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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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28
src/ringct/rctSigs.cpp
View file

@ -679,10 +679,10 @@ namespace rct {
//decodeRct: (c.f. http://eprint.iacr.org/2015/1098 section 5.1.1)
// 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 key &message) {
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.outPk.size() == rv.rangeSigs.size(), false, "Mismatched sizes of rv.outPk and rv.rangeSigs");
CHECK_AND_ASSERT_MES(rv.outPk.size() == rv.ecdhInfo.size(), false, "Mismatched sizes of rv.outPk and rv.ecdhInfo");
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");
// some rct ops can throw
try
@ -691,14 +691,14 @@ namespace rct {
bool rvb = true;
bool tmp;
DP("range proofs verified?");
for (i = 0; i < rv.outPk.size(); i++) {
tmp = verRange(rv.outPk[i].mask, rv.rangeSigs[i]);
for (i = 0; i < outPk.size(); i++) {
tmp = verRange(outPk[i].mask, rv.rangeSigs[i]);
DP(tmp);
rvb = (rvb && tmp);
}
//compute txn fee
key txnFeeKey = scalarmultH(d2h(rv.txnFee));
bool mgVerd = verRctMG(rv.MG, II, mixRing, rv.outPk, txnFeeKey, message);
bool mgVerd = verRctMG(rv.MG, II, mixRing, outPk, txnFeeKey, message);
DP("mg sig verified?");
DP(mgVerd);
@ -710,18 +710,18 @@ namespace rct {
}
}
bool verRct(const rctSig & rv) {
return verRct(rv, rv.mixRing, rv.MG.II, rv.message);
return verRct(rv, rv.mixRing, rv.MG.II, rv.outPk, rv.message);
}
//ver RingCT simple
//assumes only post-rct style inputs (at least for max anonymity)
bool verRctSimple(const rctSig & rv, const ctkeyM &mixRing, const std::vector<keyV> *II, const key &message) {
bool verRctSimple(const rctSig & rv, const ctkeyM &mixRing, const std::vector<keyV> *II, const ctkeyV &outPk, const key &message) {
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.outPk.size() == rv.rangeSigs.size(), false, "Mismatched sizes of rv.outPk and rv.rangeSigs");
CHECK_AND_ASSERT_MES(rv.outPk.size() == rv.ecdhInfo.size(), false, "Mismatched sizes of rv.outPk and rv.ecdhInfo");
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");
CHECK_AND_ASSERT_MES(rv.pseudoOuts.size() == mixRing.size(), false, "Mismatched sizes of rv.pseudoOuts and mixRing");
CHECK_AND_ASSERT_MES(!II || II->size() == mixRing.size(), false, "Mismatched II/mixRing size");
@ -734,11 +734,11 @@ namespace rct {
}
key sumOutpks = identity();
for (i = 0; i < rv.outPk.size(); i++) {
if (!verRange(rv.outPk[i].mask, rv.rangeSigs[i])) {
for (i = 0; i < outPk.size(); i++) {
if (!verRange(outPk[i].mask, rv.rangeSigs[i])) {
return false;
}
addKeys(sumOutpks, sumOutpks, rv.outPk[i].mask);
addKeys(sumOutpks, sumOutpks, outPk[i].mask);
}
DP(sumOutpks);
key txnFeeKey = scalarmultH(d2h(rv.txnFee));
@ -769,7 +769,7 @@ namespace rct {
}
bool verRctSimple(const rctSig & rv) {
return verRctSimple(rv, rv.mixRing, NULL, rv.message);
return verRctSimple(rv, rv.mixRing, NULL, rv.outPk, rv.message);
}
//RingCT protocol

4
src/ringct/rctSigs.h
View file

@ -140,9 +140,9 @@ namespace rct {
rctSig genRctSimple(const key & message, const ctkeyV & inSk, const ctkeyV & inPk, const keyV & destinations, const vector<xmr_amount> & inamounts, const vector<xmr_amount> & outamounts, xmr_amount txnFee, unsigned int mixin);
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 std::vector<unsigned int> & index, ctkeyV &outSk);
bool verRct(const rctSig & rv);
bool verRct(const rctSig & rv, const ctkeyM &mixRing, const keyV &II, const key &message);
bool verRct(const rctSig & rv, const ctkeyM &mixRing, const keyV &II, const ctkeyV &outPk, const key &message);
bool verRctSimple(const rctSig & rv);
bool verRctSimple(const rctSig & rv, const ctkeyM &mixRing, const std::vector<keyV> *II, const key &message);
bool verRctSimple(const rctSig & rv, const ctkeyM &mixRing, const std::vector<keyV> *II, const ctkeyV &outPk, const key &message);
xmr_amount decodeRct(const rctSig & rv, const key & sk, unsigned int i, key & mask);
xmr_amount decodeRct(const rctSig & rv, const key & sk, unsigned int i);
xmr_amount decodeRctSimple(const rctSig & rv, const key & sk, unsigned int i);

14
src/ringct/rctTypes.h
View file

@ -207,7 +207,19 @@ namespace rct {
if (simple)
FIELD(pseudoOuts)
FIELD(ecdhInfo)
FIELD(outPk)
if (typename Archive<W>::is_saving()) {
keyV outPk(this->outPk.size());
for (size_t n = 0; n < outPk.size(); ++n)
outPk[n] = this->outPk[n].mask;
FIELD(outPk)
}
else {
keyV outPk;
FIELD(outPk)
this->outPk.resize(outPk.size());
for (size_t n = 0; n < outPk.size(); ++n)
this->outPk[n].mask = outPk[n];
}
FIELD(txnFee)
END_SERIALIZE()
};