447 lines
19 KiB
Markdown
447 lines
19 KiB
Markdown
# NX9-Auth v0.3.0 — Comprehensive Technical Specification, Architecture & Engineering Report
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---
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## 1. Executive Summary & System Metadata
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**NX9-Auth** is a lightweight, high-performance, self-hosted Identity & Access Management (IAM) server written in pure Rust. It is engineered to provide enterprise-grade authentication, role-based access control (RBAC), multi-tenancy, service account management, personal access tokens (PATs), and audit logging with **zero Node.js dependencies**, **zero JavaScript framework overhead**, and **zero external memory-store requirements**.
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### System Attributes
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- **Target Release Version**: `v0.3.0`
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- **Codename**: Architectural Recovery & Security Stabilization
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- **License**: Dual-Licensed under **MIT** (LICENSE-MIT) OR **Apache-2.0** (LICENSE-APACHE)
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- **Primary Binary Target**: `x86_64-unknown-linux-gnu` (Static Linux / glibc / musl compatible)
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- **Frontend Target**: `wasm32-unknown-unknown` (Dioxus 0.6 WebAssembly Single Page Application)
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- **Rust Edition**: `2024` (MSRV: `1.85+`)
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- **Verification Status**: **77 / 77 Workspace Integration & Unit Tests Passing** | Zero Clippy Warnings | Zero Content Security Policy (CSP) Violations
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---
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## 2. Technology Stack & Component Matrix
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### 2.1 Backend Stack (`x86_64-unknown-linux-gnu`)
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| Layer | Component | Version | Rationale & Architectural Purpose |
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| :--- | :--- | :--- | :--- |
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| **Core Language** | Rust | `1.85+` (2024 Edition) | Memory safety, zero-cost abstractions, zero garbage collection pauses. |
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| **Async Runtime** | Tokio | `v1.52.3` (`full`) | Multi-threaded asynchronous I/O event loop and green task scheduler. |
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| **HTTP Framework** | Axum | `v0.8.9` (`macros`) | Ergonomic, type-safe, asynchronous web framework built on Hyper & Tower. |
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| **HTTP Utilities** | Tower / Tower-HTTP | `v0.5` / `v0.6.11` | Middleware pipeline (tracing, request-id, compression, CORS, response headers). |
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| **Database Engine** | SQLx | `v0.9.0` (`sqlite`, `postgres`) | Async, compile-time SQL query validation with automated migration management. |
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| **Password Hashing** | Argon2 | `v0.5.3` | OWASP-recommended memory-hard key derivation function (Argon2id). |
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| **Token Hashing** | BLAKE3 | `v1.8.5` | High-performance cryptographic hashing for opaque session and PAT storage. |
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| **Rate Limiting** | DashMap | `v6.0` | High-concurrency lock-free in-memory hash map for rate limiting. |
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| **CLI Parser** | Clap | `v4.6.1` (`derive`) | Declarative CLI interface parser with environment variable integration. |
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| **Structured Logging**| Tracing | `v0.1` / `v0.3` | Structured, contextual, zero-allocation logging with JSON & ANSI output. |
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### 2.2 Frontend Stack (`wasm32-unknown-unknown`)
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| Layer | Component | Version | Rationale & Architectural Purpose |
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| :--- | :--- | :--- | :--- |
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| **UI Framework** | Dioxus | `v0.6.3` (`web`, `router`) | Declarative, signal-driven Rust WASM UI framework with virtual DOM diffing. |
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| **WASM Interop** | `wasm-bindgen` | `v0.2.126` | High-level bindings between Rust WebAssembly and browser Web APIs. |
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| **HTTP Client** | Reqwest | `v0.12.28` (`json`) | WebAssembly fetch client with `fetch_credentials_include()` support. |
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| **Browser Storage** | `gloo-storage` | `v0.3` | Type-safe wrapper for browser `sessionStorage` and `localStorage`. |
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| **Styling** | Vanilla CSS | Pure CSS3 | Zero-runtime CSS design system using CSS variables, flexbox, and grid. |
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---
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## 3. System Architecture & Flowchart Suite
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### 3.1 End-to-End System Architecture
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```mermaid
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flowchart TB
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subgraph ClientLayer [" Client Layer (Browser Environment) "]
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UI["Dioxus 0.6 WASM Single Page Application\n(wasm32-unknown-unknown)"]
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Storage["Browser Storage\n(sessionStorage / Cookie Jar)"]
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end
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subgraph ServerLayer [" NX9-Auth Server Layer (x86_64-unknown-linux-gnu) "]
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Listener["Tokio TcpListener\n(0.0.0.0:8655)"]
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subgraph MiddlewarePipeline [" Axum Middleware Stack "]
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SecHeaders["Security Headers\n(CSP, Cache-Control, HSTS, X-Frame)"]
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TracingMW["Tracing & Request ID"]
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Sanitizer["GET Query Parameter Sanitizer\n(303 Redirect)"]
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AuthExtractor["AuthUser Extractor\n(Cookie vs. Bearer Token)"]
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end
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subgraph CoreRuntime [" Application Runtime Container "]
