+ 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( uint8_t *string, uint8_t type, int length);
+void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length);
+
+void xor(unsigned char *dst, unsigned char *src, size_t len);
+int32_t le24toh(uint8_t data[3]);
+uint32_t le32toh (uint8_t *data);
+void rol(uint8_t *data, const size_t len);