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-rw-r--r--src/wallet/wallet2.cpp230
1 files changed, 230 insertions, 0 deletions
diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index 90a36e032..2c8513fa4 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -6209,6 +6209,236 @@ bool wallet2::get_tx_key(const crypto::hash &txid, crypto::secret_key &tx_key, s
additional_tx_keys = j->second;
return true;
}
+//----------------------------------------------------------------------------------------------------
+std::string wallet2::get_spend_proof(const crypto::hash &txid, const std::string &message)
+{
+ THROW_WALLET_EXCEPTION_IF(m_watch_only, error::wallet_internal_error,
+ "get_spend_proof requires spend secret key and is not available for a watch-only wallet");
+
+ // fetch tx from daemon
+ COMMAND_RPC_GET_TRANSACTIONS::request req = AUTO_VAL_INIT(req);
+ req.txs_hashes.push_back(epee::string_tools::pod_to_hex(txid));
+ req.decode_as_json = false;
+ COMMAND_RPC_GET_TRANSACTIONS::response res = AUTO_VAL_INIT(res);
+ bool r;
+ {
+ const boost::lock_guard<boost::mutex> lock{m_daemon_rpc_mutex};
+ r = epee::net_utils::invoke_http_json("/gettransactions", req, res, m_http_client, rpc_timeout);
+ }
+ THROW_WALLET_EXCEPTION_IF(!r, error::no_connection_to_daemon, "gettransactions");
+ THROW_WALLET_EXCEPTION_IF(res.status == CORE_RPC_STATUS_BUSY, error::daemon_busy, "gettransactions");
+ THROW_WALLET_EXCEPTION_IF(res.status != CORE_RPC_STATUS_OK, error::wallet_internal_error, "gettransactions");
+ THROW_WALLET_EXCEPTION_IF(res.txs.size() != 1, error::wallet_internal_error,
+ "daemon returned wrong response for gettransactions, wrong txs count = " +
+ std::to_string(res.txs.size()) + ", expected 1");
+ cryptonote::blobdata bd;
+ THROW_WALLET_EXCEPTION_IF(!epee::string_tools::parse_hexstr_to_binbuff(res.txs[0].as_hex, bd), error::wallet_internal_error, "failed to parse tx from hexstr");
+ cryptonote::transaction tx;
+ crypto::hash tx_hash, tx_prefix_hash;
+ THROW_WALLET_EXCEPTION_IF(!cryptonote::parse_and_validate_tx_from_blob(bd, tx, tx_hash, tx_prefix_hash), error::wallet_internal_error, "failed to parse tx from blob");
+ THROW_WALLET_EXCEPTION_IF(tx_hash != txid, error::wallet_internal_error, "txid mismatch");
+
+ std::vector<std::vector<crypto::signature>> signatures;
+
+ // get signature prefix hash
+ std::string sig_prefix_data((const char*)&txid, sizeof(crypto::hash));
+ sig_prefix_data += message;
+ crypto::hash sig_prefix_hash;
+ crypto::cn_fast_hash(sig_prefix_data.data(), sig_prefix_data.size(), sig_prefix_hash);
+
+ for(size_t i = 0; i < tx.vin.size(); ++i)
+ {
+ const txin_to_key* const in_key = boost::get<txin_to_key>(std::addressof(tx.vin[i]));
+ if (in_key == nullptr)
+ continue;
+
+ // check if the key image belongs to us
+ const auto found = m_key_images.find(in_key->k_image);
+ if(found == m_key_images.end())
+ {
+ THROW_WALLET_EXCEPTION_IF(i > 0, error::wallet_internal_error, "subset of key images belong to us, very weird!");
+ THROW_WALLET_EXCEPTION_IF(true, error::wallet_internal_error, "This tx wasn't generated by this wallet!");
+ }
+
+ // derive the real output keypair
