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rct: do not serialize public keys in outPk

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They can be reconstructed from vout
This commit is contained in:
moneromooo-monero 2016-07-23 12:09:33 +01:00
parent 83ab3151e8
commit cf33e1a52a
No known key found for this signature in database
GPG key ID: 686F07454D6CEFC3
8 changed files with 87 additions and 34 deletions
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35
src/cryptonote_core/blockchain.cpp
View file

@ -2468,11 +2468,12 @@ bool Blockchain::check_tx_inputs(const transaction& tx, tx_verification_context
{
rct::ctkeyM reconstructed_mixRing;
std::vector<rct::keyV> reconstructed_II;
rct::ctkeyV reconstructed_outPk;
// if the tx already has a non empty mixRing, use them,
// else reconstruct them
const rct::ctkeyM &mixRing = tx.rct_signatures.mixRing.empty() ? reconstructed_mixRing : tx.rct_signatures.mixRing;
// always do II, because it's split in the simple version
// always do II, because it's split in the simple version, and always do outPk
// all MGs should have the same II size (1)
for (size_t n = 0; n < tx.rct_signatures.MGs.size(); ++n)
@ -2491,6 +2492,18 @@ bool Blockchain::check_tx_inputs(const transaction& tx, tx_verification_context
reconstructed_II[n].push_back(tx.rct_signatures.MGs[n].II[0]);
}
if (tx.rct_signatures.outPk.size() != tx.vout.size())
{
LOG_PRINT_L1("Failed to check ringct signatures: outPk and vout have different sizes");
return false;
}
reconstructed_outPk.resize(tx.vout.size());
for (size_t n = 0; n < tx.vout.size(); ++n)
{
reconstructed_outPk[n].dest = rct::pk2rct(boost::get<txout_to_key>(tx.vout[n].target).key);
reconstructed_outPk[n].mask = tx.rct_signatures.outPk[n].mask;
}
if (tx.rct_signatures.mixRing.empty())
{
reconstructed_mixRing.resize(pubkeys.size());
@ -2551,7 +2564,7 @@ bool Blockchain::check_tx_inputs(const transaction& tx, tx_verification_context
}
}
if (!rct::verRctSimple(tx.rct_signatures, mixRing, &reconstructed_II, rct::hash2rct(tx_prefix_hash)))
if (!rct::verRctSimple(tx.rct_signatures, mixRing, &reconstructed_II, reconstructed_outPk, rct::hash2rct(tx_prefix_hash)))
{
LOG_PRINT_L1("Failed to check ringct signatures!");
return false;
@ -2561,11 +2574,13 @@ bool Blockchain::check_tx_inputs(const transaction& tx, tx_verification_context
{
rct::ctkeyM reconstructed_mixRing;
rct::keyV reconstructed_II;
rct::ctkeyV reconstructed_outPk;
// if the tx already has a non empty mixRing and/or II, use them,
// else reconstruct them
// else reconstruct them. Always do outPk.
const rct::ctkeyM &mixRing = tx.rct_signatures.mixRing.empty() ? reconstructed_mixRing : tx.rct_signatures.mixRing;
const rct::keyV &II = tx.rct_signatures.MG.II.size() == 1 ? reconstructed_II : tx.rct_signatures.MG.II;
const rct::ctkeyV outPk = reconstructed_outPk;
// RCT needs the same mixin for all inputs
for (size_t n = 1; n < pubkeys.size(); ++n)
@ -2599,6 +2614,18 @@ bool Blockchain::check_tx_inputs(const transaction& tx, tx_verification_context
reconstructed_II.push_back(tx.rct_signatures.MG.II.back());
}
if (tx.rct_signatures.outPk.size() != tx.vout.size())
{
LOG_PRINT_L1("Failed to check ringct signatures: outPk and vout have different sizes");
return false;
}
reconstructed_outPk.resize(tx.vout.size());
for (size_t n = 0; n < tx.vout.size(); ++n)
{
reconstructed_outPk[n].dest = rct::pk2rct(boost::get<txout_to_key>(tx.vout[n].target).key);
reconstructed_outPk[n].mask = tx.rct_signatures.outPk[n].mask;
}
// check all this, either recontructed (so should really pass), or not
{
bool size_matches = true;
@ -2644,7 +2671,7 @@ bool Blockchain::check_tx_inputs(const transaction& tx, tx_verification_context
}
}
if (!rct::verRct(tx.rct_signatures, mixRing, II, rct::hash2rct(tx_prefix_hash)))
if (!rct::verRct(tx.rct_signatures, mixRing, II, outPk, rct::hash2rct(tx_prefix_hash)))
{
LOG_PRINT_L1("Failed to check ringct signatures!");
return false;

23
src/cryptonote_core/cryptonote_boost_serialization.h
View file

@ -43,6 +43,7 @@
#include "common/unordered_containers_boost_serialization.h"
#include "crypto/crypto.h"
#include "ringct/rctTypes.h"
#include "ringct/rctOps.h"
//namespace cryptonote {
namespace boost
@ -221,6 +222,26 @@ namespace boost
a & x.senderPk;
}
inline void serializeOutPk(boost::archive::binary_iarchive &a, rct::ctkeyV &outPk_, const boost::serialization::version_type ver)
{
rct::keyV outPk;
a & outPk;
outPk_.resize(outPk.size());
for (size_t n = 0; n < outPk_.size(); ++n)
{
outPk_[n].dest = rct::identity();
outPk_[n].mask = outPk[n];
}
}
inline void serializeOutPk(boost::archive::binary_oarchive &a, rct::ctkeyV &outPk_, const boost::serialization::version_type ver)
{
rct::keyV outPk(outPk_.size());
for (size_t n = 0; n < outPk_.size(); ++n)
outPk[n] = outPk_[n].mask;
a & outPk;
}
template <class Archive>
inline void serialize(Archive &a, rct::rctSig &x, const boost::serialization::version_type ver)
{
@ -235,7 +256,7 @@ namespace boost
if (x.simple)
a & x.pseudoOuts;
a & x.ecdhInfo;
a & x.outPk;
serializeOutPk(a, x.outPk, ver);
a & x.txnFee;
}
}

8
src/cryptonote_core/cryptonote_core.cpp
View file

@ -569,14 +569,6 @@ namespace cryptonote
LOG_PRINT_RED_L1("tx with mismatched vout/outPk count, rejected for tx id= " << get_transaction_hash(tx));
return false;
}
for (size_t n = 0; n < tx.vout.size(); ++n)
{
if (tx.rct_signatures.outPk[n].dest != boost::get<txout_to_key>(tx.vout[n].target).key)
{
LOG_PRINT_RED_L1("tx ringct public key does not match output public key for tx id= " << get_transaction_hash(tx));
return false;
}
}
}
if(!check_money_overflow(tx))