Load and Validate a JWS from a String

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.LoadJws, which loads a JWS from its compact serialization string. The example then supplies the MAC key and validates the signature.

var success = false;

var jws = new CkJws();

//  Load the JWS compact serialization.
var jwsCompact = "eyJhbGciOiJIUzI1NiJ9.VGhpcyBpcyB0aGUgY29udGVudCB0byBzaWduLg.<signature>";
success = jws.LoadJws(jwsCompact);
if (success == false) {
    console.log(jws.LastErrorText);
    return;
}

//  Provide the HMAC key for signer 0, then validate the signature.  Validate returns 1 when the
//  signature is cryptographically valid, 0 when it is not, or a negative value on error.
var base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=";
success = jws.SetMacKey(0,base64Key,"base64");
if (success == false) {
    console.log(jws.LastErrorText);
    return;
}

var v = jws.Validate(0);
if (v < 0) {
    console.log(jws.LastErrorText);
    return;
}

if (v !== 1) {
    console.log("The signature is not valid.");
    return;
}

console.log("The signature is valid.");