def derive_key(password: str, salt: bytes) -> bytes: kdf = PBKDF2( algorithm=hashes.SHA256(), length=32, salt=salt, iterations=100000, ) return base64.urlsafe_b64encode(kdf.derive(password.encode()))
key = derive_key(password, salt) cipher = Fernet(key) folder lock github
with open(os.path.join(folder_path, ".salt"), "wb") as f: f.write(salt) with open(LOCKED_FLAG, "w") as f: f.write(folder_path) def derive_key(password: str, salt: bytes) -> bytes: kdf
for file in os.listdir(folder_path): if file.endswith(".enc"): enc_path = os.path.join(folder_path, file) with open(enc_path, "rb") as f: encrypted = f.read() decrypted = cipher.decrypt(encrypted) orig_path = enc_path[:-4] with open(orig_path, "wb") as f: f.write(decrypted) os.remove(enc_path) def derive_key(password: str
with open(LOCKED_FLAG, "r") as f: folder_path = f.read().strip()
# Encrypt each file in folder for root, _, files in os.walk(folder_path): for file in files: file_path = os.path.join(root, file) with open(file_path, "rb") as f: data = f.read() encrypted = cipher.encrypt(data) with open(file_path + ".enc", "wb") as f: f.write(encrypted) os.remove(file_path)
with open(salt_path, "rb") as f: salt = f.read()