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Fix group filter for ldap source sync (#22506) 

There are 2 separate flows of creating a user: authentication and source
sync.
When a group filter is defined, source sync ignores group filter, while
authentication respects it.
With this PR I've fixed this behavior, so both flows now apply this
filter when searching users in LDAP in a unified way.

- Unified LDAP group membership lookup for authentication and source
sync flows
- Replaced custom group membership lookup (used for authentication flow)
with an existing listLdapGroupMemberships method (used for source sync
flow)
- Modified listLdapGroupMemberships and getUserAttributeListedInGroup in
a way group lookup could be called separately
- Added user filtering based on a group membership for a source sync
- Added tests to cover this logic

Co-authored-by: Pavel Ezhov <paejov@gmail.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
This commit is contained in:
Pavel Ezhov 2023-02-02 10:45:00 +03:00 committed by GitHub
parent 9ef8bfb69b
commit 98770d3db8
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 160 additions and 78 deletions
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139
services/auth/source/ldap/source_search.go
View File

@ -196,22 +196,39 @@ func checkRestricted(l *ldap.Conn, ls *Source, userDN string) bool {
}
// List all group memberships of a user
func (source *Source) listLdapGroupMemberships(l *ldap.Conn, uid string) []string {
func (source *Source) listLdapGroupMemberships(l *ldap.Conn, uid string, applyGroupFilter bool) []string {
var ldapGroups []string
groupFilter := fmt.Sprintf("(%s=%s)", source.GroupMemberUID, ldap.EscapeFilter(uid))
var searchFilter string
groupFilter, ok := source.sanitizedGroupFilter(source.GroupFilter)
if !ok {
return ldapGroups
}
groupDN, ok := source.sanitizedGroupDN(source.GroupDN)
if !ok {
return ldapGroups
}
if applyGroupFilter {
searchFilter = fmt.Sprintf("(&(%s)(%s=%s))", groupFilter, source.GroupMemberUID, ldap.EscapeFilter(uid))
} else {
searchFilter = fmt.Sprintf("(%s=%s)", source.GroupMemberUID, ldap.EscapeFilter(uid))
}
result, err := l.Search(ldap.NewSearchRequest(
source.GroupDN,
groupDN,
ldap.ScopeWholeSubtree,
ldap.NeverDerefAliases,
0,
0,
false,
groupFilter,
searchFilter,
[]string{},
nil,
))
if err != nil {
log.Error("Failed group search using filter[%s]: %v", groupFilter, err)
log.Error("Failed group search in LDAP with filter [%s]: %v", searchFilter, err)
return ldapGroups
}
@ -238,9 +255,7 @@ func (source *Source) mapLdapGroupsToTeams() map[string]map[string][]string {
}
// getMappedMemberships : returns the organizations and teams to modify the users membership
func (source *Source) getMappedMemberships(l *ldap.Conn, uid string) (map[string][]string, map[string][]string) {
// get all LDAP group memberships for user
usersLdapGroups := source.listLdapGroupMemberships(l, uid)
func (source *Source) getMappedMemberships(usersLdapGroups []string, uid string) (map[string][]string, map[string][]string) {
// unmarshall LDAP group team map from configs
ldapGroupsToTeams := source.mapLdapGroupsToTeams()
membershipsToAdd := map[string][]string{}
@ -260,6 +275,14 @@ func (source *Source) getMappedMemberships(l *ldap.Conn, uid string) (map[string
return membershipsToAdd, membershipsToRemove
}
func (source *Source) getUserAttributeListedInGroup(entry *ldap.Entry) string {
if strings.ToLower(source.UserUID) == "dn" {
return entry.DN
}
return entry.GetAttributeValue(source.UserUID)
}
// SearchEntry : search an LDAP source if an entry (name, passwd) is valid and in the specific filter
func (source *Source) SearchEntry(name, passwd string, directBind bool) *SearchResult {
// See https://tools.ietf.org/search/rfc4513#section-5.1.2
@ -375,58 +398,30 @@ func (source *Source) SearchEntry(name, passwd string, directBind bool) *SearchR
firstname := sr.Entries[0].GetAttributeValue(source.AttributeName)
surname := sr.Entries[0].GetAttributeValue(source.AttributeSurname)
mail := sr.Entries[0].GetAttributeValue(source.AttributeMail)
