#include <stdint.h>

#define NUMROUNDS 32
extern uint8_t const Sbox[256];

void treyfer_encrypt(uint8_t text[8], uint8_t const key[8])
{
	unsigned i;
	uint8_t t = text[0];
	for (i = 0; i < 8*NUMROUNDS; i++) {
		t = Sbox[key[i%8]] + text[(i+1)%8];
		text[(i+1) % 8] = t = (t << 1) | (t >> 7);        /* Rotate left 1 bit */
	}
}