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.paul/phases/04-csrf-protection/04-01-SUMMARY.md

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+---
+phase: 04-csrf-protection
+plan: 01
+subsystem: auth
+tags: [csrf, security, session, admin]
+
+requires:
+  - phase: []
+    provides: []
+provides:
+  - "CsrfToken class — token generation, validation, regeneration"
+  - "CSRF protection on all admin FormRequestHandler POSTs"
+  - "CSRF protection on login and 2FA forms"
+  - "Token regeneration after successful login (session fixation prevention)"
+affects: []
+
+tech-stack:
+  added: []
+  patterns: ["CSRF guard before field validation in FormRequestHandler", "bin2hex(random_bytes(32)) per-session token"]
+
+key-files:
+  created:
+    - autoload/Shared/Security/CsrfToken.php
+    - tests/Unit/Shared/Security/CsrfTokenTest.php
+  modified:
+    - autoload/admin/Support/Forms/FormRequestHandler.php
+    - admin/templates/components/form-edit.php
+    - admin/templates/site/unlogged-layout.php
+    - admin/templates/users/user-2fa.php
+    - autoload/admin/App.php
+
+key-decisions:
+  - "Single CSRF validate() call placed before switch($sa) in special_actions() — covers all POST actions uniformly"
+  - "regenerate() called on successful login AND after 2FA verify — both session fixation points"
+
+patterns-established:
+  - "CSRF check = first operation in handleSubmit(), before field validation"
+  - "CsrfToken::getToken() in templates via htmlspecialchars() escape"
+
+duration: ~
+started: 2026-03-12T00:00:00Z
+completed: 2026-03-12T00:00:00Z
+---
+
+# Phase 4 Plan 01: CSRF Protection Summary
+
+**CSRF protection added to entire admin panel — all state-changing POST endpoints now validate a per-session token.**
+
+## Performance
+
+| Metric | Value |
+|--------|-------|
+| Duration | single session |
+| Completed | 2026-03-12 |
+| Tasks | 3 completed |
+| Files modified | 7 |
+
+## Acceptance Criteria Results
+
+| Criterion | Status | Notes |
+|-----------|--------|-------|
+| AC-1: Formularz edycji zawiera _csrf_token | Pass | form-edit.php linia 81 |
+| AC-2: POST bez tokenu odrzucany przez FormRequestHandler | Pass | FormRequestHandler.php linia 36–42 |
+| AC-3: Formularz logowania zawiera _csrf_token | Pass | unlogged-layout.php linia 46 |
+| AC-4: special_actions() waliduje CSRF dla user-logon i 2FA | Pass | App.php linia 47–51, przed switch |
+| AC-5: Token unikalny per sesja, min. 64 znaki hex | Pass | bin2hex(random_bytes(32)) = 64 znaków |
+
+## Accomplishments
+
+- Nowa klasa `\Shared\Security\CsrfToken` z `getToken()`, `validate()`, `regenerate()`
+- Guard w `FormRequestHandler::handleSubmit()` jako pierwsza operacja przed walidacją pól
+- Token w szablonach: `form-edit.php`, `unlogged-layout.php`, `user-2fa.php` (oba formularze)
+- `regenerate()` wywoływany po udanym logowaniu (linia 96) i po weryfikacji 2FA (linia 140) — zapobiega session fixation
+- 6 testów jednostkowych w `CsrfTokenTest.php`
+
+## Task Commits
+
+| Task | Commit | Type | Description |
+|------|--------|------|-------------|
+| Wszystkie 3 taski | `55988887` | security | faza 4 - ochrona CSRF panelu administracyjnego |
+
+## Files Created/Modified
+
+| File | Change | Purpose |
+|------|--------|---------|
+| `autoload/Shared/Security/CsrfToken.php` | Created | Token generation, validation, regeneration |
+| `tests/Unit/Shared/Security/CsrfTokenTest.php` | Created | 6 unit tests dla CsrfToken |
+| `autoload/admin/Support/Forms/FormRequestHandler.php` | Modified | CSRF guard w handleSubmit() |
+| `admin/templates/components/form-edit.php` | Modified | Hidden input _csrf_token |
+| `admin/templates/site/unlogged-layout.php` | Modified | Token w formularzu logowania |
+| `admin/templates/users/user-2fa.php` | Modified | Token w obu formularzach 2FA |
+| `autoload/admin/App.php` | Modified | CSRF walidacja w special_actions() + regenerate() |
+
+## Decisions Made
+
+| Decision | Rationale | Impact |
+|----------|-----------|--------|
+| Jeden blok validate() przed switch($sa) | Pokrywa wszystkie case jednym sprawdzeniem | Prostota, mniej kodu |
+| `\Exception` catch (nie `\Throwable`) | PHP 7.4 compat, wystarczy dla typowych wyjątków | Akceptowalny tradeoff |
+| Logout poza zakresem (GET link) | Zmiana na POST wykracza poza tę fazę | Zostawione do osobnej iteracji |
+
+## Deviations from Plan
+
+Brak — plan wykonany zgodnie ze specyfikacją.
+
+## Next Phase Readiness
+
+**Ready:**
+- Cały admin panel chroniony przed CSRF
+- Wzorzec do replikacji: `CsrfToken::getToken()` w szablonie + `validate()` w handlerze
+
+**Concerns:**
+- `admin/ajax.php` (shop-category, users ajax) jeszcze nie pokryty — odnotowane w planie jako out-of-scope
+
+**Blockers:** None
+
+---
+*Phase: 04-csrf-protection, Plan: 01*
+*Completed: 2026-03-12*