outposts/ldap: return user info when user can't search

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

outpost/pkg/ldap/instance_bind.go

@@ -53,8 +53,6 @@ func (pi *ProviderInstance) Bind(username string, bindDN, bindPW string, conn ne
 
 	// Create new http client that also sets the correct ip
 	config := api.NewConfiguration()
-	// Carry over the bearer authentication, so that failed login attempts are attributed to the outpost
-	config.DefaultHeader = pi.s.ac.Client.GetConfig().DefaultHeader
 	config.Host = pi.s.ac.Client.GetConfig().Host
 	config.Scheme = pi.s.ac.Client.GetConfig().Scheme
 	config.HTTPClient = &http.Client{
@@ -76,7 +74,7 @@ func (pi *ProviderInstance) Bind(username string, bindDN, bindPW string, conn ne
 	if !passed {
 		return ldap.LDAPResultInvalidCredentials, nil
 	}
-	r, err := pi.s.ac.Client.CoreApi.CoreApplicationsCheckAccessRetrieve(context.Background(), pi.appSlug).Execute()
+	r, err := apiClient.CoreApi.CoreApplicationsCheckAccessRetrieve(context.Background(), pi.appSlug).Execute()
 	if r.StatusCode == 403 {
 		pi.log.WithField("bindDN", bindDN).Info("Access denied for user")
 		return ldap.LDAPResultInsufficientAccessRights, nil
@@ -87,7 +85,7 @@ func (pi *ProviderInstance) Bind(username string, bindDN, bindPW string, conn ne
 	}
 	pi.log.WithField("bindDN", bindDN).Info("User has access")
 	// Get user info to store in context
-	userInfo, _, err := pi.s.ac.Client.CoreApi.CoreUsersMeRetrieve(context.Background()).Execute()
+	userInfo, _, err := apiClient.CoreApi.CoreUsersMeRetrieve(context.Background()).Execute()
 	if err != nil {
 		pi.log.WithField("bindDN", bindDN).WithError(err).Warning("failed to get user info")
 		return ldap.LDAPResultOperationsError, nil

outpost/pkg/ldap/instance_search.go

@@ -8,8 +8,15 @@ import (
 	"strings"
 
 	"github.com/nmcclain/ldap"
+	"goauthentik.io/outpost/api"
 )
 
+func (pi *ProviderInstance) SearchMe(user api.User, searchReq ldap.SearchRequest, conn net.Conn) (ldap.ServerSearchResult, error) {
+	entries := make([]*ldap.Entry, 1)
+	entries[0] = pi.UserEntry(user)
+	return ldap.ServerSearchResult{Entries: entries, Referrals: []string{}, Controls: []ldap.Control{}, ResultCode: ldap.LDAPResultSuccess}, nil
+}
+
 func (pi *ProviderInstance) Search(bindDN string, searchReq ldap.SearchRequest, conn net.Conn) (ldap.ServerSearchResult, error) {
 	bindDN = strings.ToLower(bindDN)
 	baseDN := strings.ToLower("," + pi.BaseDN)
@@ -29,14 +36,13 @@ func (pi *ProviderInstance) Search(bindDN string, searchReq ldap.SearchRequest,
 	pi.boundUsersMutex.RLock()
 	defer pi.boundUsersMutex.RUnlock()
 	flags, ok := pi.boundUsers[bindDN]
-	pi.log.WithField("bindDN", bindDN).WithField("ok", ok).Debugf("%+v\n", flags)
 	if !ok {
 		pi.log.Debug("User info not cached")
 		return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultInsufficientAccessRights}, errors.New("access denied")
 	}
 	if !flags.CanSearch {
-		pi.log.Debug("User can't search")
-		return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultInsufficientAccessRights}, errors.New("access denied")
+		pi.log.Debug("User can't search, showing info about user")
+		return pi.SearchMe(flags.UserInfo, searchReq, conn)
 	}
 
 	switch filterEntity {
@@ -49,24 +55,7 @@ func (pi *ProviderInstance) Search(bindDN string, searchReq ldap.SearchRequest,
 		}
 		pi.log.WithField("count", len(groups.Results)).Trace("Got results from API")
 		for _, g := range groups.Results {
-			attrs := []*ldap.EntryAttribute{
-				{
-					Name:   "cn",
-					Values: []string{g.Name},
-				},
-				{
-					Name:   "uid",
-					Values: []string{string(g.Pk)},
-				},
-				{
-					Name:   "objectClass",
-					Values: []string{GroupObjectClass, "goauthentik.io/ldap/group"},
-				},
-			}
-			attrs = append(attrs, AKAttrsToLDAP(g.Attributes)...)
-
-			dn := pi.GetGroupDN(g)
-			entries = append(entries, &ldap.Entry{DN: dn, Attributes: attrs})
+			entries = append(entries, pi.GroupEntry(g))
 		}
 	case UserObjectClass, "":
 		users, _, err := pi.s.ac.Client.CoreApi.CoreUsersList(context.Background()).Execute()
@@ -74,6 +63,14 @@ func (pi *ProviderInstance) Search(bindDN string, searchReq ldap.SearchRequest,
 			return ldap.ServerSearchResult{ResultCode: ldap.LDAPResultOperationsError}, fmt.Errorf("API Error: %s", err)
 		}
 		for _, u := range users.Results {
+			entries = append(entries, pi.UserEntry(u))
+		}
+	}
+	pi.log.WithField("filter", searchReq.Filter).Debug("Search OK")
+	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",
@@ -118,9 +115,27 @@ func (pi *ProviderInstance) Search(bindDN string, searchReq ldap.SearchRequest,
 	attrs = append(attrs, AKAttrsToLDAP(u.Attributes)...)
 
 	dn := fmt.Sprintf("cn=%s,%s", u.Username, pi.UserDN)
-			entries = append(entries, &ldap.Entry{DN: dn, Attributes: attrs})
+
+	return &ldap.Entry{DN: dn, Attributes: attrs}
 }
+
+func (pi *ProviderInstance) GroupEntry(g api.Group) *ldap.Entry {
+	attrs := []*ldap.EntryAttribute{
+		{
+			Name:   "cn",
+			Values: []string{g.Name},
+		},
+		{
+			Name:   "uid",
+			Values: []string{string(g.Pk)},
+		},
+		{
+			Name:   "objectClass",
+			Values: []string{GroupObjectClass, "goauthentik.io/ldap/group"},
+		},
 	}
-	pi.log.WithField("filter", searchReq.Filter).Debug("Search OK")
-	return ldap.ServerSearchResult{Entries: entries, Referrals: []string{}, Controls: []ldap.Control{}, ResultCode: ldap.LDAPResultSuccess}, nil
+	attrs = append(attrs, AKAttrsToLDAP(g.Attributes)...)
+
+	dn := pi.GetGroupDN(g)
+	return &ldap.Entry{DN: dn, Attributes: attrs}
 }

outpost/pkg/ldap/utils.go

@@ -9,7 +9,8 @@ import (
 
 func AKAttrsToLDAP(attrs interface{}) []*ldap.EntryAttribute {
 	attrList := []*ldap.EntryAttribute{}
-	for attrKey, attrValue := range attrs.(map[string]interface{}) {
+	a := attrs.(*map[string]interface{})
+	for attrKey, attrValue := range *a {
 		entry := &ldap.EntryAttribute{Name: attrKey}
 		switch t := attrValue.(type) {
 		case []string: