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/*
Unix SMB/CIFS implementation.
POSIX NTVFS backend - ACL support
Copyright (C) Andrew Tridgell 2004
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 "system/filesys.h"
#include "vfs_posix.h"
#include "librpc/gen_ndr/ndr_xattr.h"
/*
setup a default ACL for a file
*/
static NTSTATUS pvfs_default_acl(struct pvfs_state *pvfs,
struct smbsrv_request *req,
struct pvfs_filename *name, int fd,
struct xattr_NTACL *acl)
{
struct security_descriptor *sd;
struct nt_user_token *token = req->session->session_info->nt_user_token;
int i;
sd = security_descriptor_initialise(req);
if (sd == NULL) {
return NT_STATUS_NO_MEMORY;
}
/* nasty hack to get a reasonable sec desc - should be based on posix uid/gid
and perms */
if (token->num_sids > 0) {
sd->owner_sid = token->user_sids[0];
}
if (token->num_sids > 1) {
sd->group_sid = token->user_sids[1];
}
for (i=0;i<token->num_sids;i++) {
struct security_ace ace;
NTSTATUS status;
ace.type = SEC_ACE_TYPE_ACCESS_ALLOWED;
ace.flags = 0;
ace.access_mask = SEC_RIGHTS_FULL_CTRL | STD_RIGHT_ALL_ACCESS;
ace.trustee = *token->user_sids[i];
status = security_descriptor_dacl_add(sd, &ace);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
}
acl->version = 1;
acl->info.sd = sd;
return NT_STATUS_OK;
}
/*
omit any security_descriptor elements not specified in the given
secinfo flags
*/
static void normalise_sd_flags(struct security_descriptor *sd, uint32_t secinfo_flags)
{
if (!(secinfo_flags & OWNER_SECURITY_INFORMATION)) {
sd->owner_sid = NULL;
}
if (!(secinfo_flags & GROUP_SECURITY_INFORMATION)) {
sd->group_sid = NULL;
}
if (!(secinfo_flags & DACL_SECURITY_INFORMATION)) {
sd->dacl = NULL;
}
if (!(secinfo_flags & SACL_SECURITY_INFORMATION)) {
sd->sacl = NULL;
}
}
/*
answer a setfileinfo for an ACL
*/
NTSTATUS pvfs_acl_set(struct pvfs_state *pvfs,
struct smbsrv_request *req,
struct pvfs_filename *name, int fd,
union smb_setfileinfo *info)
{
struct xattr_NTACL *acl;
uint32_t secinfo_flags = info->set_secdesc.in.secinfo_flags;
struct security_descriptor *new_sd, *sd;
NTSTATUS status;
acl = talloc_p(req, struct xattr_NTACL);
if (acl == NULL) {
return NT_STATUS_NO_MEMORY;
}
status = pvfs_acl_load(pvfs, name, fd, acl);
if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
status = pvfs_default_acl(pvfs, req, name, fd, acl);
}
if (!NT_STATUS_IS_OK(status)) {
return status;
}
switch (acl->version) {
case 1:
sd = acl->info.sd;
break;
default:
return NT_STATUS_INVALID_LEVEL;
}
new_sd = info->set_secdesc.in.sd;
/* only set the elements that have been specified */
if (secinfo_flags & OWNER_SECURITY_INFORMATION) {
sd->owner_sid = new_sd->owner_sid;
}
if (secinfo_flags & GROUP_SECURITY_INFORMATION) {
sd->group_sid = new_sd->group_sid;
}
if (secinfo_flags & DACL_SECURITY_INFORMATION) {
sd->dacl = new_sd->dacl;
}
if (secinfo_flags & SACL_SECURITY_INFORMATION) {
sd->sacl = new_sd->sacl;
}
status = pvfs_acl_save(pvfs, name, fd, acl);
return status;
}
/*
answer a fileinfo query for the ACL
*/
NTSTATUS pvfs_acl_query(struct pvfs_state *pvfs,
struct smbsrv_request *req,
struct pvfs_filename *name, int fd,
union smb_fileinfo *info)
{
struct xattr_NTACL *acl;
NTSTATUS status;
struct security_descriptor *sd;
acl = talloc_p(req, struct xattr_NTACL);
if (acl == NULL) {
return NT_STATUS_NO_MEMORY;
}
status = pvfs_acl_load(pvfs, name, fd, acl);
if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
status = pvfs_default_acl(pvfs, req, name, fd, acl);
}
if (!NT_STATUS_IS_OK(status)) {
return status;
}
switch (acl->version) {
case 1:
sd = acl->info.sd;
break;
default:
return NT_STATUS_INVALID_LEVEL;
}
normalise_sd_flags(sd, info->query_secdesc.in.secinfo_flags);
info->query_secdesc.out.sd = sd;
return NT_STATUS_OK;
}
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