diff --git a/build/Dockerfile b/build/Dockerfile index c85c3b9..45bd809 100644 --- a/build/Dockerfile +++ b/build/Dockerfile @@ -13,9 +13,9 @@ WORKDIR /src # Version stamped into both binaries; MUST match the image tag (spec 7.5.A). ARG VERSION=dev -# Module metadata first for layer caching. No go.sum yet — Phase 1 has no -# third-party dependencies. -COPY go.mod ./ +# Module metadata first for layer caching. go.sum arrived in Phase 2 with the +# SQLite driver and bcrypt. +COPY go.mod go.sum ./ RUN go mod download COPY cmd ./cmd @@ -69,11 +69,13 @@ COPY --from=build /out/selfpost-backup /usr/local/bin/selfpost-backup COPY build/opendkim.conf /etc/opendkim.conf COPY build/postfix-wrapper.sh /usr/local/bin/postfix-wrapper.sh COPY build/crashexit.py /usr/local/bin/crashexit.py +COPY build/entrypoint.sh /usr/local/bin/entrypoint.sh COPY build/supervisord.conf /etc/supervisor/supervisord.conf -RUN chmod +x /usr/local/bin/postfix-wrapper.sh /usr/local/bin/crashexit.py +RUN chmod +x /usr/local/bin/postfix-wrapper.sh /usr/local/bin/crashexit.py /usr/local/bin/entrypoint.sh # 8080 panel; 25 outbound; 465/587 inbound submission (used from Phase 5). EXPOSE 8080 25 465 587 -# supervisord is PID 1 and owns process supervision + ordering (spec 4). -CMD ["/usr/bin/supervisord", "-c", "/etc/supervisor/supervisord.conf"] +# The entrypoint fixes /data ownership (bind mount) as root, then execs +# supervisord, which becomes PID 1 and owns process supervision (spec 4). +ENTRYPOINT ["/usr/local/bin/entrypoint.sh"] diff --git a/build/entrypoint.sh b/build/entrypoint.sh new file mode 100644 index 0000000..b9d14ee --- /dev/null +++ b/build/entrypoint.sh @@ -0,0 +1,17 @@ +#!/bin/sh +# Container entrypoint (runs as root, PID 1 until it execs supervisord). +# +# The persistent root /data is a host bind mount (spec 9), so it arrives owned +# by the host user (typically root), not by the unprivileged panel user that +# actually writes the SQLite database, setup token and DKIM keys (spec 7.6.8). +# Fix its ownership here — the one place still running as root — before handing +# off to supervisord, which starts the panel as the panel user. +set -e + +chown panel:panel /data +# Restored backups or previously-created state may contain panel-owned files +# under /data; make sure they stay writable without disturbing anything that a +# later phase deliberately hands to another service. +find /data -mindepth 1 -maxdepth 1 ! -user panel -exec chown -R panel:panel {} + + +exec /usr/bin/supervisord -c /etc/supervisor/supervisord.conf diff --git a/cmd/panel/httpserver.go b/cmd/panel/httpserver.go index 8e55203..4c6672e 100644 --- a/cmd/panel/httpserver.go +++ b/cmd/panel/httpserver.go @@ -6,19 +6,35 @@ import ( "log" "net/http" "time" + + "codeberg.org/mix/selfpost/internal/store" + "codeberg.org/mix/selfpost/internal/web" ) -// serveHTTP runs the panel's HTTP server until ctx is cancelled. Phase 1 serves -// only a placeholder page and a health check; the login flow and real UI arrive -// in Phase 2. -func serveHTTP(ctx context.Context, addr string) error { - mux := http.NewServeMux() - mux.HandleFunc("/healthz", handleHealth) - mux.HandleFunc("/", handleIndex) +// serveHTTP opens the panel database and runs the control-panel HTTP server +// until ctx is cancelled. From Phase 2 this serves the real setup, login and +// authenticated panel surface (spec 7.6). +func serveHTTP(ctx context.Context, cfg config) error { + st, err := store.Open(cfg.dbPath) + if err != nil { + return err + } + defer st.Close() + + srvApp, err := web.New(st, web.Config{ + Hostname: cfg.hostname, + CookieSecure: cfg.cookieSecure, + }, cfg.setupTokenPath) + if err != nil { + return err + } + if err := srvApp.Start(); err != nil { + return err + } srv := &http.Server{ - Addr: addr, - Handler: mux, + Addr: cfg.httpAddr, + Handler: srvApp.Handler(), ReadHeaderTimeout: 10 * time.Second, } @@ -30,38 +46,9 @@ func serveHTTP(ctx context.Context, addr string) error { _ = srv.Shutdown(shutdownCtx) }() - log.Printf("http panel listening on %s", addr) + log.Printf("http panel listening on %s", cfg.httpAddr) if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) { return err } return nil } - -func handleHealth(w http.ResponseWriter, _ *http.Request) { - w.Header().Set("Content-Type", "text/plain; charset=utf-8") - w.WriteHeader(http.StatusOK) - _, _ = w.Write([]byte("ok\n")) -} - -func handleIndex(w http.ResponseWriter, r *http.Request) { - if r.URL.Path != "/" { - http.NotFound(w, r) - return - } - w.Header().Set("Content-Type", "text/html; charset=utf-8") - _, _ = w.Write([]byte(indexHTML)) -} - -const indexHTML = ` - - - - -SelfPost - - -

SelfPost

-

The control panel is starting up. Administrator setup and login arrive in a later build.

