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samba-mirror/source3/rpc_parse/parse_sec.c
Volker Lendecke 7cbdb48475 Remove tiny code duplication
ndr_size_security_descriptor does the same as sec_desc_size
(This used to be commit bc3bd7a8e7)
2007-12-29 23:13:26 +01:00

453 lines
11 KiB
C

/*
* Unix SMB/Netbios implementation.
* Version 1.9.
* RPC Pipe client / server routines
* Copyright (C) Andrew Tridgell 1992-1998,
* Copyright (C) Jeremy R. Allison 1995-2005.
* Copyright (C) Luke Kenneth Casson Leighton 1996-1998,
* Copyright (C) Paul Ashton 1997-1998.
*
* 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"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_PARSE
/*******************************************************************
Reads or writes a SEC_ACCESS structure.
********************************************************************/
bool sec_io_access(const char *desc, SEC_ACCESS *t, prs_struct *ps, int depth)
{
if (t == NULL)
return False;
prs_debug(ps, depth, desc, "sec_io_access");
depth++;
if(!prs_uint32("mask", ps, depth, t))
return False;
return True;
}
/*******************************************************************
Reads or writes a SEC_ACE structure.
********************************************************************/
bool sec_io_ace(const char *desc, SEC_ACE *psa, prs_struct *ps, int depth)
{
uint32 old_offset;
uint32 offset_ace_size;
uint8 type;
if (psa == NULL)
return False;
prs_debug(ps, depth, desc, "sec_io_ace");
depth++;
old_offset = prs_offset(ps);
if (MARSHALLING(ps)) {
type = (uint8)psa->type;
}
if(!prs_uint8("type ", ps, depth, &type))
return False;
if (UNMARSHALLING(ps)) {
psa->type = (enum security_ace_type)type;
}
if(!prs_uint8("flags", ps, depth, &psa->flags))
return False;
if(!prs_uint16_pre("size ", ps, depth, &psa->size, &offset_ace_size))
return False;
if(!prs_uint32("access_mask", ps, depth, &psa->access_mask))
return False;
/* check whether object access is present */
if (!sec_ace_object(psa->type)) {
if (!smb_io_dom_sid("trustee ", &psa->trustee , ps, depth))
return False;
} else {
if (!prs_uint32("obj_flags", ps, depth, &psa->object.object.flags))
return False;
if (psa->object.object.flags & SEC_ACE_OBJECT_PRESENT)
if (!smb_io_uuid("obj_guid", &psa->object.object.type.type, ps,depth))
return False;
if (psa->object.object.flags & SEC_ACE_OBJECT_INHERITED_PRESENT)
if (!smb_io_uuid("inh_guid", &psa->object.object.inherited_type.inherited_type, ps,depth))
return False;
if(!smb_io_dom_sid("trustee ", &psa->trustee , ps, depth))
return False;
}
/* Theorectically an ACE can have a size greater than the
sum of its components. When marshalling, pad with extra null bytes up to the
correct size. */
if (MARSHALLING(ps) && (psa->size > prs_offset(ps) - old_offset)) {
uint32 extra_len = psa->size - (prs_offset(ps) - old_offset);
uint32 i;
uint8 c = 0;
for (i = 0; i < extra_len; i++) {
if (!prs_uint8("ace extra space", ps, depth, &c))
return False;
}
}
if(!prs_uint16_post("size ", ps, depth, &psa->size, offset_ace_size, old_offset))
return False;
return True;
}
/*******************************************************************
Reads or writes a SEC_ACL structure.
First of the xx_io_xx functions that allocates its data structures
for you as it reads them.
********************************************************************/
bool sec_io_acl(const char *desc, SEC_ACL **ppsa, prs_struct *ps, int depth)
{
unsigned int i;
uint32 old_offset;
uint32 offset_acl_size;
SEC_ACL *psa;
uint16 revision;
/*
* Note that the size is always a multiple of 4 bytes due to the
* nature of the data structure. Therefore the prs_align() calls
* have been removed as they through us off when doing two-layer
* marshalling such as in the printing code (RPC_BUFFER). --jerry
*/
if (ppsa == NULL)
return False;
psa = *ppsa;
if(UNMARSHALLING(ps) && psa == NULL) {
/*
* This is a read and we must allocate the stuct to read into.
