Add nested group admin state resolution

internal/ldap/config.go

@@ -27,6 +27,7 @@ type Config struct {
 
 	LoginFilter     string    `yaml:"loginFilter" envconfig:"LDAP_LOGIN_FILTER"` // {{login_identifier}} gets replaced with the login email address
 	SyncFilter      string    `yaml:"syncFilter" envconfig:"LDAP_SYNC_FILTER"`
+	SyncGroupFilter string    `yaml:"syncGroupFilter" envconfig:"LDAP_SYNC_GROUP_FILTER"`
 	AdminLdapGroup  string    `yaml:"adminGroup" envconfig:"LDAP_ADMIN_GROUP"` // Members of this group receive admin rights in WG-Portal
 	AdminLdapGroup_ *gldap.DN `yaml:"-"`
 	EveryoneAdmin   bool      `yaml:"everyoneAdmin" envconfig:"LDAP_EVERYONE_ADMIN"`

internal/ldap/ldap.go

@@ -8,6 +8,13 @@ import (
 	"github.com/pkg/errors"
 )
 
+type ObjectType int64
+
+const (
+	Users  ObjectType = 1
+	Groups ObjectType = 2
+)
+
 type RawLdapData struct {
 	DN            string
 	Attributes    map[string]string
@@ -69,21 +76,34 @@ func Close(conn *ldap.Conn) {
 	}
 }
 
-func FindAllUsers(cfg *Config) ([]RawLdapData, error) {
+func FindAllObjects(cfg *Config, objType ObjectType) ([]RawLdapData, error) {
 	client, err := Open(cfg)
 	if err != nil {
 		return nil, errors.WithMessage(err, "failed to open ldap connection")
 	}
 	defer Close(client)
 
-	// Search all users
-	attrs := []string{"dn", cfg.EmailAttribute, cfg.EmailAttribute, cfg.FirstNameAttribute, cfg.LastNameAttribute,
-		cfg.PhoneAttribute, cfg.GroupMemberAttribute}
-	searchRequest := ldap.NewSearchRequest(
-		cfg.BaseDN,
-		ldap.ScopeWholeSubtree, ldap.NeverDerefAliases, 0, 0, false,
-		cfg.SyncFilter, attrs, nil,
-	)
+	var searchRequest *ldap.SearchRequest
+	var attrs []string
+
+	if objType == Users {
+		// Search all users
+		attrs = []string{"dn", cfg.EmailAttribute, cfg.EmailAttribute, cfg.FirstNameAttribute, cfg.LastNameAttribute,
+			cfg.PhoneAttribute, cfg.GroupMemberAttribute}
+		searchRequest = ldap.NewSearchRequest(
+			cfg.BaseDN,
+			ldap.ScopeWholeSubtree, ldap.NeverDerefAliases, 0, 0, false,
+			cfg.SyncFilter, attrs, nil,
+		)
+	} else if objType == Groups {
+		// Search all groups
+		attrs = []string{"dn", cfg.GroupMemberAttribute}
+		searchRequest = ldap.NewSearchRequest(
+			cfg.BaseDN,
+			ldap.ScopeWholeSubtree, ldap.NeverDerefAliases, 0, 0, false,
+			cfg.SyncGroupFilter, attrs, nil,
+		)
+	}
 
 	sr, err := client.Search(searchRequest)
 	if err != nil {

internal/server/configuration.go

@@ -114,6 +114,7 @@ func NewConfig() *Config {
 	cfg.LDAP.AdminLdapGroup = "CN=WireGuardAdmins,OU=_O_IT,DC=COMPANY,DC=LOCAL"
 	cfg.LDAP.LoginFilter = "(&(objectClass=organizationalPerson)(mail={{login_identifier}})(!userAccountControl:1.2.840.113556.1.4.803:=2))"
 	cfg.LDAP.SyncFilter = "(&(objectClass=organizationalPerson)(!userAccountControl:1.2.840.113556.1.4.803:=2)(mail=*))"
+	cfg.LDAP.SyncGroupFilter = "(&(objectCategory=group))"
 
 	cfg.WG.DeviceNames = []string{"wg0"}
 	cfg.WG.DefaultDeviceName = "wg0"