- - -` diff --git a/cmd/panel/main.go b/cmd/panel/main.go index 004a558..d73a89a 100644 --- a/cmd/panel/main.go +++ b/cmd/panel/main.go @@ -14,6 +14,7 @@ import ( "log" "os" "os/signal" + "path/filepath" "sync" "syscall" @@ -43,13 +44,28 @@ type config struct { httpAddr string journalSocket string mailLog string + + dataDir string + dbPath string + setupTokenPath string + hostname string + cookieSecure bool } func loadConfig() config { + dataDir := envDefault("SELFPOST_DATA_DIR", "/data") return config{ httpAddr: envDefault("PANEL_HTTP_ADDR", ":8080"), journalSocket: envDefault("JOURNAL_MILTER_SOCKET", "/run/selfpost/journal.sock"), mailLog: envDefault("MAIL_LOG", "/var/log/mail.log"), + + dataDir: dataDir, + dbPath: envDefault("SELFPOST_DB_PATH", filepath.Join(dataDir, "selfpost.db")), + setupTokenPath: envDefault("SELFPOST_SETUP_TOKEN_FILE", filepath.Join(dataDir, "setup-token")), + hostname: os.Getenv("SELFPOST_HOSTNAME"), + // Secure cookies by default (spec 7.6.6); PANEL_COOKIE_SECURE=false is a + // development-only escape hatch for testing over plain HTTP. + cookieSecure: envDefault("PANEL_COOKIE_SECURE", "true") != "false", } } @@ -79,7 +95,7 @@ func run() error { name string fn func(context.Context) error }{ - {"http", func(ctx context.Context) error { return serveHTTP(ctx, cfg.httpAddr) }}, + {"http", func(ctx context.Context) error { return serveHTTP(ctx, cfg) }}, {"journal-milter", func(ctx context.Context) error { return serveJournalStub(ctx, cfg.journalSocket) }}, {"log-tailer", func(ctx context.Context) error { return tailMailLog(ctx, cfg.mailLog) }}, } diff --git a/docs/progress.md b/docs/progress.md index 3c0ce93..0f06169 100644 --- a/docs/progress.md +++ b/docs/progress.md @@ -46,10 +46,19 @@ ## Текущее состояние -- **Текущая фаза:** 1 ✅ закрыта → следующая **Фаза 2** (SQLite + setup-link + вход админа) -- **Модель для Фазы 2:** Opus (безопасность 7.6: крипто-токен, сессии, bcrypt) -- **Статус:** образ собирается и проверен на сервере; три процесса живы, холодный старт и crashexit подтверждены -- **Следующий шаг (Фаза 2):** SQLite-схема + миграции (домены, приложения, админ, `send_log`, лимиты, настройки, флаг «настройка завершена»/setup-токен), единый корень `/data`; **setup secret-link** (токен ≥128 бит `crypto/rand`, TTL 10 мин с перегенерацией, rate-limit маршрута, `subtle.ConstantTimeCompare`, неудачи НЕ инвалидируют токен, одноразовая форма создания админа, инвалидация навсегда после успеха → `/setup/*` 404); bcrypt-хэш пароля админа; логин + сессии (крипто-токен, cookie `HttpOnly`/`Secure`/`SameSite`), rate-limit логина; базовый layout `html/template` + вендоренный HTMX + auth-middleware. Выбрать драйвер `modernc.org/sqlite` (первая сторонняя зависимость — появится `go.sum`). Проверка: первый запуск печатает setup-ссылку, админ создаётся один раз, повторный `/setup` → 404, вход/выход работают. +- **Текущая фаза:** 2 ✅ закрыта → следующая **Фаза 3** (домены + OpenDKIM) +- **Модель для Фазы 3:** Opus (генерация конфигов + exec-safety 7.6.3–4, валидация имени домена 7.6.2) +- **Статус:** SQLite-персистентность, setup secret-link и вход админа реализованы и проверены на сервере (`go vet`/`build`/`test` зелёные, docker-образ собирается, контейнер поднимает три процесса и создаёт БД под `panel`) +- **Следующий шаг (Фаза 3):** добавить/список/удалить домен (при удалении — предупреждение о каскаде приложений, ТЗ 7.2.4); генерация DKIM-ключа + селектор per-domain (дефолт из `DKIM_SELECTOR_DEFAULT`), ключи в `/data/...` переживают рестарт (ТЗ 6, 9); `KeyTable`/`SigningTable` + reload OpenDKIM (сейчас `opendkim.conf` в Mode `v` без ключей — перевести в `s` + KeyTable); показ DKIM TXT-записи per-domain (ТЗ 7.2.10). **Безопасность:** строгая валидация имени домена (whitelist, 7.6.2), безопасная запись конфигов с экранированием (7.6.4), `os/exec` без shell и без интерполяции ввода (7.6.3). Таблицы `domains`/`applications`/`application_addresses` уже в схеме (миграция 0001). + +### Сделано в Фазе 2 +- **SQLite-персистентность** (`internal/store`): драйвер `modernc.org/sqlite` (чистый Go, без cgo — статик-бинарник сохранён; первые сторонние зависимости → появились `go.mod` require + `go.sum`), WAL + `foreign_keys(ON)` + `busy_timeout` через DSN `_pragma`, `MaxOpenConns(1)`. Встроенные (`embed`) нумерованные миграции с версионированием через `PRAGMA user_version`; миграция `0001_init.sql` заводит всю схему ТЗ 9: `admin` (одна строка, `CHECK id=1`), `settings`, `domains`, `applications`, `application_addresses`, `send_log` (+индексы), `rate_limits`. Запросы `AdminExists/CreateAdmin/GetAdmin`. +- **Setup secret-link** (`internal/web/setup.go`, ТЗ 7.6.1): токен 128 бит из `crypto/rand` (base64url), ссылка `https:///setup/` печатается в лог **и** пишется в `/data/setup-token` (0600); TTL 10 мин с перегенерацией при истечении/рестарте (пока нет админа); сравнение `subtle.ConstantTimeCompare`; **неудачи НЕ инвалидируют токен**; «настройка завершена» = наличие строки `admin` (источник истины), поэтому после успеха токен сгорает навсегда и весь `/setup/*` → 404. Форма создания админа — одноразовая; гонка двух POST безопасна (`CHECK id=1` + проверка существования). +- **Пароль админа** — только `bcrypt` (`golang.org/x/crypto/bcrypt`, DefaultCost); серверная валидация (username whitelist 7.6.2, пароль ≥12). +- **Логин + сессии** (`internal/web/handlers_auth.go`, `session.go`): вход сверяет username + bcrypt (bcrypt считается всегда — timing-инвариантно), сессии в памяти (не в списке ТЗ 9 на персист — рестарт просто разлогинивает), крипто-токен 256 бит; cookie `HttpOnly`/`Secure`/`SameSite=Lax` (`Secure` по умолчанию, отключается `PANEL_COOKIE_SECURE=false` только для dev-HTTP); rate-limit логина (`ratelimit.go`, 10/15мин по IP) и отдельный на `/setup` (10/мин); auth-middleware защищает панель. +- **Front-end**: базовый layout `html/template` (автоэкранирование, 7.6.7) + страницы setup/login/dashboard (`embed`); вендоренный `htmx.min.js` 2.0.4 (`internal/web/static`, отдаётся с `/static/`). +- **Entrypoint для bind-mount** (`build/entrypoint.sh`): `/data` — host bind mount → приходит от root, а панель работает под непривилегированным `panel` (uid 999). Точка входа под root чинит владельца `/data` перед `exec supervisord` (иначе SQLite `unable to open database file`). Найдено и исправлено при контейнерной проверке. +- **Проверено на сервере** (selfpost.mixfed.ru): `go vet`/`go build`/`go test`/`gofmt -l` чисто; функциональный e2e (curl): setup-ссылка печатается+в файл, `GET /setup/`→200, неверный/просроченный→404, `POST /setup` создаёт админа→303, повторный `/setup`→404, файл токена удалён; плохой логин→401, хороший→303 с cookie `HttpOnly; Secure; SameSite=Lax`, `/`→200, logout→303, после logout `/`→303; рестарт с существующим админом не печатает setup. Docker-образ собирается; контейнер с `-v ./data:/data`: три процесса, БД+токен создаются под `panel`, токен 0600. ### Сделано в Фазе 1 - **Образ** `build/Dockerfile` (bookworm-slim): многостадийная статическая сборка Go (`CGO_ENABLED=0`, `go vet` в сборке); рантайм — postfix, opendkim(+tools), cyrus-sasl (`sasl2-bin`, `libsasl2-modules`), supervisor, logrotate, ca-certificates; `maillog_file=/var/log/mail.log`; непривилегированный