downloads API, UI

.gitignore

@@ -1,2 +1,5 @@
 *.sw[po]
 modd-local.conf
+/tmp
+/go.work
+/dist

cmd/dkl-local-server/auth.go

@@ -26,11 +26,32 @@ func authorizeToken(r *http.Request, token string) bool {
 	}
 
 	reqToken := r.Header.Get("Authorization")
+	if reqToken != "" {
+		return reqToken == "Bearer "+token
+	}
 
-	return reqToken == "Bearer "+token
+	return r.URL.Query().Get("token") == token
 }
 
 func forbidden(w http.ResponseWriter, r *http.Request) {
 	log.Printf("denied access to %s from %s", r.RequestURI, r.RemoteAddr)
 	http.Error(w, "Forbidden", http.StatusForbidden)
 }
+
+func requireToken(token string, handler http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+		if !authorizeToken(req, token) {
+			forbidden(w, req)
+			return
+		}
+		handler.ServeHTTP(w, req)
+	})
+}
+
+func requireAdmin(handler http.Handler) http.Handler {
+	return requireToken(*adminToken, handler)
+}
+
+func requireHosts(handler http.Handler) http.Handler {
+	return requireToken(*hostsToken, handler)
+}

cmd/dkl-local-server/main.go

@@ -4,13 +4,16 @@ import (
 	"flag"
 	"log"
 	"net/http"
+	"os"
 	"path/filepath"
 
 	restful "github.com/emicklei/go-restful"
 	swaggerui "github.com/mcluseau/go-swagger-ui"
+	"m.cluseau.fr/go/watchable/streamsse"
 
 	"novit.tech/direktil/pkg/cas"
 
+	dlshtml "novit.tech/direktil/local-server/html"
 	"novit.tech/direktil/local-server/pkg/apiutils"
 )
 
@@ -24,6 +27,8 @@ var (
 	certFile   = flag.String("tls-cert", etcDir+"/server.crt", "Server TLS certificate")
 	keyFile    = flag.String("tls-key", etcDir+"/server.key", "Server TLS key")
 
+	autoUnlock = flag.String("auto-unlock", "", "Auto-unlock store (testing only!)")
+
 	casStore cas.Store
 )
 
@@ -36,6 +41,28 @@ func main() {
 		log.Fatal("no listen address given")
 	}
 
+	computeUIHash()
+
+	openSecretStore()
+
+	{
+		autoUnlock := *autoUnlock
+		if autoUnlock == "" {
+			autoUnlock = os.Getenv("DLS_AUTO_UNLOCK")
+		}
+		if autoUnlock != "" {
+			log.Printf("auto-unlocking the store")
+			err := unlockSecretStore([]byte(autoUnlock))
+			if err != nil {
+				log.Fatal(err)
+			}
+
+			log.Print("store auto-unlocked, admin token is ", *adminToken)
+		}
+
+		os.Setenv("DLS_AUTO_UNLOCK", "")
+	}
+
 	casStore = cas.NewDir(filepath.Join(*dataDir, "cache"))
 	go casCleaner()
 
@@ -45,6 +72,13 @@ func main() {
 
 	swaggerui.HandleAt("/swagger-ui/")
 
+	staticHandler := http.FileServer(http.FS(dlshtml.FS))
+	http.Handle("/favicon.ico", staticHandler)
+	http.Handle("/ui/", staticHandler)
+
+	http.Handle("/public-state", streamsse.StreamHandler(wPublicState))
+	http.Handle("/state", requireAdmin(streamsse.StreamHandler(wState)))
+
 	if *address != "" {
 		log.Print("HTTP listening on ", *address)
 		go log.Fatal(http.ListenAndServe(*address, nil))

