Renamed columns in tables

MasterPass passwd -> password_hash
Account enc_pass -> enc_password

.dockerignore

@@ -0,0 +1,27 @@
+**/__pycache__
+**/venv
+**/.classpath
+**/.dockerignore
+**/.env
+**/.git
+**/.gitignore
+**/.project
+**/.settings
+**/.toolstarget
+**/.vs
+**/.vscode
+**/*.*proj.user
+**/*.dbmdl
+**/*.jfm
+**/bin
+**/charts
+**/docker-compose*
+**/compose*
+**/Dockerfile*
+**/node_modules
+**/npm-debug.log
+**/obj
+**/secrets.dev.yaml
+**/values.dev.yaml
+README.md
+data/

.gitignore

@@ -160,3 +160,5 @@ cython_debug/
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
 
+# Database data
+data/

Dockerfile

@@ -0,0 +1,26 @@
+FROM python:3.11-slim
+
+# Keeps Python from generating .pyc files in the container
+ENV PYTHONDONTWRITEBYTECODE=1
+
+# Turns off buffering for easier container logging
+ENV PYTHONUNBUFFERED=1
+
+WORKDIR /app
+
+# Creates new user
+RUN adduser -u 1000 --disabled-password --gecos "" appuser && chown -R appuser /app
+
+# Install deps
+RUN apt update && apt full-upgrade -y
+
+# Install pip requirements
+RUN pip install -U pip setuptools wheel
+COPY requirements.txt .
+RUN pip install -r requirements.txt
+
+COPY . /app
+
+USER appuser
+
+CMD ["python", "main.py"]

README.md

@@ -1,18 +1,38 @@
 # PassManager
 
-### Цель
+## Описание
 
-**Создать бота для сохранения, созания паролей в зашифрованой базе данных.**
+Менеджер паролей для телеграм, где все пароли надёжно зашифрованы
 
-### Задачи
+## Документация
 
-* Создать телеграм бота
-* Научить его работать с БД (MariaDB)
-* Зашифровать БД
-* Сделать общедоступным
+### База данных
 
-### Инструменты
+В качестве базы данных данный бот использует mariadb, к которой бот должен иметь доступ всегда
 
-* Язык программирования Python
-* PyTelegramBotAPI
-* MariaDB
+### Команды и их синтаксис
+
+- /set_master_pass - установить мастер пароль
+- /add_account - создать аккаунт
+- /get_accounts - получить список аккаунтов
+- /get_account - получить логин и пароль аккаунта
+- /delete_account - удалить аккаунт
+- /delete_all - удалить все аккаунты и мастер пароль
+- /reset_master_pass- удалить все аккаунты и изменить мастер пароль
+- /cancel - отмена текущего действия
+- /help - помощь
+- /export - получить пароли в json формате
+- /import - импортировать пароли из json в файле в таком же формате, как из /export
+- /gen_password - создать 10 надёжных паролей
+
+### Настройка
+
+Настройка производится через переменные среды. Их можно прописать в файле .env, если не хотите задавать их каждый раз в случае, если вы не используете Docker
+
+#### Переменные среды
+
+- DB_HOST - ip адрес базы данных
+- DB_USER - пользователь базы данных
+- DB_PASS - пароль пользователя базы данных
+- DB_NAME - название базы данных
+- TG_TOKEN - токен телеграма, его следует указать в файле .env в формате TG_TOKEN={токен}

compose.yaml

@@ -0,0 +1,33 @@
+version: '3.4'
+networks:
+  password_manager: {}
+
+services:
+  passmanager:
+    build:
+      context: .
+      dockerfile: ./Dockerfile
+    restart: always
+    environment:
+      DB_HOST: db
+      DB_USER: manager
+      DB_PASS: passwd123!
+      DB_NAME: passmanager
+      TG_TOKEN: ${TG_TOKEN}
+    depends_on:
+      - db
+    networks:
+      - password_manager
+
+  db:
+    image: stnicolay/mariadb-aria
+    restart: always
+    environment:
+      MYSQL_ROOT_PASSWORD: example123!
+      MYSQL_DATABASE: passmanager
+      MYSQL_USER: manager
+      MYSQL_PASSWORD: passwd123!
+    volumes:
+      - ./data:/var/lib/mysql
+    networks:
+      - password_manager

requirements-dev.txt

@@ -1 +1 @@
-black
+black

requirements.txt

@@ -1,5 +1,6 @@
-bcrypt
 cryptography
-mariadb
+pymysql
 python-dotenv
-pyTelegramBotAPI
+pyTelegramBotAPI
+sqlmodel
+pydantic

src/__init__.py

@@ -1,24 +1,34 @@
 import os
 
 from dotenv import load_dotenv
-from sqlalchemy.future import Engine
 
-from . import bot, cryptography, database
+from . import (
+    account_checks,
+    account_parsing,
+    bot,
+    cryptography,
+    database,
+    generate_password,
+)
 