internal/server/ldapsync.go

@@ -16,8 +16,25 @@ import (
 
 func (s *Server) SyncLdapWithUserDatabase() {
 	logrus.Info("starting ldap user synchronization...")
+
 	running := true
 	for running {
+		// Main work here
+		logrus.Trace("syncing ldap users to database...")
+		ldapUsers, err := ldap.FindAllObjects(&s.config.LDAP, ldap.Users)
+		ldapGroups, errGroups := ldap.FindAllObjects(&s.config.LDAP, ldap.Groups)
+		if err != nil && errGroups != nil {
+			logrus.Errorf("failed to fetch users from ldap: %v", err)
+			continue
+		}
+		logrus.Tracef("found %d users in ldap", len(ldapUsers))
+
+		// Update existing LDAP users
+		s.updateLdapUsers(ldapUsers, ldapGroups)
+
+		// Disable missing LDAP users
+		s.disableMissingLdapUsers(ldapUsers)
+
 		// Select blocks until one of the cases happens
 		select {
 		case <-time.After(1 * time.Minute):
@@ -27,26 +44,11 @@ func (s *Server) SyncLdapWithUserDatabase() {
 			running = false
 			continue
 		}
-
-		// Main work here
-		logrus.Trace("syncing ldap users to database...")
-		ldapUsers, err := ldap.FindAllUsers(&s.config.LDAP)
-		if err != nil {
-			logrus.Errorf("failed to fetch users from ldap: %v", err)
-			continue
-		}
-		logrus.Tracef("found %d users in ldap", len(ldapUsers))
-
-		// Update existing LDAP users
-		s.updateLdapUsers(ldapUsers)
-
-		// Disable missing LDAP users
-		s.disableMissingLdapUsers(ldapUsers)
 	}
 	logrus.Info("ldap user synchronization stopped")
 }
 
-func (s Server) userIsInAdminGroup(ldapData *ldap.RawLdapData) bool {
+func (s Server) userIsInAdminGroup(ldapData *ldap.RawLdapData, ldapGroupData []ldap.RawLdapData) bool {
 	if s.config.LDAP.EveryoneAdmin {
 		return true
 	}
@@ -58,11 +60,16 @@ func (s Server) userIsInAdminGroup(ldapData *ldap.RawLdapData) bool {
 		if s.config.LDAP.AdminLdapGroup_.Equal(dn) {
 			return true
 		}
+		for _, group2 := range ldapGroupData {
+			if group2.DN == string(group) {
+				return s.userIsInAdminGroup(&group2, ldapGroupData)
+			}
+		}
 	}
 	return false
 }
 
-func (s Server) userChangedInLdap(user *users.User, ldapData *ldap.RawLdapData) bool {
+func (s Server) userChangedInLdap(user *users.User, ldapData *ldap.RawLdapData, ldapGroupData []ldap.RawLdapData) bool {
 	if user.Firstname != ldapData.Attributes[s.config.LDAP.FirstNameAttribute] {
 		return true
 	}
@@ -83,7 +90,7 @@ func (s Server) userChangedInLdap(user *users.User, ldapData *ldap.RawLdapData)
 		return true
 	}
 
-	if user.IsAdmin != s.userIsInAdminGroup(ldapData) {
+	if user.IsAdmin != s.userIsInAdminGroup(ldapData, ldapGroupData) {
 		return true
 	}
 
@@ -126,7 +133,7 @@ func (s *Server) disableMissingLdapUsers(ldapUsers []ldap.RawLdapData) {
 	}
 }
 
-func (s *Server) updateLdapUsers(ldapUsers []ldap.RawLdapData) {
+func (s *Server) updateLdapUsers(ldapUsers []ldap.RawLdapData, ldapGroups []ldap.RawLdapData) {
 	for i := range ldapUsers {
 		if ldapUsers[i].Attributes[s.config.LDAP.EmailAttribute] == "" {
 			logrus.Tracef("skipping sync of %s, empty email attribute", ldapUsers[i].DN)
@@ -152,13 +159,13 @@ func (s *Server) updateLdapUsers(ldapUsers []ldap.RawLdapData) {
 		}
 
 		// Sync attributes from ldap
-		if s.userChangedInLdap(user, &ldapUsers[i]) {
+		if s.userChangedInLdap(user, &ldapUsers[i], ldapGroups) {
 			logrus.Debugf("updating ldap user %s", user.Email)
 			user.Firstname = ldapUsers[i].Attributes[s.config.LDAP.FirstNameAttribute]
 			user.Lastname = ldapUsers[i].Attributes[s.config.LDAP.LastNameAttribute]
 			user.Email = ldapUsers[i].Attributes[s.config.LDAP.EmailAttribute]
 			user.Phone = ldapUsers[i].Attributes[s.config.LDAP.PhoneAttribute]
-			user.IsAdmin = s.userIsInAdminGroup(&ldapUsers[i])
+			user.IsAdmin = s.userIsInAdminGroup(&ldapUsers[i], ldapGroups)
 			user.Source = users.UserSourceLdap
 			user.DeletedAt = gorm.DeletedAt{} // Not deleted