ec_util.hpp

// Copyright 2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once

#include "google3/host_commands.h"

#include "ec_util_interface.hpp"
#include "host_command.hpp"

namespace google
{
namespace hoth
{
namespace internal
{

class EcUtilImpl : public EcUtil
{
  public:
    explicit EcUtilImpl(HostCommand* hostCmd) : hostCmd(hostCmd)
    {}

    // Get the Hoth statistics by issuing an EC_PRV_CMD_HOTH_GET_STATISTICS
    // Command.
    ec_response_statistics getHothStatistics() const override;

    // Get the Hoth persistent panic info by issuing a series of
    // EC_PRV_CMD_HOTH_PERSISTENT_PANIC_INFO commands.
    std::optional<ec_response_persistent_panic_info>
        getHothPersistentPanicInfo() const;

    // Check the presence of Hoth peresistent panic info by issuing a single
    // EC_PRV_CMD_HOTH_PERSISTENT_PANIC_INFO command.
    bool checkHothPersistentPanicInfo() const override;

    // Get the Hoth auth record.
    // Only supports record id = 0, which is the only one currently used.
    ec_authz_record_get_response getHothAuthRecord() const override;

  private:
    [[nodiscard]] static std::span<const uint8_t>
    getResponseBody(std::vector<uint8_t> &response);

    /** @brief Connection to Hoth for sending and receiving host commands */
    HostCommand* hostCmd;
};

} // namespace internal

} // namespace hoth

} // namespace google