package ldap import ( "errors" "fmt" "strings" "sync" "github.com/getsentry/sentry-go" "github.com/nmcclain/ldap" "github.com/prometheus/client_golang/prometheus" "goauthentik.io/api" "goauthentik.io/internal/outpost/ldap/metrics" "goauthentik.io/internal/utils" ) func (pi *ProviderInstance) SearchMe(req SearchRequest, f UserFlags) (ldap.ServerSearchResult, error) { if f.UserInfo == nil { u, _, err := pi.s.ac.Client.CoreApi.CoreUsersRetrieve(req.ctx, f.UserPk).Execute() if err != nil { req.log.WithError(err).Warning("Failed to get user info") return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultOperationsError}, fmt.Errorf("failed to get userinfo") } f.UserInfo = &u } entries := make([]*ldap.Entry, 1) entries[0] = pi.UserEntry(*f.UserInfo) return ldap.ServerSearchResult{Entries: entries, Referrals: []string{}, Controls: []ldap.Control{}, ResultCode: ldap.LDAPResultSuccess}, nil } func (pi *ProviderInstance) Search(req SearchRequest) (ldap.ServerSearchResult, error) { accsp := sentry.StartSpan(req.ctx, "authentik.providers.ldap.search.check_access") baseDN := strings.ToLower("," + pi.BaseDN) entries := []*ldap.Entry{} filterEntity, err := ldap.GetFilterObjectClass(req.Filter) if err != nil { metrics.RequestsRejected.With(prometheus.Labels{ "type": "search", "reason": "filter_parse_fail", "dn": req.BindDN, "client": utils.GetIP(req.conn.RemoteAddr()), }).Inc() return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultOperationsError}, fmt.Errorf("Search Error: error parsing filter: %s", req.Filter) } if len(req.BindDN) < 1 { metrics.RequestsRejected.With(prometheus.Labels{ "type": "search", "reason": "empty_bind_dn", "dn": req.BindDN, "client": utils.GetIP(req.conn.RemoteAddr()), }).Inc() return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultInsufficientAccessRights}, fmt.Errorf("Search Error: Anonymous BindDN not allowed %s", req.BindDN) } if !strings.HasSuffix(req.BindDN, baseDN) { metrics.RequestsRejected.With(prometheus.Labels{ "type": "search", "reason": "invalid_bind_dn", "dn": req.BindDN, "client": utils.GetIP(req.conn.RemoteAddr()), }).Inc() return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultInsufficientAccessRights}, fmt.Errorf("Search Error: BindDN %s not in our BaseDN %s", req.BindDN, pi.BaseDN) } pi.boundUsersMutex.RLock() flags, ok := pi.boundUsers[req.BindDN] pi.boundUsersMutex.RUnlock() if !ok { pi.log.Debug("User info not cached") metrics.RequestsRejected.With(prometheus.Labels{ "type": "search", "reason": "user_info_not_cached", "dn": req.BindDN, "client": utils.GetIP(req.conn.RemoteAddr()), }).Inc() return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultInsufficientAccessRights}, errors.New("access denied") } if !flags.CanSearch { pi.log.Debug("User can't search, showing info about user") return pi.SearchMe(req, flags) } accsp.Finish() parsedFilter, err := ldap.CompileFilter(req.Filter) if err != nil { metrics.RequestsRejected.With(prometheus.Labels{ "type": "search", "reason": "filter_parse_fail", "dn": req.BindDN, "client": utils.GetIP(req.conn.RemoteAddr()), }).Inc() return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultOperationsError}, fmt.Errorf("Search Error: error parsing filter: %s", req.Filter) } // Create a custom client to set additional headers c := api.NewAPIClient(pi.s.ac.Client.GetConfig()) c.GetConfig().AddDefaultHeader("X-authentik-outpost-ldap-query", req.Filter) switch filterEntity { default: metrics.RequestsRejected.With(prometheus.Labels{ "type": "search", "reason": "unhandled_filter_type", "dn": req.BindDN, "client": utils.GetIP(req.conn.RemoteAddr()), }).Inc() return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultOperationsError}, fmt.Errorf("Search Error: unhandled filter type: %s [%s]", filterEntity, req.Filter) case GroupObjectClass: wg := sync.WaitGroup{} wg.Add(2) gEntries := make([]*ldap.Entry, 0) uEntries := make([]*ldap.Entry, 0) go func() { defer wg.Done() gapisp := sentry.StartSpan(req.ctx, "authentik.providers.ldap.search.api_group") searchReq, skip := parseFilterForGroup(c.CoreApi.CoreGroupsList(gapisp.Context()), parsedFilter, false) if