Added validation to the database models

Now running encrytion of accounts in ProcessPoolExecutor

.dockerignore

@@ -1,5 +1,5 @@
 **/__pycache__
-**/.venv
+**/venv
 **/.classpath
 **/.dockerignore
 **/.env
@@ -24,4 +24,5 @@
 **/secrets.dev.yaml
 **/values.dev.yaml
 README.md
-data/
+database/
+.flake8

.flake8

@@ -0,0 +1,2 @@
+[flake8]
+exclude=.git,__pycache__,venv

.gitignore

@@ -161,4 +161,4 @@ cython_debug/
 #.idea/
 
 # Database data
-data/
+database/data/

Dockerfile

@@ -15,8 +15,9 @@ RUN adduser -u 1000 --disabled-password --gecos "" appuser && chown -R appuser /
 RUN apt update && apt full-upgrade -y
 
 # Install pip requirements
+RUN pip install -U pip setuptools wheel
 COPY requirements.txt .
-RUN python -m pip install -r requirements.txt
+RUN pip install -r requirements.txt
 
 COPY . /app
 

README.md

@@ -23,6 +23,7 @@
 - /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
 

compose.yaml

@@ -20,7 +20,9 @@ services:
       - password_manager
 
   db:
-    image: stnicolay/mariadb-aria
+    build:
+      context: ./database/
+      dockerfile: ./Dockerfile
     restart: always
     environment:
       MYSQL_ROOT_PASSWORD: example123!
@@ -28,6 +30,6 @@ services:
       MYSQL_USER: manager
       MYSQL_PASSWORD: passwd123!
     volumes:
-      - ./data:/var/lib/mysql
+      - ./database/data:/var/lib/mysql
     networks:
       - password_manager

database/Dockerfile

@@ -0,0 +1,3 @@
+FROM mariadb
+
+COPY mariadb.cnf /etc/mysql/mariadb.cnf

database/mariadb.cnf

@@ -0,0 +1,38 @@
+# The MariaDB configuration file
+#
+# The MariaDB/MySQL tools read configuration files in the following order:
+# 0. "/etc/mysql/my.cnf" symlinks to this file, reason why all the rest is read.
+# 1. "/etc/mysql/mariadb.cnf" (this file) to set global defaults,
+# 2. "/etc/mysql/conf.d/*.cnf" to set global options.
+# 3. "/etc/mysql/mariadb.conf.d/*.cnf" to set MariaDB-only options.
+# 4. "~/.my.cnf" to set user-specific options.
+#
+# If the same option is defined multiple times, the last one will apply.
+#
+# One can use all long options that the program supports.
+# Run program with --help to get a list of available options and with
+# --print-defaults to see which it would actually understand and use.
+#
+# If you are new to MariaDB, check out https://mariadb.com/kb/en/basic-mariadb-articles/
+
+#
+# This group is read both by the client and the server
+# use it for options that affect everything
+#
+[client-server]
+# Port or socket location where to connect
+# port = 3306
+socket = /run/mysqld/mysqld.sock
+
+# Import all .cnf files from configuration directory
+[mariadbd]
+skip-host-cache
+skip-name-resolve
+
+[mysqld]
+skip-innodb
+default-storage-engine=Aria
+default-tmp-storage-engine=Aria
+
+!includedir /etc/mysql/mariadb.conf.d/
+!includedir /etc/mysql/conf.d/

requirements-dev.txt

@@ -1 +1,3 @@
 black
+flake8
+isort

requirements.txt

@@ -4,3 +4,4 @@ python-dotenv
 pyTelegramBotAPI
 sqlmodel
 pydantic
+aiohttp

src/__init__.py

@@ -1,22 +1,37 @@
+import asyncio
 import os
 
 from dotenv import load_dotenv
-from sqlalchemy.future import Engine
 
-from . import bot, cryptography, database
+from . import (
+    account_checks,
+    account_parsing,
+    bot,
+    db,
+    decrypted_account,
+    encryption,
+    generate_password,
+)
 
-__all__ = ["bot", "cryptography", "database"]
+__all__ = [
-engine: Engine
+    "account_checks",
+    "account_parsing",
+    "bot",
+    "decrypted_account",
+    "encryption",
+    "db",
+    "generate_password",
+]
 
 
 def main() -> None:
     load_dotenv("./.env")
-    engine = database.prepare.get_engine(
+    engine = db.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)
+    db.prepare.prepare(engine)
-    bot_ = bot.create_bot(os.getenv("TG_TOKEN"), engine)  # type: ignore
+    bot_ = bot.create_bot(os.getenv("TG_TOKEN"), engine)
-    bot_.infinity_polling()
+    asyncio.run(bot_.infinity_polling())

src/account_checks.py

@@ -0,0 +1,50 @@
+import string
+
+from .decrypted_account import DecryptedAccount
+
+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(account: DecryptedAccount) -> bool:
+    """Runs checks for account name, login and password"""
+    return all(
+        (
+            check_account_name(account.name),
+            check_login(account.login),
+            check_password(account.password),
+        )
+    )
+
+
+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 +1,50 @@
+import io
+from typing import Iterable, Self
+
+import pydantic
+
+from .decrypted_account import DecryptedAccount
+
+
+class _Account(pydantic.BaseModel):
+    name: str
+    login: str
+    password: str
+
+    def to_usual_account(self, user_id: int) -> DecryptedAccount:
+        return DecryptedAccount(
+            user_id=user_id,
+            name=self.name,
+            login=self.login,
+            password=self.password,
+        )
+
+    @classmethod
+    def from_usual_account(cls, account: DecryptedAccount) -> Self:
+        return cls(
+            name=account.name,
+            login=account.login,
+            password=account.password,
+        )
+
+
+class _Accounts(pydantic.BaseModel):
+    accounts: list[_Account] = pydantic.Field(default_factory=list)
+
+
+def _accounts_list_to_json(accounts: Iterable[DecryptedAccount]) -> str:
+    result = _Accounts(
+        accounts=[_Account.from_usual_account(i) for i in accounts],
+    ).json(ensure_ascii=False, indent=2)
+    return result
+
+
+def json_to_accounts(json_: str, user_id: int) -> list[DecryptedAccount]:
+    accounts = _Accounts.parse_raw(json_)
+    return [account.to_usual_account(user_id) for account in accounts.accounts]
+
+
+def accounts_to_json(accounts: Iterable[DecryptedAccount]) -> io.StringIO:
+    file = io.StringIO(_accounts_list_to_json(accounts))
+    file.name = "passwords.json"
+    return file

src/bot/__init__.py

@@ -1,49 +1,77 @@
 import functools
 
 from sqlalchemy.future import Engine
-import telebot
+from telebot.async_telebot import AsyncTeleBot
 
