+ int hextobinarray( char *target, char *source);
+ int hextobinstring( char *target, char *source);
+ int binarraytohex( char *target, char *source, int length);
+void binarraytobinstring(char *target, char *source, int length);
+uint8_t GetParity( char *string, uint8_t type, int length);
+void wiegand_add_parity(char *target, char *source, char length);
+
+void xor(unsigned char * dst, unsigned char * src, size_t len);
+int32_t le24toh (uint8_t data[3]);