+ const transfer_details& in_td = m_transfers[found->second];
+ const txout_to_key* const in_tx_out_pkey = boost::get<txout_to_key>(std::addressof(in_td.m_tx.vout[in_td.m_internal_output_index].target));
+ THROW_WALLET_EXCEPTION_IF(in_tx_out_pkey == nullptr, error::wallet_internal_error, "Output is not txout_to_key");
+ const crypto::public_key in_tx_pub_key = get_tx_pub_key_from_extra(in_td.m_tx, in_td.m_pk_index);
+ const std::vector<crypto::public_key> in_additionakl_tx_pub_keys = get_additional_tx_pub_keys_from_extra(in_td.m_tx);
+ keypair in_ephemeral;
+ crypto::key_image in_img;
+ THROW_WALLET_EXCEPTION_IF(!generate_key_image_helper(m_account.get_keys(), m_subaddresses, in_tx_out_pkey->key, in_tx_pub_key, in_additionakl_tx_pub_keys, in_td.m_internal_output_index, in_ephemeral, in_img),
+ error::wallet_internal_error, "failed to generate key image");
+ THROW_WALLET_EXCEPTION_IF(in_key->k_image != in_img, error::wallet_internal_error, "key image mismatch");
+
+ // get output pubkeys in the ring
+ const std::vector<uint64_t> absolute_offsets = cryptonote::relative_output_offsets_to_absolute(in_key->key_offsets);
+ const size_t ring_size = in_key->key_offsets.size();
+ THROW_WALLET_EXCEPTION_IF(absolute_offsets.size() != ring_size, error::wallet_internal_error, "absolute offsets size is wrong");
+ COMMAND_RPC_GET_OUTPUTS_BIN::request req = AUTO_VAL_INIT(req);
+ req.outputs.resize(ring_size);
+ for (size_t j = 0; j < ring_size; ++j)
+ {
+ req.outputs[j].amount = in_key->amount;
+ req.outputs[j].index = absolute_offsets[j];
+ }
+ COMMAND_RPC_GET_OUTPUTS_BIN::response res = AUTO_VAL_INIT(res);
+ bool r;
+ {
+ const boost::lock_guard<boost::mutex> lock{m_daemon_rpc_mutex};
+ r = epee::net_utils::invoke_http_bin("/get_outs.bin", req, res, m_http_client, rpc_timeout);
+ }
+ THROW_WALLET_EXCEPTION_IF(!r, error::no_connection_to_daemon, "get_outs.bin");
+ THROW_WALLET_EXCEPTION_IF(res.status == CORE_RPC_STATUS_BUSY, error::daemon_busy, "get_outs.bin");
+ THROW_WALLET_EXCEPTION_IF(res.status != CORE_RPC_STATUS_OK, error::wallet_internal_error, "get_outs.bin");
+ THROW_WALLET_EXCEPTION_IF(res.outs.size() != ring_size, error::wallet_internal_error,
+ "daemon returned wrong response for get_outs.bin, wrong amounts count = " +
+ std::to_string(res.outs.size()) + ", expected " + std::to_string(ring_size));
+
+ // copy pubkey pointers
+ std::vector<const crypto::public_key *> p_output_keys;
+ for (const COMMAND_RPC_GET_OUTPUTS_BIN::outkey &out : res.outs)
+ p_output_keys.push_back(&out.key);
+
+ // figure out real output index and secret key
+ size_t sec_index = -1;
+ for (size_t j = 0; j < ring_size; ++j)
+ {
+ if (res.outs[j].key == in_ephemeral.pub)
+ {
+ sec_index = j;
+ break;
+ }
+ }
+ THROW_WALLET_EXCEPTION_IF(sec_index >= ring_size, error::wallet_internal_error, "secret index not found");
+
+ // generate ring sig for this input
+ signatures.push_back(std::vector<crypto::signature>());
+ std::vector<crypto::signature>& sigs = signatures.back();
+ sigs.resize(in_key->key_offsets.size());
+ crypto::generate_ring_signature(sig_prefix_hash, in_key->k_image, p_output_keys, in_ephemeral.sec, sec_index, sigs.data());
+ }
+