-from . import handlers, utils
+from . import callback_handlers, exception_handler, message_handlers
 
-__all__ = ["handlers", "utils"]
+__all__ = ["callback_handlers", "exception_handler", "message_handlers"]
 
 
-def create_bot(token: str, engine: Engine) -> telebot.TeleBot:
+def create_bot(token: str, engine: Engine) -> AsyncTeleBot:
-    bot = telebot.TeleBot(token)
+    bot = AsyncTeleBot(token, exception_handler=exception_handler.Handler)
     bot.register_message_handler(
-        functools.partial(handlers.set_master_password, bot, engine),
+        functools.partial(message_handlers.set_master_password, bot, engine),
         commands=["set_master_pass"],
     )
     bot.register_message_handler(
-        functools.partial(handlers.get_account, bot, engine), commands=["get_account"]
+        functools.partial(message_handlers.get_account, bot, engine),
+        commands=["get_account"],
     )
     bot.register_message_handler(
-        functools.partial(handlers.get_accounts, bot, engine), commands=["get_accounts"]
+        functools.partial(message_handlers.get_accounts, bot, engine),
+        commands=["get_accounts"],
     )
     bot.register_message_handler(
-        functools.partial(handlers.add_account, bot, engine), commands=["add_account"]
+        functools.partial(message_handlers.add_account, bot, engine),
+        commands=["add_account"],
     )
     bot.register_message_handler(
-        functools.partial(handlers.delete_all, bot, engine), commands=["delete_all"]
+        functools.partial(message_handlers.delete_all, bot, engine),
+        commands=["delete_all"],
     )
     bot.register_message_handler(
-        functools.partial(handlers.reset_master_pass, bot, engine),
+        functools.partial(message_handlers.reset_master_pass, bot, engine),
         commands=["reset_master_pass"],
     )
     bot.register_message_handler(
-        functools.partial(handlers.delete_account, bot, engine),
+        functools.partial(message_handlers.delete_account, bot, engine),
         commands=["delete_account"],
     )
     bot.register_message_handler(
-        functools.partial(handlers.help, bot), commands=["help", "start"]
+        functools.partial(message_handlers.help_command, bot),
+        commands=["help", "start"],
     )
     bot.register_message_handler(
-        functools.partial(handlers.cancel, bot), commands=["cancel"]
+        functools.partial(message_handlers.export, bot, engine),
+        commands=["export"],
     )
     bot.register_message_handler(
-        functools.partial(handlers.export, bot, engine), commands=["export"]
+        functools.partial(message_handlers.import_accounts, bot, engine),
+        commands=["import"],
     )
     bot.register_message_handler(
-        functools.partial(handlers.import_accounts, bot, engine), commands=["import"]
+        functools.partial(message_handlers.gen_password, bot),
+        commands=["gen_password"],
+    )
+    bot.register_message_handler(
+        functools.partial(message_handlers.message_handler, bot),
+        content_types=[
+            "text",
+            "audio",
+            "document",
+            "photo",
+            "sticker",
+            "video",
+            "video_note",
+            "voice",
+            "location",
+            "contact",
+        ],
+    )
+
+    bot.register_callback_query_handler(
+        functools.partial(callback_handlers.delete_message, bot),
+        lambda call: call.data == "DELETE",
     )
     return bot

src/bot/callback_handlers.py

@@ -0,0 +1,8 @@
+from telebot.async_telebot import AsyncTeleBot
+from telebot.types import CallbackQuery as Callback
+
+from . import helper_functions
+
+
+async def delete_message(bot: AsyncTeleBot, call: Callback) -> None:
+    await helper_functions.delete_message(bot, call.message)

src/bot/exception_handler.py

@@ -0,0 +1,8 @@
+import traceback
+from typing import Type
+
+
+class Handler:
+    @staticmethod
+    def handle(exc: Type[BaseException]) -> None:
+        traceback.print_exception(exc)

src/bot/handlers.py

@@ -1,473 +0,0 @@
-import functools
-import gc
-import time
-
-import telebot
-from sqlalchemy.future import Engine
-
-from .. import cryptography, database
-from .utils import (
-    accounts_to_json,
-    base_handler,
-    check_account_name,
-    check_login,
-    check_passwd,
-    check_account,
-    get_all_accounts,
-    json_to_accounts,
-    send_tmp_message,
-)
-
-Message = telebot.types.Message
-
-
-def get_accounts(
-    bot: telebot.TeleBot, engine: Engine, mes: telebot.types.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: telebot.types.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_passwd(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.encode("utf-8")
-    )
-
-    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.encode("utf-8"), 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: telebot.types.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"""
-    bot.send_message(mes.chat.id, message)
-
-
-def cancel(bot: telebot.TeleBot, mes: Message) -> None:
-    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 = get_all_accounts(engine, mes.from_user.id, 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.encode("utf-8")
-        )
-        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()

src/bot/helper_functions.py

@@ -0,0 +1,87 @@
+import asyncio
+from typing import Any, Awaitable, Callable
+
+import telebot
+from telebot.async_telebot import AsyncTeleBot
+
+from . import markups
+
+Message = telebot.types.Message
+Handler = Callable[[Message], Awaitable[Any]]
+Markups = (
+    telebot.types.ReplyKeyboardMarkup
+    | telebot.types.InlineKeyboardMarkup
+    | telebot.types.ReplyKeyboardRemove
+)
+states: dict[tuple[int, int], Handler] = {}
+
+
+def register_state(
+    message: Message,
+    handler: Handler,
+) -> None:
+    states[(message.chat.id, message.from_user.id)] = handler
+
+
+def reset_state(message: Message) -> None:
+    try:
+        del states[(message.chat.id, message.from_user.id)]
+    except KeyError:
+        pass
+
+
+def get_state(message: Message) -> Handler | None:
+    return states.get((message.chat.id, message.from_user.id))
+
+
+async def delete_message(
+    bot: AsyncTeleBot,
+    mes: Message,
+    *,
+    sleep_time: int = 0,
+) -> bool:
+    await asyncio.sleep(sleep_time)
+    try:
+        await bot.delete_message(mes.chat.id, mes.id)
+    except telebot.apihelper.ApiException:
+        return False
+    else:
+        return True
+
+
+async def send_tmp_message(
+    bot: AsyncTeleBot,
+    chat_id: telebot.types.Message,
+    text: str,
+    *,
+    sleep_time: int = 5,
+    markup: Markups | None = None,
+) -> None:
+    bot_mes = await bot.send_message(
+        chat_id, text, parse_mode="MarkdownV2", reply_markup=markup
+    )
+    await delete_message(bot, bot_mes, sleep_time=sleep_time)
+
+
+async def base_handler(
+    bot: AsyncTeleBot, mes: Message, prev_mes: Message | None = None
+) -> None:
+    reset_state(mes)
+    await delete_message(bot, mes)
+    if prev_mes is not None:
+        await delete_message(bot, prev_mes)
+
+
+async def send_deleteable_message(
+    bot: AsyncTeleBot,
+    chat_id: int,
+    text: str,
+) -> None:
+    """Sends a message with a delete button"""
+    markup = markups.deletion_markup()
+    await bot.send_message(
+        chat_id,
+        text,
+        parse_mode="MarkdownV2",
+        reply_markup=markup,
+    )

