JavaScript

Generate an RSA Key and Get as Base64 DER

See more RSA Examples

Demonstrates how to generate a 2048-bit RSA key and return the public and private parts as unencrypted Base64 encoded DER. JavaScript

var success = false;

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

var rsa = new CkRsa();

// Generate a 2048-bit key.
var privKey = new CkPrivateKey();
success = rsa.GenKey(2048,privKey);
if (success == false) {
    console.log(rsa.LastErrorText);
    return;
}

// Get the public part of the key.
var pubKey = new CkPublicKey();
privKey.ToPublicKey(pubKey);

// There are two possible formats for representing the RSA public key 
// in ASN.1 (DER).  The possible formats are PKCS1 and PKCS8.
// We can get either by setting bChoosePkcs1 to true or false.
var bChoosePkcs1 = true;
var pubKeyBase64Der = pubKey.GetEncoded(bChoosePkcs1,"base64");
console.log("Public Key Base64 DER:");
console.log(pubKeyBase64Der);

// Get the private key as Base64 DER:
// We can get PKCS1 or PKCS8, but with different methods:
var privKeyPkcs1 = privKey.GetPkcs1ENC("base64");
console.log("Private Key PKCS1 Base64 DER:");
console.log(privKeyPkcs1);

var privKeyPkcs8 = privKey.GetPkcs8ENC("base64");
console.log("Private Key PKCS8 Base64 DER:");
console.log(privKeyPkcs8);