+ std::string sig_str = "SpendProofV1";
+ for (const std::vector<crypto::signature>& ring_sig : signatures)
+ for (const crypto::signature& sig : ring_sig)
+ sig_str += tools::base58::encode(std::string((const char *)&sig, sizeof(crypto::signature)));
+ return sig_str;
+}
+//----------------------------------------------------------------------------------------------------
+bool wallet2::check_spend_proof(const crypto::hash &txid, const std::string &message, const std::string &sig_str)
+{
+ const std::string header = "SpendProofV1";
+ const size_t header_len = header.size();
+ THROW_WALLET_EXCEPTION_IF(sig_str.size() < header_len || sig_str.substr(0, header_len) != header, error::wallet_internal_error,
+ "Signature header check error");
+
+ // fetch tx from daemon
+ COMMAND_RPC_GET_TRANSACTIONS::request req = AUTO_VAL_INIT(req);
+ req.txs_hashes.push_back(epee::string_tools::pod_to_hex(txid));
+ req.decode_as_json = false;
+ COMMAND_RPC_GET_TRANSACTIONS::response res = AUTO_VAL_INIT(res);
+ bool r;
+ {
+ const boost::lock_guard<boost::mutex> lock{m_daemon_rpc_mutex};
+ r = epee::net_utils::invoke_http_json("/gettransactions", req, res, m_http_client, rpc_timeout);
+ }
+ THROW_WALLET_EXCEPTION_IF(!r, error::no_connection_to_daemon, "gettransactions");
+ THROW_WALLET_EXCEPTION_IF(res.status == CORE_RPC_STATUS_BUSY, error::daemon_busy, "gettransactions");
+ THROW_WALLET_EXCEPTION_IF(res.status != CORE_RPC_STATUS_OK, error::wallet_internal_error, "gettransactions");
+ THROW_WALLET_EXCEPTION_IF(res.txs.size() != 1, error::wallet_internal_error,
+ "daemon returned wrong response for gettransactions, wrong txs count = " +
+ std::to_string(res.txs.size()) + ", expected 1");
+ cryptonote::blobdata bd;
+ THROW_WALLET_EXCEPTION_IF(!epee::string_tools::parse_hexstr_to_binbuff(res.txs[0].as_hex, bd), error::wallet_internal_error, "failed to parse tx from hexstr");
+ cryptonote::transaction tx;
+ crypto::hash tx_hash, tx_prefix_hash;
+ THROW_WALLET_EXCEPTION_IF(!cryptonote::parse_and_validate_tx_from_blob(bd, tx, tx_hash, tx_prefix_hash), error::wallet_internal_error, "failed to parse tx from blob");
+ THROW_WALLET_EXCEPTION_IF(tx_hash != txid, error::wallet_internal_error, "txid mismatch");
+
+ // check signature size
+ size_t num_sigs = 0;
+ for(size_t i = 0; i < tx.vin.size(); ++i)
+ {
+ const txin_to_key* const in_key = boost::get<txin_to_key>(std::addressof(tx.vin[i]));
+ if (in_key != nullptr)
+ num_sigs += in_key->key_offsets.size();
+ }
+ std::vector<std::vector<crypto::signature>> signatures = { std::vector<crypto::signature>(1) };
+ const size_t sig_len = tools::base58::encode(std::string((const char *)&signatures[0][0], sizeof(crypto::signature))).size();
+ THROW_WALLET_EXCEPTION_IF(sig_str.size() != header_len + num_sigs * sig_len,
+ error::wallet_internal_error, "incorrect signature size");
+
+ // decode base58
+ signatures.clear();
+ size_t offset = header_len;
+ for(size_t i = 0; i < tx.vin.size(); ++i)
+ {
+ const txin_to_key* const in_key = boost::get<txin_to_key>(std::addressof(tx.vin[i]));
+ if (in_key == nullptr)
+ continue;
+ signatures.resize(signatures.size() + 1);
+ signatures.back().resize(in_key->key_offsets.size());
