JCOP tools and walllet example

Question

Hi,
I'm trying to execute the well known (not for me ;-)) Wallet example with JCOP tools 3.1.1 but I have some problems.
The first is related to install parameters: searching into other threads I was able to install the applet using 0102030405 parameter (even if it's not clear for me the meaning of this parameter, the install method accepts 3 parameters, bArray, bOffset and bLength).
Here the install APDU trace:
cm> install -i 77616c6c65742e617070 -q C9#(0102030405) 6578616d706c6573 77616c6c65742e617070
=> 80 E6 0C 00 2A 08 65 78 61 6D 70 6C 65 73 0A 77 ....*.examples.w
61 6C 6C 65 74 2E 61 70 70 0A 77 61 6C 6C 65 74 allet.app.wallet
2E 61 70 70 01 00 07 C9 05 01 02 03 04 05 00 00 .app............
(2002 usec)
<= 90 00 ..
Status: No Error
cm> card-info
=> 80 F2 80 00 02 4F 00 00 .....O..
(471848 nsec)
<= 08 A0 00 00 00 03 00 00 00 01 9E 90 00 .............
Status: No Error
=> 80 F2 40 00 02 4F 00 00 [email protected]..
(521854 nsec)
<= 0A 77 61 6C 6C 65 74 2E 61 70 70 07 00 90 00 .wallet.app....
Status: No Error
=> 80 F2 10 00 02 4F 00 00 .....O..
(762666 nsec)
<= 07 A0 00 00 00 03 53 50 01 00 01 08 A0 00 00 00 ......SP........
03 53 50 41 08 65 78 61 6D 70 6C 65 73 01 00 01 .SPA.examples...
0A 77 61 6C 6C 65 74 2E 61 70 70 90 00 .wallet.app..
Status: No Error
Card Manager AID : A000000003000000
Card Manager state : OP_READY
Application: SELECTABLE (--------) "wallet.app"
Load File : LOADED (--------) A0000000035350 (Security Domain)
Module : A000000003535041
Load File : LOADED (--------) "examples"
Module : "wallet.app"
After that I'm not able to select the applet, here the APDU trace:
cm> /select |wallet.app
=> 00 A4 04 00 0A 77 61 6C 6C 65 74 2E 61 70 70 00 .....wallet.app.
(334400 nsec)
<= 6E 00 n.
Status: CLA value not supported
jcshell: Error code: 6e00 (CLA value not supported)
jcshell: Wrong response APDU: 6E00
Any help would be very appreciated.
Dariush.

Answer 1

Dariush, whether this pin data or not is defined inside an applet. As for Wallet it must be pin value. But I saw several implementations of Wallet applet with different initialize parameters processing.
Consider this code:
   private Wallet(byte[] bArray, short bOffset, byte bLength) {
      pin = new OwnerPIN(PIN_TRY_LIMIT, MAX_PIN_SIZE);
      byte iLen = bArray[bOffset]; // aid length
      bOffset = (short) (bOffset + iLen + 1);
      byte cLen = bArray[bOffset]; // info length
      bOffset = (short) (bOffset + cLen + 1);
      byte aLen = bArray[bOffset]; // applet data length
      pin.update(bArray, (short) (bOffset + 1), aLen);
      register();
   public static void install(byte[] bArray, short bOffset, byte bLength) {
      new Wallet(bArray, bOffset, bLength);
   }Think of bArray data array as installation parameters (like command-line params in main method of the Java application); some of them you defined using C9 tag in JCOP Shell. Look at the comments in Wallet constructor and you will understand what data is passed. aLen variable denotes the length of parameters you passed through C9 tag.
You can make a breakpoint on the first line in the constructor and then inspect what bArray actually contains.
bOffset - is the offset in bArray, bLength - length of the installation params.
Regards, Eugene