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/*
Unix SMB2 implementation.
Copyright (C) Andrew Bartlett 2001-2005
Copyright (C) Stefan Metzmacher 2005
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "auth/auth.h"
#include "libcli/smb2/smb2.h"
#include "libcli/smb2/smb2_calls.h"
#include "smb_server/smb_server.h"
#include "smb_server/smb2/smb2_server.h"
#include "smbd/service_stream.h"
struct smb2srv_session {
struct smb2srv_session *prev,*next;
uint64_t uid;
struct gensec_security *gensec_ctx;
struct auth_session_info *session_info;
};
static NTSTATUS smb2srv_sesssetup_backend(struct smb2srv_request *req, struct smb2_session_setup *io)
{
NTSTATUS status = NT_STATUS_ACCESS_DENIED;
struct smbsrv_session *smb_sess = NULL;
struct auth_session_info *session_info = NULL;
uint64_t vuid;
io->out._pad = 0;
io->out.uid = 0;
io->out.secblob = data_blob(NULL, 0);
vuid = BVAL(req->in.hdr, SMB2_HDR_UID);
/* TODO: we're stricter than the SMB version till we have
* SMB2-CONTEXT test
*/
if (vuid == 0) {
struct gensec_security *gensec_ctx;
status = gensec_server_start(req, &gensec_ctx,
req->smb_conn->connection->event.ctx);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to start GENSEC server code: %s\n", nt_errstr(status)));
return status;
}
gensec_set_credentials(gensec_ctx, req->smb_conn->negotiate.server_credentials);
gensec_set_target_service(gensec_ctx, "cifs");
gensec_want_feature(gensec_ctx, GENSEC_FEATURE_SESSION_KEY);
status = gensec_start_mech_by_oid(gensec_ctx, GENSEC_OID_SPNEGO);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to start GENSEC SPNEGO server code: %s\n", nt_errstr(status)));
return status;
}
/* allocate a new session */
smb_sess = smbsrv_session_new(req->smb_conn, gensec_ctx);
} else {
/* lookup an existing session */
smb_sess = smbsrv_session_find_sesssetup(req->smb_conn, vuid);
}
if (!smb_sess) {
return NT_STATUS_ACCESS_DENIED;
}
if (!smb_sess->gensec_ctx) {
status = NT_STATUS_INTERNAL_ERROR;
DEBUG(1, ("Internal ERROR: no gensec_ctx on session: %s\n", nt_errstr(status)));
goto failed;
}
status = gensec_update(smb_sess->gensec_ctx, req, io->in.secblob, &io->out.secblob);
if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
io->out.uid = smb_sess->vuid;
return status;
} else if (!NT_STATUS_IS_OK(status)) {
goto failed;
}
status = gensec_session_info(smb_sess->gensec_ctx, &session_info);
if (!NT_STATUS_IS_OK(status)) {
goto failed;
}
/* Ensure this is marked as a 'real' vuid, not one
* simply valid for the session setup leg */
status = smbsrv_session_sesssetup_finished(smb_sess, session_info);
if (!NT_STATUS_IS_OK(status)) {
goto failed;
}
req->session = smb_sess;
io->out.uid = smb_sess->vuid;
return status;
failed:
talloc_free(smb_sess);
return auth_nt_status_squash(status);
}
static void smb2srv_sesssetup_send(struct smb2srv_request *req, struct smb2_session_setup *io)
{
NTSTATUS status;
if (NT_STATUS_IS_ERR(req->status) && !NT_STATUS_EQUAL(req->status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
smb2srv_send_error(req, req->status);
return;
}
status = smb2srv_setup_reply(req, 0x08, io->out.secblob.length);
if (!NT_STATUS_IS_OK(status)) {
smbsrv_terminate_connection(req->smb_conn, nt_errstr(status));
talloc_free(req);
return;
}
SIVAL(req->out.hdr, SMB2_HDR_STATUS, NT_STATUS_V(req->status));
SBVAL(req->out.hdr, SMB2_HDR_UID, io->out.uid);
SSVAL(req->out.body, 0x02, io->out._pad);
status = smb2_push_o16s16_blob(&req->out, 0x04, io->out.secblob);
if (!NT_STATUS_IS_OK(status)) {
smbsrv_terminate_connection(req->smb_conn, nt_errstr(status));
talloc_free(req);
return;
}
smb2srv_send_reply(req);
}
void smb2srv_sesssetup_recv(struct smb2srv_request *req)
{
struct smb2_session_setup *io;
NTSTATUS status;
if (req->in.body_size < 0x10) {
smb2srv_send_error(req, NT_STATUS_FOOBAR);
return;
}
io = talloc(req, struct smb2_session_setup);
if (!io) {
smbsrv_terminate_connection(req->smb_conn, nt_errstr(NT_STATUS_NO_MEMORY));
talloc_free(req);
return;
}
io->in._pad = SVAL(req->in.body, 0x02);
io->in.unknown2 = IVAL(req->in.body, 0x04);
io->in.unknown3 = IVAL(req->in.body, 0x08);
status = smb2_pull_o16s16_blob(&req->in, io, req->in.body+0x0C, &io->in.secblob);
if (!NT_STATUS_IS_OK(status)) {
smbsrv_terminate_connection(req->smb_conn, nt_errstr(status));
talloc_free(req);
return;
}
req->status = smb2srv_sesssetup_backend(req, io);
if (req->control_flags & SMB2SRV_REQ_CTRL_FLAG_NOT_REPLY) {
talloc_free(req);
return;
}
smb2srv_sesssetup_send(req, io);
}
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