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integrate bulletproofs into monero

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moneromooo-monero
2017-12-02 08:32:39 +00:00
parent 90b8d9f271
commit d58835b2f6
9 changed files with 164 additions and 71 deletions
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64
src/ringct/rctSigs.cpp
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@@ -33,6 +33,7 @@
#include "common/threadpool.h"
#include "common/util.h"
#include "rctSigs.h"
#include "bulletproofs.h"
#include "cryptonote_basic/cryptonote_format_utils.h"
using namespace crypto;
@@ -42,6 +43,14 @@ using namespace std;
#define MONERO_DEFAULT_LOG_CATEGORY "ringct"
namespace rct {
Bulletproof proveRangeBulletproof(key &C, key &mask, uint64_t amount)
{
mask = rct::skGen();
Bulletproof proof = bulletproof_PROVE(amount, mask);
C = proof.V;
return proof;
}
//Borromean (c.f. gmax/andytoshi's paper)
boroSig genBorromean(const key64 x, const key64 P1, const key64 P2, const bits indices) {
key64 L[2], alpha;
@@ -563,7 +572,7 @@ namespace rct {
// must know the destination private key to find the correct amount, else will return a random number
// Note: For txn fees, the last index in the amounts vector should contain that
// Thus the amounts vector will be "one" longer than the destinations vectort
rctSig genRct(const key &message, const ctkeyV & inSk, const keyV & destinations, const vector<xmr_amount> & amounts, const ctkeyM &mixRing, const keyV &amount_keys, unsigned int index, ctkeyV &outSk) {
rctSig genRct(const key &message, const ctkeyV & inSk, const keyV & destinations, const vector<xmr_amount> & amounts, const ctkeyM &mixRing, const keyV &amount_keys, unsigned int index, ctkeyV &outSk, bool bulletproof) {
CHECK_AND_ASSERT_THROW_MES(amounts.size() == destinations.size() || amounts.size() == destinations.size() + 1, "Different number of amounts/destinations");
CHECK_AND_ASSERT_THROW_MES(amount_keys.size() == destinations.size(), "Different number of amount_keys/destinations");
CHECK_AND_ASSERT_THROW_MES(index < mixRing.size(), "Bad index into mixRing");
@@ -585,8 +594,14 @@ namespace rct {
//add destination to sig
rv.outPk[i].dest = copy(destinations[i]);
//compute range proof
rv.p.rangeSigs[i] = proveRange(rv.outPk[i].mask, outSk[i].mask, amounts[i]);
if (bulletproof)
rv.p.bulletproofs[i] = proveRangeBulletproof(rv.outPk[i].mask, outSk[i].mask, amounts[i]);
else
rv.p.rangeSigs[i] = proveRange(rv.outPk[i].mask, outSk[i].mask, amounts[i]);
#ifdef DBG
if (bulletproof)
CHECK_AND_ASSERT_THROW_MES(bulletproof_VERIFY(rv.p.bulletproofs[i]), "bulletproof_VERIFY failed on newly created proof");
else
CHECK_AND_ASSERT_THROW_MES(verRange(rv.outPk[i].mask, rv.p.rangeSigs[i]), "verRange failed on newly created proof");
#endif
@@ -618,12 +633,12 @@ namespace rct {
ctkeyM mixRing;
ctkeyV outSk;
tie(mixRing, index) = populateFromBlockchain(inPk, mixin);
return genRct(message, inSk, destinations, amounts, mixRing, amount_keys, index, outSk);
return genRct(message, inSk, destinations, amounts, mixRing, amount_keys, index, outSk, false);
}
//RCT simple
//for post-rct only
rctSig genRctSimple(const key &message, const ctkeyV & inSk, const keyV & destinations, const vector<xmr_amount> &inamounts, const vector<xmr_amount> &outamounts, xmr_amount txnFee, const ctkeyM & mixRing, const keyV &amount_keys, const std::vector<unsigned int> & index, ctkeyV &outSk) {
rctSig genRctSimple(const key &message, const ctkeyV & inSk, const keyV & destinations, const vector<xmr_amount> &inamounts, const vector<xmr_amount> &outamounts, xmr_amount txnFee, const ctkeyM & mixRing, const keyV &amount_keys, const std::vector<unsigned int> & index, ctkeyV &outSk, bool bulletproof) {
CHECK_AND_ASSERT_THROW_MES(inamounts.size() > 0, "Empty inamounts");
CHECK_AND_ASSERT_THROW_MES(inamounts.size() == inSk.size(), "Different number of inamounts/inSk");
