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rct: change the simple flag to a type 

for future expansion
This commit is contained in:
moneromooo-monero 2016-08-08 13:49:42 +01:00
parent c5be4b0bea
commit 3ab2ab3e76
No known key found for this signature in database
GPG Key ID: 686F07454D6CEFC3
8 changed files with 46 additions and 25 deletions
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12
src/cryptonote_core/blockchain.cpp
View File

@ -2464,8 +2464,9 @@ bool Blockchain::check_tx_inputs(const transaction& tx, tx_verification_context
// from version 2, check ringct signatures
// obviously, the original and simple rct APIs use a mixRing that's indexes
// in opposite orders, because it'd be too simple otherwise...
if (tx.rct_signatures.simple)
switch (tx.rct_signatures.type)
{
case rct::RCTTypeSimple: {
rct::ctkeyM reconstructed_mixRing;
std::vector<rct::keyV> reconstructed_II;
rct::ctkeyV reconstructed_outPk;
@ -2568,9 +2569,9 @@ bool Blockchain::check_tx_inputs(const transaction& tx, tx_verification_context
LOG_PRINT_L1("Failed to check ringct signatures!");
return false;
}
break;
}
else
{
case rct::RCTTypeFull: {
rct::ctkeyM reconstructed_mixRing;
rct::keyV reconstructed_II;
rct::ctkeyV reconstructed_outPk;
@ -2674,6 +2675,11 @@ bool Blockchain::check_tx_inputs(const transaction& tx, tx_verification_context
LOG_PRINT_L1("Failed to check ringct signatures!");
return false;
}
break;
}
default:
LOG_PRINT_L1("Unsupported rct type: " << tx.rct_signatures.type);
return false;
}
}
return true;

11
src/cryptonote_core/cryptonote_basic.h
View File

@ -231,18 +231,21 @@ namespace cryptonote
else
{
FIELD(rct_signatures)
if (rct_signatures.simple)
switch (rct_signatures.type)
{
case rct::RCTTypeSimple:
if (rct_signatures.mixRing.size() && rct_signatures.mixRing.size() != vin.size())
return false;
}
else
{
break;
case rct::RCTTypeFull:
for (size_t i = 0; i < rct_signatures.mixRing.size(); ++i)
{
if (rct_signatures.mixRing[i].size() != vin.size())
return false;
}
break;
default:
return false;
}
}
END_SERIALIZE()

10
src/cryptonote_core/cryptonote_boost_serialization.h
View File

@ -248,15 +248,17 @@ namespace boost
template <class Archive>
inline void serialize(Archive &a, rct::rctSig &x, const boost::serialization::version_type ver)
{
a & x.simple;
a & x.type;
if (x.type != rct::RCTTypeFull && x.type != rct::RCTTypeSimple)
throw boost::archive::archive_exception(boost::archive::archive_exception::other_exception, "Unsupported rct type");
// a & x.message; message is not serialized, as it can be reconstructed from the tx data
a & x.rangeSigs;
if (x.simple)
if (x.type == rct::RCTTypeSimple)
a & x.MGs;
else
if (x.type == rct::RCTTypeFull)
a & x.MG;
// a & x.mixRing; mixRing is not serialized, as it can be reconstructed from the offsets
if (x.simple)
if (x.type == rct::RCTTypeSimple)
a & x.pseudoOuts;
a & x.ecdhInfo;
serializeOutPk(a, x.outPk, ver);