cmd/dkl-local-server/secret-store.go

@@ -0,0 +1,171 @@
+package main
+
+import (
+	"crypto/rand"
+	"encoding/base32"
+	"encoding/json"
+	"log"
+	"net/http"
+	"os"
+	"path/filepath"
+	"sync"
+
+	"m.cluseau.fr/go/httperr"
+	"novit.tech/direktil/local-server/secretstore"
+)
+
+var secStore *secretstore.Store
+
+func secStorePath(name string) string { return filepath.Join(*dataDir, "secrets", name) }
+func secKeysStorePath() string        { return secStorePath(".keys") }
+
+func openSecretStore() {
+	var err error
+
+	keysPath := secKeysStorePath()
+
+	if err := os.MkdirAll(filepath.Dir(filepath.Dir(keysPath)), 0755); err != nil {
+		log.Fatal("failed to create dirs: ", err)
+	}
+
+	if err := os.MkdirAll(filepath.Dir(keysPath), 0700); err != nil {
+		log.Fatal("failed to secret store dir: ", err)
+	}
+
+	secStore, err = secretstore.Open(keysPath)
+
+	switch {
+	case err == nil:
+		wPublicState.Change(func(v *PublicState) {
+			v.Store.New = false
+			v.Store.Open = false
+		})
+
+	case os.IsNotExist(err):
+		secStore = secretstore.New()
+		wPublicState.Change(func(v *PublicState) {
+			v.Store.New = true
+			v.Store.Open = false
+		})
+
+	default:
+		log.Fatal("failed to open keys store: ", err)
+	}
+}
+
+var (
+	unlockMutex = sync.Mutex{}
+
+	ErrStoreAlreadyUnlocked = httperr.NewStd(http.StatusConflict, 1, "store already unlocked")
+	ErrInvalidPassphrase    = httperr.NewStd(http.StatusBadRequest, 2, "invalid passphrase")
+)
+
+func unlockSecretStore(passphrase []byte) *httperr.Error {
+	unlockMutex.Lock()
+	defer unlockMutex.Unlock()
+
+	if secStore.Unlocked() {
+		return ErrStoreAlreadyUnlocked
+	}
+
+	if secStore.IsNew() {
+		err := secStore.Init(passphrase)
+		if err != nil {
+			return httperr.New(http.StatusInternalServerError, err)
+		}
+
+		err = secStore.SaveTo(secKeysStorePath())
+		if err != nil {
+			log.Print("secret store save error: ", err)
+			secStore.Close()
+
+			return httperr.New(http.StatusInternalServerError, err)
+		}
+
+	} else {
+		if !secStore.Unlock([]byte(passphrase)) {
+			return ErrInvalidPassphrase
+		}
+	}
+
+	token := ""
+	if err := readSecret("admin-token", &token); err != nil {
+		if !os.IsNotExist(err) {
+			log.Print("failed to read admin token: ", err)
+			secStore.Close()
+
+			return httperr.New(http.StatusInternalServerError, err)
+		}
+
+		randBytes := make([]byte, 32)
+		_, err := rand.Read(randBytes)
+		if err != nil {
+			log.Print("rand read error: ", err)
+			secStore.Close()
+
+			return httperr.New(http.StatusInternalServerError, err)
+		}
+
+		token = base32.StdEncoding.WithPadding(base32.NoPadding).EncodeToString(randBytes)
+		err = writeSecret("admin-token", token)
+		if err != nil {
+			log.Print("write error: ", err)
+			secStore.Close()
+
+			return httperr.New(http.StatusInternalServerError, err)
+		}
+
+		log.Print("wrote new admin token")
+	}
+
+	*adminToken = token
+
+	wPublicState.Change(func(v *PublicState) {
+		v.Store.New = false
+		v.Store.Open = true
+	})
+
+	go updateState()
+
+	return nil
+}
+
+func readSecret(name string, value any) (err error) {
+	f, err := os.Open(secStorePath(name + ".data"))
+	if err != nil {
+		return
+	}
+
+	defer f.Close()
+
+	in, err := secStore.NewReader(f)
+	if err != nil {
+		return
+	}
+
+	return json.NewDecoder(in).Decode(value)
+}
+
+func writeSecret(name string, value any) (err error) {
+	f, err := os.Create(secStorePath(name + ".data.new"))
+	if err != nil {
+		return
+	}
+
+	err = func() (err error) {
+		defer f.Close()
+
+		out, err := secStore.NewWriter(f)
+		if err != nil {
+			return
+		}
+
+		return json.NewEncoder(out).Encode(value)
+	}()
+
+	if err != nil {
+		return
+	}
+
+	return os.Rename(f.Name(), secStorePath(name+".data"))
+}

cmd/dkl-local-server/state.go

@@ -0,0 +1,92 @@
+package main
+
+import (
+	"log"
+
+	"m.cluseau.fr/go/watchable"
+	"novit.tech/direktil/pkg/localconfig"
+)
+
+type PublicState struct {
+	UIHash string
+	Store  struct {
+		New  bool
+		Open bool
+	}
+}
+
+var wPublicState = watchable.New[PublicState]()
+
+type State struct {
+	HasConfig bool
+
+	Clusters []ClusterState
+	Hosts    []HostState
+	Config   *localconfig.Config
+
+	Downloads map[string]DownloadSpec
+}
+
+type ClusterState struct {
+	Name   string
+	Addons bool
+	// TODO CAs
+	// TODO passwords
+	// TODO tokens
+}
+
+type HostState struct {
+	Name    string
+	Cluster string
+	IPs     []string
+}
+
+var wState = watchable.New[State]()
+
+func init() {
+	wState.Set(State{Downloads: map[string]DownloadSpec{}})
+}
+
+func updateState() {
+	log.Print("updating state")
+
+	cfg, err := readConfig()
+	if err != nil {
+		wState.Change(func(v *State) { v.HasConfig = false; v.Config = nil })
+		return
+	}
+
+	if secStore.IsNew() || !secStore.Unlocked() {
+		wState.Change(func(v *State) { v.HasConfig = false; v.Config = nil })
+		return
+	}
+
+	// remove heavy data
+	clusters := make([]ClusterState, 0, len(cfg.Clusters))
+	for _, cluster := range cfg.Clusters {
+		c := ClusterState{
+			Name:   cluster.Name,
+			Addons: len(cluster.Addons) != 0,
+		}
+		clusters = append(clusters, c)
+	}
+
+	hosts := make([]HostState, 0, len(cfg.Hosts))
+	for _, host := range cfg.Hosts {
+		h := HostState{
+			Name:    host.Name,
+			Cluster: host.ClusterName,
+			IPs:     host.IPs,
+		}
+
+		hosts = append(hosts, h)
+	}
+
+	// done
+	wState.Change(func(v *State) {
+		v.HasConfig = true
+		//v.Config = cfg
+		v.Clusters = clusters
+		v.Hosts = hosts
+	})
+}

cmd/dkl-local-server/ui.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"encoding/base32"
+	"io"
+	"io/fs"
+	"log"
+	"strings"
+
+	"github.com/cespare/xxhash"
+	dlshtml "novit.tech/direktil/local-server/html"
+)
+
+func computeUIHash() {
+	xxh := xxhash.New()
+
+	err := fs.WalkDir(dlshtml.FS, "ui", func(path string, entry fs.DirEntry, walkErr error) (err error) {
+		if walkErr != nil {
+			err = walkErr
+			return
+		}
+
+		if entry.IsDir() {
+			return
+		}
+
+		f, err := dlshtml.FS.Open(path)
+		if err != nil {
+			return
+		}
+		defer f.Close()
+
+		io.Copy(xxh, f)
+
+		return nil
+	})
+
+	if err != nil {
+		log.Fatal("failed to hash UI: ", err)
+	}
+
+	h := strings.ToLower(base32.HexEncoding.WithPadding(base32.NoPadding).EncodeToString(xxh.Sum(nil)))[:5]
+	log.Printf("UI hash: %s", h)
+	wPublicState.Change(func(v *PublicState) { v.UIHash = h })
+}

cmd/dkl-local-server/ws-auth.go

@@ -33,6 +33,10 @@ func getToken(req *restful.Request) string {
 
 	token := req.HeaderParameter("Authorization")
 