skip { pi.log.Trace("Skip backend request") return } groups, _, err := searchReq.Execute() gapisp.Finish() if err != nil { req.log.WithError(err).Warning("failed to get groups") return } pi.log.WithField("count", len(groups.Results)).Trace("Got results from API") for _, g := range groups.Results { gEntries = append(gEntries, pi.GroupEntry(pi.APIGroupToLDAPGroup(g))) } }() go func() { defer wg.Done() uapisp := sentry.StartSpan(req.ctx, "authentik.providers.ldap.search.api_user") searchReq, skip := parseFilterForUser(c.CoreApi.CoreUsersList(uapisp.Context()), parsedFilter, false) if skip { pi.log.Trace("Skip backend request") return } users, _, err := searchReq.Execute() uapisp.Finish() if err != nil { req.log.WithError(err).Warning("failed to get users") return } for _, u := range users.Results { uEntries = append(uEntries, pi.GroupEntry(pi.APIUserToLDAPGroup(u))) } }() wg.Wait() entries = append(gEntries, uEntries...) case UserObjectClass, "": uapisp := sentry.StartSpan(req.ctx, "authentik.providers.ldap.search.api_user") searchReq, skip := parseFilterForUser(c.CoreApi.CoreUsersList(uapisp.Context()), parsedFilter, false) if skip { pi.log.Trace("Skip backend request") return ldap.ServerSearchResult{Entries: entries, Referrals: []string{}, Controls: []ldap.Control{}, ResultCode: ldap.LDAPResultSuccess}, nil } users, _, err := searchReq.Execute() uapisp.Finish() if err != nil { return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultOperationsError}, fmt.Errorf("API Error: %s", err) } for _, u := range users.Results { entries = append(entries, pi.UserEntry(u)) } } return ldap.ServerSearchResult{Entries: entries, Referrals: []string{}, Controls: []ldap.Control{}, ResultCode: ldap.LDAPResultSuccess}, nil } func (pi *ProviderInstance) UserEntry(u api.User) *ldap.Entry { attrs := []*ldap.EntryAttribute{ { Name: "cn", Values: []string{u.Username}, }, { Name: "sAMAccountName", Values: []string{u.Username}, }, { Name: "uid", Values: []string{u.Uid}, }, { Name: "name", Values: []string{u.Name}, }, { Name: "displayName", Values: []string{u.Name}, }, { Name: "mail", Values: []string{*u.Email}, }, { Name: "objectClass", Values: []string{UserObjectClass, "organizationalPerson", "goauthentik.io/ldap/user"}, }, { Name: "uidNumber", Values: []string{pi.GetUidNumber(u)}, }, { Name: "gidNumber", Values: []string{pi.GetUidNumber(u)}, }, } attrs = append(attrs, &ldap.EntryAttribute{Name: "memberOf", Values: pi.GroupsForUser(u)}) // Old fields for backwards compatibility attrs = append(attrs, &ldap.EntryAttribute{Name: "accountStatus", Values: []string{BoolToString(*u.IsActive)}}) attrs = append(attrs, &ldap.EntryAttribute{Name: "superuser", Values: []string{BoolToString(u.IsSuperuser)}}) attrs = append(attrs, &ldap.EntryAttribute{Name: "goauthentik.io/ldap/active", Values: []string{BoolToString(*u.IsActive)}}) attrs = append(attrs, &ldap.EntryAttribute{Name: "goauthentik.io/ldap/superuser", Values: []string{BoolToString(u.IsSuperuser)}}) attrs = append(attrs, AKAttrsToLDAP(u.Attributes)...) dn := pi.GetUserDN(u.Username) return &ldap.Entry{DN: dn, Attributes: attrs} } func (pi *ProviderInstance) GroupEntry(g LDAPGroup) *ldap.Entry { attrs := []*ldap.EntryAttribute{ { Name: "cn", Values: []string{g.cn}, }, { Name: "uid", Values: []string{g.uid}, }, { Name: "sAMAccountName", Values: []string{g.cn}, }, { Name: "gidNumber", Values: []string{g.gidNumber}, }, } if g.isVirtualGroup { attrs = append(attrs, &ldap.EntryAttribute{ Name: "objectClass", Values: []string{GroupObjectClass, "goauthentik.io/ldap/group", "goauthentik.io/ldap/virtual-group"}, }) } else { attrs = append(attrs, &ldap.EntryAttribute{ Name: "objectClass", Values: []string{GroupObjectClass, "goauthentik.io/ldap/group"}, }) } attrs = append(attrs, &ldap.EntryAttribute{Name: "member", Values: g.member}) attrs = append(attrs, &ldap.EntryAttribute{Name: "goauthentik.io/ldap/superuser", Values: []string{BoolToString(g.isSuperuser)}}) if g.akAttributes != nil { attrs = append(attrs, AKAttrsToLDAP(g.akAttributes)...) } return &ldap.Entry{DN: g.dn, Attributes: attrs} }