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crypto/mta: include U in hash for ProofBobWC (#43)

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This commit is contained in:
Luke Plaster
2019-09-11 16:24:06 +08:00
committed by GitHub
parent 31c67c55cf
commit f90989ed35
1 changed files with 3 additions and 3 deletions
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6
crypto/mta/proofs.go
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@@ -54,7 +54,7 @@ func ProveBobWC(pk *paillier.PublicKey, NTilde, h1, h2, c1, c2, x, y, r *big.Int
gamma := random.GetRandomPositiveRelativelyPrimeInt(pk.N)
// 5.
var u *crypto.ECPoint
u := crypto.NewECPoint(tss.EC(), zero, zero) // initialization suppresses an IDE warning
if X != nil {
u = crypto.ScalarBaseMult(tss.EC(), alpha)
}
@@ -90,7 +90,7 @@ func ProveBobWC(pk *paillier.PublicKey, NTilde, h1, h2, c1, c2, x, y, r *big.Int
if X == nil {
eHash = common.SHA512_256i(append(pk.AsInts(), c1, c2, z, zPrm, t, v, w)...)
} else {
eHash = common.SHA512_256i(append(pk.AsInts(), X.X(), X.Y(), c1, c2, z, zPrm, t, v, w)...)
eHash = common.SHA512_256i(append(pk.AsInts(), X.X(), X.Y(), c1, c2, u.X(), u.Y(), z, zPrm, t, v, w)...)
}
e = common.RejectionSample(q, eHash)
}
@@ -158,7 +158,7 @@ func (pf *ProofBobWC) Verify(pk *paillier.PublicKey, NTilde, h1, h2, c1, c2 *big
if X == nil {
eHash = common.SHA512_256i(append(pk.AsInts(), c1, c2, pf.Z, pf.ZPrm, pf.T, pf.V, pf.W)...)
} else {
eHash = common.SHA512_256i(append(pk.AsInts(), X.X(), X.Y(), c1, c2, pf.Z, pf.ZPrm, pf.T, pf.V, pf.W)...)
eHash = common.SHA512_256i(append(pk.AsInts(), X.X(), X.Y(), c1, c2, pf.U.X(), pf.U.Y(), pf.Z, pf.ZPrm, pf.T, pf.V, pf.W)...)
}
e = common.RejectionSample(q, eHash)
}