根据提示信息和逆向分析结果，将爆破范围缩小到2^13*cn(13,26)数量级之后，进行爆破，得到flag
000000000000011111111111112222222222222000011111111100001122222220000011222222011100011122200120200112220112202001122101201201201212001212020120121202010201
from itertools import combinations
from itertools import product
from itertools import permutations
from itertools import combinations_with_replacement
import hashlib
numbers = []
dict = {}
anti = {}
def genNums():
items = ['0', '1', '2']
for p in product(items, items, items, items):
if ''.join(p) == '0000' or ''.join(p) == '1111' or ''.join(p) == '2222':
continue
k = ''.join(p)
numbers.append(k)
arr = []
for i in range(4):
if p[i] == '0':
arr.append(0)
elif p[i] == '1':
arr.append(1)
elif p[i] == '2':
arr.append(-1)
else:
print('unknown num' + p[i])
dict[k] = arr
print(dict)
def sumItem(a, b):
if a[0] + b[0] == 0 and a[1] + b[1] == 0 and a[2] + b[2] == 0 and a[3] + b[3] == 0:
return 0
def checkItem(items):
for n in range(4):
count = 0
for i in items:
if dict[i][n] == 0:
count +=1
if count != 13:
raise Exception("invalid zero")
for item in combinations(items, 2):
sumItem(dict[item[0]], dict[item[1]])
def printItems(items):
str = ''
for i in range(4):
for item in items:
str += item[i]
return str
def permuteUnique(nums):
return list(set(permutations(nums)))
def genNum2():
data = list('0'*13+'1'*13+'2'*13)
all = permuteUnique(data)
print(len(all))
for i in all:
print(''.join(i))
def getInfo(l):
info = [0, 0, 0]
for i in l:
if dict[i][1] == 0:
info[0] += 1
elif dict[i][1] == 1:
info[1] += 1
elif dict[i][1] == -1:
info[2] += 1
return info
def brute2():
genNums()
array0 = []
array12 = []
array1 = []
array2 = []
tmp1 = []
tmp2 = []
dict01 = {}
dict02 = {}
for i in combinations(numbers, 2):
if sumItem(dict[i[0]], dict[i[1]]) == 0:
anti[i[0]] = i[1]
anti[i[1]] = i[0]
if i[0][0] == '0':
array0.append(list(i))
elif i[0][0] == '1':
array1.append(list(i)[0])
set1 = set(array1)
else:
print(i)
if i[0][0] == '0':
if not i[0] in dict01.keys():
dict01[i[0]] = []
if not i[0] in dict02.keys():
dict02[i[0]] = []
if i[1][0] == '1':
dict01[i[0]].append(i[1])
elif i[1][0] == '2':
dict02[i[0]].append(i[1])
for i0 in product(array0[0], array0[1], array0[2], array0[3], array0[4], array0[5], array0[6], array0[7], array0[8], array0[9], array0[10], array0[11], array0[12]):
l = list(i0)
l.sort()
set1 = set()
for i in l:
if len(set1) == 0:
set1 = set(dict01[i])
else:
set1 = set1 & set(dict01[i])
print(l, set1)
l1 = list(set1)
l1.sort()
for i1 in combinations(l1, 13):
tmp = list(set1 - set(i1))
tmp.sort()
l2 = []
for i2 in tmp:
l2.append(anti[i2])
l2.sort()
l1 = list(i1)
l1.sort()
info = getInfo(l)
info1 = getInfo(l1)
info2 = getInfo(l2)
if info[0] + info1[0] + info2[0] == 13 and info[1] + info1[1] + info2[1] == 13 and info[2] + info1[2] + info2[2] == 13:
str = printItems(l+l1+l2)
if hashlib.md5(str.encode()).hexdigest() == "aac82b7ad77ab00dcef90ac079c9490d":
print(str)
if __name__ == '__main__':
brute2()
from itertools import combinations
from itertools import product
from itertools import permutations
from itertools import combinations_with_replacement
import hashlib
numbers = []
dict = {}
anti = {}
def genNums():
items = ['0', '1', '2']
for p in product(items, items, items, items):
if ''.join(p) == '0000' or ''.join(p) == '1111' or ''.join(p) == '2222':
continue
k = ''.join(p)
numbers.append(k)
arr = []
for i in range(4):
if p[i] == '0':
arr.append(0)
elif p[i] == '1':
arr.append(1)
elif p[i] == '2':
arr.append(-1)
else:
print('unknown num' + p[i])
dict[k] = arr
print(dict)
def sumItem(a, b):
if a[0] + b[0] == 0 and a[1] + b[1] == 0 and a[2] + b[2] == 0 and a[3] + b[3] == 0:
return 0
def checkItem(items):
for n in range(4):
count = 0
for i in items:
if dict[i][n] == 0:
count +=1
if count != 13:
raise Exception("invalid zero")
for item in combinations(items, 2):
sumItem(dict[item[0]], dict[item[1]])
def printItems(items):
str = ''
for i in range(4):
for item in items:
str += item[i]
return str
def permuteUnique(nums):
return list(set(permutations(nums)))
def genNum2():
data = list('0'*13+'1'*13+'2'*13)
all = permuteUnique(data)
print(len(all))
for i in all:
print(''.join(i))
def getInfo(l):
info = [0, 0, 0]
for i in l:
if dict[i][1] == 0:
info[0] += 1
elif dict[i][1] == 1:
info[1] += 1
elif dict[i][1] == -1:
info[2] += 1
[招生]科锐逆向工程师培训(2024年11月15日实地，远程教学同时开班, 第51期)
