..

HttpServer.go

@@ -1,12 +1,14 @@
 package main
 
 import (
+	"crypto/subtle"
 	"encoding/json"
 	"fmt"
 	"github.com/gorilla/mux"
 	log "github.com/sirupsen/logrus"
 	"net"
 	"net/http"
+	auth "github.com/abbot/go-http-auth"
 )
 
 
@@ -108,11 +110,11 @@ func (h *HttpServer) doaction(w http.ResponseWriter, r *http.Request, params *Ad
 
 		case "add":
 			host := r.URL.Query().Get("host")
-			_, err := h._database.CreateHost(host)
+			pw, _, err := h._database.CreateHost(host)
 			if err == nil {
 				params.Alerts = append(params.Alerts, Alert{
 					Type: "success",
-					Message: fmt.Sprintf("created host %s", host),
+					Message: fmt.Sprintf("created host %s\npassword: %s", host, pw),
 				})
 			} else {
 				params.Alerts = append(params.Alerts, Alert{
@@ -154,6 +156,7 @@ func (h *HttpServer) adminPage(w http.ResponseWriter, r *http.Request) {
 	params.Alerts = make([]Alert, 0)
 	params.Hosts = make(map[string]string)
 	params.IpAddresses = h._ipAddresses
+	params.LogoutUrl = h._oauth.LogoutUrl
 
 
 	h.doaction(w,r, params)
@@ -161,8 +164,7 @@ func (h *HttpServer) adminPage(w http.ResponseWriter, r *http.Request) {
 	claims, _ := h._oauth.GetClaims(w, token)
 
 
-	params.Email = claims.Email
+	params.Claims = *claims
-	params.Profile = claims.Profile
 
 	if settings.FilterString != nil {
 		params.Hosts =  h._database.GetExistingHosts(*settings.FilterString)
@@ -275,13 +277,35 @@ func (h *HttpServer) updateHandler(w http.ResponseWriter, r *http.Request) {
 	log.Info("authorization successful.")
 	log.Info("will update host ", host, " ip ", myip)
 
+
+	if !h._database.ExistHost(host) {
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	} else {
+		err := h._dnsclient.Update(host, myip)
+		if err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+		} else {
 			w.WriteHeader(http.StatusOK)
 		}
+	}
+
+
+
+}
 
 func (h *HttpServer) Listen() {
 	h._server.ListenAndServe()
 }
 
+func Secret(user, realm string) string {
+	if user == "john" {
+		// password is "hello"
+		return "$1$dlPL2MqE$oQmn16q49SqdmhenQuNgs1"
+	}
+	return ""
+}
+
 func CreateHttpServer(config *Config) *HttpServer {
 
 	var httpserver *HttpServer
@@ -315,6 +339,10 @@ func CreateHttpServer(config *Config) *HttpServer {
 		Handler: r,
 	}
 
+	auth := auth.NewBasicAuthenticator(config.AuthRealm, func(user string) {
+		return httpserver._database._db.Get("hosts/"+ user)
+	})
+
 	r.HandleFunc("/register", httpserver.registerHandler)
 	r.HandleFunc("/update", httpserver.updateHandler)
 	r.HandleFunc("/admin", httpserver.adminPage)

config.go

@@ -10,5 +10,6 @@ type Config struct {
 	OAuth2ClientSecret string
 	IssuerUrl          string
 	ZoneUrl			   string
+	AuthRealm 		   string
 
 }

database.go

@@ -1,23 +1,19 @@
 package main
 
 import (
-	"bytes"
-	"crypto/rand"
 	"crypto/sha256"
-	"crypto/sha512"
-	"encoding/base64"
 	"errors"
 	"github.com/miekg/dns"
+	"github.com/patrickmn/go-cache"
+	password "github.com/sethvargo/go-password/password"
 	log "github.com/sirupsen/logrus"
 	"github.com/syndtr/goleveldb/leveldb"
 	"github.com/syndtr/goleveldb/leveldb/util"
-	"math"
+	bcrypt "golang.org/x/crypto/bcrypt"
-	"math/big"
 	"os"
 	"path"
 	"strings"
 	"time"
-	"github.com/patrickmn/go-cache"
 )
 
 type Database struct {
@@ -57,11 +53,11 @@ func (d *Database) Authorize(host string, token_user string) bool {
 		return false
 	}
 
-	if len(token) < sha512.Size {
+	if len(token) < sha256.Size {
 		return false
 	}
 
-	if len(token_user) < sha512.Size {
+	if len(token_user) < sha256.Size {
 		return false
 	}
 
@@ -74,24 +70,21 @@ func (d *Database) Authorize(host string, token_user string) bool {
 	return false
 }
 
