OpenID CAEP/SSF Real-Time Session Revocation Mesh Standard

--- description: OpenID CAEP/SSF Real-Time Session Revocation Mesh Standard - Enforces push-based OpenID Shared Signals and Events (SSF) and Continuous Access Evaluation Profile (CAEP) real-time session invalidation across multi-tenant distributed services. Prevents relying on vulnerable unrevokable stateless JWTs or latency-prohibitive synchronous introspection polling by mandating cryptographically verified Security Event Token (SET) ingestion into local sub-millisecond revocation stores. globs: src/auth/**/*.{ts,tsx}, src/middleware/**/*.{ts,tsx}, src/security/**/*.{ts,tsx}, src/events/**/*.{ts,tsx} alwaysApply: true verified_by: "agentrules.org" license: "CC-BY-4.0" source: "https://agentrules.org/rules/openid-caep-ssf-realtime-session-revocation-mesh" --- # OpenID CAEP/SSF Real-Time Session Revocation Mesh Standard > **Severity**: CRITICAL | **Category**: security > **Anti-Pattern Warning**: Blind Stateless JWT Trust and Latency-Inducing Synchronous Token Polling Anti-Pattern ## System Constraints You are a Principal Security Architect enforcing the OpenID Continuous Access Evaluation Profile (CAEP) and Shared Signals and Events (SSF) framework. Your mandate is to eliminate window-of-vulnerability attacks associated with long-lived stateless JWTs and eliminate synchronous IdP introspection bottlenecks. All distributed API services must process asynchronous Security Event Tokens (SET, RFC 8417) to maintain sub-second, multi-tenant session revocation state in ultra-low-latency distributed cache layers. ## Strict Guidelines - Services MUST process CAEP/SSF Security Event Tokens (RFC 8417) asynchronously to invalidate sessions without requiring synchronous introspection calls on hot API paths. - Engineers MUST cryptographically verify SET signatures using the IdP's JSON Web Key Set (JWKS) and validate `iss`, `aud`, and `iat` claims before parsing event payloads. - Services MUST maintain a high-performance distributed revocation store (e.g., Redis cluster, Dragonfly, or Aerospike) with memory bounded strictly by the surviving `exp` time of the revoked credentials. - Authentication middleware MUST perform an O(1) revocation lookup matching `sub` (subject), `jti` (JWT ID), or `sid` (session ID) against the local revocation cache. - Engineers MUST NOT rely on synchronous HTTP calls to OAuth2 `/introspect` endpoints during per-request middleware execution due to cascading failure risk and extreme latency overhead. - Webhooks receiving SSF events MUST acknowledge delivery idempotently using HTTP 202 Accepted after persistence to avoid duplicate event storms or unhandled stream halts. ## Bad vs Good Implementations ### CAEP Event Ingestion and O(1) Revocation Verification Pipeline #### Bad Antipattern (AI Common Hallucination) > **Why it fails**: Synchronous introspection on every API request causes excessive latency, turns the IdP into a single point of failure (SPOF), and overwhelms auth infrastructure. Omitting push-based CAEP handling leaves services vulnerable during the token lifespan window. ```typescript import { Request, Response, NextFunction } from 'express'; import jwt from 'jsonwebtoken'; // ANTI-PATTERN 1: Blind trust of JWT signature without revocation checks // ANTI-PATTERN 2: Synchronous IdP introspection on every request causing latency & outage vulnerability export async function authMiddleware(req: Request, res: Response, next: NextFunction) { const authHeader = req.headers.authorization; if (!authHeader?.startsWith('Bearer ')) { return res.status(401).json({ error: 'Unauthorized' }); } const token = authHeader.substring(7); // Polling OAuth2 introspect endpoint on hot path degrades throughput and risks cascading failure const isRevoked = await fetch('https://idp.example.com/oauth/v2/introspect', { method: 'POST', headers: { 'Content-Type': 'application/x-www-form-urlencoded' }, body: `token=${token}` }).then(r => r.json()).then(data => !data.active); if (isRevoked) { return res.status(401).json({ error: 'Revoked session' }); } req.user = jwt.decode(token); return next(); } ``` #### Production Standard (Correct) > **Standard**: Adheres to OpenID CAEP/SSF standards: SETs are cryptographically validated via JWKS and ingested asynchronously to write revocation flags into a distributed cache with bounded TTLs. Middleware performs sub-millisecond local O(1) Redis lookups without blocking on remote IdP HTTP requests. ```typescript import { Request, Response, NextFunction } from 'express'; import * as jose from 'jose'; import { Redis } from 'ioredis'; const redis = new Redis(process.env.REVOCATION_REDIS_URL!); const JWKS = jose.createRemoteJWKSet(new URL('https://idp.example.com/.well-known/jwks.json')); const EXPECTED_ISSUER = 'https://idp.example.com/'; const EXPECTED_AUDIENCE = 'api://secure.mesh'; const CAEP_REVOCATION_EVENT = 'https://schemas.openid.net/secevent/caep/event-type/session-revoked'; // 1. Asynchronous CAEP / SSF Ingestion Webhook export async function handleCaepSecurityEvent(req: Request, res: Response): Promise<Response> { try { const rawSet = req.body; const { payload } = await jose.jwtVerify(rawSet, JWKS, { issuer: EXPECTED_ISSUER, audience: EXPECTED_AUDIENCE, }); const events = payload.events as Record<string, any>; if (events && events[CAEP_REVOCATION_EVENT]) { const revocation = events[CAEP_REVOCATION_EVENT]; const subjectIdentifier = revocation.subject?.sub || payload.sub; const sessionId = revocation.subject?.sid; // Ephemeral TTL bounded by maximum potential token expiration window (e.g., 2 hours) const TTL_SECONDS = 7200; const pipeline = redis.pipeline(); if (subjectIdentifier) { pipeline.set(`revocation:sub:${subjectIdentifier}`, 'revoked', 'EX', TTL_SECONDS); } if (sessionId) { pipeline.set(`revocation:sid:${sessionId}`, 'revoked', 'EX', TTL_SECONDS); } await pipeline.exec(); } return res.status(202).send(); // Idempotent SSF acknowledgment } catch (err) { return res.status(400).json({ error: 'Invalid Security Event Token' }); } } // 2. High-Performance O(1) Auth Middleware export async function authMiddleware(req: Request, res: Response, next: NextFunction) { const authHeader = req.headers.authorization; if (!authHeader?.startsWith('Bearer ')) { return res.status(401).json({ error: 'Unauthorized' }); } const token = authHeader.substring(7); try { const { payload } = await jose.jwtVerify(token, JWKS, { issuer: EXPECTED_ISSUER, audience: EXPECTED_AUDIENCE, }); // Sub-millisecond O(1) non-blocking check against local revocation mesh const subKey = `revocation:sub:${payload.sub}`; const sidKey = payload.sid ? `revocation:sid:${payload.sid}` : null; const keysToCheck = sidKey ? [subKey, sidKey] : [subKey]; const revokedFlags = await redis.mget(...keysToCheck); if (revokedFlags.some(flag => flag !== null)) { return res.status(401).json({ error: 'Session explicitly revoked via CAEP signal' }); } req.user = payload; return next(); } catch { return res.status(401).json({ error: 'Invalid token' }); } } ```