uid := sr.Entries[0].GetAttributeValue(source.UserUID)
if source.UserUID == "dn" || source.UserUID == "DN" {
uid = sr.Entries[0].DN
}
teamsToAdd := make(map[string][]string)
teamsToRemove := make(map[string][]string)
// Check group membership
if source.GroupsEnabled && source.GroupFilter != "" {
groupFilter, ok := source.sanitizedGroupFilter(source.GroupFilter)
if !ok {
return nil
}
groupDN, ok := source.sanitizedGroupDN(source.GroupDN)
if !ok {
if source.GroupsEnabled {
userAttributeListedInGroup := source.getUserAttributeListedInGroup(sr.Entries[0])
usersLdapGroups := source.listLdapGroupMemberships(l, userAttributeListedInGroup, true)
if source.GroupFilter != "" && len(usersLdapGroups) == 0 {
return nil
}
log.Trace("Fetching groups '%v' with filter '%s' and base '%s'", source.GroupMemberUID, groupFilter, groupDN)
groupSearch := ldap.NewSearchRequest(
groupDN, ldap.ScopeWholeSubtree, ldap.NeverDerefAliases, 0, 0, false, groupFilter,
[]string{source.GroupMemberUID},
nil)
srg, err := l.Search(groupSearch)
if err != nil {
log.Error("LDAP group search failed: %v", err)
return nil
} else if len(srg.Entries) < 1 {
log.Error("LDAP group search failed: 0 entries")
return nil
}
isMember := false
Entries:
for _, group := range srg.Entries {
for _, member := range group.GetAttributeValues(source.GroupMemberUID) {
if (source.UserUID == "dn" && member == sr.Entries[0].DN) || member == uid {
isMember = true
break Entries
}
}
}
if !isMember {
log.Error("LDAP group membership test failed")
return nil
if source.GroupTeamMap != "" || source.GroupTeamMapRemoval {
teamsToAdd, teamsToRemove = source.getMappedMemberships(usersLdapGroups, userAttributeListedInGroup)
}
}
if isAttributeSSHPublicKeySet {
sshPublicKey = sr.Entries[0].GetAttributeValues(source.AttributeSSHPublicKey)
}
isAdmin := checkAdmin(l, source, userDN)
var isRestricted bool
if !isAdmin {
isRestricted = checkRestricted(l, source, userDN)
@ -436,12 +431,6 @@ func (source *Source) SearchEntry(name, passwd string, directBind bool) *SearchR
Avatar = sr.Entries[0].GetRawAttributeValue(source.AttributeAvatar)
}
teamsToAdd := make(map[string][]string)
teamsToRemove := make(map[string][]string)
if source.GroupsEnabled && (source.GroupTeamMap != "" || source.GroupTeamMapRemoval) {
teamsToAdd, teamsToRemove = source.getMappedMemberships(l, uid)
}
if !directBind && source.AttributesInBind {
// binds user (checking password) after looking-up attributes in BindDN context
err = bindUser(l, userDN, passwd)
@ -520,19 +509,29 @@ func (source *Source) SearchEntries() ([]*SearchResult, error) {
return nil, err
}
result := make([]*SearchResult, len(sr.Entries))
result := make([]*SearchResult, 0, len(sr.Entries))
for i, v := range sr.Entries {
for _, v := range sr.Entries {
teamsToAdd := make(map[string][]string)
teamsToRemove := make(map[string][]string)
if source.GroupsEnabled && (source.GroupTeamMap != "" || source.GroupTeamMapRemoval) {
userAttributeListedInGroup := v.GetAttributeValue(source.UserUID)
if source.UserUID == "dn" || source.UserUID == "DN" {
userAttributeListedInGroup = v.DN
if source.GroupsEnabled {
userAttributeListedInGroup := source.getUserAttributeListedInGroup(v)
if source.GroupFilter != "" {
usersLdapGroups := source.listLdapGroupMemberships(l, userAttributeListedInGroup, true)
if len(usersLdapGroups) == 0 {
continue
}
}
if source.GroupTeamMap != "" || source.GroupTeamMapRemoval {
usersLdapGroups := source.listLdapGroupMemberships(l, userAttributeListedInGroup, false)
teamsToAdd, teamsToRemove = source.getMappedMemberships(usersLdapGroups, userAttributeListedInGroup)
}
teamsToAdd, teamsToRemove = source.getMappedMemberships(l, userAttributeListedInGroup)
}
result[i] = &SearchResult{
user := &SearchResult{
Username: v.GetAttributeValue(source.AttributeUsername),
Name: v.GetAttributeValue(source.AttributeName),
Surname: v.GetAttributeValue(source.AttributeSurname),
@ -541,16 +540,22 @@ func (source *Source) SearchEntries() ([]*SearchResult, error) {
LdapTeamAdd: teamsToAdd,
LdapTeamRemove: teamsToRemove,
