implement JWT for anti spam

fix #1

gateway/go.mod

@@ -25,6 +25,7 @@ require (
 	github.com/go-playground/locales v0.13.0 // indirect
 	github.com/go-playground/universal-translator v0.17.0 // indirect
 	github.com/go-playground/validator/v10 v10.4.1 // indirect
+	github.com/golang-jwt/jwt v3.2.2+incompatible // indirect
 	github.com/golang/protobuf v1.4.3 // indirect
 	github.com/gorilla/context v1.1.1 // indirect
 	github.com/gorilla/securecookie v1.1.1 // indirect

gateway/go.sum

@@ -123,6 +123,8 @@ github.com/gogo/googleapis v1.1.0/go.mod h1:gf4bu3Q80BeJ6H1S1vYPm8/ELATdvryBaNFG
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.2.0/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
+github.com/golang-jwt/jwt v3.2.2+incompatible h1:IfV12K8xAKAnZqdXVzCZ+TOjboZ2keLg81eXfW3O+oY=
+github.com/golang-jwt/jwt v3.2.2+incompatible/go.mod h1:8pz2t5EyA70fFQQSrl6XZXzqecmYZeUEB8OUGHkxJ+I=
 github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe/go.mod h1:8vg3r2VgvsThLBIFL93Qb5yWzgyZWhEmBwUJWevAkK0=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20160516000752-02826c3e7903/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=

gateway/main.go

@@ -13,6 +13,7 @@ import (
 var VERSION = "development"
 
 type configData struct {
+	JWTSecret   JWTSecret   `toml"jwt_secret"`
 	EndpointURL string      `toml:"endpoint_url"`
 	XMPP        XMPPService `toml:"xmpp"`
 	Webserver   web.Service `toml:"webserver"`
@@ -42,6 +43,7 @@ func main() {
 	}
 	// just for more beautiful config file - jere
 	config.XMPP.EndpointURL = config.EndpointURL
+	config.XMPP.JWTSecret = config.JWTSecret
 
 	go func() {
 		if err := config.XMPP.Run(); err != nil {
@@ -49,7 +51,7 @@ func main() {
 		}
 	}()
 
-	config.Webserver.ModuleRegister(Bind(&config.XMPP))
+	config.Webserver.ModuleRegister(Bind(&config.XMPP, config.JWTSecret))
 
 	log.Info("startup")
 	if err := config.Webserver.Run(); err != nil {

gateway/token.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"github.com/golang-jwt/jwt"
+	"mellium.im/xmpp/jid"
+)
+
+// JWTSecret the secret
+type JWTSecret string
+
+// JWTToken data field
+type JWTToken struct {
+	jwt.StandardClaims
+	Token string `json:"token"`
+	JID   string `json:"jid"`
+}
+
+// Generate an jwt token by token and jid
+func (s JWTSecret) Generate(jid jid.JID, token string) (string, error) {
+	jwtToken := JWTToken{
+		Token: token,
+		JID:   jid.String(),
+	}
+	claim := jwt.NewWithClaims(jwt.SigningMethodHS512, jwtToken)
+	t, err := claim.SignedString([]byte(s))
+	if err != nil {
+		return "", err
+	}
+	return t, nil
+}
+
+// Read token to token and jid
+func (s JWTSecret) Read(jwtToken string) (jid.JID, string, error) {
+	token, err := jwt.ParseWithClaims(jwtToken, &JWTToken{}, func(token *jwt.Token) (interface{}, error) {
+		return []byte(s), nil
+	})
+	if err != nil {
+		return jid.JID{}, "", err
+	}
+	claims, ok := token.Claims.(*JWTToken)
+	if !ok {
+		return jid.JID{}, "", jwt.ErrInvalidKey
+	}
+	addr, err := jid.Parse(claims.JID)
+	if err != nil {
+		return jid.JID{}, "", err
+	}
+	return addr, claims.Token, nil
+}

gateway/token_test.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"mellium.im/xmpp/jid"
+)
+
+func TestJWT(t *testing.T) {
+	assert := assert.New(t)
+
+	addr := "a@example.org"
+	token := "pushtoken"
+
+	secret := JWTSecret("CHANGEME")
+	jwt, err := secret.Generate(jid.MustParse(addr), token)
+	assert.NoError(err)
+	assert.NoEqual("", jwt)
+
+	jid, t, err := secret.Read(jwt)
+	assert.NoError(err)
+	assert.Equal(addr, jid.String())
+	assert.Equal(t, token)
+}

gateway/web.go

@@ -1,10 +1,10 @@
 package main
 
 import (
-	"github.com/gin-gonic/gin"
 	"dev.sum7.eu/genofire/golang-lib/web"
 	"dev.sum7.eu/genofire/golang-lib/web/api/status"
 	"dev.sum7.eu/genofire/golang-lib/web/metrics"
+	"github.com/gin-gonic/gin"
 )
 
