109 lines
3.5 KiB
Python
109 lines
3.5 KiB
Python
from fastapi import FastAPI, WebSocket
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from paskia import db
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from paskia.authsession import get_reset
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from paskia.fastapi import authz, remote
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from paskia.fastapi.session import AUTH_COOKIE, infodict
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from paskia.fastapi.wschat import authenticate_and_login, register_chat
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from paskia.fastapi.wsutil import validate_origin, websocket_error_handler
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from paskia.globals import passkey
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from paskia.util import hostutil, passphrase
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# Create a FastAPI subapp for WebSocket endpoints
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app = FastAPI(docs_url=None, redoc_url=None, openapi_url=None)
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# Mount the remote auth WebSocket endpoints
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app.mount("/remote-auth", remote.app)
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@app.websocket("/register")
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@websocket_error_handler
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async def websocket_register_add(
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ws: WebSocket,
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reset: str | None = None,
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name: str | None = None,
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auth=AUTH_COOKIE,
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):
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"""Register a new credential for an existing user.
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Supports either:
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- Normal session via auth cookie (requires recent authentication)
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- Reset token supplied as ?reset=... (auth cookie ignored)
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"""
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origin = validate_origin(ws)
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host = hostutil.normalize_host(origin.split("://", 1)[1])
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if reset is not None:
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if not passphrase.is_well_formed(reset):
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raise ValueError(
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f"The reset link for {passkey.instance.rp_name} is invalid or has expired"
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)
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s = get_reset(reset)
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user_uuid = s.user_uuid
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else:
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# Require recent authentication for adding a new passkey
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ctx = await authz.verify(auth, perm=[], host=host, max_age="5m")
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user_uuid = ctx.session.user_uuid
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s = ctx.session
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# Get user information and determine effective user_name for this registration
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user = db.data().users[user_uuid]
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user_name = user.display_name
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if name is not None:
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stripped = name.strip()
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if stripped:
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user_name = stripped
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credential_ids = user.credential_ids or None
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# WebAuthn registration
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credential = await register_chat(ws, user_uuid, user_name, origin, credential_ids)
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# Create a new session and store everything in database
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metadata = infodict(ws, "authenticated")
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token = db.create_credential_session(
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user_uuid=user_uuid,
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credential=credential,
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reset_key=(s.key if reset is not None else None),
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display_name=user_name,
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host=host,
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ip=metadata["ip"],
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user_agent=metadata["user_agent"],
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)
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auth = token
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assert isinstance(auth, str) and len(auth) == 16
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await ws.send_json(
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{
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"user": str(user.uuid),
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"credential": str(credential.uuid),
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"session_token": auth,
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"message": "New credential added successfully",
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}
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)
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@app.websocket("/authenticate")
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@websocket_error_handler
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async def websocket_authenticate(ws: WebSocket, auth=AUTH_COOKIE):
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origin = validate_origin(ws)
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host = origin.split("://", 1)[1]
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# If there's an existing session, restrict to that user's credentials (reauth)
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session_user_uuid = None
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if auth:
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existing_ctx = db.data().session_ctx(auth, host)
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if existing_ctx:
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session_user_uuid = existing_ctx.user.uuid
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ctx = await authenticate_and_login(ws, auth)
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# If reauth mode, verify the credential belongs to the session's user
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if session_user_uuid and ctx.user.uuid != session_user_uuid:
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raise ValueError("This passkey belongs to a different account")
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await ws.send_json(
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{
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"user": str(ctx.user.uuid),
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"session_token": ctx.session.key,
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}
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)
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