(JavaScript) PC/SC Get Card UID

See more SCard Examples

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var success = false;

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

var scard = new CkSCard();

// First establish a context to the PC/SC Resource Manager
success = scard.EstablishContext("user");
if (success == false) {
    console.log(scard.LastErrorText);
    return;
}

// Use your own smart card reader name here.
success = scard.Connect("ACS ACR122 0","shared","no_preference");
if (success == false) {
    console.log(scard.LastErrorText);
    return;
}

console.log("Connected reader: " + scard.ConnectedReader);
console.log("Active protocol: " + scard.ActiveProtocol);
console.log("ATR: " + scard.CardAtr);
console.log("Reader Status: " + scard.ReaderStatus);

//  Send the APDU command 0xFF, 0xCA, 0x00, 0x00, 0x00
var bdRecv = new CkBinData();
success = scard.TransmitHex(scard.ActiveProtocol,"FFCA000000",bdRecv,32);
if (success == true) {

    console.log("Received: " + bdRecv.GetEncoded("hex"));

    // The UID is the returned data without the final 2 bytes.
    var numBytes = bdRecv.NumBytes;
    if (numBytes > 2) {
        console.log("UID: " + bdRecv.GetEncodedChunk(0,numBytes - 2,"hex"));
    }

}
else {
    console.log(scard.LastErrorText);
}

// Disconnect from this reader.
success = scard.Disconnect("leave");
if (success == false) {
    console.log(scard.LastErrorText);
}

// Applications should always release the context when finished.
success = scard.ReleaseContext();
if (success == false) {
    console.log(scard.LastErrorText);
}