-__all__ = ["bot", "cryptography", "database"]
-engine: Engine
+__all__ = [
+    "account_checks",
+    "account_parsing",
+    "bot",
+    "cryptography",
+    "database",
+    "generate_password",
+]
 
 
 def main() -> None:
-    global engine
-
     load_dotenv("./.env")
     engine = database.prepare.get_engine(
         host=os.getenv("DB_HOST"),
         user=os.getenv("DB_USER"),
         passwd=os.getenv("DB_PASS"),
         db=os.getenv("DB_NAME"),
-    )  # type: ignore
+    )
     database.prepare.prepare(engine)
-    bot_ = bot.create_bot(os.getenv("TG_TOKEN"), con)  # type: ignore
+    bot_ = bot.create_bot(os.getenv("TG_TOKEN"), engine)
     bot_.infinity_polling()

src/account_checks.py

@@ -0,0 +1,42 @@
+import string
+
+FORBIDDEN_CHARS = frozenset("`\n")
+PUNCTUATION = frozenset(string.punctuation).difference(FORBIDDEN_CHARS)
+
+
+def _base_check(val: str, /) -> bool:
+    "Returns false if finds new lines or backtick (`)"
+    return not any(i in FORBIDDEN_CHARS for i in val)
+
+
+def check_account_name(name: str) -> bool:
+    "Returns true if account name is valid"
+    return _base_check(name)
+
+
+def check_login(login: str) -> bool:
+    "Returns true if login is valid"
+    return _base_check(login)
+
+
+def check_password(passwd: str) -> bool:
+    "Returns true if password is valid"
+    return _base_check(passwd)
+
+
+def check_account(name: str, login: str, passwd: str) -> bool:
+    """Runs checks for account name, login and password"""
+    return check_account_name(name) and check_login(login) and check_password(passwd)
+
+
+def check_gened_password(passwd: str, /) -> bool:
+    """Retuns true if generated password is valid,
+    false otherwise.
+    Password is valid if there is at least one lowercase character,
+    uppercase character and one punctuation character"""
+    return (
+        any(c.islower() for c in passwd)
+        and any(c.isupper() for c in passwd)
+        and any(c.isdigit() for c in passwd)
+        and any(c in PUNCTUATION for c in passwd)
+    )

src/account_parsing.py

@@ -0,0 +1,37 @@
+import io
+from typing import Iterator, Self, Type
+
+import pydantic
+
+
+class _Account(pydantic.BaseModel):
+    name: str
+    login: str
+    password: str
+
+    @classmethod
+    def from_tuple(cls: Type[Self], tuple_: tuple[str, str, str]) -> Self:
+        return cls(name=tuple_[0], login=tuple_[1], passwd=tuple_[2])
+
+    def as_tuple(self: Self) -> tuple[str, str, str]:
+        return (self.name, self.login, self.password)
+
+
+class _Accounts(pydantic.BaseModel):
+    accounts: list[_Account] = pydantic.Field(default_factory=list)
+
+
+def _accounts_list_to_json(accounts: Iterator[tuple[str, str, str]]) -> str:
+    accounts = _Accounts(accounts=[_Account.from_tuple(i) for i in accounts])
+    return accounts.json()
+
+
+def json_to_accounts(json_: str) -> list[tuple[str, str, str]]:
+    accounts = _Accounts.parse_raw(json_)
+    return [i.as_tuple() for i in accounts.accounts]
+
+
+def accounts_to_json(accounts: Iterator[tuple[str, str, str]]) -> io.StringIO:
+    file = io.StringIO(_accounts_list_to_json(accounts))
+    file.name = "passwords.json"
+    return file

src/bot/__init__.py

@@ -0,0 +1,52 @@
+import functools
+
+import telebot
+from sqlalchemy.future import Engine
+
+from . import handlers
+
+__all__ = ["handlers"]
+
+
+def create_bot(token: str, engine: Engine) -> telebot.TeleBot:
+    bot = telebot.TeleBot(token)
+    bot.register_message_handler(
+        functools.partial(handlers.set_master_password, bot, engine),
+        commands=["set_master_pass"],
+    )
+    bot.register_message_handler(
+        functools.partial(handlers.get_account, bot, engine), commands=["get_account"]
+    )
+    bot.register_message_handler(
+        functools.partial(handlers.get_accounts, bot, engine), commands=["get_accounts"]
+    )
+    bot.register_message_handler(
+        functools.partial(handlers.add_account, bot, engine), commands=["add_account"]
+    )
+    bot.register_message_handler(
+        functools.partial(handlers.delete_all, bot, engine), commands=["delete_all"]
+    )
+    bot.register_message_handler(
+        functools.partial(handlers.reset_master_pass, bot, engine),
+        commands=["reset_master_pass"],
+    )
+    bot.register_message_handler(
+        functools.partial(handlers.delete_account, bot, engine),
+        commands=["delete_account"],
+    )
+    bot.register_message_handler(
+        functools.partial(handlers.help, bot), commands=["help", "start"]
+    )
+    bot.register_message_handler(
+        functools.partial(handlers.cancel, bot), commands=["cancel"]
+    )
+    bot.register_message_handler(
+        functools.partial(handlers.export, bot, engine), commands=["export"]
+    )
+    bot.register_message_handler(
+        functools.partial(handlers.import_accounts, bot, engine), commands=["import"]
+    )
+    bot.register_message_handler(
+        functools.partial(handlers.gen_password, bot), commands=["gen_password"]
+    )
+    return bot

