secert_password_generator

import secrets
import string
import argparse
import sys

def generate_secure_password(length=16):
    """
    Generates a cryptographically secure random password.
    Ensures at least one lowercase, one uppercase, one digit, and one special character.
    """
    # Define the character sets
    letters_low = string.ascii_lowercase
    letters_up = string.ascii_uppercase
    digits = string.digits
    symbols = string.punctuation

    # Combine all characters for the main pool
    all_characters = letters_low + letters_up + digits + symbols

    while True:
        # Generate a password using secrets.choice for cryptographic security
        password = ''.join(secrets.choice(all_characters) for _ in range(length))

        # Security Check: Ensure the password meets 'strength' criteria
        # This prevents the 'random' chance of getting a password with only numbers
        if (any(c in letters_low for c in password)
                and any(c in letters_up for c in password)
                and any(c in digits for c in password)
                and any(c in symbols for c in password)):
            return password

def main():
    # Setup command line arguments (from your first script)
    parser = argparse.ArgumentParser(description='Generate a cryptographically secure password.')
    parser.add_argument('length', type=int, nargs='?', help='Length of the password')
    args = parser.parse_args()

    # Determine length: use argument, or ask user if no argument was provided
    if args.length:
        length = args.length
    else:
        try:
            user_input = input("Enter password length (default 16): ")
            length = int(user_input) if user_input.strip() else 16
        except ValueError:
            print("Invalid input. Using default length of 16.")
            length = 16

    if length < 4:
        print("Error: Length must be at least 4 to satisfy complexity requirements.")
        sys.exit(1)

    # Generate and print
    secure_password = generate_secure_password(length)
    print("-" * 30)
    print(f"Generated Secure Password: {secure_password}")
    print("-" * 30)

if __name__ == '__main__':
    main()