Do not share the XOR key offset between the send and receive threads

CHANGELOG.md

@@ -19,10 +19,16 @@ Line wrap the file at 100 chars.                                              Th
 * **Fixed**: for any bug fixes.
 * **Security**: in case of vulnerabilities.
 
+## [1.1.1] - 2024-09-06
+### Fixed
+- Do not share the XOR key offset between the send and receive threads.
+
+
 ## [1.1.0] - 2024-09-05
 ### Added
 - Add XOR v2.
 
+
 ## [1.0.4] - 2024-07-04
 ### Changed
 - Upgrade to use Go 1.22.5

proxy/xorv2/xorv2.go

@@ -9,9 +9,8 @@ import (
 )
 
 type xor struct {
-	addrPort     string
-	xorKey       []byte
-	xorKeyOffset int
+	addrPort string
+	xorKey   []byte
 }
 
 func New(ip net.IP) (*xor, error) {
@@ -33,6 +32,7 @@ func (x *xor) ToPeer(dst io.Writer, src io.Reader)   { x.forward(dst, src) }
 
 func (x *xor) forward(dst io.Writer, src io.Reader) {
 	buf := make([]byte, 1024*64)
+	offset := 0
 
 	for {
 		nr, err := src.Read(buf)
@@ -41,8 +41,8 @@ func (x *xor) forward(dst io.Writer, src io.Reader) {
 		}
 
 		for i := 0; i < nr; i++ {
-			buf[i] ^= x.xorKey[x.xorKeyOffset]
-			x.xorKeyOffset = (x.xorKeyOffset + 1) % len(x.xorKey)
+			buf[i] ^= x.xorKey[offset]
+			offset = (offset + 1) % len(x.xorKey)
 		}
 
 		nw, err := dst.Write(buf[0:nr])