src/bot/handlers.py

@@ -0,0 +1,503 @@
+import functools
+import gc
+import time
+
+import telebot
+from sqlalchemy.future import Engine
+
+from .. import cryptography, database, generate_password
+from ..account_checks import (
+    check_account,
+    check_account_name,
+    check_login,
+    check_password,
+)
+from ..account_parsing import accounts_to_json, json_to_accounts
+
+Message = telebot.types.Message
+
+
+def _send_tmp_message(
+    bot: telebot.TeleBot,
+    chat_id: telebot.types.Message,
+    text: str,
+    timeout: int = 5,
+) -> None:
+    bot_mes = bot.send_message(chat_id, text, parse_mode="MarkdownV2")
+    time.sleep(timeout)
+    bot.delete_message(chat_id, bot_mes.id)
+
+
+def _base_handler(
+    bot: telebot.TeleBot, mes: Message, prev_mes: Message | None = None
+) -> None:
+    bot.delete_message(mes.chat.id, mes.id)
+    if prev_mes is not None:
+        bot.delete_message(prev_mes.chat.id, prev_mes.id)
+
+
+def get_accounts(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
+    _base_handler(bot, mes)
+    accounts = database.get.get_accounts(engine, mes.from_user.id)
+    if not accounts:
+        return _send_tmp_message(bot, mes.chat.id, "У вас нет аккаунтов")
+
+    # Make accounts copyable and escape special chars
+    accounts = [f"`{account}`" for account in accounts]
+    _send_tmp_message(
+        bot,
+        mes.chat.id,
+        "Ваши аккаунты:\n"
+        + "\n".join(accounts)
+        + "\nНажмите на название, чтобы скопировать",
+        30,
+    )
+
+
+def delete_all(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
+    _base_handler(bot, mes)
+    bot_mes = bot.send_message(
+        mes.chat.id,
+        "Вы действительно хотите удалить все ваши аккаунты? Это действие нельзя отменить. "
+        "Отправьте YES для подтверждения",
+    )
+    bot.register_next_step_handler(
+        mes, functools.partial(_delete_all, bot, engine, bot_mes)
+    )
+
+
+def _delete_all(
+    bot: telebot.TeleBot, engine: Engine, prev_mes: Message, mes: Message
+) -> None:
+    _base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "YES":
+        database.delete.purge_accounts(engine, mes.from_user.id)
+        database.delete.delete_master_pass(engine, mes.from_user.id)
+        _send_tmp_message(bot, mes.chat.id, "Всё успешно удалено", timeout=10)
+    else:
+        _send_tmp_message(bot, mes.chat.id, "Вы отправили не YES, ничего не удалено")
+
+
+def set_master_password(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
+    _base_handler(bot, mes, None)
+    if database.get.get_master_pass(engine, mes.from_user.id) is not None:
+        return _send_tmp_message(bot, mes.chat.id, "Мастер пароль уже существует")
+    bot_mes = bot.send_message(mes.chat.id, "Отправьте мастер пароль")
+    bot.register_next_step_handler(
+        mes, functools.partial(_set_master_pass2, bot, engine, bot_mes)
+    )
+
+
+def _set_master_pass2(
+    bot: telebot.TeleBot, engine: Engine, prev_mes: Message, mes: Message
+) -> None:
+    _base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    hash_pass, master_salt = cryptography.master_pass.encrypt_master_pass(text)
+    database.add.add_master_pass(engine, mes.from_user.id, master_salt, hash_pass)
+    _send_tmp_message(bot, mes.chat.id, "Успех")
+    del mes, text
+    gc.collect()
+
+
+def reset_master_pass(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
+    _base_handler(bot, mes)
+    if database.get.get_master_pass(engine, mes.from_user.id) is None:
+        return _send_tmp_message(bot, mes.chat.id, "Мастер пароль не задан")
+    bot_mes = bot.send_message(
+        mes.chat.id,
+        "Отправьте новый мастер пароль, осторожно, все текущие аккаунты "
+        "будут удалены навсегда",
+    )
+    bot.register_next_step_handler(
+        mes, functools.partial(_reset_master_pass2, bot, engine, bot_mes)
+    )
+
+
+def _reset_master_pass2(
+    bot: telebot.TeleBot, engine: Engine, prev_mes: Message, mes: Message
+) -> None:
+    _base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    hash_, salt = cryptography.master_pass.encrypt_master_pass(text)
+    database.delete.purge_accounts(engine, mes.from_user.id)
+    database.change.change_master_pass(engine, mes.from_user.id, salt, hash_)
+    _send_tmp_message(
+        bot, mes.chat.id, "Все ваши аккаунты удалены, а мастер пароль изменён"
+    )
+    del mes, text
+    gc.collect()
+
+
+def add_account(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
+    _base_handler(bot, mes)
+
+    master_password_from_db = database.get.get_master_pass(engine, mes.from_user.id)
+    if master_password_from_db is None:
+        return _send_tmp_message(bot, mes.chat.id, "Нет мастер пароля")
+
+    bot_mes = bot.send_message(mes.chat.id, "Отправьте название аккаунта")
+
+    bot.register_next_step_handler(
+        mes, functools.partial(_add_account2, bot, engine, bot_mes)
+    )
+
+
+def _add_account2(
+    bot: telebot.TeleBot, engine: Engine, prev_mes: Message, mes: Message
+) -> None:
+    _base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    if not check_account_name(text):
+        return _send_tmp_message(bot, mes.chat.id, "Не корректное название аккаунта")
+    if text in database.get.get_accounts(engine, mes.from_user.id):
+        return _send_tmp_message(
+            bot, mes.chat.id, "Аккаунт с таким именем уже существует"
