feat: multi-user auth — per-user spaces, pbkdf2 passwords, session tokens, login page

api/router.py

@@ -1,6 +1,8 @@
 import asyncio
 import os
-from fastapi import APIRouter, WebSocket, WebSocketDisconnect, Depends
+from typing import Optional
+
+from fastapi import APIRouter, WebSocket, WebSocketDisconnect, Depends, HTTPException, Header
 
 from api.state import state, Status
 from config import load as load_config
@@ -11,28 +13,54 @@ _ws_clients: list[WebSocket] = []
 
 
 # ---------------------------------------------------------------------------
-# Auth stub — replaced by auth.py in Task 13.
-# current_user() returns a dict with at least {"username": str, "output_dir": str}.
-# Until auth is wired up, every request runs as an anonymous guest using the
-# global output path from config.
+# Auth dependency
 # ---------------------------------------------------------------------------
 
-def _guest_user() -> dict:
-    cfg = load_config()
-    return {"username": "guest", "output_dir": cfg["output"]["path"]}
-
-
-def current_user(user: dict = Depends(_guest_user)) -> dict:
+async def current_user(authorization: Optional[str] = Header(None)) -> dict:
+    from auth import get_user_for_token
+    token = None
+    if authorization and authorization.startswith("Bearer "):
+        token = authorization[7:]
+    if not token:
+        raise HTTPException(status_code=401, detail="Nicht angemeldet")
+    user = get_user_for_token(token)
+    if not user:
+        raise HTTPException(status_code=401, detail="Ungültiger oder abgelaufener Token")
     return user
 
 
 # ---------------------------------------------------------------------------
-# Endpoints
+# Auth endpoints (no current_user dependency — these are unauthenticated)
+# ---------------------------------------------------------------------------
+
+@router.post("/login")
+async def login(body: dict):
+    from auth import authenticate
+    username = body.get("username", "")
+    password = body.get("password", "")
+    if not username or not password:
+        raise HTTPException(status_code=400, detail="Benutzername und Passwort erforderlich")
+    token = authenticate(username, password)
+    if not token:
+        raise HTTPException(status_code=401, detail="Ungültige Anmeldedaten")
+    return {"token": token, "username": username}
+
+
+@router.post("/logout")
+async def logout(authorization: Optional[str] = Header(None)):
+    from auth import invalidate_token
+    if authorization and authorization.startswith("Bearer "):
+        invalidate_token(authorization[7:])
+    return {"ok": True}
+
+
+# ---------------------------------------------------------------------------
+# Protected endpoints
 # ---------------------------------------------------------------------------
 
 @router.get("/status")
-async def get_status():
-    return {"status": state.status}
+async def get_status(user: dict = Depends(current_user)):
+    return {"status": state.status, "username": user["username"]}
 
 
 @router.post("/toggle")
@@ -46,7 +74,7 @@ async def toggle_recording(user: dict = Depends(current_user)):
         state._recorder = AudioRecorder()
         state._recorder.start()
         state.recording_user = user["username"]
-        state._recording_output_dir = user["output_dir"]
+        state._recording_output_dir = os.path.join(user["output_dir"], user["username"])
         state._recording_instructions = user.get("instructions", "")
         await state.set_status(Status.RECORDING)
         return {"action": "started"}
@@ -55,40 +83,48 @@ async def toggle_recording(user: dict = Depends(current_user)):
 
 @router.post("/instructions")
 async def set_instructions(body: dict, user: dict = Depends(current_user)):
-    # Instructions are per-user; stored on state only for the active recording.
-    # Full per-user persistence comes in Task 13.
     user["instructions"] = body.get("instructions", "")
     return {"ok": True}
 
 
 @router.get("/transcripts")
 async def get_transcripts(user: dict = Depends(current_user)):
-    return list_transcripts(user["output_dir"])
+    user_dir = os.path.join(user["output_dir"], user["username"])
+    return list_transcripts(user_dir)
 
 
 @router.get("/config")
-async def get_config():
+async def get_config(user: dict = Depends(current_user)):
     return load_config()
 
