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poseidon consistent use of T

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arnaucube
2019-12-17 18:15:22 +01:00
parent fcb586591a
commit c754d01ce0
1 changed files with 5 additions and 5 deletions
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10
poseidon/poseidon.go
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@@ -101,7 +101,7 @@ func checkAllDifferent(v []*big.Int) bool {
// ark computes Add-Round Key, from the paper https://eprint.iacr.org/2019/458.pdf // ark computes Add-Round Key, from the paper https://eprint.iacr.org/2019/458.pdf
func ark(state []*big.Int, c *big.Int) []*big.Int { func ark(state []*big.Int, c *big.Int) []*big.Int {
for i := 0; i < len(state); i++ { for i := 0; i < T; i++ {
state[i] = constants.fqR.Add(state[i], c) state[i] = constants.fqR.Add(state[i], c)
} }
return state return state
@@ -167,16 +167,16 @@ func Hash(arr []*big.Int) (*big.Int, error) {
} }
r := constants.fqR.Zero() r := constants.fqR.Zero()
for i := 0; i < len(arr); i = i + 5 { for i := 0; i < len(arr); i = i + T - 1 {
var toHash [6]*big.Int var toHash [T]*big.Int
for j := 0; j < 5; j++ { for j := 0; j < T-1; j++ {
if i+j < len(arr) { if i+j < len(arr) {
toHash[j] = arr[i+j] toHash[j] = arr[i+j]
} else { } else {
toHash[j] = _constants.Zero toHash[j] = _constants.Zero
} }
} }
toHash[5] = r toHash[T-1] = r
ph, err := PoseidonHash(toHash[:]) ph, err := PoseidonHash(toHash[:])
if err != nil { if err != nil {
return nil, err return nil, err