Big Idea 3.4 Hacks

In this lesson, we were taught string operations, such as string slicing [startindex:endindex], finding substrings .find(), upper or lower case .upper(), .lower(), measuing string length, len(), replacing substrings .replace(), splitting string, .split(), and joining strings .join().

// JavaScript hack for Password Validator

function pswd(password) {
    if (password.length < 8) {
        return "Password too short. Must be at least 8 characters.";
    }

    if (password === password.toLowerCase() || password === password.toUpperCase()) {
        return "Password must contain both uppercase and lowercase letters.";
    }

    if (!/[0-9]/.test(password)) {
        return "Password must contain at least one number.";
    }

    if (!/[!@#$%^&*()_+]/.test(password)) {
        return "Password must contain at least one special character (e.g. !, @, #, etc.)";
    }

    const commonPasswords = ["password", "123456", "letmein", "qwerty", "1234ABCD"];
    if (commonPasswords.includes(password.toLowerCase())) {
        return "Password is too common. Choose something less predictable.";
    }

    const sequentialPatterns = ["123", "abc", "xyz", "asdf"];
    for (const pattern of sequentialPatterns) {
        if (password.toLowerCase().includes(pattern)) {
            return "Password should not contain sequential characters like '123' or 'abc'.";
        }
    }

    let score = 0;
    if (password.length >= 10) {
        score += 1;
    }
    if (/[A-Z]/.test(password) && /[a-z]/.test(password)) {
        score += 1;
    }
    if (/\d/.test(password)) {
        score += 1;
    }
    if (/[!@#$%^&*()_+]/.test(password)) {
        score += 1;
    }

    let strength = "Weak";
    if (score === 2) {
        strength = "Medium";
    } else if (score >= 3) {
        strength = "Strong";
    }

    password = password.replace(/Hello/g, "Hi");
    const words = password.split(" ");
    const customizedPassword = words.join("-");

    return `Password is valid and ${strength}!`;
}

// Example usage
const password = prompt("Please input password: ");
console.log(pswd(password));

#python example - passwork validator
import re

def password_validator(password):
    if len(password) < 8:
        return "Password too short. Must be at least 8 characters."
    
    if password == password.lower() or password == password.upper():
        return "Password must contain both uppercase and lowercase letters."
    
    if not any(char.isdigit() for char in password):
        return "Password must contain at least one number."
    
    if not re.search(r"[!@#$%^&*()_+]", password):
        return "Password must contain at least one special character (e.g. !, @, #, etc.)"
    
    common_passwords = ["password", "123456", "letmein", "qwerty"]
    if password.lower() in common_passwords:
        return "Password is too common. Choose something less predictable."
    
    sequential_patterns = ["123", "abc", "xyz"]
    for pattern in sequential_patterns:
        if pattern in password.lower():
            return "Password should not contain sequential characters like '123' or 'abc'."
    
    score = 0
    if len(password) >= 10:
        score += 1
    if re.search(r"[A-Z]", password) and re.search(r"[a-z]", password):
        score += 1
    if re.search(r"\d", password):
        score += 1
    if re.search(r"[!@#$%^&*()_+]", password):
        score += 1

    strength = "Weak"
    if score == 2:
        strength = "Medium"
    elif score >= 3:
        strength = "Strong"

    password = password.replace("Hello", "Hi")
    words = password.split(" ")
    customized_password = "-".join(words)

    return f"Password is valid and {strength}!"

# Example usage
password = input("Please input password: ")
print(password_validator(password))