(JavaScript) Generate a Random 256-bit AES Key and RSA Encrypt

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;

// The RSA public key is used for encryption, and the private key for decryption.

// The public key's role is to make encryption accessible to anyone while ensuring that
// only the private key holder can decrypt the messages.
// The public key is designed to be widely distributed so anyone can use it to encrypt messages
// intended for the owner of the private key.

// Load our 2048-bit RSA public key.
var pubKey = new CkPublicKey();
// In all Chilkat methods expecting a path, you pass either absolute or relative paths.
success = pubKey.LoadFromFile("rsaKeys/Test2048Rsa.pem");
if (success == false) {
    console.log(pubKey.LastErrorText);
    return;
}

var rsa = new CkRsa();

// Tell RSA to use the public key.
rsa.UsePublicKey(pubKey);

// Generate a random 256-bit AES key (32 bytes)
var bdAesKey = new CkBinData();
var prng = new CkPrng();
prng.GenRandomBd(32,bdAesKey);

// RSA encrypt.
rsa.EncryptBd(bdAesKey,false);

// Save the RSA encrypted AES key to a file.
success = bdAesKey.WriteFile("rsaEncrypted/myAes.key");