src/pqc_mcp_transport/errors.py
| 1 | """Custom exceptions for PQC MCP Transport.""" |
| 2 | |
| 3 | from __future__ import annotations |
| 4 | |
| 5 | |
| 6 | class PQCTransportError(Exception): |
| 7 | """Base exception for all PQC transport errors.""" |
| 8 | |
| 9 | |
| 10 | class SignatureVerificationError(PQCTransportError): |
| 11 | """Raised when a PQC signature fails verification.""" |
| 12 | |
| 13 | |
| 14 | class HandshakeError(PQCTransportError): |
| 15 | """Raised when the PQC handshake fails.""" |
| 16 | |
| 17 | |
| 18 | class SessionExpiredError(PQCTransportError): |
| 19 | """Raised when a PQC session has timed out.""" |
| 20 | |
| 21 | |
| 22 | class ReplayAttackError(PQCTransportError): |
| 23 | """Raised when a nonce has already been used (potential replay attack).""" |
| 24 | |
| 25 | |
| 26 | class PeerNotAuthenticatedError(PQCTransportError): |
| 27 | """Raised when an operation requires an authenticated session but none exists.""" |
| 28 | |