Node.js

RSA Sign utf-8 Bytes of String to get Base64 RSA Signature

See more Apple Keychain Examples

Demonstrates how RSA sign the utf-8 byte representation of a string to get the signature in base64 format. 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 a string to be hashed and signed.
    var sb = new chilkat.StringBuilder();
    var crlfLineEnding = true;
    var i;
    for (i = 0; i <= 10; i++) {
        sb.AppendLine("This is a test.",crlfLineEnding);
    }

    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 utf-8 byte representation of the contents of sb
    // Return the signature in base64 format.
    rsa.EncodingMode = "base64";
    rsa.Charset = "utf-8";
    var stringToSign = sb.GetAsString();
    var sigBase64 = rsa.SignStringENC(stringToSign,"sha256");
    if (rsa.LastMethodSuccess == false) {
        console.log(rsa.LastErrorText);
        return;
    }

    console.log("RSA signature as base64: " + sigBase64);

}

chilkatExample();