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Diffstat (limited to '')
| -rw-r--r-- | src/wallet/wallet2.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp index 221dd8e0b..6d8d7c003 100644 --- a/src/wallet/wallet2.cpp +++ b/src/wallet/wallet2.cpp @@ -3521,6 +3521,23 @@ void wallet2::get_outs(std::vector<std::vector<entry>> &outs, const std::list<si outs.back().reserve(fake_outputs_count + 1); const rct::key mask = td.is_rct() ? rct::commit(td.amount(), td.m_mask) : rct::zeroCommit(td.amount()); + // make sure the real outputs we asked for are really included, along + // with the correct key and mask: this guards against an active attack + // where the node sends dummy data for all outputs, and we then send + // the real one, which the node can then tell from the fake outputs, + // as it has different data than the dummy data it had sent earlier + bool real_out_found = false; + for (size_t n = 0; n < requested_outputs_count; ++n) + { + size_t i = base + n; + if (req.outputs[i].index == td.m_global_output_index) + if (daemon_resp.outs[i].key == boost::get<txout_to_key>(td.m_tx.vout[td.m_internal_output_index].target).key) + if (daemon_resp.outs[i].mask == mask) + real_out_found = true; + } + THROW_WALLET_EXCEPTION_IF(!real_out_found, error::wallet_internal_error, + "Daemon response did not include the requested real output"); + // pick real out first (it will be sorted when done) outs.back().push_back(std::make_tuple(td.m_global_output_index, boost::get<txout_to_key>(td.m_tx.vout[td.m_internal_output_index].target).key, mask)); |