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/* -*- 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_quota_NSSCipherStrategy_h
#define mozilla_dom_quota_NSSCipherStrategy_h
#include <array>
#include <cstddef>
#include <cstdint>
#include "CipherStrategy.h"
#include "ErrorList.h"
#include "ScopedNSSTypes.h"
#include "mozilla/InitializedOnce.h"
#include "mozilla/Result.h"
#include "mozilla/Span.h"
#include "nsTArray.h"
namespace mozilla::dom::quota {
struct NSSCipherStrategy {
// Use numeric literals here to avoid having to include NSS headers here.
// static_assert's in the cpp file check their consistency.
using KeyType = std::array<uint8_t, 32>;
static constexpr size_t BlockPrefixLength = 32;
static constexpr size_t BasicBlockSize = 16;
static Result<KeyType, nsresult> GenerateKey();
nsresult Init(CipherMode aCipherMode, Span<const uint8_t> aKey,
Span<const uint8_t> aInitialIv = Span<const uint8_t>{});
nsresult Cipher(Span<uint8_t> aIv, Span<const uint8_t> aIn,
Span<uint8_t> aOut);
static std::array<uint8_t, BlockPrefixLength> MakeBlockPrefix();
static Span<const uint8_t> SerializeKey(const KeyType& aKey);
static Maybe<KeyType> DeserializeKey(
const Span<const uint8_t>& aSerializedKey);
private:
// XXX Remove EarlyDestructible, remove moving of the CipherStrategy.
LazyInitializedOnceEarlyDestructible<const CipherMode> mMode;
LazyInitializedOnceEarlyDestructible<const UniquePK11Context> mPK11Context;
nsTArray<uint8_t> mIv;
};
} // namespace mozilla::dom::quota
#endif
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