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samba-mirror/source3/lib/util_sid.c

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/*
Unix SMB/CIFS implementation.
Samba utility functions
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Luke Kenneth Caseson Leighton 1998-1999
Copyright (C) Jeremy Allison 1999
Copyright (C) Stefan (metze) Metzmacher 2002
Copyright (C) Simo Sorce 2002
Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2005
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"
/*
* Some useful sids
*/
const DOM_SID global_sid_World_Domain = /* Everyone domain */
{ 1, 0, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_World = /* Everyone */
{ 1, 1, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Creator_Owner_Domain = /* Creator Owner domain */
{ 1, 0, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_NT_Authority = /* NT Authority */
{ 1, 0, {0,0,0,0,0,5}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_System = /* System */
{ 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_NULL = /* NULL sid */
{ 1, 1, {0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Authenticated_Users = /* All authenticated rids */
{ 1, 1, {0,0,0,0,0,5}, {11,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Network = /* Network rids */
{ 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Creator_Owner = /* Creator Owner */
{ 1, 1, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Creator_Group = /* Creator Group */
{ 1, 1, {0,0,0,0,0,3}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Anonymous = /* Anonymous login */
{ 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin = /* Local well-known domain */
{ 1, 1, {0,0,0,0,0,5}, {32,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Administrators = /* Builtin administrators */
{ 1, 2, {0,0,0,0,0,5}, {32,544,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Users = /* Builtin users */
{ 1, 2, {0,0,0,0,0,5}, {32,545,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Guests = /* Builtin guest users */
{ 1, 2, {0,0,0,0,0,5}, {32,546,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Power_Users = /* Builtin power users */
{ 1, 2, {0,0,0,0,0,5}, {32,547,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Account_Operators = /* Builtin account operators */
{ 1, 2, {0,0,0,0,0,5}, {32,548,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Server_Operators = /* Builtin server operators */
{ 1, 2, {0,0,0,0,0,5}, {32,549,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Print_Operators = /* Builtin print operators */
{ 1, 2, {0,0,0,0,0,5}, {32,550,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Backup_Operators = /* Builtin backup operators */
{ 1, 2, {0,0,0,0,0,5}, {32,551,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_Replicator = /* Builtin replicator */
{ 1, 2, {0,0,0,0,0,5}, {32,552,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Builtin_PreWin2kAccess = /* Builtin pre win2k access */
{ 1, 2, {0,0,0,0,0,5}, {32,554,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Unix_Users = /* Unmapped Unix users */
{ 1, 1, {0,0,0,0,0,22}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
const DOM_SID global_sid_Unix_Groups = /* Unmapped Unix groups */
{ 1, 1, {0,0,0,0,0,22}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
/* Unused, left here for documentary purposes */
#if 0
#define SECURITY_NULL_SID_AUTHORITY 0
#define SECURITY_WORLD_SID_AUTHORITY 1
#define SECURITY_LOCAL_SID_AUTHORITY 2
#define SECURITY_CREATOR_SID_AUTHORITY 3
#define SECURITY_NT_AUTHORITY 5
#endif
/*
* An NT compatible anonymous token.
*/
static DOM_SID anon_sid_array[3] =
{ { 1, 1, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}},
{ 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}},
{ 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} };
NT_USER_TOKEN anonymous_token = { 3, anon_sid_array, SE_NONE };
static DOM_SID system_sid_array[1] =
{ { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} };
NT_USER_TOKEN system_token = { 1, system_sid_array, SE_ALL_PRIVS };
/****************************************************************************
Lookup string names for SID types.
****************************************************************************/
static const struct {
enum lsa_SidType sid_type;
const char *string;
} sid_name_type[] = {
{SID_NAME_USER, "User"},
{SID_NAME_DOM_GRP, "Domain Group"},
{SID_NAME_DOMAIN, "Domain"},
{SID_NAME_ALIAS, "Local Group"},
{SID_NAME_WKN_GRP, "Well-known Group"},
{SID_NAME_DELETED, "Deleted Account"},
{SID_NAME_INVALID, "Invalid Account"},
{SID_NAME_UNKNOWN, "UNKNOWN"},
{SID_NAME_COMPUTER, "Computer"},
{(enum lsa_SidType)0, NULL}
};
const char *sid_type_lookup(uint32 sid_type)
{
int i = 0;
/* Look through list */
while(sid_name_type[i].sid_type != 0) {
if (sid_name_type[i].sid_type == sid_type)
return sid_name_type[i].string;
i++;
}
/* Default return */
return "SID *TYPE* is INVALID";
}
/**************************************************************************
Create the SYSTEM token.
