Implement a driver for a card cryptographic chip with multiple ATR
Hello world
I use RIM to develop a driver for cryptographic smart card.
I created the MyCryptoSmartCard class that extends CryptoSmartCard. The problem is that this class allows only an ATR, but my card can have more than one ATR. It costs of the version. I want to control all in one card, and obviously with a single driver.
So what I need is to make a single conductor for several ATR. Is this possible?
The structure of my class of smart card is:
public class mycryptosmartcard extends CryptoSmartCard implements {persistable
private final static _ATR Byte = {(byte) 0 x 33, (byte) 0x6F,...};
...
public static void libMain (String [] args) {}
try {}
SmartCardFactory.addSmartCard (new M3CryptoSmartCard ());
} catch (ControlledAccessException falls) {...}
...
These are the only solutions tha I thought, but I don't know if it's possible:
-Make a MyCryptoSmartCard of constructor passing the RTA and the pourla create with ATR one or the other.
-Put all the ATR as private variables and later to treat each case current.
Could someone give me a solution? I would avoid the possibility of a driver for each RTA.
Thank you very much.
Hi, I think that it is theoretically possible to write a single driver for your two cards. In practice, it may be more difficult that it sounds good, depending on how different the two cards are actually.
The class CryptoSmartCard * can * support more than one ATR... once again, at least in theory. "To support a given RTA" means that your class return true from the checkAnswerToResetImpl method. So I don't see why your implementation of this method should not return true in response to one of the two separate ATR responding with your cards.
Having returned the true value, your driver actually expressed as a candidate for the card driver currently in the drive. After that, you will need to ensure that your pilot tunes its behavior to the requirements of the current map. You need to maintain an accessible indicator which ATR has received that is facing types two cards are in the player, but I think that a class variable should be able to do it for you.
You cannot use a special constructor because your class is built in libMain before the call to checkAnswerToResetImpl. Then you probably just need to condition the behaviour of your other methods on the ATR which has been received and encoded as your class variable (i.e. use if or statements to pass).
Hope this helps
Tags: BlackBerry Developers
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