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/*
Unix SMB/CIFS implementation.
routines for marshalling/unmarshalling security descriptors
and related structures
Copyright (C) Andrew Tridgell 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 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"
/*
parse a security_ace
*/
NTSTATUS ndr_pull_security_ace(struct ndr_pull *ndr, struct security_ace *ace)
{
uint16 size;
struct ndr_pull_save save;
ndr_pull_save(ndr, &save);
NDR_CHECK(ndr_pull_u8(ndr, &ace->type));
NDR_CHECK(ndr_pull_u8(ndr, &ace->flags));
NDR_CHECK(ndr_pull_u16(ndr, &size));
NDR_CHECK(ndr_pull_limit_size(ndr, size, 4));
NDR_CHECK(ndr_pull_u32(ndr, &ace->access_mask));
if (sec_ace_object(ace->type)) {
NDR_ALLOC(ndr, ace->obj);
NDR_CHECK(ndr_pull_u32(ndr, &ace->obj->flags));
if (ace->obj->flags & SEC_ACE_OBJECT_PRESENT) {
NDR_CHECK(ndr_pull_guid(ndr, &ace->obj->object_guid));
}
if (ace->obj->flags & SEC_ACE_OBJECT_INHERITED_PRESENT) {
NDR_CHECK(ndr_pull_guid(ndr, &ace->obj->inherit_guid));
}
}
NDR_CHECK(ndr_pull_dom_sid(ndr, &ace->trustee));
ndr_pull_restore(ndr, &save);
NDR_CHECK(ndr_pull_advance(ndr, size));
return NT_STATUS_OK;
}
/*
parse a security_acl
*/
NTSTATUS ndr_pull_security_acl(struct ndr_pull *ndr, struct security_acl *acl)
{
int i;
uint16 size;
struct ndr_pull_save save;
ndr_pull_save(ndr, &save);
NDR_CHECK(ndr_pull_u16(ndr, &acl->revision));
NDR_CHECK(ndr_pull_u16(ndr, &size));
NDR_CHECK(ndr_pull_limit_size(ndr, size, 4));
NDR_CHECK(ndr_pull_u32(ndr, &acl->num_aces));
NDR_ALLOC_N(ndr, acl->aces, acl->num_aces);
for (i=0;i<acl->num_aces;i++) {
NDR_CHECK(ndr_pull_security_ace(ndr, &acl->aces[i]));
}
ndr_pull_restore(ndr, &save);
NDR_CHECK(ndr_pull_advance(ndr, size));
return NT_STATUS_OK;
}
/*
parse a security_acl offset and structure
*/
NTSTATUS ndr_pull_security_acl_ofs(struct ndr_pull *ndr, struct security_acl **acl)
{
uint32 ofs;
struct ndr_pull_save save;
NDR_CHECK(ndr_pull_u32(ndr, &ofs));
if (ofs == 0) {
/* it is valid for an acl ptr to be NULL */
*acl = NULL;
return NT_STATUS_OK;
}
ndr_pull_save(ndr, &save);
NDR_CHECK(ndr_pull_set_offset(ndr, ofs));
NDR_ALLOC(ndr, *acl);
NDR_CHECK(ndr_pull_security_acl(ndr, *acl));
ndr_pull_restore(ndr, &save);
return NT_STATUS_OK;
}
/*
parse a dom_sid
*/
NTSTATUS ndr_pull_dom_sid(struct ndr_pull *ndr, struct dom_sid *sid)
{
int i;
NDR_CHECK(ndr_pull_u8(ndr, &sid->sid_rev_num));
NDR_CHECK(ndr_pull_u8(ndr, &sid->num_auths));
for (i=0;i<6;i++) {
NDR_CHECK(ndr_pull_u8(ndr, &sid->id_auth[i]));
}
NDR_ALLOC_N(ndr, sid->sub_auths, sid->num_auths);
for (i=0;i<sid->num_auths;i++) {
NDR_CHECK(ndr_pull_u32(ndr, &sid->sub_auths[i]));
}
return NT_STATUS_OK;
}
/*
parse a dom_sid2 - this is a dom_sid but with an extra copy of the num_auths field
*/
NTSTATUS ndr_pull_dom_sid2(struct ndr_pull *ndr, struct dom_sid *sid)
{
uint32 num_auths;
NDR_CHECK(ndr_pull_u32(ndr, &num_auths));
return ndr_pull_dom_sid(ndr, sid);
}
/*
parse a dom_sid offset and structure
*/
NTSTATUS ndr_pull_dom_sid_ofs(struct ndr_pull *ndr, struct dom_sid **sid)
{
uint32 ofs;
struct ndr_pull_save save;
NDR_CHECK(ndr_pull_u32(ndr, &ofs));
if (ofs == 0) {
/* it is valid for a dom_sid ptr to be NULL */
*sid = NULL;
return NT_STATUS_OK;
}
ndr_pull_save(ndr, &save);
NDR_CHECK(ndr_pull_set_offset(ndr, ofs));
NDR_ALLOC(ndr, *sid);
NDR_CHECK(ndr_pull_dom_sid(ndr, *sid));