***************************************************************************/
NT_USER_TOKEN *get_system_token(void)
{
return &system_token;
}
/******************************************************************
get the default domain/netbios name to be used when dealing
with our passdb list of accounts
******************************************************************/
const char *get_global_sam_name(void)
{
if ((lp_server_role() == ROLE_DOMAIN_PDC) || (lp_server_role() == ROLE_DOMAIN_BDC)) {
return lp_workgroup();
}
return global_myname();
}
/*****************************************************************
Convert a SID to an ascii string.
*****************************************************************/
char *sid_to_string(fstring sidstr_out, const DOM_SID *sid)
{
char subauth[16];
int i;
uint32 ia;
if (!sid) {
fstrcpy(sidstr_out, "(NULL SID)");
return sidstr_out;
}
/*
* BIG NOTE: this function only does SIDS where the identauth is not >= 2^32
* in a range of 2^48.
*/
ia = (sid->id_auth[5]) +
(sid->id_auth[4] << 8 ) +
(sid->id_auth[3] << 16) +
(sid->id_auth[2] << 24);
slprintf(sidstr_out, sizeof(fstring) - 1, "S-%u-%lu", (unsigned int)sid->sid_rev_num, (unsigned long)ia);
for (i = 0; i < sid->num_auths; i++) {
slprintf(subauth, sizeof(subauth)-1, "-%lu", (unsigned long)sid->sub_auths[i]);
fstrcat(sidstr_out, subauth);
}
return sidstr_out;
}
/*****************************************************************
Useful function for debug lines.
*****************************************************************/
const char *sid_string_static(const DOM_SID *sid)
{
static fstring sid_str;
sid_to_string(sid_str, sid);
return sid_str;
}
/*****************************************************************
Convert a string to a SID. Returns True on success, False on fail.
*****************************************************************/
BOOL string_to_sid(DOM_SID *sidout, const char *sidstr)
{
const char *p;
char *q;
/* BIG NOTE: this function only does SIDS where the identauth is not >= 2^32 */
uint32 conv;
if ((sidstr[0] != 'S' && sidstr[0] != 's') || sidstr[1] != '-') {
DEBUG(3,("string_to_sid: Sid %s does not start with 'S-'.\n", sidstr));
return False;
}
ZERO_STRUCTP(sidout);
/* Get the revision number. */
p = sidstr + 2;
conv = (uint32) strtoul(p, &q, 10);
if (!q || (*q != '-')) {
DEBUG(3,("string_to_sid: Sid %s is not in a valid format.\n", sidstr));
return False;
}
sidout->sid_rev_num = (uint8) conv;
q++;
/* get identauth */
conv = (uint32) strtoul(q, &q, 10);
if (!q || (*q != '-')) {
DEBUG(0,("string_to_sid: Sid %s is not in a valid format.\n", sidstr));
return False;
}
/* identauth in decimal should be < 2^32 */
/* NOTE - the conv value is in big-endian format. */
sidout->id_auth[0] = 0;
sidout->id_auth[1] = 0;
sidout->id_auth[2] = (conv & 0xff000000) >> 24;
sidout->id_auth[3] = (conv & 0x00ff0000) >> 16;
sidout->id_auth[4] = (conv & 0x0000ff00) >> 8;
sidout->id_auth[5] = (conv & 0x000000ff);
q++;
sidout->num_auths = 0;
for(conv = (uint32) strtoul(q, &q, 10);
q && (*q =='-' || *q =='\0') && (sidout->num_auths < MAXSUBAUTHS);
conv = (uint32) strtoul(q, &q, 10)) {
sid_append_rid(sidout, conv);
if (*q == '\0')
break;
q++;
}
return True;
}
DOM_SID *string_sid_talloc(TALLOC_CTX *mem_ctx, const char *sidstr)
{
DOM_SID *result = TALLOC_P(mem_ctx, DOM_SID);
if (result == NULL)
return NULL;
if (!string_to_sid(result, sidstr))
return NULL;
return result;
}
/*****************************************************************
Add a rid to the end of a sid
*****************************************************************/
BOOL sid_append_rid(DOM_SID *sid, uint32 rid)
