Java Card e-payment application help

dear all,
I want to develop a java card e-payment application , and I am a beginner user to java card apis . if someone can support me on finding good matertials and tools to aid me in developing this application I wil be pleased
thanks for every body
Message was edited by:
M.ElSobky

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* Send message by SMS
* @param message byte[] : message to send
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I can't do all comments in english; another comments is in french.

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Hi,
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Hi Shane,
I have not read anywhere else that the JC3 cards are not available, thank you so much for that tip! I am not doing it for research, but I am working on this alone and will have to deploy a card later on. I will be getting all the right versions now.
I'll ask the question then, using just the JCDK:
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(2) Run the simulator using -o "eeprom data filename"
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Code:
public class MyApp extends Applet {
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       data = {0x01, 0x01, 0x01};
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       return data;
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If I know this is the correct way of going about it, then I can work towards it getting done.
From other examples I can see that this is probably the way it should work, but my data array always returns as {0x00, 0x00, 0x00}.

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Hi lexdabear,
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Please I am doing my final year project on secure mobile application using Java Card Technology.
I need to write and an application that can send SMS on a SIM card to another SIM card with the same application. The application will have a server side which manage the storage of messages and at the same time communicate information to the client on the SIM remotely. I am suppose to use wi-fi (TCP/IP) for transmission.
Can anybody please give me ideas and possible working codes and simulators.
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Hi,
I found the following resources helpful when starting out in JavaCard.
JavaCard documentation:
Java Card Technology for Smart Cards: Architecture and Programmer's Guide (Book)
http://java.sun.com/docs/books/javacard/index.html
JavaCard specifications:
http://java.sun.com/products/javacard/specs.html
Global Platform specifications:
http://www.globalplatform.org/specificationview.asp?id=card
Communication between SmartCards and terminals is based on ISO 7816 part 3 and 4 so if you�re completely new to the SmartCard environment it may be helpful getting an overview regarding these specifications. Unfortunately these specifications are not free, they�re available from.
http://www.iso.org/iso/en/ISOOnline.frontpage
Software:
The basis for all development is the JavaCard and Java Development kits.
Java Development Kit
http://java.sun.com/j2se/1.4.2/download.html
JavaCard Development Kit
http://java.sun.com/products/javacard/dev_kit.html
Full installation instructions can be found in JCDevKit_User_Guide.pdf which is contained in the JavaCard Development Kit distribution.
Several companies provide IDE�s that will aid you in developing and deploying applets to JavaCard.
For example:
Aspects Developer
http://www.aspectssoftware.com/devtools/index.html
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Omnikey
http://www.omnikey.com/
GemPlus
http://support.gemplus.com/gemdownload/readers/index.aspx
Hope this helps.
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A question about design of Java Application on java card.

Hi every one,
I have a question about design of Java applet on java card,
There is an application on my card that it is not java card, it include a DF and some EF under DF, I would like to know if I want to have this application on java card ,how can I design DF and EF on java card ,I mean is there any relation between DF,EF with applet and file? for example can I say DF is same as applet and EF is same as file?
I'll appreciate for any help .
yours sincerely,
orchid

hi
you can write a java class for DF.
an instance of DF class have some EF objects.
for example,
samples/com/sun/javacard/samples/JavaPurse/CyclicFile.java
implements ISO 7816 CyclicFile ( EF )
see also:
http://forum.java.sun.com/thread.jspa?threadID=673745&messageID=3936272
best regards,
siavash

Seeking Help for Guidance in developing a product using JAVA CARD

Hi All,
I am using windows environment with netbeans 6.8 as developer tool and MySql Server connectivity for back end process.My requirement is to develop applets and installing them to my Smart card and reader.my question is
1. how i am supposed to create applets to get the student id of particular student whose id is already registered in the database?
2. how to install them into the smart card?
3.what are the commands i am supposed to follow if other than APDU commands?
4.i found there is APDU commands but what do that each CLA,INS,p1,p2,Lc,le..commands used for?how can i use them in my creation of applets.i found the command varies for certain requirements.
5.if possible please help me with a small example so that i will start developing it.
can anyone help me in developing this application.i will be so helpful if anyone helps me in guiding me to develop the java card product.
Edited by: Sijukj on Mar 4, 2010 7:04 AM

