From 9e2d843e199031d62a7742eb4c91f3d66f79aabc Mon Sep 17 00:00:00 2001
From: Leopoldadmin <leopold.hammerschmidt@media-on.de>
Date: Wed, 3 Jun 2026 23:52:04 +0000
Subject: [PATCH] Upload tests/test_frontend_security.py

---
 tests/test_frontend_security.py | 177 ++++++++++++++++++++++++++++++++
 1 file changed, 177 insertions(+)
 create mode 100644 tests/test_frontend_security.py

diff --git a/tests/test_frontend_security.py b/tests/test_frontend_security.py
new file mode 100644
index 0000000..2532a7b
--- /dev/null
+++ b/tests/test_frontend_security.py
@@ -0,0 +1,177 @@
+"""Frontend-Security Tests: XSS-mitigation, JWT-handling, CSP-middleware.
+
+These tests enforce the rules from architecture Section 13 + task graph R-5:
+
+  - R-5:  No `x-html` attribute anywhere in any HTML template (only x-text).
+  - R-1:  JWT must be read from / written to localStorage (not cookies, not sessionStorage).
+  - 13.3:  CSP-Header is configured in app/main.py (security_headers_middleware),
+          not in a reverse-proxy config file.
+"""
+
+from __future__ import annotations
+
+import re
+from pathlib import Path
+
+import pytest
+
+ROOT = Path(__file__).resolve().parent.parent
+WEBUI = ROOT / "app" / "webui"
+MAIN_PY = ROOT / "app" / "main.py"
+
+
+# ---------------------------------------------------------------------------
+# R-5: no x-html in any HTML template
+# ---------------------------------------------------------------------------
+
+# Match `x-html` as a whole word (attribute, not part of `x-htmlSomething`).
+# We deliberately allow `x-html="..."` to fail loudly, and we also catch
+# any camel-cased variant like `xHtml` for paranoia.
+XHTML_PATTERN = re.compile(r"\bx[-_]?html\b", re.IGNORECASE)
+
+
+def _all_html_files() -> list[Path]:
+    return sorted(WEBUI.glob("*.html"))
+
+
+def test_no_x_html_in_alpine_templates():
+    """R-5: no `x-html` attribute anywhere in any HTML file."""
+    offenders: list[tuple[str, int, str]] = []
+    for path in _all_html_files():
+        for lineno, line in enumerate(path.read_text(encoding="utf-8").splitlines(), 1):
+            # Strip HTML comments to avoid false positives in documentation
+            stripped = re.sub(r"<!--.*?-->", "", line)
+            if XHTML_PATTERN.search(stripped):
+                offenders.append((path.name, lineno, line.strip()[:120]))
+    assert not offenders, (
+        "x-html usage is forbidden (R-5); offenders:\n"
+        + "\n".join(f"  {n}:{ln}: {snippet}" for n, ln, snippet in offenders)
+    )
+
+
+def test_no_innerHTML_in_alpine_pages():
+    """Defence in depth: also flag direct `innerHTML` assignments."""
+    for path in _all_html_files():
+        content = path.read_text(encoding="utf-8")
+        # allow within <script> blocks only if commented out / disabled
+        assert "innerHTML" not in content, \
+            f"{path.name} contains innerHTML which is forbidden (R-5)"
+
+
+def test_x_text_is_used_instead():
+    """Sanity check: the auth/dashboard pages use x-text for user-derived strings."""
+    index = (WEBUI / "index.html").read_text(encoding="utf-8")
+    # The error message div should use x-text (so user input never gets HTML-parsed)
+    assert "x-text=\"error\"" in index or 'x-text="error"' in index
+
+
+# ---------------------------------------------------------------------------
+# R-1: JWT in localStorage
+# ---------------------------------------------------------------------------
+
+def test_jwt_uses_localStorage():
+    """api.js must read/write the JWT in localStorage, not cookies/sessionStorage."""
+    api = (WEBUI / "js" / "api.js").read_text(encoding="utf-8")
+    # Must read the token from localStorage
+    assert "localStorage.getItem('jwt')" in api
+    # Must persist the token back to localStorage on login
+    assert "localStorage.setItem('jwt'" in api
+    # Must clear on logout
+    assert "localStorage.removeItem('jwt')" in api
+
+
+def test_jwt_not_in_sessionStorage():
+    """Defence in depth: do NOT use sessionStorage for the JWT."""
