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Add chainstate obfuscation to avoid spurious antivirus detection

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Adds an `obfuscate` parameter to `CLevelDBWrapper` and makes use of it
for all new chainstate stores built via `CCoinsViewDB`. Also adds an
`Xor` method to `CDataStream`.

Thanks to @sipa @laanwj @pstratem @dexX7 @KyrosKrane @gmaxwell.
This commit is contained in:
James O'Beirne
2015-09-07 15:22:23 -07:00
parent 3932ff50c5
commit 42cb388167
7 changed files with 338 additions and 22 deletions
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27
src/txdb.cpp
View File

@@ -29,18 +29,8 @@ static const char DB_REINDEX_FLAG = 'R';
static const char DB_LAST_BLOCK = 'l';
void static BatchWriteCoins(CLevelDBBatch &batch, const uint256 &hash, const CCoins &coins) {
if (coins.IsPruned())
batch.Erase(make_pair(DB_COINS, hash));
else
batch.Write(make_pair(DB_COINS, hash), coins);
}
void static BatchWriteHashBestChain(CLevelDBBatch &batch, const uint256 &hash) {
batch.Write(DB_BEST_BLOCK, hash);
}
CCoinsViewDB::CCoinsViewDB(size_t nCacheSize, bool fMemory, bool fWipe) : db(GetDataDir() / "chainstate", nCacheSize, fMemory, fWipe) {
CCoinsViewDB::CCoinsViewDB(size_t nCacheSize, bool fMemory, bool fWipe) : db(GetDataDir() / "chainstate", nCacheSize, fMemory, fWipe, true)
{
}
bool CCoinsViewDB::GetCoins(const uint256 &txid, CCoins &coins) const {
@@ -59,12 +49,15 @@ uint256 CCoinsViewDB::GetBestBlock() const {
}
bool CCoinsViewDB::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) {
CLevelDBBatch batch;
CLevelDBBatch batch(db.GetObfuscateKey());
size_t count = 0;
size_t changed = 0;
for (CCoinsMap::iterator it = mapCoins.begin(); it != mapCoins.end();) {
if (it->second.flags & CCoinsCacheEntry::DIRTY) {
BatchWriteCoins(batch, it->first, it->second.coins);
if (it->second.coins.IsPruned())
batch.Erase(make_pair(DB_COINS, it->first));
else
batch.Write(make_pair(DB_COINS, it->first), it->second.coins);
changed++;
}
count++;
@@ -72,7 +65,7 @@ bool CCoinsViewDB::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) {
mapCoins.erase(itOld);
}
if (!hashBlock.IsNull())
BatchWriteHashBestChain(batch, hashBlock);
batch.Write(DB_BEST_BLOCK, hashBlock);
LogPrint("coindb", "Committing %u changed transactions (out of %u) to coin database...\n", (unsigned int)changed, (unsigned int)count);
return db.WriteBatch(batch);
@@ -158,7 +151,7 @@ bool CCoinsViewDB::GetStats(CCoinsStats &stats) const {
}
bool CBlockTreeDB::WriteBatchSync(const std::vector<std::pair<int, const CBlockFileInfo*> >& fileInfo, int nLastFile, const std::vector<const CBlockIndex*>& blockinfo) {
CLevelDBBatch batch;
CLevelDBBatch batch(GetObfuscateKey());
for (std::vector<std::pair<int, const CBlockFileInfo*> >::const_iterator it=fileInfo.begin(); it != fileInfo.end(); it++) {
batch.Write(make_pair(DB_BLOCK_FILES, it->first), *it->second);
}
@@ -174,7 +167,7 @@ bool CBlockTreeDB::ReadTxIndex(const uint256 &txid, CDiskTxPos &pos) {
}
bool CBlockTreeDB::WriteTxIndex(const std::vector<std::pair<uint256, CDiskTxPos> >&vect) {
CLevelDBBatch batch;
CLevelDBBatch batch(GetObfuscateKey());
for (std::vector<std::pair<uint256,CDiskTxPos> >::const_iterator it=vect.begin(); it!=vect.end(); it++)
batch.Write(make_pair(DB_TXINDEX, it->first), it->second);
return WriteBatch(batch);