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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_indexeddbcipherKeyManager_h
#define mozilla_dom_indexeddbcipherKeyManager_h
#include "mozilla/dom/quota/IPCStreamCipherStrategy.h"
#include "mozilla/DataMutex.h"
#include "nsTHashMap.h"
namespace mozilla::dom::indexedDB {
namespace {
using IndexedDBCipherStrategy = quota::IPCStreamCipherStrategy;
using CipherKey = IndexedDBCipherStrategy::KeyType;
class IndexedDBCipherKeyManager {
// This helper class is used by IndexedDB operations to store/retrieve cipher
// keys in private browsing mode. All data in IndexedDB must be encrypted
// using a cipher key and unique IV (Initialization Vector). While there's a
// separate cipher key for every blob file; any normal key/value pairs get
// encrypted using the commmon database key. All keys pertaining to a single
// database get stored together using the database id in a hashmap. We are
// using a 2-level hashmap here; keys get stored effectively at level 2.
// Looking up at level 1 using database id gives us access to hashmap of keys
// corresponding to that database which we could use to look up the common
// database key and blob keys using "default" and blob file ids respectively.
public:
using PrivateBrowsingInfoHashtable =
nsTHashMap<nsCStringHashKey, nsTHashMap<nsCStringHashKey, CipherKey>>;
IndexedDBCipherKeyManager()
: mPrivateBrowsingInfoHashTable("IndexedDBCipherKeyManager"){};
Maybe<CipherKey> Get(const nsCString& aDatabaseID,
const nsCString& keyStoreID = "default"_ns);
CipherKey Ensure(const nsCString& aDatabaseID,
const nsCString& keyStoreID = "default"_ns);
bool Remove(const nsCString& aDatabaseID);
private:
DataMutex<PrivateBrowsingInfoHashtable> mPrivateBrowsingInfoHashTable;
};
} // namespace
} // namespace mozilla::dom::indexedDB
#endif // IndexedDBCipherKeyManager_h
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