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fix length check per-kind bug

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This commit is contained in:
Fabio Bozzo
2024-09-16 14:04:01 +02:00
parent ad03154b6e
commit 7376256672
1 changed files with 8 additions and 5 deletions
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13
capability/policy/selector/selector.go
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@@ -263,21 +263,24 @@ func resolve(sel Selector, subject ipld.Node, at []string) (ipld.Node, []ipld.No
} }
} else { } else {
slice := seg.Slice() slice := seg.Slice()
var start, end int64 var start, end, length int64
switch cur.Kind() { switch cur.Kind() {
case datamodel.Kind_List: case datamodel.Kind_List:
start, end = resolveSliceIndices(slice, cur.Length()) length = cur.Length()
start, end = resolveSliceIndices(slice, length)
case datamodel.Kind_Bytes: case datamodel.Kind_Bytes:
b, _ := cur.AsBytes() b, _ := cur.AsBytes()
start, end = resolveSliceIndices(slice, int64(len(b))) length = int64(len(b))
start, end = resolveSliceIndices(slice, length)
case datamodel.Kind_String: case datamodel.Kind_String:
str, _ := cur.AsString() str, _ := cur.AsString()
start, end = resolveSliceIndices(slice, int64(len(str))) length = int64(len(str))
start, end = resolveSliceIndices(slice, length)
default: default:
return nil, nil, newResolutionError(fmt.Sprintf("can not slice on kind: %s", kindString(cur)), at) return nil, nil, newResolutionError(fmt.Sprintf("can not slice on kind: %s", kindString(cur)), at)
} }
if start < 0 || end < start { if start < 0 || end < start || end > length {
if seg.Optional() { if seg.Optional() {
cur = nil cur = nil
} else { } else {