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/*
Unix SMB/CIFS implementation.
Pipe SMB reply routines
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Luke Kenneth Casson Leighton 1996-1998
Copyright (C) Paul Ashton 1997-1998.
Copyright (C) Jeremy Allison 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 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/>.
*/
/*
This file handles reply_ calls on named pipes that the server
makes to handle specific protocols
*/
#include "includes.h"
#include "smbd/smbd.h"
#include "smbd/globals.h"
#include "libcli/security/security.h"
#include "rpc_server/srv_pipe_hnd.h"
#include "auth/auth_util.h"
#include "librpc/rpc/dcerpc_helper.h"
NTSTATUS open_np_file(struct smb_request *smb_req, const char *name,
struct files_struct **pfsp)
{
struct smbXsrv_connection *xconn = smb_req->xconn;
struct connection_struct *conn = smb_req->conn;
struct files_struct *fsp;
struct smb_filename *smb_fname = NULL;
struct auth_session_info *session_info = conn->session_info;
NTSTATUS status;
status = file_new(smb_req, conn, &fsp);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("file_new failed: %s\n", nt_errstr(status)));
return status;
}
fsp->conn = conn;
fsp_set_fd(fsp, -1);
fsp->vuid = smb_req->vuid;
fsp->fsp_flags.can_lock = false;
fsp->access_mask = FILE_READ_DATA | FILE_WRITE_DATA;
smb_fname = synthetic_smb_fname(talloc_tos(),
name,
NULL,
NULL,
0,
0);
if (smb_fname == NULL) {
file_free(smb_req, fsp);
return NT_STATUS_NO_MEMORY;
}
status = fsp_set_smb_fname(fsp, smb_fname);
TALLOC_FREE(smb_fname);
if (!NT_STATUS_IS_OK(status)) {
file_free(smb_req, fsp);
return status;
}
if (smb_req->smb2req != NULL && smb_req->smb2req->was_encrypted) {
struct security_token *security_token = NULL;
uint16_t dialect = xconn->smb2.server.dialect;
uint16_t srv_smb_encrypt = DCERPC_SMB_ENCRYPTION_REQUIRED;
uint16_t cipher = xconn->smb2.server.cipher;
struct dom_sid smb3_sid = global_sid_Samba_SMB3;
size_t num_smb3_sids;
bool ok;
session_info = copy_session_info(fsp, conn->session_info);
if (session_info == NULL) {
DBG_ERR("Failed to copy session info\n");
file_free(smb_req, fsp);
return NT_STATUS_NO_MEMORY;
}
security_token = session_info->security_token;
/*
* Security check:
*
* Make sure we don't have a SMB3 SID in the security token!
*/
num_smb3_sids = security_token_count_flag_sids(security_token,
&smb3_sid,
3,
NULL);
if (num_smb3_sids != 0) {
DBG_ERR("ERROR: %zu SMB3 SIDs have already been "
"detected in the security token!\n",
num_smb3_sids);
file_free(smb_req, fsp);
return NT_STATUS_ACCESS_DENIED;
}
ok = sid_append_rid(&smb3_sid, dialect);
ok &= sid_append_rid(&smb3_sid, srv_smb_encrypt);
ok &= sid_append_rid(&smb3_sid, cipher);
if (!ok) {
DBG_ERR("sid too small\n");
file_free(smb_req, fsp);
return NT_STATUS_BUFFER_TOO_SMALL;
}
status = add_sid_to_array_unique(security_token,
&smb3_sid,
&security_token->sids,
&security_token->num_sids);
if (!NT_STATUS_IS_OK(status)) {
DBG_ERR("Failed to add SMB3 SID to security token\n");
file_free(smb_req, fsp);
return status;
}
fsp->fsp_flags.encryption_required = true;
}
status = np_open(fsp, name,
conn->sconn->remote_address,
conn->sconn->local_address,
session_info,
conn->sconn->ev_ctx,
conn->sconn->msg_ctx,
conn->sconn->dce_ctx,
&fsp->fake_file_handle);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("np_open(%s) returned %s\n", name,
nt_errstr(status)));
file_free(smb_req, fsp);
return status;
}
*pfsp = fsp;
return NT_STATUS_OK;
}
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