Renamed columns in tables

MasterPass passwd -> password_hash
Account enc_pass -> enc_password

.dockerignore

@@ -1,5 +1,5 @@
 **/__pycache__
-**/.venv
+**/venv
 **/.classpath
 **/.dockerignore
 **/.env

Dockerfile

@@ -13,13 +13,11 @@ RUN adduser -u 1000 --disabled-password --gecos "" appuser && chown -R appuser /
 
 # Install deps
 RUN apt update && apt full-upgrade -y
-RUN apt install curl gcc g++ -y
-RUN curl -sS https://downloads.mariadb.com/MariaDB/mariadb_repo_setup | bash
-RUN apt install libmariadb3 libmariadb-dev -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
 

requirements-dev.txt

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

requirements.txt

@@ -1,7 +1,6 @@
-bcrypt
 cryptography
-mariadb
+pymysql
 python-dotenv
 pyTelegramBotAPI
 sqlmodel
-pydantic
+pydantic

src/__init__.py

@@ -1,12 +1,24 @@
 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"]
+__all__ = [
-engine: Engine
+    "account_checks",
+    "account_parsing",
+    "bot",
+    "cryptography",
+    "database",
+    "generate_password",
+]
 
 
 def main() -> None:
@@ -16,7 +28,7 @@ def main() -> None:
         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"), engine)  # 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

@@ -1,14 +1,14 @@
 import functools
 
-import mariadb
 import telebot
+from sqlalchemy.future import Engine
 
-from . import handlers, utils
+from . import handlers
 
-__all__ = ["handlers", "utils"]
+__all__ = ["handlers"]
 
 
-def create_bot(token: str, engine: mariadb.Connection) -> telebot.TeleBot:
+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),
@@ -46,4 +46,7 @@ def create_bot(token: str, engine: mariadb.Connection) -> telebot.TeleBot:
     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

@@ -5,47 +5,61 @@ import time
 import telebot
 from sqlalchemy.future import Engine
 
-from .. import cryptography, database
+from .. import cryptography, database, generate_password
-from .utils import (
+from ..account_checks import (
-    accounts_to_json,
+    check_account,
-    base_handler,
     check_account_name,
     check_login,
-    check_passwd,
+    check_password,
-    check_account,
-    get_all_accounts,
-    json_to_accounts,
-    send_tmp_message,
 )
+from ..account_parsing import accounts_to_json, json_to_accounts
 
 Message = telebot.types.Message
 
 
-def get_accounts(
+def _send_tmp_message(
-    bot: telebot.TeleBot, engine: Engine, mes: telebot.types.Message
+    bot: telebot.TeleBot,
+    chat_id: telebot.types.Message,
+    text: str,
+    timeout: int = 5,
 ) -> None:
-    base_handler(bot, mes)
+    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 accounts:
+    if not accounts:
-        accounts = [f"`{account}`" for account in accounts]
+        return _send_tmp_message(bot, mes.chat.id, "У вас нет аккаунтов")
-        return send_tmp_message(
+
-            bot,
+    # Make accounts copyable and escape special chars
-            mes.chat.id,
+    accounts = [f"`{account}`" for account in accounts]
-            "Ваши аккаунты:\n"
+    _send_tmp_message(
-            + "\n".join(accounts)
+        bot,
-            + "\nНажмите на название, чтобы скопировать",
+        mes.chat.id,
-            30,
+        "Ваши аккаунты:\n"
-        )
+        + "\n".join(accounts)
-    send_tmp_message(bot, mes.chat.id, "У вас нет аккаунтов")
+        + "\nНажмите на название, чтобы скопировать",
+        30,
+    )
 