пользователь `panel` (ТЗ 7.6.8); `.dockerignore` (dev/ и docs/ не попадают в контекст). @@ -82,3 +91,4 @@ - **Фаза 0** (2026-07-11, Opus) — каркас проекта + build-пайплайн + спайк go-milter (риск ТЗ 7.3 снят). Коммиты `4e589e1` (каркас), `87388b4` (план). - **Фаза 1** (2026-07-11, Opus) — Docker-образ + supervisord + три процесса, холодный старт (обёртка ждёт milter-сокеты) и crashexit проверены на сервере. Коммит `ed9e942`. +- **Фаза 2** (2026-07-11, Opus) — SQLite (`modernc.org/sqlite`, миграции, схема ТЗ 9), setup secret-link (128-бит токен, TTL 10м, const-time, одноразово), bcrypt-админ, логин/сессии/cookie-флаги, rate-limit setup+логина, html/template + вендоренный HTMX, auth-middleware; entrypoint чинит владельца bind-mount `/data`. Проверено на сервере (e2e curl + docker run). diff --git a/go.mod b/go.mod index 33f9c2a..ed5d954 100644 --- a/go.mod +++ b/go.mod @@ -1,3 +1,20 @@ module codeberg.org/mix/selfpost go 1.26 + +require ( + golang.org/x/crypto v0.54.0 + modernc.org/sqlite v1.53.0 +) + +require ( + github.com/dustin/go-humanize v1.0.1 // indirect + github.com/google/uuid v1.6.0 // indirect + github.com/mattn/go-isatty v0.0.20 // indirect + github.com/ncruces/go-strftime v1.0.0 // indirect + github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect + golang.org/x/sys v0.47.0 // indirect + modernc.org/libc v1.73.4 // indirect + modernc.org/mathutil v1.7.1 // indirect + modernc.org/memory v1.11.0 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..5456856 --- /dev/null +++ b/go.sum @@ -0,0 +1,53 @@ +github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY= +github.com/dustin/go-humanize v1.0.1/go.mod 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h1:xoEpOIpGrgT48H5iiyt/YXPCZPEzlfmfFwtk8Lklw8s= +modernc.org/strutil v1.2.1 h1:UneZBkQA+DX2Rp35KcM69cSsNES9ly8mQWD71HKlOA0= +modernc.org/strutil v1.2.1/go.mod h1:EHkiggD70koQxjVdSBM3JKM7k6L0FbGE5eymy9i3B9A= +modernc.org/token v1.1.0 h1:Xl7Ap9dKaEs5kLoOQeQmPWevfnk/DM5qcLcYlA8ys6Y= +modernc.org/token v1.1.0/go.mod h1:UGzOrNV1mAFSEB63lOFHIpNRUVMvYTc6yu1SMY/XTDM= diff --git a/internal/store/admin.go b/internal/store/admin.go new file mode 100644 index 0000000..062e526 --- /dev/null +++ b/internal/store/admin.go @@ -0,0 +1,61 @@ +package store + +import ( + "database/sql" + "errors" + "fmt" + "time" +) + +// ErrNoAdmin is returned by GetAdmin when primary setup has not happened yet. +var ErrNoAdmin = errors.New("no administrator account") + +// Admin is the single panel administrator (spec 7.6.1). +type Admin struct { + Username string + PasswordHash string + CreatedAt time.Time +} + +// AdminExists reports whether the administrator account has been created. This +// doubles as the "primary setup complete" flag: once true, the /setup route is +// permanently gone (spec 7.6.1). +func (s *Store) AdminExists() (bool, error) { + var n int + if err := s.db.QueryRow("SELECT COUNT(*) FROM admin").Scan(&n); err != nil { + return false, fmt.Errorf("count admin: %w", err) + } + return n > 0, nil +} + +// CreateAdmin inserts the administrator row. It fails if one already exists, +// which — combined with the id=1 constraint — makes admin creation one-shot +// even under a race between two setup submissions. +func (s *Store) CreateAdmin(username, passwordHash string) error { + _, err := s.db.Exec( + "INSERT INTO admin (id, username, password_hash, created_at) VALUES (1, ?, ?, ?)", + username, passwordHash, time.Now().UTC().Format(time.RFC3339), + ) + if err != nil { + return fmt.Errorf("create admin: %w", err) + } + return nil +} + +// GetAdmin returns the administrator account, or ErrNoAdmin if setup is pending. +func (s *Store) GetAdmin() (Admin, error) { + var ( + a Admin + createdAt string + ) + err := s.db.QueryRow("SELECT username, password_hash, created_at FROM admin WHERE id = 1"). + Scan(&a.Username, &a.PasswordHash, &createdAt) + if errors.Is(err, sql.ErrNoRows) { + return Admin{}, ErrNoAdmin + } + if err != nil { + return Admin{}, fmt.Errorf("get admin: %w", err) + } + a.CreatedAt, _ = time.Parse(time.RFC3339, createdAt) + return a, nil +} diff --git a/internal/store/migrations/0001_init.sql b/internal/store/migrations/0001_init.sql new file mode 100644 index 0000000..d8ae924 --- /dev/null +++ b/internal/store/migrations/0001_init.sql @@ -0,0 +1,76 @@ +-- Initial SelfPost schema (spec 9). One SQLite file under /data holds the whole +-- panel state so a single directory backup/restore is sufficient (spec 7.5.A). + +-- Single administrator account (spec 7.6.1). Exactly one row is allowed; the +-- presence of that row is what marks primary setup as complete, which is why +-- the /setup route disappears once it exists. +CREATE TABLE admin ( + id INTEGER PRIMARY KEY CHECK (id = 1), + username TEXT NOT NULL, + password_hash TEXT NOT NULL, + created_at TEXT NOT NULL +); + +-- Free-form key/value panel settings (retention overrides, misc flags). +CREATE TABLE settings ( + key TEXT PRIMARY KEY, + value TEXT NOT NULL +); + +-- Sending domains managed through the panel (spec 4.1). DKIM keys themselves +-- live on disk under /data; this row records the selector and metadata. +CREATE TABLE domains ( + id INTEGER PRIMARY KEY AUTOINCREMENT, + name TEXT NOT NULL UNIQUE, + dkim_selector TEXT NOT NULL, + created_at TEXT NOT NULL +); + +-- Applications bound to a domain (spec 4.1). address_mode is either the domain +-- wildcard or an explicit address list; the SASL login is globally unique. +CREATE TABLE applications ( + id INTEGER PRIMARY KEY AUTOINCREMENT, + domain_id INTEGER NOT NULL REFERENCES domains(id) ON DELETE CASCADE, + login TEXT NOT NULL UNIQUE, + address_mode TEXT NOT NULL CHECK (address_mode IN ('wildcard', 'list')), + created_at TEXT NOT NULL +); + +-- Explicit sender addresses for applications in 'list' mode. Each address must +-- belong to the application's domain (validated in the panel, spec 7.6.2). +CREATE TABLE application_addresses ( + id INTEGER PRIMARY KEY AUTOINCREMENT, + application_id INTEGER NOT NULL REFERENCES applications(id) ON DELETE CASCADE, + address TEXT NOT NULL, + UNIQUE (application_id, address) +); + +-- Structured send log (spec 7.3). One row per (queue-id, recipient); the +-- log-tailer advances status from queued to a final state. +CREATE TABLE send_log ( + id INTEGER PRIMARY KEY AUTOINCREMENT, + queue_id TEXT, + domain TEXT, + app_login TEXT, + from_addr TEXT, + to_addr TEXT, + subject TEXT, + status TEXT NOT NULL, + created_at TEXT NOT NULL, + updated_at TEXT NOT NULL +); +CREATE INDEX idx_send_log_queue_id ON send_log (queue_id); +CREATE INDEX idx_send_log_domain ON send_log (domain); +CREATE INDEX idx_send_log_created_at ON send_log (created_at); + +-- Differentiated rate limits per domain/application (spec 7.4). Both the IP +-- binding and the message limit are optional. +CREATE TABLE rate_limits ( + id INTEGER PRIMARY KEY AUTOINCREMENT, + scope TEXT NOT NULL CHECK (scope IN ('domain', 'application')), + ref_id INTEGER NOT NULL, + allowed_ips TEXT, + max_messages INTEGER, + window_seconds INTEGER, + UNIQUE (scope, ref_id) +); diff --git a/internal/store/store.go b/internal/store/store.go new file mode 100644 index 0000000..e9b22c0 --- /dev/null +++ b/internal/store/store.go @@ -0,0 +1,100 @@ +// Package store owns the SelfPost SQLite database: the single file under /data +// that persists the administrator account, sending domains and applications, +// the send log and rate-limit settings (spec 9). It exposes typed queries so +// the rest of the panel never builds SQL by hand. +package store + +import ( + "database/sql" + "embed" + "fmt" + "io/fs" + "sort" + + _ "modernc.org/sqlite" // pure-Go SQLite driver (no cgo), keeps the static build +) + +//go:embed migrations/*.sql +var migrationsFS embed.FS + +// Store wraps the database connection pool. +type Store struct { + db *sql.DB +} + +// Open opens (creating if needed) the SQLite database at path, enables WAL and +// foreign keys, and applies any pending migrations. The caller owns Close. +func Open(path string) (*Store, error) { + // _pragma parameters are applied on every pooled connection by the driver, + // so foreign-key enforcement and WAL survive connection churn. + dsn := fmt.Sprintf("file:%s?