Implemented authentication.

Near feature complete.

APDU.hpp

@@ -1,8 +1,18 @@
 #pragma once
 
-enum APDU
+enum APDU : uint8_t
 {
 	U2F_REG  = 0x01,
 	U2F_AUTH = 0x02,
 	U2F_VER  = 0x03
 };
+
+enum APDU_STATUS : uint16_t
+{
+	SW_NO_ERROR = 0x9000,
+	SW_CONDITIONS_NOT_SATISFIED = 0x6985,
+	SW_WRONG_DATA = 0x6A80,
+	SW_WRONG_LENGTH = 0x6700,
+	SW_CLA_NOT_SUPPORTED = 0x6E00,
+	SW_INS_NOT_SUPPORTED = 0x6D00
+};