password_checker.py

import requests
import hashlib
import sys


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

def get_password_leaks_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


def pwned_api_check(password):
  #check password if it exists in the api for not
  sha1password = hashlib.sha1(password.encode('utf-8')).hexdigest().upper()
  #print(password.encode('utf-8'))
  first5_char, tail = sha1password[:5] , sha1password[5:]
  response = request_api_data(first5_char)
  #print(first5_char , tail)
  #print(response)
  return get_password_leaks_count(response , tail)



def main(args):
  for password in args:
    count = pwned_api_check(password)
    if count:
      print(f'{password} was found {count} times.... you should change it')
    else:
      print(f'{password} was never used... It is secure password')
  return 'done!'


if __name__ == '__main__':
  sys.exit(main(sys.argv[1:]))