+void xor(unsigned char * dst, unsigned char * src, size_t len);
+int32_t le24toh (uint8_t data[3]);
+uint32_t le32toh (uint8_t *data);
+uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits);
+void rol(uint8_t *data, const size_t len);
+uint32_t SwapBits(uint32_t value, int nrbits);
\ No newline at end of file