PassGuard

import hashlib
import requests

# Function to check if a password has been leaked
def check_password_leak(password):
    # Hash the password using SHA-1
    sha1_password = hashlib.sha1(password.encode('utf-8')).hexdigest().upper()

    # The first 5 characters of the hash (for k-anonymity)
    prefix = sha1_password[:5]

    # The rest of the hash
    suffix = sha1_password[5:]

    # Query the Have I Been Pwned API with the first 5 characters
    url = f'https://api.pwnedpasswords.com/range/{prefix}'
    response = requests.get(url)

    # Check if the request was successful
    if response.status_code == 200:
        # Check if the suffix is in the response
        hashes = (line.split(':') for line in response.text.splitlines())
        for h, count in hashes:
            if h == suffix:
                return True, count
        return False, 0
    else:
        raise Exception(f"Failed to connect to API: {response.status_code}")

# Example usage
if __name__ == "__main__":
    passwords = ["password1", "password2", "password3"]
    results = check_multiple_passwords(passwords)
    for password, (leaked, count) in results.items():
        if leaked:
            print(f"Password '{password}' has been leaked {count} times.")
        else:
            print(f"Password '{password}' is safe (not found in known breaches).")