212 lines
4.5 KiB
Python
212 lines
4.5 KiB
Python
#!/usr/bin/env python3
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import numpy
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from string import *
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with open("./hacker-manifesto.enc") as f:
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lines = f.readlines()
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for i in range(len(lines)):
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lines[i] = bytes.fromhex(lines[i])
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#shortest_line = min(lines,key=len)
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#min_len = len(shortest_line)
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longest_line = max(lines, key=len)
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max_len = len(longest_line)
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candidates_list = []
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CHARACTER_FREQ = {
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'a': 0.0651738, 'b': 0.0124248, 'c': 0.0217339, 'd': 0.0349835, 'e': 0.1041442, 'f': 0.0197881, 'g': 0.0158610,
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'h': 0.0492888, 'i': 0.0558094, 'j': 0.0009033, 'k': 0.0050529, 'l': 0.0331490, 'm': 0.0202124, 'n': 0.0564513,
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'o': 0.0596302, 'p': 0.0137645, 'q': 0.0008606, 'r': 0.0497563, 's': 0.0515760, 't': 0.0729357, 'u': 0.0225134,
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'v': 0.0082903, 'w': 0.0171272, 'x': 0.0013692, 'y': 0.0145984, 'z': 0.0007836, ' ': 0.1918182
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} # ','
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for byte_to_guess in range(max_len):
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#print(f"Byte num:{byte_to_guess}")
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counters = numpy.zeros(256,dtype=float)
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for guessed_byte in range(256):
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for line in lines:
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#print(f"Now line: {line}")
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#line = bytes.fromhex(line)
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if byte_to_guess >= len(line):
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continue
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if chr(line[byte_to_guess] ^ guessed_byte) in printable:
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counters[guessed_byte] += CHARACTER_FREQ.get(chr(line[byte_to_guess] ^ guessed_byte).lower(),0)
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max_match = max(counters)
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match_list = [(counters[i],i) for i in range(256)]
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ordered_match_list=sorted(match_list, reverse=True)
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candidates = []
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#for pair in ordered_match_list:
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# if pair[0] < max_match * .95:
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# break
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# candidates.append(pair)
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candidates_list.append(ordered_match_list)
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keystream = bytearray()
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for x in candidates_list:
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keystream += x[0][1].to_bytes(1,byteorder='big')
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from Cryptodome.Util.strxor import strxor
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dec = keystream[0] ^ lines[0][0]
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mask = dec ^ ord('T')
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keystream[0] = keystream[0] ^ mask
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dec1 = keystream[1] ^ lines[0][1]
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mask = dec1 ^ ord('h')
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keystream[1] = keystream[1] ^ mask
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dec2 = keystream[2] ^ lines[0][2]
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mask = dec2 ^ ord('i')
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keystream[2] = keystream[2] ^ mask
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dec3 = keystream[3] ^ lines[0][3]
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mask = dec3 ^ ord('s')
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keystream[3] = keystream[3] ^ mask
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dec5 = keystream[5] ^ lines[0][5]
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mask = dec5 ^ ord('i')
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keystream[5] = keystream[5] ^ mask
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pos=28
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dec = keystream[pos] ^ lines[0][pos]
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mask = dec ^ ord('o')
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keystream[pos] = keystream[pos] ^ mask
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l=4
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pos=17
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dec = keystream[pos] ^ lines[4][pos]
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mask = dec ^ ord('s')
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keystream[pos] = keystream[pos] ^ mask
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l=4
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pos=20
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord('w')
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keystream[pos] = keystream[pos] ^ mask
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l=1
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pos=34
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord(' ')
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keystream[pos] = keystream[pos] ^ mask
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l=1
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pos=36
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord(' ')
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keystream[pos] = keystream[pos] ^ mask
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l=1
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pos=37
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord('s')
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keystream[pos] = keystream[pos] ^ mask
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l=1
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pos=38
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord('e')
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keystream[pos] = keystream[pos] ^ mask
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l=1
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pos=40
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord('v')
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keystream[pos] = keystream[pos] ^ mask
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l=2
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pos=49
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord('r')
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keystream[pos] = keystream[pos] ^ mask
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l=2
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pos=53
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord('b')
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keystream[pos] = keystream[pos] ^ mask
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l=2
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pos=42
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord('w')
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keystream[pos] = keystream[pos] ^ mask
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l=2
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pos=43
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord('a')
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keystream[pos] = keystream[pos] ^ mask
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l=2
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pos=45
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord('n')
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keystream[pos] = keystream[pos] ^ mask
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l=0
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pos=46
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord('o')
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keystream[pos] = keystream[pos] ^ mask
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l=1
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pos=57
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord('t')
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keystream[pos] = keystream[pos] ^ mask
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l=1
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pos=58
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord('i')
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keystream[pos] = keystream[pos] ^ mask
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l=1
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pos=59
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord('n')
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keystream[pos] = keystream[pos] ^ mask
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l=1
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pos=64
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord('t')
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keystream[pos] = keystream[pos] ^ mask
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l=1
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pos=65
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord('h')
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keystream[pos] = keystream[pos] ^ mask
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l=1
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pos=67
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dec = keystream[pos] ^ lines[l][pos]
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mask = dec ^ ord('u')
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keystream[pos] = keystream[pos] ^ mask
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for line in lines:
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l = min(len(keystream),len(line))
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print(strxor(line[:l],keystream[:l]))
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