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fix: prevent an OOB

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This commit is contained in:
Guillaume Ballet 2021-12-21 21:29:38 +01:00
parent b49d312d41
commit 1e11b14c47
1 changed files with 7 additions and 4 deletions
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11
trie/utils/verkle.go
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@ -42,17 +42,20 @@ var (
)
func GetTreeKey(address []byte, treeIndex *uint256.Int, subIndex byte) []byte {
var poly []fr.Element
var poly [256]fr.Element
verkle.FromLEBytes(&poly[0], []byte{1})
verkle.FromLEBytes(&poly[0], []byte{2, 63})
verkle.FromLEBytes(&poly[1], address[:16])
verkle.FromLEBytes(&poly[2], address[16:])
verkle.FromLEBytes(&poly[3], treeIndex.Bytes()[:16])
verkle.FromLEBytes(&poly[4], treeIndex.Bytes()[16:])
var index [32]byte
copy(index[:], treeIndex.Bytes())
verkle.FromLEBytes(&poly[3], index[:16])
verkle.FromLEBytes(&poly[4], index[16:])
for i := 5; i < len(poly); i++ {
verkle.CopyFr(&poly[i], &verkle.FrZero)
}
ret := ipa.NewIPASettings().Commit(poly)
ret := ipa.NewIPASettings().Commit(poly[:])
retb := ret.Bytes()
return retb[:]