NitrokeyManager: Also return serial number as u32

This patch adds the get_serial_number_as_u32 method to NitrokeyManager.
It returns the serial number as a 32-bit unsigned integer.  Previously,
we only returned it as a string generated from the integer value,
get_serial_number.

While get_serial_number returns an empty string if no device is
connected and "NA" if an unknown model is connected, the new method
throws a DeviceNotConnected exception in the first case and returns zero
in the second case as we cannot express the three states in one integer
return value.

1 files changed, 1 insertions, 0 deletions

diff --git a/libnitrokey/NitrokeyManager.h b/libnitrokey/NitrokeyManager.h
index 33ede1b..163a799 100644
--- a/libnitrokey/NitrokeyManager.h
+++ b/libnitrokey/NitrokeyManager.h
@@ -104,6 +104,7 @@ char * strndup(const char* str, size_t maxlen);
         stick10::GetStatus::ResponsePayload get_status();
         string get_status_as_string();
         string get_serial_number();
+        uint32_t get_serial_number_as_u32();
 
         char * get_totp_slot_name(uint8_t slot_number);
         char * get_hotp_slot_name(uint8_t slot_number);