2020-05-30 23:14:40 +00:00
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package main
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import (
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"context"
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"encoding/json"
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"fmt"
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"log"
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"net/http"
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2020-08-14 09:24:32 +00:00
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"os"
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2020-11-05 09:11:17 +00:00
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"path/filepath"
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2020-05-30 23:14:40 +00:00
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"strings"
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"time"
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2020-08-14 09:24:32 +00:00
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"git.rootprojects.org/root/telebit/dbg"
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2020-07-20 22:20:59 +00:00
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"git.rootprojects.org/root/telebit/mgmt/authstore"
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2020-05-30 23:14:40 +00:00
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"github.com/dgrijalva/jwt-go"
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"github.com/go-chi/chi"
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"github.com/go-chi/chi/middleware"
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)
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type MgmtClaims struct {
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Slug string `json:"slug"`
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jwt.StandardClaims
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}
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var presenters = make(chan *Challenge)
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var cleanups = make(chan *Challenge)
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2020-11-05 09:11:17 +00:00
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func routeStatic() chi.Router {
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r := chi.NewRouter()
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r.Use(middleware.Logger)
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r.Use(middleware.Timeout(15 * time.Second))
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r.Use(middleware.Recoverer)
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r.Get("/.well-known/acme-challenge/{token}", func(w http.ResponseWriter, r *http.Request) {
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//token := chi.URLParam(r, "token")
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2020-11-05 09:40:19 +00:00
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host := r.Host
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2020-11-05 09:11:17 +00:00
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if strings.ContainsAny(host, "/:|\\") {
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host = ""
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}
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tokenPath := filepath.Join(tmpBase, host)
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fsrv := http.FileServer(http.Dir(tokenPath))
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fsrv.ServeHTTP(w, r)
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})
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return r
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}
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2020-05-30 23:14:40 +00:00
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func routeAll() chi.Router {
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go func() {
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for {
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// TODO make parallel?
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// TODO make cancellable?
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ch := <-presenters
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err := provider.Present(ch.Domain, ch.Token, ch.KeyAuth)
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ch.error <- err
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}
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}()
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go func() {
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for {
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// TODO make parallel?
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// TODO make cancellable?
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ch := <-cleanups
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ch.error <- provider.CleanUp(ch.Domain, ch.Token, ch.KeyAuth)
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}
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}()
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r := chi.NewRouter()
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r.Use(middleware.Logger)
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r.Use(middleware.Timeout(15 * time.Second))
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r.Use(middleware.Recoverer)
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r.Route("/api", func(r chi.Router) {
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r.Use(func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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var tokenString string
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if auth := strings.Split(r.Header.Get("Authorization"), " "); len(auth) > 1 {
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// TODO handle Basic auth tokens as well
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tokenString = auth[1]
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}
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//var err2 error = nil
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tok, err := jwt.ParseWithClaims(
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tokenString,
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&MgmtClaims{},
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func(token *jwt.Token) (interface{}, error) {
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2020-08-14 09:24:32 +00:00
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if dbg.Debug {
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fmt.Println("parsed jwt", token)
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}
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2020-05-30 23:14:40 +00:00
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kid, ok := token.Header["kid"].(string)
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if !ok {
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return nil, fmt.Errorf("missing jwt header 'kid' (key id)")
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}
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auth, err := store.Get(kid)
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if nil != err {
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return nil, fmt.Errorf("invalid jwt header 'kid' (key id)")
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}
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claims := token.Claims.(*MgmtClaims)
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jti := claims.Id
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if "" == jti {
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return nil, fmt.Errorf("missing jwt payload 'jti' (jwt id / nonce)")
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}
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iat := claims.IssuedAt
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if 0 == iat {
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return nil, fmt.Errorf("missing jwt payload 'iat' (issued at)")
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}
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exp := claims.ExpiresAt
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if 0 == exp {
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return nil, fmt.Errorf("missing jwt payload 'exp' (expires at)")
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}
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if "" != claims.Slug {
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return nil, fmt.Errorf("extra jwt payload 'slug' (unknown)")
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}
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claims.Slug = auth.Slug
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2020-06-22 06:34:42 +00:00
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if "" != claims.Subject && auth.Slug != claims.Subject {
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return nil, fmt.Errorf("invalid jwt payload 'sub' (mismatch)")
