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/*
Unix SMB/CIFS implementation.
FAKE FILE support, for faking up special files windows want access to
Copyright (C) Stefan (metze) Metzmacher 2003
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 "smbd/smbd.h"
#include "smbd/globals.h"
#include "fake_file.h"
#include "auth.h"
struct fake_file_type {
const char *name;
enum FAKE_FILE_TYPE type;
void *(*init_pd)(TALLOC_CTX *mem_ctx);
};
static const struct fake_file_type fake_files[] = {
#ifdef WITH_QUOTAS
{FAKE_FILE_NAME_QUOTA_UNIX, FAKE_FILE_TYPE_QUOTA, init_quota_handle},
#endif /* WITH_QUOTAS */
{NULL, FAKE_FILE_TYPE_NONE, NULL}
};
/****************************************************************************
Create a fake file handle
****************************************************************************/
static struct fake_file_handle *init_fake_file_handle(enum FAKE_FILE_TYPE type)
{
struct fake_file_handle *fh = NULL;
int i;
for (i=0; fake_files[i].name!=NULL; i++) {
if (fake_files[i].type==type) {
break;
}
}
if (fake_files[i].name == NULL) {
return NULL;
}
DEBUG(5,("init_fake_file_handle: for [%s]\n",fake_files[i].name));
fh = talloc(NULL, struct fake_file_handle);
if (fh == NULL) {
DEBUG(0,("TALLOC_ZERO() failed.\n"));
return NULL;
}
fh->type = type;
if (fake_files[i].init_pd) {
fh->private_data = fake_files[i].init_pd(fh);
}
return fh;
}
/****************************************************************************
Does this name match a fake filename ?
****************************************************************************/
enum FAKE_FILE_TYPE is_fake_file_path(const char *path)
{
int i;
if (!path) {
return FAKE_FILE_TYPE_NONE;
}
for (i=0;fake_files[i].name!=NULL;i++) {
if (strncmp(path,fake_files[i].name,strlen(fake_files[i].name))==0) {
DEBUG(5,("is_fake_file: [%s] is a fake file\n",path));
return fake_files[i].type;
}
}
return FAKE_FILE_TYPE_NONE;
}
enum FAKE_FILE_TYPE is_fake_file(const struct smb_filename *smb_fname)
{
char *fname = NULL;
NTSTATUS status;
enum FAKE_FILE_TYPE ret;
if (!smb_fname) {
return FAKE_FILE_TYPE_NONE;
}
status = get_full_smb_filename(talloc_tos(), smb_fname, &fname);
if (!NT_STATUS_IS_OK(status)) {
return FAKE_FILE_TYPE_NONE;
}
ret = is_fake_file_path(fname);
TALLOC_FREE(fname);
return ret;
}
uint32_t dosmode_from_fake_filehandle(const struct fake_file_handle *ffh)
{
if (ffh->type != FAKE_FILE_TYPE_QUOTA) {
DBG_ERR("Unexpected fake_file_handle: %d\n", ffh->type);
log_stack_trace();
return FILE_ATTRIBUTE_NORMAL;
}
/* This is what Windows 2016 returns */
return FILE_ATTRIBUTE_HIDDEN
| FILE_ATTRIBUTE_SYSTEM
| FILE_ATTRIBUTE_DIRECTORY
| FILE_ATTRIBUTE_ARCHIVE;
}
/****************************************************************************
Open a fake quota file with a share mode.
****************************************************************************/
NTSTATUS open_fake_file(struct smb_request *req, connection_struct *conn,
uint64_t current_vuid,
enum FAKE_FILE_TYPE fake_file_type,
const struct smb_filename *smb_fname,
uint32_t access_mask,
files_struct **result)
{
const struct loadparm_substitution *lp_sub =
loadparm_s3_global_substitution();
files_struct *fsp = NULL;
NTSTATUS status;
/* access check */
if (geteuid() != sec_initial_uid()) {
DBG_NOTICE("access_denied to service[%s] file[%s] user[%s]\n",
lp_servicename(talloc_tos(), lp_sub, SNUM(conn)),
smb_fname_str_dbg(smb_fname),
conn->session_info->unix_info->unix_name);
return NT_STATUS_ACCESS_DENIED;
}
status = file_new(req, conn, &fsp);
if(!NT_STATUS_IS_OK(status)) {
return status;
}
DBG_INFO("fname = %s, %s, access_mask = 0x%"PRIx32"\n",
smb_fname_str_dbg(smb_fname),
fsp_fnum_dbg(fsp),
access_mask);
fsp->conn = conn;
fsp_set_fd(fsp, -1);
fsp->vuid = current_vuid;
fh_set_pos(fsp->fh, -1);
fsp->fsp_flags.can_lock = false; /* Should this be true ? - No, JRA */
fsp->access_mask = access_mask;
status = fsp_set_smb_fname(fsp, smb_fname);
if (!NT_STATUS_IS_OK(status)) {
file_free(req, fsp);
return NT_STATUS_NO_MEMORY;
}
fsp->fake_file_handle = init_fake_file_handle(fake_file_type);
if (fsp->fake_file_handle==NULL) {
file_free(req, fsp);
return NT_STATUS_NO_MEMORY;
}
status = smbd_calculate_access_mask_fsp(conn->cwd_fsp,
fsp,
false,
access_mask,
&access_mask);
if (!NT_STATUS_IS_OK(status)) {
DBG_DEBUG("smbd_calculate_access_mask_fsp "
"on service[%s] file[%s] returned %s\n",
lp_servicename(talloc_tos(), lp_sub, SNUM(conn)),
smb_fname_str_dbg(smb_fname),
nt_errstr(status));
file_free(req, fsp);
return status;
}
*result = fsp;
return NT_STATUS_OK;
}
NTSTATUS close_fake_file(struct smb_request *req, files_struct *fsp)
{
/*
* Nothing to do, fake files don't hold any resources
*/
return NT_STATUS_OK;
}
|
