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ringct: use dummy bulletproofs when in fake mode, for speed

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This commit is contained in:
moneromooo-monero
2018-10-19 11:15:31 +00:00
parent 1e74586ee9
commit d6937e373b
4 changed files with 49 additions and 12 deletions
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src/ringct/rctSigs.cpp
+41 -8
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@@ -44,6 +44,19 @@ using namespace std;
#define CHECK_AND_ASSERT_MES_L1(expr, ret, message) {if(!(expr)) {MCERROR("verify", message); return ret;}}
namespace
{
rct::Bulletproof make_dummy_bulletproof(size_t n_outs)
{
const rct::key I = rct::identity();
size_t nrl = 0;
while ((1u << nrl) < n_outs)
++nrl;
nrl += 6;
return rct::Bulletproof{rct::keyV(n_outs, I), I, I, I, I, I, I, rct::keyV(nrl, I), rct::keyV(nrl, I), I, I, I};
}
}
namespace rct {
Bulletproof proveRangeBulletproof(key &C, key &mask, uint64_t amount)
{
@@ -762,10 +775,20 @@ namespace rct {
if (range_proof_type == RangeProofPaddedBulletproof)
{
rct::keyV C, masks;
rv.p.bulletproofs.push_back(proveRangeBulletproof(C, masks, outamounts));
#ifdef DBG
CHECK_AND_ASSERT_THROW_MES(verBulletproof(rv.p.bulletproofs.back()), "verBulletproof failed on newly created proof");
#endif
if (hwdev.get_mode() == hw::device::TRANSACTION_CREATE_FAKE)
{
// use a fake bulletproof for speed
rv.p.bulletproofs.push_back(make_dummy_bulletproof(outamounts.size()));
C = rct::keyV(outamounts.size(), I);
masks = rct::keyV(outamounts.size(), I);
}
else
{
rv.p.bulletproofs.push_back(proveRangeBulletproof(C, masks, outamounts));
#ifdef DBG
CHECK_AND_ASSERT_THROW_MES(verBulletproof(rv.p.bulletproofs.back()), "verBulletproof failed on newly created proof");
#endif
}
for (i = 0; i < outamounts.size(); ++i)
{
rv.outPk[i].mask = rct::scalarmult8(C[i]);
@@ -782,10 +805,20 @@ namespace rct {
std::vector<uint64_t> batch_amounts(batch_size);
for (i = 0; i < batch_size; ++i)
batch_amounts[i] = outamounts[i + amounts_proved];
rv.p.bulletproofs.push_back(proveRangeBulletproof(C, masks, batch_amounts));
#ifdef DBG
CHECK_AND_ASSERT_THROW_MES(verBulletproof(rv.p.bulletproofs.back()), "verBulletproof failed on newly created proof");
#endif
if (hwdev.get_mode() == hw::device::TRANSACTION_CREATE_FAKE)
{
// use a fake bulletproof for speed
rv.p.bulletproofs.push_back(make_dummy_bulletproof(batch_amounts.size()));
C = rct::keyV(batch_amounts.size(), I);
masks = rct::keyV(batch_amounts.size(), I);
}
else
{
rv.p.bulletproofs.push_back(proveRangeBulletproof(C, masks, batch_amounts));
#ifdef DBG
CHECK_AND_ASSERT_THROW_MES(verBulletproof(rv.p.bulletproofs.back()), "verBulletproof failed on newly created proof");
#endif
}
for (i = 0; i < batch_size; ++i)
{
rv.outPk[i + amounts_proved].mask = rct::scalarmult8(C[i]);