 // Bind to webservice
@@ -18,13 +18,13 @@ import (
 // @securityDefinitions.apikey ApiKeyAuth
 // @in header
 // @name Authorization
-func Bind(xmpp *XMPPService) web.ModuleRegisterFunc {
+func Bind(xmpp *XMPPService, jwt JWTSecret) web.ModuleRegisterFunc {
 	return func(r *gin.Engine, ws *web.Service) {
 		// docs.Bind(r, ws)
 
 		status.Register(r, ws)
 		metrics.Register(r, ws)
 		Get(r, ws)
-		Post(r, ws, xmpp)
+		Post(r, ws, xmpp, jwt)
 	}
 }

gateway/web_post.go

@@ -2,16 +2,22 @@ package main
 
 import (
 	"github.com/gin-gonic/gin"
-	"net/http"
 	"io/ioutil"
+	"net/http"
 
 	"dev.sum7.eu/genofire/golang-lib/web"
 )
 
-func Post(r *gin.Engine, ws *web.Service, xmpp *XMPPService) {
+func Post(r *gin.Engine, ws *web.Service, xmpp *XMPPService, jwtsecret JWTSecret) {
 	r.POST("/UP", func(c *gin.Context) {
-		to := c.Query("to")
+		to, token, err := jwtsecret.Read(c.Query("token"))
-		token := c.Query("token")
+		if err != nil {
+			c.JSON(http.StatusUnauthorized, web.HTTPError{
+				Message: "jwt token unauthoried - or not given",
+				Error:   err.Error(),
+			})
+			return
+		}
 		b, err := ioutil.ReadAll(c.Request.Body)
 		if err != nil {
 			c.JSON(http.StatusBadRequest, web.HTTPError{

gateway/xmpp.go

@@ -23,6 +23,7 @@ type XMPPService struct {
 	Secret string `toml:"secret"`
 	// hidden here for beautiful config file
 	EndpointURL string    `toml:"-"`
+	JWTSecret   JWTSecret `toml"-"`
 	session     *xmpp.Session
 }
 
@@ -102,7 +103,13 @@ func (s *XMPPService) handleRegister(iq stanza.IQ, t xmlstream.TokenReadEncoder,
 		reply.Register.Error = &messages.ErrorData{Body: "no token"}
 		return nil
 	}
-	endpoint := s.EndpointURL+"/UP?token=" + token + "&to=" + iq.From.String()
+	jwt, err := s.JWTSecret.Generate(iq.From, token)
+	if err != nil {
+		log.Errorf("unable jwt generation: %v", err)
+		reply.Register.Error = &messages.ErrorData{Body: "jwt error on gateway"}
+		return nil
+	}
+	endpoint := s.EndpointURL + "/UP?token=" + jwt
 	reply.IQ.Type = stanza.ResultIQ
 	reply.Register.Endpoint = &messages.EndpointData{Body: endpoint}
 	log.Infof("generate respone: %v", endpoint)
@@ -145,14 +152,14 @@ func (s *XMPPService) handleDisco(iq stanza.IQ, t xmlstream.TokenReadEncoder, st
 }
 
 // SendMessage of an UP Notification
-func (s *XMPPService) SendMessage(to, token, content string) error {
+func (s *XMPPService) SendMessage(to jid.JID, token, content string) error {
 	log.WithFields(map[string]interface{}{
 		"to":    to,
 		"token": token,
 	}).Info("forward message to xmpp")
 	return s.session.Encode(context.TODO(), messages.Message{
 		Message: stanza.Message{
-			To:   jid.MustParse(to),
+			To:   to,
 			From: jid.MustParse(s.JID),
 			// Type: stanza.ChatMessage,
 			Type: stanza.NormalMessage,