1 files changed, 42 insertions, 0 deletions
diff --git a/dom/quota/CipherStrategy.h b/dom/quota/CipherStrategy.h
new file mode 100644
index 0000000000..495bdb7528
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+++ b/dom/quota/CipherStrategy.h
@@ -0,0 +1,42 @@
+/* -*- 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_CipherStrategy_h
+#define mozilla_dom_quota_CipherStrategy_h
+
+namespace mozilla::dom::quota {
+
+enum class CipherMode { Encrypt, Decrypt };
+
+// An implementation of the CipherStrategy concept must provide the following
+// data members:
+//
+//   static constexpr size_t BlockPrefixLength;
+//   static constexpr size_t BasicBlockSize;
+//
+// It must provide the following member types:
+//
+//   KeyType
+//   BlockPrefixType, which must be an InputRange of type uint8_t and a
+//                    SizedRange of size BlockPrefixLength
+//
+// It must provide the following member functions with compatible signatures:
+//
+//   static Result<KeyType, nsresult> GenerateKey();
+//
+//   nsresult Cipher(const CipherMode aMode, const KeyType& aKey,
+//                   Span<uint8_t> aIv, Span<const uint8_t> aIn,
+//                   Span<uint8_t> aOut);
+//
+//   BlockPrefixType MakeBlockPrefix();
+//
+//   Span<const uint8_t> SerializeKey(const KeyType& aKey);
+//
+//   KeyType DeserializeKey(const Span<const uint8_t>& aSerializedKey);
+
+}  // namespace mozilla::dom::quota
+
+#endif