Node.js

Load Certificate from Smart Card by Key Usage

See more Certificates Examples

You may have a smartcard or USB token that contains only 2 certificates, one for signing, and one for authentication, and you wish to load the certificate for signing. This example demonstrates how to load the 1st certificate found on a smartcard that matches the intended key usage. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    var cert = new chilkat.Cert();

    //  If you know the smart card PIN, set it prior to loading from the smartcard/USB token.
    cert.SmartCardPin = "12345678";

    //  To load a certificate matching an intended key usage, specify the type of usage as shown below.
    //  
    //  The possible key usage keywords are:
    //  
    //  digitalsignature
    //  Use when the public key is used with a digital signature mechanism to support security services other than non-repudiation, certificate signing, or CRL signing. 
    //  A digital signature is often used for entity authentication and data origin authentication with integrity.

    //  nonrepudiation
    //  When a digital certificate's key usage includes "nonrepudiation," it implies that the certificate and its associated private key can be used to 
    //  create digital signatures that provide proof of the origin and integrity of the signed data, and the signer cannot later deny having signed the data.

    //  Other less common usages:

    //  certificatesigning
    //  keyencipherment
    //  dataencipherment
    //  crlsigning
    //  secureemail
    //  serverauthentication
    //  clientauthentication
    //  codesigning
    //  timestamping

    success = cert.LoadFromSmartcard("keyusage=nonrepudiation");
    if (success == false) {
        console.log(cert.LastErrorText);
        console.log("Certificate not loaded.");
        return;
    }

    console.log("Found: " + cert.SubjectDN + " serial=" + cert.SerialNumber);

}

chilkatExample();