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The Windows Credential Manager allows for up to 256bits passwords. If a password longer than that is attempted to be written, it will throw a BaseException. CURA-7180
60 lines
2.3 KiB
Python
60 lines
2.3 KiB
Python
# Copyright (c) 2021 Ultimaker B.V.
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# Cura is released under the terms of the LGPLv3 or higher.
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from typing import Type, TYPE_CHECKING
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import keyring
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from keyring.backend import KeyringBackend
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from keyring.errors import NoKeyringError, PasswordSetError
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from UM.Logger import Logger
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if TYPE_CHECKING:
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from cura.OAuth2.Models import BaseModel
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class KeyringAttribute:
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"""
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Descriptor for attributes that need to be stored in the keyring. With Fallback behaviour to the preference cfg file
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"""
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def __get__(self, instance: Type["BaseModel"], owner: type) -> str:
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if self._store_secure:
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try:
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return keyring.get_password("cura", self._keyring_name)
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except NoKeyringError:
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self._store_secure = False
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Logger.logException("w", "No keyring backend present")
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return getattr(instance, self._name)
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else:
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return getattr(instance, self._name)
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def __set__(self, instance: Type["BaseModel"], value: str):
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if self._store_secure:
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setattr(instance, self._name, None)
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try:
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keyring.set_password("cura", self._keyring_name, value)
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except PasswordSetError:
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self._store_secure = False
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setattr(instance, self._name, value)
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Logger.logException("w", "Keyring access denied")
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except NoKeyringError:
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self._store_secure = False
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setattr(instance, self._name, value)
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Logger.logException("w", "No keyring backend present")
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except BaseException as e:
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# A BaseException can occur in Windows when the keyring attempts to write a token longer than 256
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# characters in the Windows Credentials Manager.
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self._store_secure = False
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setattr(instance, self._name, value)
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Logger.log("w", "Keyring failed: {}".format(e))
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else:
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setattr(instance, self._name, value)
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def __set_name__(self, owner: type, name: str):
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self._name = "_{}".format(name)
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self._keyring_name = name
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self._store_secure = False
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try:
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self._store_secure = KeyringBackend.viable
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except NoKeyringError:
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Logger.logException("w", "Could not use keyring")
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setattr(owner, self._name, None)
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