{
if (sid->num_auths < MAXSUBAUTHS) {
sid->sub_auths[sid->num_auths++] = rid;
return True;
}
return False;
}
BOOL sid_compose(DOM_SID *dst, const DOM_SID *domain_sid, uint32 rid)
{
sid_copy(dst, domain_sid);
return sid_append_rid(dst, rid);
}
/*****************************************************************
Removes the last rid from the end of a sid
*****************************************************************/
BOOL sid_split_rid(DOM_SID *sid, uint32 *rid)
{
if (sid->num_auths > 0) {
sid->num_auths--;
*rid = sid->sub_auths[sid->num_auths];
return True;
}
return False;
}
/*****************************************************************
Return the last rid from the end of a sid
*****************************************************************/
BOOL sid_peek_rid(const DOM_SID *sid, uint32 *rid)
{
if (!sid || !rid)
return False;
if (sid->num_auths > 0) {
*rid = sid->sub_auths[sid->num_auths - 1];
return True;
}
return False;
}
/*****************************************************************
Return the last rid from the end of a sid
and check the sid against the exp_dom_sid
*****************************************************************/
BOOL sid_peek_check_rid(const DOM_SID *exp_dom_sid, const DOM_SID *sid, uint32 *rid)
{
if (!exp_dom_sid || !sid || !rid)
return False;
if (sid->num_auths != (exp_dom_sid->num_auths+1)) {
return False;
}
if (sid_compare_domain(exp_dom_sid, sid)!=0){
*rid=(-1);
return False;
}
return sid_peek_rid(sid, rid);
}
/*****************************************************************
Copies a sid
*****************************************************************/
void sid_copy(DOM_SID *dst, const DOM_SID *src)
{
int i;
ZERO_STRUCTP(dst);
dst->sid_rev_num = src->sid_rev_num;
dst->num_auths = src->num_auths;
memcpy(&dst->id_auth[0], &src->id_auth[0], sizeof(src->id_auth));
for (i = 0; i < src->num_auths; i++)
dst->sub_auths[i] = src->sub_auths[i];
}
/*****************************************************************
Write a sid out into on-the-wire format.
*****************************************************************/
BOOL sid_linearize(char *outbuf, size_t len, const DOM_SID *sid)
{
size_t i;
if (len < sid_size(sid))
return False;
SCVAL(outbuf,0,sid->sid_rev_num);
SCVAL(outbuf,1,sid->num_auths);
memcpy(&outbuf[2], sid->id_auth, 6);
for(i = 0; i < sid->num_auths; i++)
SIVAL(outbuf, 8 + (i*4), sid->sub_auths[i]);
return True;
}
/*****************************************************************
Parse a on-the-wire SID to a DOM_SID.
*****************************************************************/
BOOL sid_parse(const char *inbuf, size_t len, DOM_SID *sid)
{
int i;
if (len < 8)
return False;
ZERO_STRUCTP(sid);
sid->sid_rev_num = CVAL(inbuf, 0);
sid->num_auths = CVAL(inbuf, 1);
memcpy(sid->id_auth, inbuf+2, 6);
if (len < 8 + sid->num_auths*4)
return False;
for (i=0;i<sid->num_auths;i++)
sid->sub_auths[i] = IVAL(inbuf, 8+i*4);
return True;
}
/*****************************************************************
Compare the auth portion of two sids.
*****************************************************************/
static int sid_compare_auth(const DOM_SID *sid1, const DOM_SID *sid2)
{
int i;
if (sid1 == sid2)
return 0;
if (!sid1)
return -1;
if (!sid2)
return 1;
if (sid1->sid_rev_num != sid2->sid_rev_num)
return sid1->sid_rev_num - sid2->sid_rev_num;
for (i = 0; i < 6; i++)
if (sid1->id_auth[i] != sid2->id_auth[i])
return sid1->id_auth[i] - sid2->id_auth[i];
return 0;
}
/*****************************************************************
Compare two sids.