}
if !result[i].IsAdmin {
result[i].IsRestricted = checkRestricted(l, source, v.DN)
if !user.IsAdmin {
user.IsRestricted = checkRestricted(l, source, v.DN)
}
if isAttributeSSHPublicKeySet {
result[i].SSHPublicKey = v.GetAttributeValues(source.AttributeSSHPublicKey)
user.SSHPublicKey = v.GetAttributeValues(source.AttributeSSHPublicKey)
}
if isAtributeAvatarSet {
result[i].Avatar = v.GetRawAttributeValue(source.AttributeAvatar)
user.Avatar = v.GetRawAttributeValue(source.AttributeAvatar)
}
result[i].LowerName = strings.ToLower(result[i].Username)
user.LowerName = strings.ToLower(user.Username)
result = append(result, user)
}
return result, nil

99
tests/integration/auth_ldap_test.go
View File

@ -11,12 +11,14 @@ import (
"testing"
"code.gitea.io/gitea/models"
auth_model "code.gitea.io/gitea/models/auth"
"code.gitea.io/gitea/models/db"
"code.gitea.io/gitea/models/organization"
"code.gitea.io/gitea/models/unittest"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/translation"
"code.gitea.io/gitea/services/auth"
"code.gitea.io/gitea/services/auth/source/ldap"
"code.gitea.io/gitea/tests"
"github.com/stretchr/testify/assert"
@ -102,13 +104,28 @@ func getLDAPServerHost() string {
return host
}
func addAuthSourceLDAP(t *testing.T, sshKeyAttribute string, groupMapParams ...string) {
func getLDAPServerPort() string {
port := os.Getenv("TEST_LDAP_PORT")
if len(port) == 0 {
port = "389"
}
return port
}
func addAuthSourceLDAP(t *testing.T, sshKeyAttribute, groupFilter string, groupMapParams ...string) {
groupTeamMapRemoval := "off"
groupTeamMap := ""
if len(groupMapParams) == 2 {
groupTeamMapRemoval = groupMapParams[0]
groupTeamMap = groupMapParams[1]
}
// Modify user filter to test group filter explicitly
userFilter := "(&(objectClass=inetOrgPerson)(memberOf=cn=git,ou=people,dc=planetexpress,dc=com)(uid=%s))"
if groupFilter != "" {
userFilter = "(&(objectClass=inetOrgPerson)(uid=%s))"
}
session := loginUser(t, "user1")
csrf := GetCSRF(t, session, "/admin/auths/new")
req := NewRequestWithValues(t, "POST", "/admin/auths/new", map[string]string{
@ -116,11 +133,11 @@ func addAuthSourceLDAP(t *testing.T, sshKeyAttribute string, groupMapParams ...s
"type": "2",
"name": "ldap",
"host": getLDAPServerHost(),
"port": "389",
"port": getLDAPServerPort(),
"bind_dn": "uid=gitea,ou=service,dc=planetexpress,dc=com",
"bind_password": "password",
"user_base": "ou=people,dc=planetexpress,dc=com",
"filter": "(&(objectClass=inetOrgPerson)(memberOf=cn=git,ou=people,dc=planetexpress,dc=com)(uid=%s))",
"filter": userFilter,
"admin_filter": "(memberOf=cn=admin_staff,ou=people,dc=planetexpress,dc=com)",
"restricted_filter": "(uid=leela)",
"attribute_username": "uid",
@ -133,6 +150,7 @@ func addAuthSourceLDAP(t *testing.T, sshKeyAttribute string, groupMapParams ...s
"groups_enabled": "on",
"group_dn": "ou=people,dc=planetexpress,dc=com",
"group_member_uid": "member",
"group_filter": groupFilter,
"group_team_map": groupTeamMap,
"group_team_map_removal": groupTeamMapRemoval,
"user_uid": "DN",
@ -146,7 +164,7 @@ func TestLDAPUserSignin(t *testing.T) {
return
}
defer tests.PrepareTestEnv(t)()
addAuthSourceLDAP(t, "")
addAuthSourceLDAP(t, "", "")
u := gitLDAPUsers[0]
@ -163,7 +181,7 @@ func TestLDAPUserSignin(t *testing.T) {
func TestLDAPAuthChange(t *testing.T) {
defer tests.PrepareTestEnv(t)()
addAuthSourceLDAP(t, "")
addAuthSourceLDAP(t, "", "")
session := loginUser(t, "user1")
req := NewRequest(t, "GET", "/admin/auths")
@ -221,7 +239,7 @@ func TestLDAPUserSync(t *testing.T) {
return
}
defer tests.PrepareTestEnv(t)()
addAuthSourceLDAP(t, "")
addAuthSourceLDAP(t, "", "")
auth.SyncExternalUsers(context.Background(), true)
session := loginUser(t, "user1")
@ -266,13 +284,72 @@ func TestLDAPUserSync(t *testing.T) {
}
}
func TestLDAPUserSyncWithGroupFilter(t *testing.T) {
if skipLDAPTests() {
t.Skip()
return
}
defer tests.PrepareTestEnv(t)()
addAuthSourceLDAP(t, "", "(cn=git)")
// Assert a user not a member of the LDAP group "cn=git" cannot login
// This test may look like TestLDAPUserSigninFailed but it is not.
