我尝试使用可共享接口,使用Eclipse 3.7 SDK在Java卡2.2.2中创建一个简单的客户端和服务器小程序。调用方法JCSystem.getAppletShareableInterfaceObject
时会引发异常,因此返回SW设置为6F00。
这是客户端应用代码(Test_Client.java
):
package client;
import server.Test_ServerInf;
import javacard.framework.AID;
import javacard.framework.APDU;
import javacard.framework.Applet;
import javacard.framework.ISO7816;
import javacard.framework.ISOException;
import javacard.framework.JCSystem;
public class Test_Client extends Applet {
protected static final byte INS1 = (byte)0xE2;
protected static final byte INS2 = (byte)0x21;
byte[] ServerAIDbyte={(byte)0x20,(byte)0x21,(byte)0x22,(byte)0x23,(byte)0x24,(byte)0x25,(byte)0x26,(byte)0x27,(byte)0x01};
AID ServerAID;
private Test_Client() {
}
public static void install(byte bArray[], short bOffset, byte bLength)
throws ISOException {
new Test_Client().register();
}
public void process(APDU apdu) throws ISOException {
// TODO Auto-generated method stub
byte[] apduBuffer = apdu.getBuffer();
byte Ins=apduBuffer[ISO7816.OFFSET_INS];
short byteread = apdu.setIncomingAndReceive();
if (selectingApplet())
return;
switch (Ins){
case INS1:
Ins1_Handler(apdu);
return;
case INS2:
Ins2_Handler(apdu,apduBuffer);
return;
default:
ISOException.throwIt(ISO7816.SW_FUNC_NOT_SUPPORTED);
}
}
private void Ins1_Handler(APDU apdu){
Test_ServerInf sio = null;
ServerAID=JCSystem.lookupAID(ServerAIDbyte,(short) 0,(byte) ServerAIDbyte.length);
if(ServerAID==null)
ISOException.throwIt( (short) 0x6A82);
////server request
try{
sio=(Test_ServerInf)(JCSystem.getAppletShareableInterfaceObject(ServerAID, (byte) 0));
}
catch(SecurityException e)
{
ISOException.throwIt((short)0x12);
}
catch(Exception e)
{
ISOException.throwIt((short)0x10);
}
if(sio==null)
ISOException.throwIt((short)0x6A00);
}
private void Ins2_Handler(APDU apdu,byte[] apduBuffer){
Test_ServerInf sio = null;
////connect to server
ServerAID=JCSystem.lookupAID(ServerAIDbyte,(short) 0,(byte) ServerAIDbyte.length);
if(ServerAID==null)
ISOException.throwIt( (short) 0x6A82);
////server request
try{
sio=(Test_ServerInf)(JCSystem.getAppletShareableInterfaceObject(ServerAID, (byte) 0));
}
catch(SecurityException e)
{
ISOException.throwIt((short)0x12);
}
catch(Exception e)
{
ISOException.throwIt((short)0x10);
}
if(sio==null)
ISOException.throwIt((short)0x6A00);
}
}
这是服务器小程序代码(Test_Server.java
):
package server;
import javacard.framework.APDU;
import javacard.framework.Applet;
import javacard.framework.ISOException;
import server.Test_ServerInf;
import javacard.framework.Shareable;
import javacard.framework.AID;
public class Test_Server extends Applet implements Test_ServerInf{
private Test_Server() {
}
public static void install(byte bArray[], short bOffset, byte bLength)
throws ISOException {
new Test_Server().register();
}
public void process(APDU apdu) throws ISOException {
// TODO Auto-generated method stub
}
public Shareable getShareableInterfaceObject(AID clientAID, byte parameter) {
return this;
}
public short method1(){
return (short)0x01;
}
public short method2(){
return (short)0x02;
}
}
和可共享的接口文件(Test_ServerInf.java
):
package server;
import javacard.framework.Shareable;
public interface Test_ServerInf extends Shareable {
public short method1();
public short method2();
}
答案 0 :(得分:2)
您正尝试在客户端applet类的成员字段中存储对可共享接口对象的引用:
sio = (Test_ServerInf)(JCSystem.getAppletShareableInterfaceObject(ServerAID, (byte) 0));
其中sio
被定义为applet类实例的私有成员:
public class Test_Client extends Applet {
private Test_ServerInf sio;
这将导致SecurityException
,因为可共享接口对象由服务器小程序拥有(即,由其他上下文拥有)。不允许将其他上下文拥有的对象存储在实例字段中。
请参见运行时环境规范,Java Card平台,版本2.2.2 中的访问类实例对象字段(第6.2.8.3节):
字节码:
getfield
,putfield
- [...]如果对象在当前活动的上下文中由小应用程序拥有,则允许访问。
- 否则,访问将被拒绝。
答案 1 :(得分:0)
我找到了此错误的根源。我曾经使用内部开发的应用程序而不是GPShell来加载和安装小程序。当我尝试使用GPShell加载和安装小程序时,问题解决了,一切正常。我不知道该应用程序如何危害已加载的程序包,但可以正常运行(调试2周后)。