Node.js

Apple Keychain - Create RSA Signature

See more Apple Keychain Examples

Using an RSA private key stored in the Apple Keychain, create a signature by signing the SHA-256 hash of the provided string, then return the signature encoded in Base64 format.

Note: This example requires Chilkat v10.0.0 or greater.

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();

    // On MacOS and iOS, the LoadByCommonName function will search the Apple Keychain for the matching certificate.

    // A digital certificate's Common Name (CN) is a field in the certificate that specifies the name of the entity the 
    // certificate is issued to. It is often used to identify the domain name, hostname, or organization the certificate represents. 

    // For example:
    // - In an SSL/TLS certificate for a website, the CN typically contains the domain name (e.g., "www.example.com").
    // - For certificates representing individuals or organizations, the CN might include the person's name or the organization's name.

    // The CN is part of the certificate's Subject field and is crucial for verifying that the certificate corresponds 
    // to the intended entity, especially in SSL/TLS communications.

    success = cert.LoadByCommonName("Example, Inc.");
    if (success == false) {
        console.log(cert.LastErrorText);
        return;
    }

    var rsa = new chilkat.Rsa();
    success = rsa.SetX509Cert(cert,true);
    if (success == false) {
        console.log(rsa.LastErrorText);
        return;
    }

    // Generate an RSA signature by signing the SHA-256 hash of the provided string, 
    // then return the signature encoded in Base64 format.
    rsa.EncodingMode = "base64";
    var sigBase64 = rsa.SignStringENC("to be signed","sha256");
    if (rsa.LastMethodSuccess == false) {
        console.log(rsa.LastErrorText);
        return;
    }

    console.log("RSA Signature:");
    console.log(sigBase64);

}

chilkatExample();