// The later test uses user filter containing group membership filter (memberOf)
// This test is for the case when LDAP user records may not be linked with
// all groups the user is a member of, the user filter is modified accordingly inside
// the addAuthSourceLDAP based on the value of the groupFilter
u := otherLDAPUsers[0]
testLoginFailed(t, u.UserName, u.Password, translation.NewLocale("en-US").Tr("form.username_password_incorrect"))
auth.SyncExternalUsers(context.Background(), true)
// Assert members of LDAP group "cn=git" are added
for _, gitLDAPUser := range gitLDAPUsers {
unittest.BeanExists(t, &user_model.User{
Name: gitLDAPUser.UserName,
})
}
// Assert everyone else is not added
for _, gitLDAPUser := range otherLDAPUsers {
unittest.AssertNotExistsBean(t, &user_model.User{
Name: gitLDAPUser.UserName,
})
}
ldapSource := unittest.AssertExistsAndLoadBean(t, &auth_model.Source{
Name: "ldap",
})
ldapConfig := ldapSource.Cfg.(*ldap.Source)
ldapConfig.GroupFilter = "(cn=ship_crew)"
auth_model.UpdateSource(ldapSource)
auth.SyncExternalUsers(context.Background(), true)
for _, gitLDAPUser := range gitLDAPUsers {
if gitLDAPUser.UserName == "fry" || gitLDAPUser.UserName == "leela" || gitLDAPUser.UserName == "bender" {
// Assert members of the LDAP group "cn-ship_crew" are still active
user := unittest.AssertExistsAndLoadBean(t, &user_model.User{
Name: gitLDAPUser.UserName,
})
assert.True(t, user.IsActive, "User %s should be active", gitLDAPUser.UserName)
} else {
// Assert everyone else is inactive
user := unittest.AssertExistsAndLoadBean(t, &user_model.User{
Name: gitLDAPUser.UserName,
})
assert.False(t, user.IsActive, "User %s should be inactive", gitLDAPUser.UserName)
}
}
}
func TestLDAPUserSigninFailed(t *testing.T) {
if skipLDAPTests() {
t.Skip()
return
}
defer tests.PrepareTestEnv(t)()
addAuthSourceLDAP(t, "")
addAuthSourceLDAP(t, "", "")
u := otherLDAPUsers[0]
testLoginFailed(t, u.UserName, u.Password, translation.NewLocale("en-US").Tr("form.username_password_incorrect"))
@ -284,7 +361,7 @@ func TestLDAPUserSSHKeySync(t *testing.T) {
return
}
defer tests.PrepareTestEnv(t)()
addAuthSourceLDAP(t, "sshPublicKey")
addAuthSourceLDAP(t, "sshPublicKey", "")
auth.SyncExternalUsers(context.Background(), true)
@ -317,7 +394,7 @@ func TestLDAPGroupTeamSyncAddMember(t *testing.T) {
return
}
defer tests.PrepareTestEnv(t)()
addAuthSourceLDAP(t, "", "on", `{"cn=ship_crew,ou=people,dc=planetexpress,dc=com":{"org26": ["team11"]},"cn=admin_staff,ou=people,dc=planetexpress,dc=com": {"non-existent": ["non-existent"]}}`)
addAuthSourceLDAP(t, "", "", "on", `{"cn=ship_crew,ou=people,dc=planetexpress,dc=com":{"org26": ["team11"]},"cn=admin_staff,ou=people,dc=planetexpress,dc=com": {"non-existent": ["non-existent"]}}`)
org, err := organization.GetOrgByName("org26")
assert.NoError(t, err)
team, err := organization.GetTeam(db.DefaultContext, org.ID, "team11")
@ -362,7 +439,7 @@ func TestLDAPGroupTeamSyncRemoveMember(t *testing.T) {
return
}
defer tests.PrepareTestEnv(t)()
addAuthSourceLDAP(t, "", "on", `{"cn=dispatch,ou=people,dc=planetexpress,dc=com": {"org26": ["team11"]}}`)
addAuthSourceLDAP(t, "", "", "on", `{"cn=dispatch,ou=people,dc=planetexpress,dc=com": {"org26": ["team11"]}}`)
org, err := organization.GetOrgByName("org26")
assert.NoError(t, err)
team, err := organization.GetTeam(db.DefaultContext, org.ID, "team11")
@ -398,7 +475,7 @@ func TestBrokenLDAPMapUserSignin(t *testing.T) {
return
}
defer tests.PrepareTestEnv(t)()
addAuthSourceLDAP(t, "", "on", `{"NOT_A_VALID_JSON"["MISSING_DOUBLE_POINT"]}`)
addAuthSourceLDAP(t, "", "", "on", `{"NOT_A_VALID_JSON"["MISSING_DOUBLE_POINT"]}`)
u := gitLDAPUsers[0]