src/bot/markups.py

@@ -0,0 +1,18 @@
+from telebot.types import (
+    InlineKeyboardButton,
+    InlineKeyboardMarkup,
+    ReplyKeyboardMarkup,
+)
+
+
+def deletion_markup() -> InlineKeyboardMarkup:
+    markup = InlineKeyboardMarkup(row_width=5)
+    button = InlineKeyboardButton("Удалить сообщение", callback_data="DELETE")
+    markup.add(button)
+    return markup
+
+
+def account_markup(account_names: list[str]) -> ReplyKeyboardMarkup:
+    markup = ReplyKeyboardMarkup(resize_keyboard=True, row_width=2)
+    markup.add(*account_names)
+    return markup

src/bot/message_handlers.py

@@ -0,0 +1,761 @@
+import asyncio
+import functools
+import gc
+import itertools
+from concurrent.futures import ProcessPoolExecutor
+
+import telebot
+from sqlalchemy.future import Engine
+from telebot.async_telebot import AsyncTeleBot
+
+from .. import db, encryption, 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
+from ..decrypted_account import DecryptedAccount
+from . import markups
+from .helper_functions import (
+    base_handler,
+    delete_message,
+    get_state,
+    register_state,
+    send_deleteable_message,
+    send_tmp_message,
+)
+
+Message = telebot.types.Message
+
+
+async def get_accounts(
+    bot: AsyncTeleBot,
+    engine: Engine,
+    mes: Message,
+) -> None:
+    await base_handler(bot, mes)
+    accounts = db.get.get_account_names(
+        engine,
+        mes.from_user.id,
+        to_sort=True,
+    )
+    if not accounts:
+        return await 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]
+    await send_deleteable_message(
+        bot,
+        mes.chat.id,
+        "Ваши аккаунты:\n"
+        + "\n".join(accounts)
+        + "\nНажмите на название, чтобы скопировать\n"
+        f"Всего {len(accounts)}",
+    )
+
+
+async def delete_all(bot: AsyncTeleBot, engine: Engine, mes: Message) -> None:
+    await base_handler(bot, mes)
+    master_pass = db.get.get_master_pass(engine, mes.from_user.id)
+    if master_pass is None:
+        await send_tmp_message(bot, mes.chat.id, "У вас нет мастер пароля")
+        return
+    bot_mes = await bot.send_message(
+        mes.chat.id,
+        "Вы действительно хотите удалить все ваши аккаунты? Это действие "
+        "нельзя отменить. "
+        "Отправьте мастер пароль для подтверждения",
+    )
+    register_state(
+        mes, functools.partial(_delete_all2, bot, engine, master_pass, bot_mes)
+    )
+
+
+async def _delete_all2(
+    bot: AsyncTeleBot,
+    engine: Engine,
+    master_pass: db.models.MasterPass,
+    prev_mes: Message,
+    mes: Message,
+) -> None:
+    await base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if encryption.master_pass.check_master_pass(text, master_pass):
+        db.delete.purge_accounts(engine, mes.from_user.id)
+        db.delete.delete_master_pass(engine, mes.from_user.id)
+        await send_tmp_message(
+            bot,
+            mes.chat.id,
+            "Всё успешно удалено",
+            sleep_time=10,
+        )
+    else:
+        await send_tmp_message(
+            bot,
+            mes.chat.id,
+            "Вы отправили не верный мастер пароль, ничего не удалено",
+        )
+
+
+async def set_master_password(
+    bot: AsyncTeleBot,
+    engine: Engine,
+    mes: Message,
+) -> None:
+    await base_handler(bot, mes, None)
+    if db.get.get_master_pass(engine, mes.from_user.id) is not None:
+        return await send_tmp_message(
+            bot,
+            mes.chat.id,
+            "Мастер пароль уже существует",
+        )
+    bot_mes = await bot.send_message(mes.chat.id, "Отправьте мастер пароль")
+    register_state(
+        mes,
+        functools.partial(_set_master_pass2, bot, engine, bot_mes),
+    )
+
+
+async def _set_master_pass2(
+    bot: AsyncTeleBot, engine: Engine, prev_mes: Message, mes: Message
+) -> None:
+    await base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return await send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    master_password = encryption.master_pass.encrypt_master_pass(
+        mes.from_user.id,
+        text,
+    )
+    db.add.add_master_pass(engine, master_password)
+
+    await send_tmp_message(bot, mes.chat.id, "Успех")
+    del mes, text
+    gc.collect()
+
+
+async def reset_master_pass(
+    bot: AsyncTeleBot,
+    engine: Engine,
+    mes: Message,
+) -> None:
+    await base_handler(bot, mes)
+
+    master_pass = db.get.get_master_pass(engine, mes.from_user.id)
+    if master_pass is None:
+        return await send_tmp_message(
+            bot,
+            mes.chat.id,
+            "Мастер пароль не задан",
+        )
+
+    bot_mes = await bot.send_message(
+        mes.chat.id,
+        "Отправьте текущий мастер пароль",
+    )
+
+    register_state(
+        mes,
+        functools.partial(
+            _reset_master_pass2,
+            bot,
+            engine,
+            master_pass,
+            bot_mes,
+        ),
+    )
+
+
+async def _reset_master_pass2(
+    bot: AsyncTeleBot,
+    engine: Engine,
+    master_pass: db.models.MasterPass,
+    prev_mes: Message,
+    mes: Message,
+) -> None:
+    await base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        await send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    if not encryption.master_pass.check_master_pass(text, master_pass):
+        await send_tmp_message(bot, mes.chat.id, "Неверный мастер пароль")
+        return
+
+    bot_mes = await bot.send_message(
+        mes.chat.id,
+        "Отправьте новый мастер пароль. Осторожно, все аккаунты будут удалены",
+    )
+    register_state(
+        mes,
+        functools.partial(_reset_master_pass3, bot, engine, bot_mes),
+    )
+
+
+async def _reset_master_pass3(
+    bot: AsyncTeleBot, engine: Engine, prev_mes: Message, mes: Message
+) -> None:
+    await base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return await send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    master_password = encryption.master_pass.encrypt_master_pass(
+        mes.from_user.id,
+        text,
+    )
+    db.delete.purge_accounts(engine, mes.from_user.id)
+    db.change.change_master_pass(engine, master_password)
+
+    await send_tmp_message(
+        bot, mes.chat.id, "Все ваши аккаунты удалены, а мастер пароль изменён"
+    )
+    del mes, text
+    gc.collect()
+
+
+async def add_account(bot: AsyncTeleBot, engine: Engine, mes: Message) -> None:
+    await base_handler(bot, mes)
+
+    master_password_from_db = db.get.get_master_pass(
+        engine,
+        mes.from_user.id,
+    )
+    if master_password_from_db is None:
+        return await send_tmp_message(bot, mes.chat.id, "Нет мастер пароля")
+
+    bot_mes = await bot.send_message(
+        mes.chat.id,
+        "Отправьте название аккаунта",
+    )
+
+    register_state(
+        mes,
+        functools.partial(_add_account2, bot, engine, bot_mes),
+    )
+
+
+async def _add_account2(
+    bot: AsyncTeleBot, engine: Engine, prev_mes: Message, mes: Message
+) -> None:
+    await base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return await send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    if not check_account_name(text):
