Add desfire reading

inc/crc32.h

@@ -0,0 +1,8 @@
+#ifndef CRC32_H_I5S4G2OH
+#define CRC32_H_I5S4G2OH
+
+#include <stdint.h>
+
+uint32_t crc32(uint8_t *buffer, uint16_t len);
+
+#endif /* end of include guard: CRC32_H_I5S4G2OH */

inc/crc8.h

@@ -0,0 +1,6 @@
+#ifndef CRC8_H_2PZB4QST
+#define CRC8_H_2PZB4QST
+
+unsigned char crc8(const unsigned char * data, const unsigned int size);
+
+#endif /* end of include guard: CRC8_H_2PZB4QST */