 
 @router.put("/config")
-async def put_config(body: dict):
+async def put_config(body: dict, user: dict = Depends(current_user)):
+    if not user.get("is_admin"):
+        raise HTTPException(status_code=403, detail="Nur Administratoren können die Config ändern")
     cfg = load_config()
     cfg.update(body)
     return cfg
 
 
 @router.post("/open")
-async def open_file(body: dict):
+async def open_file(body: dict, user: dict = Depends(current_user)):
     import subprocess
     path = body.get("path", "")
-    if path and os.path.exists(path):
+    # Only allow opening files within the user's own output directory
+    user_dir = os.path.join(user["output_dir"], user["username"])
+    if path and os.path.exists(path) and os.path.abspath(path).startswith(os.path.abspath(user_dir)):
         subprocess.Popen(["xdg-open", path])
     return {"ok": True}
 
 
 @router.websocket("/ws")
-async def websocket_endpoint(ws: WebSocket):
+async def websocket_endpoint(ws: WebSocket, token: str = ""):
+    from auth import get_user_for_token
+    user = get_user_for_token(token)
+    if not user:
+        await ws.close(code=4001)
+        return
     await ws.accept()
     _ws_clients.append(ws)
     try:

auth.py

@@ -0,0 +1,128 @@
+import getpass
+import hashlib
+import os
+import secrets
+import tomllib
+from typing import Optional
+
+import tomli_w
+
+USERS_PATH = os.path.expanduser("~/.config/tueit-transcriber/users.toml")
+
+# In-memory session store: token → username
+# Users must re-login after server restart — acceptable for a desktop app.
+_sessions: dict[str, str] = {}
+
+
+def _hash_password(password: str) -> str:
+    salt = secrets.token_hex(16)
+    key = hashlib.pbkdf2_hmac("sha256", password.encode(), salt.encode(), 200_000).hex()
+    return f"{salt}:{key}"
+
+
+def _verify_password(password: str, stored: str) -> bool:
+    try:
+        salt, key = stored.split(":", 1)
+    except ValueError:
+        return False
+    new_key = hashlib.pbkdf2_hmac("sha256", password.encode(), salt.encode(), 200_000).hex()
+    return secrets.compare_digest(new_key, key)
+
+
+# ── User store ─────────────────────────────────────────────────────────────────
+
+def has_users() -> bool:
+    return bool(_load_users())
+
+
+def _load_users() -> dict:
+    if not os.path.exists(USERS_PATH):
+        return {}
+    with open(USERS_PATH, "rb") as f:
+        return tomllib.load(f).get("users", {})
+
+
+def _save_users(users: dict):
+    os.makedirs(os.path.dirname(USERS_PATH), exist_ok=True)
+    with open(USERS_PATH, "wb") as f:
+        tomli_w.dump({"users": users}, f)
+
+
+def create_user(username: str, password: str, output_dir: str, is_admin: bool = False):
+    users = _load_users()
+    users[username] = {
+        "password_hash": _hash_password(password),
+        "output_dir": output_dir,
+        "is_admin": is_admin,
+    }
+    _save_users(users)
+
+
+# ── Session management ─────────────────────────────────────────────────────────
+
+def authenticate(username: str, password: str) -> Optional[str]:
+    """Verify credentials. Returns a session token on success, None on failure."""
+    users = _load_users()
+    user = users.get(username)
+    if not user:
+        return None
+    if not _verify_password(password, user["password_hash"]):
+        return None
+    token = secrets.token_urlsafe(32)
+    _sessions[token] = username
+    return token
+
+
+def get_user_for_token(token: str) -> Optional[dict]:
+    """Return user info dict for a valid token, or None."""
+    username = _sessions.get(token)
+    if not username:
+        return None
+    users = _load_users()
+    user = users.get(username)
+    if not user:
+        return None
+    return {
+        "username": username,
+        "output_dir": user["output_dir"],
+        "is_admin": user.get("is_admin", False),
+    }
+
+
+def invalidate_token(token: str):
+    _sessions.pop(token, None)
+
+
+# ── First-run setup wizard ─────────────────────────────────────────────────────
+
+def setup_wizard():
+    """Interactive console setup. Runs when no users exist yet."""
+    print("\n=== tüit Transkriptor — Ersteinrichtung ===\n")
+    print("Bitte richte den ersten Nutzer ein (wird Administrator).\n")
+
+    while True:
+        username = input("Benutzername: ").strip()
+        if username:
+            break
+        print("Benutzername darf nicht leer sein.")
+
+    while True:
+        password = getpass.getpass("Passwort: ")
+        confirm = getpass.getpass("Passwort bestätigen: ")
+        if password != confirm:
+            print("Passwörter stimmen nicht überein.")
+            continue
+        if len(password) < 6:
+            print("Passwort muss mindestens 6 Zeichen lang sein.")
+            continue
+        break
+
+    default_dir = os.path.expanduser(f"~/Transkripte/{username}")
+    answer = input(f"Transkripte speichern unter [{default_dir}]: ").strip()
+    output_dir = answer if answer else default_dir
+
+    create_user(username, password, output_dir, is_admin=True)
+
+    print(f"\nNutzer '{username}' wurde angelegt.")
+    print(f"Transkripte werden gespeichert unter: {output_dir}")
+    print("\nWeitere Nutzer können später über die Web-Oberfläche hinzugefügt werden.\n")

