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/*
Unix SMB/CIFS implementation.
Do a netr_LogonSamLogon to a remote DC
Copyright (C) Volker Lendecke 2005
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
Copyright (C) Stefan Metzmacher 2006
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "libcli/composite/composite.h"
#include "winbind/wb_server.h"
#include "smbd/service_task.h"
#include "auth/credentials/credentials.h"
#include "libcli/auth/libcli_auth.h"
#include "librpc/gen_ndr/ndr_netlogon_c.h"
#include "librpc/gen_ndr/winbind.h"
struct wb_sam_logon_state {
struct composite_context *ctx;
struct winbind_SamLogon *req;
struct netlogon_creds_CredentialState *creds_state;
struct netr_Authenticator auth1, auth2;
TALLOC_CTX *r_mem_ctx;
struct netr_LogonSamLogon r;
};
static void wb_sam_logon_recv_domain(struct composite_context *ctx);
static void wb_sam_logon_recv_samlogon(struct tevent_req *subreq);
/*
Find the connection to the DC (or find an existing connection)
*/
struct composite_context *wb_sam_logon_send(TALLOC_CTX *mem_ctx,
struct wbsrv_service *service,
struct winbind_SamLogon *req)
{
struct composite_context *c, *creq;
struct wb_sam_logon_state *s;
c = composite_create(mem_ctx, service->task->event_ctx);
if (!c) return NULL;
s = talloc_zero(c, struct wb_sam_logon_state);
if (composite_nomem(s, c)) return c;
s->ctx = c;
s->req = req;
c->private_data = s;
creq = wb_sid2domain_send(s, service, service->primary_sid);
composite_continue(c, creq, wb_sam_logon_recv_domain, s);
return c;
}
/*
Having finished making the connection to the DC
Send of a SamLogon request to authenticate a user.
*/
static void wb_sam_logon_recv_domain(struct composite_context *creq)
{
struct wb_sam_logon_state *s = talloc_get_type(creq->async.private_data,
struct wb_sam_logon_state);
struct wbsrv_domain *domain;
struct tevent_req *subreq;
s->ctx->status = wb_sid2domain_recv(creq, &domain);
if (!composite_is_ok(s->ctx)) return;
s->creds_state = cli_credentials_get_netlogon_creds(domain->libnet_ctx->cred);
netlogon_creds_client_authenticator(s->creds_state, &s->auth1);
s->r.in.server_name = talloc_asprintf(s, "\\\\%s",
dcerpc_server_name(domain->netlogon_pipe));
if (composite_nomem(s->r.in.server_name, s->ctx)) return;
s->r.in.computer_name = cli_credentials_get_workstation(domain->libnet_ctx->cred);
s->r.in.credential = &s->auth1;
s->r.in.return_authenticator = &s->auth2;
s->r.in.logon_level = s->req->in.logon_level;
s->r.in.logon = &s->req->in.logon;
s->r.in.validation_level = s->req->in.validation_level;
s->r.out.return_authenticator = NULL;
s->r.out.validation = talloc(s, union netr_Validation);
if (composite_nomem(s->r.out.validation, s->ctx)) return;
s->r.out.authoritative = talloc(s, uint8_t);
if (composite_nomem(s->r.out.authoritative, s->ctx)) return;
/*
* use a new talloc context for the LogonSamLogon call
* because then we can just to a talloc_steal on this context
* in the final _recv() function to give the caller all the content of
* the s->r.out.validation
*/
s->r_mem_ctx = talloc_new(s);
if (composite_nomem(s->r_mem_ctx, s->ctx)) return;
subreq = dcerpc_netr_LogonSamLogon_r_send(s,
s->ctx->event_ctx,
domain->netlogon_pipe->binding_handle,
&s->r);
if (composite_nomem(subreq, s->ctx)) return;
tevent_req_set_callback(subreq, wb_sam_logon_recv_samlogon, s);
}
/*
NTLM Authentication
Check the SamLogon reply and decrypt the session keys
*/
static void wb_sam_logon_recv_samlogon(struct tevent_req *subreq)
{
struct wb_sam_logon_state *s = tevent_req_callback_data(subreq,
struct wb_sam_logon_state);
s->ctx->status = dcerpc_netr_LogonSamLogon_r_recv(subreq, s->r_mem_ctx);
TALLOC_FREE(subreq);
if (!composite_is_ok(s->ctx)) return;
s->ctx->status = s->r.out.result;
if (!composite_is_ok(s->ctx)) return;
if ((s->r.out.return_authenticator == NULL) ||
(!netlogon_creds_client_check(s->creds_state,
&s->r.out.return_authenticator->cred))) {
DEBUG(0, ("Credentials check failed!\n"));
composite_error(s->ctx, NT_STATUS_ACCESS_DENIED);
return;
}
/* Decrypt the session keys before we reform the info3, so the
* person on the other end of winbindd pipe doesn't have to.
* They won't have the encryption key anyway */
netlogon_creds_decrypt_samlogon(s->creds_state,
s->r.in.validation_level,
s->r.out.validation);
composite_done(s->ctx);
}
NTSTATUS wb_sam_logon_recv(struct composite_context *c,
TALLOC_CTX *mem_ctx,
struct winbind_SamLogon *req)
{
struct wb_sam_logon_state *s = talloc_get_type(c->private_data,
struct wb_sam_logon_state);
NTSTATUS status = composite_wait(c);
if (NT_STATUS_IS_OK(status)) {
talloc_steal(mem_ctx, s->r_mem_ctx);
req->out.validation = *s->r.out.validation;
req->out.authoritative = 1;
}
talloc_free(s);
return status;
}
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