dom/quota/NSSCipherStrategy.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_dom_quota_NSSCipherStrategy_h
   8 #define mozilla_dom_quota_NSSCipherStrategy_h
   9
  10 #include "CipherStrategy.h"
  11
  12 #include <cstddef>
  13 #include <cstdint>
  14 #include "mozilla/InitializedOnce.h"
  15 #include "mozilla/Result.h"
  16 #include "mozilla/Span.h"
  17 #include "ErrorList.h"
  18 #include "nsTArray.h"
  19
  20 #include "ScopedNSSTypes.h"
  21
  22 #include <array>
  23
  24 namespace mozilla::dom::quota {
  25
  26 struct NSSCipherStrategy {
  27   // Use numeric literals here to avoid having to include NSS headers here.
  28   // static_assert's in the cpp file check their consistency.
  29   using KeyType = std::array<uint8_t, 32>;
  30   static constexpr size_t BlockPrefixLength = 32;
  31   static constexpr size_t BasicBlockSize = 16;
  32
  33   static Result<KeyType, nsresult> GenerateKey();
  34
  35   nsresult Init(CipherMode aCipherMode, Span<const uint8_t> aKey,
  36                 Span<const uint8_t> aInitialIv = Span<const uint8_t>{});
  37
  38   nsresult Cipher(Span<uint8_t> aIv, Span<const uint8_t> aIn,
  39                   Span<uint8_t> aOut);
  40
  41   static std::array<uint8_t, BlockPrefixLength> MakeBlockPrefix();
  42
  43   static Span<const uint8_t> SerializeKey(const KeyType& aKey);
  44
  45   static Maybe<KeyType> DeserializeKey(
  46       const Span<const uint8_t>& aSerializedKey);
  47
  48  private:
  49   // XXX Remove EarlyDestructible, remove moving of the CipherStrategy.
  50   LazyInitializedOnceEarlyDestructible<const CipherMode> mMode;
  51   LazyInitializedOnceEarlyDestructible<const UniquePK11Context> mPK11Context;
  52   nsTArray<uint8_t> mIv;
  53 };
  54
  55 }  // namespace mozilla::dom::quota
  56
  57 #endif