+        )
+
+    bot_mes = bot.send_message(mes.chat.id, "Отправьте логин")
+    data = {"name": text}
+
+    bot.register_next_step_handler(
+        mes, functools.partial(_add_account3, bot, engine, bot_mes, data)
+    )
+
+
+def _add_account3(
+    bot: telebot.TeleBot,
+    engine: Engine,
+    prev_mes: Message,
+    data: dict[str, str],
+    mes: Message,
+) -> None:
+    _base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+    if not check_login(text):
+        return _send_tmp_message(bot, mes.chat.id, "Не корректный логин")
+
+    data["login"] = text
+
+    bot_mes = bot.send_message(mes.chat.id, "Отправьте пароль от аккаунта")
+
+    bot.register_next_step_handler(
+        mes, functools.partial(_add_account4, bot, engine, bot_mes, data)
+    )
+
+
+def _add_account4(
+    bot: telebot.TeleBot,
+    engine: Engine,
+    prev_mes: Message,
+    data: dict[str, str],
+    mes: Message,
+) -> None:
+    _base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+    if not check_password(text):
+        return _send_tmp_message(bot, mes.chat.id, "Не корректный пароль")
+
+    data["passwd"] = text
+
+    bot_mes = bot.send_message(mes.chat.id, "Отправьте мастер пароль")
+
+    bot.register_next_step_handler(
+        mes, functools.partial(_add_account5, bot, engine, bot_mes, data)
+    )
+
+
+def _add_account5(
+    bot: telebot.TeleBot,
+    engine: Engine,
+    prev_mes: Message,
+    data: dict[str, str],
+    mes: Message,
+) -> None:
+    _base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    salt, hash_ = database.get.get_master_pass(engine, mes.from_user.id)
+    if not cryptography.master_pass.check_master_pass(text, hash_, salt):
+        return _send_tmp_message(bot, mes.chat.id, "Не подходит главный пароль")
+
+    name, login, passwd = data["name"], data["login"], data["passwd"]
+
+    enc_login, enc_pass, salt = cryptography.other_accounts.encrypt_account_info(
+        login, passwd, text
+    )
+
+    result = database.add.add_account(
+        engine, mes.from_user.id, name, salt, enc_login, enc_pass
+    )
+
+    _send_tmp_message(
+        bot, mes.chat.id, "Успех" if result else "Произошла не предвиденная ошибка"
+    )
+
+    del data, name, login, passwd, enc_login
+
+    gc.collect()
+
+
+def get_account(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
+    _base_handler(bot, mes)
+    bot_mes = bot.send_message(mes.chat.id, "Отправьте название аккаунта")
+
+    master_pass = database.get.get_master_pass(engine, mes.from_user.id)
+    if master_pass is None:
+        return _send_tmp_message(bot, mes.chat.id, "Нет мастер пароля")
+
+    bot.register_next_step_handler(
+        mes, functools.partial(_get_account2, bot, engine, bot_mes)
+    )
+
+
+def _get_account2(
+    bot: telebot.TeleBot, engine: Engine, prev_mes: Message, mes: Message
+) -> None:
+    _base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    if text not in database.get.get_accounts(engine, mes.from_user.id):
+        return _send_tmp_message(bot, mes.chat.id, "Нет такого аккаунта")
+
+    bot_mes = bot.send_message(mes.chat.id, "Отправьте мастер пароль")
+    bot.register_next_step_handler(
+        mes, functools.partial(_get_account3, bot, engine, bot_mes, text)
+    )
+
+
+def _get_account3(
+    bot: telebot.TeleBot, engine: Engine, prev_mes: Message, name: str, mes: Message
+) -> None:
+    _base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    master_salt, hash_pass = database.get.get_master_pass(engine, mes.from_user.id)
+
+    if not cryptography.master_pass.check_master_pass(text, hash_pass, master_salt):
+        return _send_tmp_message(bot, mes.chat.id, "Не подходит мастер пароль")
+
+    salt, enc_login, enc_pass = database.get.get_account_info(
+        engine, mes.from_user.id, name
+    )
+    login, passwd = cryptography.other_accounts.decrypt_account_info(
+        enc_login, enc_pass, text, salt
+    )
+    _send_tmp_message(
+        bot,
+        mes.chat.id,
+        f"Логин:\n`{login}`\nПароль:\n`{passwd}`\nНажмите на логин или пароль, "
+        "чтобы скопировать",
+        30,
+    )
+
+    del text, mes, passwd, login
+    gc.collect()
+
+
+def delete_account(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
+    _base_handler(bot, mes)
+
+    master_pass = database.get.get_master_pass(engine, mes.from_user.id)
+    if master_pass is None:
+        return _send_tmp_message(bot, mes.chat.id, "Нет мастер пароля")
+
+    bot_mes = bot.send_message(
+        mes.chat.id, "Отправьте название аккаунта, который вы хотите удалить"
+    )
+
+    bot.register_next_step_handler(
+        mes, functools.partial(_delete_account2, bot, engine, bot_mes)
+    )
+
+
+def _delete_account2(
+    bot: telebot.TeleBot, engine: Engine, prev_mes: Message, mes: Message
+) -> None:
+    _base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    if text not in database.get.get_accounts(engine, mes.from_user.id):
+        return _send_tmp_message(bot, mes.chat.id, "Нет такого аккаунта")
+
+    database.delete.delete_account(engine, mes.from_user.id, text)
+    _send_tmp_message(bot, mes.chat.id, "Аккаунт удалён")
+
+
+def help(bot: telebot.TeleBot, mes: Message) -> None:
+    message = """Команды:
+/set_master_pass - установить мастер пароль
+/add_account - создать аккаунт
+/get_accounts - получить список аккаунтов