*/
if((psa = PRS_ALLOC_MEM(ps, SEC_ACL, 1)) == NULL)
return False;
*ppsa = psa;
}
prs_debug(ps, depth, desc, "sec_io_acl");
depth++;
old_offset = prs_offset(ps);
if (MARSHALLING(ps)) {
revision = (uint16)psa->revision;
}
if(!prs_uint16("revision", ps, depth, &revision))
return False;
if (UNMARSHALLING(ps)) {
psa->revision = (enum security_acl_revision)revision;
}
if(!prs_uint16_pre("size ", ps, depth, &psa->size, &offset_acl_size))
return False;
if(!prs_uint32("num_aces ", ps, depth, &psa->num_aces))
return False;
if (UNMARSHALLING(ps)) {
if (psa->num_aces) {
if((psa->aces = PRS_ALLOC_MEM(ps, SEC_ACE, psa->num_aces)) == NULL)
return False;
} else {
psa->aces = NULL;
}
}
for (i = 0; i < psa->num_aces; i++) {
fstring tmp;
slprintf(tmp, sizeof(tmp)-1, "ace_list[%02d]: ", i);
if(!sec_io_ace(tmp, &psa->aces[i], ps, depth))
return False;
}
/* Theorectically an ACL can have a size greater than the
sum of its components. When marshalling, pad with extra null bytes up to the
correct size. */
if (MARSHALLING(ps) && (psa->size > prs_offset(ps) - old_offset)) {
uint32 extra_len = psa->size - (prs_offset(ps) - old_offset);
uint8 c = 0;
for (i = 0; i < extra_len; i++) {
if (!prs_uint8("acl extra space", ps, depth, &c))
return False;
}
}
if(!prs_uint16_post("size ", ps, depth, &psa->size, offset_acl_size, old_offset))
return False;
return True;
}
/*******************************************************************
Reads or writes a SEC_DESC structure.
If reading and the *ppsd = NULL, allocates the structure.
********************************************************************/
bool sec_io_desc(const char *desc, SEC_DESC **ppsd, prs_struct *ps, int depth)
{
uint32 old_offset;
uint32 max_offset = 0; /* after we're done, move offset to end */
uint32 tmp_offset = 0;
uint32 off_sacl, off_dacl, off_owner_sid, off_grp_sid;
uint16 revision;
SEC_DESC *psd;
if (ppsd == NULL)
return False;
psd = *ppsd;
if (psd == NULL) {
if(UNMARSHALLING(ps)) {
if((psd = PRS_ALLOC_MEM(ps,SEC_DESC,1)) == NULL)
return False;
*ppsd = psd;
} else {
/* Marshalling - just ignore. */
return True;
}
}
prs_debug(ps, depth, desc, "sec_io_desc");
depth++;
/* start of security descriptor stored for back-calc offset purposes */
old_offset = prs_offset(ps);
if (MARSHALLING(ps)) {
revision = (uint16)psd->revision;
}
if(!prs_uint16("revision", ps, depth, &revision))
return False;
if (UNMARSHALLING(ps)) {
psd->revision = (enum security_descriptor_revision)revision;
}
if(!prs_uint16("type ", ps, depth, &psd->type))
return False;
if (MARSHALLING(ps)) {
uint32 offset = SEC_DESC_HEADER_SIZE;
/*
* Work out the offsets here, as we write it out.
