148 lines
5.1 KiB
Python
148 lines
5.1 KiB
Python
"""
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Token repository using Redis as backend.
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"""
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from typing import Optional
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from datetime import datetime
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from selfprivacy_api.repositories.tokens.abstract_tokens_repository import (
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AbstractTokensRepository,
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)
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from selfprivacy_api.utils.redis_pool import RedisPool
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from selfprivacy_api.models.tokens.token import Token
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from selfprivacy_api.models.tokens.recovery_key import RecoveryKey
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from selfprivacy_api.models.tokens.new_device_key import NewDeviceKey
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from selfprivacy_api.repositories.tokens.exceptions import TokenNotFound
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TOKENS_PREFIX = "token_repo:tokens:"
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NEW_DEVICE_KEY_REDIS_KEY = "token_repo:new_device_key"
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RECOVERY_KEY_REDIS_KEY = "token_repo:recovery_key"
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class RedisTokensRepository(AbstractTokensRepository):
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"""
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Token repository using Redis as a backend
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"""
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def __init__(self):
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self.connection = RedisPool().get_connection()
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@staticmethod
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def token_key_for_device(device_name: str):
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return TOKENS_PREFIX + str(hash(device_name))
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def get_tokens(self) -> list[Token]:
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"""Get the tokens"""
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r = self.connection
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token_keys = r.keys(TOKENS_PREFIX + "*")
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return [self._token_from_hash(key) for key in token_keys]
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def delete_token(self, input_token: Token) -> None:
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"""Delete the token"""
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r = self.connection
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key = RedisTokensRepository._token_redis_key(input_token)
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if input_token not in self.get_tokens():
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raise TokenNotFound
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r.delete(key)
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def reset(self):
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for token in self.get_tokens():
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self.delete_token(token)
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self.delete_new_device_key()
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r = self.connection
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r.delete(RECOVERY_KEY_REDIS_KEY)
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def get_recovery_key(self) -> Optional[RecoveryKey]:
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"""Get the recovery key"""
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r = self.connection
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if r.exists(RECOVERY_KEY_REDIS_KEY):
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return self._recovery_key_from_hash(RECOVERY_KEY_REDIS_KEY)
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return None
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def create_recovery_key(
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self,
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expiration: Optional[datetime],
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uses_left: Optional[int],
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) -> RecoveryKey:
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"""Create the recovery key"""
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recovery_key = RecoveryKey.generate(expiration=expiration, uses_left=uses_left)
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self._store_model_as_hash(RECOVERY_KEY_REDIS_KEY, recovery_key)
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return recovery_key
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def get_new_device_key(self) -> NewDeviceKey:
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"""Creates and returns the new device key"""
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new_device_key = NewDeviceKey.generate()
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self._store_model_as_hash(NEW_DEVICE_KEY_REDIS_KEY, new_device_key)
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return new_device_key
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def delete_new_device_key(self) -> None:
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"""Delete the new device key"""
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r = self.connection
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r.delete(NEW_DEVICE_KEY_REDIS_KEY)
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@staticmethod
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def _token_redis_key(token: Token) -> str:
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return RedisTokensRepository.token_key_for_device(token.device_name)
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def _store_token(self, new_token: Token):
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"""Store a token directly"""
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key = RedisTokensRepository._token_redis_key(new_token)
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self._store_model_as_hash(key, new_token)
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def _decrement_recovery_token(self):
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"""Decrement recovery key use count by one"""
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if self.is_recovery_key_valid():
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uses_left = self.get_recovery_key().uses_left
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r = self.connection
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r.hset(RECOVERY_KEY_REDIS_KEY, "uses_left", uses_left - 1)
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def _get_stored_new_device_key(self) -> Optional[NewDeviceKey]:
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"""Retrieves new device key that is already stored."""
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return self._new_device_key_from_hash(NEW_DEVICE_KEY_REDIS_KEY)
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@staticmethod
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def _is_date_key(key: str):
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return key in [
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"created_at",
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"expires_at",
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]
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@staticmethod
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def _prepare_model_dict(d: dict):
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date_keys = [key for key in d.keys() if RedisTokensRepository._is_date_key(key)]
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for date in date_keys:
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if d[date] != "None":
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d[date] = datetime.fromisoformat(d[date])
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for key in d.keys():
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if d[key] == "None":
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d[key] = None
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def _model_dict_from_hash(self, redis_key: str) -> Optional[dict]:
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r = self.connection
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if r.exists(redis_key):
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token_dict = r.hgetall(redis_key)
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RedisTokensRepository._prepare_model_dict(token_dict)
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return token_dict
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return None
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def _hash_as_model(self, redis_key: str, model_class):
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token_dict = self._model_dict_from_hash(redis_key)
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if token_dict is not None:
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return model_class(**token_dict)
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return None
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def _token_from_hash(self, redis_key: str) -> Optional[Token]:
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return self._hash_as_model(redis_key, Token)
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def _recovery_key_from_hash(self, redis_key: str) -> Optional[RecoveryKey]:
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return self._hash_as_model(redis_key, RecoveryKey)
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def _new_device_key_from_hash(self, redis_key: str) -> Optional[NewDeviceKey]:
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return self._hash_as_model(redis_key, NewDeviceKey)
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def _store_model_as_hash(self, redis_key, model):
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r = self.connection
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for key, value in model.dict().items():
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if isinstance(value, datetime):
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value = value.isoformat()
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r.hset(redis_key, key, str(value))
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