+        return await send_tmp_message(
+            bot,
+            mes.chat.id,
+            "Не корректное название аккаунта",
+        )
+    if text in db.get.get_account_names(engine, mes.from_user.id):
+        return await send_tmp_message(
+            bot, mes.chat.id, "Аккаунт с таким именем уже существует"
+        )
+
+    bot_mes = await bot.send_message(mes.chat.id, "Отправьте логин")
+    data = {"name": text}
+
+    register_state(
+        mes,
+        functools.partial(_add_account3, bot, engine, bot_mes, data),
+    )
+
+
+async def _add_account3(
+    bot: AsyncTeleBot,
+    engine: Engine,
+    prev_mes: Message,
+    data: dict[str, str],
+    mes: Message,
+) -> None:
+    await base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return await send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+    if not check_login(text):
+        return await send_tmp_message(bot, mes.chat.id, "Не корректный логин")
+
+    data["login"] = text
+
+    bot_mes = await bot.send_message(
+        mes.chat.id,
+        "Отправьте пароль от аккаунта",
+    )
+
+    register_state(
+        mes,
+        functools.partial(_add_account4, bot, engine, bot_mes, data),
+    )
+
+
+async def _add_account4(
+    bot: AsyncTeleBot,
+    engine: Engine,
+    prev_mes: Message,
+    data: dict[str, str],
+    mes: Message,
+) -> None:
+    await base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return await send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+    if not check_password(text):
+        return await send_tmp_message(
+            bot,
+            mes.chat.id,
+            "Не корректный пароль",
+        )
+
+    data["passwd"] = text
+
+    bot_mes = await bot.send_message(mes.chat.id, "Отправьте мастер пароль")
+
+    register_state(
+        mes,
+        functools.partial(_add_account5, bot, engine, bot_mes, data),
+    )
+
+
+async def _add_account5(
+    bot: AsyncTeleBot,
+    engine: Engine,
+    prev_mes: Message,
+    data: dict[str, str],
+    mes: Message,
+) -> None:
+    await base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return await send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    master_password = db.get.get_master_pass(engine, mes.from_user.id)
+    if not encryption.master_pass.check_master_pass(text, master_password):
+        return await send_tmp_message(
+            bot,
+            mes.chat.id,
+            "Не подходит главный пароль",
+        )
+
+    # name, login, passwd = data["name"], data["login"], data["passwd"]
+    account = DecryptedAccount(
+        user_id=mes.from_user.id,
+        name=data["name"],
+        login=data["login"],
+        password=data["passwd"],
+    )
+
+    encrypted_account = encryption.accounts.encrypt(account, text)
+
+    result = db.add.add_account(
+        engine,
+        encrypted_account,
+    )
+
+    await send_tmp_message(
+        bot,
+        mes.chat.id,
+        "Успех" if result else "Произошла не предвиденная ошибка",
+    )
+
+    del data, account
+
+    gc.collect()
+
+
+async def get_account(bot: AsyncTeleBot, engine: Engine, mes: Message) -> None:
+    await base_handler(bot, mes)
+
+    master_pass = db.get.get_master_pass(engine, mes.from_user.id)
+    if master_pass is None:
+        return await send_tmp_message(bot, mes.chat.id, "Нет мастер пароля")
+
+    accounts = db.get.get_account_names(
+        engine,
+        mes.from_user.id,
+        to_sort=True,
+    )
+    markup = markups.account_markup(accounts)
+    bot_mes = await bot.send_message(
+        mes.chat.id, "Отправьте название аккаунта", reply_markup=markup
+    )
+    register_state(
+        mes,
+        functools.partial(_get_account2, bot, engine, bot_mes),
+    )
+
+
+async def _get_account2(
+    bot: AsyncTeleBot, engine: Engine, prev_mes: Message, mes: Message
+) -> None:
+    await base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return await send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    if text not in db.get.get_account_names(engine, mes.from_user.id):
+        return await send_tmp_message(bot, mes.chat.id, "Нет такого аккаунта")
+
+    bot_mes = await bot.send_message(mes.chat.id, "Отправьте мастер пароль")
+    register_state(
+        mes,
+        functools.partial(_get_account3, bot, engine, bot_mes, text),
+    )
+
+
+async def _get_account3(
+    bot: AsyncTeleBot,
+    engine: Engine,
+    prev_mes: Message,
+    name: str,
+    mes: Message,
+) -> None:
+    await base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return await send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    master_password = db.get.get_master_pass(
+        engine,
+        mes.from_user.id,
+    )
+
+    if not encryption.master_pass.check_master_pass(text, master_password):
+        return await send_tmp_message(
+            bot,
+            mes.chat.id,
+            "Не подходит мастер пароль",
+        )
+
+    account = db.get.get_account_info(engine, mes.from_user.id, name)
+    account = encryption.accounts.decrypt(account, text)
+    await send_deleteable_message(
+        bot,
+        mes.chat.id,
+        f"Название:\n`{account.name}`\n"
+        f"Логин:\n`{account.login}`\nПароль:\n`{account.password}`\nНажмите "
+        "на название, логин или пароль, чтобы скопировать",
+    )
+
+    del text, mes
+    gc.collect()
+
+
+async def delete_account(
+    bot: AsyncTeleBot,
+    engine: Engine,
+    mes: Message,
+) -> None:
+    await base_handler(bot, mes)
+
+    master_pass = db.get.get_master_pass(engine, mes.from_user.id)
+    if master_pass is None:
+        return await send_tmp_message(bot, mes.chat.id, "Нет мастер пароля")
+
+    accounts = db.get.get_account_names(
+        engine,
+        mes.from_user.id,
+        to_sort=True,
+    )
+    markup = markups.account_markup(accounts)
+    bot_mes = await bot.send_message(
+        mes.chat.id,
+        "Отправьте название аккаунта, который вы хотите удалить",
+        reply_markup=markup,
+    )
+
+    register_state(
+        mes,
+        functools.partial(_delete_account2, bot, engine, master_pass, bot_mes),
+    )
+
+
+async def _delete_account2(
+    bot: AsyncTeleBot,
+    engine: Engine,
+    master_pass: db.models.MasterPass,
+    prev_mes: Message,
+    mes: Message,
+):
+    await base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return await send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    if text not in db.get.get_account_names(engine, mes.from_user.id):
+        return await send_tmp_message(bot, mes.chat.id, "Нет такого аккаунта")
+
+    bot_mes = await bot.send_message(
+        mes.from_user.id,
+        f'Вы уверены, что хотите удалить аккаунт "{text}"?\nОтправьте мастер '
+        "пароль для подтверждения",
+    )
+
+    register_state(
+        mes,
+        functools.partial(
+            _delete_account3,
+            bot,
+            engine,
+            master_pass,
+            bot_mes,
+            text,
+        ),
+    )
+
+
+async def _delete_account3(