*/
if (psd->sacl != NULL) {
off_sacl = offset;
offset += psd->sacl->size;
} else {
off_sacl = 0;
}
if (psd->dacl != NULL) {
off_dacl = offset;
offset += psd->dacl->size;
} else {
off_dacl = 0;
}
if (psd->owner_sid != NULL) {
off_owner_sid = offset;
offset += ndr_size_dom_sid(psd->owner_sid, 0);
} else {
off_owner_sid = 0;
}
if (psd->group_sid != NULL) {
off_grp_sid = offset;
offset += ndr_size_dom_sid(psd->group_sid, 0);
} else {
off_grp_sid = 0;
}
}
if(!prs_uint32("off_owner_sid", ps, depth, &off_owner_sid))
return False;
if(!prs_uint32("off_grp_sid ", ps, depth, &off_grp_sid))
return False;
if(!prs_uint32("off_sacl ", ps, depth, &off_sacl))
return False;
if(!prs_uint32("off_dacl ", ps, depth, &off_dacl))
return False;
max_offset = MAX(max_offset, prs_offset(ps));
if (off_owner_sid != 0) {
tmp_offset = prs_offset(ps);
if(!prs_set_offset(ps, old_offset + off_owner_sid))
return False;
if (UNMARSHALLING(ps)) {
/* reading */
if((psd->owner_sid = PRS_ALLOC_MEM(ps,DOM_SID,1)) == NULL)
return False;
}
if(!smb_io_dom_sid("owner_sid ", psd->owner_sid , ps, depth))
return False;
max_offset = MAX(max_offset, prs_offset(ps));
if (!prs_set_offset(ps,tmp_offset))
return False;
}
if (psd->group_sid != 0) {
tmp_offset = prs_offset(ps);
if(!prs_set_offset(ps, old_offset + off_grp_sid))
return False;
if (UNMARSHALLING(ps)) {
/* reading */
if((psd->group_sid = PRS_ALLOC_MEM(ps,DOM_SID,1)) == NULL)
return False;
}
if(!smb_io_dom_sid("grp_sid", psd->group_sid, ps, depth))
return False;
max_offset = MAX(max_offset, prs_offset(ps));
if (!prs_set_offset(ps,tmp_offset))
return False;
}
if ((psd->type & SEC_DESC_SACL_PRESENT) && off_sacl) {
tmp_offset = prs_offset(ps);
if(!prs_set_offset(ps, old_offset + off_sacl))
return False;
if(!sec_io_acl("sacl", &psd->sacl, ps, depth))
return False;
max_offset = MAX(max_offset, prs_offset(ps));
if (!prs_set_offset(ps,tmp_offset))
return False;
}
if ((psd->type & SEC_DESC_DACL_PRESENT) && off_dacl != 0) {
tmp_offset = prs_offset(ps);
if(!prs_set_offset(ps, old_offset + off_dacl))
return False;
if(!sec_io_acl("dacl", &psd->dacl, ps, depth))
return False;
max_offset = MAX(max_offset, prs_offset(ps));
if (!prs_set_offset(ps,tmp_offset))
return False;
}
if(!prs_set_offset(ps, max_offset))
return False;
return True;
}
/*******************************************************************
Reads or writes a SEC_DESC_BUF structure.
********************************************************************/
bool sec_io_desc_buf(const char *desc, SEC_DESC_BUF **ppsdb, prs_struct *ps, int depth)
{
uint32 off_len;
uint32 off_max_len;
uint32 old_offset;
uint32 size;
uint32 len;
SEC_DESC_BUF *psdb;
uint32 ptr;
if (ppsdb == NULL)
return False;
psdb = *ppsdb;
if (UNMARSHALLING(ps) && psdb == NULL) {
if((psdb = PRS_ALLOC_MEM(ps,SEC_DESC_BUF,1)) == NULL)
return False;
*ppsdb = psdb;
}
prs_debug(ps, depth, desc, "sec_io_desc_buf");
depth++;
if(!prs_align(ps))
return False;
if(!prs_uint32_pre("max_len", ps, depth, &psdb->sd_size, &off_max_len))
return False;
ptr = 1;
if(!prs_uint32 ("ptr ", ps, depth, &ptr))
return False;
len = ndr_size_security_descriptor(psdb->sd, 0);
if(!prs_uint32_pre("len ", ps, depth, &len, &off_len))
return False;
old_offset = prs_offset(ps);
/* reading, length is non-zero; writing, descriptor is non-NULL */
if ((UNMARSHALLING(ps) && psdb->sd_size != 0) || (MARSHALLING(ps) && psdb->sd != NULL)) {
if(!sec_io_desc("sec ", &psdb->sd, ps, depth))
return False;
}
if(!prs_align(ps))
return False;
size = prs_offset(ps) - old_offset;
if(!prs_uint32_post("max_len", ps, depth, &psdb->sd_size, off_max_len, size == 0 ? psdb->sd_size : size))
return False;
if(!prs_uint32_post("len ", ps, depth, &len, off_len, size))
return False;
return True;
}