-func generateToken() string {
+func generateToken() (string, []byte, error) {
-	maxInt := big.NewInt(math.MaxInt64)
+	pw, err := password.Generate(64, 10, 10, false, false)
-	randInt, err := rand.Int(rand.Reader, maxInt)
 	if err != nil {
-		log.Fatal(err)
+		return "", nil, err
 	}
 
-	h_plain := []byte(randInt.String() + time.Now().String())
 
-	h:= sha256.Sum256(h_plain)
+	hash, errHash := bcrypt.GenerateFromPassword([]byte(pw), bcrypt.DefaultCost)
 
-	for i:=0;i<10000; i++ {
+	if errHash != nil {
-		h = sha256.Sum256(h[:])
+		return "", nil , errHash
 	}
 
-	var buf bytes.Buffer
+
-	base64.NewEncoder(base64.URLEncoding, &buf).Write(h[:])
+	return pw, hash, nil
-	return buf.String()
 }
 
 func (d *Database) IsBannedHost(host string) bool {
@@ -119,24 +112,27 @@ func (d *Database) IncrementBanHost(host string) {
 }
 
 
-func (d *Database) CreateHost(host string) (string, error) {
+func (d *Database) CreateHost(host string) (string, []byte, error) {
 	if d.ExistHost(host) {
-		return "", errors.New("host already existent")
+		return "", nil, errors.New("host already existent")
 	}
 
 	if host == "" {
-		return "", errors.New("given hostname is empty")
+		return "", nil, errors.New("given hostname is empty")
 	}
 
 	if _, ok := dns.IsDomainName(host + "." + d._zone); !ok {
-		return "", errors.New("given hostname is invalid")
+		return "", nil, errors.New("given hostname is invalid")
 	}
 
 
-	token := generateToken()
+	pw, hash, errToken := generateToken()
-	d._db.Put([]byte("hosts/" + host), []byte(token), nil)
+	if errToken != nil {
+		return "", nil, errToken
+	}
 
-	return token, nil
+	d._db.Put([]byte("hosts/" + host), hash, nil)
+	return pw, hash, nil
 }
 
 

go.mod

@@ -3,11 +3,14 @@ module ddnsService
 go 1.15
 
 require (
+	github.com/abbot/go-http-auth v0.4.0
 	github.com/coreos/go-oidc/v3 v3.0.0
 	github.com/gorilla/mux v1.8.0
 	github.com/miekg/dns v1.1.35
 	github.com/patrickmn/go-cache v2.1.0+incompatible
+	github.com/sethvargo/go-password v0.2.0
 	github.com/sirupsen/logrus v1.7.0
 	github.com/syndtr/goleveldb v1.0.0
+	golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550
 	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
 )

go.sum

@@ -1,4 +1,6 @@
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/abbot/go-http-auth v0.4.0 h1:QjmvZ5gSC7jm3Zg54DqWE/T5m1t2AfDu6QlXJT0EVT0=
+github.com/abbot/go-http-auth v0.4.0/go.mod h1:Cz6ARTIzApMJDzh5bRMSUou6UMSp0IEXg9km/ci7TJM=
 github.com/coreos/go-oidc/v3 v3.0.0 h1:/mAA0XMgYJw2Uqm7WKGCsKnjitE/+A0FFbOmiRJm7LQ=
 github.com/coreos/go-oidc/v3 v3.0.0/go.mod h1:rEJ/idjfUyfkBit1eI1fvyr+64/g9dcKpAm8MJMesvo=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -27,6 +29,8 @@ github.com/patrickmn/go-cache v2.1.0+incompatible h1:HRMgzkcYKYpi3C8ajMPV8OFXaaR
 github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sethvargo/go-password v0.2.0 h1:BTDl4CC/gjf/axHMaDQtw507ogrXLci6XRiLc7i/UHI=
+github.com/sethvargo/go-password v0.2.0/go.mod h1:Ym4Mr9JXLBycr02MFuVQ/0JHidNetSgbzutTr3zsYXE=
 github.com/sirupsen/logrus v1.7.0 h1:ShrD1U9pZB12TX0cVy0DtePoCH97K8EtX+mg7ZARUtM=
 github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=

main.go

@@ -4,9 +4,9 @@ func main() {
 
 	config := Config{
 		DataDir: "/var/lib/ddnsService",
-		Addr: ":8999", OAuth2ClientID: "0oa472q93Zu227hXY5d6",
+		Addr: ":8999", OAuth2ClientID: "ddnsService",
-		OAuth2ClientSecret: "sj98SdfZxjkYxUd8NCbyhSuPX1D7kPARDRJ0kVUe",
+		OAuth2ClientSecret: "",
-		IssuerUrl:          "https://dev-1614211.okta.com/oauth2/default",
+		IssuerUrl:          "https://auth.voglfrei.net/auth/realms/master",
 		OAuth2RedirectUrl:  "http://localhost:8999/admin",
 		ZoneUrl: "hub.voglfrei.net"}
 	server := CreateHttpServer(&config)

