forked from mirrors/gecko-dev
8462db41d1
Disk corruption can lead to the stored length of a value to be unreasonably large and trigger an OOM. Since values are all currently <= 32 bytes, we can safely enforce a 256-byte upper bound. MozReview-Commit-ID: XygReOpEK3 --HG-- extra : rebase_source : cd2bc880d43612b04d43fb4132bba32bdc3d0f3e
70 lines
2.2 KiB
C++
70 lines
2.2 KiB
C++
//* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef LookupCacheV4_h__
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#define LookupCacheV4_h__
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#include "LookupCache.h"
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namespace mozilla {
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namespace safebrowsing {
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// Forward declaration.
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class TableUpdateV4;
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class LookupCacheV4 final : public LookupCache
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{
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public:
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explicit LookupCacheV4(const nsACString& aTableName,
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const nsACString& aProvider,
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nsIFile* aStoreFile)
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: LookupCache(aTableName, aProvider, aStoreFile) {}
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~LookupCacheV4() {}
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virtual nsresult Init() override;
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virtual nsresult Has(const Completion& aCompletion,
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bool* aHas,
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uint32_t* aMatchLength,
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bool* aConfirmed) override;
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virtual bool IsEmpty() override;
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nsresult Build(PrefixStringMap& aPrefixMap);
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nsresult GetPrefixes(PrefixStringMap& aPrefixMap);
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nsresult GetFixedLengthPrefixes(FallibleTArray<uint32_t>& aPrefixes);
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// ApplyUpdate will merge data stored in aTableUpdate with prefixes in aInputMap.
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nsresult ApplyUpdate(TableUpdateV4* aTableUpdate,
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PrefixStringMap& aInputMap,
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PrefixStringMap& aOutputMap);
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nsresult AddFullHashResponseToCache(const FullHashResponseMap& aResponseMap);
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nsresult WriteMetadata(TableUpdateV4* aTableUpdate);
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nsresult LoadMetadata(nsACString& aState, nsACString& aChecksum);
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static const int VER;
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static const uint32_t MAX_METADATA_VALUE_LENGTH;
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protected:
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virtual nsresult ClearPrefixes() override;
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virtual nsresult StoreToFile(nsIFile* aFile) override;
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virtual nsresult LoadFromFile(nsIFile* aFile) override;
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virtual size_t SizeOfPrefixSet() override;
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private:
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virtual int Ver() const override { return VER; }
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nsresult InitCrypto(nsCOMPtr<nsICryptoHash>& aCrypto);
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nsresult VerifyChecksum(const nsACString& aChecksum);
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RefPtr<VariableLengthPrefixSet> mVLPrefixSet;
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};
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} // namespace safebrowsing
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} // namespace mozilla
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#endif
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