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Update Poseidon last changes of the reference impl

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Update Poseidon to last changes of the reference implementation from
26ddaa91db

Compatible with update at circomlib
(cf853c1cc9)
This commit is contained in:
arnaucube
2021-03-08 14:57:57 +01:00
parent 58e589b6eb
commit 590573a0af
3 changed files with 14 additions and 16 deletions
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12
poseidon/poseidon.go
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@@ -47,7 +47,7 @@ func mix(state []*ff.Element, newState []*ff.Element, m [][]*ff.Element) {
for i := 0; i < len(state); i++ {
newState[i].SetUint64(0)
for j := 0; j < len(state); j++ {
mul.Mul(m[j][i], state[j])
mul.Mul(m[i][j], state[j])
newState[i].Add(newState[i], mul)
}
}
@@ -64,8 +64,8 @@ func Hash(inpBI []*big.Int) (*big.Int, error) {
}
inp := utils.BigIntArrayToElementArray(inpBI[:])
state := make([]*ff.Element, t)
copy(state[:], inp[:])
state[len(state)-1] = zero()
state[0] = zero()
copy(state[1:], inp[:])
nRoundsF := NROUNDSF
nRoundsP := NROUNDSP[t-2]
@@ -79,10 +79,8 @@ func Hash(inpBI []*big.Int) (*big.Int, error) {
for i := 0; i < nRoundsF+nRoundsP; i++ {
ark(state, c.c[t-2], i*t)
sbox(nRoundsF, nRoundsP, state, i)
if i < nRoundsF+nRoundsP-1 {
mix(state, newState, c.m[t-2])
state, newState = newState, state
}
mix(state, newState, c.m[t-2])
state, newState = newState, state
}
rE := state[0]
r := big.NewInt(0)