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}
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2020-07-22 03:56:46 +00:00
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claims.Subject = claims.Slug
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2020-06-22 06:34:42 +00:00
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claims.Issuer = primaryDomain
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2020-07-22 03:56:46 +00:00
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claims.Audience = fmt.Sprintf("wss://%s/ws", relayDomain)
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2020-05-30 23:14:40 +00:00
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/*
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// a little misdirection there
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mac := hmac.New(sha256.New, auth.MachinePPID)
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_ = mac.Write([]byte(auth.SharedKey))
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_ = mac.Write([]byte(fmt.Sprintf("%d", exp)))
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return []byte(auth.SharedKey), nil
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*/
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2020-06-22 06:34:42 +00:00
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//fmt.Println("ppid:", auth.MachinePPID)
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2020-05-31 12:19:41 +00:00
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2020-05-30 23:14:40 +00:00
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return []byte(auth.MachinePPID), nil
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},
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)
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2020-05-31 12:19:41 +00:00
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ctx := r.Context()
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2020-05-30 23:14:40 +00:00
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if nil != tok {
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if tok.Valid {
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2020-05-31 12:19:41 +00:00
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ctx = context.WithValue(ctx, MWKey("token"), tok)
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ctx = context.WithValue(ctx, MWKey("claims"), tok.Claims)
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ctx = context.WithValue(ctx, MWKey("valid"), true)
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2020-08-14 09:24:32 +00:00
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fmt.Println("[auth] Token is fully valid:")
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fmt.Println(ctx.Value(MWKey("claims")))
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} else {
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fmt.Println("[auth] Token was parsed, but NOT valid:", tok)
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2020-05-30 23:14:40 +00:00
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}
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}
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2020-08-14 09:24:32 +00:00
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if nil != err {
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fmt.Println("[auth] Token is NOT valid due to error:", err)
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ctx = context.WithValue(ctx, MWKey("error"), err)
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}
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2020-05-30 23:14:40 +00:00
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next.ServeHTTP(w, r.WithContext(ctx))
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})
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})
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handleDNSRoutes(r)
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handleDeviceRoutes(r)
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2020-06-01 07:38:18 +00:00
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r.Get("/inspect", func(w http.ResponseWriter, r *http.Request) {
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2020-05-31 13:02:46 +00:00
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ctx := r.Context()
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claims, ok := ctx.Value(MWKey("claims")).(*MgmtClaims)
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if !ok {
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2020-08-14 09:24:32 +00:00
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msg := `{"error":"failure to ping: 3", "code":"E_TOKEN"}`
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2020-05-31 13:02:46 +00:00
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fmt.Println("touch no claims", claims)
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http.Error(w, msg+"\n", http.StatusBadRequest)
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return
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}
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2020-06-22 06:34:42 +00:00
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w.Write([]byte(fmt.Sprintf(
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2020-07-22 03:56:46 +00:00
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`{ "sub": "%s", "aud": "%s", "domains": [ "%s.%s" ], "ports": [] }`+"\n",
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2020-06-22 06:34:42 +00:00
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claims.Subject,
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2020-07-22 03:56:46 +00:00
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claims.Audience,
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2020-06-22 06:34:42 +00:00
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claims.Slug,
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primaryDomain,
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)))
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2020-05-31 13:02:46 +00:00
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})
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2020-05-30 23:14:40 +00:00
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r.Route("/register-device", func(r chi.Router) {
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// r.Use() // must NOT have slug '*'
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r.Post("/{otp}", func(w http.ResponseWriter, r *http.Request) {
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sharedKey := chi.URLParam(r, "otp")
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original, err := store.Get(sharedKey)
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2020-08-13 09:48:21 +00:00
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if nil != err {
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2020-08-14 09:24:32 +00:00
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msg := `{"error":"not found", "code":"E_NOT_FOUND"}`
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2020-08-13 09:48:21 +00:00
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log.Printf("/api/register-device/\n")
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log.Println(err)
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http.Error(w, msg, http.StatusNotFound)
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2020-08-14 08:17:13 +00:00
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return
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2020-08-13 09:48:21 +00:00
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}
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2020-05-30 23:14:40 +00:00
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if "" != original.MachinePPID {
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2020-08-14 09:24:32 +00:00
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msg := `{"error":"the presented key has already been used", "code":"E_EXIST"}`
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2020-05-30 23:14:40 +00:00
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log.Printf("/api/register-device/\n")
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log.Println(err)
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2020-08-14 09:24:32 +00:00
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http.Error(w, msg, http.StatusUnprocessableEntity)
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2020-05-30 23:14:40 +00:00
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return
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}
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auth := &authstore.Authorization{}
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decoder := json.NewDecoder(r.Body)
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err = decoder.Decode(&auth)
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// MachinePPID and PublicKey are required. ID must NOT be set. Slug is ignored.
