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