easybox.py

#!/usr/bin/env python

def keygen( mac ):
	bytes = [int(x, 16) for x in mac.split(':')]
	
	c1 = (bytes[-2] << 8) + bytes[-1]
	(s6, s7, s8, s9, s10) = [int(x) for x in '%05d' % (c1)]
	(m7, m8, m9, m10, m11, m12) = [int(x, 16) for x in mac.replace(':', '')[6:]]
	
	k1 = (s7 + s8 + m11 + m12) & (0x0F)
	k2 = (m9 + m10 + s9 + s10) & (0x0F)
	
	x1 = k1 ^ s10
	x2 = k1 ^ s9
	x3 = k1 ^ s8
	y1 = k2 ^ m10
	y2 = k2 ^ m11
	y3 = k2 ^ m12
	z1 = m11 ^ s10
	z2 = m12 ^ s9
	z3 = k1 ^ k2
	
	return "%X%X%X%X%X%X%X%X%X" % (x1, y1, z1, x2, y2, z2, x3, y3, z3)

mac = raw_input("MAC: ")
print( keygen(mac) )