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/*
Unix SMB/CIFS implementation.
fast routines for getting the wire size of security objects
Copyright (C) Andrew Tridgell 2003
Copyright (C) Stefan Metzmacher 2006-2008
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 "librpc/gen_ndr/ndr_security.h"
/*
return the wire size of a security_ace
*/
size_t ndr_size_security_ace(const struct security_ace *ace, int flags)
{
size_t ret;
if (!ace) return 0;
ret = 8 + ndr_size_dom_sid(&ace->trustee, flags);
switch (ace->type) {
case SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
case SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
case SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT:
case SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT:
ret += 4; /* uint32 bitmap ace->object.object.flags */
if (ace->object.object.flags & SEC_ACE_OBJECT_TYPE_PRESENT) {
ret += 16; /* GUID ace->object.object.type.type */
}
if (ace->object.object.flags & SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT) {
ret += 16; /* GUID ace->object.object.inherited_typeinherited_type */
}
break;
default:
break;
}
return ret;
}
enum ndr_err_code ndr_pull_security_ace(struct ndr_pull *ndr, int ndr_flags, struct security_ace *r)
{
if (ndr_flags & NDR_SCALARS) {
uint32_t start_ofs = ndr->offset;
uint32_t size = 0;
uint32_t pad = 0;
NDR_CHECK(ndr_pull_align(ndr, 4));
NDR_CHECK(ndr_pull_security_ace_type(ndr, NDR_SCALARS, &r->type));
NDR_CHECK(ndr_pull_security_ace_flags(ndr, NDR_SCALARS, &r->flags));
NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &r->size));
NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &r->access_mask));
NDR_CHECK(ndr_pull_set_switch_value(ndr, &r->object, r->type));
NDR_CHECK(ndr_pull_security_ace_object_ctr(ndr, NDR_SCALARS, &r->object));
NDR_CHECK(ndr_pull_dom_sid(ndr, NDR_SCALARS, &r->trustee));
size = ndr->offset - start_ofs;
if (r->size < size) {
return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
"ndr_pull_security_ace: r->size %u < size %u",
(unsigned)r->size, size);
}
pad = r->size - size;
NDR_PULL_NEED_BYTES(ndr, pad);
ndr->offset += pad;
}
if (ndr_flags & NDR_BUFFERS) {
NDR_CHECK(ndr_pull_security_ace_object_ctr(ndr, NDR_BUFFERS, &r->object));
}
return NDR_ERR_SUCCESS;
}
/*
return the wire size of a security_acl
*/
size_t ndr_size_security_acl(const struct security_acl *acl, int flags)
{
size_t ret;
int i;
if (!acl) return 0;
ret = 8;
for (i=0;i<acl->num_aces;i++) {
ret += ndr_size_security_ace(&acl->aces[i], flags);
}
return ret;
}
/*
return the wire size of a security descriptor
*/
size_t ndr_size_security_descriptor(const struct security_descriptor *sd, int flags)
{
size_t ret;
if (!sd) return 0;
ret = 20;
ret += ndr_size_dom_sid(sd->owner_sid, flags);
ret += ndr_size_dom_sid(sd->group_sid, flags);
ret += ndr_size_security_acl(sd->dacl, flags);
ret += ndr_size_security_acl(sd->sacl, flags);
return ret;
}
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