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Add test that breaks poseidon due to a security issue

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Eduard S
2019-12-16 16:48:38 +01:00
parent 53b9050d0a
commit 27ec5b26df
2 changed files with 14 additions and 4 deletions
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8
poseidon/poseidon.go
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@@ -168,15 +168,15 @@ func Hash(arr []*big.Int) (*big.Int, error) {
r := constants.fqR.Zero()
for i := 0; i < len(arr); i = i + 5 {
var fiveElems []*big.Int
var fiveElems [5]*big.Int
for j := 0; j < 5; j++ {
if i+j < len(arr) {
fiveElems = append(fiveElems, arr[i+j])
fiveElems[j] = arr[i+j]
} else {
fiveElems = append(fiveElems, big.NewInt(int64(0)))
fiveElems[j] = _constants.Zero
}
}
ph, err := PoseidonHash(fiveElems)
ph, err := PoseidonHash(fiveElems[:])
if err != nil {
return nil, err
}