 
-def delete_all(
+def delete_all(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
-    bot: telebot.TeleBot, engine: Engine, mes: telebot.types.Message
+    _base_handler(bot, mes)
-) -> 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",
+        "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)
@@ -55,20 +69,20 @@ def delete_all(
 def _delete_all(
     bot: telebot.TeleBot, engine: Engine, prev_mes: Message, mes: Message
 ) -> None:
-    base_handler(bot, mes, prev_mes)
+    _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)
+        _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")
+        _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)
+    _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")
+        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)
@@ -78,25 +92,26 @@ def set_master_password(bot: telebot.TeleBot, engine: Engine, mes: Message) -> N
 def _set_master_pass2(
     bot: telebot.TeleBot, engine: Engine, prev_mes: Message, mes: Message
 ) -> None:
-    base_handler(bot, mes, prev_mes)
+    _base_handler(bot, mes, prev_mes)
     text = mes.text.strip()
     if text == "/cancel":
-        return send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+        return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
 
-    hash_, salt = cryptography.master_pass.encrypt_master_pass(text)
+    hash_pass, master_salt = cryptography.master_pass.encrypt_master_pass(text)
-    database.add.add_master_pass(engine, mes.from_user.id, salt, hash_)
+    database.add.add_master_pass(engine, mes.from_user.id, master_salt, hash_pass)
-    send_tmp_message(bot, mes.chat.id, "Успех")
+    _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)
+    _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")
+        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",
+        "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)
@@ -106,15 +121,15 @@ def reset_master_pass(bot: telebot.TeleBot, engine: Engine, mes: Message) -> Non
 def _reset_master_pass2(
     bot: telebot.TeleBot, engine: Engine, prev_mes: Message, mes: Message
 ) -> None:
-    base_handler(bot, mes, prev_mes)
+    _base_handler(bot, mes, prev_mes)
     text = mes.text.strip()
     if text == "/cancel":
-        return send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+        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(
+    _send_tmp_message(
         bot, mes.chat.id, "Все ваши аккаунты удалены, а мастер пароль изменён"
     )
     del mes, text
@@ -122,11 +137,11 @@ def _reset_master_pass2(
 
 
 def add_account(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
-    base_handler(bot, mes)
+    _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")
+        return _send_tmp_message(bot, mes.chat.id, "Нет мастер пароля")
 
     bot_mes = bot.send_message(mes.chat.id, "Отправьте название аккаунта")
 
@@ -138,15 +153,15 @@ def add_account(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
 def _add_account2(
     bot: telebot.TeleBot, engine: Engine, prev_mes: Message, mes: Message
 ) -> None:
-    base_handler(bot, mes, prev_mes)
+    _base_handler(bot, mes, prev_mes)
     text = mes.text.strip()
     if text == "/cancel":
-        return send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+        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")
+        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(
+        return _send_tmp_message(
             bot, mes.chat.id, "Аккаунт с таким именем уже существует"
         )
 
@@ -165,12 +180,12 @@ def _add_account3(
     data: dict[str, str],
     mes: Message,
 ) -> None:
-    base_handler(bot, mes, prev_mes)
+    _base_handler(bot, mes, prev_mes)
     text = mes.text.strip()
     if text == "/cancel":
-        return send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+        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")
+        return _send_tmp_message(bot, mes.chat.id, "Не корректный логин")
 
     data["login"] = text
 
@@ -188,12 +203,12 @@ def _add_account4(
     data: dict[str, str],
     mes: Message,
 ) -> None:
-    base_handler(bot, mes, prev_mes)
+    _base_handler(bot, mes, prev_mes)
     text = mes.text.strip()
     if text == "/cancel":
-        return send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+        return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
-    if not check_passwd(text):
+    if not check_password(text):
-        return send_tmp_message(bot, mes.chat.id, "Не корректный пароль")
+        return _send_tmp_message(bot, mes.chat.id, "Не корректный пароль")
 
     data["passwd"] = text
 
@@ -211,26 +226,26 @@ def _add_account5(
     data: dict[str, str],
     mes: Message,
 ) -> None:
-    base_handler(bot, mes, prev_mes)
+    _base_handler(bot, mes, prev_mes)
     text = mes.text.strip()
     if text == "/cancel":
-        return send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+        return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
 
     salt, hash_ = database.get.get_master_pass(engine, mes.from_user.id)
-    if cryptography.master_pass.encrypt_master_pass(text, salt) != hash_:
+    if not cryptography.master_pass.check_master_pass(text, hash_, salt):
-        return send_tmp_message(bot, mes.chat.id, "Не подходит главный пароль")
+        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")
+        login, passwd, text
     )
 
     result = database.add.add_account(
         engine, mes.from_user.id, name, salt, enc_login, enc_pass
     )
 
