RMI Usage
Posted: Thu Feb 25, 2016 2:13 am
1. Declare remote method interface
2. Implement remote method interface
3. Implement Applet which is used to invoke remote method
4. upload and install
(These steps are the same as other applets)
5. SELECT command
>> /select 112233445500
>> 00 A4 04 00 06 11 22 33 44 55 00 00
<< 6F 24 6E 22 5E 20 02 02 38 81 00 B7 00 07 74 65 73 74 52 4D 49 10 72 6D 69 49 6E 74 65 72 66 61 63 65 49 6D 70 6C 90 00
Response to SELECT command
Parsing results:
Version num:0202
invoke ins is 0x38;
remote ref id is 00B7; (Reference value of the remote object)
Package name: 07 74 65 73 74 52 4D 49(testRMI)
Class Name: 10 72 6D 69 49 6E 74 65 72 66 61 63 65 49 6D 70 6C (RMIInterfaceImpl)
6. Invoking method add:
>> /send 803802020800B7A7F611112222
>> 80 38 02 02 08 00 B7 A7 F6 11 11 22 22
<< 81 33 33 90 00
0x81 indicates that it excutes successfully, the result is 3333(1111 + 2222 => 3333);
7. Invoking method getMagic:
>> /send 803802020400B7C741
>> 80 38 02 02 04 00 B7 C7 41
<< 81 55 AA 90 00
0x81 indicates that it excutes successfully, and it returns magic value 55AA.
Note: Please refer to Runtime Environment Specification for the Java Card Platform, Version 2.2.2 - charpter 8 for the response value parsing of SELECT command, commands construction of remote method invoking and response parsing.
Code: Select all
package testRMI;
import java.rmi.*;
public interface rmiInterface extends Remote {
public short getMagic() throws RemoteException;
public short add(short value1, short value2) throws RemoteException;
}2. Implement remote method interface
Code: Select all
package testRMI;
public class rmiInterfaceImpl implements rmiInterface {
public short getMagic() {
return (short) 0x55AA;
}
public short add(short value1, short value2) {
return (short) (value1 + value2);
}
}
3. Implement Applet which is used to invoke remote method
Code: Select all
package testRMI;
import java.rmi.*;
import javacard.framework.*;
import javacard.framework.service.Dispatcher;
import javacard.framework.service.RemoteService;
import javacard.framework.service.RMIService;
import javacard.framework.service.CardRemoteObject;
public class testRMI extends Applet
{
private Remote myRemoteInterface;
private RemoteService myRemoteService;
private Dispatcher myDispatcher;
private CardRemoteObject myCardRemoteObject;
testRMI() {
myRemoteInterface = new rmiInterfaceImpl();
myCardRemoteObject = new CardRemoteObject();
myCardRemoteObject.export(myRemoteInterface); // Only the exported object can be invoked by card outside;
myDispatcher = new Dispatcher((short) 1);
myRemoteService = new RMIService(myRemoteInterface);
myDispatcher.addService(myRemoteService, Dispatcher.PROCESS_COMMAND);
}
public static void install(byte[] bArray, short bOffset, byte bLength)
{
new testRMI().register(bArray, (short) (bOffset + 1), bArray[bOffset]);
}
public void process(APDU apdu)
{
// if (selectingApplet())
// {
// return;
// }
// byte[] buf = apdu.getBuffer();
// switch (buf[ISO7816.OFFSET_INS])
// {
// case (byte)0x00:
// break;
// default:
// ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);
// }
// Send directly to the service dispatcher;;
myDispatcher.process(apdu);
}
}
4. upload and install
(These steps are the same as other applets)
5. SELECT command
>> /select 112233445500
>> 00 A4 04 00 06 11 22 33 44 55 00 00
<< 6F 24 6E 22 5E 20 02 02 38 81 00 B7 00 07 74 65 73 74 52 4D 49 10 72 6D 69 49 6E 74 65 72 66 61 63 65 49 6D 70 6C 90 00
Response to SELECT command
Code: Select all
select_response {
u1 fci_tag = 0x6F
u1 fci_length
u1 application_data_tag = 0x6E
u1 application_data_length
u1 jc_rmi_data_tag = 0x5E
u1 jc_rmi_data_length
u2 version = 0x0202
u1 invoke_ins
union {
normal_ref_response normal_initial_ref
normal_null_response null_initial_ref
error_response initial_ref_error
} initial_ref
}Parsing results:
Version num:0202
invoke ins is 0x38;
remote ref id is 00B7; (Reference value of the remote object)
Package name: 07 74 65 73 74 52 4D 49(testRMI)
Class Name: 10 72 6D 69 49 6E 74 65 72 66 61 63 65 49 6D 70 6C (RMIInterfaceImpl)
6. Invoking method add:
>> /send 803802020800B7A7F611112222
>> 80 38 02 02 08 00 B7 A7 F6 11 11 22 22
<< 81 33 33 90 00
0x81 indicates that it excutes successfully, the result is 3333(1111 + 2222 => 3333);
7. Invoking method getMagic:
>> /send 803802020400B7C741
>> 80 38 02 02 04 00 B7 C7 41
<< 81 55 AA 90 00
0x81 indicates that it excutes successfully, and it returns magic value 55AA.
Note: Please refer to Runtime Environment Specification for the Java Card Platform, Version 2.2.2 - charpter 8 for the response value parsing of SELECT command, commands construction of remote method invoking and response parsing.