src/connectivity/weave/adaptation/group_key_store_impl.h

// Copyright 2020 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.

#ifndef SRC_CONNECTIVITY_WEAVE_ADAPTATION_GROUP_KEY_STORE_IMPL_H_
#define SRC_CONNECTIVITY_WEAVE_ADAPTATION_GROUP_KEY_STORE_IMPL_H_

#include <vector>

#pragma GCC diagnostic push
#include <Weave/Core/WeaveKeyIds.h>
#include <Weave/DeviceLayer/internal/WeaveDeviceLayerInternal.h>
#include <Weave/Profiles/security/WeaveApplicationKeys.h>
#pragma GCC diagnostic pop

#include "src/connectivity/weave/adaptation/environment_config.h"

namespace nl::Weave::DeviceLayer::Internal {

/**
 * An implementation of the Weave GroupKeyStoreBase API for the Fuchsia.
 */
class GroupKeyStoreImpl final : public ::nl::Weave::Profiles::Security::AppKeys::GroupKeyStoreBase {
  using WeaveGroupKey = ::nl::Weave::Profiles::Security::AppKeys::WeaveGroupKey;

 public:
  static constexpr uint8_t kMaxGroupKeys =
      WEAVE_CONFIG_MAX_APPLICATION_EPOCH_KEYS +  // Maximum number of Epoch keys
      WEAVE_CONFIG_MAX_APPLICATION_GROUPS +      // Maximum number of Application Group Master keys
      1 +  // Maximum number of Root keys (1 for Service root key)
      1;   // Fabric secret

  WEAVE_ERROR Init();

  WEAVE_ERROR RetrieveGroupKey(uint32_t key_id, WeaveGroupKey& key) override;
  WEAVE_ERROR StoreGroupKey(const WeaveGroupKey& key) override;
  WEAVE_ERROR DeleteGroupKey(uint32_t key_id) override;
  WEAVE_ERROR DeleteGroupKeysOfAType(uint32_t key_type) override;
  WEAVE_ERROR EnumerateGroupKeys(uint32_t key_type, uint32_t* key_ids, uint8_t key_ids_array_size,
                                 uint8_t& key_count) override;
  WEAVE_ERROR Clear(void) override;
  WEAVE_ERROR RetrieveLastUsedEpochKeyId(void) override;
  WEAVE_ERROR StoreLastUsedEpochKeyId(void) override;

 private:
  static WEAVE_ERROR FormKeyName(uint32_t key_id, char* key_name, size_t key_name_size);
  WEAVE_ERROR DeleteGroupKey(uint32_t key_id, bool update_index);
  WEAVE_ERROR AddKeyToIndex(uint32_t key_id);
  WEAVE_ERROR RemoveKeyFromIndex(uint32_t key_id);
  WEAVE_ERROR StoreKeyIndex(void);

  std::vector<uint32_t> key_index_;
};

}  // namespace nl::Weave::DeviceLayer::Internal

#endif  // SRC_CONNECTIVITY_WEAVE_ADAPTATION_GROUP_KEY_STORE_IMPL_H_