+	if token == "" {
+		return req.QueryParameter("token")
+	}
+
 	if !strings.HasPrefix(token, bearerPrefix) {
 		return ""
 	}

cmd/dkl-local-server/ws-configs.go

@@ -45,6 +45,8 @@ func writeNewConfig(reader io.Reader) (err error) {
 	}
 
 	err = os.Rename(out.Name(), cfgPath)
+
+	updateState()
 	return
 }
 

cmd/dkl-local-server/ws-downloads.go

@@ -0,0 +1,150 @@
+package main
+
+import (
+	"crypto/rand"
+	"encoding/base32"
+	"log"
+	"net/http"
+	"strconv"
+	"time"
+
+	restful "github.com/emicklei/go-restful"
+	"m.cluseau.fr/go/cow"
+)
+
+type DownloadSpec struct {
+	Kind   string
+	Name   string
+	Assets []string
+
+	createdAt time.Time
+}
+
+func wsAuthorizeDownload(req *restful.Request, resp *restful.Response) {
+	var spec DownloadSpec
+
+	if err := req.ReadEntity(&spec); err != nil {
+		wsError(resp, err)
+		return
+	}
+
+	if spec.Kind == "" || spec.Name == "" || len(spec.Assets) == 0 {
+		resp.WriteErrorString(http.StatusBadRequest, "missing data")
+		return
+	}
+
+	randBytes := make([]byte, 32)
+	_, err := rand.Read(randBytes)
+	if err != nil {
+		wsError(resp, err)
+		return
+	}
+
+	token := base32.StdEncoding.WithPadding(base32.NoPadding).EncodeToString(randBytes)
+
+	spec.createdAt = time.Now()
+
+	wState.Change(func(v *State) {
+		cow.MapSet(&v.Downloads, token, spec)
+	})
+
+	log.Printf("download token created for %s %q, assets %q", spec.Kind, spec.Name, spec.Assets)
+
+	resp.WriteAsJson(token)
+}
+
+func wsDownload(req *restful.Request, resp *restful.Response) {
+	token := req.PathParameter("token")
+	asset := req.PathParameter("asset")
+
+	if token == "" || asset == "" {
+		wsNotFound(req, resp)
+		return
+	}
+
+	var spec DownloadSpec
+	found := false
+	wState.Change(func(v *State) {
+		var ok bool
+		spec, ok = v.Downloads[token]
+		if !ok {
+			return
+		}
+
+		newAssets := make([]string, 0, len(spec.Assets))
+		for _, a := range spec.Assets {
+			if a == asset {
+				found = true
+			} else {
+				newAssets = append(newAssets, a)
+			}
+		}
+
+		if !found {
+			return
+		}
+
+		cow.Map(&v.Downloads)
+
+		if len(newAssets) == 0 {
+			delete(v.Downloads, token)
+		} else {
+			spec.Assets = newAssets
+			v.Downloads[token] = spec
+		}
+	})
+
+	if !found {
+		wsNotFound(req, resp)
+		return
+	}
+
+	log.Printf("download via token %q", token)
+
+	cfg, err := readConfig()
+	if err != nil {
+		wsError(resp, err)
+		return
+	}
+
+	setHeader := func(ext string) {
+		resp.AddHeader("Content-Disposition", "attachment; filename="+strconv.Quote(spec.Kind+"_"+spec.Name+"_"+asset+ext))
+	}
+
+	switch spec.Kind {
+	case "cluster":
+		cluster := cfg.ClusterByName(spec.Name)
+		if cluster == nil {
+			wsNotFound(req, resp)
+			return
+		}
+
+		switch asset {
+		case "addons":
+			setHeader(".yaml")
+			resp.Write([]byte(cluster.Addons))
+
+		default:
+			wsNotFound(req, resp)
+		}
+
+	case "host":
+		host := cfg.Host(spec.Name)
+		if host == nil {
+			wsNotFound(req, resp)
+			return
+		}
+
+		switch asset {
+		case "config", "bootstrap-config":
+			setHeader(".yaml")
+		default:
+			setHeader("")
+		}
+
+		renderHost(resp.ResponseWriter, req.Request, asset, host, cfg)
+
+	default:
+		wsNotFound(req, resp)
+	}
+}

cmd/dkl-local-server/ws-public.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"net/http"
+
+	restful "github.com/emicklei/go-restful"
+)
+
+func wsUnlockStore(req *restful.Request, resp *restful.Response) {
+	var passphrase string
+	err := req.ReadEntity(&passphrase)
+	if err != nil {
+		resp.WriteError(http.StatusBadRequest, err)
+		return
+	}
+
+	if err := unlockSecretStore([]byte(passphrase)); err != nil {
+		err.WriteJSON(resp.ResponseWriter)
+		return
+	}
+
+	resp.WriteEntity(*adminToken)
+}

cmd/dkl-local-server/ws.go

@@ -16,11 +16,35 @@ import (
 )
 
 func registerWS(rest *restful.Container) {
+	// public-level APIs
+	{
+		ws := &restful.WebService{}
+		ws.
+			Path("/public").
+			Produces("application/json").
+			Consumes("application/json").
+			Route(ws.POST("/unlock-store").To(wsUnlockStore).
+				Reads("").
+				Writes("").
+				Doc("Try to unlock the store")).
+			Route(ws.GET("/downloads/{token}/{asset}").To(wsDownload).
+				Param(ws.PathParameter("token", "the download token")).
+				Param(ws.PathParameter("asset", "the requested asset")).
+				Doc("Fetch an asset via a download token"))
+
+		rest.Add(ws)
+	}
+
 	// Admin-level APIs
 	ws := &restful.WebService{}
-	ws.Filter(adminAuth).
+	ws.
+		Filter(adminAuth).
 		HeaderParameter("Authorization", "Admin bearer token")
 
