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rct amount key modified as per luigi1111's recommendations

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This allows the key to be not the same for two outputs sent to
the same address (eg, if you pay yourself, and also get change
back). Also remove the key amounts lists and return parameters
since we don't actually generate random ones, so we don't need
to save them as we can recalculate them when needed if we have
the correct keys.
This commit is contained in:
moneromooo-monero 2016-08-10 12:48:20 +01:00
parent 93f5c625f0
commit d4b62a1e29
No known key found for this signature in database
GPG key ID: 686F07454D6CEFC3
15 changed files with 85 additions and 133 deletions
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39
src/wallet/wallet2.cpp
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@ -207,16 +207,25 @@ void wallet2::check_acc_out(const account_keys &acc, const tx_out &o, const cryp
error = false;
}
//----------------------------------------------------------------------------------------------------
static uint64_t decodeRct(const rct::rctSig & rv, const rct::key & sk, unsigned int i, rct::key & mask)
static uint64_t decodeRct(const rct::rctSig & rv, const crypto::public_key pub, const crypto::secret_key &sec, unsigned int i, rct::key & mask)
{
crypto::key_derivation derivation;
bool r = crypto::generate_key_derivation(pub, sec, derivation);
if (!r)
{
LOG_ERROR("Failed to generate key derivation to decode rct output " << i);
return 0;
}
crypto::secret_key scalar1;
crypto::derivation_to_scalar(derivation, i, scalar1);
try
{
switch (rv.type)
{
case rct::RCTTypeSimple:
return rct::decodeRctSimpleFromSharedSecret(rv, sk, i, mask);
return rct::decodeRctSimple(rv, rct::sk2rct(scalar1), i, mask);
case rct::RCTTypeFull:
return rct::decodeRctFromSharedSecret(rv, sk, i, mask);
return rct::decodeRct(rv, rct::sk2rct(scalar1), i, mask);
default:
LOG_ERROR("Unsupported rct type: " << rv.type);
return 0;
@ -308,8 +317,7 @@ void wallet2::process_new_transaction(const cryptonote::transaction& tx, const s
if (money_transfered == 0)
{
const cryptonote::account_keys& keys = m_account.get_keys();
rct::key amount_key = rct::hash_to_scalar(rct::scalarmultKey(rct::pk2rct(pub_key_field.pub_key), rct::sk2rct(keys.m_view_secret_key)));
money_transfered = tools::decodeRct(tx.rct_signatures, amount_key, 0, mask[0]);
money_transfered = tools::decodeRct(tx.rct_signatures, pub_key_field.pub_key, keys.m_view_secret_key, 0, mask[0]);
}
amount[0] = money_transfered;
tx_money_got_in_outs = money_transfered;
@ -352,8 +360,7 @@ void wallet2::process_new_transaction(const cryptonote::transaction& tx, const s
if (money_transfered[i] == 0)
{
const cryptonote::account_keys& keys = m_account.get_keys();
rct::key amount_key = rct::hash_to_scalar(rct::scalarmultKey(rct::pk2rct(pub_key_field.pub_key), rct::sk2rct(keys.m_view_secret_key)));
money_transfered[i] = tools::decodeRct(tx.rct_signatures, amount_key, i, mask[i]);
money_transfered[i] = tools::decodeRct(tx.rct_signatures, pub_key_field.pub_key, keys.m_view_secret_key, i, mask[i]);
}
tx_money_got_in_outs += money_transfered[i];
amount[i] = money_transfered[i];
@ -401,8 +408,7 @@ void wallet2::process_new_transaction(const cryptonote::transaction& tx, const s
if (money_transfered[i] == 0)
{
const cryptonote::account_keys& keys = m_account.get_keys();
rct::key amount_key = rct::hash_to_scalar(rct::scalarmultKey(rct::pk2rct(pub_key_field.pub_key), rct::sk2rct(keys.m_view_secret_key)));
money_transfered[i] = tools::decodeRct(tx.rct_signatures, amount_key, i, mask[i]);
