116 lines
3.3 KiB
Go
116 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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"net"
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"strings"
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"time"
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goldap "github.com/go-ldap/ldap/v3"
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"github.com/nmcclain/ldap"
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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, bindDN, bindPW string, conn net.Conn) (ldap.LDAPResultCode, error) {
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host, _, err := net.SplitHostPort(conn.RemoteAddr().String())
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if err != nil {
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pi.log.WithError(err).Warning("Failed to get remote IP")
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return ldap.LDAPResultOperationsError, nil
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}
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fe := outpost.NewFlowExecutor(pi.flowSlug, pi.s.ac.Client.GetConfig())
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fe.ApiClient().GetConfig().AddDefaultHeader("X-authentik-remote-ip", host)
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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] = 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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pi.log.WithField("bindDN", bindDN).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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pi.log.WithField("bindDN", bindDN).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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pi.log.WithField("bindDN", bindDN).WithError(err).Warning("failed to check access")
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return ldap.LDAPResultOperationsError, nil
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}
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pi.log.WithField("bindDN", bindDN).Info("User has access")
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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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pi.log.WithField("bindDN", bindDN).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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pi.boundUsers[bindDN] = UserFlags{
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UserInfo: userInfo.User,
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CanSearch: pi.SearchAccessCheck(userInfo.User),
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}
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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) bool {
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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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pi.log.WithField("group", group.Name).Info("Allowed access to search")
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return true
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}
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}
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}
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return false
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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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