In [4]:

    

fh = open('cipher1.txt', 'r')
values = map(lambda x: int(x), fh.read().split(','))

# key is 3 letters from a-z
key_length = 3
valid_chars = [chr(i) for i in xrange(ord('a'), ord('z') + 1)]
clue_words = [' the ', ' and ', ' or ', ' but ', ' in ']

def guess_password(password='', key_length=3):
    if key_length > 0:
        for char in valid_chars:
            guess_password(password + char, key_length - 1)
    else:
        xored = []
        for i in xrange(len(values)):
            xored.append(chr(values[i] ^ ord(password[i % 3])))
        xored_text = ''.join(xored)
        matches = 0
        for clue_word in clue_words:
            if clue_word in xored_text:
                matches += 1
        if matches > 3:
            print (password)
            print (xored_text[:100])
            print (sum(map(lambda x: ord(x), xored)))
            return

guess_password()


    

    




---------------------------------------------------------------------------
FileNotFoundError                         Traceback (most recent call last)
<ipython-input-4-eb7d22611363> in <module>()
----> 1 fh = open('cipher1.txt', 'r')
      2 values = map(lambda x: int(x), fh.read().split(','))
      3 
      4 # key is 3 letters from a-z
      5 key_length = 3

FileNotFoundError: [Errno 2] No such file or directory: 'cipher1.txt'

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