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Fix sending outputs from a tx with more than one pubkey

Browse source 
A bug in cold signing caused a spurious pubkey to be included
in transactions, so we need to ensure we use the correct one
when sending outputs from one of those.
This commit is contained in:
moneromooo-monero 2016-12-09 18:21:21 +00:00
parent 45bb393577
commit f4a3ce15c1
No known key found for this signature in database
GPG key ID: 686F07454D6CEFC3
4 changed files with 34 additions and 13 deletions
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18
src/cryptonote_core/cryptonote_format_utils.cpp
View file

@ -320,26 +320,26 @@ namespace cryptonote
return true;
}
//---------------------------------------------------------------
crypto::public_key get_tx_pub_key_from_extra(const std::vector<uint8_t>& tx_extra)
crypto::public_key get_tx_pub_key_from_extra(const std::vector<uint8_t>& tx_extra, size_t pk_index)
{
std::vector<tx_extra_field> tx_extra_fields;
parse_tx_extra(tx_extra, tx_extra_fields);
tx_extra_pub_key pub_key_field;
if(!find_tx_extra_field_by_type(tx_extra_fields, pub_key_field))
if(!find_tx_extra_field_by_type(tx_extra_fields, pub_key_field, pk_index))
return null_pkey;
return pub_key_field.pub_key;
}
//---------------------------------------------------------------
crypto::public_key get_tx_pub_key_from_extra(const transaction_prefix& tx_prefix)
crypto::public_key get_tx_pub_key_from_extra(const transaction_prefix& tx_prefix, size_t pk_index)
{
return get_tx_pub_key_from_extra(tx_prefix.extra);
return get_tx_pub_key_from_extra(tx_prefix.extra, pk_index);
}
//---------------------------------------------------------------
crypto::public_key get_tx_pub_key_from_extra(const transaction& tx)
crypto::public_key get_tx_pub_key_from_extra(const transaction& tx, size_t pk_index)
{
return get_tx_pub_key_from_extra(tx.extra);
return get_tx_pub_key_from_extra(tx.extra, pk_index);
}
//---------------------------------------------------------------
bool add_tx_pub_key_to_extra(transaction& tx, const crypto::public_key& tx_pub_key)
@ -534,8 +534,10 @@ namespace cryptonote
uint64_t summary_inputs_money = 0;
//fill inputs
int idx = -1;
BOOST_FOREACH(const tx_source_entry& src_entr, sources)
{
++idx;
if(src_entr.real_output >= src_entr.outputs.size())
{
LOG_ERROR("real_output index (" << src_entr.real_output << ")bigger than output_keys.size()=" << src_entr.outputs.size());
@ -553,9 +555,11 @@ namespace cryptonote
//check that derivated key is equal with real output key
if( !(in_ephemeral.pub == src_entr.outputs[src_entr.real_output].second.dest) )
{
LOG_ERROR("derived public key mismatch with output public key! "<< ENDL << "derived_key:"
LOG_ERROR("derived public key mismatch with output public key at index " << idx << ", real out " << src_entr.real_output << "! "<< ENDL << "derived_key:"
<< string_tools::pod_to_hex(in_ephemeral.pub) << ENDL << "real output_public_key:"
<< string_tools::pod_to_hex(src_entr.outputs[src_entr.real_output].second) );
LOG_ERROR("amount " << src_entr.amount << ", rct " << src_entr.rct);
LOG_ERROR("tx pubkey " << src_entr.real_out_tx_key << ", real_output_in_tx_index " << src_entr.real_output_in_tx_index);
return false;
}

6
src/cryptonote_core/cryptonote_format_utils.h
View file

@ -104,9 +104,9 @@ namespace cryptonote
}
bool parse_tx_extra(const std::vector<uint8_t>& tx_extra, std::vector<tx_extra_field>& tx_extra_fields);
crypto::public_key get_tx_pub_key_from_extra(const std::vector<uint8_t>& tx_extra);
crypto::public_key get_tx_pub_key_from_extra(const transaction_prefix& tx);
crypto::public_key get_tx_pub_key_from_extra(const transaction& tx);
crypto::public_key get_tx_pub_key_from_extra(const std::vector<uint8_t>& tx_extra, size_t pk_index = 0);
crypto::public_key get_tx_pub_key_from_extra(const transaction_prefix& tx, size_t pk_index = 0);
crypto::public_key get_tx_pub_key_from_extra(const transaction& tx, size_t pk_index = 0);
bool add_tx_pub_key_to_extra(transaction& tx, const crypto::public_key& tx_pub_key);
bool add_extra_nonce_to_tx_extra(std::vector<uint8_t>& tx_extra, const blobdata& extra_nonce);
bool remove_field_from_tx_extra(std::vector<uint8_t>& tx_extra, const std::type_info &type);

