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cryptonote_basic: serialization checks

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This commit is contained in:
j-berman
2026-09-09 18:20:50 -07:00
parent 3d3920d748
commit f8e2a8709d
14 changed files with 136 additions and 66 deletions
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src/cryptonote_basic/cryptonote_format_utils.cpp
+1 -26
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@@ -96,27 +96,6 @@ namespace cryptonote
return bp_clawback;
}
std::size_t max_total_key_offsets()
{
// This is a 100% guaranteed ceiling for the entire chain
return get_max_tx_size() / sizeof(crypto::public_key);
}
bool n_key_offsets_exceeds_max(const transaction_prefix& tx)
{
const std::size_t max_allowed = max_total_key_offsets();
std::size_t total_key_offsets = 0;
for (const auto &vin : tx.vin)
{
if (vin.type() != typeid(cryptonote::txin_to_key))
continue;
const std::size_t n_key_offsets = boost::get<cryptonote::txin_to_key>(vin).key_offsets.size();
CHECK_AND_ASSERT_MES((n_key_offsets + total_key_offsets) >= total_key_offsets, true, "key offsets overflow");
total_key_offsets += n_key_offsets;
}
return total_key_offsets >= max_allowed;
}
bool passes_max_size_check(const bool max_size_check, const blobdata_ref &tx_blob)
{
if (!max_size_check)
@@ -144,7 +123,7 @@ namespace cryptonote
bool expand_transaction_1(transaction &tx, bool base_only)
{
if (tx.version >= 2 && !is_coinbase(tx))
if (tx.version >= 2 && !tx.is_coinbase())
{
rct::rctSig &rv = tx.rct_signatures;
if (rv.type == rct::RCTTypeNull)
@@ -228,7 +207,6 @@ namespace cryptonote
binary_archive<false> ba{epee::strspan<std::uint8_t>(tx_blob)};
bool r = ::serialization::serialize(ba, tx);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse transaction from blob");
CHECK_AND_ASSERT_MES(!n_key_offsets_exceeds_max(tx), false, "Transaction contains too many ring members");
CHECK_AND_ASSERT_MES(expand_transaction_1(tx, false), false, "Failed to expand transaction data");
tx.invalidate_hashes();
tx.set_blob_size(tx_blob.size());
@@ -241,7 +219,6 @@ namespace cryptonote
binary_archive<false> ba{epee::strspan<std::uint8_t>(tx_blob)};
bool r = tx.serialize_base(ba);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse transaction from blob");
CHECK_AND_ASSERT_MES(!n_key_offsets_exceeds_max(tx), false, "Transaction contains too many ring members");
CHECK_AND_ASSERT_MES(expand_transaction_1(tx, true), false, "Failed to expand transaction data");
tx.invalidate_hashes();
return true;
@@ -253,7 +230,6 @@ namespace cryptonote
binary_archive<false> ba{epee::strspan<std::uint8_t>(tx_blob)};
bool r = ::serialization::serialize_noeof(ba, tx);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse transaction prefix from blob");
CHECK_AND_ASSERT_MES(!n_key_offsets_exceeds_max(tx), false, "Transaction contains too many ring members");
return true;
}
//---------------------------------------------------------------
@@ -263,7 +239,6 @@ namespace cryptonote
binary_archive<false> ba{epee::strspan<std::uint8_t>(tx_blob)};
bool r = ::serialization::serialize(ba, tx);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse transaction from blob");
CHECK_AND_ASSERT_MES(!n_key_offsets_exceeds_max(tx), false, "Transaction contains too many ring members");
CHECK_AND_ASSERT_MES(expand_transaction_1(tx, false), false, "Failed to expand transaction data");
tx.invalidate_hashes();
tx.set_blob_size(tx_blob.size());