CHECK_AND_ASSERT_THROW_MES(outamounts.size() == destinations.size(), "Different number of amounts/destinations");
@@ -638,7 +653,10 @@ namespace rct {
rv.type = RCTTypeSimple;
rv.message = message;
rv.outPk.resize(destinations.size());
rv.p.rangeSigs.resize(destinations.size());
if (bulletproof)
rv.p.bulletproofs.resize(destinations.size());
else
rv.p.rangeSigs.resize(destinations.size());
rv.ecdhInfo.resize(destinations.size());
size_t i;
@@ -650,10 +668,16 @@ namespace rct {
//add destination to sig
rv.outPk[i].dest = copy(destinations[i]);
//compute range proof
rv.p.rangeSigs[i] = proveRange(rv.outPk[i].mask, outSk[i].mask, outamounts[i]);
#ifdef DBG
verRange(rv.outPk[i].mask, rv.p.rangeSigs[i]);
#endif
if (bulletproof)
rv.p.bulletproofs[i] = proveRangeBulletproof(rv.outPk[i].mask, outSk[i].mask, outamounts[i]);
else
rv.p.rangeSigs[i] = proveRange(rv.outPk[i].mask, outSk[i].mask, outamounts[i]);
#ifdef DBG
if (bulletproof)
CHECK_AND_ASSERT_THROW_MES(bulletproof_VERIFY(rv.p.bulletproofs[i]), "bulletproof_VERIFY failed on newly created proof");
else
CHECK_AND_ASSERT_THROW_MES(verRange(rv.outPk[i].mask, rv.p.rangeSigs[i]), "verRange failed on newly created proof");
#endif
sc_add(sumout.bytes, outSk[i].mask.bytes, sumout.bytes);
@@ -699,7 +723,7 @@ namespace rct {
mixRing[i].resize(mixin+1);
index[i] = populateFromBlockchainSimple(mixRing[i], inPk[i], mixin);
}
return genRctSimple(message, inSk, destinations, inamounts, outamounts, txnFee, mixRing, amount_keys, index, outSk);
return genRctSimple(message, inSk, destinations, inamounts, outamounts, txnFee, mixRing, amount_keys, index, outSk, false);
}
//RingCT protocol
@@ -717,7 +741,10 @@ namespace rct {
CHECK_AND_ASSERT_MES(rv.type == RCTTypeFull, false, "verRct called on non-full rctSig");
if (semantics)
{
CHECK_AND_ASSERT_MES(rv.outPk.size() == rv.p.rangeSigs.size(), false, "Mismatched sizes of outPk and rv.p.rangeSigs");
if (rv.p.rangeSigs.empty())
CHECK_AND_ASSERT_MES(rv.outPk.size() == rv.p.bulletproofs.size(), false, "Mismatched sizes of outPk and rv.p.bulletproofs");
else
CHECK_AND_ASSERT_MES(rv.outPk.size() == rv.p.rangeSigs.size(), false, "Mismatched sizes of outPk and rv.p.rangeSigs");
CHECK_AND_ASSERT_MES(rv.outPk.size() == rv.ecdhInfo.size(), false, "Mismatched sizes of outPk and rv.ecdhInfo");
CHECK_AND_ASSERT_MES(rv.p.MGs.size() == 1, false, "full rctSig has not one MG");
}
@@ -736,7 +763,10 @@ namespace rct {
DP("range proofs verified?");
for (size_t i = 0; i < rv.outPk.size(); i++) {
tpool.submit(&waiter, [&, i] {
results[i] = verRange(rv.outPk[i].mask, rv.p.rangeSigs[i]);
if (rv.p.rangeSigs.empty())
results[i] = bulletproof_VERIFY(rv.p.bulletproofs[i]); // TODO
else
results[i] = verRange(rv.outPk[i].mask, rv.p.rangeSigs[i]);
});
}
waiter.wait();
@@ -779,7 +809,10 @@ namespace rct {
CHECK_AND_ASSERT_MES(rv.type == RCTTypeSimple, false, "verRctSimple called on non simple rctSig");
if (semantics)
{
CHECK_AND_ASSERT_MES(rv.outPk.size() == rv.p.rangeSigs.size(), false, "Mismatched sizes of outPk and rv.p.rangeSigs");
if (rv.p.rangeSigs.empty())
CHECK_AND_ASSERT_MES(rv.outPk.size() == rv.p.bulletproofs.size(), false, "Mismatched sizes of outPk and rv.p.bulletproofs");
else
CHECK_AND_ASSERT_MES(rv.outPk.size() == rv.p.rangeSigs.size(), false, "Mismatched sizes of outPk and rv.p.rangeSigs");
CHECK_AND_ASSERT_MES(rv.outPk.size() == rv.ecdhInfo.size(), false, "Mismatched sizes of outPk and rv.ecdhInfo");
CHECK_AND_ASSERT_MES(rv.pseudoOuts.size() == rv.p.MGs.size(), false, "Mismatched sizes of rv.pseudoOuts and rv.p.MGs");
}
@@ -820,7 +853,10 @@ namespace rct {
results.resize(rv.outPk.size());
for (size_t i = 0; i < rv.outPk.size(); i++) {
tpool.submit(&waiter, [&, i] {
results[i] = verRange(rv.outPk[i].mask, rv.p.rangeSigs[i]);
if (rv.p.rangeSigs.empty())
results[i] = bulletproof_VERIFY(rv.p.bulletproofs[i]);
else
results[i] = verRange(rv.outPk[i].mask, rv.p.rangeSigs[i]);
});
}
waiter.wait();