+	// - downloads
+	ws.Route(ws.POST("/authorize-download").To(wsAuthorizeDownload).
+		Doc("Create a download token for the given download"))
+
 	// - configs API
 	ws.Route(ws.POST("/configs").To(wsUploadConfig).
 		Doc("Upload a new current configuration, archiving the previous one"))
@@ -84,6 +108,7 @@ func registerWS(rest *restful.Container) {
 
 	// Hosts API
 	ws = &restful.WebService{}
+	ws.Produces("application/json")
 	ws.Path("/me")
 	ws.Filter(hostsAuth).
 		HeaderParameter("Authorization", "Host or admin bearer token")

gen-api-js.sh

@@ -0,0 +1 @@
+docker run --rm --net=host --user $(id -u) -v ${PWD}:/local swaggerapi/swagger-codegen-cli generate -i http://[::1]:7606/swagger.json -l javascript -o /local/js/api/

go.mod

@@ -66,4 +66,5 @@ require (
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 	k8s.io/klog/v2 v2.90.0 // indirect
 	k8s.io/utils v0.0.0-20230115233650-391b47cb4029 // indirect
+	m.cluseau.fr/go v0.0.0-20230205163051-2d3050134ad5 // indirect
 )

go.sum

@@ -1301,6 +1301,8 @@ k8s.io/klog/v2 v2.90.0 h1:VkTxIV/FjRXn1fgNNcKGM8cfmL1Z33ZjXRTVxKCoF5M=
 k8s.io/klog/v2 v2.90.0/go.mod h1:y1WjHnz7Dj687irZUWR/WLkLc5N1YHtjLdmgWjndZn0=
 k8s.io/utils v0.0.0-20230115233650-391b47cb4029 h1:L8zDtT4jrxj+TaQYD0k8KNlr556WaVQylDXswKmX+dE=
 k8s.io/utils v0.0.0-20230115233650-391b47cb4029/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
+m.cluseau.fr/go v0.0.0-20230205163051-2d3050134ad5 h1:ss7MlpIRrkji6QhhRn4sTkOf44Y6f3roO+7kFXs0Q0U=
+m.cluseau.fr/go v0.0.0-20230205163051-2d3050134ad5/go.mod h1:1DYAavEumEsHasA2RbRUExaEodBB2NAYD+IcwmgVkRM=
 novit.nc/direktil/pkg v0.0.0-20220221171542-fd3ce3a1491b/go.mod h1:zwTVO6U0tXFEaga73megQIBK7yVIKZJVePaIh/UtdfU=
 novit.tech/direktil/pkg v0.0.0-20220331152412-40403eca850f h1:Ka7zFkP01l4TW9JSmQQzaYVOq0i+qf+JIWAfyoreoSk=
 novit.tech/direktil/pkg v0.0.0-20220331152412-40403eca850f/go.mod h1:2Mir5x1eT/e295WeFGzzXa4siunKX4z+rmNPfVsXS0k=

go.work.sum

@@ -0,0 +1,2 @@
+github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
+github.com/jhump/protoreflect v1.12.0 h1:1NQ4FpWMgn3by/n1X0fbeKEUxP1wBt7+Oitpv01HR10=

html/html.go

@@ -0,0 +1,6 @@
+package dlshtml
+
+import "embed"
+
+//go:embed favicon.ico ui
+var FS embed.FS

html/ui/app.css

@@ -0,0 +1,19 @@
+
+.downloads {
+    display: flex;
+    align-content: stretch;
+}
+
+.downloads > * {
+    margin-left: 6pt;
+}
+.downloads > *:first-child {
+    margin-left: 0;
+}
+
+.downloads > div {
+    display: flex;
+    flex-flow: column;
+    max-height: 100pt;
+    overflow: auto;
+}

