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Update BabyJubJub signature with Poseidon

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arnaucube
2020-03-03 12:42:18 +01:00
parent 937500b203
commit 97c76ce614
2 changed files with 6 additions and 6 deletions
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8
babyjub/eddsa.go
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@@ -222,8 +222,8 @@ func (k *PrivateKey) SignPoseidon(msg *big.Int) *Signature {
r.Mod(r, SubOrder)
R8 := NewPoint().Mul(r, B8) // R8 = r * 8 * B
A := k.Public().Point()
hmInput := []*big.Int{R8.X, R8.Y, A.X, A.Y, msg}
hm, err := poseidon.Hash(hmInput) // hm = H1(8*R.x, 8*R.y, A.x, A.y, msg)
hmInput := [poseidon.T]*big.Int{R8.X, R8.Y, A.X, A.Y, msg, big.NewInt(int64(0))}
hm, err := poseidon.PoseidonHash(hmInput) // hm = H1(8*R.x, 8*R.y, A.x, A.y, msg)
if err != nil {
panic(err)
}
@@ -238,8 +238,8 @@ func (k *PrivateKey) SignPoseidon(msg *big.Int) *Signature {
// VerifyPoseidon verifies the signature of a message encoded as a big.Int in Zq
// using blake-512 hash for buffer hashing and Poseidon for big.Int hashing.
func (p *PublicKey) VerifyPoseidon(msg *big.Int, sig *Signature) bool {
hmInput := []*big.Int{sig.R8.X, sig.R8.Y, p.X, p.Y, msg}
hm, err := poseidon.Hash(hmInput) // hm = H1(8*R.x, 8*R.y, A.x, A.y, msg)
hmInput := [poseidon.T]*big.Int{sig.R8.X, sig.R8.Y, p.X, p.Y, msg, big.NewInt(int64(0))}
hm, err := poseidon.PoseidonHash(hmInput) // hm = H1(8*R.x, 8*R.y, A.x, A.y, msg)
if err != nil {
panic(err)
}