Create a JWS into a StringBuilder

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.CreateJwsSb, which creates a JWS and writes it into a StringBuilder.

Background. JWS (JSON Web Signature) integrity-protects a payload with a signature or MAC. The header alg names the algorithm; this example uses HMAC-SHA256 (HS256) with a symmetric MAC key.

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    success := false

    jws := chilkat.NewJws()

    //  Set the protected header for signer 0, specifying the signature algorithm (alg).
    header := chilkat.NewJsonObject()
    header.UpdateString("alg","HS256")
    success = jws.SetProtectedHeader(0,header)
    if success == false {
        fmt.Println(jws.LastErrorText())
        jws.DisposeJws()
        header.DisposeJsonObject()
        return
    }

    //  Set the payload to be signed.
    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
    }

    //  Provide the HMAC key (base64) for signer 0.  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
    }

    //  Create the JWS and write it into a StringBuilder.
    sbJws := chilkat.NewStringBuilder()
    success = jws.CreateJwsSb(sbJws)
    if success == false {
        fmt.Println(jws.LastErrorText())
        jws.DisposeJws()
        header.DisposeJsonObject()
        sbJws.DisposeStringBuilder()
        return
    }

    fmt.Println(*sbJws.GetAsString())

    jws.DisposeJws()
    header.DisposeJsonObject()
    sbJws.DisposeStringBuilder()