checkmypass.py

import requests
import hashlib

# take passowrds from the txt file, each passowrd should be in seperate line
with open('password_file_name.txt', mode="r", encoding='UTF-8') as my_password:
    passwords = my_password.readlines()

# make request to pwned


def request_api_data(query_char):
    url = 'https://api.pwnedpasswords.com/range/' + query_char
    res = requests.get(url)
    if res.status_code != 200:
        raise RuntimeError(
            f'Error fetching:{res.status_code}, check the api and try again.')
    return res


'''check if there is any match for the tails from the data that is requested from pwned,
    return the number of leaking if there is a match
    hashes = all responses, hash_to_check = tail'''


def get_password_leak_count(hashes, hash_to_check):
    hashes = (line.split(':') for line in hashes.text.splitlines())
    for h, count in hashes:
        if h == hash_to_check:
            return count
    return 0  # return 0 if no match

# check if part of the password exists in the API response
# convert password to sha1 form first


def pwned_api_check(password):
    sha1password = hashlib.sha1(password.encode('utf-8')).hexdigest().upper()
    first5_cha, tail = sha1password[:5], sha1password[5:]
    # only return the rest of the shalpssword besides frist5_cha, aka tail
    response = request_api_data(first5_cha)
    return get_password_leak_count(response, tail)


def main(passwords):
    for password in passwords:
        count = pwned_api_check(password)
        if count:
            print(
                f'{password} was found {count} times....you should change your password')
        else:
            print(f'{password} was Not found. Carry on!')
    return "checked"


main(passwords)

'''code below is for taking arguments from terminal directly

    import sys library if using the code below'''

# def main(args):
#     for password in args:
#         count = pwned_api_check(password)
#         if count:
#             print(f'{password} was found {count} times....you should change your password')
#         else:
#             print(f'{password} was Not found. Carry on!' )
#     return "checked"

# main(sys.argv[1:])
# '''