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Device cookies handle subsequent auth changes (logout/re-login), but the initial login needs the chain to create grants on each app and link them to device cookies. Dead apps skipped via health check. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
374 lines
13 KiB
Python
374 lines
13 KiB
Python
"""Authentication routes for the account app.
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Account is the OAuth authorization server. Owns magic link login/logout,
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OAuth2 authorize endpoint, grant verification, and SSO logout.
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"""
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from __future__ import annotations
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import secrets
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from datetime import datetime, timezone, timedelta
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from quart import (
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Blueprint,
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request,
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render_template,
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redirect,
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url_for,
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session as qsession,
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g,
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current_app,
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jsonify,
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)
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from sqlalchemy import select, update
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from sqlalchemy.exc import SQLAlchemyError
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from shared.db.session import get_session
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from shared.models import User
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from shared.models.oauth_code import OAuthCode
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from shared.models.oauth_grant import OAuthGrant
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from shared.infrastructure.urls import account_url, app_url
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from shared.infrastructure.cart_identity import current_cart_identity
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from shared.events import emit_activity
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from .services import (
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pop_login_redirect_target,
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store_login_redirect_target,
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send_magic_email,
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find_or_create_user,
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create_magic_link,
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validate_magic_link,
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validate_email,
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)
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SESSION_USER_KEY = "uid"
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ACCOUNT_SESSION_KEY = "account_sid"
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ALLOWED_CLIENTS = {"blog", "market", "cart", "events", "federation"}
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def register(url_prefix="/auth"):
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auth_bp = Blueprint("auth", __name__, url_prefix=url_prefix)
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# --- OAuth2 authorize endpoint -------------------------------------------
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@auth_bp.get("/oauth/authorize")
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@auth_bp.get("/oauth/authorize/")
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async def oauth_authorize():
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client_id = request.args.get("client_id", "")
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redirect_uri = request.args.get("redirect_uri", "")
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state = request.args.get("state", "")
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device_id = request.args.get("device_id", "")
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if client_id not in ALLOWED_CLIENTS:
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return "Invalid client_id", 400
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expected_redirect = app_url(client_id, "/auth/callback")
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if redirect_uri != expected_redirect:
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return "Invalid redirect_uri", 400
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# Not logged in — bounce to magic link login, then back here
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if not g.get("user"):
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authorize_path = request.full_path
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store_login_redirect_target()
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return redirect(url_for("auth.login_form", next=authorize_path))
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# Logged in — create grant + authorization code
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account_sid = qsession.get(ACCOUNT_SESSION_KEY)
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if not account_sid:
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account_sid = secrets.token_urlsafe(32)
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qsession[ACCOUNT_SESSION_KEY] = account_sid
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grant_token = secrets.token_urlsafe(48)
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code = secrets.token_urlsafe(48)
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now = datetime.now(timezone.utc)
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expires = now + timedelta(minutes=5)
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async with get_session() as s:
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async with s.begin():
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grant = OAuthGrant(
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token=grant_token,
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user_id=g.user.id,
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client_id=client_id,
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issuer_session=account_sid,
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device_id=device_id or None,
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)
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s.add(grant)
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oauth_code = OAuthCode(
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code=code,
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user_id=g.user.id,
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client_id=client_id,
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redirect_uri=redirect_uri,
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expires_at=expires,
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grant_token=grant_token,
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)
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s.add(oauth_code)
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sep = "&" if "?" in redirect_uri else "?"
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return redirect(f"{redirect_uri}{sep}code={code}&state={state}")
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# --- Grant verification (internal endpoint) ------------------------------
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@auth_bp.get("/internal/verify-grant")
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async def verify_grant():
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"""Called by client apps to check if a grant is still valid."""
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token = request.args.get("token", "")
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if not token:
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return jsonify({"valid": False}), 200
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async with get_session() as s:
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grant = await s.scalar(
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select(OAuthGrant).where(OAuthGrant.token == token)
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)
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if not grant or grant.revoked_at is not None:
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return jsonify({"valid": False}), 200
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return jsonify({"valid": True}), 200
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@auth_bp.get("/internal/check-device")
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async def check_device():
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"""Called by client apps to check if a device has an active auth.
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Looks up the most recent grant for (device_id, client_id).
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If the grant is active → {active: true}.
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If revoked but user has logged in since → {active: true} (re-auth needed).
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Otherwise → {active: false}.
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"""
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device_id = request.args.get("device_id", "")
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app_name = request.args.get("app", "")
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if not device_id or not app_name:
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return jsonify({"active": False}), 200
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async with get_session() as s:
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# Find the most recent grant for this device + app
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result = await s.execute(
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select(OAuthGrant)
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.where(OAuthGrant.device_id == device_id)
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.where(OAuthGrant.client_id == app_name)
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.order_by(OAuthGrant.created_at.desc())
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.limit(1)
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)
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grant = result.scalar_one_or_none()
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if not grant:
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return jsonify({"active": False}), 200
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# Grant still active
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if grant.revoked_at is None:
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return jsonify({"active": True}), 200
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# Grant revoked — check if user logged in since
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user = await s.get(User, grant.user_id)
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if user and user.last_login_at and user.last_login_at > grant.revoked_at:
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return jsonify({"active": True}), 200
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return jsonify({"active": False}), 200
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# --- Magic link login flow -----------------------------------------------
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@auth_bp.get("/login/")
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async def login_form():
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store_login_redirect_target()
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cross_cart_sid = request.args.get("cart_sid")
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if cross_cart_sid:
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qsession["cart_sid"] = cross_cart_sid
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if g.get("user"):
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redirect_url = pop_login_redirect_target()
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return redirect(redirect_url)
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return await render_template("auth/login.html")
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@auth_bp.post("/start/")
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async def start_login():
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form = await request.form
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email_input = form.get("email") or ""
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is_valid, email = validate_email(email_input)
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if not is_valid:
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return (
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await render_template(
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"auth/login.html",
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error="Please enter a valid email address.",
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email=email_input,
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),
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400,
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)
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user = await find_or_create_user(g.s, email)
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token, expires = await create_magic_link(g.s, user.id)
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from shared.utils import host_url
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magic_url = host_url(url_for("auth.magic", token=token))
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email_error = None
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try:
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await send_magic_email(email, magic_url)
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except Exception as e:
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current_app.logger.error("EMAIL SEND FAILED: %r", e)
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email_error = (
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"We couldn't send the email automatically. "
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"Please try again in a moment."