+/get_account - получить логин и пароль аккаунта
+/delete_account - удалить аккаунт
+/delete_all - удалить все аккаунты и мастер пароль
+/reset_master_pass - удалить все аккаунты и изменить мастер пароль
+/cancel - отмена текущего действия
+/help - помощь
+/export - получить пароли в json формате
+/import - импортировать пароли из json в файле в таком же формате, \
+как из /export
+/gen_password - создать 10 надёжных паролей"""
+    bot.send_message(mes.chat.id, message)
+
+
+def cancel(bot: telebot.TeleBot, mes: Message) -> None:
+    _base_handler(bot, mes)
+    _send_tmp_message(bot, mes.chat.id, "Нет активного действия")
+
+
+def export(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
+    _base_handler(bot, mes)
+    master_password_from_db = database.get.get_master_pass(engine, mes.from_user.id)
+
+    if master_password_from_db is None:
+        return _send_tmp_message(bot, mes.chat.id, "Нет мастер пароля")
+
+    if not database.get.get_accounts(engine, mes.from_user.id):
+        return _send_tmp_message(bot, mes.chat.id, "Нет аккаунтов")
+
+    bot_mes = bot.send_message(mes.chat.id, "Отправьте мастер пароль")
+
+    bot.register_next_step_handler(
+        mes, functools.partial(_export2, bot, engine, bot_mes)
+    )
+
+
+def _export2(
+    bot: telebot.TeleBot, engine: Engine, prev_mes: Message, mes: Message
+) -> None:
+    _base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    master_salt, hash_pass = database.get.get_master_pass(engine, mes.from_user.id)
+    if not cryptography.master_pass.check_master_pass(text, hash_pass, master_salt):
+        return _send_tmp_message(bot, mes.chat.id, "Не подходит мастер пароль")
+
+    accounts = database.get.get_all_accounts(engine, mes.from_user.id)
+    accounts = cryptography.other_accounts.decrypt_multiple(accounts, text)
+    json_io = accounts_to_json(accounts)
+    bot_mes = bot.send_document(mes.chat.id, json_io)
+
+    del text, accounts, json_io
+    gc.collect()
+    time.sleep(30)
+    bot.delete_message(bot_mes.chat.id, bot_mes.id)
+
+
+def import_accounts(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
+    _base_handler(bot, mes)
+    master_password_from_db = database.get.get_master_pass(engine, mes.from_user.id)
+
+    if master_password_from_db is None:
+        return _send_tmp_message(bot, mes.chat.id, "Нет мастер пароля")
+
+    bot_mes = bot.send_message(mes.chat.id, "Отправьте json файл")
+
+    bot.register_next_step_handler(
+        mes, functools.partial(_import2, bot, engine, bot_mes)
+    )
+
+
+def _import2(
+    bot: telebot.TeleBot, engine: Engine, prev_mes: Message, mes: Message
+) -> None:
+    _base_handler(bot, mes, prev_mes)
+    if mes.text is not None:
+        text = mes.text.strip()
+        if text == "/cancel":
+            return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    if mes.document is None:
+        return _send_tmp_message(bot, mes.chat.id, "Вы должны отправить документ")
+    if mes.document.file_size > 102_400:  # If file size is bigger that 100 MB
+        return _send_tmp_message(bot, mes.chat.id, "Файл слишком большой")
+
+    file_info = bot.get_file(mes.document.file_id)
+    downloaded_file = bot.download_file(file_info.file_path)
+    try:
+        accounts = json_to_accounts(downloaded_file.decode("utf-8"))
+    except Exception:
+        return _send_tmp_message(bot, mes.chat.id, "Ошибка во время работы с файлом")
+
+    bot_mes = bot.send_message(mes.chat.id, "Отправьте мастер пароль")
+    bot.register_next_step_handler(
+        mes, functools.partial(_import3, bot, engine, bot_mes, accounts)
+    )
+
+
+def _import3(
+    bot: telebot.TeleBot,
+    engine: Engine,
+    prev_mes: Message,
+    accounts: list[tuple[str, str, str]],
+    mes: Message,
+) -> None:
+    _base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    master_salt, hash_pass = database.get.get_master_pass(engine, mes.from_user.id)
+    if not cryptography.master_pass.check_master_pass(text, hash_pass, master_salt):
+        return _send_tmp_message(bot, mes.chat.id, "Не подходит мастер пароль")
+
+    # List of names of accounts, which failed to be added to the database or failed tests
+    failed: list[str] = []
+    for account in accounts:
+        name, login, passwd = account
+        if not check_account(name, login, passwd):
+            failed.append(name)
+            continue
+        enc_login, enc_passwd, salt = cryptography.other_accounts.encrypt_account_info(
+            login, passwd, text
+        )
+        result = database.add.add_account(
+            engine, mes.from_user.id, name, salt, enc_login, enc_passwd
+        )
+        if not result:
+            failed.append(name)
+
+    if failed:
+        mes_text = "Не удалось добавить:\n" + "\n".join(failed)
+    else:
+        mes_text = "Успех"
+    _send_tmp_message(bot, mes.chat.id, mes_text, 10)
+    del text, mes, accounts
+    gc.collect()
+
+
+def gen_password(bot: telebot.TeleBot, mes: Message) -> None:
+    _base_handler(bot, mes)
+    # Generate 10 passwords and put 'em in the backticks
+    passwords = (f"`{generate_password.gen_password()}`" for _ in range(10))
+    text = (
+        "Пароли:\n"
+        + "\n".join(passwords)
+        + "\nНажмите на пароль, чтобы его скопировать"
+    )
+    _send_tmp_message(bot, mes.chat.id, text, 15)

