password_strength

Simple python script that iterates through user input provided passwords and prints password strength.

Password validations considered

1. Length
2. Character type (special, uppercase, lowercase, number)
3. Password dictionary containing pwned passwords

What's next for password_strength

• Execute an API call to haveibeenpwned api instead of checking a password dictionary

import string
import os

LOW = "low"
MEDIUM = "medium"
HIGH = "high"


def contains_required_chars(pwd):
    contains_special = False
    contains_lower = False
    contains_upper = False
    contains_number = False

    for chr in pwd:
        if chr in set(string.punctuation):
            contains_special = True
        if chr in str(range(10)):
            contains_number = True
        if chr in set(string.ascii_lowercase):
            contains_lower = True
        if chr in set(string.ascii_uppercase):
            contains_upper = True

    return contains_special and contains_lower and contains_number and contains_upper 


def get_strength(pwd, pwd_set):
    if not contains_required_chars(pwd) or pwd in pwd_set or len(pwd)<8: 
        return LOW

    if len(pwd)<15: return MEDIUM
    return HIGH


if __name__ == '__main__':
    print("Loading password dictionary")

    script_path = os.path.realpath(os.path.dirname(__file__))
    pwd_dict_path = os.path.join(script_path, "pwd_dict.txt")

    with open(pwd_dict_path, "r") as f: 
        pwd_set = set(line.strip() for line in f)

    print("Loaded file")

    while True:
        try:
            pwd = input("Enter password: ")
            print(get_strength(pwd, pwd_set))
        except KeyboardInterrupt: break

Built With

• python