chore: address gosec lints

Author: PhotonQuantum

core/state.go

@@ -30,12 +30,12 @@ func hashIPBlock(ip ipblock.IPBlock) uint32 {
 	binary.BigEndian.PutUint64(buf[:], data)
 
 	hash := xxh3.Hash(buf[:])
-	return uint32(hash) // #nosec G115 -- expected truncation
+	return uint32(hash & 0xffffffff)
 }
 
 func hashUUID(id uuid.UUID) uint32 {
 	hash := xxh3.Hash(id[:])
-	return uint32(hash) // #nosec G115 -- expected truncation
+	return uint32(hash & 0xffffffff)
 }
 
 type InstanceState struct {

internal/expiremap/expiremap.go

@@ -28,7 +28,7 @@ type ExpireMap[K comparable, V any] struct {
 // fastModulo calculates x % n without using the modulo operator (~4x faster).
 // Reference: https://lemire.me/blog/2016/06/27/a-fast-alternative-to-the-modulo-reduction/
 func fastModulo(x, n uint32) uint32 {
-	return uint32((uint64(x) * uint64(n)) >> 32) //nolint:gosec
+	return uint32((uint64(x) * uint64(n)) >> 32)
 }
 
 func NewExpireMap[K comparable, V any](hash func(K) uint32) *ExpireMap[K, V] {

internal/ipblock/ipblock.go

@@ -77,7 +77,7 @@ func (b IPBlock) ToIPNet(cfg Config) *net.IPNet {
 
 	ip := make(net.IP, 16)
 	for i := range 8 {
-		ip[7-i] = byte(b.data >> (8 * i))
+		ip[7-i] = byte((b.data >> (8 * i)) & 0xff)
 	}
 	return &net.IPNet{
 		IP:   ip,