config.py

@@ -21,6 +21,9 @@ DEFAULTS = {
             "~/cloud.shron.de/Hetzner Storagebox/work"
         ),
     },
+    "network": {
+        "host": "127.0.0.1",
+    },
     "pid_file": os.path.expanduser("~/.local/run/tueit-transcriber.pid"),
 }
 

frontend/login.html

@@ -0,0 +1,151 @@
+<!DOCTYPE html>
+<html lang="de">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>tüit Transkriptor — Anmelden</title>
+  <link rel="preconnect" href="https://fonts.googleapis.com">
+  <link href="https://fonts.googleapis.com/css2?family=Overpass:wght@300;400;600;700&display=swap" rel="stylesheet">
+  <style>
+    :root {
+      --red: #DA251C;
+      --yellow: #FFD802;
+      --bg: #111;
+      --surface: #1a1a1a;
+      --surface2: #232323;
+      --text: #e8e8e8;
+      --muted: #888;
+      --border: #2e2e2e;
+    }
+    * { box-sizing: border-box; margin: 0; padding: 0; }
+    body {
+      font-family: 'Overpass', system-ui, sans-serif;
+      background: var(--bg);
+      color: var(--text);
+      min-height: 100vh;
+      display: flex;
+      flex-direction: column;
+      align-items: center;
+      justify-content: center;
+    }
+    .card {
+      background: var(--surface);
+      border: 1px solid var(--border);
+      border-radius: 12px;
+      padding: 40px;
+      width: 100%;
+      max-width: 360px;
+    }
+    .logo {
+      display: flex;
+      align-items: center;
+      gap: 10px;
+      margin-bottom: 32px;
+    }
+    .logo-dot { width: 12px; height: 12px; background: var(--red); border-radius: 50%; flex-shrink: 0; }
+    .logo h1 { font-size: 1.1rem; font-weight: 600; letter-spacing: 0.04em; }
+    .logo h1 span { color: var(--red); }
+    .field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
+    label { font-size: 0.78rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }
+    input {
+      background: var(--surface2);
+      border: 1px solid var(--border);
+      color: var(--text);
+      border-radius: 8px;
+      padding: 10px 12px;
+      font-family: inherit;
+      font-size: 0.95rem;
+      outline: none;
+      transition: border-color 0.15s;
+      width: 100%;
+    }
+    input:focus { border-color: var(--yellow); }
+    input::placeholder { color: var(--muted); }
+    button[type="submit"] {
+      width: 100%;
+      margin-top: 8px;
+      padding: 12px;
+      background: var(--red);
+      color: #fff;
+      border: none;
+      border-radius: 8px;
+      font-family: inherit;
+      font-size: 1rem;
+      font-weight: 600;
+      cursor: pointer;
+      transition: opacity 0.15s;
+    }
+    button[type="submit"]:hover { opacity: 0.88; }
+    button[type="submit"]:disabled { opacity: 0.5; cursor: default; }
+    #error {
+      display: none;
+      margin-top: 14px;
+      padding: 10px 12px;
+      background: rgba(218, 37, 28, 0.12);
+      border: 1px solid rgba(218, 37, 28, 0.4);
+      border-radius: 6px;
+      font-size: 0.85rem;
+      color: #ff6b6b;
+    }
+  </style>
+</head>
+<body>
+  <div class="card">
+    <div class="logo">
