Memory optimization in sim toolkit applet

Question

Dear all
i am developing one sim toolkit application.
i am dispalying text on ME screen like this:
name
abcxyz(taking user input using GET INPUT)
password
abcxyz(taking user input using GET INPUT)
bank
ICICI(according to menu selection from user)
for this ,i am copying all this information in one array using
util.arraycopy
and then displaying all this info using
proHdlr.initdisplaytext
i am declaring all arrays (whose content is not going to be changed like name ,password and bank as
global) and all other arrays as transient.
There is some kind of memory leak in aplication ,due to this my application runs for
some(20 or 25) times and then it crash.(to make it work again i have to load it again on sim)
is it necessary to free merory allocated by transient array? or it will released automatically after its use.
// code for ur reference in which memory leaks is here
confirm1 = JCSystem.makeTransientByteArray((short)65, JCSystem.CLEAR_ON_RESET);
//buffer and tempBuffer are also transient arrays in which name and password from
proactive command GET INPUT are stored.
     len = 0;
     Util.arrayCopy(name, (short)0, confirm1, (short)0, (short)name.length);
     len += name.length;
     Util.arrayCopy(newLine, (short)0, confirm1, (short)len,(short)newLine.length);
     len += newLine.length;
     Util.arrayCopy(buffer, (short)0, confirm1,(short)len ,(short)l);
     len += l;
     Util.arrayCopy(newLine, (short)0, confirm1, (short)len,(short)newLine.length);
     len += newLine.length;
     Util.arrayCopy(password, (short)0, confirm1, (short)len, (short)password.length);     len += password.length;
     Util.arrayCopy(newLine, (short)0, confirm1, (short)len,(short)newLine.length);
     len += newLine.length;
     Util.arrayCopy(tempBuffer, (short)0, confirm1, (short)len, (short)j);
     len += j;
     Util.arrayCopy(newLine, (short)0, confirm1, (short)len, (short)newLine.length);
     len += newLine.length;
     Util.arrayCopy(bank, (short)0, confirm1, (short)len, (short)bank.length);
     len += bank.length;
     Util.arrayCopy(newLine, (short)0, confirm1, (short)len, (short)newLine.length);
     len += newLine.length;
     Util.arrayCopy(card, (short)0, confirm1, (short)len, (short)card.length);
     len += card.length;
     ProactiveHandler proHdlr = ProactiveHandler.getTheHandler();
     proHdlr.initDisplayText((byte)0x81, DCS_8_BIT_DATA, confirm1, (short)0x0000, (short)len);
     proHdlr.send();
//end of code
any other way of performing same functionality?
Thanx in advance.
Regards
Divyesh

Answer 1

As you have written beforehand: the API provides no possibility to issue directly a VERIFY PIN. The only possibility would be to check the user entered pin against the pin stored in the corresponding EF. But when i remember correctly: the EFs storing the card holder verification values are protected by NEVER (read AC), aren't they? Check the 11.11. Or ask your Schlumberger support for proprietary solutions, if they are available.
So you've got to find a workaround: another EF storing the same value which would rise some security concerns for your customer or storing the pin once at the first application startup (after the user entered it).
The solution with sending APDUs directly to the card will not work in a ME (the ME would have to select your application and i don't know any ME which would do that ;o) That would only be possible at your PC in a card reader.