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epoch := time.Time{}
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auth.SharedKey = sharedKey
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if nil != err || "" != auth.ID || "" == auth.MachinePPID ||
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"" == auth.PublicKey || "" == auth.SharedKey ||
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epoch != auth.CreatedAt || epoch != auth.UpdatedAt || epoch != auth.DeletedAt {
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msg, _ := json.Marshal(&struct {
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Error string `json:"error"`
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}{
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Error: "expected JSON in the format {\"machine_ppid\":\"\",\"public_key\":\"\"}",
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})
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http.Error(w, string(msg), http.StatusUnprocessableEntity)
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return
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}
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// TODO hash the PPID and check against the Public Key?
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2020-05-31 12:19:41 +00:00
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pub := authstore.ToPublicKeyString(auth.MachinePPID)
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if pub != auth.PublicKey {
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msg, _ := json.Marshal(&struct {
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Error string `json:"error"`
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}{
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Error: "expected `public_key` to be the first 24 bytes of the hash of the `machine_ppid`",
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})
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http.Error(w, string(msg), http.StatusUnprocessableEntity)
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return
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}
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2020-05-30 23:14:40 +00:00
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original.PublicKey = auth.PublicKey
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original.MachinePPID = auth.MachinePPID
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err = store.Set(original)
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if nil != err {
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2020-08-14 09:24:32 +00:00
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msg := `{"error":"not really sure what happened, but it didn't go well (check the logs)", "code":"E_SERVER"}`
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2020-05-30 23:14:40 +00:00
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log.Printf("/api/register-device/\n")
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log.Println(err)
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http.Error(w, msg, http.StatusInternalServerError)
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return
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}
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result, _ := json.Marshal(auth)
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w.Write(result)
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})
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})
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2020-05-31 12:19:41 +00:00
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r.Post("/ping", func(w http.ResponseWriter, r *http.Request) {
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ctx := r.Context()
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claims, ok := ctx.Value(MWKey("claims")).(*MgmtClaims)
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if !ok {
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2020-08-14 09:24:32 +00:00
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msg := `{"error":"failure to ping: 1", "code":"E_TOKEN"}`
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2020-05-31 12:19:41 +00:00
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http.Error(w, msg+"\n", http.StatusBadRequest)
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return
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}
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fmt.Println("ping pong??", claims)
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err := store.Touch(claims.Slug)
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if nil != err {
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2020-08-14 09:24:32 +00:00
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fmt.Fprintf(os.Stderr, "touch err %s\n", err)
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var msg string
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if err == authstore.ErrNotFound {
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// if the token is valid, touch should ALWAYS work
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msg = `{"error":"failure to ping: inconsistent database data", "code":"E_SERVER"}`
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} else {
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msg = `{"error":"failure to ping: 2", "code":"E_SERVER"}`
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}
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2020-05-31 12:19:41 +00:00
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http.Error(w, msg+"\n", http.StatusBadRequest)
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return
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}
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w.Write([]byte(`{ "success": true }` + "\n"))
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})
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2020-05-30 23:14:40 +00:00
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r.Get("/", func(w http.ResponseWriter, r *http.Request) {
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2020-05-31 12:19:41 +00:00
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w.Write([]byte("Hello\n"))
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2020-05-30 23:14:40 +00:00
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})
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})
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return r
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}
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