_pragma=journal_mode(WAL)&_pragma=busy_timeout(5000)&_pragma=foreign_keys(ON)", path) + db, err := sql.Open("sqlite", dsn) + if err != nil { + return nil, fmt.Errorf("open database: %w", err) + } + // modernc's driver serializes writes anyway; a small pool avoids + // "database is locked" surprises under WAL. + db.SetMaxOpenConns(1) + + s := &Store{db: db} + if err := s.migrate(); err != nil { + db.Close() + return nil, err + } + return s, nil +} + +// Close closes the underlying database. +func (s *Store) Close() error { + return s.db.Close() +} + +// migrate applies embedded migrations in filename order, tracking progress via +// SQLite's PRAGMA user_version so each migration runs at most once. +func (s *Store) migrate() error { + entries, err := fs.ReadDir(migrationsFS, "migrations") + if err != nil { + return fmt.Errorf("read migrations: %w", err) + } + names := make([]string, 0, len(entries)) + for _, e := range entries { + if !e.IsDir() { + names = append(names, e.Name()) + } + } + sort.Strings(names) + + var version int + if err := s.db.QueryRow("PRAGMA user_version").Scan(&version); err != nil { + return fmt.Errorf("read schema version: %w", err) + } + + for i, name := range names { + target := i + 1 + if target <= version { + continue + } + sqlBytes, err := migrationsFS.ReadFile("migrations/" + name) + if err != nil { + return fmt.Errorf("read migration %s: %w", name, err) + } + tx, err := s.db.Begin() + if err != nil { + return fmt.Errorf("begin migration %s: %w", name, err) + } + if _, err := tx.Exec(string(sqlBytes)); err != nil { + tx.Rollback() + return fmt.Errorf("apply migration %s: %w", name, err) + } + // PRAGMA does not accept a bound parameter, and target is a trusted + // loop index, so formatting it in is safe. + if _, err := tx.Exec(fmt.Sprintf("PRAGMA user_version = %d", target)); err != nil { + tx.Rollback() + return fmt.Errorf("bump schema version for %s: %w", name, err) + } + if err := tx.Commit(); err != nil { + return fmt.Errorf("commit migration %s: %w", name, err) + } + } + return nil +} diff --git a/internal/web/handlers_auth.go b/internal/web/handlers_auth.go new file mode 100644 index 0000000..6213b3d --- /dev/null +++ b/internal/web/handlers_auth.go @@ -0,0 +1,113 @@ +package web + +import ( + "errors" + "net/http" + "strings" + + "codeberg.org/mix/selfpost/internal/store" + "golang.org/x/crypto/bcrypt" +) + +// sessionCookie is the name of the panel session cookie. +const sessionCookie = "selfpost_session" + +// handleLogin serves the login form (GET) and authenticates (POST). Until an +// administrator exists there is nobody to log in, so it points at setup. +func (s *Server) handleLogin(w http.ResponseWriter, r *http.Request) { + exists, err := s.store.AdminExists() + if err != nil { + http.Error(w, "internal error", http.StatusInternalServerError) + return + } + if !exists { + // No admin yet: login is meaningless. Send a clear message rather than + // a failing form. + s.render(w, http.StatusOK, "login", map[string]any{ + "Title": "SelfPost — Sign in", + "SetupHint": true, + }) + return + } + + switch r.Method { + case http.MethodGet: + s.renderLogin(w, http.StatusOK, "") + case http.MethodPost: + s.submitLogin(w, r) + default: + w.Header().Set("Allow", "GET, POST") + http.Error(w, "method not allowed", http.StatusMethodNotAllowed) + } +} + +func (s *Server) renderLogin(w http.ResponseWriter, status int, formErr string) { + s.render(w, status, "login", map[string]any{ + "Title": "SelfPost — Sign in", + "Error": formErr, + }) +} + +func (s *Server) submitLogin(w http.ResponseWriter, r *http.Request) { + // Brute-force throttle by client IP (spec 7.6.5). + if !s.loginLimiter.Allow(clientIP(r)) { + s.renderLogin(w, http.StatusTooManyRequests, "Too many attempts. Please wait and try again.") + return + } + if err := r.ParseForm(); err != nil { + s.renderLogin(w, http.StatusBadRequest, "Invalid form submission.") + return + } + username := strings.TrimSpace(r.PostFormValue("username")) + password := r.PostFormValue("password") + + admin, err := s.store.GetAdmin() + if err != nil { + if !errors.Is(err, store.ErrNoAdmin) { + logf("panel: login: get admin failed: %v", err) + } + s.renderLogin(w, http.StatusUnauthorized, "Invalid username or password.") + return + } + + // Always run bcrypt so timing does not distinguish "wrong user" from + // "wrong password", and compare the username too. + pwErr := bcrypt.CompareHashAndPassword([]byte(admin.PasswordHash), []byte(password)) + if username != admin.Username || pwErr != nil { + s.renderLogin(w, http.StatusUnauthorized, "Invalid username or password.") + return + } + + token := s.sessions.Create(admin.Username) + http.SetCookie(w, &http.Cookie{ + Name: sessionCookie, + Value: token, + Path: "/", + HttpOnly: true, + Secure: s.cfg.CookieSecure, + SameSite: http.SameSiteLaxMode, + }) + http.Redirect(w, r, "/", http.StatusSeeOther) +} + +// handleLogout destroys the session and clears the cookie. +func (s *Server) handleLogout(w http.ResponseWriter, r *http.Request) { + if r.Method != http.MethodPost { + w.Header().Set("Allow", "POST") + http.Error(w, "method not allowed", http.StatusMethodNotAllowed) + return + } + if c, err := r.Cookie(sessionCookie); err == nil { + s.sessions.Destroy(c.Value) + } + http.SetCookie(w, &http.Cookie{ + Name: sessionCookie, + Value: "", + Path: "/", + MaxAge: -1, + HttpOnly: true, + Secure: s.cfg.CookieSecure, + SameSite: http.SameSiteLaxMode, + }) + http.Redirect(w, r, "/login", http.StatusSeeOther) +} diff --git a/internal/web/handlers_setup.go b/internal/web/handlers_setup.go new file mode 100644 index 0000000..6e26257 --- /dev/null +++ b/internal/web/handlers_setup.go @@ -0,0 +1,98 @@ +package web + +import ( + "net/http" + "strings" + + "golang.org/x/crypto/bcrypt" +) + +// handleSetup serves the one-time administrator creation flow at +// /setup/ (spec 7.6.1). Once an administrator exists the whole route +// returns 404; an invalid or expired token is indistinguishable from a missing +// page, also 404. +func (s *Server) handleSetup(w http.ResponseWriter, r *http.Request) { + // Route-specific rate limit, separate from login (spec 