Set the Optional JWS Unprotected Header

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetUnprotectedHeader, which sets the optional unprotected header for a signature.

func chilkatTest() {
    var success: Bool = false

    let jws = CkoJws()!

    //  Protected header specifying HMAC-SHA256.
    let header = CkoJsonObject()!
    header.updateString(jsonPath: "alg", value: "HS256")
    success = jws.setProtectedHeader(index: 0, json: header)
    if success == false {
        print("\(jws.lastErrorText!)")
        return
    }

    //  Set the optional unprotected header for signature 0.  Unlike the protected header, it is not
    //  covered by the signature.  It is carried in the JSON serialization forms of a JWS.
    let unprotected = CkoJsonObject()!
    unprotected.updateString(jsonPath: "kid", value: "signer-key-1")
    success = jws.setUnprotectedHeader(index: 0, json: unprotected)
    if success == false {
        print("\(jws.lastErrorText!)")
        return
    }

    var bIncludeBom: Bool = false
    success = jws.setPayload(payload: "This is the content to sign.", charset: "utf-8", includeBom: bIncludeBom)
    if success == false {
        print("\(jws.lastErrorText!)")
        return
    }

    var base64Key: String? = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU="
    success = jws.setMacKey(index: 0, key: base64Key, encoding: "base64")
    if success == false {
        print("\(jws.lastErrorText!)")
        return
    }

    //  Because an unprotected header is present, the JWS is produced in a JSON serialization form.
    var jwsJson: String? = jws.create()
    if jws.lastMethodSuccess == false {
        print("\(jws.lastErrorText!)")
        return
    }

    print("\(jwsJson!)")

}