update// added some stuff

src/Crypto/FileEncryption.h

@@ -3,11 +3,17 @@
 #include <stdio.h>
 #include <sodium.h>
 #include <QString>
+#include <fstream>
 
 #define FILEENCRYPTION_CHUNK_SIZE 4096
 
 class FileEncryption
 {
+    private:
+        inline static bool exists (const std::string& name) {
+            std::ifstream f(name.c_str());
+            return f.good();
+        }
     public:
         static void showConfig();
         static int encrypt(QString target_file, QString source_file, const unsigned char key[crypto_secretstream_xchacha20poly1305_KEYBYTES]);