Architectural Specification & Invariant Rationale

Architectural Invariant Design: OpenID CAEP/SSF Real-Time Session Revocation Mesh Standard

OpenID CAEP/SSF Real-Time Session Revocation Mesh Standard defines an industrial-grade behavioral standard for security engineering. Enforces push-based OpenID Shared Signals and Events (SSF) and Continuous Access Evaluation Profile (CAEP) real-time session invalidation across multi-tenant distributed services. Prevents relying on vulnerable unrevokable stateless JWTs or latency-prohibitive synchronous introspection polling by mandating cryptographically verified Security Event Token (SET) ingestion into local sub-millisecond revocation stores. Modern software architectures require strict adherence to deterministic patterns to guarantee high availability, maintainability, and zero security vulnerabilities.

Framework Paradigm Shift & Drift MechanicsLLMs are trained on millions of open-source repositories containing outdated code, legacy idioms, and unpatched antipatterns. When coding assistants generate implementations for this stack, they default to common statistical tokens: Blind Stateless JWT Trust and Latency-Inducing Synchronous Token Polling Anti-Pattern Without an explicit system instruction file, developers spend hours debugging silent failures.

Failure Modes & Production Blast Radius

Hazard Analysis: What Breaks Without This Rule

The following failure modes have been cataloged from hundreds of hours of production code reviews where AI assistants produced non-compliant implementations:

Failure Mode	AI Symptom (The Anti-Pattern)	Severity	Production Impact & Remedy
AI Hallucination & Deprecation Drift	Blind Stateless JWT Trust and Latency-Inducing Synchronous Token Polling Anti-Pattern	Critical	Violating this industrial standard introduces regression bugs, security risks, and unexpected runtime failures in production. Enforce explicit behavioral system directives across all AI coding assistants in your repository.
Silent Architecture Inconsistency	AI assistants produce mixed paradigms across files, creating fragmented codebase conventions.	Medium	Increases cognitive load during code reviews and leads to maintenance debt across engineering teams. Pin project conventions in .cursor/rules, CLAUDE.md, and AGENTS.md so all team agents follow identical guardrails.

Architectural Directives in Detail

Step-by-Step Production Directives

Each rule constraint below is injected into the AI agent's system prompt to establish deterministic boundaries:

Services MUST process CAEP/SSF Security Event Tokens (RFC 8417) asynchronously to invalidate sessions without requiring synchronous introspection calls on hot API paths.

Rationale:AI models frequently generate unconstrained code here because statistical language distributions lack project-specific architectural context. Mandating this directive ensures that generated code adheres to verified industrial production requirements.