html/ui/index.html

@@ -0,0 +1,87 @@
+<!doctype html>
+<html>
+<head>
+<title>Direktil Local Server</title>
+<style>
+@import url('./style.css');
+@import url('./app.css');
+</style>
+<script src="js/jsonpatch.min.js" crossorigin="anonymous"></script>
+<script src="js/app.js" type="module" defer></script>
+<body>
+
+<div id="app">
+<header>
+    <div id="logo">
+        <img src="/favicon.ico" />
+        <span>Direktil Local Server</span>
+    </div>
+    <div class="utils">
+        <span id="login-hdr" v-if="session.token">
+            Logged in
+            <button class="link" @click="copyText(session.token)">&#x1F5D0;</button>
+        </span>
+
+        <span id="uiHash">ui <code>{{ uiHash || '-----' }}</code></span>
+
+        <span class="green" v-if="publicState">&#x1F5F2;</span>
+        <span class="red"   v-else            >&#x1F5F2;</span>
+    </div>
+</header>
+
+<div class="error" v-if="error">
+    <button class="btn-close" @click="error=null">&times;</button>
+    <div class="code" v-if="error.code">{{ error.code }}</div>
+    <div class="message">{{ error.message }}</div>
+</div>
+
+<template v-if="!publicState">
+    <p>Not connected.</p>
+</template>
+<template v-else-if="publicState.Store.New">
+    <p>Store is new.</p>
+    <form @submit="unlockStore" action="/public/unlock-store">
+        <input type="password" v-model="forms.store.pass1" name="passphrase" />
+        <input type="password" v-model="forms.store.pass2" />
+        <input type="submit" value="initialize" :disabled="!forms.store.pass1 || forms.store.pass1 != forms.store.pass2" />
+    </form>
+</template>
+<template v-else-if="!publicState.Store.Open">
+    <p>Store is not open.</p>
+    <form @submit="unlockStore" action="/public/unlock-store">
+        <input type="password" name="passphrase" v-model="forms.store.pass1" />
+        <input type="submit" value="unlock" :disabled="!forms.store.pass1" />
+    </form>
+</template>
+<template v-else-if="!state">
+    <p v-if="!session.token">Not logged in.</p>
+    <p v-else>Invalid token</p>
+
+    <form @submit="setToken">
+        <input type="password" v-model="forms.setToken" />
+        <input type="submit" value="set token"/>
+    </form>
+</template>
+<template v-else>
+  <div v-if="state.Clusters" id="clusters">
+    <h2>Clusters</h2>
+
+    <div class="sheets">
+        <Cluster v-for="c in state.Clusters" :cluster="c" :token="session.token" :state="state" />
+    </div>
+  </div>
+
+  <div v-if="state.Hosts" id="hosts">
+    <h2>Hosts</h2>
+
+    <div class="sheets">
+        <Host v-for="h in state.Hosts" :host="h" :token="session.token" :state="state" />
+    </div>
+  </div>
+
+  <pre v-if="false">{{ state }}</pre>
+</template>
+</div>
+
+</body>
+</html>

html/ui/js/Cluster.js

@@ -0,0 +1,16 @@
+
+import Downloads from './Downloads.js';
+
+export default {
+    components: { Downloads },
+    props: [ 'cluster', 'token', 'state' ],
+    template: `
+<div class="cluster">
+  <div class="title">Cluster {{ cluster.Name }}</div>
+  <div class="section">Downloads</div>
+  <section class="downloads">
+    <Downloads :token="token" :state="state" kind="cluster" :name="cluster.Name" />
+  </section>
+</div>
+`
+}

html/ui/js/Downloads.js

@@ -0,0 +1,66 @@
+
+export default {
+    props: [ 'kind', 'name', 'token', 'state' ],
+    data() {
+        return { createDisabled: false, selectedAssets: {} }
+    },
+    computed: {
+        availableAssets() {
+            return {
+                cluster: ['addons'],
+                host: [
+                    "kernel",
+                    "initrd-v2",
+                    "bootstrap.tar",
+                    "boot-v2.iso",
+                    "config",
+                    "boot.iso",
+                    "boot.tar",
+                    "boot-efi.tar",
+                    "boot.img",
+                    "boot.img.gz",
+                    "boot.img.lz4",
+                    "bootstrap-config",
+                    "initrd",
+                    "ipxe",
+                ],
+            }[this.kind]
+        },
+        downloads() {
+            let ret = []
+            Object.entries(this.state.Downloads)
+              .filter(e => { let d=e[1]; return d.Kind == this.kind && d.Name == this.name })
+              .forEach(e => {
+                let token= e[0], d = e[1]
+                d.Assets.forEach(asset => {
+                    ret.push({name: asset, url: '/public/downloads/'+token+'/'+asset})
+                })
+              })
+          return ret
+        },
+        assets() {
+            return this.availableAssets.filter(a => this.selectedAssets[a])
+        },
+    },
+    methods: {
+        createToken() {
+            event.preventDefault()
+            this.createDisabled = true
+
+            fetch('/authorize-download', {
+                method: 'POST',
+                body: JSON.stringify({Kind: this.kind, Name: this.name, Assets: this.assets}),
+                headers: { 'Authorization': 'Bearer ' + this.token },
+            }).then((resp) => resp.json())
+              .then((token) => { this.selectedAssets = {}; this.createDisabled = false })
+              .catch((e) => { alert('failed to create link'); this.createDisabled = false })
+        },
+    },
+    template: `<div class="downloads">
+  <div class="options">
+    <span v-for="asset in availableAssets"><label><input type="checkbox" v-model="selectedAssets[asset]" />&nbsp;{{ asset }}</label></span>
+  </div>
+  <button :disabled="createDisabled || assets.length==0" @click="createToken">+</button>
+  <div><a v-for="d in downloads" target="_blank" :href="d.url">{{ d.name }}</a></div>
+</div>`
+}

html/ui/js/Host.js

@@ -0,0 +1,21 @@
+
+import Downloads from './Downloads.js';
+
+export default {
+    components: { Downloads },
+    props: [ 'host', 'token', 'state' ],
+    template: `
+<div class="host">
+  <div class="title">Host {{ host.Name }}</div>
+  <section>
+    <template v-for="ip in host.IPs">
+        {{ ip }}
+    </template>
+  </section>
+  <div class="section">Downloads</div>
+  <section>
+    <Downloads :token="token" :state="state" kind="host" :name="host.Name" />
+  </section>
+</div>
+`
+}

