Java

PC/SC Get Card UID

See more SCard Examples

Sends the APDU command to get a card's UID. Chilkat2 Java

import com.chilkatsoft.chilkat2.BinData;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.SCard;

public class ChilkatExample {

    public static void main(String[] args) {
        boolean success = false;

        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        SCard scard = new SCard();

        // First establish a context to the PC/SC Resource Manager
        try {
            scard.establishContext("user");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Use your own smart card reader name here.
        success = scard.connect("ACS ACR122 0", "shared", "no_preference");
        if (!success) {
            System.out.println(scard.getLastErrorText());
            return;
        }

        System.out.println("Connected reader: " + scard.getConnectedReader());
        System.out.println("Active protocol: " + scard.getActiveProtocol());
        System.out.println("ATR: " + scard.getCardAtr());
        System.out.println("Reader Status: " + scard.getReaderStatus());

        //  Send the APDU command 0xFF, 0xCA, 0x00, 0x00, 0x00
        BinData bdRecv = new BinData();
        try {
            scard.transmitHex(scard.getActiveProtocol(), "FFCA000000", bdRecv, 32);
            success = true;
        } catch (ChilkatException e) {
            success = false;
        }
        if (success) {
            System.out.println("Received: " + bdRecv.getEncoded("hex"));

            // The UID is the returned data without the final 2 bytes.
            int numBytes = bdRecv.getNumBytes();
            if (numBytes > 2) {
                System.out.println("UID: " + bdRecv.getEncodedChunk(0, numBytes - 2, "hex"));
            }
        } else {
            System.out.println(scard.getLastErrorText());
        }

        // Disconnect from this reader.
        try {
            scard.disconnect("leave");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
        }

        // Applications should always release the context when finished.
        try {
            scard.releaseContext();
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
        }
    }
}