src/cryptography/master_pass.py

@@ -1,14 +1,39 @@
-import bcrypt
+import os
 
-print("Hi")
+from cryptography.exceptions import InvalidKey
+from cryptography.hazmat.primitives.kdf.scrypt import Scrypt
+
+MEMORY_USAGE = 2**14
 
 
-def encrypt_master_pass(passwd: str) -> tuple[bytes, bytes]:
+def _get_kdf(salt: bytes) -> Scrypt:
+    kdf = Scrypt(
+        salt=salt,
+        length=128,
+        n=MEMORY_USAGE,
+        r=8,
+        p=1,
+    )
+    return kdf
+
+
+def encrypt_master_pass(password: str) -> tuple[bytes, bytes]:
     """Hashes master password and return tuple of hashed password and salt"""
-    salt = bcrypt.gensalt()
-    hashed = bcrypt.hashpw(passwd.encode("utf-8"), salt)
-    return (hashed, salt)
+    salt = os.urandom(64)
+    kdf = _get_kdf(salt)
+    return kdf.derive(password.encode("utf-8")), salt
 
 
-def encrypt_master_pass_known_salt(passwd: str, salt: bytes) -> bytes:
-    return bcrypt.hashpw(passwd.encode("utf-8"), salt)
+def check_master_pass(
+    password: str,
+    enc_password: bytes,
+    salt: bytes,
+) -> bool:
+    """Checks if the master password is correct"""
+    kdf = _get_kdf(salt)
+    try:
+        kdf.verify(password.encode("utf-8"), enc_password)
+    except InvalidKey:
+        return False
+    else:
+        return True

src/cryptography/other_accounts.py

@@ -1,6 +1,6 @@
 import base64
-
-import bcrypt
+import os
+from typing import Iterator
 
 from cryptography.fernet import Fernet
 from cryptography.hazmat.backends import default_backend
@@ -21,23 +21,42 @@ def _generate_key(salt: bytes, master_pass: bytes) -> bytes:
 
 
 def encrypt_account_info(
-    login: str, passwd: str, master_pass: bytes
+    login: str, passwd: str, master_pass: str
 ) -> tuple[bytes, bytes, bytes]:
-    """Encrypts login and password of a user using hash of their master password as a key.
-    Returns a tuple of encrypted login password and salt"""
-    salt = bcrypt.gensalt()
-    key = _generate_key(salt, master_pass)
+    """Encrypts login and password of a user using their master
+    password as a key.
+    Returns a tuple of encrypted login, password and salt"""
+    salt = os.urandom(64)
+    key = _generate_key(salt, master_pass.encode("utf-8"))
     f = Fernet(key)
-    enc_login = f.encrypt(login.encode("utf-8"))
-    enc_passwd = f.encrypt(passwd.encode("utf-8"))
-    return (enc_login, enc_passwd, salt)
+    enc_login = base64.urlsafe_b64decode(f.encrypt(login.encode("utf-8")))
+    enc_password = base64.urlsafe_b64decode(f.encrypt(passwd.encode("utf-8")))
+    return (enc_login, enc_password, salt)
 
 
 def decrypt_account_info(
-    enc_login: bytes, enc_pass: bytes, master_pass: bytes, salt: bytes
+    enc_login: bytes,
+    enc_pass: bytes,
+    master_pass: str,
+    salt: bytes,
 ) -> tuple[str, str]:
-    key = _generate_key(salt, master_pass)
+    """Decrypts login and password using their
+    master password as a key.
+    Returns a tuple of decrypted login and password"""
+    key = _generate_key(salt, master_pass.encode("utf-8"))
     f = Fernet(key)
-    login_bytes = f.decrypt(enc_login)
-    pass_bytes = f.decrypt(enc_pass)
-    return (login_bytes.decode("utf-8"), pass_bytes.decode("utf-8"))
+    login = f.decrypt(base64.urlsafe_b64encode(enc_login)).decode("utf-8")
+    password = f.decrypt(base64.urlsafe_b64encode(enc_pass)).decode("utf-8")
+    return (login, password)
+
+
+def decrypt_multiple(
+    accounts: Iterator[tuple[str, bytes, bytes, bytes]], master_pass: str
+) -> Iterator[tuple[str, str, str]]:
+    """Gets an iterator of tuples, where values represent account's name, salt,
+    encrypted login and encrypted password.
+    Return an iterator of names, logins and passwords as a tuple"""
+    for account in accounts:
+        name, salt, enc_login, enc_passwd = account
+        login, passwd = decrypt_account_info(enc_login, enc_passwd, master_pass, salt)
+        yield (name, login, passwd)

src/database/__init__.py

@@ -1,3 +1,3 @@
-from . import add, delete, get, models, prepare
+from . import add, delete, get, models, prepare, change
 
