TLSCredProcessor.h

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/*
 * Copyright 2017-present Facebook, Inc.
 *
 * 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 <string>
#include <set>

#include <folly/Optional.h>
#include <wangle/ssl/TLSTicketKeySeeds.h>
#include <wangle/util/FilePoller.h>

namespace wangle {

class TLSCredProcessor {
 public:
  TLSCredProcessor();
  explicit TLSCredProcessor(std::chrono::milliseconds pollInterval);

  ~TLSCredProcessor();

  void setTicketPathToWatch(const std::string& ticketFile);

  void setCertPathsToWatch(std::set<std::string> certFiles);

  void addTicketCallback(
      std::function<void(wangle::TLSTicketKeySeeds)> callback);
  void addCertCallback(std::function<void()> callback);

  void stop();

  void setPollInterval(std::chrono::milliseconds pollInterval);

  static folly::Optional<wangle::TLSTicketKeySeeds> processTLSTickets(
      const std::string& fileName);

 private:
  void ticketFileUpdated(const std::string& ticketFile) noexcept;
  void certFileUpdated() noexcept;

  std::unique_ptr<FilePoller> poller_;
  std::string ticketFile_;
  std::set<std::string> certFiles_;
  std::vector<std::function<void(wangle::TLSTicketKeySeeds)>> ticketCallbacks_;
  std::vector<std::function<void()>> certCallbacks_;
};
}