+ for (size_t j = 0; j < in_key->key_offsets.size(); ++j)
+ {
+ std::string sig_decoded;
+ THROW_WALLET_EXCEPTION_IF(!tools::base58::decode(sig_str.substr(offset, sig_len), sig_decoded), error::wallet_internal_error, "Signature decoding error");
+ THROW_WALLET_EXCEPTION_IF(sizeof(crypto::signature) != sig_decoded.size(), error::wallet_internal_error, "Signature decoding error");
+ memcpy(&signatures.back()[j], sig_decoded.data(), sizeof(crypto::signature));
+ offset += sig_len;
+ }
+ }
+
+ // get signature prefix hash
+ std::string sig_prefix_data((const char*)&txid, sizeof(crypto::hash));
+ sig_prefix_data += message;
+ crypto::hash sig_prefix_hash;
+ crypto::cn_fast_hash(sig_prefix_data.data(), sig_prefix_data.size(), sig_prefix_hash);
+
+ std::vector<std::vector<crypto::signature>>::const_iterator sig_iter = signatures.cbegin();
+ for(size_t i = 0; i < tx.vin.size(); ++i)
+ {
+ const txin_to_key* const in_key = boost::get<txin_to_key>(std::addressof(tx.vin[i]));
+ if (in_key == nullptr)
+ continue;
+
+ // get output pubkeys in the ring
+ COMMAND_RPC_GET_OUTPUTS_BIN::request req = AUTO_VAL_INIT(req);
+ const std::vector<uint64_t> absolute_offsets = cryptonote::relative_output_offsets_to_absolute(in_key->key_offsets);
+ req.outputs.resize(absolute_offsets.size());
+ for (size_t j = 0; j < absolute_offsets.size(); ++j)
+ {
+ req.outputs[j].amount = in_key->amount;
+ req.outputs[j].index = absolute_offsets[j];
+ }
+ COMMAND_RPC_GET_OUTPUTS_BIN::response res = AUTO_VAL_INIT(res);
+ bool r;
+ {
+ const boost::lock_guard<boost::mutex> lock{m_daemon_rpc_mutex};
+ r = epee::net_utils::invoke_http_bin("/get_outs.bin", req, res, m_http_client, rpc_timeout);
+ }
+ THROW_WALLET_EXCEPTION_IF(!r, error::no_connection_to_daemon, "get_outs.bin");
+ THROW_WALLET_EXCEPTION_IF(res.status == CORE_RPC_STATUS_BUSY, error::daemon_busy, "get_outs.bin");
+ THROW_WALLET_EXCEPTION_IF(res.status != CORE_RPC_STATUS_OK, error::wallet_internal_error, "get_outs.bin");
+ THROW_WALLET_EXCEPTION_IF(res.outs.size() != req.outputs.size(), error::wallet_internal_error,
+ "daemon returned wrong response for get_outs.bin, wrong amounts count = " +
+ std::to_string(res.outs.size()) + ", expected " + std::to_string(req.outputs.size()));
+
+ // copy pointers
+ std::vector<const crypto::public_key *> p_output_keys;
+ for (const COMMAND_RPC_GET_OUTPUTS_BIN::outkey &out : res.outs)
+ p_output_keys.push_back(&out.key);
+
+ // check this ring
+ if (!crypto::check_ring_signature(sig_prefix_hash, in_key->k_image, p_output_keys, sig_iter->data()))
+ return false;
+ ++sig_iter;
+ }
+ THROW_WALLET_EXCEPTION_IF(sig_iter != signatures.cend(), error::wallet_internal_error, "Signature iterator didn't reach the end");
+ return true;
+}
+//----------------------------------------------------------------------------------------------------
void wallet2::check_tx_key(const crypto::hash &txid, const crypto::secret_key &tx_key, const std::vector<crypto::secret_key> &additional_tx_keys, const cryptonote::account_public_address &address, uint64_t &received, bool &in_pool, uint64_t &confirmations)
{
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