package browserbiometrics import ( "bytes" "encoding/binary" "encoding/json" "os" "unsafe" "github.com/quexten/goldwarden/browserbiometrics/logging" ) const bufferSize = 8192 * 8 var nativeEndian binary.ByteOrder func setupCommunication() { // determine native endianess var one int16 = 1 b := (*byte)(unsafe.Pointer(&one)) if *b == 0 { nativeEndian = binary.BigEndian } else { nativeEndian = binary.LittleEndian } } func dataToBytes(msg SendMessage) []byte { byteMsg, err := json.Marshal(msg) if err != nil { logging.Panicf("Unable to marshal OutgoingMessage struct to slice of bytes: " + err.Error()) } return byteMsg } func writeMessageLength(msg []byte) { err := binary.Write(os.Stdout, nativeEndian, uint32(len(msg))) if err != nil { logging.Panicf("Unable to write message length to Stdout: " + err.Error()) } } func readMessageLength(msg []byte) int { var length uint32 buf := bytes.NewBuffer(msg) err := binary.Read(buf, nativeEndian, &length) if err != nil { logging.Panicf("Unable to read bytes representing message length:" + err.Error()) } return int(length) } func send(msg SendMessage) { byteMsg := dataToBytes(msg) logging.Debugf("[SENSITIVE] Sending message: " + string(byteMsg)) writeMessageLength(byteMsg) var msgBuf bytes.Buffer _, err := msgBuf.Write(byteMsg) if err != nil { logging.Panicf(err.Error()) } _, err = msgBuf.WriteTo(os.Stdout) if err != nil { logging.Panicf(err.Error()) } }