fix(ldap): pass through LDAP mail attribute instead of crafting email

internal/controller/user_controller.go

@@ -185,6 +185,9 @@ func (controller *UserController) loginHandler(c *gin.Context) {
 
 	if search.Type == model.UserLDAP {
 		sessionCookie.Provider = "ldap"
+		if search.Email != "" {
+			sessionCookie.Email = search.Email
+		}
 	}
 
 	tlog.App.Trace().Interface("session_cookie", sessionCookie).Msg("Creating session cookie")

internal/middleware/context_middleware.go

@@ -162,7 +162,11 @@ func (m *ContextMiddleware) cookieAuth(ctx context.Context, uuid string) (*model
 
 		userContext.LDAP.Groups = user.Groups
 		userContext.LDAP.Name = utils.Capitalize(userContext.LDAP.Username)
+
 		userContext.LDAP.Email = utils.CompileUserEmail(userContext.LDAP.Username, m.config.CookieDomain)
+		if search.Email != "" {
+			userContext.LDAP.Email = search.Email
+		}
 	case model.ProviderOAuth:
 		_, exists := m.broker.GetService(userContext.OAuth.ID)
 
@@ -240,11 +244,15 @@ func (m *ContextMiddleware) basicAuth(username string, password string) (*model.
 			BaseContext: model.BaseContext{
 				Username: username,
 				Name:     utils.Capitalize(username),
-				Email:    utils.CompileUserEmail(username, m.config.CookieDomain),
 			},
 			Groups: user.Groups,
 		}
 		userContext.Provider = model.ProviderLDAP
+
+		userContext.LDAP.Email = utils.CompileUserEmail(username, m.config.CookieDomain)
+		if search.Email != "" {
+			userContext.LDAP.Email = search.Email
+		}
 	}
 
 	userContext.Authenticated = true

internal/model/users.go

@@ -21,5 +21,6 @@ type LocalUser struct {
 
 type UserSearch struct {
 	Username string
+	Email    string // used for LDAP, we can't throw it to LDAPUser because it would need another cache or an LDAP lookup every time
 	Type     UserSearchType
 }

internal/service/auth_service.go

@@ -129,14 +129,15 @@ func (auth *AuthService) SearchUser(username string) (*model.UserSearch, error)
 	}
 
 	if auth.ldap.IsConfigured() {
-		userDN, err := auth.ldap.GetUserDN(username)
+		userDN, email, err := auth.ldap.GetUserInfo(username)
 
 		if err != nil {
 			return nil, fmt.Errorf("failed to get ldap user: %w", err)
 		}
 
 		return &model.UserSearch{
 			Username: userDN,
+			Email:    email,
 			Type:     model.UserLDAP,
 		}, nil
 	}

internal/service/ldap_service.go

@@ -143,16 +143,15 @@ func (ldap *LdapService) connect() (*ldapgo.Conn, error) {
 	return ldap.conn, nil
 }
 
-func (ldap *LdapService) GetUserDN(username string) (string, error) {
-	// Escape the username to prevent LDAP injection
+func (ldap *LdapService) GetUserInfo(username string) (dn string, email string, err error) {
 	escapedUsername := ldapgo.EscapeFilter(username)
 	filter := fmt.Sprintf(ldap.config.SearchFilter, escapedUsername)
 
 	searchRequest := ldapgo.NewSearchRequest(
 		ldap.config.BaseDN,
 		ldapgo.ScopeWholeSubtree, ldapgo.NeverDerefAliases, 0, 0, false,
 		filter,
-		[]string{"dn"},
+		[]string{"dn", "mail"},
 		nil,
 	)
 
@@ -161,15 +160,15 @@ func (ldap *LdapService) GetUserDN(username string) (string, error) {
 
 	searchResult, err := ldap.conn.Search(searchRequest)
 	if err != nil {
-		return "", err
+		return "", "", err
 	}
 
 	if len(searchResult.Entries) != 1 {
-		return "", fmt.Errorf("multiple or no entries found for user %s", username)
+		return "", "", fmt.Errorf("multiple or no entries found for user %s", username)
 	}
 
-	userDN := searchResult.Entries[0].DN
-	return userDN, nil
+	entry := searchResult.Entries[0]
+	return entry.DN, entry.GetAttributeValue("mail"), nil
 }
 
 func (ldap *LdapService) GetUserGroups(userDN string) ([]string, error) {