7.6.1). + if !s.setupLimiter.Allow(clientIP(r)) { + http.Error(w, "too many requests", http.StatusTooManyRequests) + return + } + + token := strings.TrimPrefix(r.URL.Path, "/setup/") + // Reject nested/garbage paths outright. + if token == "" || strings.Contains(token, "/") { + http.NotFound(w, r) + return + } + if !s.setup.validate(token) { + http.NotFound(w, r) + return + } + + switch r.Method { + case http.MethodGet: + s.renderSetupForm(w, http.StatusOK, token, "") + case http.MethodPost: + s.submitSetup(w, r, token) + default: + w.Header().Set("Allow", "GET, POST") + http.Error(w, "method not allowed", http.StatusMethodNotAllowed) + } +} + +func (s *Server) renderSetupForm(w http.ResponseWriter, status int, token, formErr string) { + s.render(w, status, "setup", map[string]any{ + "Title": "SelfPost — Create administrator", + "Token": token, + "Error": formErr, + }) +} + +func (s *Server) submitSetup(w http.ResponseWriter, r *http.Request, token string) { + if err := r.ParseForm(); err != nil { + s.renderSetupForm(w, http.StatusBadRequest, token, "Invalid form submission.") + return + } + username := strings.TrimSpace(r.PostFormValue("username")) + password := r.PostFormValue("password") + confirm := r.PostFormValue("password_confirm") + + if err := validateUsername(username); err != nil { + s.renderSetupForm(w, http.StatusBadRequest, token, err.Error()) + return + } + if password != confirm { + s.renderSetupForm(w, http.StatusBadRequest, token, "Passwords do not match.") + return + } + if err := validateAdminPassword(password); err != nil { + s.renderSetupForm(w, http.StatusBadRequest, token, err.Error()) + return + } + + hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost) + if err != nil { + logf("panel: setup: hashing password failed: %v", err) + s.renderSetupForm(w, http.StatusInternalServerError, token, "Internal error. Please try again.") + return + } + + if err := s.store.CreateAdmin(username, string(hash)); err != nil { + // A concurrent submission may have already created the admin; the + // id=1 / non-empty-table guard makes this the second writer. Treat it + // as "setup already done" rather than an error. + if exists, _ := s.store.AdminExists(); exists { + s.setup.complete() + http.Redirect(w, r, "/login", http.StatusSeeOther) + return + } + logf("panel: setup: create admin failed: %v", err) + s.renderSetupForm(w, http.StatusInternalServerError, token, "Internal error. Please try again.") + return + } + + // Setup is now permanently complete: burn the token (spec 7.6.1). + s.setup.complete() + logf("panel: administrator %q created; setup link is now disabled", username) + http.Redirect(w, r, "/login", http.StatusSeeOther) +} diff --git a/internal/web/middleware.go b/internal/web/middleware.go new file mode 100644 index 0000000..3259012 --- /dev/null +++ b/internal/web/middleware.go @@ -0,0 +1,51 @@ +package web + +import ( + "context" + "net/http" +) + +type ctxKey int + +const usernameKey ctxKey = 0 + +// requireAuth wraps a handler so only requests with a valid session cookie +// reach it; everyone else is redirected to the login page. The authenticated +// username is stashed in the request context for downstream handlers. +func (s *Server) requireAuth(next http.Handler) http.Handler { + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + c, err := r.Cookie(sessionCookie) + if err != nil { + http.Redirect(w, r, "/login", http.StatusSeeOther) + return + } + username, ok := s.sessions.Lookup(c.Value) + if !ok { + http.Redirect(w, r, "/login", http.StatusSeeOther) + return + } + ctx := context.WithValue(r.Context(), usernameKey, username) + next.ServeHTTP(w, r.WithContext(ctx)) + }) +} + +// currentUser returns the authenticated username from the request context. +func currentUser(r *http.Request) string { + if v, ok := r.Context().Value(usernameKey).(string); ok { + return v + } + return "" +} + +// handleDashboard is the authenticated landing page. Phase 2 shows a minimal +// shell; domains, applications and the send log arrive in later phases. +func (s *Server) handleDashboard(w http.ResponseWriter, r *http.Request) { + if r.URL.Path != "/" { + http.NotFound(w, r) + return + } + s.render(w, http.StatusOK, "dashboard", map[string]any{ + "Title": "SelfPost", + "User": currentUser(r), + }) +} diff --git a/internal/web/ratelimit.go b/internal/web/ratelimit.go new file mode 100644 index 0000000..c0dde2b --- /dev/null +++ b/internal/web/ratelimit.go @@ -0,0 +1,62 @@ +package web + +import ( + "sync" + "time" +) + +// rateLimiter is a simple fixed-window per-key counter used to throttle the +// setup and login routes (spec 7.6.1, 7.6.5). Keys are client IPs. It is not a +// precise sliding window — a coarse backstop against brute-force and log noise +// is all these routes need. +type rateLimiter struct { + max int + window time.Duration + + mu sync.Mutex + buckets map[string]*rlBucket +} + +type rlBucket struct { + count int + windowEnds time.Time +} + +func newRateLimiter(max int, window time.Duration) *rateLimiter { + return &rateLimiter{ + max: max, + window: window, + buckets: make(map[string]*rlBucket), + } +} + +// Allow records an attempt for key and reports whether it is within the limit. +// The current window is reset lazily once it elapses. +func (r *rateLimiter) Allow(key string) bool { + now := time.Now() + r.mu.Lock() + defer r.mu.Unlock() + + b := r.buckets[key] + if b == nil || now.After(b.windowEnds) { + r.buckets[key] = &rlBucket{count: 1, windowEnds: now.Add(r.window)} + r.sweep(now) + return true + } + if b.count >= r.max { + return false + } + b.count++ + return true +} + +// sweep drops expired buckets so the map cannot grow without bound. Called +// under the lock while a window is being reset, which is often enough given the +// low request volume of these routes. +func (r *rateLimiter) sweep(now time.Time) { + for k, b := range r.buckets { + if now.After(b.windowEnds) { + delete(r.buckets, k) + } + } +} diff --git a/internal/web/session.go b/internal/web/session.go new file mode 100644 index 0000000..e85cf83 --- /dev/null +++ b/internal/web/session.go @@ -0,0 +1,62 @@ +package web + +import ( + "sync" + "time" +) + +// sessionTTL bounds how long a login lasts before re-authentication is needed. +const sessionTTL = 12 * time.Hour + +// sessionStore keeps active sessions in memory. Sessions are deliberately not +// persisted (spec 9 lists what must survive restart; sessions are not on it): +// a restart simply logs the admin out, which is acceptable and avoids storing +// bearer tokens on disk. Tokens are crypto-random (spec 7.6.6). +type sessionStore struct { + mu sync.Mutex + sessions map[string]session +} + +type session struct { + username string + expiresAt time.Time +} + +func newSessionStore() *sessionStore { + return &sessionStore{sessions: make(map[string]session)} +} + +// Create issues a new session for username and returns its token. +func (s *sessionStore) Create(username string) string { + token := randomToken(32) + s.mu.Lock() + defer s.mu.Unlock() + s.sessions[token] = session{username: username, expiresAt: time.Now().Add(sessionTTL)} + return token +} + +// Lookup returns the session username for a token