220 lines
7.4 KiB
Go
220 lines
7.4 KiB
Go
package direct
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import (
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"errors"
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"fmt"
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"strings"
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"sync"
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log "github.com/sirupsen/logrus"
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"github.com/getsentry/sentry-go"
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"github.com/nmcclain/ldap"
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"github.com/prometheus/client_golang/prometheus"
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"goauthentik.io/api"
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"goauthentik.io/internal/outpost/ldap/constants"
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"goauthentik.io/internal/outpost/ldap/flags"
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"goauthentik.io/internal/outpost/ldap/group"
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"goauthentik.io/internal/outpost/ldap/metrics"
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"goauthentik.io/internal/outpost/ldap/search"
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"goauthentik.io/internal/outpost/ldap/server"
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"goauthentik.io/internal/outpost/ldap/utils"
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)
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type DirectSearcher struct {
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si server.LDAPServerInstance
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log *log.Entry
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}
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func NewDirectSearcher(si server.LDAPServerInstance) *DirectSearcher {
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ds := &DirectSearcher{
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si: si,
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log: log.WithField("logger", "authentik.outpost.ldap.searcher.direct"),
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}
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ds.log.Info("initialised direct searcher")
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return ds
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}
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func (ds *DirectSearcher) SearchMe(req *search.Request, f flags.UserFlags) (ldap.ServerSearchResult, error) {
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if f.UserInfo == nil {
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u, _, err := ds.si.GetAPIClient().CoreApi.CoreUsersRetrieve(req.Context(), f.UserPk).Execute()
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if err != nil {
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req.Log().WithError(err).Warning("Failed to get user info")
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return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultOperationsError}, fmt.Errorf("failed to get userinfo")
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}
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f.UserInfo = &u
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}
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entries := make([]*ldap.Entry, 1)
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entries[0] = ds.si.UserEntry(*f.UserInfo)
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return ldap.ServerSearchResult{Entries: entries, Referrals: []string{}, Controls: []ldap.Control{}, ResultCode: ldap.LDAPResultSuccess}, nil
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}
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func (ds *DirectSearcher) Search(req *search.Request) (ldap.ServerSearchResult, error) {
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accsp := sentry.StartSpan(req.Context(), "authentik.providers.ldap.search.check_access")
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baseDN := strings.ToLower("," + ds.si.GetBaseDN())
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entries := []*ldap.Entry{}
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filterEntity, err := ldap.GetFilterObjectClass(req.Filter)
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if err != nil {
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metrics.RequestsRejected.With(prometheus.Labels{
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"outpost_name": ds.si.GetOutpostName(),
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"type": "search",
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"reason": "filter_parse_fail",
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"dn": req.BindDN,
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"client": req.RemoteAddr(),
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}).Inc()
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return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultOperationsError}, fmt.Errorf("Search Error: error parsing filter: %s", req.Filter)
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}
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if len(req.BindDN) < 1 {
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metrics.RequestsRejected.With(prometheus.Labels{
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"outpost_name": ds.si.GetOutpostName(),
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"type": "search",
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"reason": "empty_bind_dn",
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"dn": req.BindDN,
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"client": req.RemoteAddr(),
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}).Inc()
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return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultInsufficientAccessRights}, fmt.Errorf("Search Error: Anonymous BindDN not allowed %s", req.BindDN)
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}
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if !strings.HasSuffix(req.BindDN, baseDN) {
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metrics.RequestsRejected.With(prometheus.Labels{
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"outpost_name": ds.si.GetOutpostName(),
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"type": "search",
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"reason": "invalid_bind_dn",
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"dn": req.BindDN,
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"client": req.RemoteAddr(),
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}).Inc()
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return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultInsufficientAccessRights}, fmt.Errorf("Search Error: BindDN %s not in our BaseDN %s", req.BindDN, ds.si.GetBaseDN())
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}
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flags, ok := ds.si.GetFlags(req.BindDN)
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if !ok {
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req.Log().Debug("User info not cached")
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metrics.RequestsRejected.With(prometheus.Labels{
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"outpost_name": ds.si.GetOutpostName(),
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"type": "search",
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"reason": "user_info_not_cached",
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"dn": req.BindDN,
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"client": req.RemoteAddr(),
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}).Inc()
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return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultInsufficientAccessRights}, errors.New("access denied")
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}
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if req.Scope == ldap.ScopeBaseObject {
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req.Log().Debug("base scope, showing domain info")
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return ds.SearchBase(req, flags.CanSearch)
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}
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if !flags.CanSearch {
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req.Log().Debug("User can't search, showing info about user")
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return ds.SearchMe(req, flags)
