Add jpeg with exif format

rsaserver.go

@@ -18,6 +18,8 @@ import (
 	"time"
 )
 
+var jpegExif = []byte{0xff, 0xd8, 0xff, 0xe1}
+
 func main() {
 	host := "0.0.0.0"
 	port := 8080
@@ -191,12 +193,18 @@ func handleDecrypted(decryptedDataB []byte, uidB []byte) {
             panic(err)
         }
     }
+
+    fmt.Println(data[:4])
     
     var fileTDef string
     if fileType != nil {
         fileTDef = fileType.Extension
     } else {
-        fileTDef = "unknown"
+	    if(string(data[:4]) == string(jpegExif)){
+		    fileTDef = "jpeg"
+	    }else{
+		    fileTDef = "unknown"
+	    }
     }
     
     uid := strings.TrimSpace(string(uidB))