Hi,
Welcome to the wonderful world of embedded Java development!
Sijukj wrote:
1. how i am supposed to create applets to get the student id of particular student whose id is already registered in the database?The first step is to download the Java Card Development Kit (JCDK) from the Sun website (along with the related documentation/specifications). If you plan on using your code on a real card, I would recommend JC version 2.2.1 or 2.2.2. If it is sufficient to run your applet on a simulator (as a proof of concept or for assignments) with no intention on running on real hardware you could go for JC 3.0.2 and use the supplied simulator. This version of JC does not have commercially available cards as of yet.
Once you have the applet coded and installed on your card, you would personalise the card for the card holder. This means loading card holder specific data into your application. This may also involve registering the smart card ID with the student in your database.
2. how to install them into the smart card?The procedure for loading and installing applets is outlined in the Java Card documentation (available with the JC development kits from Sun) and the GlobalPlatform card specifications (available from [http://www.globalplatform.org]). You can look into some open source tools for doing this (GPShell and the Java Card Development Kit).
3.what are the commands i am supposed to follow if other than APDU commands?This depends on what you are trying to achieve with your applet. If you want interoperability you could implement a standard like ISO7816 or IOS24727. This is a lot of work so you may just want to implement the proprietary you require for each operation you need (e.g. set student ID, get student ID etc).
4.i found there is APDU commands but what do that each CLA,INS,p1,p2,Lc,le..commands used for?how can i use them in my creation of applets.i found the command varies for certain requirements.These are defined in ISO7816 part 4.
The CLA byte gives information on the command you are sending such as secure messaging, command chaining, ISO or proprietary command
The INS is the instruction or command you are trying to perform
P1 and P2 are parameters to the command. These may not be required for each command but are able to be used to convey further information to the applet.
Lc is the length of the data field you are sending (e.g. for a PUT DATA command this would be the amount of data you are sending)
Le is the length of the data you expect to receive back from the card. If this is absent you do not expect the card to return any data, 0x00 means send all the data you have left (up to the limit of the response APDU)
5.if possible please help me with a small example so that i will start developing it.You can find example code in the Java Card Development Kit. There are a wide range of examples there that can help you get started.
Cheers,
Shane

Is it possible to simulate whole java card application on simulator?

Hello all,
currently i dont have any real java card yet,not either reader . I already made a simple applet and check its working by CJCRE (net beans simulator), it is working fine,
now i want to move to host application which will communicate with java card via card reader. Is this possible to simulate complete application ( host application + java card applets)?
I want to check it out that:- which line of java program would be helpful to know that:-
1-"how real host application will talk to reader"
2- how it connect and disconnect the reader
3- how it send apdu to java card by reader
and much more.
I am using netbeans 7.1 and it is using CJCRE as a simulator....

you mean to say this
http://askra.de/software/jcdocs/app-notes-2.2.2/apduio.html
I am quite confused now, i read this but still can not imagine the concept ,
an applet code is :-
public class GetName extends Applet
     final static byte CLASS     = (byte) 0x80; // Class of the APDU commands
     final static byte INS_READ = (byte) 0x02; // instruction for the READ APDU command
     final static byte INS_WRITE = (byte) 0x03; // instruction for the READ APDU command
     final static byte INS_DY_CO = (byte) 0x04; // instruction for the READ APDU command
     final static byte[] text    = {(byte) 'A', (byte) 'M', (byte) 'I', (byte) 'T'};
     public static byte[] holder;
     public static void install(byte[] bArray, short bOffset, byte bLength)
        new GetName();
    protected GetName()
        holder = new byte[5];// allocation of memory in runtime
        register();
    public void process(APDU apdu)
          if(selectingApplet())
               return;
        byte[] cmd_apdu = apdu.getBuffer();
         if (cmd_apdu[ISO7816.OFFSET_CLA] == CLASS)
               switch(cmd_apdu[ISO7816.OFFSET_INS])
                    case INS_READ:
                    if ((cmd_apdu[ISO7816.OFFSET_P1] != 0) || (cmd_apdu[ISO7816.OFFSET_P2] != 0))
                    ISOException.throwIt(ISO7816.SW_WRONG_P1P2);
                    short le = (short)(cmd_apdu[ISO7816.OFFSET_LC] & 0x00FF);
                    short len_text = (short)text.length;
                    if (le != len_text)
                    ISOException.throwIt((short)(ISO7816.SW_CORRECT_LENGTH_00 + len_text));
                    apdu.setOutgoing();
                    apdu.setOutgoingLength((short)len_text);
                    apdu.sendBytesLong(text, (short)0, (short)len_text);
                    break;
                // here we save data from apdu and will keep inside the data byte
                    case INS_WRITE:
                short lc = (short)(cmd_apdu[ISO7816.OFFSET_LC] & 0x00FF);
                Util.arrayCopy(cmd_apdu, (short) ((ISO7816.OFFSET_CDATA) & 0xff), holder, (short) 0, lc);
                    short len_holder_inside_write= (short) holder.length;
                   apdu.setOutgoing();
                apdu.setOutgoingLength((short)len_holder_inside_write);
                apdu.sendBytesLong(holder, (short) 0, (short) len_holder_inside_write);
                break;
                case INS_DY_CO:
                    short len_holder= (short) holder.length;
                apdu.setOutgoing();
                apdu.setOutgoingLength((short)len_holder);
                apdu.sendBytesLong(holder, (short) 0, (short) len_holder);
                break;
                    default :
                    ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);
         else
                ISOException.throwIt(ISO7816.SW_CLA_NOT_SUPPORTED);
}now i think i need to make a another java file which would contain a main class, Is this both file would be inside a single java card project. and how these both would be connect to each other.
for manually run a applet- there were two steps 1-
C:\java_card_kit-2_2\samples\src\demo>jcwde jcwde-getname.app
Java Card 2.2 Workstation Development Environment (version 0.18).
Copyright 2002 Sun Microsystems, Inc. All rights reserved.
jcwde is listening for T=0 Apdu's on TCP/IP port 9,025.
and in second terminal we wrote-
C:\java_card_kit-2_2\samples\src\demo>apdutool -nobanner -noatr getname.scr > ge
tname.scr.jcwde.out
Here it is clear that, if i will use javacardio then no need to pass the apdu from a file .....but i am confuse about how it possible, ie. is both file lie in same project , because i m using simulator so i need to run these both file simoltaneously........give me some roughly steps to implement this.

