Protect node privacy by proper filtering in restricted-mode RPC answers

This patch allows to filter out sensitive information for queries that rely on the pool state, when running in restricted mode.
This filtering is only applied to data sent back to RPC queries. Results of inline commands typed locally in the daemon are not affected.
In practice, when running with `--restricted-rpc`:
* get_transaction_pool will list relayed transactions with the fields "last relayed time" and "received time" set to zero.
* get_transaction_pool will not list transaction that have do_not_relay set to true, and will not list key images that are used only for such transactions
* get_transaction_pool_hashes.bin will not list such transaction
* get_transaction_pool_stats will not count such transactions in any of the aggregated values that are computed

The implementation does not make filtering the default, so developers should be mindful of this if they add new RPC functionality.
Fixes #2590.
This commit is contained in:
binaryFate
2017-11-08 13:06:41 +01:00
parent a2c2f4e4b0
commit 10013e9434
13 changed files with 140 additions and 75 deletions

View File

@@ -564,7 +564,7 @@ namespace cryptonote
return true;
}
//------------------------------------------------------------------------------------------------------------------------------
bool core_rpc_server::on_is_key_image_spent(const COMMAND_RPC_IS_KEY_IMAGE_SPENT::request& req, COMMAND_RPC_IS_KEY_IMAGE_SPENT::response& res)
bool core_rpc_server::on_is_key_image_spent(const COMMAND_RPC_IS_KEY_IMAGE_SPENT::request& req, COMMAND_RPC_IS_KEY_IMAGE_SPENT::response& res, bool request_has_rpc_origin)
{
CHECK_CORE_BUSY();
std::vector<crypto::key_image> key_images;
@@ -596,7 +596,7 @@ namespace cryptonote
// check the pool too
std::vector<cryptonote::tx_info> txs;
std::vector<cryptonote::spent_key_image_info> ki;
r = m_core.get_pool_transactions_and_spent_keys_info(txs, ki);
r = m_core.get_pool_transactions_and_spent_keys_info(txs, ki, !request_has_rpc_origin || !m_restricted);
if(!r)
{
res.status = "Failed";
@@ -843,26 +843,26 @@ namespace cryptonote
return true;
}
//------------------------------------------------------------------------------------------------------------------------------
bool core_rpc_server::on_get_transaction_pool(const COMMAND_RPC_GET_TRANSACTION_POOL::request& req, COMMAND_RPC_GET_TRANSACTION_POOL::response& res)
bool core_rpc_server::on_get_transaction_pool(const COMMAND_RPC_GET_TRANSACTION_POOL::request& req, COMMAND_RPC_GET_TRANSACTION_POOL::response& res, bool request_has_rpc_origin)
{
CHECK_CORE_BUSY();
m_core.get_pool_transactions_and_spent_keys_info(res.transactions, res.spent_key_images);
m_core.get_pool_transactions_and_spent_keys_info(res.transactions, res.spent_key_images, !request_has_rpc_origin || !m_restricted);
res.status = CORE_RPC_STATUS_OK;
return true;
}
//------------------------------------------------------------------------------------------------------------------------------
bool core_rpc_server::on_get_transaction_pool_hashes(const COMMAND_RPC_GET_TRANSACTION_POOL_HASHES::request& req, COMMAND_RPC_GET_TRANSACTION_POOL_HASHES::response& res)
bool core_rpc_server::on_get_transaction_pool_hashes(const COMMAND_RPC_GET_TRANSACTION_POOL_HASHES::request& req, COMMAND_RPC_GET_TRANSACTION_POOL_HASHES::response& res, bool request_has_rpc_origin)
{
CHECK_CORE_BUSY();
m_core.get_pool_transaction_hashes(res.tx_hashes);
m_core.get_pool_transaction_hashes(res.tx_hashes, !request_has_rpc_origin || !m_restricted);
res.status = CORE_RPC_STATUS_OK;
return true;
}
//------------------------------------------------------------------------------------------------------------------------------
bool core_rpc_server::on_get_transaction_pool_stats(const COMMAND_RPC_GET_TRANSACTION_POOL_STATS::request& req, COMMAND_RPC_GET_TRANSACTION_POOL_STATS::response& res)
bool core_rpc_server::on_get_transaction_pool_stats(const COMMAND_RPC_GET_TRANSACTION_POOL_STATS::request& req, COMMAND_RPC_GET_TRANSACTION_POOL_STATS::response& res, bool request_has_rpc_origin)
{
CHECK_CORE_BUSY();
m_core.get_pool_transaction_stats(res.pool_stats);
m_core.get_pool_transaction_stats(res.pool_stats, !request_has_rpc_origin || !m_restricted);
res.status = CORE_RPC_STATUS_OK;
return true;
}
@@ -1825,7 +1825,7 @@ namespace cryptonote
const command_line::arg_descriptor<bool> core_rpc_server::arg_restricted_rpc = {
"restricted-rpc"
, "Restrict RPC to view only commands"
, "Restrict RPC to view only commands and do not return privacy sensitive data in RPC calls"
, false
};
} // namespace cryptonote