add: api key middleware

internal/controllers/membershipController.go

@@ -1,7 +1,6 @@
 package controllers
 
 import (
-	"GoMembership/internal/config"
 	"GoMembership/internal/models"
 	"GoMembership/internal/services"
 
@@ -28,19 +27,6 @@ func (mc *MembershipController) RegisterSubscription(c *gin.Context) {
 		c.JSON(http.StatusBadRequest, gin.H{"error": "Couldn't decode subscription data"})
 	}
 
-	logger.Info.Printf("Using API key: %v", config.Auth.APIKEY)
-	if regData.APIKey == "" {
-		logger.Error.Println("API Key is missing")
-		c.JSON(http.StatusUnauthorized, "API Key is missing")
-		return
-	}
-
-	if regData.APIKey != config.Auth.APIKEY {
-		logger.Error.Printf("API Key not valid: %v", regData.APIKey)
-		c.JSON(http.StatusUnauthorized, "API Key is missing")
-		return
-	}
-
 	// Register Subscription
 	id, err := mc.Service.RegisterSubscription(&regData.Model)
 	if err != nil {

internal/middlewares/api.go

@@ -0,0 +1,31 @@
+package middlewares
+
+import (
+	"crypto/subtle"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+
+	"GoMembership/internal/config"
+)
+
+func APIKeyMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		clientAPIKey := c.GetHeader("X-API-Key")
+
+		if clientAPIKey == "" {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "API key is missing"})
+			c.Abort()
+			return
+		}
+
+		// Using subtle.ConstantTimeCompare to mitigate timing attacks
+		if subtle.ConstantTimeCompare([]byte(clientAPIKey), []byte(config.Auth.APIKEY)) != 1 {
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid API key"})
+			c.Abort()
+			return
+		}
+
+		c.Next()
+	}
+}

internal/middlewares/api_test.go

@@ -0,0 +1,61 @@
+package middlewares
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/stretchr/testify/assert"
+
+	"GoMembership/internal/config"
+)
+
+func TestAPIKeyMiddleware(t *testing.T) {
+	// Set up a test API key
+	testAPIKey := "test-api-key-12345"
+	config.Auth.APIKEY = testAPIKey
+
+	// Set Gin to Test Mode
+	gin.SetMode(gin.TestMode)
+
+	// Tests table
+	tests := []struct {
+		name       string
+		apiKey     string
+		wantStatus int
+	}{
+		{"Valid API Key", testAPIKey, http.StatusOK},
+		{"Missing API Key", "", http.StatusUnauthorized},
+		{"Invalid API Key", "wrong-key", http.StatusUnauthorized},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			// Set up a new test router and handler
+			router := gin.New()
+			router.Use(APIKeyMiddleware())
+			router.GET("/test", func(c *gin.Context) {
+				c.Status(http.StatusOK)
+			})
+
+			// Create a test request
+			w := httptest.NewRecorder()
+			req, _ := http.NewRequest("GET", "/test", nil)
+			if tt.apiKey != "" {
+				req.Header.Set("X-API-Key", tt.apiKey)
+			}
+
+			// Serve the request
+			router.ServeHTTP(w, req)
+
+			// Assert the response
+			assert.Equal(t, tt.wantStatus, w.Code)
+
+			// Additional assertions for specific cases
+			if tt.wantStatus == http.StatusUnauthorized {
+				assert.Contains(t, w.Body.String(), "API key")
+			}
+		})
+	}
+}

internal/routes/routes.go

@@ -8,11 +8,20 @@ import (
 )
 
 func RegisterRoutes(router *gin.Engine, userController *controllers.UserController, membershipcontroller *controllers.MembershipController, contactController *controllers.ContactController) {
-	router.GET("/backend/verify", userController.VerifyMailHandler)
-	router.POST("/backend/api/register", userController.RegisterUser)
-	router.POST("/backend/api/register/subscription", membershipcontroller.RegisterSubscription)
-	router.POST("/backend/api/contact", contactController.RelayContactRequest)
-	// router.HandleFunc("/login", userController.LoginUser).Methods("POST")
+	router.GET("/verify", userController.VerifyMailHandler)
+	router.POST("/h/register", userController.RegisterUser)
+	router.POST("/h/contact", contactController.RelayContactRequest)
 
 	router.POST("/csp-report", middlewares.CSPReportHandling)
+
+	// create subrouter for teh authenticated area /account
+	// also pthprefix matches everything below /account
+	// accountRouter := router.PathPrefix("/account").Subrouter()
+	// accountRouter.Use(middlewares.AuthMiddleware)
+	//create api key required router
+	apiRouter := router.Group("/api")
+	{
+		router.POST("/subscription", membershipcontroller.RegisterSubscription)
+	}
+	apiRouter.Use(middlewares.APIKeyMiddleware())
 }

internal/server/server.go

@@ -61,10 +61,6 @@ func Run() {
 	router.Use(middlewares.RateLimitMiddleware(limiter))
 
 	routes.RegisterRoutes(router, userController, membershipController, contactController)
-	// create subrouter for teh authenticated area /account
-	// also pthprefix matches everything below /account
-	// accountRouter := router.PathPrefix("/account").Subrouter()
-	// accountRouter.Use(middlewares.AuthMiddleware)
 
 	logger.Info.Println("Starting server on :8080")
 	srv = &http.Server{

pkg/errors/errors.go

@@ -12,4 +12,7 @@ var (
 	ErrTokenNotSet             = errors.New("verification token has not been set")
 	ErrNoData                  = errors.New("no data provided")
 	ErrNoRowsAffected          = errors.New("no rows affected")
+	ErrValueTooLong            = errors.New("cookie value too long")
+	ErrInvalidValue            = errors.New("invalid cookie value")
+	ErrInvalidSigningAlgorithm = errors.New("invalid signing algorithm")
 )

templates/email/mail_verification.tmpl

@@ -8,7 +8,7 @@ noch Ihre Emailadresse indem Sie hier klicken:
 
 E-Mail Adresse bestätigen
 
-    {{.BASEURL}}/backend/verify?token={{.Token}}
+    {{.BASEURL}}/verify?token={{.Token}}
 
 Nachdem wir Ihre E-Mail Adresse bestätigen konnten, schicken wir
 Ihnen alle weiteren Informationen zu. Wir freuen uns auf die
@@ -94,7 +94,7 @@ Der Vorstand
               </div>
               <div style="text-align: center; padding: 16px 24px 16px 24px">
                 <a
-                  href="{{.BASEURL}}/backend/verify?token={{.Token}}"
+                  href="{{.BASEURL}}/verify?token={{.Token}}"
                   style="
                     color: #ffffff;
                     font-size: 26px;
@@ -146,7 +146,7 @@ Der Vorstand
                   padding: 4px 24px 16px 24px;
                 "
               >
-                {{.BASEURL}}/backend/verify?token={{.Token}}
+                {{.BASEURL}}/verify?token={{.Token}}
               </div>
               <div style="font-weight: normal; padding: 16px 24px 16px 24px">
                 Nachdem wir Ihre E-Mail Adresse bestätigen konnten, schicken wir