if it exists and is unexpired. +func (s *sessionStore) Lookup(token string) (string, bool) { + if token == "" { + return "", false + } + now := time.Now() + s.mu.Lock() + defer s.mu.Unlock() + sess, ok := s.sessions[token] + if !ok { + return "", false + } + if now.After(sess.expiresAt) { + delete(s.sessions, token) + return "", false + } + return sess.username, true +} + +// Destroy invalidates a session token (logout). +func (s *sessionStore) Destroy(token string) { + s.mu.Lock() + defer s.mu.Unlock() + delete(s.sessions, token) +} diff --git a/internal/web/setup.go b/internal/web/setup.go new file mode 100644 index 0000000..e386cdf --- /dev/null +++ b/internal/web/setup.go @@ -0,0 +1,136 @@ +package web + +import ( + "crypto/subtle" + "fmt" + "os" + "sync" + "time" + + "codeberg.org/mix/selfpost/internal/store" +) + +// setupTokenTTL is the lifetime of a setup token (spec 7.6.1). After it +// elapses the token is regenerated and re-announced on the next /setup hit. +const setupTokenTTL = 10 * time.Minute + +// setupManager owns the one-time administrator setup token. The token itself is +// ephemeral (regenerated on restart or expiry) and lives only in memory; the +// persistent "setup complete" fact is the presence of the admin row in the +// store, so once that exists the token is gone for good (spec 7.6.1). +type setupManager struct { + store *store.Store + hostname string + tokenPath string + + mu sync.Mutex + token string + expiresAt time.Time +} + +func newSetupManager(st *store.Store, hostname, tokenPath string) *setupManager { + return &setupManager{store: st, hostname: hostname, tokenPath: tokenPath} +} + +// bootstrap runs once at startup. If setup is already complete it clears any +// stale token file; otherwise it mints and announces the first token. +func (m *setupManager) bootstrap() error { + done, err := m.store.AdminExists() + if err != nil { + return err + } + if done { + m.clearTokenFile() + return nil + } + m.mu.Lock() + defer m.mu.Unlock() + m.regenerateLocked() + return nil +} + +// activeToken returns the current valid setup token, regenerating and +// re-announcing it if none exists or it has expired. It returns ("", false) +// once setup is complete — callers must treat that as "route gone" (404). +func (m *setupManager) activeToken() (string, bool) { + done, err := m.store.AdminExists() + if err != nil { + logf("panel: setup: admin check failed: %v", err) + return "", false + } + if done { + return "", false + } + m.mu.Lock() + defer m.mu.Unlock() + if m.token == "" || time.Now().After(m.expiresAt) { + m.regenerateLocked() + } + return m.token, true +} + +// validate reports whether provided matches the active token, using a +// constant-time comparison to avoid leaking a correct prefix via timing +// (spec 7.6.1). A mismatch does NOT regenerate or invalidate the token: failed +// attempts must not let an attacker DoS a legitimate setup (spec 7.6.1). +func (m *setupManager) validate(provided string) bool { + token, ok := m.activeToken() + if !ok { + return false + } + return subtle.ConstantTimeCompare([]byte(provided), []byte(token)) == 1 +} + +// complete marks setup as finished: the admin row now exists, so drop the +// in-memory token and remove the on-disk copy. +func (m *setupManager) complete() { + m.mu.Lock() + m.token = "" + m.expiresAt = time.Time{} + m.mu.Unlock() + m.clearTokenFile() +} + +// regenerateLocked mints a fresh token, announces it and mirrors it to disk. +// Caller holds m.mu. +func (m *setupManager) regenerateLocked() { + m.token = randomToken(16) // 128 bits of entropy (spec 7.6.1) + m.expiresAt = time.Now().Add(setupTokenTTL) + m.announce(m.token) +} + +// announce prints the setup link to the container log and writes it to the +// token file so it can be read either way (spec 7.6.1). +func (m *setupManager) announce(token string) { + url := m.setupURL(token) + logf("panel: ==================================================================") + logf("panel: SelfPost first-run setup — open this one-time link within %s:", setupTokenTTL) + logf("panel: %s", url) + logf("panel: (also written to %s)", m.tokenPath) + logf("panel: ==================================================================") + + if m.tokenPath == "" { + return + } + // 0600: the token is a bearer secret for creating the admin. + if err := os.WriteFile(m.tokenPath, []byte(url+"\n"), 0o600); err != nil { + logf("panel: setup: could not write token file %s: %v", m.tokenPath, err) + } +} + +func (m *setupManager) setupURL(token string) string { + host := m.hostname + if host == "" { + host = "localhost" + } + return fmt.Sprintf("https://%s/setup/%s", host, token) +} + +func (m *setupManager) clearTokenFile() { + if m.tokenPath == "" { + return + } + if err := os.Remove(m.tokenPath); err != nil && !os.IsNotExist(err) { + logf("panel: setup: could not remove token file %s: %v", m.tokenPath, err) + } +} diff --git a/internal/web/static/htmx.min.js b/internal/web/static/htmx.min.js new file mode 100644 index 0000000..59937d7 --- /dev/null +++ b/internal/web/static/htmx.min.js @@ -0,0 +1 @@ +var htmx=function(){"use strict";const Q={onLoad:null,process:null,on:null,off:null,trigger:null,ajax:null,find:null,findAll:null,closest:null,values:function(e,t){const n=cn(e,t||"post");return 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the parsed page templates. Each page is parsed together with +// the shared base layout so {{ template "base" . }} works. Rendering goes +// through html/template, which auto-escapes all interpolated data (spec 7.6.7). +type templates struct { + pages map[string]*template.Template +} + +// pageFiles maps a logical page name to its template file. Every page composes +// with layout.html. +var pageFiles = map[string]string{ + "setup": "templates/setup.html", + "login": "templates/login.html", + "dashboard": "templates/dashboard.html", +} + +func loadTemplates() (*templates, error) { + t := &templates{pages: make(map[string]*template.Template)} + for name, file := range pageFiles { + tmpl, err := template.New("layout.html").ParseFS(assetsFS, "templates/layout.html", file) + if err != nil { + return nil, fmt.Errorf("parse template %s: %w", name, err) + } + t.pages[name] = tmpl + } + return t, nil +} + +// render writes a page using the base layout. Rendering to a buffer first means +// a template error yields a clean 500 instead of a half-written page. +func (s *Server) render(w http.ResponseWriter, status int, page string, data any) { + tmpl, ok := s.tmpl.pages[page] + if !ok { + http.Error(w, "template not found", http.StatusInternalServerError) + return + } + var buf bytes.Buffer + if err := tmpl.ExecuteTemplate(&buf, "layout.html", data); err != nil { + logf("panel: render %s: %v", page, err) + http.Error(w, "internal error", http.StatusInternalServerError) + return + } + w.Header().Set("Content-Type", "text/html; charset=utf-8") + w.WriteHeader(status) + _, _ = buf.WriteTo(w) +} diff --git a/internal/web/templates/dashboard.html b/internal/web/templates/dashboard.html new file mode 100644 index 0000000..21db85a --- /dev/null +++ b/internal/web/templates/dashboard.html @@ -0,0 +1,15 @@ +{{define "content"}} +
+

