增加防探测功能,增加流量加密功能

shadow/rand.go

@@ -0,0 +1,49 @@
+package shadow
+
+import (
+	"bytes"
+	"crypto/md5"
+	"io"
+	"math/rand"
+)
+
+type RandReader struct {
+	io.Reader
+}
+
+func (r RandReader) Read(p []byte) (n int, err error) {
+	buf := make([]byte, 32)
+	randBytes := md5.Sum(RandomByte(16))
+	copy(buf[0:], randBytes[:])
+
+	preHashData := bytes.NewBuffer(randBytes[:])
+	sum := md5.Sum([]byte(HandshakePassword))
+	preHashData.Write(sum[:])
+	hash := md5.Sum(preHashData.Bytes())
+	copy(buf[16:], hash[:])
+	copy(p, buf)
+	return 32, nil
+}
+
+func RandomByte(size int) []byte {
+	buf := make([]byte, size)
+	for i := 0; i < size; i++ {
+		buf[i] = byte(rand.Intn(255))
+	}
+	return buf
+}
+
+func VerifyKey(p []byte, key string) bool {
+	if len(p) != 32 {
+		return false
+	}
+	buf := make([]byte, 16)
+	copy(buf, p[0:16])
+	buffer := bytes.NewBuffer(buf)
+	sum := md5.Sum([]byte(key))
+	buffer.Write(sum[:])
+
+	hash := md5.Sum(buffer.Bytes())
+
+	return bytes.Equal(hash[:], p[16:])
+}