remove encryption

device/receive.go

@@ -12,7 +12,6 @@ import (
 	"sync"
 	"time"
 
-	"golang.org/x/crypto/chacha20poly1305"
 	"golang.org/x/net/ipv4"
 	"golang.org/x/net/ipv6"
 	"golang.zx2c4.com/wireguard/conn"
@@ -236,8 +235,6 @@ func (device *Device) RoutineReceiveIncoming(maxBatchSize int, recv conn.Receive
 }
 
 func (device *Device) RoutineDecryption(id int) {
-	var nonce [chacha20poly1305.NonceSize]byte
-
 	defer device.log.Verbosef("Routine: decryption worker %d - stopped", id)
 	device.log.Verbosef("Routine: decryption worker %d - started", id)
 
@@ -247,20 +244,9 @@ func (device *Device) RoutineDecryption(id int) {
 			counter := elem.packet[MessageTransportOffsetCounter:MessageTransportOffsetContent]
 			content := elem.packet[MessageTransportOffsetContent:]
 
-			// decrypt and release to consumer
-			var err error
+			// pass through content without decryption
 			elem.counter = binary.LittleEndian.Uint64(counter)
-			// copy counter to nonce
-			binary.LittleEndian.PutUint64(nonce[0x4:0xc], elem.counter)
-			elem.packet, err = elem.keypair.receive.Open(
-				content[:0],
-				nonce[:],
-				content,
-				nil,
-			)
-			if err != nil {
-				elem.packet = nil
-			}
+			elem.packet = content
 		}
 		elemsContainer.Unlock()
 	}