JCWDE模拟器运行：调用的install（）方法异常

Question

package hello;



import javacard.framework.APDU;

import javacard.framework.Applet;

import javacard.framework.ISO7816;

import javacard.framework.ISOException;

import javacard.framework.Util;



public class HelloWorldApplet extends Applet {

         private static final byte[] helloWorld = {(byte)'H',(byte)'e',(byte)'l',(byte)'l',(byte)'o',(byte)' ',(byte)'W',(byte)'o',(byte)'r',(byte)'l',(byte)'d',};



         private static final byte HW_CLA = (byte)0x80;

         private static final byte HW_INS = (byte)0x00;



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

             new HelloWorldApplet().register(bArray, (short) (bOffset + 1), bArray[bOffset]);

         }



         public void process(APDU apdu) {



             if (selectingApplet()) {

             return;

         }



         byte[] buffer = apdu.getBuffer();

         byte CLA = (byte) (buffer[ISO7816.OFFSET_CLA] & 0xFF);

         byte INS = (byte) (buffer[ISO7816.OFFSET_INS] & 0xFF);



         if (CLA != HW_CLA)

        {

            ISOException.throwIt(ISO7816.SW_CLA_NOT_SUPPORTED);

        }



          switch ( INS ) {

             case HW_INS:

               getHelloWorld( apdu );

               break;

            default:

               ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);

         }

   }



  private void getHelloWorld( APDU apdu)

  {

      byte[] buffer = apdu.getBuffer();

      short length = (short) helloWorld.length;



      Util.arrayCopyNonAtomic(helloWorld, (short)0, buffer, (short)0, (short) length);



      apdu.setOutgoingAndSend((short)0, length);

  }

}

javac -g -d hello -classpath “.;%JC_HOME%\lib\api.jar;%JC_HOME%\lib\javacardframework.jar” HelloWorldApplet.java

//+

// Copyright © 2003 Sun Microsystems, Inc. All rights reserved.

// SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.

//-



//+

// Workfile:@(#)jcwde.app    1.4

// Version:1.4

// Date:07/16/03

//-



// applet                                        AID

com.sun.javacard.installer.InstallerApplet       0xa0:0x0:0x0:0x0:0x62:0x3:0x1:0x8:0x1

com.sun.javacard.samples.JavaPurse.JavaPurse     0xa0:0x0:0x0:0x0:0x62:0x3:0x1:0xc:0x2:0x1

com.sun.javacard.samples.JavaLoyalty.JavaLoyalty 0xa0:0x0:0x0:0x0:0x62:0x3:0x1:0xc:0x5:0x1

com.sun.javacard.samples.wallet.Wallet           0xa0:0x0:0x0:0x0:0x62:0x3:0x1:0xc:0x6:0x1

hello.HelloWorldApplet                           0x01:0x02:0x03:0x04:0x05:0x06:0x07:0x08:0x09:0x00:0x01 

我在命令行窗口(Windows7)中使用以下命令启动jcwde：

jcwde jcwde.app

然后我启动一个新的命令行窗口，并在那里启动apdutool：

apdutool -nobanner -noatr HelloWorldApplet.scr > hello.scr.jcwde.out

以下是。scr脚本文件：powerup；

// Select the installer applet
0x00 0xA4 0x04 0x00 0x09 0xa0 0x00 0x00 0x00 0x62 0x03 0x01 0x08 0x01 0x7F;
// 90 00 = SW_NO_ERROR

// create Applet
0x80 0xB8 0x00 0x00 0x0d 0x0b 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x00 0x01 0x00 0x7F;

// Select Applet
0x00 0xa4 0x04 0x00 0x0b 0x01 0x02 0x03 0x04 0x05 0x6 0x07 0x08 0x09 0x00 0x01 0x7F;

// Send APDU command to get a Hello World message
0x80 0x00 0x00 0x00 0x00 0x00;

powerdown;

D:\jc221\samples\src\demo\jcwde>jcwde jcwde.app

Java Card 2.2.1 Workstation Development Environment, Version 1.3

Copyright 2003 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.

jcwde is listening for T=0 Apdu's on TCP/IP port 9á025.

Exception from the invoked install() method:public static void hello.HelloWorldApplet.install(byte[],short,byte)

jcwde exiting on receipt of power down command.



D:\jc221\samples\src\demo\jcwde>

CLA: 00, INS: a4, P1: 04, P2: 00, Lc: 09, a0, 00, 00, 00, 62, 03, 01, 08, 01, Le: 00, SW1: 90, SW2: 00

CLA: 80, INS: b0, P1: 00, P2: 00, Lc: 00, Le: 00, SW1: 90, SW2: 00

CLA: 80, INS: b8, P1: 00, P2: 00, Lc: 0d, 0b, 01, 02, 03, 04, 05, 06, 07, 08, 09, 00, 01, 00, Le: 00, SW1: 64, SW2: 44

CLA: 80, INS: ba, P1: 00, P2: 00, Lc: 00, Le: 00, SW1: 90, SW2: 00

CLA: 00, INS: a4, P1: 04, P2: 00, Lc: 0b, 01, 02, 03, 04, 05, 06, 07, 08, 09, 00, 01, Le: 00, SW1: 6d, SW2: 00

CLA: 80, INS: 00, P1: 00, P2: 00, Lc: 00, Le: 00, SW1: 6d, SW2: 00

Answer 1

这个问题的根源似乎是一个bug（？）在JCWDE。虽然Java Card规范要求install参数至少包含长度字节（即使用于指示零长度），但JCWDE似乎使用通过脚本获得的任何install参数。因此，如果不explcyly传入安装参数，字节数组Barray的长度将为零。因此，访问barray[bOffset]将导致indexoutofbounds异常。因此，检查barray/blength的长度并调用

register(bArray, (short) (bOffset + 1), bArray[bOffset]);

或

register();

相应地。