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ringct: fix dummy bulletproofs on ledger in fake mode

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Ledger does some basic checks on them
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moneromooo-monero 2018-11-30 13:33:29 +00:00
parent 58ce16d4d9
commit ac665418f0
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GPG key ID: 686F07454D6CEFC3
1 changed files with 24 additions and 7 deletions
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31
src/ringct/rctSigs.cpp
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@ -46,13 +46,34 @@ using namespace std;
namespace namespace
{ {
rct::Bulletproof make_dummy_bulletproof(size_t n_outs) rct::Bulletproof make_dummy_bulletproof(const std::vector<uint64_t> &outamounts, rct::keyV &C, rct::keyV &masks)
{ {
const size_t n_outs = outamounts.size();
const rct::key I = rct::identity(); const rct::key I = rct::identity();
size_t nrl = 0; size_t nrl = 0;
while ((1u << nrl) < n_outs) while ((1u << nrl) < n_outs)
++nrl; ++nrl;
nrl += 6; nrl += 6;
C.resize(n_outs);
masks.resize(n_outs);
for (size_t i = 0; i < n_outs; ++i)
{
masks[i] = I;
rct::key sv8, sv;
sv = rct::zero();
sv.bytes[0] = outamounts[i] & 255;
sv.bytes[1] = (outamounts[i] >> 8) & 255;
sv.bytes[2] = (outamounts[i] >> 16) & 255;
sv.bytes[3] = (outamounts[i] >> 24) & 255;
sv.bytes[4] = (outamounts[i] >> 32) & 255;
sv.bytes[5] = (outamounts[i] >> 40) & 255;
sv.bytes[6] = (outamounts[i] >> 48) & 255;
sv.bytes[7] = (outamounts[i] >> 56) & 255;
sc_mul(sv8.bytes, sv.bytes, rct::INV_EIGHT.bytes);
rct::addKeys2(C[i], rct::INV_EIGHT, sv8, rct::H);
}
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}; 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};
} }
} }
@ -769,9 +790,7 @@ namespace rct {
if (hwdev.get_mode() == hw::device::TRANSACTION_CREATE_FAKE) if (hwdev.get_mode() == hw::device::TRANSACTION_CREATE_FAKE)
{ {
// use a fake bulletproof for speed // use a fake bulletproof for speed
rv.p.bulletproofs.push_back(make_dummy_bulletproof(outamounts.size())); rv.p.bulletproofs.push_back(make_dummy_bulletproof(outamounts, C, masks));
C = rct::keyV(outamounts.size(), I);
masks = rct::keyV(outamounts.size(), I);
} }
else else
{ {
@ -799,9 +818,7 @@ namespace rct {
if (hwdev.get_mode() == hw::device::TRANSACTION_CREATE_FAKE) if (hwdev.get_mode() == hw::device::TRANSACTION_CREATE_FAKE)
{ {
// use a fake bulletproof for speed // use a fake bulletproof for speed
rv.p.bulletproofs.push_back(make_dummy_bulletproof(batch_amounts.size())); rv.p.bulletproofs.push_back(make_dummy_bulletproof(batch_amounts, C, masks));
C = rct::keyV(batch_amounts.size(), I);
masks = rct::keyV(batch_amounts.size(), I);
} }
else else
{ {