def __init__(self, b, nr, pi, c, t):
self.f = KeccakP(b, nr)
self.W = max(b/25, 8)
self.c = c
self.motorist = Motorist(self.f, pi, self.W, c, t)
self.T = Buffer()
self.SUV = None
class Keyak(object):
def __init__(self, b, nr, pi, c, t):
self.f = KeccakP(b, nr)
self.W = max(b/25, 8)
self.c = c
self.motorist = Motorist(self.f, pi, self.W, c, t)
self.T = Buffer()
self.SUV = None
def setSUV(self, key, nonce=None):
lk = self.W/8 *int(math.ceil((self.c + 9.0) / self.W))
self.SUV = KeyPack(key,lk)
if nonce is not None:
self.SUV.addNonce(nonce)
# conor code
def encrypt(self, data, metadata=''):
assert(self.SUV is not None)
self.motorist.startEngine(self.SUV, False, self.T, False, False)
I = Buffer(data)
O = Buffer()
A = Buffer(metadata)
self.motorist.wrap(I, O, A, self.T, False, False)
return O.data, self.T.data
def decrypt(self, data, tag, metadata=''):
assert(self.SUV is not None)
self.motorist.startEngine(self.SUV, False, self.T, True, False)
I = Buffer(data)
O = Buffer()
A = Buffer(metadata)
self.motorist.wrap(I, O, A, Buffer(tag), True, False)
if self.motorist.phase == motorist.Phase.Failed:
raise Exception('Authentication failed')
return O.data
