LDAP authentification backend

auth/auth.go

@@ -1,11 +1,33 @@
 package auth
 
 import (
+	"errors"
+
 	"gitlab.crans.org/nounous/ghostream/auth/ldap"
 )
 
-// Options holds web package configuration
+// Options holds package configuration
 type Options struct {
 	Backend string
 	LDAP    ldap.Options
 }
+
+// Backend to log user in
+type Backend interface {
+	Login(string, string) (bool, error)
+}
+
+// New initialize authentification backend
+func New(cfg *Options) (Backend, error) {
+	var backend Backend
+
+	if cfg.Backend == "LDAP" {
+		backend = ldap.LDAP{Cfg: cfg.LDAP}
+	} else {
+		// Package is misconfigured
+		return nil, errors.New("Authentification backend not found")
+	}
+
+	// Init and return backend
+	return backend, nil
+}

auth/ldap/ldap.go

@@ -1,7 +1,36 @@
 package ldap
 
-// Options holds web package configuration
+import (
+	"github.com/go-ldap/ldap/v3"
+)
+
+// Options holds package configuration
 type Options struct {
 	URI    string
 	UserDn string
 }
+
+// LDAP authentification backend
+type LDAP struct {
+	Cfg Options
+}
+
+// Login tries to bind to LDAP
+// Returns (true, nil) if success
+func (a LDAP) Login(username string, password string) (bool, error) {
+	// Connect to LDAP server
+	l, err := ldap.DialURL(a.Cfg.URI)
+	if err != nil {
+		return false, err
+	}
+	defer l.Close()
+
+	// Try to bind as user
+	err = l.Bind("cn=username,dc=example,dc=com", password)
+	if err != nil {
+		return false, err
+	}
+
+	// Login succeeded
+	return true, nil
+}