Java Card Help!!!!!!1

hi all!
please excuse me all along that i can make you lose, my name is Victor Romero I am student of 3 semester of systems engeniering at the University of Antioquia (Medellin-Colombia), here in my country the truth is that the new technologies are very little as much to study as to develop them, but I have conformed a training group to investigate about Java Card technology from Sun Microsystems. we have obtained two readers towitoko chipdrive and we are so happy by this step, but the truth until I have not been able to put work the environtmen correctly, i need to know if you can lend me some type of help. i know that you are a occupied persons and if I must pay some money by its collaboration please lets know me. At the moment I am working under windowsME what I must do? Thanks a lot

The best you can do when you start with Java Card development downlaod the Sun tools from java.sun.com/products/javacard. Set up your environment as described in the documentations that comes with the tools. This allows you to get familar with Java Card. Later you can purchase a tool to do development for a real card product. You can use OCF to integrate your stuff into Java application that run on the desktop. There is also a good book about Java Card http://java.sun.com/docs/books/javacard/

Help:java card and rfid

I searched a lot about java card and rfid, but don't have a clear idea about the relationship between the two. Please help me....

They have NO common grounds.
A java card needs a real "smart" processor because it contains a Java Virtual Machine, can do crypto and other stuff. The cost to produce one is in the multi dollar range. Some java cards can communicate contactless by "radio".
RFID is the term to describe a very primitive device, all it can do is report a unique identification (ID) and it does this contactless (RF). the cost to produce one is in the cent range. You can use it to track products or containers or other stuff.
Since RFID is also a very popular buzzword these days, the exact meaning of RFID varies.
Of course, you could use a java card to play RFID tag, but that would be
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Develop Mutiple application java card?

how does the multiple application java card works?I mean do we have to write different applets for different applications? and if yes then how does the card reader will recognize for which application the card should be used? Can anyone help me???

Hi,
how does the multiple application java card works?Multiple applets can exist on a single card because each applet instance is identified by a unique AID (application identifier). The card knows which applet is currently active and manages this for you. The active applet is the last applet that has been selected in the current session or the default applet for the card. If there is no default applet the card manager will be active.
do we have to write different applets for different applications? If the different application requires different functionality you may want to use a separate applet but you can have multiple instances of the same applet as long as each instance has a unique instance AID. The instance AID is different to the applet/module AID (but it can be the same value). Each instance will have the same applet AID. You need to be careful with static variables when you have multiple instances of an applet as in any Java application, as there is still only on copy of the class in the JVM.
how does the card reader will recognize for which application the card should be used?The card reader does not care which applet is being used. It only cares about the physical card. The card manager handles the currently active applet.
I hope I have explained this clearly enough. One thing to remember is there are 3 AID's. The package AID, the module AID (for the applet class in the package) and the instance AID (for the instance of the applet created in the JVM with an install for install command).
Cheers,
Shane

How to run Java Card 2.2.1 demo application?

Hi Friends..
i want to know how to run Java Card 2.2.1 demo application in Windows environment..
Sorry, perhaps this question looks like a little bit stupid.. :(
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JC_HOME : C:\java_card_kit-2_2_1
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Please help me regarding this,
Thanks in advance..

Is there any suggestion for my question?.. :(
Thanks in advance..

Java Card e-payment application help

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