12
src/ringct/rctSigs.cpp
View File

@ -563,7 +563,7 @@ namespace rct {
}
rctSig rv;
rv.simple = false;
rv.type = RCTTypeFull;
rv.outPk.resize(destinations.size());
rv.rangeSigs.resize(destinations.size());
rv.ecdhInfo.resize(destinations.size());
@ -625,7 +625,7 @@ namespace rct {
}
rctSig rv;
rv.simple = true;
rv.type = RCTTypeSimple;
rv.message = message;
rv.outPk.resize(destinations.size());
rv.rangeSigs.resize(destinations.size());
@ -700,7 +700,7 @@ namespace rct {
// uses the attached ecdh info to find the amounts represented by each output commitment
// must know the destination private key to find the correct amount, else will return a random number
bool verRct(const rctSig & rv, const ctkeyM &mixRing, const keyV &II, const ctkeyV &outPk, const key &message) {
CHECK_AND_ASSERT_MES(!rv.simple, false, "verRct called on simple rctSig");
CHECK_AND_ASSERT_MES(rv.type == RCTTypeFull, false, "verRct called on non-full rctSig");
CHECK_AND_ASSERT_MES(outPk.size() == rv.rangeSigs.size(), false, "Mismatched sizes of outPk and rv.rangeSigs");
CHECK_AND_ASSERT_MES(outPk.size() == rv.ecdhInfo.size(), false, "Mismatched sizes of outPk and rv.ecdhInfo");
@ -739,7 +739,7 @@ namespace rct {
size_t i = 0;
bool rvb = true;
CHECK_AND_ASSERT_MES(rv.simple, false, "verRctSimple called on non simple rctSig");
CHECK_AND_ASSERT_MES(rv.type == RCTTypeSimple, false, "verRctSimple called on non simple rctSig");
CHECK_AND_ASSERT_MES(outPk.size() == rv.rangeSigs.size(), false, "Mismatched sizes of outPk and rv.rangeSigs");
CHECK_AND_ASSERT_MES(outPk.size() == rv.ecdhInfo.size(), false, "Mismatched sizes of outPk and rv.ecdhInfo");
CHECK_AND_ASSERT_MES(rv.pseudoOuts.size() == rv.MGs.size(), false, "Mismatched sizes of rv.pseudoOuts and rv.MGs");
@ -803,7 +803,7 @@ namespace rct {
// uses the attached ecdh info to find the amounts represented by each output commitment
// must know the destination private key to find the correct amount, else will return a random number
static xmr_amount decodeRctMain(const rctSig & rv, const key & sk, unsigned int i, key & mask, void (*decode)(ecdhTuple&, const key&)) {
CHECK_AND_ASSERT_MES(!rv.simple, false, "decodeRct called on simple rctSig");
CHECK_AND_ASSERT_MES(rv.type == RCTTypeFull, false, "decodeRct called on non-full rctSig");
CHECK_AND_ASSERT_THROW_MES(rv.rangeSigs.size() > 0, "Empty rv.rangeSigs");
CHECK_AND_ASSERT_THROW_MES(rv.outPk.size() == rv.rangeSigs.size(), "Mismatched sizes of rv.outPk and rv.rangeSigs");
CHECK_AND_ASSERT_THROW_MES(i < rv.ecdhInfo.size(), "Bad index");
@ -840,7 +840,7 @@ namespace rct {
}
static xmr_amount decodeRctSimpleMain(const rctSig & rv, const key & sk, unsigned int i, key &mask, void (*decode)(ecdhTuple &ecdh, const key&)) {
CHECK_AND_ASSERT_MES(rv.simple, false, "decodeRct called on non simple rctSig");
CHECK_AND_ASSERT_MES(rv.type == RCTTypeSimple, false, "decodeRct called on non simple rctSig");
CHECK_AND_ASSERT_THROW_MES(rv.rangeSigs.size() > 0, "Empty rv.rangeSigs");
CHECK_AND_ASSERT_THROW_MES(rv.outPk.size() == rv.rangeSigs.size(), "Mismatched sizes of rv.outPk and rv.rangeSigs");
CHECK_AND_ASSERT_THROW_MES(i < rv.ecdhInfo.size(), "Bad index");

12
src/ringct/rctTypes.h
View File

@ -173,8 +173,12 @@ namespace rct {
// ecdhInfo holds an encoded mask / amount to be passed to each receiver
// outPk contains public keypairs which are destinations (P, C),
// P = address, C = commitment to amount
enum {
RCTTypeFull = 0,
RCTTypeSimple = 1,
};
struct rctSig {
bool simple;
uint8_t type;
key message;
vector<rangeSig> rangeSigs;
mgSig MG; // for non simple rct
@ -187,15 +191,15 @@ namespace rct {
xmr_amount txnFee; // contains b
BEGIN_SERIALIZE_OBJECT()
FIELD(simple)
FIELD(type)
// FIELD(message) - not serialized, it can be reconstructed
FIELD(rangeSigs)
if (simple)
if (type == RCTTypeSimple)
FIELD(MGs)
else
FIELD(MG)
// FIELD(mixRing) - not serialized, it can be reconstructed
if (simple)
if (type == RCTTypeSimple)
FIELD(pseudoOuts)
FIELD(ecdhInfo)
if (typename Archive<W>::is_saving()) {

10
src/wallet/wallet2.cpp
View File

@ -211,10 +211,16 @@ static uint64_t decodeRct(const rct::rctSig & rv, const rct::key & sk, unsigned
{
try
{
if (rv.simple)
switch (rv.type)
{
case rct::RCTTypeSimple:
return rct::decodeRctSimpleFromSharedSecret(rv, sk, i, mask);
else
case rct::RCTTypeFull:
return rct::decodeRctFromSharedSecret(rv, sk, i, mask);
default:
LOG_ERROR("Unsupported rct type: " << rv.type);
return 0;
}
}
catch (const std::exception &e)
{

2
tests/core_tests/rct.cpp
View File

@ -126,7 +126,7 @@ bool gen_rct_tx_validation_base::generate_with(std::vector<test_event_entry>& ev
for (size_t o = 0; o < 4; ++o)
{
rct::key amount_key = rct::hash_to_scalar(rct::scalarmultKey(rct::pk2rct(tx_pub_key), rct::sk2rct(miner_accounts[n].get_keys().m_view_secret_key)));
if (rct_txes[n].rct_signatures.simple)
if (rct_txes[n].rct_signatures.type == rct::RCTTypeSimple)
rct::decodeRctSimpleFromSharedSecret(rct_txes[n].rct_signatures, amount_key, o, rct_tx_masks[o+n*4]);
else
rct::decodeRctFromSharedSecret(rct_txes[n].rct_signatures, amount_key, o, rct_tx_masks[o+n*4]);

2
tests/unit_tests/serialization.cpp
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@ -591,7 +591,7 @@ TEST(Serialization, serializes_ringct_types)
ASSERT_TRUE(serialization::dump_binary(s0, blob));
ASSERT_TRUE(serialization::parse_binary(blob, s1));
ASSERT_TRUE(s0.simple == s1.simple);
ASSERT_TRUE(s0.type == s1.type);
ASSERT_TRUE(s0.rangeSigs.size() == s1.rangeSigs.size());
for (size_t n = 0; n < s0.rangeSigs.size(); ++n)
{