Recover KeePass password that was entered with a typo with John the Ripper.

password-permutations.py

"""
Generate wordlist for recovering a password that was entered with a typo.
Assume the password consists of three elements of random words generated by gpw,
separated by punctuation marks and numbers.

python password-permutations.py > passwords.txt
sudo snap install john-the-ripper
john-the-ripper.keepass2john Database.kdbx > passwordhash.txt 
john-the-ripper --wordlist=passwords.txt passwordhash.txt 
"""
import itertools


def flatten(list_of_lists):
    return itertools.chain.from_iterable(list_of_lists)


def uppercase_either_first_or_second_letter(word):
    return [word,
            word.title(),
            word[0] + word[1].swapcase() + word[2:]]


def word_permutations(word, min_len, max_len=None):
    if not max_len:
        max_len = len(word)
    lengths = range(min_len, max_len + 1)
    result = []
    for length in lengths:
        words = flatten(uppercase_either_first_or_second_letter(''.join(p))
                     for p in itertools.permutations(word, length))
        result.extend(words)
    return result


def all_annas():
    return [c for c in word_permutations('anna', 3)
           if c[0].lower() == 'a'
           or c[0].lower() == 'n']

def all_bertas():
    return [c for c in word_permutations('berta', 4)
           if c[0].lower() == 'b'
           or c[0].lower() == 'e'
           or c[0].lower() == 'r']

def all_cecils():
    return [c for c in word_permutations('cecil', 4)
           if c[0].lower() == 'c'
           or c[0].lower() == 'e']
  
if __name__ == '__main__':
    for anna in all_annas():
        for comma in [',', '.', ';', ':']:
            for berta in all_bertas():
                for num in [2, 3, 4, 5]:
                    for cecil in all_cecils():
                        word = f"{anna}{comma}{berta}{num}{cecil}"
                        print(word)