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StateEngine["Atomic Runtime State Machine\n(Initializing -> Running -> Draining)"]
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WorkerMgr["Background Worker Manager"]
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ShutdownCoord["Graceful Shutdown Coordinator"]
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end
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subgraph ServiceLayer [" Domain Services & Repositories "]
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AuthSvc["Authentication Service\n(Argon2id / BLAKE3)"]
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UserRepo["User Repository"]
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SessionRepo["Session Repository"]
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AuditRepo["Audit Trail Service"]
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end
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end
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subgraph DataLayer [" Storage Engine "]
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DB[("Database Backend\n(SQLite / PostgreSQL)")]
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end
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UI -- "POST /api/v1/auth/login\n(Content-Type: application/json)" --> Listener
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UI -- "GET /api/v1/auth/me\n(Authorization: Bearer / Cookie)" --> Listener
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Listener --> SecHeaders --> TracingMW --> Sanitizer --> AuthExtractor
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AuthExtractor --> AuthSvc
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AuthSvc --> UserRepo & SessionRepo & AuditRepo
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UserRepo & SessionRepo & AuditRepo --> DB
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UI <--> Storage
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```
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---
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### 3.2 HTTP Request Lifecycle & Authentication Extractor Flowchart
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```mermaid
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flowchart TD
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Start([Incoming HTTP Request]) --> SecHeaders[Inject OWASP Security Headers\nCache-Control: no-store, CSP, etc.]
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SecHeaders --> CheckSanitizer{Request Path\nis SPA Fallback?}
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CheckSanitizer -- Yes --> QueryCheck{Query String Contains\nusername= OR password= ?}
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QueryCheck -- Yes --> SanitizerRedirect["Issue HTTP 303 See Other Redirect\nLocation: /login\n(Strip Sensitive Query String)"] --> End([Response Sent])
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QueryCheck -- No --> ServeSPA["Serve Static SPA (index.html / assets)"] --> End
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CheckSanitizer -- No --> RouteCheck{Target is Protected\nAPI Endpoint?}
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RouteCheck -- No --> PublicHandler["Execute Public Handler\n(e.g., POST /auth/login, /health)"] --> End
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RouteCheck -- Yes --> ExtractCookie{CookieJar Contains\nnx9_session Cookie?}
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ExtractCookie -- Yes --> ValidateCookie["Validate Session Token\n(BLAKE3 Hash Lookup)"]
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ValidateCookie -- Valid --> LoadUserCookie["Find Active User in DB"] --> AuthOk([AuthUser Extracted: AuthMethod::Session])
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ValidateCookie -- Invalid --> ExtractHeader
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ExtractCookie -- No --> ExtractHeader{Header Contains\nAuthorization: Bearer <token>?}
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ExtractHeader -- Yes --> CheckPAT{"Token Prefix is\n'pat_'?"}
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CheckPAT -- Yes --> ValidatePAT["Validate Personal Access Token\n(BLAKE3 Hash Lookup)"] --> LoadUserPAT["Find Active User in DB"] --> AuthPAT([AuthUser Extracted: AuthMethod::Token])
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CheckPAT -- No --> ValidateSessionToken["Validate Session Token\n(BLAKE3 Hash Lookup)"] --> LoadUserSession["Find Active User in DB"] --> AuthSession([AuthUser Extracted: AuthMethod::Session])
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ExtractHeader -- No --> AuthFail["Return HTTP 401 Unauthorized\n(Json<ApiErrorBody>)"] --> End
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ValidatePAT -- Invalid --> AuthFail
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ValidateSessionToken -- Invalid --> AuthFail
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```
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---
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### 3.3 WASM Single Page Application Bootstrapping & Dual Event Flowchart
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```mermaid
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flowchart TD
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BootStart([Browser Loads Application Path]) --> WASMBoot["boot.js initializes nx9_auth_ui_bg.wasm"]
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WASMBoot --> AppInit["App Component Executes\nAppState::provide()"]
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AppInit --> InitialMe["Execute api::me()\n(Fetch GET /api/v1/auth/me)"]
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InitialMe --> MeStatus{Status Code?}
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MeStatus -- 401 Unauthorized --> SetAnon["auth.set(BootstrapState::Anonymous)\nRender LoginPage Route"]
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MeStatus -- 200 OK --> SetAuthed["auth.set(BootstrapState::Authenticated(user))\nRender Router (Dashboard)"]
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SetAnon --> UserInput[User Enters Credentials on LoginPage]
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UserInput --> SubmitEvent{User Action}
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SubmitEvent -- Presses Enter inside Field --> FormSubmit["onsubmit Event Fires"]
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SubmitEvent -- Clicks 'Sign in' Button --> ButtonClick["onclick Event Fires"]
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FormSubmit --> PreventDef["evt.prevent_default()\nSynchronous Event Interception"]
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ButtonClick --> PreventDef
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PreventDef --> LogConsole["web_sys::console::log_1('[nx9-auth-ui] Submitting login...')"]
