Merge pull request #4 from bwInfoSec/add-notification

Add notification banner

README.md

@@ -8,6 +8,14 @@ This is a minimal go ldap frontend for users to change their password.
 
 **This frontend is intended to run behind a reverse proxy and has no native TLS/SSL support!**
 
+## Getting Started
+
+```sh
+go build
+
+./goldap
+```
+
 
 ## Licence
 

goldap.ini

@@ -18,3 +18,7 @@ url: http://the.url.of.your.portal.site:6969
 listen_address: 0.0.0.0:6969
 # Page title
 page_title_prefix: "LDAP Portal"
+
+[content]
+# Information box
+information: Aktuell wird keine Passwortzurücksetzung unterstützt. Wenn Sie Ihr Passwort vergessen oder verloren haben, wenden Sie sich bitte an unseren Support unter <a href="mailto:kernteam@urz.uni-heidelberg.de">kernteam@urz.uni-heidelberg.de</a>.

html/templates/login_form.html

@@ -33,5 +33,12 @@ <h3 class="my-3">Bitte melden Sie sich an, um Ihr Passwort zu ändern</h3>
             </div>
         </div>
     </div>
+    {{ if .information }}
+    <div class="container py-5 h-100">
+        <div class="alert alert-warning text-center" role="alert">
+            {{ .information }}
+        </div>
+    </div>
+    {{ end }}
 </body>
 </html>

parseini.go

@@ -2,10 +2,11 @@ package main
 
 import (
 	"fmt"
+	"os"
+
 	"github.com/go-playground/validator/v10"
 	"github.com/rs/zerolog/log"
 	"gopkg.in/ini.v1"
-	"os"
 )
 
 // Configuration struct for general app configuration values
@@ -16,7 +17,8 @@ type Config struct {
 		ListenAddress   string `validate:"required,tcp_addr"`
 		PageTitlePrefix string `validate:"required"`
 	}
-	LDAP struct {
+	Information string
+	LDAP        struct {
 		Server struct {
 			Host          string `validate:"required,hostname"`
 			Port          uint   `validate:"required,gt=0,lte=65535"`
@@ -65,6 +67,11 @@ func ReadINI(configPath string, configPointer *Config) error {
 		log.Error().Err(err).Msg("ReadINI")
 		return err
 	}
+	err = readContent(cfg, configPointer)
+	if err != nil {
+		log.Error().Err(err).Msg("ReadINI")
+		return err
+	}
 
 	validate := validator.New()
 
@@ -94,6 +101,15 @@ func readWebserver(cfg *ini.File, configPointer *Config) error {
 	configPointer.Webserver.URL = cfg.Section("webserver").Key("url").String()
 	configPointer.Webserver.ListenAddress = cfg.Section("webserver").Key("listen_address").String()
 	configPointer.Webserver.PageTitlePrefix = cfg.Section("webserver").Key("page_title_prefix").String()
+	configPointer.Information = cfg.Section("content").Key("information").String()
+
+	return err
+}
+
+func readContent(cfg *ini.File, configPointer *Config) error {
+	err := error(nil)
+
+	configPointer.Information = cfg.Section("content").Key("information").String()
 
 	return err
 }

webserver.go

@@ -3,6 +3,7 @@ package main
 import (
 	_ "embed"
 	"fmt"
+	"html/template"
 	"net/http"
 
 	"github.com/go-ldap/ldap"
@@ -48,10 +49,11 @@ func serveFavicon(w http.ResponseWriter, r *http.Request) {
 func loginHandler(w http.ResponseWriter, r *http.Request) {
 
 	// create context for template
-	ctx := make(map[string]string)
+	ctx := make(map[string]any)
 	ctx["token"] = nosurf.Token(r)
 	ctx["send_to"] = "/login"
 	ctx["title_prefix"] = CConfig.Webserver.PageTitlePrefix
+	ctx["information"] = template.HTML(CConfig.Information)
 
 	if r.Method == "POST" {
 		if err := r.ParseForm(); err != nil {