SelfPost

+
+ {{.User}} · +
+ +
+
+
+
+

You are signed in. Domains, applications and the send log arrive in the + next phases.

+
+{{end}} diff --git a/internal/web/templates/layout.html b/internal/web/templates/layout.html new file mode 100644 index 0000000..42d4818 --- /dev/null +++ b/internal/web/templates/layout.html @@ -0,0 +1,50 @@ +{{define "layout.html"}} + + + + +{{.Title}} + + + + +
+{{template "content" .}} +
+ +{{end}} diff --git a/internal/web/templates/login.html b/internal/web/templates/login.html new file mode 100644 index 0000000..fd7c416 --- /dev/null +++ b/internal/web/templates/login.html @@ -0,0 +1,20 @@ +{{define "content"}} +

Sign in

+
+ {{if .SetupHint}} +

No administrator has been created yet. Open the one-time + setup link printed in the container log to get started.

+ {{else}} + {{if .Error}}

{{.Error}}

{{end}} +
+ + + + + + + +
+ {{end}} +
+{{end}} diff --git a/internal/web/templates/setup.html b/internal/web/templates/setup.html new file mode 100644 index 0000000..cfaf015 --- /dev/null +++ b/internal/web/templates/setup.html @@ -0,0 +1,20 @@ +{{define "content"}} +

Create administrator

+
+

This one-time link creates the single panel administrator. + After you submit, the link stops working for good.