-    send_tmp_message(
+    _send_tmp_message(
         bot, mes.chat.id, "Успех" if result else "Произошла не предвиденная ошибка"
     )
 
@@ -240,8 +255,13 @@ def _add_account5(
 
 
 def get_account(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
-    base_handler(bot, mes)
+    _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)
     )
@@ -250,13 +270,13 @@ def get_account(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
 def _get_account2(
     bot: telebot.TeleBot, engine: Engine, prev_mes: Message, mes: Message
 ) -> None:
-    base_handler(bot, mes, prev_mes)
+    _base_handler(bot, mes, prev_mes)
     text = mes.text.strip()
     if text == "/cancel":
-        return send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+        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")
+        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(
@@ -267,30 +287,27 @@ def _get_account2(
 def _get_account3(
     bot: telebot.TeleBot, engine: Engine, prev_mes: Message, name: str, mes: Message
 ) -> None:
-    base_handler(bot, mes, prev_mes)
+    _base_handler(bot, mes, prev_mes)
     text = mes.text.strip()
     if text == "/cancel":
-        return send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+        return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
 
-    master_pass = database.get.get_master_pass(engine, mes.from_user.id)
+    master_salt, hash_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")
 
-    master_salt, hash_pass = master_pass
+    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")
-    if cryptography.master_pass.encrypt_master_pass(text, master_salt) != hash_pass:
-        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
+        enc_login, enc_pass, text, salt
     )
-    send_tmp_message(
+    _send_tmp_message(
         bot,
         mes.chat.id,
-        f"Логин:\n`{login}`\nПароль:\n`{passwd}`\nНажмите на логин или пароль, чтобы скопировать",
+        f"Логин:\n`{login}`\nПароль:\n`{passwd}`\nНажмите на логин или пароль, "
+        "чтобы скопировать",
         30,
     )
 
@@ -299,7 +316,12 @@ def _get_account3(
 
 
 def delete_account(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
-    base_handler(bot, mes)
+    _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"
     )
@@ -312,19 +334,19 @@ def delete_account(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
 def _delete_account2(
     bot: telebot.TeleBot, engine: Engine, prev_mes: Message, mes: Message
 ) -> None:
-    base_handler(bot, mes, prev_mes)
+    _base_handler(bot, mes, prev_mes)
     text = mes.text.strip()
     if text == "/cancel":
-        return send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+        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")
+        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")
+    _send_tmp_message(bot, mes.chat.id, "Аккаунт удалён")
 
 
-def help(bot: telebot.TeleBot, mes: telebot.types.Message) -> None:
+def help(bot: telebot.TeleBot, mes: Message) -> None:
     message = """Команды:
 /set_master_pass - установить мастер пароль
 /add_account - создать аккаунт
@@ -336,23 +358,26 @@ def help(bot: telebot.TeleBot, mes: telebot.types.Message) -> None:
 /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"""
+/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:
-    send_tmp_message(bot, mes.chat.id, "Нет активного действия")
+    _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)
+    _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")
+        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")
+        return _send_tmp_message(bot, mes.chat.id, "Нет аккаунтов")
 
     bot_mes = bot.send_message(mes.chat.id, "Отправьте мастер пароль")
 