-__all__ = ["add", "delete", "get", "models", "prepare"]
+__all__ = ["add", "delete", "get", "models", "prepare", "change"]

src/database/add.py

@@ -1,5 +1,5 @@
 import sqlmodel
-import mariadb
+from sqlalchemy.exc import IntegrityError
 from sqlalchemy.future import Engine
 
 from . import models
@@ -11,30 +11,43 @@ def add_account(
     name: str,
     salt: bytes,
     enc_login: bytes,
-    enc_pass: bytes,
+    enc_password: bytes,
 ) -> bool:
-    """Adds account to db. Returns true, if on success"""
+    """Adds account to the database. Returns true on success, false otherwise"""
     account = models.Account(
-        user_id=user_id, name=name, salt=salt, enc_login=enc_login, enc_pass=enc_pass
+        user_id=user_id,
+        name=name,
+        salt=salt,
+        enc_login=enc_login,
+        enc_password=enc_password,
     )
     try:
         with sqlmodel.Session(engine) as session:
             session.add(account)
             session.commit()
-    except Exception:
+    except IntegrityError:
         return False
     else:
         return True
 
 
-def add_master_pass(engine: Engine, user_id: int, salt: bytes, passwd: bytes) -> bool:
-    """Adds master password to db. Returns true, if on success"""
-    master_pass = models.MasterPass(user_id=user_id, salt=salt, passwd=passwd)
+def add_master_pass(
+    engine: Engine,
+    user_id: int,
+    salt: bytes,
+    password_hash: bytes,
+) -> bool:
+    """Adds master password the database. Returns true on success, false otherwise"""
+    master_pass = models.MasterPass(
+        user_id=user_id,
+        salt=salt,
+        password_hash=password_hash,
+    )
     try:
         with sqlmodel.Session(engine) as session:
             session.add(master_pass)
             session.commit()
-    except Exception:
+    except IntegrityError:
         return False
     else:
         return True

src/database/change.py

@@ -0,0 +1,18 @@
+import sqlmodel
+from sqlalchemy.future import Engine
+
+from . import models
+
+
+def change_master_pass(
+    engine: Engine, user_id: int, salt: bytes, password: bytes
+) -> None:
+    """Changes master password and salt in the database"""
+    statement = (
+        sqlmodel.update(models.MasterPass)
+        .where(models.MasterPass.user_id == user_id)
+        .values(salt=salt, passwd=password)
+    )
+    with sqlmodel.Session(engine) as session:
+        session.exec(statement)
+        session.commit()

src/database/delete.py

@@ -0,0 +1,35 @@
+import sqlmodel
+from sqlalchemy.future import Engine
+
+from . import models
+
+
+def purge_accounts(engine: Engine, user_id: int) -> None:
+    """Deletes all user's accounts"""
+    statement = sqlmodel.delete(models.Account).where(
+        models.Account.user_id == user_id,
+    )
+    with sqlmodel.Session(engine) as session:
+        session.exec(statement)
+        session.commit()
+
+
+def delete_master_pass(engine: Engine, user_id: int) -> None:
+    """Delets master password of the user"""
+    statement = sqlmodel.delete(models.MasterPass).where(
+        models.MasterPass.user_id == user_id
+    )
+    with sqlmodel.Session(engine) as session:
+        session.exec(statement)
+        session.commit()
+
+
+def delete_account(engine: Engine, user_id: int, name: str) -> None:
+    """Deletes specific user account"""
+    statement = sqlmodel.delete(models.Account).where(
+        models.Account.user_id == user_id,
+        models.Account.name == name,
+    )
+    with sqlmodel.Session(engine) as session:
+        session.exec(statement)
+        session.commit()

src/database/get.py

@@ -1,39 +1,64 @@
+from typing import Iterator
+
 import sqlmodel
 from sqlalchemy.future import Engine
 
 from . import models
 
 
-def get_master_pass(engine: Engine, user_id: int) -> tuple[bytes, bytes] | None:
-    """Gets master pass. Returns tuple of salt and password"""
+def get_master_pass(
+    engine: Engine,
+    user_id: int,
+) -> tuple[bytes, bytes] | None:
+    """Gets master pass. Returns tuple of salt and password
+    or None if it wasn't found"""
     statement = sqlmodel.select(models.MasterPass).where(
-        models.MasterPass.user_id == user_id
+        models.MasterPass.user_id == user_id,
     )
     with sqlmodel.Session(engine) as session:
         result = session.exec(statement).first()
-        print(result)
     if result is None:
         return
-    return (result.salt, result.passwd)
+    return (result.salt, result.password_hash)
 
