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Use copy into fixed arrays to satisfy gosec bounds checking

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This commit is contained in:
Viktor Liu
2026-03-19 13:55:32 +01:00
parent cd7290a497
commit 67fb6be40a
1 changed files with 6 additions and 6 deletions
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12
shared/netiputil/compact.go
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@@ -24,14 +24,14 @@ func EncodePrefix(p netip.Prefix) []byte {
func DecodePrefix(b []byte) (netip.Prefix, error) {
switch len(b) {
case 5:
ip4 := [4]byte(b[:4])
addr := netip.AddrFrom4(ip4)
return netip.PrefixFrom(addr, int(b[4])), nil
var ip4 [4]byte
copy(ip4[:], b)
return netip.PrefixFrom(netip.AddrFrom4(ip4), int(b[len(b)-1])), nil
case 17:
ip6 := [16]byte(b[:16])
var ip6 [16]byte
copy(ip6[:], b)
addr := netip.AddrFrom16(ip6).Unmap()
bits := int(b[16])
// Clamp prefix length when unmapping v4-mapped v6 to v4
bits := int(b[len(b)-1])
if addr.Is4() && bits > 32 {
bits = 32
}