@@ -364,16 +389,17 @@ def export(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
 def _export2(
     bot: telebot.TeleBot, engine: Engine, prev_mes: Message, mes: Message
 ) -> None:
-    base_handler(bot, mes, prev_mes)
+    _base_handler(bot, mes, prev_mes)
     text = mes.text.strip()
     if text == "/cancel":
-        return send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+        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 cryptography.master_pass.encrypt_master_pass(text, master_salt) != hash_pass:
+    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")
+        return _send_tmp_message(bot, mes.chat.id, "Не подходит мастер пароль")
 
-    accounts = get_all_accounts(engine, mes.from_user.id, text)
+    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)
 
@@ -384,11 +410,11 @@ def _export2(
 
 
 def import_accounts(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
-    base_handler(bot, mes)
+    _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")
+        return _send_tmp_message(bot, mes.chat.id, "Нет мастер пароля")
 
     bot_mes = bot.send_message(mes.chat.id, "Отправьте json файл")
 
@@ -400,21 +426,23 @@ def import_accounts(bot: telebot.TeleBot, engine: Engine, mes: Message) -> None:
 def _import2(
     bot: telebot.TeleBot, engine: Engine, prev_mes: Message, mes: Message
 ) -> None:
-    base_handler(bot, mes, prev_mes)
+    _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")
+            return _send_tmp_message(bot, mes.chat.id, "Успешная отмена")
 
     if mes.document is None:
-        send_tmp_message(bot, mes.chat.id, "Вы должны отправить документ")
+        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:
-        send_tmp_message(bot, mes.chat.id, "Ошибка во время работы с файлом")
+        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(
@@ -429,14 +457,14 @@ def _import3(
     accounts: list[tuple[str, str, str]],
     mes: Message,
 ) -> None:
-    base_handler(bot, mes, prev_mes)
+    _base_handler(bot, mes, prev_mes)
     text = mes.text.strip()
     if text == "/cancel":
-        return send_tmp_message(bot, mes.chat.id, "Успешная отмена")
+        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 cryptography.master_pass.encrypt_master_pass(text, master_salt) != hash_pass:
+    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")
+        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] = []
@@ -446,7 +474,7 @@ def _import3(
             failed.append(name)
             continue
         enc_login, enc_passwd, salt = cryptography.other_accounts.encrypt_account_info(
-            login, passwd, text.encode("utf-8")
+            login, passwd, text
         )
         result = database.add.add_account(
             engine, mes.from_user.id, name, salt, enc_login, enc_passwd
@@ -458,6 +486,18 @@ def _import3(
         mes_text = "Не удалось добавить:\n" + "\n".join(failed)
     else:
         mes_text = "Успех"
-    send_tmp_message(bot, mes.chat.id, mes_text, 10)
+    _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/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/master_pass.py

@@ -1,26 +1,39 @@
-from typing import overload
+import os
 
-import bcrypt
+from cryptography.exceptions import InvalidKey
+from cryptography.hazmat.primitives.kdf.scrypt import Scrypt
+
+MEMORY_USAGE = 2**14
 
 
-@overload
+def _get_kdf(salt: bytes) -> Scrypt:
-def encrypt_master_pass(passwd: str, salt: bytes) -> bytes:
+    kdf = Scrypt(
-    ...
+        salt=salt,
+        length=128,
+        n=MEMORY_USAGE,
+        r=8,
+        p=1,
+    )
+    return kdf
 
 
-@overload
+def encrypt_master_pass(password: str) -> tuple[bytes, bytes]:
-def encrypt_master_pass(passwd: str) -> tuple[bytes, bytes]:
-    ...
-
-
-def encrypt_master_pass(
-    passwd: str, salt: bytes | None = None
-) -> tuple[bytes, bytes] | bytes:
     """Hashes master password and return tuple of hashed password and salt"""
-    if salt is None:
+    salt = os.urandom(64)
-        salt = bcrypt.gensalt()
+    kdf = _get_kdf(salt)
-        gened_salt = True
+    return kdf.derive(password.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:
-        gened_salt = False
+        return True
-    hashed = bcrypt.hashpw(passwd.encode("utf-8"), salt)
-    return (hashed, salt) if gened_salt else hashed

