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# Copyright (c) 2022 Tulir Asokan
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
from __future__ import annotations
import warnings
from mautrix.types import IdentityKey, SessionID
from .base import MatrixError
class CryptoError(MatrixError):
def __init__(self, message: str) -> None:
super().__init__(message)
self.message = message
class EncryptionError(CryptoError):
pass
class SessionShareError(CryptoError):
pass
class DecryptionError(CryptoError):
@property
def human_message(self) -> str:
return "the bridge failed to decrypt the message"
class MatchingSessionDecryptionError(DecryptionError):
pass
class GroupSessionWithheldError(DecryptionError):
def __init__(self, session_id: SessionID, withheld_code: str) -> None:
super().__init__(f"Session ID {session_id} was withheld ({withheld_code})")
self.withheld_code = withheld_code
class SessionNotFound(DecryptionError):
def __init__(self, session_id: SessionID, sender_key: IdentityKey | None = None) -> None:
super().__init__(
f"Failed to decrypt megolm event: no session with given ID {session_id} found"
)
self.session_id = session_id
self._sender_key = sender_key
@property
def human_message(self) -> str:
return "the bridge hasn't received the decryption keys"
@property
def sender_key(self) -> IdentityKey | None:
"""
.. deprecated:: 0.17.0
Matrix v1.3 deprecated the device_id and sender_key fields in megolm events.
"""
warnings.warn(
"The sender_key field in Megolm events was deprecated in Matrix 1.3",
DeprecationWarning,
)
return self._sender_key
class DuplicateMessageIndex(DecryptionError):
def __init__(self) -> None:
super().__init__("Duplicate message index")
class VerificationError(DecryptionError):
def __init__(self) -> None:
super().__init__("Device keys in session and cached device info do not match")
class DecryptedPayloadError(DecryptionError):
pass
class MismatchingRoomError(DecryptionError):
def __init__(self) -> None:
super().__init__("Encrypted megolm event is not intended for this room")
class DeviceValidationError(EncryptionError):
pass
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