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)
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return await render_template(
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"auth/check_email.html",
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email=email,
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email_error=email_error,
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)
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@auth_bp.get("/magic/<token>/")
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async def magic(token: str):
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now = datetime.now(timezone.utc)
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user_id: int | None = None
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try:
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async with get_session() as s:
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async with s.begin():
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user, error = await validate_magic_link(s, token)
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if error:
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return (
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await render_template("auth/login.html", error=error),
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400,
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)
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user_id = user.id
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except Exception:
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return (
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await render_template(
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"auth/login.html",
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error="Could not sign you in right now. Please try again.",
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),
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502,
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)
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assert user_id is not None
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ident = current_cart_identity()
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anon_session_id = ident.get("session_id")
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try:
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async with get_session() as s:
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async with s.begin():
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u2 = await s.get(User, user_id)
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if u2:
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u2.last_login_at = now
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if anon_session_id:
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await emit_activity(
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s,
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activity_type="rose:Login",
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actor_uri="internal:system",
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object_type="Person",
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object_data={
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"user_id": user_id,
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"session_id": anon_session_id,
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},
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)
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except SQLAlchemyError:
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current_app.logger.exception(
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"[auth] non-fatal DB update for user_id=%s", user_id
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)
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qsession[SESSION_USER_KEY] = user_id
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# Fresh account session ID for grant tracking
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qsession[ACCOUNT_SESSION_KEY] = secrets.token_urlsafe(32)
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# Propagate login to all client apps via OAuth chain
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redirect_url = pop_login_redirect_target()
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qsession["sso_final"] = redirect_url
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qsession["sso_chain"] = list(ALLOWED_CLIENTS)
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return redirect(url_for("auth.propagate"), 303)
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@auth_bp.get("/propagate")
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@auth_bp.get("/propagate/")
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async def propagate():
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"""Chain through each client app's OAuth login to create grants
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and set device cookies. Dead apps are skipped."""
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import os, aiohttp
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from urllib.parse import quote
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chain = qsession.get("sso_chain", [])
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final = qsession.get("sso_final", account_url("/"))
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if not g.get("user"):
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qsession.pop("sso_chain", None)
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qsession.pop("sso_final", None)
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return redirect(final)
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comeback = account_url("/auth/propagate")
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while chain:
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next_app = chain.pop(0)
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qsession["sso_chain"] = chain
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internal = (os.getenv(f"INTERNAL_URL_{next_app.upper()}") or f"http://{next_app}:8000").rstrip("/")
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try:
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async with aiohttp.ClientSession() as http:
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async with http.head(
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internal,
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timeout=aiohttp.ClientTimeout(total=2),
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allow_redirects=True,
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) as resp:
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if resp.status < 500:
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login = app_url(next_app, f"/auth/login?next={quote(comeback, safe='')}")
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return redirect(login)
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except Exception:
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current_app.logger.warning("[propagate] skipping dead app: %s", next_app)
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continue
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qsession.pop("sso_chain", None)
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qsession.pop("sso_final", None)
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return redirect(final)
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@auth_bp.post("/logout/")
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async def logout():
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# Revoke all grants issued by this account session
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account_sid = qsession.get(ACCOUNT_SESSION_KEY)
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if account_sid:
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try:
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async with get_session() as s:
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async with s.begin():
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await s.execute(
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update(OAuthGrant)
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.where(OAuthGrant.issuer_session == account_sid)
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.where(OAuthGrant.revoked_at.is_(None))
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.values(revoked_at=datetime.now(timezone.utc))
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)
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except SQLAlchemyError:
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current_app.logger.exception("[auth] failed to revoke grants")
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qsession.pop(SESSION_USER_KEY, None)
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qsession.pop(ACCOUNT_SESSION_KEY, None)
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from shared.infrastructure.urls import blog_url
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return redirect(blog_url("/"))
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@auth_bp.get("/sso-logout/")
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async def sso_logout():
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"""SSO logout called by client apps: revoke grants, clear session."""
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account_sid = qsession.get(ACCOUNT_SESSION_KEY)
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if account_sid:
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try:
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async with get_session() as s:
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async with s.begin():
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await s.execute(
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update(OAuthGrant)
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.where(OAuthGrant.issuer_session == account_sid)
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.where(OAuthGrant.revoked_at.is_(None))
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.values(revoked_at=datetime.now(timezone.utc))
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)
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except SQLAlchemyError:
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current_app.logger.exception("[auth] failed to revoke grants")
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qsession.pop(SESSION_USER_KEY, None)
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qsession.pop(ACCOUNT_SESSION_KEY, None)
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from shared.infrastructure.urls import blog_url
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return redirect(blog_url("/"))
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@auth_bp.get("/clear/")
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async def clear():
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"""One-time migration helper: clear all session cookies."""
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qsession.clear()
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resp = redirect(account_url("/"))
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resp.delete_cookie("blog_session", domain=".rose-ash.com", path="/")
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return resp
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return auth_bp
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