src/cryptography/other_accounts.py

@@ -1,6 +1,6 @@
 import base64
-
+import os
-import bcrypt
+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.
+    """Encrypts login and password of a user using their master
-    Returns a tuple of encrypted login password and salt"""
+    password as a key.
-    salt = bcrypt.gensalt()
+    Returns a tuple of encrypted login, password and salt"""
-    key = _generate_key(salt, master_pass)
+    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_login = base64.urlsafe_b64decode(f.encrypt(login.encode("utf-8")))
-    enc_passwd = f.encrypt(passwd.encode("utf-8"))
+    enc_password = base64.urlsafe_b64decode(f.encrypt(passwd.encode("utf-8")))
-    return (enc_login, enc_passwd, salt)
+    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)
+    login = f.decrypt(base64.urlsafe_b64encode(enc_login)).decode("utf-8")
-    pass_bytes = f.decrypt(enc_pass)
+    password = f.decrypt(base64.urlsafe_b64encode(enc_pass)).decode("utf-8")
-    return (login_bytes.decode("utf-8"), pass_bytes.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/add.py

@@ -11,11 +11,15 @@ 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:
@@ -27,9 +31,18 @@ def add_account(
         return True
 
 
-def add_master_pass(engine: Engine, user_id: int, salt: bytes, passwd: bytes) -> bool:
+def add_master_pass(
-    """Adds master password to db. Returns true, if on success"""
+    engine: Engine,
-    master_pass = models.MasterPass(user_id=user_id, salt=salt, passwd=passwd)
+    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)

src/database/change.py

@@ -5,12 +5,13 @@ from . import models
 
 
 def change_master_pass(
-    engine: Engine, user_id: int, salt: bytes, passwd: bytes
+    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=passwd)
+        .values(salt=salt, passwd=password)
     )
     with sqlmodel.Session(engine) as session:
         session.exec(statement)

src/database/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/database/get.py

@@ -1,38 +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:
+def get_master_pass(
-    """Gets master pass. Returns tuple of salt and password"""
+    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()
     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]
 
 
+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, 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)
+        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(sqlmodel.VARBINARY(255), nullable=False)
+        sa_column=sqlmodel.Column(sqlmodel.BINARY(64), nullable=False)
     )
-    passwd: bytes = sqlmodel.Field(
+    password_hash: bytes = sqlmodel.Field(
-        sa_column=sqlmodel.Column(sqlmodel.VARBINARY(255), nullable=False)
+        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(sqlmodel.VARBINARY(255), nullable=False)
+        sa_column=sqlmodel.Column(sqlmodel.BINARY(64), nullable=False)
     )
     enc_login: bytes = sqlmodel.Field(
-        sa_column=sqlmodel.Column(sqlmodel.VARBINARY(255), nullable=False)
+        sa_column=sqlmodel.Column(sqlmodel.VARBINARY(256), nullable=False)
     )
-    enc_pass: bytes = sqlmodel.Field(
+    enc_password: bytes = sqlmodel.Field(
-        sa_column=sqlmodel.Column(sqlmodel.VARBINARY(255), nullable=False)
+        sa_column=sqlmodel.Column(sqlmodel.VARBINARY(256), nullable=False)
     )

src/database/prepare.py

@@ -5,11 +5,12 @@ from . import models
 
 
 def get_engine(host: str, user: str, passwd: str, db: str) -> Engine:
-    engine = sqlmodel.create_engine(
+    """Creates an engine for mariadb with pymysql as connector"""
-        f"mariadb+mariadbconnector://{user}:{passwd}@{host}/{db}"
+    uri = f"mariadb+pymysql://{user}:{passwd}@{host}/{db}"
-    )
+    engine = sqlmodel.create_engine(uri)
     return engine
 
 
 def prepare(engine: Engine) -> None:
+    """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