def test_high8(self):
"""
testo l'operazione high8
"""
a = 0xAABB
processed = high8(a)
expected = 0xAA
self.assertEqual(expected, processed)
def S(index): ''' ritorna SBox(index) ''' i0 = low8(index) i1 = high8(index) firstEl = getValueFromSbox(0,i0) secondEl = getValueFromSbox(1,i1) return firstEl ^ secondEl
def getWEPSeed(self): ''' calcola il WEPSeed da ttak,tk e tsc. L'algoritmo è descritto a pagina 178 della rfc wepSeed è una tupla ''' # prendo i valori di input separati in byte tk0,tk1,tk2,tk3,tk4,tk5,tk6,tk7,tk8,tk9,tk10,tk11,tk12,tk13,tk14,tk15 = self.attributeSplitter.getSplittedTK() tk_tuple = (tk0,tk1,tk2,tk3,tk4,tk5,tk6,tk7,tk8,tk9,tk10,tk11,tk12,tk13,tk14,tk15) tsc0,tsc1,tsc2,tsc3,tsc4,tsc5 = self.attributeSplitter.getSplittedTSC() # ttak è già una tupla e quindi non dev'essere splittato '''step_1''' ppk0 = self.ttak[0] ppk1 = self.ttak[1] ppk2 = self.ttak[2] ppk3 = self.ttak[3] ppk4 = self.ttak[4] ppk5 = (self.ttak[4] + mk16(tsc1,tsc0)) & 0xffff '''step_2''' ppk0 = (ppk0 + S(ppk5 ^ mk16(tk1,tk0))) & 0xffff ppk1 = (ppk1 + S(ppk0 ^ mk16(tk3,tk2))) & 0xffff ppk2 = (ppk2 + S(ppk1 ^ mk16(tk5,tk4))) & 0xffff ppk3 = (ppk3 + S(ppk2 ^ mk16(tk7,tk6))) & 0xffff ppk4 = (ppk4 + S(ppk3 ^ mk16(tk9,tk8))) & 0xffff ppk5 = (ppk5 + S(ppk4 ^ mk16(tk11,tk10))) & 0xffff ppk0 = (ppk0 + self.rotR1(ppk5 ^ mk16(tk13,tk12))) & 0xffff ppk1 = (ppk1 + self.rotR1(ppk0 ^ mk16(tk15,tk14))) & 0xffff ppk2 = (ppk2 + self.rotR1(ppk1)) & 0xffff ppk3 = (ppk3 + self.rotR1(ppk2)) & 0xffff ppk4 = (ppk4 + self.rotR1(ppk3)) & 0xffff ppk5 = (ppk5 + self.rotR1(ppk4)) & 0xffff ppk_tuple = (ppk0,ppk1,ppk2,ppk3,ppk4,ppk5) '''step3''' wepSeed=[] wepSeed.append(tsc1) wepSeed.append((tsc1 | 0x20) & 0x7F) wepSeed.append(tsc0) wepSeed.append(low8((ppk5 ^ mk16(tk1,tk0))>>1)) #wepSeed_tuple = (wepSeed0,wepSeed1,wepSeed2,wepSeed3,wepSeed4,wepSeed5) for i in range(6): wepSeed.append(low8(ppk_tuple[i])) wepSeed.append(high8(ppk_tuple[i])) return tuple(wepSeed)