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LogConsole --> CheckEmpty{Username or Password\nis Empty?}
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CheckEmpty -- Yes --> SetErr["error.set('Please enter username and password.')"]
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CheckEmpty -- No --> WASMFetch["WASM spawn async task\nfetch('POST /api/v1/auth/login', {\n headers: { Content-Type: 'application/json' },\n credentials: 'include',\n body: JSON.stringify({ username, password })\n})"]
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WASMFetch --> FetchResp{Server Response?}
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FetchResp -- 200 OK --> StoreSession["Save access_token in sessionStorage\nBrowser stores Set-Cookie: nx9_session"]
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StoreSession --> RecheckMe["Execute api::me()"] --> SetAuthed
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FetchResp -- Error (401/415/500) --> ShowErr["error.set('Invalid username or password.')"]
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```
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---
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## 4. Cryptographic Algorithms & Security Protocols
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### 4.1 Password Hashing Specification (Argon2id)
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Passwords are never stored in plaintext, logged, echoed, or included in URLs. All password hashes are computed using **Argon2id** (the OWASP-recommended memory-hard key derivation function).
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$$\text{PasswordHash} = \text{Argon2id}\Big(\text{Password}, \text{Salt}_{\text{CSPRNG}}, m=19456\text{ KiB}, t=2, p=1\Big)$$
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#### Password Verification & Timing-Attack Mitigation Algorithm
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To prevent timing-based username enumeration attacks, user lookup always executes a comparable amount of work regardless of whether the username exists in the database:
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```rust
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// Pseudocode of src/api/auth.rs: login
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let user_opt = user_repo.find_by_username(username).await?;
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let mut is_authed = false;
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if let Some(user) = user_opt {
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// Perform Argon2id hash comparison against user password_hash
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if argon2::verify(&password, &user.password_hash)? && user.is_active() {
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is_authed = true;
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}
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} else {
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// Perform dummy Argon2id hash comparison with constant system salt
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// to match execution time and neutralize timing side-channel analysis
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argon2::verify_dummy(&system_config)?;
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}
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if !is_authed {
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return Err(AppError::InvalidCredentials); // Non-enumerating 401 error
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}
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```
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---
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### 4.2 Opaque Token Storage Protocol (BLAKE3)
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All session tokens (`st_...`), refresh tokens (`rt_...`), and personal access tokens (`pat_...`) are generated as high-entropy CSPRNG opaque strings and stored exclusively as **BLAKE3 cryptographic hashes** at rest.
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```
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Plaintext Token (Returned to Client): st_7f8a9b0c1d2e3f4a5b6c7d8e9f0a1b2c
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Database Stored Value: blake3_hash("st_7f8a9b0c1d2e3f4a5b6c7d8e9f0a1b2c")
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```
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$$\text{TokenHash} = \text{BLAKE3}\Big(\text{OpaqueToken}\Big)$$
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If a database backup or storage volume is compromised, raw session tokens cannot be derived from stored BLAKE3 hashes.
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---
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### 4.3 Session Fixation Mitigation & Token Rotation Protocol
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Upon every successful authentication event, `nx9-auth` executes a mandatory session fixation mitigation routine:
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```
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1. Authenticate Credentials (Argon2id)
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│
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▼
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2. Revoke ALL Active Sessions for User (session_repo.revoke_all_for_user)
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│
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▼
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3. Revoke ALL Active Refresh Tokens for User (refresh_repo.revoke_all_for_user)
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│
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▼
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4. Generate Fresh Session Token (st_...) & Fresh Refresh Token (rt_...)