+    bot: AsyncTeleBot,
+    engine: Engine,
+    master_pass: db.models.MasterPass,
+    prev_mes: Message,
+    account_name: str,
+    mes: Message,
+) -> None:
+    await base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if not encryption.master_pass.check_master_pass(text, master_pass):
+        await send_tmp_message(bot, mes.chat.id, "Неверный пароль")
+        return
+
+    db.delete.delete_account(engine, mes.from_user.id, account_name)
+    await send_tmp_message(bot, mes.chat.id, "Аккаунт удалён")
+
+
+async def help_command(bot: AsyncTeleBot, 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"""
+    await bot.send_message(mes.chat.id, message)
+
+
+async def export(bot: AsyncTeleBot, engine: Engine, mes: Message) -> None:
+    await base_handler(bot, mes)
+    master_password_from_db = db.get.get_master_pass(
+        engine,
+        mes.from_user.id,
+    )
+
+    if master_password_from_db is None:
+        return await send_tmp_message(bot, mes.chat.id, "Нет мастер пароля")
+
+    if not db.get.get_account_names(engine, mes.from_user.id):
+        return await send_tmp_message(bot, mes.chat.id, "Нет аккаунтов")
+
+    bot_mes = await bot.send_message(mes.chat.id, "Отправьте мастер пароль")
+
+    register_state(mes, functools.partial(_export2, bot, engine, bot_mes))
+
+
+async def _export2(
+    bot: AsyncTeleBot, engine: Engine, prev_mes: Message, mes: Message
+) -> None:
+    await base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return await send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    master_password = db.get.get_master_pass(
+        engine,
+        mes.from_user.id,
+    )
+    if not encryption.master_pass.check_master_pass(text, master_password):
+        return await send_tmp_message(
+            bot,
+            mes.chat.id,
+            "Не подходит мастер пароль",
+        )
+
+    accounts = db.get.get_accounts(engine, mes.from_user.id)
+    with ProcessPoolExecutor() as pool:
+        loop = asyncio.get_running_loop()
+        tasks = []
+        for account in accounts:
+            function = functools.partial(
+                encryption.accounts.decrypt,
+                account,
+                text,
+            )
+            tasks.append(loop.run_in_executor(pool, function))
+        accounts = await asyncio.gather(*tasks)
+    json_io = accounts_to_json(accounts)
+    await bot.send_document(
+        mes.chat.id,
+        json_io,
+        reply_markup=markups.deletion_markup(),
+    )
+
+    del text, accounts, json_io
+    gc.collect()
+
+
+async def import_accounts(
+    bot: AsyncTeleBot,
+    engine: Engine,
+    mes: Message,
+) -> None:
+    await base_handler(bot, mes)
+    master_password_from_db = db.get.get_master_pass(
+        engine,
+        mes.from_user.id,
+    )
+
+    if master_password_from_db is None:
+        return await send_tmp_message(bot, mes.chat.id, "Нет мастер пароля")
+
+    bot_mes = await bot.send_message(mes.chat.id, "Отправьте json файл")
+
+    register_state(mes, functools.partial(_import2, bot, engine, bot_mes))
+
+
+async def _import2(
+    bot: AsyncTeleBot, engine: Engine, prev_mes: Message, mes: Message
+) -> None:
+    await base_handler(bot, mes, prev_mes)
+    if mes.text is not None:
+        text = mes.text.strip()
+        if text == "/cancel":
+            return await send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    if mes.document is None:
+        return await send_tmp_message(
+            bot,
+            mes.chat.id,
+            "Вы должны отправить документ",
+        )
+    if mes.document.file_size > 102_400:  # If file size is bigger than 100 MB
+        return await send_tmp_message(
+            bot,
+            mes.chat.id,
+            "Файл слишком большой",
+        )
+
+    file_info = await bot.get_file(mes.document.file_id)
+    downloaded_file = await bot.download_file(file_info.file_path)
+    try:
+        accounts = json_to_accounts(
+            downloaded_file.decode("utf-8"),
+            mes.from_user.id,
+        )
+    except Exception:
+        return await send_tmp_message(
+            bot,
+            mes.chat.id,
+            "Ошибка во время работы с файлом",
+        )
+
+    bot_mes = await bot.send_message(mes.chat.id, "Отправьте мастер пароль")
+    register_state(
+        mes,
+        functools.partial(_import3, bot, engine, bot_mes, accounts),
+    )
+
+
+async def _import3(
+    bot: AsyncTeleBot,
+    engine: Engine,
+    prev_mes: Message,
+    accounts: list[DecryptedAccount],
+    mes: Message,
+) -> None:
+    await base_handler(bot, mes, prev_mes)
+    text = mes.text.strip()
+    if text == "/cancel":
+        return await send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+
+    master_password = db.get.get_master_pass(
+        engine,
+        mes.from_user.id,
+    )
+    if not encryption.master_pass.check_master_pass(text, master_password):
+        return await 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 the tests
+    failed: list[str] = []
+    tasks: list[asyncio.Future[db.models.Account]] = []
+    loop = asyncio.get_running_loop()
+    with ProcessPoolExecutor() as pool:
+        for account in accounts:
+            if not check_account(account):
+                failed.append(account.name)
+                continue
+            function = functools.partial(
+                encryption.accounts.encrypt,
+                account,
+                text,
+            )
+            tasks.append(loop.run_in_executor(pool, function))
+        enc_accounts: list[db.models.Account] = await asyncio.gather(*tasks)
+    results = db.add.add_accounts(engine, enc_accounts)
+
+    failed_accounts = itertools.compress(
+        enc_accounts, (not result for result in results)
+    )
+    failed.extend((account.name for account in failed_accounts))
+
+    if failed:
+        await send_deleteable_message(
+            bot, mes.chat.id, "Не удалось добавить:\n" + "\n".join(failed)
+        )
+    else:
+        await send_tmp_message(bot, mes.chat.id, "Успех")
+
+    del text, mes, accounts, function, tasks, failed_accounts
+    gc.collect()
+
+
+async def gen_password(bot: AsyncTeleBot, mes: Message) -> None:
+    await base_handler(bot, mes)
+    # Generate 10 passwords and put them 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"
+    )
+    await send_deleteable_message(bot, mes.chat.id, text)
+
+
+async def message_handler(bot: AsyncTeleBot, mes: Message) -> None:
+    handler = get_state(mes)
+    if handler is None:
+        await delete_message(bot, mes)
+        if mes.text.strip() == "/cancel":
+            await send_tmp_message(bot, mes.chat.id, "Нет активного действия")
+            return
+        await send_tmp_message(
+            bot,
+            mes.chat.id,
+            "Вы отправили не корректное сообщение",
+        )
+        return
+
+    try:
+        await handler(mes)
+    except Exception:
+        await send_tmp_message(
+            bot,
+            mes.chat.id,
+            "Произошла непредвиденная ошибка",
+        )
+        raise