+    api = (WEBUI / "js" / "api.js").read_text(encoding="utf-8")
+    assert "sessionStorage" not in api, "api.js must not use sessionStorage for the JWT"
+
+
+def test_jwt_not_in_cookies():
+    """Defence in depth: do NOT put the JWT in document.cookie."""
+    for js in WEBUI.rglob("*.js"):
+        content = js.read_text(encoding="utf-8")
+        assert "document.cookie" not in content, \
+            f"{js.relative_to(ROOT)} must not use document.cookie for the JWT"
+
+
+# ---------------------------------------------------------------------------
+# 13.3: CSP-Header in main.py
+# ---------------------------------------------------------------------------
+
+def test_csp_header_in_main_py():
+    """app/main.py must wire up a middleware (or response-header decorator)
+    that sets Content-Security-Policy. We don't run the server here — we
+    just verify the configuration is present in code."""
+    assert MAIN_PY.exists(), f"Missing {MAIN_PY}"
+    content = MAIN_PY.read_text(encoding="utf-8")
+    # The middleware / decorator must mention the CSP header value
+    assert "Content-Security-Policy" in content, \
+        "app/main.py does not set Content-Security-Policy"
+    # The header must allow the Tailwind CDN at minimum
+    assert "cdn.tailwindcss.com" in content, \
+        "CSP-Header must allow https://cdn.tailwindcss.com in script-src"
+    # And block scripts from arbitrary origins
+    assert "default-src 'self'" in content or 'default-src "self"' in content, \
+        "CSP-Header must set default-src 'self'"
+
+
+def test_csp_blocks_object_embedding():
+    """object-src 'none' is part of the agreed lockdown."""
+    content = MAIN_PY.read_text(encoding="utf-8")
+    assert "object-src 'none'" in content, \
+        "CSP-Header must set object-src 'none'"
+
+
+def test_csp_uses_starlette_middleware():
+    """Per architecture: CSP is set in a FastAPI/Starlette middleware,
+    not in nginx / a response handler."""
+    content = MAIN_PY.read_text(encoding="utf-8")
+    assert "@app.middleware(\"http\")" in content or '@app.middleware("http")' in content, \
+        "CSP-Header must be set in an @app.middleware(\"http\") decorator"
+
+
+# ---------------------------------------------------------------------------
+# Auth-gate on protected pages
+# ---------------------------------------------------------------------------
+
+PROTECTED_PAGES = [
+    "accounts.html",
+    "accounts-detail.html",
+    "contacts.html",
+    "contacts-detail.html",
+    "pipeline.html",
+    "activities.html",
+    "settings-profile.html",
+    "settings-users.html",
+    "settings-org.html",
+    "app.html",
+]
+
+
+@pytest.mark.parametrize("filename", PROTECTED_PAGES)
+def test_protected_page_has_auth_gate(filename):
+    """Each non-public page must call Alpine.store('auth').init() in its
+    outermost x-data, which acts as the auth-gate."""
+    content = (WEBUI / filename).read_text(encoding="utf-8")
+    # The auth-gate is `x-data="{ init: () => Alpine.store('auth').init() }"`
+    # or `x-init="init()"` on a component that checks the JWT.
+    assert "Alpine.store('auth').init()" in content or \
+           "$store.auth.init()" in content, \
+        f"{filename} has no Alpine.store('auth').init() auth-gate"
+
+
+def test_index_page_has_no_auth_gate():
+    """index.html is the LOGIN page itself — it must NOT redirect to itself."""
+    content = (WEBUI / "index.html").read_text(encoding="utf-8")
+    # The auth store's init() redirects to /index.html when no JWT exists,
+    # so it must NOT be called from the login page.
+    assert "Alpine.store('auth').init()" not in content, \
+        "index.html (login page) must not call auth.init() (would cause loop)"
+
+
+def test_404_page_has_no_auth_gate():
+    """404 page is reachable without auth (so users can find their way back)."""
+    content = (WEBUI / "404.html").read_text(encoding="utf-8")
+    # The 404 must not call auth.init() — it is intentionally public.
+    assert "Alpine.store('auth').init()" not in content, \
+        "404.html must not call auth.init() (public page)"