Created
December 22, 2019 12:23
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from z3 import * | |
x0 = BitVec('x0',8) | |
x1 = BitVec('x1',8) | |
x2 = BitVec('x2',8) | |
x3 = BitVec('x3',8) | |
x4 = BitVec('x4',8) | |
x5 = BitVec('x5',8) | |
x6 = BitVec('x6',8) | |
x7 = BitVec('x7',8) | |
x8 = BitVec('x8',8) | |
x9 = BitVec('x9',8) | |
x10 = BitVec('x10',8) # 10 | |
x11 = BitVec('x11',8) # 11 | |
x12 = BitVec('x12',8) # 12 | |
x13 = BitVec('x13',8) # 13 | |
x14 = BitVec('x14',8) #14 | |
x15 = BitVec('x15',8) #15 | |
s = Solver() | |
_vars = [x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15] | |
a = [115, 29, 32, 68, 106, 108, 89, 76, 21, 71, 78, 51, 75, 1, 55, 102] | |
''' | |
b[0] = x[2] ^ x[3] ^ x[4] ^ x[8] ^ x[11] ^ x[14] | |
b[1] = x[0] ^ x[1] ^ x[8] ^ x[11] ^ x[13] ^ x[14] | |
b[2] = x[0] ^ x[1] ^ x[2] ^ x[4] ^ x[5] ^ x[8] ^ x[9] ^ x[10] ^ x[13] ^ x[14] ^ x[15] | |
b[3] = x[5] ^ x[6] ^ x[8] ^ x[9] ^ x[10] ^ x[12] ^ x[15] | |
b[4] = x[1] ^ x[6] ^ x[7] ^ x[8] ^ x[12] ^ x[13] ^ x[14] ^ x[15] | |
b[5] = x[0] ^ x[4] ^ x[7] ^ x[8] ^ x[9] ^ x[10] ^ x[12] ^ x[13] ^ x[14] ^ x[15] | |
b[6] = x[1] ^ x[3] ^ x[7] ^ x[9] ^ x[10] ^ x[11] ^ x[12] ^ x[13] ^ x[15] | |
b[7] = x[0] ^ x[1] ^ x[2] ^ x[3] ^ x[4] ^ x[8] ^ x[10] ^ x[11] ^ x[14] | |
b[8] = x[1] ^ x[2] ^ x[3] ^ x[5] ^ x[9] ^ x[10] ^ x[11] ^ x[12] | |
b[9] = x[6] ^ x[7] ^ x[8] ^ x[10] ^ x[11] ^ x[12] ^ x[15] | |
b[10] = x[0] ^ x[3] ^ x[4] ^ x[7] ^ x[8] ^ x[10] ^ x[11] ^ x[12] ^ x[13] ^ x[14] ^ x[15] | |
b[11] = x[0] ^ x[2] ^ x[4] ^ x[6] ^ x[13] | |
b[12] = x[0] ^ x[3] ^ x[6] ^ x[7] ^ x[10] ^ x[12] ^ x[15] | |
b[13] = x[2] ^ x[3] ^ x[4] ^ x[5] ^ x[6] ^ x[7] ^ x[11] ^ x[12] ^ x[13] ^ x[14] | |
b[14] = x[1] ^ x[2] ^ x[3] ^ x[5] ^ x[7] ^ x[11] ^ x[13] ^ x[14] ^ x[15] | |
b[15] = x[1] ^ x[3] ^ x[5] ^ x[9] ^ x[10] ^ x[11] ^ x[13] ^ x[15] | |
''' | |
s.add(x2 ^ x3 ^ x4 ^ x8 ^ x11 ^ x14 == a[0]) | |
s.add(x0 ^ x1 ^ x8 ^ x11 ^ x13 ^ x14 == a[1]) | |
s.add(x0 ^ x1 ^ x2 ^ x4 ^ x5 ^ x8 ^ x9 ^ x10 ^ x13 ^ x14 ^ x15 == a[2]) | |
s.add(x5 ^ x6 ^ x8 ^ x9 ^ x10 ^ x12 ^ x15 == a[3]) | |
s.add(x1 ^ x6 ^ x7 ^ x8 ^ x12 ^ x13 ^ x14 ^ x15 == a[4]) | |
s.add(x0 ^ x4 ^ x7 ^ x8 ^ x9 ^ x10 ^ x12 ^ x13 ^ x14 ^ x15 == a[5]) | |
s.add(x1 ^ x3 ^ x7 ^ x9 ^ x10 ^ x11 ^ x12 ^ x13 ^ x15 == a[6]) | |
s.add(x0 ^ x1 ^ x2 ^ x3 ^ x4 ^ x8 ^ x10 ^ x11 ^ x14 == a[7]) | |
s.add(x1 ^ x2 ^ x3 ^ x5 ^ x9 ^ x10 ^ x11 ^ x12 == a[8]) | |
s.add(x6 ^ x7 ^ x8 ^ x10 ^ x11 ^ x12 ^ x15 == a[9]) | |
s.add(x0 ^ x3 ^ x4 ^ x7 ^ x8 ^ x10 ^ x11 ^ x12 ^ x13 ^ x14 ^ x15 == a[10]) | |
s.add(x0 ^ x2 ^ x4 ^ x6 ^ x13 == a[11]) | |
s.add(x0 ^ x3 ^ x6 ^ x7 ^ x10 ^ x12 ^ x15 == a[12]) | |
s.add(x2 ^ x3 ^ x4 ^ x5 ^ x6 ^ x7 ^ x11 ^ x12 ^ x13 ^ x14 == a[13]) | |
s.add(x1 ^ x2 ^ x3 ^ x5 ^ x7 ^ x11 ^ x13 ^ x14 ^ x15 == a[14]) | |
s.add(x1 ^ x3 ^ x5 ^ x9 ^ x10 ^ x11 ^ x13 ^ x15 == a[15]) | |
print(s.check()) | |
m = s.model() | |
w = [chr((m.eval(_vars[i])).as_long()) for i in range(16)] | |
print(''.join(w)) | |
#print ('{0};{1};{2};{3};{4};{5};{6};{7};{8};{9};{10};{11};{12};{13};{14};{15}'.format(m[x0],m[x1],m[x2],m[x3],m[x4],m[x5],m[x6],m[x7],m[x8],m[x9],m[x10],m[x11],m[x12],m[x13],m[x14],m[x15])) |
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