html/ui/js/app.js

@@ -0,0 +1,162 @@
+
+import { createApp } from './vue.esm-browser.js';
+
+import Cluster from './Cluster.js';
+import Host    from './Host.js';
+
+createApp({
+    components: { Cluster, Host },
+    data() {
+        return {
+            forms: {
+                store: {  },
+            },
+            session: {},
+            error: null,
+            publicState: null,
+            uiHash: null,
+            watchingState: false,
+            state: null,
+        }
+    },
+    mounted() {
+        this.session = JSON.parse(sessionStorage.state || "{}")
+        this.watchPublicState()
+    },
+    watch: {
+        session: {
+            deep: true,
+            handler(v) {
+                sessionStorage.state = JSON.stringify(v)
+
+                if (v.token && !this.watchingState) {
+                    this.watchState()
+                    this.watchingState = true
+                }
+            }
+        },
+        publicState: {
+            deep: true,
+            handler(v) {
+                if (v) {
+                    if (this.uiHash && v.UIHash != this.uiHash) {
+                        console.log("reloading")
+                        location.reload()
+                    } else {
+                        this.uiHash = v.UIHash
+                    }
+                }
+            },
+        }
+    },
+
+    methods: {
+        copyText(text) {
+            event.preventDefault()
+            window.navigator.clipboard.writeText(text)
+        },
+        setToken() {
+            event.preventDefault()
+            this.session.token = this.forms.setToken
+            this.forms.setToken = null
+        },
+        unlockStore() {
+            this.apiPost('/public/unlock-store', this.forms.store.pass1, (v) => {
+                this.forms.store = {}
+
+                if (v) {
+                    this.session.token = v
+                    if (!this.watchingState) {
+                        this.watchState()
+                        this.watchingState = true
+                    }
+                }
+            })
+        },
+        apiPost(action, data, onload) {
+            event.preventDefault()
+
+            if (data === undefined) {
+                throw("action " + action + ": no data")
+            }
+
+            /* TODO
+            fetch(action, {
+                method: 'POST',
+                body: JSON.stringify(data),
+            })
+              .then((response) => response.json())
+              .then((result) => onload)
+            // */
+
+            var xhr = new XMLHttpRequest()
+
+            xhr.responseType = 'json'
+            // TODO spinner, pending aciton notification, or something
+            xhr.onerror = () => {
+                // this.actionResults.splice(idx, 1, {...item, done: true, failed: true })
+            }
+            xhr.onload = (r) => {
+                if (xhr.status != 200) {
+                    this.error = xhr.response
+                    return
+                }
+                // this.actionResults.splice(idx, 1, {...item, done: true, resp: xhr.responseText})
+                this.error = null
+                if (onload) {
+                    onload(xhr.response)
+                }
+            }
+
+            xhr.open("POST", action)
+            xhr.setRequestHeader('Accept', 'application/json')
+            xhr.setRequestHeader('Content-Type', 'application/json')
+            if (this.session.token) {
+                xhr.setRequestHeader('Authorization', 'Bearer '+this.session.token)
+            }
+            xhr.send(JSON.stringify(data))
+        },
+        download(url) {
+            event.target.target = '_blank'
+            event.target.href = this.downloadLink(url)
+        },
+        downloadLink(url) {
+            // TODO once-shot download link
+            return url + '?token=' + this.session.token
+        },
+        watchPublicState() {
+            this.watchStream('publicState', '/public-state')
+        },
+        watchState() {
+            this.watchStream('state', '/state', true)
+        },
+        watchStream(field, path, withToken) {
+            let evtSrc = new EventSource(path + (withToken ? '?token='+this.session.token : ''));
+            evtSrc.onmessage = (e) => {
+                let update = JSON.parse(e.data)
+
+                console.log("watch "+path+":", update)
+
+                if (update.err) {
+                    console.log("watch error from server:", err)
+                }
+                if (update.set) {
+                    this[field] = update.set
+                }
+                if (update.p) { // patch
+                    new jsonpatch.JSONPatch(update.p, true).apply(this[field])
+                }
+            }
+            evtSrc.onerror = (e) => {
+                // console.log("event source " + path + " error:", e)
+                if (evtSrc) evtSrc.close()
+
+                this[field] = null
+
+                window.setTimeout(() => { this.watchStream(field, path, withToken) }, 1000)
+            }
+        },
+    }
+
+}).mount('#app')
+

html/ui/style.css

@@ -0,0 +1,127 @@
+body {
+    background: white;
+}
+
+button[disabled] {
+    opacity: 0.5;
+}
+
+a[href], a[href]:visited, button.link {
+    border: none;
+    color: blue;
+    background: none;
+    cursor: pointer;
+    text-decoration: none;
+}
+
+table {
+    border-collapse: collapse;
+}
+th, td {
+    border-left:   dotted 1pt;
+    border-right:  dotted 1pt;
+    border-bottom: dotted 1pt;
+    padding: 2pt 4pt;
+}
+tr:first-child > th {
+    border-top: dotted 1pt;
+}
+th, tr:last-child > td {
+    border-bottom: solid 1pt;
+}
+
+.flat > * { margin-left: 1ex; }
+.flat > *:first-child { margin-left: 0; }
+
+.green { color: green; }
+.red   { color: red; }
+
+@media (prefers-color-scheme: dark) {
+  body {
+    background: black;
+    color: orange;
+  }
+  button, input[type=submit] {
+    background: #333;
+    color: #eee;
+  }
+  a[href], button.link {
+    border: none;
+    color: #31b0fa;
+  }
+
+  .red { color: #c00; }
+}
+
+header {
+    display: flex;
+    align-items: center;
+    border-bottom: 2pt solid;
+    margin: 0 0 1em 0;
+    padding: 1ex;
+    justify-content: space-between;
+}
+#logo > img {
+    vertical-align: middle;
+}
+header .utils > * {
+    margin-left: 1ex;
+}
+
+.error {
+    display: flex;
+    position: relative;
+    background: rgba(255,0,0,0.2);
+    border: 1pt solid red;
+    justify-content: space-between;
+    align-items: center;
+}
+.error .btn-close,
+.error .code {
+    background: #600;
+    color: white;
+    font-weight: bold;
+    border: none;
+    align-self: stretch;
+    padding: 1ex 1em;
+}
+.error .code {
+    order: 1;
+
+    display: flex;
+    align-items: center;
+    text-align: center;
+}
+.error .message {
+    order: 2;
+    padding: 1ex 2em;
+}
+.error .btn-close {
+    order: 3;
+}
+
+.sheets {
+    display: flex;
+    align-items: stretch;
+}
+.sheets > div {
+    margin: 0 1ex;
+    border: 1pt solid;
+    border-radius: 6pt;
+}
+.sheets .title {
+    text-align: center;
+    font-weight: bold;
+    font-size: large;
+    padding: 2pt 6pt;
+    background: rgba(127,127,127,0.5);
+}
+.sheets .section {
+    padding: 2pt 6pt 2pt 6pt;
+    font-weight: bold;
+    border-top: 1px dotted;
+}
+.sheets section {
+    margin: 2pt 6pt 6pt 6pt;
+}
+

