < 0 ))
ISOException.throwIt(SW_INVALID_TRANSACTION_AMOUNT);
 if ((short)( balance - debitAmount )< (short)0)
ISOException.throwIt(SW_NEGATIVE_BALANCE);
 balance = (short) (balance - debitAmount);
}
private void getBalance(APDU apdu) {
byte[] buffer = apdu.getBuffer();
short le = apdu.setOutgoing();
apdu.setOutgoingLength((byte)2);
Util.setShort(buffer, (short)0, balance);
apdu.sendBytes((short)0, (short)2);
}
private void verify(APDU apdu) {
byte[] buffer = apdu.getBuffer();
byte byteRead = (byte)(apdu.setIncomingAndReceive());
if (pin.check(buffer, ISO7816.OFFSET_CDATA,byteRead)
== false)
ISOException.throwIt(SW_VERIFICATION_FAILED);
}
private void get_account_info(APDU apdu) {
short total_bytes = (short) 41;
short le = apdu.setOutgoing();
apdu.setOutgoingLength(total_bytes);
apdu.sendBytesLong(name, (short)0, (short) name.length);
apdu.sendBytesLong(account_number, (short)0, (short)account_number.length);
apdu.sendBytesLong(expiration_date, (short)0,(short)expiration_date.length);
apdu.sendBytes((short)0, HASH_VALUE_LENGTH);
return;
}
} 

[UNKNwYSHSA]

I had test your code, there have no problem, following are the APDUs:

Code: Select all

// Select your applet instance first;

// Notice: CLA shall be 0xA0;
// Verify, PIN is '1111', HEX value is { 0x31, 0x31, 0x31, 0x31 };
>> /send A02000000431313131
>> A0 20 00 00 04 31 31 31 31
<< 90 00

// Credit: 0x10;
>> /send A03000000110
>> A0 30 00 00 01 10
<< 90 00

// Get Balance: balance is 0x10;
>> /send A050000002
>> A0 50 00 00 02
<< 00 10 90 00

// Debit: 0x07;
>> /send A04000000107
>> A0 40 00 00 01 07
<< 90 00

// Get balance: balance is 0x09;
>> /send A050000002
>> A0 50 00 00 02
<< 00 09 90 00

[bushKape]

I had test your code, there have no problem, following are the APDUs:

Code: Select all

// Select your applet instance first;

// Notice: CLA shall be 0xA0;
// Verify, PIN is '1111', HEX value is { 0x31, 0x31, 0x31, 0x31 };
>> /send A02000000431313131
>> A0 20 00 00 04 31 31 31 31
<< 90 00

// Credit: 0x10;
>> /send A03000000110
>> A0 30 00 00 01 10
<< 90 00

// Get Balance: balance is 0x10;
>> /send A050000002
>> A0 50 00 00 02
<< 00 10 90 00

// Debit: 0x07;
>> /send A04000000107
>> A0 40 00 00 01 07
<< 90 00

// Get balance: balance is 0x09;
>> /send A050000002
>> A0 50 00 00 02
<< 00 09 90 00

If the problem is not in the code, it seems that I do not to install the applet on the card. during installation via the "Pyapdu tool" I choose "Security Domaine, DAP verivication" and get back 6a80 error. as if I set through the GP is set to all privileges except those. As a result, no matter what I did, when I insert the card into the emulator an error is "no application"
In advance thank you very much for any help!
By the way, I have the card nxp jcop j2a and acr38u-h1
is it possible that this is happening because in my code is not cryptography?

[UNKNwYSHSA]

Install the applet with no privilege checked, the applet will be installed without error.