oauth2.go

@@ -13,15 +13,19 @@ import (
 type OidcClams struct {
 	Email    string `json:"email"`
 	Profile    string `json:"profile"`
+	Username  	string `json:"preferred_username"`
 }
 
 
 type OAuth2 struct {
+	LogoutUrl string `json:"end_session_endpoint"`
+
 	_ctx context.Context
 	_oauth2Config *oauth2.Config
 	_oidcVerifier *oidc.IDTokenVerifier
 	_oidcProvider *oidc.Provider
 	_nonces map[string]string
+
 }
 
 func (o *OAuth2) GetClaims(w http.ResponseWriter, token *oidc.IDToken) (*OidcClams, error) {
@@ -42,6 +46,7 @@ func (o *OAuth2) checkOAuth(w http.ResponseWriter, r *http.Request, allowRedirec
 	if err == nil {
 		log.Info("got id_token cookie")
 		token, err := o._oidcVerifier.Verify(o._ctx, cookie.Value)
+
 		if err != nil {
 			http.Error(w, "Failed to verify ID Token: "+err.Error(), http.StatusInternalServerError)
 			return nil, false
@@ -60,7 +65,6 @@ func (o *OAuth2) checkOAuth(w http.ResponseWriter, r *http.Request, allowRedirec
 				return nil, false
 			}
 			delete(o._nonces, state)
-
 			oauth2Token, err := o._oauth2Config.Exchange(o._ctx, code)
 			if err != nil {
 				http.Error(w, "Failed to exchange token: "+err.Error(), http.StatusInternalServerError)
@@ -72,7 +76,7 @@ func (o *OAuth2) checkOAuth(w http.ResponseWriter, r *http.Request, allowRedirec
 				http.Error(w, "No id_token field in oauth2 token.", http.StatusInternalServerError)
 				return nil, false
 			}
-			log.Info(rawIDToken)
+
 			token, err2 := o._oidcVerifier.Verify(o._ctx, rawIDToken)
 			if err2 != nil {
 				http.Error(w, "Failed to verify ID Token: "+err.Error(), http.StatusInternalServerError)
@@ -99,9 +103,10 @@ func (o *OAuth2) checkOAuth(w http.ResponseWriter, r *http.Request, allowRedirec
 		} else {
 			//no auth code and no bearer -> redirect
 			if allowRedirect {
-				nonce := generateToken()
+				pw, _ , _ := generateToken();
-				o._nonces[nonce] = nonce
+				o._nonces[pw] = pw
-				http.Redirect(w, r, o._oauth2Config.AuthCodeURL(nonce), http.StatusFound)
+
+				http.Redirect(w, r, o._oauth2Config.AuthCodeURL(pw), http.StatusFound)
 			}
 
 			return nil, false
@@ -123,7 +128,6 @@ func CreateOAuth2(config *Config) (*OAuth2, error) {
 
 	// Configure an OpenID Connect aware OAuth2 client.
 	verifier := provider.Verifier(oidcConfig)
-
 	oauthConfig := oauth2.Config{
 		ClientID:     config.OAuth2ClientID,
 		ClientSecret: config.OAuth2ClientSecret,
@@ -132,11 +136,15 @@ func CreateOAuth2(config *Config) (*OAuth2, error) {
 		Scopes:       []string{oidc.ScopeOpenID, "profile", "email"},
 	}
 
-	return &OAuth2{
+	ret := OAuth2{
 		_ctx: ctx,
 		_oauth2Config: &oauthConfig,
 		_oidcVerifier: verifier,
 		_oidcProvider: provider,
 		_nonces: make(map[string]string),
-	}, nil
+	}
+
+	err = provider.Claims(&ret)
+
+	return &ret, nil
 }

renderer.go

@@ -7,10 +7,10 @@ import (
 
 type AdminPageParams struct {
 	Hosts map[string]string
-	Email string
+	Claims OidcClams
-	Profile string
 	Alerts []Alert
 	IpAddresses map[string][]string
+	LogoutUrl string
 
 }
 

resources/templates/adminpage.html

@@ -13,12 +13,11 @@
                 <div class="container">
                     <div class="row">
                         <div class="col-8">
-                            <h5 class="card-title">Logged in as {{.Email}}</h5>
+                            <h5 class="card-title">Logged in as {{.Claims.Username}} ({{.Claims.Email}})</h5>
                         </div>
                         <div class="col-4">
-                            <a class="btn btn-outline-primary" href="#">Logout</a>
+                            <a class="btn btn-outline-primary" href="{{.LogoutUrl}}">Logout</a>
                         </div>
-                        <p class="card-text">{{.Profile}}</p>
                     </div>
                 </div>