JavaScript

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. JavaScript

var success = false;

// 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:

// (image:https://example-code.com/images/gemalto_idprime_after_key_import.JPG/endImage)

var scmd = new CkScMinidriver();

// 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
var readerName = "Alcor Micro USB Smart Card Reader 0";
success = scmd.AcquireContext(readerName);
if (success == false) {
    console.log(scmd.LastErrorText);
    return;
}

// If successful, the name of the currently inserted smart card is available:
console.log("Card name: " + scmd.CardName);

// 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.
var pubkey_sig = new CkPublicKey();
var pubkey_kex = new CkPublicKey();

success = scmd.GetContainerKeys(7,pubkey_sig,pubkey_kex);
if (success == false) {
    console.log(scmd.LastErrorText);
    return;
}

if (pubkey_sig.Empty == true) {
    console.log("No signature key is present.");
}
else {
    console.log("Signature key:");
    console.log(pubkey_sig.GetPem(true));
}

if (pubkey_kex.Empty == true) {
    console.log("No Key Exchange key is present.");
}
else {
    console.log("Key Exchange key:");
    console.log(pubkey_kex.GetPem(true));
}

scmd.DeleteContext();

console.log("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-----