mirror of
https://github.com/gravitational/teleport.git
synced 2026-10-25 18:59:51 +08:00
Krzysztof Skrzętnicki
d8fe3a6d8f
* Extract Kerberos functionality from SQL Server engine * fix typo, add missing trace.Wrap()
71 lines
2.0 KiB
Go
71 lines
2.0 KiB
Go
/*
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* Teleport
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* Copyright (C) 2023 Gravitational, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package sqlserver
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import (
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"github.com/gravitational/trace"
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"github.com/jcmturner/gokrb5/v8/client"
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"github.com/jcmturner/gokrb5/v8/spnego"
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"github.com/gravitational/teleport/lib/srv/db/common"
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)
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// getAuth returns Kerberos authenticator used by SQL Server driver.
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//
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// TODO(r0mant): Unit-test this. In-memory Kerberos server?
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func (c *connector) getAuth(sessionCtx *common.Session, kbClient *client.Client) (*krbAuth, error) {
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// Obtain service ticket for the database's Service Principal Name.
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ticket, encryptionKey, err := kbClient.GetServiceTicket(sessionCtx.Database.GetAD().SPN)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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// Create init negotiation token.
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initToken, err := spnego.NewNegTokenInitKRB5(kbClient, ticket, encryptionKey)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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// Marshal init negotiation token.
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initTokenBytes, err := initToken.Marshal()
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if err != nil {
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return nil, trace.Wrap(err)
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}
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return &krbAuth{
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initToken: initTokenBytes,
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}, nil
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}
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// krbAuth implements SQL Server driver's "auth" interface used during login
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// to provide Kerberos authentication.
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type krbAuth struct {
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initToken []byte
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}
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func (a *krbAuth) InitialBytes() ([]byte, error) {
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return a.initToken, nil
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}
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func (a *krbAuth) NextBytes(bytes []byte) ([]byte, error) {
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return nil, nil
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}
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func (a *krbAuth) Free() {}
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