Chrome OS uWeave Characteristics Server

components/proximity_auth/ble/bluetooth_low_energy_eid_generator.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_WEAVE_EID_GENERATOR_H_
+#define COMPONENTS_PROXIMITY_AUTH_BLE_BLUETOOTH_LOW_ENERGY_WEAVE_EID_GENERATOR_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <memory>
+
+#include "components/proximity_auth/remote_device.h"
+
+namespace proximity_auth {
+namespace weave {
+
+// Represent a EID generator for a single device.
+// EID is ephemeral id needed to be included for the advertisement for security
+// and privacy reasons.
+// It has the repsonsiblity of getting the correct EID seed out of the
+// RemoteDevice and encode the seed with the timestamp to get the EID
+class BluetoothLowEnergyEidGenerator {
+ public:
+  class Factory {
+   public:
+    // TODO(jingxuy): this is just stop compiler from complaining.
+    static std::unique_ptr<BluetoothLowEnergyEidGenerator> NewInstance() {
+      return std::unique_ptr<BluetoothLowEnergyEidGenerator>(
+          new BluetoothLowEnergyEidGenerator());
+    }
+
+    // Exposed for testing.
+    static void SetInstanceForTesting(Factory* factory);
+
+   protected:
+    // Exposed for testing.
+    virtual std::unique_ptr<BluetoothLowEnergyEidGenerator> BuildInstance();
+
+   private:
+    static Factory* factory_instance_;
+  };
+
+  typedef std::vector<uint8_t> AdvertisementContent;
+
+  // TODO(tether-dev): Make this actually generate EID.
+  // This function should look at the time and get the correct seed out of the
+  // remote device and use this seed to generate the EID.
+  AdvertisementContent GetAdvertisementContent(const RemoteDevice& device,
+                                               std::string public_key) {
+    std::vector<uint8_t> rtn{1, 2, 3, 4};
+    return rtn;
+  }
+
+ protected:
+  BluetoothLowEnergyEidGenerator(){};
+};
+
+}  // namespace weave
+
+}  // namespace proximity_auth
+
+#endif