Backup and restore vpn keys

src/freedombone-app-vpn

 }
 
 function backup_local_vpn {
-    echo -n ''
+    for d in /home/*/ ; do
+        USERNAME=$(echo "$d" | awk -F '/' '{print $3}')
+        if [ -f /home/$USERNAME/$OPENVPN_KEY_FILENAME ]; then
+            cp /home/$USERNAME/$OPENVPN_KEY_FILENAME /etc/openvpn/easy-rsa/keys/${USERNAME}_${OPENVPN_KEY_FILENAME}
+        fi
+    done
+
+    function_check backup_directory_to_usb
+    backup_directory_to_usb /etc/openvpn/easy-rsa/keys vpn
 }
 
 function restore_local_vpn {
-    echo -n ''
+    temp_restore_dir=/root/tempvpn
+    restore_directory_from_usb $temp_restore_dir vpn
+    if [ -d ${temp_restore_dir} ]; then
+        cp -r ${temp_restore_dir}/* /etc/openvpn/easy-rsa/keys
+        rm -rf ${temp_restore_dir}
+
+        for d in /home/*/ ; do
+            USERNAME=$(echo "$d" | awk -F '/' '{print $3}')
+            if [ -f /etc/openvpn/easy-rsa/keys/${USERNAME}_${OPENVPN_KEY_FILENAME} ]; then
+                cp /etc/openvpn/easy-rsa/keys/${USERNAME}_${OPENVPN_KEY_FILENAME} /home/$USERNAME/$OPENVPN_KEY_FILENAME
+                chown $USERNAME:$USERNAME /home/$USERNAME/$OPENVPN_KEY_FILENAME
+            fi
+        done
+    fi
 }
 
 function backup_remote_vpn {
-    echo -n ''
+    for d in /home/*/ ; do
+        USERNAME=$(echo "$d" | awk -F '/' '{print $3}')
+        if [ -f /home/$USERNAME/$OPENVPN_KEY_FILENAME ]; then
+            cp /home/$USERNAME/$OPENVPN_KEY_FILENAME /etc/openvpn/easy-rsa/keys/${USERNAME}_${OPENVPN_KEY_FILENAME}
+        fi
+    done
+
+    function_check backup_directory_to_friend
+    backup_directory_to_friend /etc/openvpn/easy-rsa/keys vpn
 }
 
 function restore_remote_vpn {
-    echo -n ''
+    temp_restore_dir=/root/tempvpn
+    restore_directory_from_friend $temp_restore_dir vpn
+    if [ -d ${temp_restore_dir} ]; then
+        cp -r ${temp_restore_dir}/* /etc/openvpn/easy-rsa/keys
+        rm -rf ${temp_restore_dir}
+
+        for d in /home/*/ ; do
+            USERNAME=$(echo "$d" | awk -F '/' '{print $3}')
+            if [ -f /etc/openvpn/easy-rsa/keys/${USERNAME}_${OPENVPN_KEY_FILENAME} ]; then
+                cp /etc/openvpn/easy-rsa/keys/${USERNAME}_${OPENVPN_KEY_FILENAME} /home/$USERNAME/$OPENVPN_KEY_FILENAME
+                chown $USERNAME:$USERNAME /home/$USERNAME/$OPENVPN_KEY_FILENAME
+            fi
+        done
+    fi
 }
 
 function remove_vpn {