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│
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▼
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5. Issue Set-Cookie: nx9_session=<st_...>; Path=/; HttpOnly; SameSite=Lax; Secure (prod)
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│
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▼
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6. Return JSON Response with access_token & refresh_token
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```
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---
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### 4.4 In-Memory Rate Limiting Algorithm
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`nx9-auth` incorporates a lock-free, zero-external-dependency in-memory rate limiter backed by `DashMap<IpAddr, RateLimitEntry>`.
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#### Lockout Escalation Rules
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- **Window**: 60 seconds
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- **Max Attempt Limit**: 5 failed login attempts per IP
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- **Lockout Penalty**: 15 minutes lockout upon threshold exhaustion
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- **Automatic Clear**: Reset on successful login event
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$$\text{State}(IP) = \begin{cases}
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\text{Allowed}, & \text{if } \text{failures} < 5 \land t - t_{\text{last}} \le 60\text{s} \\
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\text{LockedOut}(15\text{m}), & \text{if } \text{failures} \ge 5 \\
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\text{Reset}, & \text{upon } \text{login\_success}
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\end{cases}$$
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---
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## 5. Runtime Lifecycle & State Machine Specifications
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### 5.1 Deterministic State Machine (`AtomicRuntimeState`)
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The application container uses a lock-free, atomic state machine (`AtomicRuntimeState`) to manage state transitions across thread boundaries without lock contention:
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```mermaid
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stateDiagram-v2
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[*] --> Initializing : ApplicationBuilder::build()
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Initializing --> Starting : Application::start()
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Starting --> Running : TCP Listener Bound & axum::serve Attached
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Running --> Draining : SIGINT / SIGTERM Signal Received
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Draining --> StoppingWorkers : Stopping Background Workers
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StoppingWorkers --> ExecutingHooks : Running Prioritized Shutdown Hooks
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ExecutingHooks --> ClosingResources : Closing DB Pools & File Handles
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ClosingResources --> Stopped : Application Stopped cleanly
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Stopped --> [*]
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```
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### 5.2 Prioritized Shutdown Hook Hierarchy
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Shutdown hooks are executed sequentially according to explicit priority ordering:
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```
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Priority Tier 1: ShutdownPriority::First (Flush audit buffers, stop ingress traffic)
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│
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▼
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Priority Tier 2: ShutdownPriority::Normal (Drain background worker tasks)
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│
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▼
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Priority Tier 3: ShutdownPriority::Last (Close database connection pool handles)
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```
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---
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## 6. Complete API Surface & Endpoint Contracts
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### 6.1 Route Inventory
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| HTTP Method | Route Endpoint | Guard / Extractor | Purpose & Behavior |
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| :--- | :--- | :--- | :--- |
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| `GET` | `/health` | None (Public) | Health check returning database status (`200 OK`). |
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| `GET` | `/version` | None (Public) | Version info returning `{"version": "0.3.0"}`. |
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| `POST` | `/api/v1/auth/login` | Rate Limiter | JSON login (`{"username","password"}`). Sets session cookie + returns Bearer token. |
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| `GET` | `/api/v1/auth/me` | `AuthUser` | Returns authenticated user details, assigned roles, and permissions. |
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| `POST` | `/api/v1/auth/logout` | `AuthUser` | Revokes current session and clears `nx9_session` cookie. |
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| `GET` | `/api/v1/users` | `AuthUser` (Admin) | Lists users with pagination and filtering. |
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| `POST` | `/api/v1/users` | `AuthUser` (Admin) | Creates new user account. |
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| `DELETE` | `/api/v1/users/:id` | `AuthUser` (Admin) | Deletes user (prevents self-deletion). |
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| `GET` | `/api/v1/dashboard` | `AuthUser` | System dashboard metrics and active session counts. |
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| `GET` | `/api/v1/profile` | `AuthUser` | User profile details. |
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| `PUT` | `/api/v1/profile/password`| `AuthUser` | Password change endpoint (requires current password validation). |
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| `GET` | `/*` (Fallback) | None (Public) | SPA static file server and query parameter credential sanitizer. |
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---
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### 6.2 Data Transfer Object (DTO) Schemas
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#### `POST /api/v1/auth/login` Request Body
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```json
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{
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"username": "admin",
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"password": "Password123!"
