gecko-dev/dom/prio/PrioEncoder.h

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_PrioEncoder_h
#define mozilla_dom_PrioEncoder_h

#include "mozilla/dom/PrioEncoderBinding.h"
#include "mozilla/dom/RootedDictionary.h"

class nsIGlobalObject;
using SECKEYPublicKey = struct SECKEYPublicKeyStr;
using PublicKey = SECKEYPublicKey*;

namespace mozilla {
namespace dom {

class PrioEncoder {
 public:
  NS_INLINE_DECL_REFCOUNTING(PrioEncoder)

  // C++ API
  static nsresult EncodeNative(const nsCString& aBatchID,
                               const nsTArray<bool>& aData, nsCString& aResult,
                               nsCString& bResult);

  // DOM API
  static void Encode(GlobalObject& aGlobal, const nsCString& aBatchID,
                     const PrioParams& aPrioParams,
                     RootedDictionary<PrioEncodedData>& aData,
                     ErrorResult& aRv);

  // maximum number of booleans that can be prio-encoded in a single batch.
  const static uint32_t gNumBooleans = 2046;

  // Set (or, by passing nullptrs, reset) the keys used to encode the payloads.
  static nsresult SetKeys(const char* aKeyA = nullptr,
                          const char* aKeyB = nullptr);

 private:
  PrioEncoder();
  ~PrioEncoder();

  static PublicKey sPublicKeyA;

  static PublicKey sPublicKeyB;

  static StaticRefPtr<PrioEncoder> sSingleton;

  static bool IsValidHexPublicKey(mozilla::Span<const char>);

  static nsresult LazyInitSingleton();
};

}  // namespace dom
}  // namespace mozilla

#endif  // mozilla_dom_PrioEncoder_h