+      <div class="logo-dot"></div>
+      <h1>tüit <span>Transkriptor</span></h1>
+    </div>
+    <form id="login-form">
+      <div class="field">
+        <label for="username">Benutzername</label>
+        <input type="text" id="username" name="username" autocomplete="username" autofocus placeholder="Benutzername">
+      </div>
+      <div class="field">
+        <label for="password">Passwort</label>
+        <input type="password" id="password" name="password" autocomplete="current-password" placeholder="Passwort">
+      </div>
+      <button type="submit" id="submit-btn">Anmelden</button>
+      <div id="error"></div>
+    </form>
+  </div>
+  <script>
+    const form = document.getElementById('login-form');
+    const errorEl = document.getElementById('error');
+    const submitBtn = document.getElementById('submit-btn');
+
+    form.addEventListener('submit', async (e) => {
+      e.preventDefault();
+      errorEl.style.display = 'none';
+      submitBtn.disabled = true;
+      submitBtn.textContent = 'Anmelden…';
+
+      // Read values directly — no innerHTML with untrusted data
+      const username = document.getElementById('username').value;
+      const password = document.getElementById('password').value;
+
+      try {
+        const r = await fetch('/login', {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({ username, password }),
+        });
+        if (r.ok) {
+          const data = await r.json();
+          sessionStorage.setItem('token', data.token);
+          location.href = '/';
+        } else {
+          const data = await r.json().catch(() => ({}));
+          errorEl.textContent = data.detail || 'Anmeldung fehlgeschlagen.';
+          errorEl.style.display = 'block';
+        }
+      } catch {
+        errorEl.textContent = 'Server nicht erreichbar.';
+        errorEl.style.display = 'block';
+      } finally {
+        submitBtn.disabled = false;
+        submitBtn.textContent = 'Anmelden';
+      }
+    });
+  </script>
+</body>
+</html>

main.py

@@ -29,6 +29,11 @@ async def index():
     return FileResponse(str(FRONTEND_DIR / "index.html"))
 
 
+@app.get("/login")
+async def login_page():
+    return FileResponse(str(FRONTEND_DIR / "login.html"))
+
+
 @app.get("/app.js")
 async def appjs():
     return FileResponse(str(FRONTEND_DIR / "app.js"))

tests/test_api.py

@@ -1,10 +1,14 @@
 from fastapi.testclient import TestClient
 
+_TEST_USER = {"username": "testuser", "output_dir": "/tmp", "is_admin": False}
+
 
 def make_app():
     from fastapi import FastAPI
-    from api.router import router
+    from api.router import router, current_user
     app = FastAPI()
+    # Override auth for tests — no real credentials needed
+    app.dependency_overrides[current_user] = lambda: _TEST_USER
     app.include_router(router)
     return app
 
@@ -14,6 +18,7 @@ def test_status_returns_idle():
     r = client.get("/status")
     assert r.status_code == 200
     assert r.json()["status"] == "idle"
+    assert r.json()["username"] == "testuser"
 