src/bot/utils.py

@@ -1,102 +0,0 @@
-import io
-import time
-from typing import Self, Type
-
-import pydantic
-import telebot
-from sqlalchemy.future import Engine
-
-from .. import database, cryptography
-
-
-class Account(pydantic.BaseModel):
-    name: str
-    login: str
-    passwd: 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.passwd)
-
-
-class _Accounts(pydantic.BaseModel):
-    accounts: list[Account] = pydantic.Field(default_factory=list)
-
-
-def _accounts_list_to_json(accounts: list[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]
-
-
-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_all_accounts(
-    engine: Engine, user_id: int, master_pass: str
-) -> list[tuple[str, str, str]]:
-    accounts: list[tuple[str, str, str]] = []
-    master_pass = master_pass.encode("utf-8")
-    for account_name in database.get.get_accounts(engine, user_id):
-        salt, enc_login, enc_passwd = database.get.get_account_info(
-            engine, user_id, account_name
-        )
-        login, passwd = cryptography.other_accounts.decrypt_account_info(
-            enc_login, enc_passwd, master_pass, salt
-        )
-        accounts.append((account_name, login, passwd))
-    return accounts
-
-
-def accounts_to_json(accounts: list[tuple[str, str, str]]) -> io.StringIO:
-    file = io.StringIO(_accounts_list_to_json(accounts))
-    file.name = "passwords.json"
-    return file
-
-
-def _base_check(val: str) -> bool:
-    "Returns false if finds new lines or backtick (`)"
-    return not ("\n" in val or "`" 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_passwd(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_passwd(passwd)

src/cryptography/__init__.py

@@ -1,3 +0,0 @@
-from . import master_pass, other_accounts
-
-__all__ = ["master_pass", "other_accounts"]

src/cryptography/master_pass.py

@@ -1,35 +0,0 @@
-import os
-
-from cryptography.exceptions import InvalidKey
-from cryptography.hazmat.primitives.kdf.scrypt import Scrypt
-
-_memory_use = 2**14
-
-
-def _get_kdf(salt: bytes) -> Scrypt:
-    kdf = Scrypt(
-        salt=salt,
-        length=128,
-        n=_memory_use,
-        r=8,
-        p=1,
-    )
-    return kdf
-
-
-def encrypt_master_pass(passwd: str) -> tuple[bytes, bytes]:
-    """Hashes master password and return tuple of hashed password and salt"""
-    salt = os.urandom(64)
-    kdf = _get_kdf(salt)
-    return kdf.derive(passwd.encode("utf-8")), salt
-
-
-def check_master_pass(passwd: str, enc_pass: bytes, salt: bytes) -> bool:
-    """Checks if the master password is correct"""
-    kdf = _get_kdf(salt)
-    try:
-        kdf.verify(passwd.encode("utf-8"), enc_pass)
-    except InvalidKey:
-        return False
-    else:
-        return True

src/cryptography/other_accounts.py

@@ -1,44 +0,0 @@
-import base64
-import os
-
-from cryptography.fernet import Fernet
-from cryptography.hazmat.backends import default_backend
-from cryptography.hazmat.primitives import hashes
-from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
-
-
-def _generate_key(salt: bytes, master_pass: bytes) -> bytes:
-    kdf = PBKDF2HMAC(
-        algorithm=hashes.SHA256(),
-        length=32,
-        salt=salt,
-        iterations=100000,
-        backend=default_backend(),
-    )
-    key = base64.urlsafe_b64encode(kdf.derive(master_pass))
-    return key
-
-
-def encrypt_account_info(
-    login: str, passwd: str, master_pass: bytes
-) -> tuple[bytes, bytes, bytes]:
-    """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)
-    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)
-
-
-def decrypt_account_info(
-    enc_login: bytes, enc_pass: bytes, master_pass: bytes, salt: bytes
-) -> tuple[str, str]:
-    """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)
-    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"))

src/database/add.py

@@ -1,40 +0,0 @@
-import sqlmodel
-from sqlalchemy.exc import IntegrityError
-from sqlalchemy.future import Engine
-
-from . import models
-
-
-def add_account(
-    engine: Engine,
-    user_id: int,
-    name: str,
-    salt: bytes,
-    enc_login: bytes,
-    enc_pass: bytes,
-) -> bool:
-    """Adds account to db. Returns true, if on success"""
-    account = models.Account(
-        user_id=user_id, name=name, salt=salt, enc_login=enc_login, enc_pass=enc_pass
-    )
-    try:
-        with sqlmodel.Session(engine) as session:
-            session.add(account)
-            session.commit()
-    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)
-    try:
-        with sqlmodel.Session(engine) as session:
-            session.add(master_pass)
-            session.commit()
-    except IntegrityError:
-        return False
-    else:
-        return True