+ {{if .Error}}

{{.Error}}

{{end}} +
+ + + + + + + + + + +
+
+{{end}} diff --git a/internal/web/token.go b/internal/web/token.go new file mode 100644 index 0000000..6e9ba7e --- /dev/null +++ b/internal/web/token.go @@ -0,0 +1,20 @@ +package web + +import ( + "crypto/rand" + "encoding/base64" +) + +// randomToken returns a URL-safe token with at least nBytes*8 bits of entropy +// drawn from crypto/rand. Setup and session tokens both use this; the setup +// token needs >=128 bits (spec 7.6.1), so callers pass nBytes >= 16. +// +// It panics if the system RNG fails: that is unrecoverable and must never be +// papered over with a weak fallback for a security token. +func randomToken(nBytes int) string { + b := make([]byte, nBytes) + if _, err := rand.Read(b); err != nil { + panic("crypto/rand failed: " + err.Error()) + } + return base64.RawURLEncoding.EncodeToString(b) +} diff --git a/internal/web/validate.go b/internal/web/validate.go new file mode 100644 index 0000000..afd4784 --- /dev/null +++ b/internal/web/validate.go @@ -0,0 +1,42 @@ +package web + +import ( + "fmt" + "unicode" +) + +// minAdminPasswordLen is the floor for the administrator password. The panel is +// public (spec 7.6), so this is deliberately not tiny. +const minAdminPasswordLen = 12 + +const ( + minUsernameLen = 3 + maxUsernameLen = 64 +) + +// validateUsername enforces a strict server-side whitelist (spec 7.6.2): +// letters, digits, dot, dash, underscore. Client validation is never trusted. +func validateUsername(u string) error { + if len(u) < minUsernameLen || len(u) > maxUsernameLen { + return fmt.Errorf("username must be %d-%d characters", minUsernameLen, maxUsernameLen) + } + for _, r := range u { + if r > unicode.MaxASCII || (!isASCIILetterOrDigit(r) && r != '.' && r != '-' && r != '_') { + return fmt.Errorf("username may contain only letters, digits, '.', '-' and '_'") + } + } + return nil +} + +// validateAdminPassword enforces a minimum length. Composition rules beyond +// length tend to reduce entropy in practice, so length is the sole gate. +func validateAdminPassword(p string) error { + if len(p) < minAdminPasswordLen { + return fmt.Errorf("password must be at least %d characters", minAdminPasswordLen) + } + return nil +} + +func isASCIILetterOrDigit(r rune) bool { + return (r >= 'a' && r <= 'z') || (r >= 'A' && r <= 'Z') || (r >= '0' && r <= '9') +} diff --git a/internal/web/web.go b/internal/web/web.go new file mode 100644 index 0000000..e1b279d --- /dev/null +++ b/internal/web/web.go @@ -0,0 +1,115 @@ +// Package web implements the SelfPost control panel's HTTP surface: the +// one-time administrator setup flow (spec 7.6.1), login/session handling +// (spec 7.6.5-6) and the authenticated shell the later phases build on. +package web + +import ( + "embed" + "log" + "net" + "net/http" + "time" + + "codeberg.org/mix/selfpost/internal/store" +) + +//go:embed templates/*.html static/* +var assetsFS embed.FS + +// Config holds the panel's HTTP-facing configuration. +type Config struct { + // Hostname is the server's external hostname, used to build the absolute + // setup link shown in the logs (spec 7.6.1, 8: SELFPOST_HOSTNAME). + Hostname string + // CookieSecure sets the Secure attribute on the session cookie. It defaults + // to true (spec 7.6.6); it exists as a knob only so the panel can be tested + // over plain HTTP in development, never for production. + CookieSecure bool +} + +// Server is the panel HTTP application. +type Server struct { + store *store.Store + cfg Config + tmpl *templates + sessions *sessionStore + setup *setupManager + + loginLimiter *rateLimiter + setupLimiter *rateLimiter +} + +// New builds the panel server. setupTokenPath is where the current setup token +// is mirrored on disk (spec 7.6.1). +func New(st *store.Store, cfg Config, setupTokenPath string) (*Server, error) { + tmpl, err := loadTemplates() + if err != nil { + return nil, err + } + s := &Server{ + store: st, + cfg: cfg, + tmpl: tmpl, + sessions: newSessionStore(), + // Setup: a handful of attempts per minute per IP is plenty for a + // legitimate admin and blunts automated probing (spec 7.6.1). + setupLimiter: newRateLimiter(10, time.Minute), + // Login: throttle brute-force by IP (spec 7.6.5). + loginLimiter: newRateLimiter(10, 15*time.Minute), + } + s.setup = newSetupManager(st, cfg.Hostname, setupTokenPath) + return s, nil +} + +// Start performs first-run bootstrapping: if there is no administrator yet, it +// generates and announces the setup link (spec 7.6.1). Safe to call once at +// server startup. +func (s *Server) Start() error { + return s.setup.bootstrap() +} + +// Handler returns the panel's HTTP handler (router). +func (s *Server) Handler() http.Handler { + mux := http.NewServeMux() + + // Health check stays unauthenticated for the container/orchestrator. + mux.HandleFunc("/healthz", handleHealth) + + // Vendored static assets (HTMX). Served from the embedded FS. + mux.Handle("/static/", http.FileServer(http.FS(assetsFS))) + + // One-time administrator setup (spec 7.6.1). + mux.HandleFunc("/setup/", s.handleSetup) + + // Authentication. + mux.HandleFunc("/login", s.handleLogin) + mux.HandleFunc("/logout", s.handleLogout) + + // Authenticated panel. + mux.Handle("/", s.requireAuth(http.HandlerFunc(s.handleDashboard))) + + return mux +} + +func handleHealth(w http.ResponseWriter, _ *http.Request) { + w.Header().Set("Content-Type", "text/plain; charset=utf-8") + w.WriteHeader(http.StatusOK) + _, _ = w.Write([]byte("ok\n")) +} + +// clientIP extracts the peer IP for rate-limiting. It uses the transport peer +// (RemoteAddr), not client-supplied headers, so it cannot be spoofed; behind a +// reverse proxy this is the proxy address, which is an acceptable backstop for +// a single-admin panel. +func clientIP(r *http.Request) string { + host, _, err := net.SplitHostPort(r.RemoteAddr) + if err != nil { + return r.RemoteAddr + } + return host +} + +// logf is a thin wrapper so handlers log with a consistent prefix. +func logf(format string, args ...any) { + log.Printf(format, args...) +}