money_transfered[i] = tools::decodeRct(tx.rct_signatures, pub_key_field.pub_key, keys.m_view_secret_key, i, mask[i]);
}
tx_money_got_in_outs += money_transfered[i];
amount[i] = money_transfered[i];
@ -434,8 +440,7 @@ void wallet2::process_new_transaction(const cryptonote::transaction& tx, const s
if (money_transfered == 0)
{
const cryptonote::account_keys& keys = m_account.get_keys();
rct::key amount_key = rct::hash_to_scalar(rct::scalarmultKey(rct::pk2rct(pub_key_field.pub_key), rct::sk2rct(keys.m_view_secret_key)));
money_transfered = tools::decodeRct(tx.rct_signatures, amount_key, i, mask[i]);
money_transfered = tools::decodeRct(tx.rct_signatures, pub_key_field.pub_key, keys.m_view_secret_key, i, mask[i]);
}
amount[i] = money_transfered;
tx_money_got_in_outs += money_transfered;
@ -2896,8 +2901,7 @@ void wallet2::transfer_selected(const std::vector<cryptonote::tx_destination_ent
}
crypto::secret_key tx_key;
std::vector<crypto::secret_key> amount_keys;
bool r = cryptonote::construct_tx_and_get_tx_keys(m_account.get_keys(), sources, splitted_dsts, extra, tx, unlock_time, tx_key, amount_keys);
bool r = cryptonote::construct_tx_and_get_tx_key(m_account.get_keys(), sources, splitted_dsts, extra, tx, unlock_time, tx_key);
THROW_WALLET_EXCEPTION_IF(!r, error::tx_not_constructed, sources, splitted_dsts, unlock_time, m_testnet);
THROW_WALLET_EXCEPTION_IF(upper_transaction_size_limit <= get_object_blobsize(tx), error::tx_too_big, tx, upper_transaction_size_limit);
@ -2924,7 +2928,6 @@ void wallet2::transfer_selected(const std::vector<cryptonote::tx_destination_ent
ptx.change_dts = change_dts;
ptx.selected_transfers = selected_transfers;
ptx.tx_key = tx_key;
ptx.amount_keys = amount_keys;
ptx.dests = dsts;
}
@ -3113,8 +3116,7 @@ void wallet2::transfer_selected_rct(std::vector<cryptonote::tx_destination_entry
dsts.push_back(change_dts);
crypto::secret_key tx_key;
std::vector<crypto::secret_key> amount_keys;
bool r = cryptonote::construct_tx_and_get_tx_keys(m_account.get_keys(), sources, dsts, extra, tx, unlock_time, tx_key, amount_keys, true);
bool r = cryptonote::construct_tx_and_get_tx_key(m_account.get_keys(), sources, dsts, extra, tx, unlock_time, tx_key, true);
THROW_WALLET_EXCEPTION_IF(!r, error::tx_not_constructed, sources, dsts, unlock_time, m_testnet);
THROW_WALLET_EXCEPTION_IF(upper_transaction_size_limit <= get_object_blobsize(tx), error::tx_too_big, tx, upper_transaction_size_limit);
@ -3135,7 +3137,6 @@ void wallet2::transfer_selected_rct(std::vector<cryptonote::tx_destination_entry
ptx.change_dts = change_dts;
ptx.selected_transfers = selected_transfers;
ptx.tx_key = tx_key;
ptx.amount_keys = amount_keys;
ptx.dests = dsts;
}
@ -3764,8 +3765,7 @@ void wallet2::transfer_from(const std::vector<size_t> &outs, size_t num_outputs,
}
crypto::secret_key tx_key;
std::vector<crypto::secret_key> amount_keys;
bool r = cryptonote::construct_tx_and_get_tx_keys(m_account.get_keys(), sources, splitted_dsts, extra, tx, unlock_time, tx_key, amount_keys);
bool r = cryptonote::construct_tx_and_get_tx_key(m_account.get_keys(), sources, splitted_dsts, extra, tx, unlock_time, tx_key);
THROW_WALLET_EXCEPTION_IF(!r, error::tx_not_constructed, sources, splitted_dsts, unlock_time, m_testnet);
THROW_WALLET_EXCEPTION_IF(upper_transaction_size_limit <= get_object_blobsize(tx), error::tx_too_big, tx, upper_transaction_size_limit);
@ -3785,7 +3785,6 @@ void wallet2::transfer_from(const std::vector<size_t> &outs, size_t num_outputs,
ptx.change_dts = change_dts;
ptx.selected_transfers = selected_transfers;
ptx.tx_key = tx_key;
ptx.amount_keys = amount_keys;
ptx.dests = dsts;
}