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120 lines
3.7 KiB
C++
120 lines
3.7 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 ProtocolParser_h__
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#define ProtocolParser_h__
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#include "HashStore.h"
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#include "nsICryptoHMAC.h"
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namespace mozilla {
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namespace safebrowsing {
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/**
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* Some helpers for parsing the safe
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*/
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class ProtocolParser {
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public:
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struct ForwardedUpdate {
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nsCString table;
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nsCString url;
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};
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ProtocolParser();
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~ProtocolParser();
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nsresult Status() const { return mUpdateStatus; }
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nsresult Init(nsICryptoHash* aHasher);
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void SetCurrentTable(const nsACString& aTable);
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nsresult Begin();
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nsresult AppendStream(const nsACString& aData);
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// Forget the table updates that were created by this pass. It
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// becomes the caller's responsibility to free them. This is shitty.
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TableUpdate *GetTableUpdate(const nsACString& aTable);
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void ForgetTableUpdates() { mTableUpdates.Clear(); }
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nsTArray<TableUpdate*> &GetTableUpdates() { return mTableUpdates; }
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// Update information.
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const nsTArray<ForwardedUpdate> &Forwards() const { return mForwards; }
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int32_t UpdateWait() { return mUpdateWait; }
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bool ResetRequested() { return mResetRequested; }
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private:
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nsresult ProcessControl(bool* aDone);
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nsresult ProcessExpirations(const nsCString& aLine);
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nsresult ProcessChunkControl(const nsCString& aLine);
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nsresult ProcessForward(const nsCString& aLine);
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nsresult AddForward(const nsACString& aUrl);
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nsresult ProcessChunk(bool* done);
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// Remove this, it's only used for testing
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nsresult ProcessPlaintextChunk(const nsACString& aChunk);
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nsresult ProcessShaChunk(const nsACString& aChunk);
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nsresult ProcessHostAdd(const Prefix& aDomain, uint8_t aNumEntries,
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const nsACString& aChunk, uint32_t* aStart);
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nsresult ProcessHostSub(const Prefix& aDomain, uint8_t aNumEntries,
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const nsACString& aChunk, uint32_t* aStart);
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nsresult ProcessHostAddComplete(uint8_t aNumEntries, const nsACString& aChunk,
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uint32_t *aStart);
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nsresult ProcessHostSubComplete(uint8_t numEntries, const nsACString& aChunk,
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uint32_t* start);
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// Digest chunks are very similar to shavar chunks, except digest chunks
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// always contain the full hash, so there is no need for chunk data to
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// contain prefix sizes.
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nsresult ProcessDigestChunk(const nsACString& aChunk);
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nsresult ProcessDigestAdd(const nsACString& aChunk);
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nsresult ProcessDigestSub(const nsACString& aChunk);
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bool NextLine(nsACString& aLine);
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void CleanupUpdates();
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enum ParserState {
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PROTOCOL_STATE_CONTROL,
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PROTOCOL_STATE_CHUNK
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};
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ParserState mState;
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enum ChunkType {
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// Types for shavar tables.
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CHUNK_ADD,
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CHUNK_SUB,
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// Types for digest256 tables. digest256 tables differ in format from
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// shavar tables since they only contain complete hashes.
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CHUNK_ADD_DIGEST,
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CHUNK_SUB_DIGEST
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};
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struct ChunkState {
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ChunkType type;
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uint32_t num;
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uint32_t hashSize;
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uint32_t length;
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void Clear() { num = 0; hashSize = 0; length = 0; }
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};
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ChunkState mChunkState;
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nsCOMPtr<nsICryptoHash> mCryptoHash;
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nsresult mUpdateStatus;
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nsCString mPending;
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uint32_t mUpdateWait;
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bool mResetRequested;
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nsTArray<ForwardedUpdate> mForwards;
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// Keep track of updates to apply before passing them to the DBServiceWorkers.
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nsTArray<TableUpdate*> mTableUpdates;
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// Updates to apply to the current table being parsed.
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TableUpdate *mTableUpdate;
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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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