drivers/bluetooth/lib/hci/link_key.h

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#pragma once

#include <cstdint>

#include "garnet/drivers/bluetooth/lib/common/uint128.h"

namespace btlib {
namespace hci {

// Represents a key used to encrypt a link.
class LinkKey final {
 public:
  LinkKey();
  LinkKey(const common::UInt128& value, uint64_t rand, uint16_t ediv);

  // 128-bit BR/EDR link key, LE Long Term Key, or LE Short Term key.
  const common::UInt128& value() const { return value_; }

  // Encrypted diversifier and random values used to identify the LTK. These
  // values are set to 0 for the LE Legacy STK, LE Secure Connections LTK, and
  // BR/EDR Link Key.
  uint64_t rand() const { return rand_; }
  uint16_t ediv() const { return ediv_; }

 private:
  common::UInt128 value_;
  uint64_t rand_;
  uint16_t ediv_;
};

}  // namespace hci
}  // namespace btlib