 
 def get_accounts(engine: Engine, user_id: int) -> list[str]:
     """Gets list of account names"""
-    statement = sqlmodel.select(models.Account).where(models.Account.user_id == user_id)
+    statement = sqlmodel.select(models.Account).where(
+        models.Account.user_id == user_id,
+    )
     with sqlmodel.Session(engine) as session:
         result = session.exec(statement)
-    return [account.name for account in result]
+        return [account.name for account in result]
+
+
+def get_all_accounts(
+    engine: Engine, user_id: int
+) -> Iterator[tuple[str, bytes, bytes, bytes]]:
+    """Returns an iterator of tuples, where values represent account's name, salt,
+    encrypted login and encrypted password"""
+    statement = sqlmodel.select(models.Account).where(
+        models.Account.user_id == user_id,
+    )
+    with sqlmodel.Session(engine) as session:
+        result = session.exec(statement)
+        yield from (
+            (account.name, account.salt, account.enc_login, account.enc_password)
+            for account in result
+        )
 
 
 def get_account_info(
     engine: Engine, user_id: int, name: str
 ) -> tuple[bytes, bytes, bytes]:
-    """Gets account info. Returns tuple of salt, login and password"""
+    """Gets account info. Returns tuple of salt, login and password
+    or None if it wasn't found"""
     statement = sqlmodel.select(models.Account).where(
-        models.Account.user_id == user_id and models.Account.name == name
+        models.Account.user_id == user_id,
+        models.Account.name == name,
     )
     with sqlmodel.Session(engine) as session:
         result = session.exec(statement).first()
-    if result is None:
-        return
-    return (result.salt, result.enc_login, result.enc_pass)
+        if result is None:
+            return
+        return (result.salt, result.enc_login, result.enc_password)

src/database/models.py

@@ -8,10 +8,10 @@ class MasterPass(sqlmodel.SQLModel, table=True):
     id: Optional[int] = sqlmodel.Field(primary_key=True)
     user_id: int = sqlmodel.Field(nullable=False, index=True, unique=True)
     salt: bytes = sqlmodel.Field(
-        sa_column=sqlmodel.Column(type_=sqlmodel.VARBINARY(255), nullable=False)
+        sa_column=sqlmodel.Column(sqlmodel.BINARY(64), nullable=False)
     )
-    passwd: bytes = sqlmodel.Field(
-        sa_column=sqlmodel.Column(type_=sqlmodel.VARBINARY(255), nullable=False)
+    password_hash: bytes = sqlmodel.Field(
+        sa_column=sqlmodel.Column(sqlmodel.BINARY(128), nullable=False)
     )
 
 
@@ -22,11 +22,11 @@ class Account(sqlmodel.SQLModel, table=True):
     user_id: int = sqlmodel.Field(nullable=False, index=True)
     name: str = sqlmodel.Field(nullable=False, index=True, max_length=255)
     salt: bytes = sqlmodel.Field(
-        sa_column=sqlmodel.Column(type_=sqlmodel.VARBINARY(255), nullable=False)
+        sa_column=sqlmodel.Column(sqlmodel.BINARY(64), nullable=False)
     )
     enc_login: bytes = sqlmodel.Field(
-        sa_column=sqlmodel.Column(type_=sqlmodel.VARBINARY(255), nullable=False)
+        sa_column=sqlmodel.Column(sqlmodel.VARBINARY(256), nullable=False)
     )
-    enc_pass: bytes = sqlmodel.Field(
-        sa_column=sqlmodel.Column(type_=sqlmodel.VARBINARY(255), nullable=False)
+    enc_password: bytes = sqlmodel.Field(
+        sa_column=sqlmodel.Column(sqlmodel.VARBINARY(256), nullable=False)
     )

src/database/prepare.py

@@ -5,12 +5,12 @@ from . import models
 
 
 def get_engine(host: str, user: str, passwd: str, db: str) -> Engine:
-    engine = sqlmodel.create_engine(
-        f"mariadb+mariadbconnector://{user}:{passwd}@{host}/{db}"
-    )
-    print(type(engine))
+    """Creates an engine for mariadb with pymysql as connector"""
+    uri = f"mariadb+pymysql://{user}:{passwd}@{host}/{db}"
+    engine = sqlmodel.create_engine(uri)
     return engine
 
 
 def prepare(engine: Engine) -> None:
-    sqlmodel.SQLModel.metadata.create_all(engine, [models.Account, models.MasterPass])
+    """Creates all tables, indexes and constrains in the database"""
+    sqlmodel.SQLModel.metadata.create_all(engine)

src/generate_password.py

@@ -0,0 +1,18 @@
+import string
+from random import SystemRandom
+
+from .account_checks import FORBIDDEN_CHARS, PUNCTUATION, check_gened_password
+
+PASSWORD_CHARS = tuple(
+    frozenset(string.ascii_letters + string.digits).difference(FORBIDDEN_CHARS)
+    | PUNCTUATION
+)
+
+
+def gen_password() -> str:
+    """Generates password of length 32"""
+    choices = SystemRandom().choices
+    while True:
+        passwd = "".join(choices(PASSWORD_CHARS, k=32))
+        if check_gened_password(passwd):
+            return passwd