257 lines
8.3 KiB
Go
257 lines
8.3 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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log "github.com/sirupsen/logrus"
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"golang.org/x/sync/errgroup"
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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/v3"
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"goauthentik.io/internal/outpost/ldap/constants"
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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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"goauthentik.io/internal/outpost/ldap/utils/paginator"
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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) 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 := ds.si.GetBaseDN()
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filterOC, 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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"app": ds.si.GetAppSlug(),
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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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"app": ds.si.GetAppSlug(),
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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 !utils.HasSuffixNoCase(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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"app": ds.si.GetAppSlug(),
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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 := ds.si.GetFlags(req.BindDN)
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if flags == nil {
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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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"app": ds.si.GetAppSlug(),
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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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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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"app": ds.si.GetAppSlug(),
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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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entries := make([]*ldap.Entry, 0)
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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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scope := req.SearchRequest.Scope
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needUsers, needGroups := ds.si.GetNeededObjects(scope, req.BaseDN, filterOC)
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if scope >= 0 && strings.EqualFold(req.BaseDN, baseDN) {
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if utils.IncludeObjectClass(filterOC, constants.GetDomainOCs()) {
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entries = append(entries, ds.si.GetBaseEntry())
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}
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scope -= 1 // Bring it from WholeSubtree to SingleLevel and so on
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}
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var users *[]api.User
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var groups *[]api.Group
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errs, errCtx := errgroup.WithContext(req.Context())
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if needUsers {
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errs.Go(func() error {
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if flags.CanSearch {
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uapisp := sentry.StartSpan(errCtx, "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 nil
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}
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u := paginator.FetchUsers(searchReq)
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uapisp.Finish()
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users = &u
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} else {
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if flags.UserInfo == nil {
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uapisp := sentry.StartSpan(errCtx, "authentik.providers.ldap.search.api_user")
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u, _, err := c.CoreApi.CoreUsersRetrieve(uapisp.Context(), flags.UserPk).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 user info")
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return fmt.Errorf("failed to get userinfo")
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}
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flags.UserInfo = u
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}
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u := make([]api.User, 1)
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u[0] = *flags.UserInfo
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users = &u
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}
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return nil
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})
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}
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if needGroups {
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errs.Go(func() error {
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gapisp := sentry.StartSpan(errCtx, "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 nil
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}
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if !flags.CanSearch {
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// If they can't search, filter all groups by those they're a member of
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searchReq = searchReq.MembersByPk([]int32{flags.UserPk})
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}
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g := paginator.FetchGroups(searchReq)
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gapisp.Finish()
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req.Log().WithField("count", len(g)).Trace("Got results from API")
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if !flags.CanSearch {
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for i, results := range g {
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// If they can't search, remove any users from the group results except the one we're looking for.
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g[i].Users = []int32{flags.UserPk}
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for _, u := range results.UsersObj {
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if u.Pk == flags.UserPk {
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g[i].UsersObj = []api.GroupMember{u}
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break
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}
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}
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}
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}
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groups = &g
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return nil
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})
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}
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err = errs.Wait()
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if err != nil {
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return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultOperationsError}, err
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}
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if scope >= 0 && (strings.EqualFold(req.BaseDN, ds.si.GetBaseDN()) || utils.HasSuffixNoCase(req.BaseDN, ds.si.GetBaseUserDN())) {
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singleu := utils.HasSuffixNoCase(req.BaseDN, ","+ds.si.GetBaseUserDN())
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if !singleu && utils.IncludeObjectClass(filterOC, constants.GetContainerOCs()) {
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entries = append(entries, utils.GetContainerEntry(filterOC, ds.si.GetBaseUserDN(), constants.OUUsers))
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scope -= 1
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}
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if scope >= 0 && users != nil && utils.IncludeObjectClass(filterOC, constants.GetUserOCs()) {
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for _, u := range *users {
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entry := ds.si.UserEntry(u)
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if strings.EqualFold(req.BaseDN, entry.DN) || !singleu {
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entries = append(entries, entry)
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}
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}
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}
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scope += 1 // Return the scope to what it was before we descended
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}
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if scope >= 0 && (strings.EqualFold(req.BaseDN, ds.si.GetBaseDN()) || utils.HasSuffixNoCase(req.BaseDN, ds.si.GetBaseGroupDN())) {
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singleg := utils.HasSuffixNoCase(req.BaseDN, ","+ds.si.GetBaseGroupDN())
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if !singleg && utils.IncludeObjectClass(filterOC, constants.GetContainerOCs()) {
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entries = append(entries, utils.GetContainerEntry(filterOC, ds.si.GetBaseGroupDN(), constants.OUGroups))
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scope -= 1
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}
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if scope >= 0 && groups != nil && utils.IncludeObjectClass(filterOC, constants.GetGroupOCs()) {
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for _, g := range *groups {
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entry := group.FromAPIGroup(g, ds.si).Entry()
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if strings.EqualFold(req.BaseDN, entry.DN) || !singleg {
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entries = append(entries, entry)
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}
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}
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}
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scope += 1 // Return the scope to what it was before we descended
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}
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if scope >= 0 && (strings.EqualFold(req.BaseDN, ds.si.GetBaseDN()) || utils.HasSuffixNoCase(req.BaseDN, ds.si.GetBaseVirtualGroupDN())) {
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singlevg := utils.HasSuffixNoCase(req.BaseDN, ","+ds.si.GetBaseVirtualGroupDN())
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if !singlevg && utils.IncludeObjectClass(filterOC, constants.GetContainerOCs()) {
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entries = append(entries, utils.GetContainerEntry(filterOC, ds.si.GetBaseVirtualGroupDN(), constants.OUVirtualGroups))
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scope -= 1
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}
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if scope >= 0 && users != nil && utils.IncludeObjectClass(filterOC, constants.GetVirtualGroupOCs()) {
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for _, u := range *users {
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entry := group.FromAPIUser(u, ds.si).Entry()
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if strings.EqualFold(req.BaseDN, entry.DN) || !singlevg {
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entries = append(entries, entry)
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}
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}
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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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