dom/quota/DummyCipherStrategy.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_DummyCipherStrategy_h
   8 #define mozilla_dom_quota_DummyCipherStrategy_h
   9
  10 #include <algorithm>
  11 #include <array>
  12 #include <cstddef>
  13 #include <cstdint>
  14 #include <utility>
  15 #include "ErrorList.h"
  16 #include "mozilla/Result.h"
  17 #include "mozilla/Span.h"
  18 #include "mozilla/dom/quota/CipherStrategy.h"
  19
  20 namespace mozilla::dom::quota {
  21
  22 struct DummyCipherStrategy {
  23   struct KeyType {};
  24
  25   static constexpr size_t BlockPrefixLength = 8;
  26   static constexpr size_t BasicBlockSize = 4;
  27
  28   static void DummyTransform(Span<const uint8_t> aIn, Span<uint8_t> aOut) {
  29     std::transform(aIn.cbegin(), aIn.cend(), aOut.begin(),
  30                    [](const uint8_t byte) { return byte ^ 42; });
  31   }
  32
  33   static Result<KeyType, nsresult> GenerateKey() { return KeyType{}; }
  34
  35   nsresult Init(CipherMode aCipherMode, Span<const uint8_t> aKey,
  36                 Span<const uint8_t> aInitialIv = Span<const uint8_t>{}) {
  37     return NS_OK;
  38   }
  39
  40   nsresult Cipher(Span<uint8_t> aIv, Span<const uint8_t> aIn,
  41                   Span<uint8_t> aOut) {
  42     DummyTransform(aIn, aOut);
  43     return NS_OK;
  44   }
  45
  46   static std::array<uint8_t, BlockPrefixLength> MakeBlockPrefix() {
  47     return {{42, 43, 44, 45}};
  48   }
  49
  50   static Span<const uint8_t> SerializeKey(const KeyType&) { return {}; }
  51
  52   static Maybe<KeyType> DeserializeKey(const Span<const uint8_t>&) {
  53     return Some(KeyType{});
  54   }
  55 };
  56 }  // namespace mozilla::dom::quota
  57
  58 #endif