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.

    success := false

    jws := chilkat.NewJws()

    //  Protected header specifying HMAC-SHA256.
    header := chilkat.NewJsonObject()
    header.UpdateString("alg","HS256")
    success = jws.SetProtectedHeader(0,header)
    if success == false {
        fmt.Println(jws.LastErrorText())
        jws.DisposeJws()
        header.DisposeJsonObject()
        return
    }

    bIncludeBom := false
    success = jws.SetPayload("This is the content to sign.","utf-8",bIncludeBom)
    if success == false {
        fmt.Println(jws.LastErrorText())
        jws.DisposeJws()
        header.DisposeJsonObject()
        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.
    base64Key := "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU="
    success = jws.SetMacKey(0,base64Key,"base64")
    if success == false {
        fmt.Println(jws.LastErrorText())
        jws.DisposeJws()
        header.DisposeJsonObject()
        return
    }

    jwsCompact := jws.CreateJws()
    if jws.LastMethodSuccess() == false {
        fmt.Println(jws.LastErrorText())
        jws.DisposeJws()
        header.DisposeJsonObject()
        return
    }

    fmt.Println(*jwsCompact)

    jws.DisposeJws()
    header.DisposeJsonObject()