install

@@ -0,0 +1,2 @@
+#! /bin/sh
+go install -trimpath ./cmd/...

modd.conf

@@ -1,10 +1,22 @@
-**/*.go go.mod go.sum Dockerfile {
+modd.conf {}
+
+**/*.go go.mod go.sum {
   prep: go test ./...
-  prep: go install -trimpath ./cmd/...
+  prep: mkdir -p dist
-  prep: docker build --build-arg GOPROXY=$GOPROXY -t dls .
+  prep: go build -o dist/ -trimpath ./...
+  #prep: docker build --build-arg GOPROXY=$GOPROXY -t dls .
   #daemon +sigterm: /var/lib/direktil/test-run
 }
 
+html/**/* {
+  prep: go build -o dist/ -trimpath ./cmd/dkl-local-server
+}
+
+dist/dkl-local-server {
+  prep: mkdir -p tmp
+  daemon +sigterm: dist/dkl-local-server -data tmp -auto-unlock test
+}
+
 **/*.proto !dist/**/* {
   prep: for mod in @mods; do protoc -I ./ --go_out=plugins=grpc,paths=source_relative:. $mod; done
 }

secretstore/io.go

@@ -0,0 +1,30 @@
+package secretstore
+
+import (
+	"crypto/rand"
+	"encoding/binary"
+	"fmt"
+	"io"
+)
+
+func readFull(in io.Reader, ba []byte) (err error) {
+	_, err = io.ReadFull(in, ba)
+	return
+}
+
+func read[T any](in io.Reader) (v T, err error) {
+	err = binary.Read(in, binary.BigEndian, &v)
+	return
+}
+
+var readSize = read[uint16]
+
+func randRead(ba []byte) (err error) {
+	err = readFull(rand.Reader, ba)
+	if err != nil {
+		err = fmt.Errorf("failed to read random bytes: %w", err)
+		return
+	}
+
+	return
+}

secretstore/mem.go

@@ -0,0 +1,7 @@
+package secretstore
+
+func memzero(ba []byte) {
+	for i := range ba {
+		ba[i] = 0
+	}
+}

secretstore/reader.go

@@ -0,0 +1,68 @@
+package secretstore
+
+import (
+	"crypto/aes"
+	"crypto/cipher"
+	"io"
+)
+
+func (s *Store) NewReader(reader io.Reader) (r io.Reader, err error) {
+	iv := [aes.BlockSize]byte{}
+
+	err = readFull(reader, iv[:])
+	if err != nil {
+		return
+	}
+
+	r = storeReader{reader, s.NewDecrypter(iv)}
+	return
+}
+
+type storeReader struct {
+	reader    io.Reader
+	decrypter cipher.Stream
+}
+
+func (r storeReader) Read(ba []byte) (n int, err error) {
+	n, err = r.reader.Read(ba)
+
+	if n > 0 {
+		r.decrypter.XORKeyStream(ba[:n], ba[:n])
+	}
+
+	return
+}
+
+func (s *Store) NewWriter(writer io.Writer) (r io.Writer, err error) {
+	iv := [aes.BlockSize]byte{}
+
+	if err = randRead(iv[:]); err != nil {
+		return
+	}
+
+	_, err = writer.Write(iv[:])
+	if err != nil {
+		return
+	}
+
+	r = storeWriter{writer, s.NewEncrypter(iv)}
+	return
+}
+
+type storeWriter struct {
+	writer    io.Writer
+	encrypter cipher.Stream
+}
+
+func (r storeWriter) Write(ba []byte) (n int, err error) {
+	if len(ba) == 0 {
+		return
+	}
+
+	encBA := make([]byte, len(ba))
+	r.encrypter.XORKeyStream(encBA, ba)
+
+	n, err = r.writer.Write(encBA)
+
+	return
+}

