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"""
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Core session management for WebAuthn authentication.
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This module provides generic session management functionality that is
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independent of any web framework:
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- Session creation and validation
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- Token handling and refresh
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- Credential management
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"""
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from datetime import datetime, timedelta
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from uuid import UUID
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from passkey.db import Session, db
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from passkey.util import passphrase
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from passkey.util.tokens import create_token, reset_key, session_key
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EXPIRES = timedelta(hours=24)
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def expires() -> datetime:
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return datetime.now() + EXPIRES
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async def create_session(user_uuid: UUID, info: dict, credential_uuid: UUID) -> str:
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"""Create a new session and return a session token."""
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token = create_token()
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await db.instance.create_session(
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user_uuid=user_uuid,
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key=session_key(token),
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expires=datetime.now() + EXPIRES,
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info=info,
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credential_uuid=credential_uuid,
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)
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return token
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async def get_session(token: str, reset_allowed=False) -> Session:
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"""Validate a session token and return session data if valid."""
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if passphrase.is_well_formed(token):
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if not reset_allowed:
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raise ValueError("Reset link is not allowed for this endpoint")
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key = reset_key(token)
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else:
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key = session_key(token)
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session = await db.instance.get_session(key)
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if not session:
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raise ValueError("Invalid or expired session token")
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return session
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async def refresh_session_token(token: str):
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"""Refresh a session extending its expiry."""
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# Get the current session
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s = await db.instance.update_session(
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session_key(token), datetime.now() + EXPIRES, {}
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)
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if not s:
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raise ValueError("Session not found or expired")
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async def delete_credential(credential_uuid: UUID, auth: str):
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"""Delete a specific credential for the current user."""
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s = await get_session(auth)
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await db.instance.delete_credential(credential_uuid, s.user_uuid)
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