堆栈内存溢出
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SELECT APDU不能正常工作

[英]SELECT APDU doesn't work fine

 原文  2015-02-21 07:18:31  9   1    java/ javacard

问题描述

我创建了一个带有两个小程序的包（AID = 0102030405 ）。

这是第一bArray程序（AID = 01020304050202020202 ）的程序，该程序将bArray内容存储到静态文件中并以处理方法将其返回： 

package processMethodArguments;

import javacard.framework.APDU;
import javacard.framework.Applet;
import javacard.framework.ISOException;
import javacard.framework.Util;

public class ArgumentReturner extends Applet {
//this is my static field that I want store bArray (the install method argument) in it.
    public static byte[] theArray={(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff,(byte)0xff};
    public static short arrayLength=(short)0xFF;

    private ArgumentReturner() {
    }

    public static void install(byte bArray[], short bOffset, byte bLength)
            throws ISOException {

        new ArgumentReturner().register();

        //Storing bArray in theArray.
        ArgumentReturner.arrayLength=(short)bArray.length;
        Util.arrayCopyNonAtomic(bArray, (short)0,ArgumentReturner.theArray , (short) 0, ArgumentReturner.arrayLength);    


    }

    public void process(APDU apdu) throws ISOException {
        //returning theArray (=bArray) in response of any command.
        byte[] buffer=apdu.getBuffer();
        Util.arrayCopyNonAtomic(ArgumentReturner.theArray, (short)0,buffer , (short) 0, ArgumentReturner.arrayLength); 
        apdu.setOutgoingAndSend((short)0, (short)255);
    }

}

这是第二010203040502程序（AID = 010203040502 ）的程序，什么都不做： 

package processMethodArguments;

import javacard.framework.APDU;
import javacard.framework.Applet;
import javacard.framework.ISOException;

public class SecondApplet extends Applet {

    private SecondApplet() {
    }

    public static void install(byte bArray[], short bOffset, byte bLength)
            throws ISOException {
        new SecondApplet().register();
    }

    public void process(APDU arg0) throws ISOException {
        // Nothing to do. So in reception of any command, it must return only 0x9000

    }

}

我已成功将此转换包安装在我的卡上： 

GP: gp -install D:\bArrayAccessibility\processMethodArguments.cap

GP: gp -list
AID: A000000151000000 (|....Q...|)
     ISD OP_READY: Security Domain, Card lock, Card terminate, Default selected,
 CVM (PIN) management

AID: 01020304050202020202 (|..........|)
     App SELECTABLE: (none)

AID: A0000001515350 (|....QSP|)
     ExM LOADED: (none)
     A000000151535041 (|....QSPA|)

AID: 0102030405 (|.....|)
     ExM LOADED: (none)
     01020304050202020202 (|..........|)
     010203040502 (|......|)


GP: gp -create 010203040502 -package 0102030405 -applet 010203040502

GP: gp -list
AID: A000000151000000 (|....Q...|)
     ISD OP_READY: Security Domain, Card lock, Card terminate, Default selected,
 CVM (PIN) management

AID: 01020304050202020202 (|..........|)
     App SELECTABLE: (none)

AID: 010203040502 (|......|)
     App SELECTABLE: (none)

AID: A0000001515350 (|....QSP|)
     ExM LOADED: (none)
     A000000151535041 (|....QSPA|)

AID: 0102030405 (|.....|)
     ExM LOADED: (none)
     01020304050202020202 (|..........|)
     010203040502 (|......|)


GP:

现在，问题在于：当我选择第一个小程序或第二个小程序时，两者都返回APDU缓冲区（= theArray）： 

OpenSC: opensc-tool -s 00a404000a01020304050202020202
Using reader with a card: ACS CCID USB Reader 0
Sending: 00 A4 04 00 0A 01 02 03 04 05 02 02 02 02 02
Received (SW1=0x90, SW2=0x00):
0A 01 02 03 04 05 02 02 02 02 02 01 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ...............

OpenSC: opensc-tool -s 00a4040006010203040502
Using reader with a card: ACS CCID USB Reader 0
Sending: 00 A4 04 00 06 01 02 03 04 05 02
Received (SW1=0x90, SW2=0x00):
0A 01 02 03 04 05 02 02 02 02 02 01 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ...............

OpenSC:

问：为什么它会有这种行为？

为什么对于这两个命令都选择了第一个小程序？

1 个解决方案

解决方案1
 1 已采纳  2015-02-23 20:49:01

AID是分层的。 Java Card运行时仅选择与给定字节匹配的第一个，即使AID包含更多字节也是如此。 如果再次触发SELECT ，它可能会选择第二个。

为了解决这个问题，即使对于最短的AID中的字节，也要提供与Applets AID不同的Applet AID。

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