Obfuscator interface in core & relay/proxy CLI support

pkg/obfs/xor.go

@@ -0,0 +1,20 @@
+package obfs
+
+type XORObfuscator []byte
+
+func (x XORObfuscator) Deobfuscate(buf []byte, n int) int {
+	l := len(x)
+	for i := range buf {
+		buf[i] ^= x[i%l]
+	}
+	return n
+}
+
+func (x XORObfuscator) Obfuscate(p []byte) []byte {
+	np := make([]byte, len(p))
+	l := len(x)
+	for i := range p {
+		np[i] = p[i] ^ x[i%l]
+	}
+	return np
+}