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blockfilter: Omit empty scripts from filter contents.

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Code change also avoids out-of-bounds script access bug.
This commit is contained in:
Jim Posen 2018-08-26 11:25:36 -07:00
parent 427253cf7e
commit f05599557a
3 changed files with 9 additions and 4 deletions
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3
src/blockfilter.cpp
View file

@ -208,7 +208,7 @@ static GCSFilter::ElementSet BasicFilterElements(const CBlock& block,
for (const CTransactionRef& tx : block.vtx) { for (const CTransactionRef& tx : block.vtx) {
for (const CTxOut& txout : tx->vout) { for (const CTxOut& txout : tx->vout) {
const CScript& script = txout.scriptPubKey; const CScript& script = txout.scriptPubKey;
if (script[0] == OP_RETURN) continue; if (script.empty() || script[0] == OP_RETURN) continue;
elements.emplace(script.begin(), script.end()); elements.emplace(script.begin(), script.end());
} }
} }
@ -216,6 +216,7 @@ static GCSFilter::ElementSet BasicFilterElements(const CBlock& block,
for (const CTxUndo& tx_undo : block_undo.vtxundo) { for (const CTxUndo& tx_undo : block_undo.vtxundo) {
for (const Coin& prevout : tx_undo.vprevout) { for (const Coin& prevout : tx_undo.vprevout) {
const CScript& script = prevout.out.scriptPubKey; const CScript& script = prevout.out.scriptPubKey;
if (script.empty()) continue;
elements.emplace(script.begin(), script.end()); elements.emplace(script.begin(), script.end());
} }
} }

8
src/test/blockfilter_tests.cpp
View file

@ -41,7 +41,7 @@ BOOST_AUTO_TEST_CASE(gcsfilter_test)
BOOST_AUTO_TEST_CASE(blockfilter_basic_test) BOOST_AUTO_TEST_CASE(blockfilter_basic_test)
{ {
CScript included_scripts[5], excluded_scripts[2]; CScript included_scripts[5], excluded_scripts[3];
// First two are outputs on a single transaction. // First two are outputs on a single transaction.
included_scripts[0] << std::vector<unsigned char>(0, 65) << OP_CHECKSIG; included_scripts[0] << std::vector<unsigned char>(0, 65) << OP_CHECKSIG;
@ -67,6 +67,7 @@ BOOST_AUTO_TEST_CASE(blockfilter_basic_test)
CMutableTransaction tx_2; CMutableTransaction tx_2;
tx_2.vout.emplace_back(300, included_scripts[2]); tx_2.vout.emplace_back(300, included_scripts[2]);
tx_2.vout.emplace_back(0, excluded_scripts[0]); tx_2.vout.emplace_back(0, excluded_scripts[0]);
tx_2.vout.emplace_back(400, excluded_scripts[2]); // Script is empty
CBlock block; CBlock block;
block.vtx.push_back(MakeTransactionRef(tx_1)); block.vtx.push_back(MakeTransactionRef(tx_1));
@ -74,8 +75,9 @@ BOOST_AUTO_TEST_CASE(blockfilter_basic_test)
CBlockUndo block_undo; CBlockUndo block_undo;
block_undo.vtxundo.emplace_back(); block_undo.vtxundo.emplace_back();
block_undo.vtxundo.back().vprevout.emplace_back(CTxOut(400, included_scripts[3]), 1000, true); block_undo.vtxundo.back().vprevout.emplace_back(CTxOut(500, included_scripts[3]), 1000, true);
block_undo.vtxundo.back().vprevout.emplace_back(CTxOut(500, included_scripts[4]), 10000, false); block_undo.vtxundo.back().vprevout.emplace_back(CTxOut(600, included_scripts[4]), 10000, false);
block_undo.vtxundo.back().vprevout.emplace_back(CTxOut(700, excluded_scripts[2]), 100000, false);
BlockFilter block_filter(BlockFilterType::BASIC, block, block_undo); BlockFilter block_filter(BlockFilterType::BASIC, block, block_undo);
const GCSFilter& filter = block_filter.GetFilter(); const GCSFilter& filter = block_filter.GetFilter();

2
src/test/data/blockfilters.json
View file

@ -3,6 +3,8 @@
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