src/database/change.py

@@ -1,17 +0,0 @@
-import sqlmodel
-from sqlalchemy.future import Engine
-
-from . import models
-
-
-def change_master_pass(
-    engine: Engine, user_id: int, salt: bytes, passwd: bytes
-) -> None:
-    statement = (
-        sqlmodel.update(models.MasterPass)
-        .where(models.MasterPass.user_id == user_id)
-        .values(salt=salt, passwd=passwd)
-    )
-    with sqlmodel.Session(engine) as session:
-        session.exec(statement)
-        session.commit()

src/database/get.py

@@ -1,38 +0,0 @@
-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"""
-    statement = sqlmodel.select(models.MasterPass).where(
-        models.MasterPass.user_id == user_id
-    )
-    with sqlmodel.Session(engine) as session:
-        result = session.exec(statement).first()
-    if result is None:
-        return
-    return (result.salt, result.passwd)
-
-
-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)
-    with sqlmodel.Session(engine) as session:
-        result = session.exec(statement)
-        return [account.name 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"""
-    statement = sqlmodel.select(models.Account).where(
-        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)

src/database/models.py

@@ -1,32 +0,0 @@
-from typing import Optional
-
-import sqlmodel
-
-
-class MasterPass(sqlmodel.SQLModel, table=True):
-    __tablename__ = "master_passwords"
-    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(sqlmodel.BINARY(64), nullable=False)
-    )
-    passwd: bytes = sqlmodel.Field(
-        sa_column=sqlmodel.Column(sqlmodel.BINARY(128), nullable=False)
-    )
-
-
-class Account(sqlmodel.SQLModel, table=True):
-    __tablename__ = "accounts"
-    __table_args__ = (sqlmodel.UniqueConstraint("user_id", "name"),)
-    id: Optional[int] = sqlmodel.Field(primary_key=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(sqlmodel.BINARY(64), nullable=False)
-    )
-    enc_login: bytes = sqlmodel.Field(
-        sa_column=sqlmodel.Column(sqlmodel.VARBINARY(500), nullable=False)
-    )
-    enc_pass: bytes = sqlmodel.Field(
-        sa_column=sqlmodel.Column(sqlmodel.VARBINARY(500), nullable=False)
-    )

src/database/prepare.py

@@ -1,13 +0,0 @@
-import sqlmodel
-from sqlalchemy.future import Engine
-
-from . import models
-
-
-def get_engine(host: str, user: str, passwd: str, db: str) -> Engine:
-    engine = sqlmodel.create_engine(f"mariadb+pymysql://{user}:{passwd}@{host}/{db}")
-    return engine
-
-
-def prepare(engine: Engine) -> None:
-    sqlmodel.SQLModel.metadata.create_all(engine)

src/db/__init__.py

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

src/db/add.py

@@ -0,0 +1,46 @@
+import sqlmodel
+from sqlalchemy.exc import IntegrityError
+from sqlalchemy.future import Engine
+
+from . import models
+
+
+def _add_model(
+    session: sqlmodel.Session, model: models.Account | models.MasterPass
+) -> bool:
+    """Adds model to the session. Returns true on success,
+    false otherwise"""
+    try:
+        session.add(model)
+    except IntegrityError:
+        return False
+    else:
+        return True
+
+
+def add_account(engine: Engine, account: models.Account) -> bool:
+    """Adds account to the database. Returns true on success,
+    false otherwise"""
+    with sqlmodel.Session(engine) as session:
+        result = _add_model(session, account)
+        session.commit()
+    return result
+
+
+def add_master_pass(engine: Engine, master_pass: models.MasterPass) -> bool:
+    """Adds master password the database. Returns true on success,
+    false otherwise"""
+    with sqlmodel.Session(engine) as session:
+        result = _add_model(session, master_pass)
+        session.commit()
+    return result
+
+
+def add_accounts(
+    engine: Engine,
+    accounts: list[models.Account],
+) -> list[bool]:
+    with sqlmodel.Session(engine) as session:
+        result = [_add_model(session, account) for account in accounts]
+        session.commit()
+    return result

src/db/change.py

@@ -0,0 +1,22 @@
+import sqlmodel
+from sqlalchemy.future import Engine
+
+from . import models
+
+
+def change_master_pass(
+    engine: Engine,
+    master_password: models.MasterPass,
+) -> None:
+    """Changes master password and salt in the database"""
+    statement = (
+        sqlmodel.update(models.MasterPass)
+        .where(models.MasterPass.user_id == master_password.user_id)
+        .values(
+            salt=master_password.salt,
+            password_hash=master_password.password_hash,
+        )
+    )
+    with sqlmodel.Session(engine) as session:
+        session.exec(statement)
+        session.commit()

src/db/delete.py

@@ -5,13 +5,17 @@ from . import models
 
 
 def purge_accounts(engine: Engine, user_id: int) -> None:
-    statement = sqlmodel.delete(models.Account).where(models.Account.user_id == user_id)
+    """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
     )
@@ -21,8 +25,10 @@ def delete_master_pass(engine: Engine, user_id: int) -> None:
 
 
 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
+        models.Account.user_id == user_id,
+        models.Account.name == name,
     )
     with sqlmodel.Session(engine) as session:
         session.exec(statement)

src/db/get.py

@@ -0,0 +1,63 @@
+import sqlmodel
+from sqlalchemy.future import Engine
+
+from . import models
+
+
+def get_master_pass(
+    engine: Engine,
+    user_id: int,
+) -> models.MasterPass | None:
+    """Gets master password of a user"""
+    statement = sqlmodel.select(models.MasterPass).where(
+        models.MasterPass.user_id == user_id,
+    )
+    with sqlmodel.Session(engine) as session:
+        result = session.exec(statement).first()
+    return result
+
+
+def get_account_names(
+    engine: Engine,
+    user_id: int,
+    *,
+    to_sort: bool = False,
+) -> list[str]:
+    """Gets a list of account names of a user"""
+    statement = sqlmodel.select(models.Account.name).where(
+        models.Account.user_id == user_id,
+    )
+    if to_sort:
+        statement = statement.order_by(models.Account.name)
+    with sqlmodel.Session(engine) as session:
+        result = session.exec(statement).fetchall()
+    return result
+
+
+def get_accounts(engine: Engine, user_id: int) -> list[models.Account]:
+    """Returns a list of accounts of a user"""
+    statement = (
+        sqlmodel.select(models.Account)
+        .where(
+            models.Account.user_id == user_id,
+        )
+        .order_by(models.Account.name)
+    )
+    with sqlmodel.Session(engine) as session:
+        result = session.exec(statement).fetchall()
+    return result
+
+
+def get_account_info(
+    engine: Engine,
+    user_id: int,
+    name: str,
+) -> models.Account:
+    """Gets account info"""
+    statement = sqlmodel.select(models.Account).where(
+        models.Account.user_id == user_id,
+        models.Account.name == name,
+    )
+    with sqlmodel.Session(engine) as session:
+        result = session.exec(statement).first()
+    return result

