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infosec/hw3/ex2/ex2b.py
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ex2b.py
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import hashlib
import itertools
import copy
password_hashes = ["d6a3008832c6df7ae1c2639b92b4a488a8a39f44b2ef3aaeef6c250323c4234f",
"432412d528b45077bc440d61d495e61ea0a3b4281289ec2a93128c4ecd8ca4c1",
"83193318341e44c94863304c676e0310fb8e41de4d941e5d116d3be718f9aaeb",
"d0d99d165bc7fa28d6abb0079131b070ff28bd88a957632ed9939cf7e3065897",
"311e6dcf855ef219fefc77ec299e9d574852ad950162e50a09d94411e4db6c66",
"2b659b52adebcb99317899dd653de27bcb95d3b9ee2bc27cf193c66e0324a0a0",
"2a7eb4fd76f676f204bb33a359c12ba509c1e558f961af77df0c5ea6d372ca2b",
"96f3dd6f309a18c1847433a09e58bf6f0c62e210e0579672e5d4928337fbc838",
"e2a7cae9cadde439b02554cb41599c0de96c5e5b3c62c59b427a98f3606b871b",
"00981b27b0e9d7f0c697ce301798a5621390a228ec59ffb2c35cfbf5e5f6b14e"]
def sha256_hex(text):
return hashlib.sha256(text).hexdigest()
#get index of each occurance
def find_occurances(string, chr):
return [i for i, letter in enumerate(string) if letter == chr]
#replace all given letters in word by given number
def replace_by_number(word, letter, number):
#get all indices
letter_indices = find_occurances(word, letter)
#to list because cannot change in string
word_as_list = list(word)
for i in letter_indices:
word_as_list[i] = str(number)
return ["".join(word_as_list)]
#all possible modifications of word
def word_modifications(word):
#do not forget to keep normal word as possibility
modified_words = [word, word.title()]
#e as 3
words_to_modify = copy.deepcopy(modified_words)
for word in words_to_modify:
modified_words += replace_by_number(word, 'e', 3)
#o as 0
words_to_modify = copy.deepcopy(modified_words)
for to_modify in words_to_modify:
modified_words += replace_by_number(to_modify, 'o', 0)
#i as 1
words_to_modify = copy.deepcopy(modified_words)
for to_modify in words_to_modify:
modified_words += replace_by_number(to_modify, 'i', 1)
#all possible words can also be titelized
titleized = []
for word in modified_words:
titleized.append(word.title())
return list(set(modified_words + titleized))
def main():
#download rockyou.txt
wordlist = open('rockyou.txt', 'r',encoding='latin-1')
results=[]
for word in wordlist:
word_raw = word.rstrip()
#check if all characters alphanumeric
if not word_raw.isalnum():
continue
#get all possible modifications
modified_words = word_modifications(word_raw)
for modified_word in modified_words:
word_hash = sha256_hex(modified_word.encode('utf-8'))
#check if right hash
if word_hash in password_hashes:
if modified_word not in results:
results.append(modified_word)
print(modified_word)
if len(results)==10:
break
if len(results)==10:
break
return results
if __name__ == "__main__":
main()
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