Sign a JWS with an HMAC Key

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetMacKey, which sets the symmetric MAC key for a signature. The key bytes are supplied in a named encoding such as hex or base64.

bool success = false;

Chilkat.Jws jws = new Chilkat.Jws();

//  Protected header specifying HMAC-SHA256.
Chilkat.JsonObject header = new Chilkat.JsonObject();
header.UpdateString("alg","HS256");
success = jws.SetProtectedHeader(0,header);
if (success == false) {
    Debug.WriteLine(jws.LastErrorText);
    return;
}

bool bIncludeBom = false;
success = jws.SetPayload("This is the content to sign.","utf-8",bIncludeBom);
if (success == false) {
    Debug.WriteLine(jws.LastErrorText);
    return;
}

//  Set the symmetric MAC key for signature 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.
string base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=";
success = jws.SetMacKey(0,base64Key,"base64");
if (success == false) {
    Debug.WriteLine(jws.LastErrorText);
    return;
}

string jwsCompact = jws.CreateJws();
if (jws.LastMethodSuccess == false) {
    Debug.WriteLine(jws.LastErrorText);
    return;
}

Debug.WriteLine(jwsCompact);