PerKEY 57 49 41 33 25 17 58 50 42 34 26 18 10 59 51 43 35 27 19 11 60

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PerKEY = [57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36,
63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4]
PerKEY_with_compress = [14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10, 23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2,
41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48, 44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32]
Per_with_extension = [32, 1, 2, 3, 4, 5, 4, 5, 6, 7, 8, 9, 8, 9, 10, 11, 12, 13, 12, 13, 14, 15, 16, 17, 16, 17, 18,
19, 20, 21, 20, 21, 22, 23, 24, 25, 24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32, 1]
Per_simple = [16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10, 2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6,
22, 11, 4, 25]
Per_IP = [58,50,42,34,26,18,10,2,60,52,44,36,28,20,12,4,62,54,46,38,30, 22,14,6,64, 56,48,40,32,24,16,8,57,49,
41, 33,25,17,9,1,59,51,43, 35,27,19,11,3,61,53,45,37,29, 21, 13,5,63,55,47, 39,31,23,15,7]
Rev_Per_IP = [40,8,48,16,56,24,64,32,39, 7,47,15,55,23,63,31,38,6,46,14,54,22,62,30,37,5, 45,13,53,21,61,29,36,4,
44,12, 52,20,60,28,35,3,43,11,51,19, 59,27,34,2,42, 10,50,18, 58,26,33,1,41,9,49,17, 57,25]
S1 = [[14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7],
[0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8],
[4,1,14,8,13,6,2,11,15,12,9,7,3,10,50],
[15,12,8,2,4,9,1,7,5, 11,3,14,10,0,6,13]]
S2 = [[15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10],
[3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5],
[0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15],
[13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9]]
S3 = [[10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8],
[13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1],
[13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7],
[1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12]]
S4 = [[7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15],
[13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9],
[10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4],
[3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14]]
S5 = [[2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9],
[14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6],
[4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14],
[11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3]]
S6 = [[12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11],
[10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8],
[9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6],
[4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13]]
S7 = [[4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1],
[13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6],
[1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2],
[6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12]]
S8 = [[13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7],
[1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2],
[7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8],
[2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11]]
def permutation(obj, per):
res = ''
for i in per:
a = obj[i-1]
res += a
return res
def give_3_keys(keylist):
keystr = ''
for i in range(0, len(keylist)):
keypart = bin(keylist[i])[2:]
if len(keypart) <= 8:
keystr += str('0'*(8 - len(keypart))) + keypart
print keystr, 'key'
key_after_PerKEY = permutation(keystr, PerKEY)
k1_left = key_after_PerKEY[0:28]
k1_right = key_after_PerKEY[28:56]
k1_left_cyclic = k1_left[1:] + k1_left[0]
k1_right_cyclic = k1_right[1:] + k1_right[0]
k1 = k1_left_cyclic + k1_right_cyclic
key1 = permutation(k1, PerKEY_with_compress)
k2_left_cyclic = k1_left_cyclic[1:] + k1_left_cyclic[0]
k2_right_cyclic = k1_right_cyclic[1:] + k1_right_cyclic[0]
k2 = k2_left_cyclic + k2_right_cyclic
key2 = permutation(k2, PerKEY_with_compress)
k3_left_cyclic = k2_left_cyclic[2:] + k2_left_cyclic[0:2]
k3_right_cyclic = k2_right_cyclic[2:] + k2_right_cyclic[0:2]
k3 = k3_left_cyclic + k3_right_cyclic
key3 = permutation(k3, PerKEY_with_compress)
return key1, key2, key3
def cycle(XL, XR, keyn, last=0):
XR_after_Per_with_extension = permutation(XR, Per_with_extension)
xor_XR_with_key = int(XR_after_Per_with_extension, 2) ^ int(keyn, 2)
xor_with_key_bin = bin(xor_XR_with_key)[2:]
if len(xor_with_key_bin) <= 48:
xor_with_key_bin = str('0'*(48 - len(xor_with_key_bin))) + xor_with_key_bin
after_S_block = ''
start = 0
end = 6
for numb in range(1, 9):
part = xor_with_key_bin[start:end]
line = int((part[0] + part[5]), 2)
column = int((part[1:5]), 2)
if numb == 1:
res = S1[line][column]
elif numb == 2:
res = S2[line][column]
elif numb == 3:
res = S3[line][column]
elif numb == 4:
res = S4[line][column]
elif numb == 5:
res = S5[line][column]
elif numb == 6:
res = S6[line][column]
elif numb == 7:
res = S7[line][column]
elif numb == 8:
res = S8[line][column]
else:
break
res = bin(res)[2:]
if len(res) == 1:
res = '000' + res
elif len(res) == 2:
res = '00' + res
elif len(res) == 3:
res = '0' + res
after_S_block += res
start += 6
end += 6
F_xor_XL = ''
output_F = permutation(after_S_block, Per_simple)
output_F_xor_XL = int(output_F, 2) ^ int(XL, 2)
output_F_xor_XL_bin = bin(output_F_xor_XL)[2:]
if len(output_F_xor_XL_bin) <= 32:
F_xor_XL = '0'*(32 - len(output_F_xor_XL_bin)) + output_F_xor_XL_bin
if last == 0:
XL = XR
XR = F_xor_XL
else:
XL = F_xor_XL
XR = XR
return XL, XR
key = [36, 39, 51, 48, 43, 26, 34, 41]
text1 = [243, 44, 176, 61, 102, 58, 45, 206]
text2 = [200, 198, 46, 117, 71, 24, 151, 213]
text3 = [75, 246, 63, 251, 67, 140, 175, 246]
key1 = give_3_keys(key)[0]
key2 = give_3_keys(key)[1]
key3 = give_3_keys(key)[2]
textstr1 = ''
for i in text1:# потом text2, text3
keypart = bin(i)[2:]
if len(keypart) <= 8:
textstr1 += '0'*(8 - len(keypart)) + keypart
print textstr1, 'text1'
textstr1_after_initial_Per_IP = permutation(textstr1, Per_IP)
XL = textstr1_after_initial_Per_IP[0:32]
XR = textstr1_after_initial_Per_IP[32:]
XL1 = cycle(XL, XR, key3)[0]
XR1 = cycle(XL, XR, key3)[1]
XL2 = cycle(XL1, XR1, key2)[0]
XR2 = cycle(XL1, XR1, key2)[1]
XL3 = cycle(XL2, XR2, key1, 1)[0]
XR3 = cycle(XL2, XR2, key1, 1)[1]
XL_plus_XR = XL3 + XR3
mes_1_after_reverse_IP = permutation(XL_plus_XR, Rev_Per_IP)
print mes_1_after_reverse_IP
list = []
k = 0
for i in range(0, len(mes_1_after_reverse_IP)/8):
list.append(int(mes_1_after_reverse_IP[k: k+8], 2))
k += 8
print list