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key_test.py
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Sun, May 5, 21:40

key_test.py
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def sched_norm(k, r):
# rotate k0 >> 12
for i in range(r):
k0 = k[112:128]
k0 = k0[4:16] + k0[0:4]
# rotate k1 >> 2
k1 = k[96:112]
k1 = k1[14:16] + k1[0:14]
# rotate k >> 32
k = k1 + k0 + k[0:96]
print(frombin(''.join(k), False))
return k
def ext_norm(k):
ki = ['0'] * 64
for i in range(32):
ki[2*i] = k[32+i]
ki[2*i+1] = k[96+i]
return ki
def ext_slice(k, even):
ki = ['0'] * 64
for i in range(32):
if even:
ki[2*i] = k[1+4*i]
ki[2*i+1] = k[2+4*i]
else:
ki[2*i] = k[3+4*i]
ki[2*i+1] = k[(4+4*i) % 128]
return ki
def sched_slice(k, rr):
x = k[:]
for r in range(rr):
for i in range(128):
if r % 4 == 0:
# reversal (part 2)
if i == 0 and r > 0:
x = swap(x, 0, 127)
# k1 << 2
if i >= 11 and i <= 63 and i % 4 == 3:
x = swap(x, 119, 127)
if r != 0:
# k7 <<< 8
if i >= 3 and i <= 31 and i % 4 == 3:
x = swap(x, 0, 32)
# k7 << 4
if i >= 20 and i <= 64 and i % 4 == 0:
x = swap(x, 111, 127)
# k6 << 4 (part 1)
if i >= 84 and i <= 128 and i % 4 == 0:
x = swap(x, 111, 127)
elif r % 4 == 1:
# k6 << 4 (part 2)
if r != 1:
if i == 0:
x = swap(x, 111, 127)
# k3 << 2
if i >= 13 and i <= 65 and i % 4 == 1:
x = swap(x, 119, 127)
# k1 <<< 8
if i >= 2 and i <= 30 and i % 4 == 2:
x = swap(x, 0, 32)
# k1 << 4
if i >= 19 and i <= 63 and i % 4 == 3:
x = swap(x, 111, 127)
# k0 << 4
if i >= 83 and i <= 127 and i % 4 == 3:
x = swap(x, 111, 127)
if r % 4 == 2:
# reversals
if i % 4 == 0:
x = swap(x, 1, 2)
if i % 4 == 2:
x = swap(x, 0, 127)
# k5 << 2
if i >= 10 and i <= 62 and i % 4 == 2:
x = swap(x, 119, 127)
# k3 << 8
if i >= 4 and i <= 32 and i % 4 == 0:
x = swap(x, 0, 32)
# k3 << 4
if i >= 21 and i <= 65 and i % 4 == 1:
x = swap(x, 111, 127)
# k2 << 4 (part 1)
if i >= 85 and i <= 128 and i % 4 == 1:
x = swap(x, 111, 127)
if r % 4 == 3:
# reversals (part 1)
if i % 4 == 0:
x = swap(x, 3, 4)
if i % 4 == 0 and i > 0:
x = swap(x, 0, 127)
# k2 << 4 (part 2)
if i == 1:
x = swap(x, 111, 127)
# k7 << 2
if i >= 12 and i <= 64 and i % 4 == 0:
x = swap(x, 119, 127)
# k5 << 8
if i >= 1 and i <= 29 and i % 4 == 1:
x = swap(x, 0, 32)
# k5 << 4
if i >= 18 and i <= 62 and i % 4 == 2:
x = swap(x, 111, 127)
# k4 << 4
if i >= 82 and i <= 128 and i % 4 == 2:
x = swap(x, 111, 127)
x = rotate_left(x)
return x
def slice_order(k):
ki = ['0'] * 128
for i in range(0, 16):
ki[1+4*i] = k[32+i] # k5
ki[2+4*i] = k[96+i] # k1
ki[3+4*i] = k[0+i] # k7
ki[4+4*i] = k[64+i] # k3
ki[64+1+4*i] = k[48+i] # k4
ki[64+2+4*i] = k[112+i] # k0
ki[64+3+4*i] = k[16+i] # k6
ki[(64+4+4*i) % 128] = k[80+i] # k2
return ki
def slice_order_inv(k):
ki = ['0'] * 128
for i in range(0, 16):
ki[32+i] = k[1+4*i] # k5
ki[96+i] = k[2+4*i] # k1
ki[0+i] = k[3+4*i] # k7
ki[64+i] = k[4+4*i] # k3
ki[48+i] = k[64+1+4*i] # k4
ki[112+i] = k[64+2+4*i] # k0
ki[16+i] = k[64+3+4*i] # k6
ki[80+i] = k[(64+4+4*i) % 128] # k2
return ki
def rotate_left(x):
return x[1:] + [x[0]]
def swap(x, i, j):
tmp = x[i]
x[i] = x[j]
x[j] = tmp
return x
def tobin(x, k):
if k:
return '{0:064b}'.format(x)
else:
return '{0:0128b}'.format(x)
def frombin(x, k):
if k:
return '{0:016X}'.format(int(x, 2))
else:
return '{0:032X}'.format(int(x, 2))
# k = [i for i in range(128)]
# x = 0x000102030405060708090A0B0C0D0E0F
x = 0x0123456789ABCDEFFEDCBA9876543210
k = list('{0:0128b}'.format(x))
kt = ext_norm(k)
kt1 = ext_slice(slice_order(k), True)
print(frombin(''.join(kt), True))
print(frombin(''.join(kt1), True))
k1 = sched_norm(k, 9)
k1e = ext_norm(k1)
print(frombin(''.join(k1e), True))
k11 = sched_slice(slice_order(k), 10)
k11e = ext_slice(k11, False)
print(frombin(''.join(k11e), True))

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