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def set_master_password(self): """Initialize or change master password.""" while True: pwd1 = getpass.getpass("New master password: ") pwd2 = getpass.getpass("Confirm master password: ") if pwd1 == pwd2 and len(pwd1) >= 6: self.master_password = pwd1 print("✅ Master password set.") break else: print("❌ Passwords must match and be at least 6 chars.")

STORAGE_FILE = "storage.enc" SALT_SIZE = 16 IV_SIZE = 16 ITERATIONS = 100_000

- The storage file `storage.enc` is encrypted but **not** resistant to offline brute‑force if master password is weak. - Use a **strong master password** (≥12 chars, mixed case, numbers, symbols). - For production, consider adding **key stretching (Argon2)** and **authentication (HMAC)**. breezip password

def _encrypt(self, plaintext: str, password: str) -> str: """Encrypt data with AES-256-CBC.""" salt = os.urandom(SALT_SIZE) iv = os.urandom(IV_SIZE) key = self._derive_key(password, salt) cipher = Cipher(algorithms.AES(key), modes.CBC(iv), backend=default_backend()) encryptor = cipher.encryptor() # Pad plaintext to multiple of 16 bytes padded = plaintext.encode() + b"\x00" * (16 - len(plaintext) % 16) ciphertext = encryptor.update(padded) + encryptor.finalize() # Store: salt + iv + ciphertext combined = salt + iv + ciphertext return base64.b64encode(combined).decode()

def save(self): """Save data to encrypted file.""" if not self.master_password: print("❌ Master password not set.") return json_str = json.dumps(self.data, indent=2) enc_content = self._encrypt(json_str, self.master_password) with open(STORAGE_FILE, "w") as f: f.write(enc_content) print("✅ Data saved securely.") def _encrypt(self, plaintext: str, password: str) -> str:

def generate_password(self, length=16, use_digits=True, use_special=True): """Generate a strong random password.""" chars = string.ascii_letters if use_digits: chars += string.digits if use_special: chars += "!@#$%^&*()-_=+[]{}|;:,.<>?" return ''.join(secrets.choice(chars) for _ in range(length))

pip install -r requirements.txt #!/usr/bin/env python3 """ BreeZip Password Manager Securely store and retrieve passwords with AES-256 encryption. """ import os import json import base64 import getpass import secrets import string from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2 from cryptography.hazmat.primitives import hashes from cryptography.hazmat.backends import default_backend Get password") print("3

while True: print("\n📌 MENU") print("1. Add new password") print("2. Get password") print("3. List all services") print("4. Delete entry") print("5. Change master password") print("6. Generate random password only") print("7. Exit") choice = input("Choose (1-7): ").strip()