JavaScript

Load a JWE from a String

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.LoadJwe, which loads a JWE from its compact serialization string so it can be decrypted.

Background. JWE (JSON Web Encryption) protects content with a content-encryption algorithm (the header enc value) while the content-encryption key is managed by the key-management algorithm (the header alg value). This example uses AES key wrapping with a symmetric 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();

//  Load a JWE from its compact serialization string.
var jweCompact = "eyJhbGciOiJBMjU2S1ciLCJlbmMiOiJBMjU2R0NNIn0.<...>.<iv>.<ciphertext>.<tag>";
success = jwe.LoadJwe(jweCompact);
if (success == false) {
    console.log(jwe.LastErrorText);
    return;
}

//  The 256-bit key-wrapping key (base64) for recipient index 0.  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;
}

//  The loaded JWE can now be decrypted.
var content = jwe.Decrypt(0,"utf-8");
if (jwe.LastMethodSuccess == false) {
    console.log(jwe.LastErrorText);
    return;
}

console.log(content);