def gfunc(w, keyyielder):
g1 = c.getbyteAt(w, 1)
g2 = c.getbyteAt(w, 0)
g3 = c.fvalue(g2 ^ keyyielder()) ^ g1
g4 = c.fvalue(g3 ^ keyyielder()) ^ g2
g5 = c.fvalue(g4 ^ keyyielder()) ^ g3
g6 = c.fvalue(g5 ^ keyyielder()) ^ g4
return c.concat(g5, g6)
def generateSubkeys(k):
arr = []
for rnd in range(c.numround):
for x in range(12):
k = c.rol(k, c.keylen * 8)
arr.append(c.getbyteAt(k, ((4 * rnd) + (x % 4)) % c.keylen))
return arr
def generateSubkeys(k):
arr = [0 for x in range(12 * c.numround)]
i = 0
for rnd in range(c.numround - 1, -1, -1):
for x in range(11, -1, -1):
arr[i * 12 + x] = c.getbyteAt(k, ((4 * rnd) + (x % 4)) % c.keylen)
k = c.ror(k, c.keylen * 8)
i += 1
return arr
def __encrypt__(p, k, keyyielder):
w = c.whitening(p, k)
arr = [
c.getbyteAt(w, 3, 2),
c.getbyteAt(w, 2, 2),
c.getbyteAt(w, 1, 2),
c.getbyteAt(w, 0, 2)
]
for rnd in range(c.numround):
arr = roundfunc(arr, keyyielder)
y = c.concat(c.concat(arr[2], arr[3], 2), c.concat(arr[0], arr[1], 2), 4)
ci = c.whitening(y, k)
return [
c.getbyteAt(ci, 3, 2),
c.getbyteAt(ci, 2, 2),
c.getbyteAt(ci, 1, 2),
c.getbyteAt(ci, 0, 2)
]