(JavaScript) RSA Signature with Certificate's Private Key from PFX

See more RSA Examples

Note: This example requires Chilkat v11.0.0 or greater.

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.

// Create an instance of a certificate store object, load a PFX file,
// locate the certificate we need, and use it for signing.
// (a PFX file may contain more than one certificate.)
var certStore = new CkCertStore();

// The 1st argument is the filename, the 2nd arg is the 
// PFX file's password:
success = certStore.LoadPfxFile("chilkat.pfx","test");
if (success == false) {
    console.log(certStore.LastErrorText);
    return;
}

// Find the certificate by the subject common name:
var jsonCN = new CkJsonObject();
jsonCN.UpdateString("CN","cert common name");

var cert = new CkCert();
success = certStore.FindCert(jsonCN,cert);
if (success == false) {
    console.log(certStore.LastErrorText);
    return;
}

var privKey = new CkPrivateKey();
success = cert.GetPrivateKey(privKey);
if (success == false) {
    console.log(cert.LastErrorText);
    return;
}

var rsa = new CkRsa();

success = rsa.UsePrivateKey(privKey);
if (success == false) {
    console.log(rsa.LastErrorText);
    return;
}

// Encode the signature as a hex string
rsa.EncodingMode = "hex";

var strData = "This is the string to be signed.";

// Sign the string using the sha-1 hash algorithm.
// Other valid choices are "sha-256", "md2" and "md5".
var hexSig = rsa.SignStringENC(strData,"sha-1");

console.log(hexSig);

console.log("Success!");