Set JWE Additional Authenticated Data from BinData

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.SetAadBd, which sets external Additional Authenticated Data (AAD) to the exact bytes held in a BinData.

    success := false

    jwe := chilkat.NewJwe()

    //  Protected header: AES key-wrap with AES-256-GCM content encryption.
    header := chilkat.NewJsonObject()
    header.UpdateString("alg","A256KW")
    header.UpdateString("enc","A256GCM")
    success = jwe.SetProtectedHeader(header)
    if success == false {
        fmt.Println(jwe.LastErrorText())
        jwe.DisposeJwe()
        header.DisposeJsonObject()
        return
    }

    //  The 256-bit key-wrapping key (base64) for recipient index 0.  In production, obtain the key from a
    //  secure source rather than hard-coding it.
    base64Key := "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU="
    success = jwe.SetWrappingKey(0,base64Key,"base64")
    if success == false {
        fmt.Println(jwe.LastErrorText())
        jwe.DisposeJwe()
        header.DisposeJsonObject()
        return
    }

    //  Set external Additional Authenticated Data (AAD) to the exact bytes in a BinData.  Passing an empty
    //  BinData clears any previously configured AAD.
    bdAad := chilkat.NewBinData()
    bdAad.AppendString("context-info-v1","utf-8")
    success = jwe.SetAadBd(bdAad)
    if success == false {
        fmt.Println(jwe.LastErrorText())
        jwe.DisposeJwe()
        header.DisposeJsonObject()
        bdAad.DisposeBinData()
        return
    }

    sbContent := chilkat.NewStringBuilder()
    sbContent.Append("This is the secret content.")
    sbJwe := chilkat.NewStringBuilder()
    success = jwe.EncryptSb(sbContent,"utf-8",sbJwe)
    if success == false {
        fmt.Println(jwe.LastErrorText())
        jwe.DisposeJwe()
        header.DisposeJsonObject()
        bdAad.DisposeBinData()
        sbContent.DisposeStringBuilder()
        sbJwe.DisposeStringBuilder()
        return
    }

    fmt.Println(*sbJwe.GetAsString())

    jwe.DisposeJwe()
    header.DisposeJsonObject()
    bdAad.DisposeBinData()
    sbContent.DisposeStringBuilder()
    sbJwe.DisposeStringBuilder()