 
 def test_config_get_returns_dict():
@@ -28,3 +33,28 @@ def test_transcripts_returns_list():
     r = client.get("/transcripts")
     assert r.status_code == 200
     assert isinstance(r.json(), list)
+
+
+def test_status_requires_auth():
+    from fastapi import FastAPI
+    from api.router import router
+    app = FastAPI()
+    app.include_router(router)
+    client = TestClient(app, raise_server_exceptions=False)
+    r = client.get("/status")
+    assert r.status_code == 401
+
+
+def test_login_rejects_wrong_credentials():
+    import tempfile, os
+    from unittest.mock import patch
+    from fastapi import FastAPI
+    from api.router import router
+    app = FastAPI()
+    app.include_router(router)
+    client = TestClient(app, raise_server_exceptions=False)
+    with tempfile.TemporaryDirectory() as tmpdir:
+        users_path = os.path.join(tmpdir, "users.toml")
+        with patch("auth.USERS_PATH", users_path):
+            r = client.post("/login", json={"username": "nobody", "password": "wrong"})
+            assert r.status_code == 401

tests/test_auth.py

@@ -0,0 +1,91 @@
+import importlib
+import os
+import tempfile
+from unittest.mock import patch
+
+
+def _fresh_auth(tmpdir):
+    """Reload auth module with a temp users file and clear sessions."""
+    import auth
+    importlib.reload(auth)
+    auth._sessions.clear()
+    return os.path.join(tmpdir, "users.toml")
+
+
+def test_has_users_false_when_empty():
+    with tempfile.TemporaryDirectory() as tmpdir:
+        import auth
+        importlib.reload(auth)
+        users_path = os.path.join(tmpdir, "users.toml")
+        with patch("auth.USERS_PATH", users_path):
+            assert not auth.has_users()
+
+
+def test_create_and_authenticate():
+    with tempfile.TemporaryDirectory() as tmpdir:
+        import auth
+        importlib.reload(auth)
+        auth._sessions.clear()
+        users_path = os.path.join(tmpdir, "users.toml")
+        with patch("auth.USERS_PATH", users_path):
+            auth.create_user("thomas", "geheim123", "/tmp/transkripte", is_admin=True)
+            token = auth.authenticate("thomas", "geheim123")
+            assert token is not None
+            assert len(token) > 10
+
+
+def test_authenticate_wrong_password():
+    with tempfile.TemporaryDirectory() as tmpdir:
+        import auth
+        importlib.reload(auth)
+        auth._sessions.clear()
+        users_path = os.path.join(tmpdir, "users.toml")
+        with patch("auth.USERS_PATH", users_path):
+            auth.create_user("thomas", "geheim123", "/tmp/transkripte")
+            assert auth.authenticate("thomas", "falsch") is None
+
+
+def test_authenticate_unknown_user():
+    with tempfile.TemporaryDirectory() as tmpdir:
+        import auth
+        importlib.reload(auth)
+        users_path = os.path.join(tmpdir, "users.toml")
+        with patch("auth.USERS_PATH", users_path):
+            assert auth.authenticate("niemand", "irgendwas") is None
+
+
+def test_get_user_for_token():
+    with tempfile.TemporaryDirectory() as tmpdir:
+        import auth
+        importlib.reload(auth)
+        auth._sessions.clear()
+        users_path = os.path.join(tmpdir, "users.toml")
+        with patch("auth.USERS_PATH", users_path):
+            auth.create_user("anna", "secret456", "/tmp/anna")
+            token = auth.authenticate("anna", "secret456")
+            user = auth.get_user_for_token(token)
+            assert user["username"] == "anna"
+            assert user["output_dir"] == "/tmp/anna"
+
+
+def test_invalidate_token():
+    with tempfile.TemporaryDirectory() as tmpdir:
+        import auth
+        importlib.reload(auth)
+        auth._sessions.clear()
+        users_path = os.path.join(tmpdir, "users.toml")
+        with patch("auth.USERS_PATH", users_path):
+            auth.create_user("bob", "pass789!", "/tmp/bob")
+            token = auth.authenticate("bob", "pass789!")
+            auth.invalidate_token(token)
+            assert auth.get_user_for_token(token) is None
+
+
+def test_has_users_true_after_create():
+    with tempfile.TemporaryDirectory() as tmpdir:
+        import auth
+        importlib.reload(auth)
+        users_path = os.path.join(tmpdir, "users.toml")
+        with patch("auth.USERS_PATH", users_path):
+            auth.create_user("lisa", "abc123!", "/tmp/lisa")
+            assert auth.has_users()