AmneziaWG v1.5 (#84)

device/junk_creator.go

@@ -1,69 +0,0 @@
-package device
-
-import (
-	"bytes"
-	crand "crypto/rand"
-	"fmt"
-	v2 "math/rand/v2"
-)
-
-type junkCreator struct {
-	device   *Device
-	cha8Rand *v2.ChaCha8
-}
-
-func NewJunkCreator(d *Device) (junkCreator, error) {
-	buf := make([]byte, 32)
-	_, err := crand.Read(buf)
-	if err != nil {
-		return junkCreator{}, err
-	}
-	return junkCreator{device: d, cha8Rand: v2.NewChaCha8([32]byte(buf))}, nil
-}
-
-// Should be called with aSecMux RLocked
-func (jc *junkCreator) createJunkPackets() ([][]byte, error) {
-	if jc.device.aSecCfg.junkPacketCount == 0 {
-		return nil, nil
-	}
-
-	junks := make([][]byte, 0, jc.device.aSecCfg.junkPacketCount)
-	for i := 0; i < jc.device.aSecCfg.junkPacketCount; i++ {
-		packetSize := jc.randomPacketSize()
-		junk, err := jc.randomJunkWithSize(packetSize)
-		if err != nil {
-			return nil, fmt.Errorf("Failed to create junk packet: %v", err)
-		}
-		junks = append(junks, junk)
-	}
-	return junks, nil
-}
-
-// Should be called with aSecMux RLocked
-func (jc *junkCreator) randomPacketSize() int {
-	return int(
-		jc.cha8Rand.Uint64()%uint64(
-			jc.device.aSecCfg.junkPacketMaxSize-jc.device.aSecCfg.junkPacketMinSize,
-		),
-	) + jc.device.aSecCfg.junkPacketMinSize
-}
-
-// Should be called with aSecMux RLocked
-func (jc *junkCreator) appendJunk(writer *bytes.Buffer, size int) error {
-	headerJunk, err := jc.randomJunkWithSize(size)
-	if err != nil {
-		return fmt.Errorf("failed to create header junk: %v", err)
-	}
-	_, err = writer.Write(headerJunk)
-	if err != nil {
-		return fmt.Errorf("failed to write header junk: %v", err)
-	}
-	return nil
-}
-
-// Should be called with aSecMux RLocked
-func (jc *junkCreator) randomJunkWithSize(size int) ([]byte, error) {
-	junk := make([]byte, size)
-	_, err := jc.cha8Rand.Read(junk)
-	return junk, err
-}