outposts/ldap: move virtual groups to other OU for lookups, conditionally skip requests based on search filter
Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>
This commit is contained in:
parent
23fd257624
commit
294d70ae4d
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@ -150,8 +150,8 @@ class UsersFilter(FilterSet):
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is_superuser = BooleanFilter(field_name="ak_groups", lookup_expr="is_superuser")
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groups_by_name = ModelMultipleChoiceFilter(
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field_name="ak_groups__username",
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to_field_name="username",
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field_name="ak_groups__name",
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to_field_name="name",
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queryset=Group.objects.all(),
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)
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groups_by_pk = ModelMultipleChoiceFilter(
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@ -15,6 +15,12 @@ import (
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log "github.com/sirupsen/logrus"
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)
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const (
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UsersOU = "users"
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GroupsOU = "groups"
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VirtualGroupsOU = "virtual-groups"
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)
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func (ls *LDAPServer) Refresh() error {
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outposts, _, err := ls.ac.Client.OutpostsApi.OutpostsLdapList(context.Background()).Execute()
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if err != nil {
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@ -25,11 +31,13 @@ func (ls *LDAPServer) Refresh() error {
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}
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providers := make([]*ProviderInstance, len(outposts.Results))
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for idx, provider := range outposts.Results {
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userDN := strings.ToLower(fmt.Sprintf("ou=users,%s", *provider.BaseDn))
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groupDN := strings.ToLower(fmt.Sprintf("ou=groups,%s", *provider.BaseDn))
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userDN := strings.ToLower(fmt.Sprintf("ou=%s,%s", UsersOU, *provider.BaseDn))
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groupDN := strings.ToLower(fmt.Sprintf("ou=%s,%s", GroupsOU, *provider.BaseDn))
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virtualGroupDN := strings.ToLower(fmt.Sprintf("ou=%s,%s", VirtualGroupsOU, *provider.BaseDn))
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logger := log.WithField("logger", "authentik.outpost.ldap").WithField("provider", provider.Name)
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providers[idx] = &ProviderInstance{
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BaseDN: *provider.BaseDn,
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VirtualGroupDN: virtualGroupDN,
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GroupDN: groupDN,
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UserDN: userDN,
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appSlug: provider.ApplicationSlug,
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@ -59,6 +59,10 @@ func (pi *ProviderInstance) Search(req SearchRequest) (ldap.ServerSearchResult,
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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(pi.s.ac.Client.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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return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultOperationsError}, fmt.Errorf("Search Error: unhandled filter type: %s [%s]", filterEntity, req.Filter)
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@ -72,7 +76,12 @@ func (pi *ProviderInstance) Search(req SearchRequest) (ldap.ServerSearchResult,
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go func() {
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defer wg.Done()
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gapisp := sentry.StartSpan(req.ctx, "authentik.providers.ldap.search.api_group")
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groups, _, err := parseFilterForGroup(pi.s.ac.Client.CoreApi.CoreGroupsList(gapisp.Context()), parsedFilter).Execute()
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searchReq, skip := parseFilterForGroup(c.CoreApi.CoreGroupsList(gapisp.Context()), parsedFilter, false)
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if skip {
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pi.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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@ -88,7 +97,12 @@ func (pi *ProviderInstance) Search(req SearchRequest) (ldap.ServerSearchResult,
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go func() {
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defer wg.Done()
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uapisp := sentry.StartSpan(req.ctx, "authentik.providers.ldap.search.api_user")
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users, _, err := parseFilterForUser(pi.s.ac.Client.CoreApi.CoreUsersList(uapisp.Context()), parsedFilter).Execute()
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searchReq, skip := parseFilterForUser(c.CoreApi.CoreUsersList(uapisp.Context()), parsedFilter, false)
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if skip {
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pi.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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@ -103,7 +117,12 @@ func (pi *ProviderInstance) Search(req SearchRequest) (ldap.ServerSearchResult,
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entries = append(gEntries, uEntries...)
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case UserObjectClass, "":
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uapisp := sentry.StartSpan(req.ctx, "authentik.providers.ldap.search.api_user")
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users, _, err := parseFilterForUser(pi.s.ac.Client.CoreApi.CoreUsersList(uapisp.Context()), parsedFilter).Execute()
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searchReq, skip := parseFilterForUser(c.CoreApi.CoreUsersList(uapisp.Context()), parsedFilter, false)
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if skip {
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pi.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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@ -7,52 +7,62 @@ import (
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"goauthentik.io/api"
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)
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func parseFilterForGroup(req api.ApiCoreGroupsListRequest, f *ber.Packet) api.ApiCoreGroupsListRequest {
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func parseFilterForGroup(req api.ApiCoreGroupsListRequest, f *ber.Packet, skip bool) (api.ApiCoreGroupsListRequest, bool) {
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switch f.Tag {
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case ldap.FilterEqualityMatch:
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return parseFilterForGroupSingle(req, f)
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case ldap.FilterAnd:
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for _, child := range f.Children {
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req = parseFilterForGroup(req, child)
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r, s := parseFilterForGroup(req, child, skip)
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skip = skip || s
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req = r
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}
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return req
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return req, skip
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}
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return req
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return req, skip
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}
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func parseFilterForGroupSingle(req api.ApiCoreGroupsListRequest, f *ber.Packet) api.ApiCoreGroupsListRequest {
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func parseFilterForGroupSingle(req api.ApiCoreGroupsListRequest, f *ber.Packet) (api.ApiCoreGroupsListRequest, bool) {
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// We can only handle key = value pairs here
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if len(f.Children) < 2 {
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return req
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return req, false
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}
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k := f.Children[0].Value
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// Ensure key is string
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if _, ok := k.(string); !ok {
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return req
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return req, false
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}
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v := f.Children[1].Value
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// Null values are ignored
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if v == nil {
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return req
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return req, false
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}
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// Switch on type of the value, then check the key
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switch vv := v.(type) {
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case string:
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switch k {
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case "cn":
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return req.Name(vv)
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return req.Name(vv), false
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case "member":
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fallthrough
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case "memberOf":
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userDN, err := goldap.ParseDN(vv)
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if err != nil {
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return req
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return req.MembersByUsername([]string{vv}), false
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}