secretstore/secret-store.go

@@ -0,0 +1,263 @@
+package secretstore
+
+import (
+	"bufio"
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/sha512"
+	"errors"
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"syscall"
+
+	"golang.org/x/crypto/argon2"
+)
+
+type Store struct {
+	unlocked bool
+	key      [32]byte
+	salt     [aes.BlockSize]byte
+	keys     []keyEntry
+}
+
+type keyEntry struct {
+	hash   [64]byte
+	encKey [32]byte
+}
+
+func New() (s *Store) {
+	s = &Store{}
+	syscall.Mlock(s.key[:])
+	return
+}
+
+func Open(path string) (s *Store, err error) {
+	f, err := os.Open(path)
+	if err != nil {
+		return
+	}
+
+	defer f.Close()
+
+	s = New()
+	_, err = s.ReadFrom(bufio.NewReader(f))
+
+	return
+}
+
+func (s *Store) SaveTo(path string) (err error) {
+	f, err := os.OpenFile(path, syscall.O_CREAT|syscall.O_TRUNC|syscall.O_WRONLY, 0600)
+	if err != nil {
+		return
+	}
+
+	defer f.Close()
+
+	out := bufio.NewWriter(f)
+
+	_, err = s.WriteTo(out)
+	if err != nil {
+		return
+	}
+
+	err = out.Flush()
+	if err != nil {
+		return
+	}
+
+	return
+}
+
+func (s *Store) Close() {
+	memzero(s.key[:])
+	syscall.Munlock(s.key[:])
+	s.unlocked = false
+}
+
+func (s *Store) IsNew() bool {
+	return len(s.keys) == 0
+}
+
+func (s *Store) Unlocked() bool {
+	return s.unlocked
+}
+
+func (s *Store) Init(passphrase []byte) (err error) {
+	err = randRead(s.key[:])
+	if err != nil {
+		return
+	}
+	err = randRead(s.salt[:])
+	if err != nil {
+		return
+	}
+
+	s.AddKey(passphrase)
+
+	s.unlocked = true
+
+	return
+}
+
+func (s *Store) ReadFrom(in io.Reader) (n int64, err error) {
+	memzero(s.key[:])
+	s.unlocked = false
+
+	defer func() {
+		if err != nil {
+			log.Output(2, fmt.Sprintf("failed after %d bytes", n))
+		}
+	}()
+
+	readFull := func(ba []byte) {
+		var nr int
+		nr, err = io.ReadFull(in, ba)
+		n += int64(nr)
+	}
+
+	// read the salt
+	readFull(s.salt[:])
+	if err != nil {
+		return
+	}
+
+	// read the (encrypted) keys
+	s.keys = make([]keyEntry, 0)
+	for {
+		k := keyEntry{}
+		readFull(k.hash[:])
+		if err != nil {
+			if err == io.EOF {
+				err = nil
+			}
+			return
+		}
+		readFull(k.encKey[:])
+		if err != nil {
+			return
+		}
+
+		s.keys = append(s.keys, k)
+	}
+}
+
+func (s *Store) WriteTo(out io.Writer) (n int64, err error) {
+	write := func(ba []byte) {
+		var nr int
+		nr, err = out.Write(ba)
+		n += int64(nr)
+	}
+
+	write(s.salt[:])
+	if err != nil {
+		return
+	}
+
+	for _, k := range s.keys {
+		write(k.hash[:])
+		if err != nil {
+			return
+		}
+
+		write(k.encKey[:])
+		if err != nil {
+			return
+		}
+	}
+
+	return
+}
+
+var ErrNoSuchKey = errors.New("no such key")
+
+func (s *Store) Unlock(passphrase []byte) (ok bool) {
+	key, hash := s.keyPairFromPassword(passphrase)
+	memzero(passphrase)
+	defer memzero(key[:])
+
+	var idx = -1
+	for i := range s.keys {
+		if hash == s.keys[i].hash {
+			idx = i
+			break
+		}
+	}
+
+	if idx == -1 {
+		return
+	}
+
+	s.decryptTo(s.key[:], s.keys[idx].encKey[:], &key)
+
+	s.unlocked = true
+	return true
+}
+
+func (s *Store) AddKey(passphrase []byte) {
+	key, hash := s.keyPairFromPassword(passphrase)
+	memzero(passphrase)
+
+	defer memzero(key[:])
+
+	k := keyEntry{hash: hash}
+
+	encKey := s.encrypt(s.key[:], &key)
+	copy(k.encKey[:], encKey)
+
+	s.keys = append(s.keys, k)
+}
+
+func (s *Store) keyPairFromPassword(password []byte) (key [32]byte, hash [64]byte) {
+	keySlice := argon2.IDKey(password, s.salt[:], 1, 64*1024, 4, 32)
+
+	copy(key[:], keySlice)
+	memzero(keySlice)
+
+	hash = sha512.Sum512(key[:])
+
+	return
+}
+
+func (s *Store) NewEncrypter(iv [aes.BlockSize]byte) cipher.Stream {
+	if !s.unlocked {
+		panic("not unlocked")
+	}
+	return newEncrypter(iv, &s.key)
+}
+
+func (s *Store) NewDecrypter(iv [aes.BlockSize]byte) cipher.Stream {
+	if !s.unlocked {
+		panic("not unlocked")
+	}
+	return newDecrypter(iv, &s.key)
+}
+
+func (s *Store) encrypt(src []byte, key *[32]byte) (dst []byte) {
+	dst = make([]byte, len(src))
+	newEncrypter(s.salt, key).XORKeyStream(dst, src)
+	return
+}
+
+func (s *Store) decryptTo(dst []byte, src []byte, key *[32]byte) {
+	newDecrypter(s.salt, key).XORKeyStream(dst, src)
+}
+
+func newEncrypter(iv [aes.BlockSize]byte, key *[32]byte) cipher.Stream {
+	c, err := aes.NewCipher(key[:])
+	if err != nil {
+		panic(fmt.Errorf("failed to init AES: %w", err))
+	}
+
+	return cipher.NewCFBEncrypter(c, iv[:])
+}
+
+func newDecrypter(iv [aes.BlockSize]byte, key *[32]byte) cipher.Stream {
+	c, err := aes.NewCipher(key[:])
+	if err != nil {
+		panic(fmt.Errorf("failed to init AES: %w", err))
+	}
+
+	return cipher.NewCFBDecrypter(c, iv[:])
+}