Set the JWS Protected Header

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Demonstrates Jws.SetProtectedHeader, which sets the integrity-protected header for a signer from a JsonObject. The header specifies the signature algorithm (alg).

Background. The protected header is covered by the signature, so it cannot be altered without invalidating the JWS. It is configured before creating the JWS.

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bool success = false;

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

//  Build the JWS protected header.  The "alg" member names the signature algorithm.
Chilkat.JsonObject header = new Chilkat.JsonObject();
header.UpdateString("alg","HS256");

//  Set the protected header for signer index 0.  The protected header is integrity-protected: it is
//  covered by the signature.
success = jws.SetProtectedHeader(0,header);
if (success == false) {
    Debug.WriteLine(jws.LastErrorText);
    return;
}

Debug.WriteLine("Protected header set.");