1 files changed, 57 insertions, 0 deletions
diff --git a/dom/quota/NSSCipherStrategy.h b/dom/quota/NSSCipherStrategy.h
new file mode 100644
index 0000000000..d155b6119b
--- /dev/null
+++ b/dom/quota/NSSCipherStrategy.h
@@ -0,0 +1,57 @@
+/* -*- 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 "CipherStrategy.h"
+
+#include <cstddef>
+#include <cstdint>
+#include "mozilla/InitializedOnce.h"
+#include "mozilla/Result.h"
+#include "mozilla/Span.h"
+#include "ErrorList.h"
+#include "nsTArray.h"
+
+#include "ScopedNSSTypes.h"
+
+#include <array>
+
+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