Sign a JWS with a Private Key

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetPrivateKey, which sets the private key used to create a signature. The example uses RS256 (RSASSA-PKCS1-v1_5 with SHA-256).

The file path is relative to the application's current working directory. An absolute path may also be used. Supply the path appropriate to your own environment.

bool success = false;

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

//  Protected header specifying RSASSA-PKCS1-v1_5 with SHA-256 (RS256).
Chilkat.JsonObject header = new Chilkat.JsonObject();
header.UpdateString("alg","RS256");
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;
}

//  The file path is relative to the application's current working directory.  An absolute path
//  may also be used.  Supply the path appropriate to your own environment.
//  Load the signer's private key and set it for signature 0.
Chilkat.PrivateKey privKey = new Chilkat.PrivateKey();
success = privKey.LoadPemFile("qa_data/signer_privkey.pem");
if (success == false) {
    Debug.WriteLine(privKey.LastErrorText);
    return;
}

success = jws.SetPrivateKey(0,privKey);
if (success == false) {
    Debug.WriteLine(jws.LastErrorText);
    return;
}

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

Debug.WriteLine(jwsCompact);