121 lines
3.3 KiB
Go
121 lines
3.3 KiB
Go
package ldap
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import (
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"context"
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"errors"
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"strings"
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"time"
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"github.com/getsentry/sentry-go"
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goldap "github.com/go-ldap/ldap/v3"
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"github.com/nmcclain/ldap"
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log "github.com/sirupsen/logrus"
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"goauthentik.io/api"
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"goauthentik.io/internal/outpost"
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)
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const ContextUserKey = "ak_user"
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func (pi *ProviderInstance) getUsername(dn string) (string, error) {
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if !strings.HasSuffix(strings.ToLower(dn), strings.ToLower(pi.BaseDN)) {
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return "", errors.New("invalid base DN")
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}
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dns, err := goldap.ParseDN(dn)
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if err != nil {
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return "", err
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}
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for _, part := range dns.RDNs {
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for _, attribute := range part.Attributes {
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if strings.ToLower(attribute.Type) == "cn" {
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return attribute.Value, nil
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}
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}
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}
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return "", errors.New("failed to find cn")
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}
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func (pi *ProviderInstance) Bind(username string, req BindRequest) (ldap.LDAPResultCode, error) {
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fe := outpost.NewFlowExecutor(req.ctx, pi.flowSlug, pi.s.ac.Client.GetConfig(), log.Fields{
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"bindDN": req.BindDN,
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"client": req.conn.RemoteAddr().String(),
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"requestId": req.id,
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})
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fe.DelegateClientIP(req.conn.RemoteAddr())
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fe.Params.Add("goauthentik.io/outpost/ldap", "true")
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fe.Answers[outpost.StageIdentification] = username
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fe.Answers[outpost.StagePassword] = req.BindPW
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passed, err := fe.Execute()
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if !passed {
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return ldap.LDAPResultInvalidCredentials, nil
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}
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if err != nil {
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req.log.WithError(err).Warning("failed to execute flow")
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return ldap.LDAPResultOperationsError, nil
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}
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access, err := fe.CheckApplicationAccess(pi.appSlug)
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if !access {
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req.log.Info("Access denied for user")
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return ldap.LDAPResultInsufficientAccessRights, nil
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}
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if err != nil {
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req.log.WithError(err).Warning("failed to check access")
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return ldap.LDAPResultOperationsError, nil
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}
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req.log.Info("User has access")
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uisp := sentry.StartSpan(req.ctx, "authentik.providers.ldap.bind.user_info")
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// Get user info to store in context
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userInfo, _, err := fe.ApiClient().CoreApi.CoreUsersMeRetrieve(context.Background()).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.LDAPResultOperationsError, nil
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}
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pi.boundUsersMutex.Lock()
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cs := pi.SearchAccessCheck(userInfo.User)
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pi.boundUsers[req.BindDN] = UserFlags{
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UserInfo: userInfo.User,
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CanSearch: cs != nil,
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}
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if pi.boundUsers[req.BindDN].CanSearch {
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req.log.WithField("group", cs).Info("Allowed access to search")
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}
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uisp.Finish()
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defer pi.boundUsersMutex.Unlock()
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pi.delayDeleteUserInfo(username)
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return ldap.LDAPResultSuccess, nil
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}
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// SearchAccessCheck Check if the current user is allowed to search
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func (pi *ProviderInstance) SearchAccessCheck(user api.User) *string {
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for _, group := range user.Groups {
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for _, allowedGroup := range pi.searchAllowedGroups {
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pi.log.WithField("userGroup", group.Pk).WithField("allowedGroup", allowedGroup).Trace("Checking search access")
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if group.Pk == allowedGroup.String() {
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return &group.Name
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}
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}
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}
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return nil
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}
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func (pi *ProviderInstance) delayDeleteUserInfo(dn string) {
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ticker := time.NewTicker(30 * time.Second)
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quit := make(chan struct{})
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go func() {
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for {
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select {
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case <-ticker.C:
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pi.boundUsersMutex.Lock()
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delete(pi.boundUsers, dn)
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pi.boundUsersMutex.Unlock()
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close(quit)
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case <-quit:
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ticker.Stop()
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return
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}
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}
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}()
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}
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