Node.js

RSA Sign using a Private Key on a USB Token or Smartcard

See more Apple Keychain Examples

Create an RSA signature using a private key stored on a USB token or smartcard.

Note: On MacOS and iOS, this example requires Chilkat v10.1.2 or later when the Apple Keychain is used as the underlying means to do the signing.

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    // Assuming the smartcard/USB token is installed with the correct drivers from the manufacturer,
    // this code can work on multiple platforms including Windows, MacOS, Linux, and iOS.

    // Chilkat automatically detects and determines the way in which the HSM is used,
    // which can be by PKCS11, Apple Keychain, Microsoft CNG / Crypto API, or ScMinidriver.

    var cert = new chilkat.Cert();

    // Set the token/smartcard PIN prior to loading.
    cert.SmartCardPin = "123456";

    // Specify the certificate by its common name.
    success = cert.LoadFromSmartcard("cn=chilkat-rsa-2048");
    if (success == false) {
        console.log(cert.LastErrorText);
        return;
    }

    console.log("Signing with cert: " + cert.SubjectCN);

    // Create data to be hashed and signed.
    var bd = new chilkat.BinData();
    var i;
    for (i = 0; i <= 100; i++) {
        bd.AppendEncoded("000102030405060708090A0B0C0D0E0F","hex");
    }

    var rsa = new chilkat.Rsa();

    // Use the certificate's private key for signing.
    success = rsa.SetX509Cert(cert,true);
    if (success == false) {
        console.log(rsa.LastErrorText);
        return;
    }

    // Sign the SHA-256 hash of the contents of bd.
    var bdSig = new chilkat.BinData();
    success = rsa.SignBd(bd,"sha256",bdSig);
    if (success == false) {
        console.log(rsa.LastErrorText);
        return;
    }

    // The RSA signature is equal in length to the size of the RSA key.
    console.log("Output signature size in bits = " + (bdSig.NumBytes * 8));

    // We can save the signature for later verification..
    bdSig.WriteFile("rsaSignatures/test1.sig");

    // See the example to verify the RSA signature:
    // Verfies an RSA Signature

}

chilkatExample();