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}
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accsp.Finish()
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parsedFilter, err := ldap.CompileFilter(req.Filter)
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if err != nil {
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metrics.RequestsRejected.With(prometheus.Labels{
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"outpost_name": ds.si.GetOutpostName(),
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"type": "search",
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"reason": "filter_parse_fail",
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"dn": req.BindDN,
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"client": req.RemoteAddr(),
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}).Inc()
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return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultOperationsError}, fmt.Errorf("Search Error: error parsing filter: %s", req.Filter)
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}
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// Create a custom client to set additional headers
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c := api.NewAPIClient(ds.si.GetAPIClient().GetConfig())
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c.GetConfig().AddDefaultHeader("X-authentik-outpost-ldap-query", req.Filter)
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switch filterEntity {
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default:
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metrics.RequestsRejected.With(prometheus.Labels{
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"outpost_name": ds.si.GetOutpostName(),
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"type": "search",
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"reason": "unhandled_filter_type",
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"dn": req.BindDN,
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"client": req.RemoteAddr(),
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}).Inc()
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return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultOperationsError}, fmt.Errorf("Search Error: unhandled filter type: %s [%s]", filterEntity, req.Filter)
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case constants.OCGroupOfUniqueNames:
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fallthrough
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case constants.OCAKGroup:
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fallthrough
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case constants.OCAKVirtualGroup:
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fallthrough
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case constants.OCGroup:
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wg := sync.WaitGroup{}
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wg.Add(2)
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gEntries := make([]*ldap.Entry, 0)
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uEntries := make([]*ldap.Entry, 0)
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go func() {
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defer wg.Done()
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gapisp := sentry.StartSpan(req.Context(), "authentik.providers.ldap.search.api_group")
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searchReq, skip := utils.ParseFilterForGroup(c.CoreApi.CoreGroupsList(gapisp.Context()), parsedFilter, false)
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if skip {
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req.Log().Trace("Skip backend request")
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return
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}
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groups, _, err := searchReq.Execute()
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gapisp.Finish()
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if err != nil {
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req.Log().WithError(err).Warning("failed to get groups")
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return
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}
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req.Log().WithField("count", len(groups.Results)).Trace("Got results from API")
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for _, g := range groups.Results {
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gEntries = append(gEntries, group.FromAPIGroup(g, ds.si).Entry())
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}
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}()
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go func() {
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defer wg.Done()
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uapisp := sentry.StartSpan(req.Context(), "authentik.providers.ldap.search.api_user")
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searchReq, skip := utils.ParseFilterForUser(c.CoreApi.CoreUsersList(uapisp.Context()), parsedFilter, false)
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if skip {
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req.Log().Trace("Skip backend request")
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return
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}
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users, _, err := searchReq.Execute()
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uapisp.Finish()
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if err != nil {
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req.Log().WithError(err).Warning("failed to get users")
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return
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}
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for _, u := range users.Results {
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uEntries = append(uEntries, group.FromAPIUser(u, ds.si).Entry())
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}
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}()
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wg.Wait()
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entries = append(gEntries, uEntries...)
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case "":
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fallthrough
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case constants.OCOrgPerson:
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fallthrough
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case constants.OCInetOrgPerson:
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fallthrough
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case constants.OCAKUser:
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fallthrough
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case constants.OCUser:
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uapisp := sentry.StartSpan(req.Context(), "authentik.providers.ldap.search.api_user")
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searchReq, skip := utils.ParseFilterForUser(c.CoreApi.CoreUsersList(uapisp.Context()), parsedFilter, false)
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if skip {
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req.Log().Trace("Skip backend request")
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return ldap.ServerSearchResult{Entries: entries, Referrals: []string{}, Controls: []ldap.Control{}, ResultCode: ldap.LDAPResultSuccess}, nil
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}
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users, _, err := searchReq.Execute()
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uapisp.Finish()
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if err != nil {
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return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultOperationsError}, fmt.Errorf("API Error: %s", err)
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}
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for _, u := range users.Results {
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entries = append(entries, ds.si.UserEntry(u))
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}
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}
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return ldap.ServerSearchResult{Entries: entries, Referrals: []string{}, Controls: []ldap.Control{}, ResultCode: ldap.LDAPResultSuccess}, nil
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}
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