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username := userDN.RDNs[0].Attributes[0].Value
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return req.MembersByUsername([]string{username})
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// If the DN's first ou is virtual-groups, ignore this filter
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if len(userDN.RDNs) > 1 {
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if userDN.RDNs[1].Attributes[0].Value == VirtualGroupsOU || userDN.RDNs[1].Attributes[0].Value == GroupsOU {
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// Since we know we're not filtering anything, skip this request
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return req, true
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}
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}
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return req.MembersByUsername([]string{username}), false
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}
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// TODO: Support int
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default:
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return req
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return req, false
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}
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return req
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return req, false
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}
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@ -7,57 +7,67 @@ import (
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"goauthentik.io/api"
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)
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func parseFilterForUser(req api.ApiCoreUsersListRequest, f *ber.Packet) api.ApiCoreUsersListRequest {
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func parseFilterForUser(req api.ApiCoreUsersListRequest, f *ber.Packet, skip bool) (api.ApiCoreUsersListRequest, bool) {
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switch f.Tag {
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case ldap.FilterEqualityMatch:
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return parseFilterForUserSingle(req, f)
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case ldap.FilterAnd:
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for _, child := range f.Children {
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req = parseFilterForUser(req, child)
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r, s := parseFilterForUser(req, child, skip)
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skip = skip || s
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req = r
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}
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return req
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return req, skip
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}
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return req
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return req, skip
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}
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func parseFilterForUserSingle(req api.ApiCoreUsersListRequest, f *ber.Packet) api.ApiCoreUsersListRequest {
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func parseFilterForUserSingle(req api.ApiCoreUsersListRequest, f *ber.Packet) (api.ApiCoreUsersListRequest, bool) {
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// We can only handle key = value pairs here
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if len(f.Children) < 2 {
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return req
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return req, false
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}
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k := f.Children[0].Value
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// Ensure key is string
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if _, ok := k.(string); !ok {
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return req
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return req, false
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}
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v := f.Children[1].Value
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// Null values are ignored
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if v == nil {
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return req
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return req, false
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}
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// Switch on type of the value, then check the key
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switch vv := v.(type) {
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case string:
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switch k {
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case "cn":
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return req.Username(vv)
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return req.Username(vv), false
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case "name":
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case "displayName":
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return req.Name(vv)
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return req.Name(vv), false
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case "mail":
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return req.Email(vv)
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return req.Email(vv), false
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case "member":
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fallthrough
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case "memberOf":
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groupDN, err := goldap.ParseDN(vv)
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if err != nil {
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return req
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return req.GroupsByName([]string{vv}), false
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}
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name := groupDN.RDNs[0].Attributes[0].Value
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return req.GroupsByName([]string{name})
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// If the DN's first ou is virtual-groups, ignore this filter
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if len(groupDN.RDNs) > 1 {
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if groupDN.RDNs[1].Attributes[0].Value == UsersOU || groupDN.RDNs[1].Attributes[0].Value == VirtualGroupsOU {
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// Since we know we're not filtering anything, skip this request
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return req, true
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}
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}
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return req.GroupsByName([]string{name}), false
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}
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// TODO: Support int
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default:
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return req
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return req, false
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}
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return req
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return req, false
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}
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@ -19,8 +19,10 @@ const UserObjectClass = "user"
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type ProviderInstance struct {
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BaseDN string
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UserDN string
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GroupDN string
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UserDN string
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VirtualGroupDN string
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GroupDN string
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appSlug string
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flowSlug string
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@ -95,7 +95,7 @@ func (pi *ProviderInstance) APIGroupToLDAPGroup(g api.Group) LDAPGroup {
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func (pi *ProviderInstance) APIUserToLDAPGroup(u api.User) LDAPGroup {
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return LDAPGroup{
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dn: pi.GetGroupDN(u.Username),
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dn: pi.GetVirtualGroupDN(u.Username),
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cn: u.Username,
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uid: u.Uid,
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gidNumber: pi.GetUidNumber(u),
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@ -114,6 +114,10 @@ func (pi *ProviderInstance) GetGroupDN(group string) string {
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return fmt.Sprintf("cn=%s,%s", group, pi.GroupDN)
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}
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func (pi *ProviderInstance) GetVirtualGroupDN(group string) string {
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return fmt.Sprintf("cn=%s,%s", group, pi.VirtualGroupDN)
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}
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func (pi *ProviderInstance) GetUidNumber(user api.User) string {
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return strconv.FormatInt(int64(pi.uidStartNumber+user.Pk), 10)
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}
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@ -14,7 +14,7 @@ Binding against the LDAP Server uses a flow in the background. This allows you t
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You can configure under which base DN the information should be available. For this documentation we'll use the default of `DC=ldap,DC=goauthentik,DC=io`.
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Users are available under `ou=users,<base DN>` and groups under `ou=groups,<base DN>`.
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Users are available under `ou=users,<base DN>` and groups under `ou=groups,<base DN>`. To aid compatibility, each user belongs to its own "virtual" group, as is standard on most Unix-like systems. This group does not exist in the authentik database, and is generated on the fly. These virtual groups are under the `ou=virtual-groups,<base DN>` DN.
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You can bind using the DN `cn=<username>,ou=users,<base DN>`, or using the following ldapsearch command for example:
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