src/db/models.py

@@ -0,0 +1,42 @@
+import sqlmodel
+
+
+class MasterPass(sqlmodel.SQLModel, table=True):
+    __tablename__ = "master_passwords"
+    user_id: int = sqlmodel.Field(
+        sa_column=sqlmodel.Column(
+            sqlmodel.INT(),
+            primary_key=True,
+            autoincrement=False,
+        )
+    )
+    salt: bytes = sqlmodel.Field(
+        sa_column=sqlmodel.Column(sqlmodel.BINARY(64), nullable=False),
+        max_length=64,
+        min_length=64,
+    )
+    password_hash: bytes = sqlmodel.Field(
+        sa_column=sqlmodel.Column(sqlmodel.BINARY(128), nullable=False),
+        max_length=128,
+        min_length=128,
+    )
+
+
+class Account(sqlmodel.SQLModel, table=True):
+    __tablename__ = "accounts"
+    __table_args__ = (sqlmodel.PrimaryKeyConstraint("user_id", "name"),)
+    user_id: int = sqlmodel.Field()
+    name: str = sqlmodel.Field(max_length=256)
+    salt: bytes = sqlmodel.Field(
+        sa_column=sqlmodel.Column(sqlmodel.BINARY(64), nullable=False),
+        max_length=64,
+        min_length=64,
+    )
+    enc_login: bytes = sqlmodel.Field(
+        sa_column=sqlmodel.Column(sqlmodel.VARBINARY(256), nullable=False),
+        max_length=256,
+    )
+    enc_password: bytes = sqlmodel.Field(
+        sa_column=sqlmodel.Column(sqlmodel.VARBINARY(256), nullable=False),
+        max_length=256,
+    )

src/db/prepare.py

@@ -0,0 +1,18 @@
+import sqlmodel
+from sqlalchemy.future import Engine
+
+from . import models  # noqa
+
+HOUR_IN_SECONDS = 3600
+
+
+def get_engine(host: str, user: str, passwd: str, db: str) -> Engine:
+    """Creates an engine for mariadb with pymysql as connector"""
+    uri = f"mariadb+pymysql://{user}:{passwd}@{host}/{db}"
+    engine = sqlmodel.create_engine(uri, pool_recycle=HOUR_IN_SECONDS)
+    return engine
+
+
+def prepare(engine: Engine) -> None:
+    """Creates all tables, indexes and constrains in the database"""
+    sqlmodel.SQLModel.metadata.create_all(engine)

src/decrypted_account.py

@@ -0,0 +1,8 @@
+import pydantic
+
+
+class DecryptedAccount(pydantic.BaseModel):
+    user_id: int
+    name: str
+    login: str
+    password: str

src/encryption/__init__.py

@@ -0,0 +1,3 @@
+from . import accounts, master_pass
+
+__all__ = ["master_pass", "accounts"]

src/encryption/accounts.py

@@ -0,0 +1,79 @@
+import os
+from typing import Self
+
+from cryptography.hazmat.primitives import hashes
+from cryptography.hazmat.primitives.ciphers.aead import ChaCha20Poly1305
+from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
+
+from ..db.models import Account
+from ..decrypted_account import DecryptedAccount
+
+
+class Cipher:
+    def __init__(self, key: bytes) -> None:
+        self._chacha = ChaCha20Poly1305(key)
+
+    @classmethod
+    def generate_cipher(cls, salt: bytes, password: bytes) -> Self:
+        """Generates cipher which uses key derived from a given password"""
+        kdf = PBKDF2HMAC(
+            algorithm=hashes.SHA256(),
+            length=32,
+            salt=salt,
+            iterations=100000,
+        )
+        return cls(kdf.derive(password))
+
+    def encrypt(self, data: bytes) -> bytes:
+        nonce = os.urandom(12)
+        return nonce + self._chacha.encrypt(
+            nonce,
+            data,
+            associated_data=None,
+        )
+
+    def decrypt(self, data: bytes) -> bytes:
+        return self._chacha.decrypt(
+            nonce=data[:12],
+            data=data[12:],
+            associated_data=None,
+        )
+
+
+def encrypt(
+    account: DecryptedAccount,
+    master_pass: str,
+) -> Account:
+    """Encrypts account using master password and returns Account object"""
+    salt = os.urandom(64)
+    cipher = Cipher.generate_cipher(salt, master_pass.encode("utf-8"))
+
+    enc_login = cipher.encrypt(account.login.encode("utf-8"))
+    enc_password = cipher.encrypt(account.password.encode("utf-8"))
+
+    return Account(
+        user_id=account.user_id,
+        name=account.name,
+        salt=salt,
+        enc_login=enc_login,
+        enc_password=enc_password,
+    )
+
+
+def decrypt(
+    account: Account,
+    master_pass: str,
+) -> DecryptedAccount:
+    """Decrypts account using master password and returns
+    DecryptedAccount object"""
+    cipher = Cipher.generate_cipher(account.salt, master_pass.encode("utf-8"))
+
+    login = cipher.decrypt(account.enc_login).decode("utf-8")
+    password = cipher.decrypt(account.enc_password).decode("utf-8")
+
+    return DecryptedAccount(
+        user_id=account.user_id,
+        name=account.name,
+        login=login,
+        password=password,
+    )

src/encryption/master_pass.py

@@ -0,0 +1,42 @@
+import os
+
+from cryptography.exceptions import InvalidKey
+from cryptography.hazmat.primitives.kdf.scrypt import Scrypt
+
+from ..db.models import MasterPass
+
+MEMORY_USAGE = 2**14
+
+
+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(user_id: int, password: str) -> MasterPass:
+    """Hashes master password and returns MasterPass object"""
+    salt = os.urandom(64)
+    kdf = _get_kdf(salt)
+    password_hash = kdf.derive(password.encode("utf-8"))
+    return MasterPass(
+        user_id=user_id,
+        password_hash=password_hash,
+        salt=salt,
+    )
+
+
+def check_master_pass(password: str, master_password: MasterPass) -> bool:
+    """Checks if the master password is correct"""
+    kdf = _get_kdf(master_password.salt)
+    try:
+        kdf.verify(password.encode("utf-8"), master_password.password_hash)
+    except InvalidKey:
+        return False
+    else:
+        return True

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