9
src/wallet/wallet2.cpp
View file

@ -846,6 +846,7 @@ void wallet2::process_new_transaction(const cryptonote::transaction& tx, const s
td.m_key_image = ki[o];
td.m_key_image_known = !m_watch_only;
td.m_amount = tx.vout[o].amount;
td.m_pk_index = pk_index - 1;
if (td.m_amount == 0)
{
td.m_mask = mask[o];
@ -894,6 +895,7 @@ void wallet2::process_new_transaction(const cryptonote::transaction& tx, const s
td.m_tx = (const cryptonote::transaction_prefix&)tx;
td.m_txid = txid();
td.m_amount = tx.vout[o].amount;
td.m_pk_index = pk_index - 1;
if (td.m_amount == 0)
{
td.m_mask = mask[o];
@ -3623,7 +3625,7 @@ void wallet2::transfer_selected(const std::vector<cryptonote::tx_destination_ent
real_oe.second.dest = rct::pk2rct(boost::get<txout_to_key>(td.m_tx.vout[td.m_internal_output_index].target).key);
real_oe.second.mask = rct::commit(td.amount(), td.m_mask);
*it_to_replace = real_oe;
src.real_out_tx_key = get_tx_pub_key_from_extra(td.m_tx);
src.real_out_tx_key = get_tx_pub_key_from_extra(td.m_tx, td.m_pk_index);
src.real_output = it_to_replace - src.outputs.begin();
src.real_output_in_tx_index = td.m_internal_output_index;
detail::print_source_entry(src);
@ -3699,6 +3701,9 @@ void wallet2::transfer_selected_rct(std::vector<cryptonote::tx_destination_entry
uint64_t upper_transaction_size_limit = get_upper_tranaction_size_limit();
uint64_t needed_money = fee;
LOG_PRINT_L2("transfer: starting with fee " << print_money (needed_money));
LOG_PRINT_L0("selected transfers: ");
for (auto t: selected_transfers)
LOG_PRINT_L2(" " << t);
// calculate total amount being sent to all destinations
// throw if total amount overflows uint64_t
@ -3759,7 +3764,7 @@ void wallet2::transfer_selected_rct(std::vector<cryptonote::tx_destination_entry
real_oe.second.dest = rct::pk2rct(boost::get<txout_to_key>(td.m_tx.vout[td.m_internal_output_index].target).key);
real_oe.second.mask = rct::commit(td.amount(), td.m_mask);
*it_to_replace = real_oe;
src.real_out_tx_key = get_tx_pub_key_from_extra(td.m_tx);
src.real_out_tx_key = get_tx_pub_key_from_extra(td.m_tx, td.m_pk_index);
src.real_output = it_to_replace - src.outputs.begin();
src.real_output_in_tx_index = td.m_internal_output_index;
src.mask = td.m_mask;

14
src/wallet/wallet2.h
View file

@ -129,6 +129,7 @@ namespace tools
uint64_t m_amount;
bool m_rct;
bool m_key_image_known;
size_t m_pk_index;
bool is_rct() const { return m_rct; }
uint64_t amount() const { return m_amount; }
@ -147,6 +148,7 @@ namespace tools
FIELD(m_amount)
FIELD(m_rct)
FIELD(m_key_image_known)
FIELD(m_pk_index)
END_SERIALIZE()
};
@ -644,7 +646,7 @@ namespace tools
};
}
BOOST_CLASS_VERSION(tools::wallet2, 15)
BOOST_CLASS_VERSION(tools::wallet2::transfer_details, 6)
BOOST_CLASS_VERSION(tools::wallet2::transfer_details, 7)
BOOST_CLASS_VERSION(tools::wallet2::payment_details, 1)
BOOST_CLASS_VERSION(tools::wallet2::unconfirmed_transfer_details, 6)
BOOST_CLASS_VERSION(tools::wallet2::confirmed_transfer_details, 3)
@ -677,6 +679,10 @@ namespace boost
{
x.m_key_image_known = true;
}
if (ver < 7)
{
x.m_pk_index = 0;
}
}
template <class Archive>
@ -738,6 +744,12 @@ namespace boost
return;
}
a & x.m_key_image_known;
if (ver < 7)
{
initialize_transfer_details(a, x, ver);
return;
}
a & x.m_pk_index;
}
template <class Archive>