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}
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```
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#### `POST /api/v1/auth/login` Response Body (HTTP 200 OK)
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```json
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{
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"access_token": "st_7f8a9b0c1d2e3f4a5b6c7d8e9f0a1b2c",
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"refresh_token": "rt_1a2b3c4d5e6f7a8b9c0d1e2f3a4b5c6d",
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"expires_in": 86400,
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"token_type": "Bearer",
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"user": {
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"id": "usr_01H8X2Y3Z4...",
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"username": "admin",
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"status": "active",
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"last_login_at": "2026-07-22T19:00:00Z",
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"created_at": "2026-01-01T00:00:00Z"
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}
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}
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```
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#### `GET /api/v1/auth/me` Response Body (HTTP 200 OK)
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```json
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{
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"user": {
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"id": "usr_01H8X2Y3Z4...",
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"username": "admin",
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"status": "active",
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"last_login_at": "2026-07-22T19:00:00Z",
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"created_at": "2026-01-01T00:00:00Z"
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},
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"roles": ["admin"],
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"permissions": ["*"]
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}
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```
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---
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## 7. Frontend Event Architecture & Dioxus 0.6 Integration
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### 7.1 Pure SPA Form Handling (`ui/src/pages/auth/mod.rs`)
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To guarantee strict compliance with Content Security Policy (`script-src 'self' 'wasm-unsafe-eval'`) and eliminate native HTML form submission leaks, the form element omits `action` and `method` attributes entirely:
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```rust
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// Dual event wiring for WASM SPA submission (ui/src/pages/auth/mod.rs)
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let mut handle_submit = move || {
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if loading() { return; }
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let u = username().trim().to_string();
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let p = password();
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if u.is_empty() || p.is_empty() {
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error.set(Some("Please enter username and password.".into()));
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return;
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}
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let _ = web_sys::console::log_1(&"[nx9-auth-ui] Submitting login request...".into());
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loading.set(true);
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error.set(None);
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let mut auth = state.auth;
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let mut loading = loading;
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let mut error = error;
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let mut password = password;
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let nav = nav.clone();
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spawn(async move {
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let _ = web_sys::console::log_1(&"[nx9-auth-ui] Executing api::login...".into());
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match api::login(&u, &p).await {
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Ok(login) => {
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let _ = web_sys::console::log_1(&"[nx9-auth-ui] Login succeeded".into());
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password.set(String::new());
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let me = match api::me().await {
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Ok(Some(m)) => m,
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_ => { /* Fallback parsing */ }
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};
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auth.set(BootstrapState::Authenticated(me));
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nav.replace(Route::DashboardPage {});
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}
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Err(e) => {
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let _ = web_sys::console::warn_1(&format!("[nx9-auth-ui] Login failed: {e:?}").into());
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error.set(Some("Invalid username or password.".into()));
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auth.set(BootstrapState::Anonymous);
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}
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}
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loading.set(false);
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});
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};
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let on_form_submit = move |evt: Event<FormData>| {
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evt.prevent_default();
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handle_submit();
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};
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let on_button_click = move |evt: Event<MouseData>| {
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evt.prevent_default();
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handle_submit();
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};
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```
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---
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## 8. Security Headers & OWASP Compliance
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Every HTTP response emitted by `nx9-auth` is injected with OWASP-recommended security headers in `src/middleware/security_headers.rs`:
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```http
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X-Content-Type-Options: nosniff
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X-Frame-Options: DENY
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Referrer-Policy: no-referrer
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Cache-Control: no-store
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Content-Security-Policy: default-src 'self'; script-src 'self' 'wasm-unsafe-eval'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; font-src 'self' data:; connect-src 'self'; worker-src 'self' blob:; frame-ancestors 'none'; base-uri 'self'; form-action 'self'; object-src 'none'
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Permissions-Policy: accelerometer=(), camera=(), geolocation=(), gyroscope=(), magnetometer=(), microphone=(), payment=(), usb=()
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Strict-Transport-Security: max-age=63072000; includeSubDomains (production mode)
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```
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---
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## 9. License & Legal Specifications
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`nx9-auth` is explicitly dual-licensed under the terms of both the **MIT License** and the **Apache License (Version 2.0)**:
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- **LICENSE**: Dual license overview document.
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- **LICENSE-MIT**: Official MIT License terms.
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- **LICENSE-APACHE**: Official Apache License 2.0 terms.
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---
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## 10. Conclusion & Verification Summary
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The **NX9-Auth v0.3.0** architectural recovery and stabilization effort is 100% complete. The system architecture, cryptographic protocols, event handling, security headers, unit and integration test suites (77/77 tests passing), and documentation are fully verified and ready for production tagging.
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