JavaScript

Encrypt a JWE with a Symmetric Wrapping Key

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.SetWrappingKey, which sets the symmetric key-wrapping key for a recipient. The key bytes are supplied in a named encoding such as hex or base64.

Background. AES key wrapping protects the content-encryption key with a shared symmetric key. Both parties must possess the same wrapping key.

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.

JavaScript

var success = false;

var jwe = new CkJwe();

//  Protected header: AES key-wrap with AES-256-GCM content encryption.
var header = new CkJsonObject();
header.UpdateString("alg","A256KW");
header.UpdateString("enc","A256GCM");
success = jwe.SetProtectedHeader(header);
if (success == false) {
    console.log(jwe.LastErrorText);
    return;
}

//  Set the symmetric key-wrapping key for recipient 0.  The key bytes are provided in the named
//  encoding (here base64).  In production, obtain the key from a secure source rather than hard-coding
//  it.
var base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=";
success = jwe.SetWrappingKey(0,base64Key,"base64");
if (success == false) {
    console.log(jwe.LastErrorText);
    return;
}

var jweCompact = jwe.Encrypt("This is the secret content.","utf-8");
if (jwe.LastMethodSuccess == false) {
    console.log(jwe.LastErrorText);
    return;
}

console.log(jweCompact);