ndr_pull_restore(ndr, &save);
return NT_STATUS_OK;
}
/*
parse a security descriptor
*/
NTSTATUS ndr_pull_security_descriptor(struct ndr_pull *ndr,
struct security_descriptor **sd)
{
NDR_ALLOC(ndr, *sd);
NDR_CHECK(ndr_pull_u8(ndr, &(*sd)->revision));
NDR_CHECK(ndr_pull_u16(ndr, &(*sd)->type));
NDR_CHECK(ndr_pull_dom_sid_ofs(ndr, &(*sd)->owner_sid));
NDR_CHECK(ndr_pull_dom_sid_ofs(ndr, &(*sd)->group_sid));
NDR_CHECK(ndr_pull_security_acl_ofs(ndr, &(*sd)->sacl));
NDR_CHECK(ndr_pull_security_acl_ofs(ndr, &(*sd)->dacl));
return NT_STATUS_OK;
}
/*
parse a security_ace
*/
NTSTATUS ndr_push_security_ace(struct ndr_push *ndr, struct security_ace *ace)
{
struct ndr_push_save save1, save2;
NDR_CHECK(ndr_push_u8(ndr, ace->type));
NDR_CHECK(ndr_push_u8(ndr, ace->flags));
ndr_push_save(ndr, &save1);
NDR_CHECK(ndr_push_u16(ndr, 0));
NDR_CHECK(ndr_push_u32(ndr, ace->access_mask));
if (sec_ace_object(ace->type)) {
NDR_CHECK(ndr_push_u32(ndr, ace->obj->flags));
if (ace->obj->flags & SEC_ACE_OBJECT_PRESENT) {
NDR_CHECK(ndr_push_guid(ndr, &ace->obj->object_guid));
}
if (ace->obj->flags & SEC_ACE_OBJECT_INHERITED_PRESENT) {
NDR_CHECK(ndr_push_guid(ndr, &ace->obj->inherit_guid));
}
}
NDR_CHECK(ndr_push_dom_sid(ndr, &ace->trustee));
ndr_push_save(ndr, &save2);
ndr_push_restore(ndr, &save1);
NDR_CHECK(ndr_push_u16(ndr, 2 + save2.offset - save1.offset));
ndr_push_restore(ndr, &save2);
return NT_STATUS_OK;
}
/*
push a security_acl
*/
NTSTATUS ndr_push_security_acl(struct ndr_push *ndr, struct security_acl *acl)
{
int i;
struct ndr_push_save save1, save2;
NDR_CHECK(ndr_push_u16(ndr, acl->revision));
ndr_push_save(ndr, &save1);
NDR_CHECK(ndr_push_u16(ndr, 0));
NDR_CHECK(ndr_push_u32(ndr, acl->num_aces));
for (i=0;i<acl->num_aces;i++) {
NDR_CHECK(ndr_push_security_ace(ndr, &acl->aces[i]));
}
ndr_push_save(ndr, &save2);
ndr_push_restore(ndr, &save1);
NDR_CHECK(ndr_push_u16(ndr, 2 + save2.offset - save1.offset));
ndr_push_restore(ndr, &save2);
return NT_STATUS_OK;
}
/*
push a dom_sid
*/
NTSTATUS ndr_push_dom_sid(struct ndr_push *ndr, struct dom_sid *sid)
{
int i;
NDR_CHECK(ndr_push_u8(ndr, sid->sid_rev_num));
NDR_CHECK(ndr_push_u8(ndr, sid->num_auths));
for (i=0;i<6;i++) {
NDR_CHECK(ndr_push_u8(ndr, sid->id_auth[i]));
}
for (i=0;i<sid->num_auths;i++) {
NDR_CHECK(ndr_push_u32(ndr, sid->sub_auths[i]));
}
return NT_STATUS_OK;
}
/*
generate a ndr security descriptor
*/
NTSTATUS ndr_push_security_descriptor(struct ndr_push *ndr,
struct security_descriptor *sd)
{
struct ndr_push_save save;
struct ndr_push_save ofs1, ofs2, ofs3, ofs4;
ndr_push_save(ndr, &save);
NDR_CHECK(ndr_push_u8(ndr, sd->revision));
NDR_CHECK(ndr_push_u16(ndr, sd->type));
NDR_CHECK(ndr_push_offset(ndr, &ofs1));
NDR_CHECK(ndr_push_offset(ndr, &ofs2));
NDR_CHECK(ndr_push_offset(ndr, &ofs3));
NDR_CHECK(ndr_push_offset(ndr, &ofs4));
if (sd->owner_sid) {
NDR_CHECK(ndr_push_offset_ptr(ndr, &ofs1, &save));
NDR_CHECK(ndr_push_dom_sid(ndr, sd->owner_sid));
}
if (sd->group_sid) {
NDR_CHECK(ndr_push_offset_ptr(ndr, &ofs2, &save));
NDR_CHECK(ndr_push_dom_sid(ndr, sd->group_sid));
}
if (sd->sacl) {
NDR_CHECK(ndr_push_offset_ptr(ndr, &ofs3, &save));
NDR_CHECK(ndr_push_security_acl(ndr, sd->sacl));
}
if (sd->dacl) {
NDR_CHECK(ndr_push_offset_ptr(ndr, &ofs4, &save));
NDR_CHECK(ndr_push_security_acl(ndr, sd->dacl));
}
return NT_STATUS_OK;
}
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