Fix G404 gosec lint error

model/share.go

@@ -42,7 +42,7 @@ func (s Share) CoverArtID() ArtworkID {
 	case "artist":
 		return Artist{ID: ids[0]}.CoverArtID()
 	}
-	rnd := random.Int64(len(s.Tracks))
+	rnd := random.Int64N(len(s.Tracks))
 	return s.Tracks[rnd].CoverArtID()
 }
 

server/backgrounds/handler.go

@@ -51,7 +51,7 @@ func (h *Handler) getRandomImage(ctx context.Context) (string, error) {
 	if len(list) == 0 {
 		return "", errors.New("no images available")
 	}
-	rnd := random.Int64(len(list))
+	rnd := random.Int64N(len(list))
 	return list[rnd], nil
 }
 

utils/hasher/hasher.go

@@ -2,8 +2,9 @@ package hasher
 
 import (
 	"hash/maphash"
-	"math/rand/v2"
 	"strconv"
+
+	"github.com/navidrome/navidrome/utils/random"
 )
 
 var instance = NewHasher()
@@ -43,7 +44,7 @@ func (h *Hasher) Reseed(id string) {
 }
 
 func (h *Hasher) reseed(id string) string {
-	seed := strconv.FormatUint(rand.Uint64(), 36)
+	seed := strconv.FormatUint(random.Uint64(), 36)
 	h.seeds[id] = seed
 	return seed
 }

utils/random/number.go

@@ -2,12 +2,23 @@ package random
 
 import (
 	"crypto/rand"
+	"encoding/binary"
 	"math/big"
 
 	"golang.org/x/exp/constraints"
 )
 
-func Int64[T constraints.Integer](max T) int64 {
+// Int64N returns a random int64 between 0 and max.
+// This is a reimplementation of math/rand/v2.Int64N using a cryptographically secure random number generator.
+func Int64N[T constraints.Integer](max T) int64 {
 	rnd, _ := rand.Int(rand.Reader, big.NewInt(int64(max)))
 	return rnd.Int64()
 }
+
+// Uint64 returns a random uint64.
+// This is a reimplementation of math/rand/v2.Uint64 using a cryptographically secure random number generator.
+func Uint64() uint64 {
+	buffer := make([]byte, 8)
+	_, _ = rand.Read(buffer)
+	return binary.BigEndian.Uint64(buffer)
+}

utils/random/number_test.go

@@ -14,10 +14,10 @@ func TestRandom(t *testing.T) {
 }
 
 var _ = Describe("number package", func() {
-	Describe("Int64", func() {
+	Describe("Int64N", func() {
 		It("should return a random int64", func() {
 			for i := 0; i < 10000; i++ {
-				Expect(random.Int64(100)).To(BeNumerically("<", 100))
+				Expect(random.Int64N(100)).To(BeNumerically("<", 100))
 			}
 		})
 	})

utils/random/weighted_random_chooser.go

@@ -43,7 +43,7 @@ func (w *WeightedChooser[T]) weightedChoice() (int, error) {
 	if len(w.entries) == 0 {
 		return 0, errors.New("cannot choose from empty list")
 	}
-	rnd := Int64(w.totalWeight)
+	rnd := Int64N(w.totalWeight)
 	for i, weight := range w.weights {
 		rnd -= int64(weight)
 		if rnd < 0 {