Java

ScMinidriver - Get Public Keys from Smart Card Key Container

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Demonstrates how to query a key container on a smart card (or USB token) to get the public part of the private keys that are present. A key container can hold two separate private keys -- one in the "signature" position, and the other in the "key exchange" position. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.PublicKey;
import com.chilkatsoft.chilkat2.ScMinidriver;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        // Chilkat recommends the following free tool for interactively examining the contents of your smart card
        // through the ScMinidriver interface:  MGTEK Tool for Minidriver enabled Smart Cards

        // Let's first look at our smart card..
        // Here's the view of our Gemalto (Thales) IDPrime MD T=0 smart card in the MGTEK tool:

        // 

        ScMinidriver scmd = new ScMinidriver();

        // First we need to acquire a context to the smart card in the reader where it is inserted.
        // Reader names (smart card readers or USB tokens) can be discovered
        // via List Readers or Find Smart Cards
        String readerName = "Alcor Micro USB Smart Card Reader 0";
        try {
            scmd.acquireContext(readerName);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // If successful, the name of the currently inserted smart card is available:
        System.out.println("Card name: " + scmd.getCardName());

        // We likely shouldn't need to authenticate with the smart card (use a PIN) to simply get a public key,
        // so we can skip the PIN authenticatin step..

        // Let's get the key(s) present in Container #7.
        // In our case (shown in the image above), there is a private key in the "key exchange" position, but no key in the "signature" position.
        PublicKey pubkey_sig = new PublicKey();
        PublicKey pubkey_kex = new PublicKey();

        try {
            scmd.getContainerKeys(7, pubkey_sig, pubkey_kex);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        if (pubkey_sig.getEmpty()) {
            System.out.println("No signature key is present.");
        } else {
            System.out.println("Signature key:");
            System.out.println(pubkey_sig.getPem(true));
        }

        if (pubkey_kex.getEmpty()) {
            System.out.println("No Key Exchange key is present.");
        } else {
            System.out.println("Key Exchange key:");
            System.out.println(pubkey_kex.getPem(true));
        }

        scmd.deleteContext();

        System.out.println("Success.");

        // Here's the output of the above sample code:

        // Card name: IDPrime MD T=0
        // No signature key is present.
        // Key Exchange key:
        // -----BEGIN RSA PUBLIC KEY-----
        // MIIBCgKCAQEAsXeRhM55P13FbpNcXAMR3olbw2Wa6keZIHu5YTZYUBTlYWId+pNi
        // wUz3zFIEo+0IfYR0H27ybIycQO+1IIzJofUFNMAL3tZps2OKPlsjuCPls6kXpXhv
        // /gvhux8LrCtp4PcKWqJ6QVOZKChc7WAx40qFWzHi57ueqRTv3x0kESqGg/VjsqyT
        // Evb55psJO2RsfhLT7+YVh3hImRM3RDaJdkTkPuOxeFyT6N7VXD09329sLuS3QkUb
        // E9zEKDnz9X3d8dEQdJhSI9ba5fxl8R7fu8pB67ElfzFml96X1jLFtzy1pzOT5Fc4
        // ROcaqlYckVzdBq9sxezm6MYmDBjNAcibRwIDAQAB
        // -----END RSA PUBLIC KEY-----
    }
}