将XOR加密用C语言重写

benckmark.go

@@ -58,17 +58,17 @@ func randMillionSecond() time.Duration {
 
 func attack() {
 	c := make(chan int)
-	for i := 0; i < 10; i++ {
+	for i := 0; i < 20; i++ {
 		time.Sleep(time.Millisecond * randMillionSecond())
 		go doHttp(c)
 	}
-	for i := 0; i < 10; i++ {
+	for i := 0; i < 20; i++ {
 		<-c
 	}
 	log.Println("Finish")
 }
 
-func main1() {
+func main() {
 	cfg := profile.Config{
 		MemProfile:     true,
 		ProfilePath:    "./profile", // store profiles in current directory

main.go

@@ -25,11 +25,11 @@ func tunnel() {
 
 }
 
-func main() {
+func main1() {
 	// defer profile.Start(profile.CPUProfile).Stop()
 	flag.Parse()
 	fmt.Println("Hello World!")
-	log.LogTo(cli.LogTo, "ERROR")
+	log.LogTo(cli.LogTo, "INFO")
 	if cli.ProfilePort != 0 {
 		go func() {
 			http.ListenAndServe("0.0.0.0:"+strconv.Itoa(cli.ProfilePort), nil)

protocol/tunnel.go

@@ -75,17 +75,22 @@ func (this *Tunnel) Run() { //单向的，从src发送到dest
 	}()
 	cache := make([]byte, 1024*4) //4kB
 	//构建Carrier
-	revCarrier := tscipher.NewCarrier(src, tscipher.NewCipher("XOR"), cache, this.id)
+	revCarrier := tscipher.NewCarrier(src, tscipher.NewCipher("XOR"), cache, id)
-	sendCarrier := tscipher.NewCarrier(dest, tscipher.NewCipher("XOR"), cache, this.id)
+	sendCarrier := tscipher.NewCarrier(dest, tscipher.NewCipher("XOR"), cache, id)
+	//timer
+
 	for {
+		srTimer := time.Now() //send receive timer
 		var nByte int
 		var err error
+		rTimer := time.Now() //receive timer
 		if cipherDirection != RECEIVE {
 			revCarrier.Cipher = nil
 			nByte, err = tscipher.RowReceiveData(revCarrier)
 		} else {
 			nByte, err = tscipher.ReceiveData(revCarrier)
 		}
+		log.Info("id %s time to receive %d", id, time.Since(rTimer)/1000)
 		if err != nil {
 			log.Panic("Read panic. Tunnel id: %s. Remote Add: %s Local: %s. Err:%s", id, src.RemoteAddr().String(), src.LocalAddr().String(), err.Error())
 		}
@@ -93,11 +98,14 @@ func (this *Tunnel) Run() { //单向的，从src发送到dest
 		if cipherDirection != SEND {
 			sendCarrier.Cipher = nil
 		}
+		sTimer := time.Now() //send timer
 		n, err := tscipher.SendData(sendCarrier, nByte)
+		log.Info("id %s time to sned %d", id, time.Since(sTimer)/1000)
 		if err != nil {
 			log.Panic("Write panic. ID: %s, Err: %s, Remote Add: %s", id, err, dest.RemoteAddr().String())
 		}
 		log.Debug("Write %d bytes from %s to %s. Tunnel: %s . 18 bytes %x", n, dest.LocalAddr(), dest.RemoteAddr().String(), id, sendCarrier.Cache[:18])
+		log.Info("id %s send %d /receive %d duration %d ms", n, nByte, id, time.Since(srTimer)/1000)
 	}
 
 }

tscipher/xor.go

@@ -1,6 +1,24 @@
 package tscipher
 
-import ()
+/*
+#cgo CFLAGS: -O3
+#include <stdlib.h>
+char* decrypt(char* inBuff,char* buff,int buffLen,char* key,int keyLen){
+         for(int i=0;i<buffLen;i++){
+                 inBuff[i]=buff[buffLen-i-1]^key[i%keyLen];
+        }
+         return inBuff;
+ }
+ char* encrypt(char* inBuff,char* buff,int buffLen,char* key,int keyLen){
+         for(int i=0;i<buffLen;i++){
+                 inBuff[buffLen-i-1]=buff[i]^key[i%keyLen];
+        }
+         return inBuff;
+ }
+*/
+import "C"
+
+import "unsafe"
 
 type XOR struct {
 	key []byte
@@ -11,10 +29,12 @@ func (this *XOR) Decrypt(data []byte) (decrypted []byte, err error) {
 	// err = nil
 	// return
 	decrypted = make([]byte, len(data))
-	for i := 0; i < len(data); i++ {
+	// for i := 0; i < len(data); i++ {
-		decrypted[i] = data[len(data)-i-1] ^ this.key[i%len(this.key)]
+	// 	decrypted[i] = data[len(data)-i-1] ^ this.key[i%len(this.key)]
-		// decrypted[i] = data[i]
+	// 	// decrypted[i] = data[i]
-	}
+	// }
+	key := this.key
+	C.decrypt((*C.char)(unsafe.Pointer(&decrypted[0])), (*C.char)(unsafe.Pointer(&data[0])), C.int(len(data)), (*C.char)(unsafe.Pointer(&key[0])), C.int(len(key)))
 	err = nil
 	return
 }
@@ -24,10 +44,12 @@ func (this *XOR) Encrypt(data []byte) (encryped []byte, err error) {
 	// err = nil
 	// return
 	encryped = make([]byte, len(data))
-	for i := 0; i < len(data); i++ {
+	// for i := 0; i < len(data); i++ {
-		encryped[len(data)-i-1] = data[i] ^ this.key[i%len(this.key)]
+	// 	encryped[len(data)-i-1] = data[i] ^ this.key[i%len(this.key)]
-		// encryped[i] = data[i]
+	// 	// encryped[i] = data[i]
-	}
+	// }
+	key := this.key
+	C.encrypt((*C.char)(unsafe.Pointer(&encryped[0])), (*C.char)(unsafe.Pointer(&data[0])), C.int(len(data)), (*C.char)(unsafe.Pointer(&key[0])), C.int(len(key)))
 	err = nil
 	return
 }