*****************************************************************/
int sid_compare(const DOM_SID *sid1, const DOM_SID *sid2)
{
int i;
if (sid1 == sid2)
return 0;
if (!sid1)
return -1;
if (!sid2)
return 1;
/* Compare most likely different rids, first: i.e start at end */
if (sid1->num_auths != sid2->num_auths)
return sid1->num_auths - sid2->num_auths;
for (i = sid1->num_auths-1; i >= 0; --i)
if (sid1->sub_auths[i] != sid2->sub_auths[i])
return sid1->sub_auths[i] - sid2->sub_auths[i];
return sid_compare_auth(sid1, sid2);
}
/*****************************************************************
See if 2 SIDs are in the same domain
this just compares the leading sub-auths
*****************************************************************/
int sid_compare_domain(const DOM_SID *sid1, const DOM_SID *sid2)
{
int n, i;
n = MIN(sid1->num_auths, sid2->num_auths);
for (i = n-1; i >= 0; --i)
if (sid1->sub_auths[i] != sid2->sub_auths[i])
return sid1->sub_auths[i] - sid2->sub_auths[i];
return sid_compare_auth(sid1, sid2);
}
/*****************************************************************
Compare two sids.
*****************************************************************/
BOOL sid_equal(const DOM_SID *sid1, const DOM_SID *sid2)
{
return sid_compare(sid1, sid2) == 0;
}
/*****************************************************************
Calculates size of a sid.
*****************************************************************/
size_t sid_size(const DOM_SID *sid)
{
if (sid == NULL)
return 0;
return sid->num_auths * sizeof(uint32) + 8;
}
/*****************************************************************
Returns true if SID is internal (and non-mappable).
*****************************************************************/
BOOL non_mappable_sid(DOM_SID *sid)
{
DOM_SID dom;
uint32 rid;
sid_copy(&dom, sid);
sid_split_rid(&dom, &rid);
if (sid_equal(&dom, &global_sid_Builtin))
return True;
if (sid_equal(&dom, &global_sid_NT_Authority))
return True;
return False;
}
/*****************************************************************
Return the binary string representation of a DOM_SID.
Caller must free.
*****************************************************************/
char *sid_binstring(const DOM_SID *sid)
{
char *buf, *s;
int len = sid_size(sid);
buf = (char *)SMB_MALLOC(len);
if (!buf)
return NULL;
sid_linearize(buf, len, sid);
s = binary_string_rfc2254(buf, len);
free(buf);
return s;
}
/*****************************************************************
Return the binary string representation of a DOM_SID.
Caller must free.
*****************************************************************/
char *sid_binstring_hex(const DOM_SID *sid)
{
char *buf, *s;
int len = sid_size(sid);
buf = (char *)SMB_MALLOC(len);
if (!buf)
return NULL;
sid_linearize(buf, len, sid);
s = binary_string(buf, len);
free(buf);
return s;
}
/*******************************************************************
Tallocs a duplicate SID.
********************************************************************/
DOM_SID *sid_dup_talloc(TALLOC_CTX *ctx, const DOM_SID *src)
{
DOM_SID *dst;
if(!src)
return NULL;
if((dst = TALLOC_ZERO_P(ctx, DOM_SID)) != NULL) {
sid_copy( dst, src);
}
return dst;
}
/********************************************************************
Add SID to an array SIDs
********************************************************************/
BOOL add_sid_to_array(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
DOM_SID **sids, size_t *num)
{
*sids = TALLOC_REALLOC_ARRAY(mem_ctx, *sids, DOM_SID,
(*num)+1);
r13915: Fixed a very interesting class of realloc() bugs found by Coverity. realloc can return NULL in one of two cases - (1) the realloc failed, (2) realloc succeeded but the new size requested was zero, in which case this is identical to a free() call. The error paths dealing with these two cases should be different, but mostly weren't. Secondly the standard idiom for dealing with realloc when you know the new size is non-zero is the following : tmp = realloc(p, size); if (!tmp) { SAFE_FREE(p); return error; } else { p = tmp; } However, there were *many* *many* places in Samba where we were using the old (broken) idiom of : p = realloc(p, size) if (!p) { return error; } which will leak the memory pointed to by p on realloc fail. This commit (hopefully) fixes all these cases by moving to a standard idiom of : p = SMB_REALLOC(p, size) if (!p) { return error; } Where if the realloc returns null due to the realloc failing or size == 0 we *guarentee* that the storage pointed to by p has been freed. This allows me to remove a lot of code that was dealing with the standard (more verbose) method that required a tmp pointer. This is almost always what you want. When a realloc fails you never usually want the old memory, you want to free it and get into your error processing asap. For the 11 remaining cases where we really do need to keep the old pointer I have invented the new macro SMB_REALLOC_KEEP_OLD_ON_ERROR, which can be used as follows : tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size); if (!tmp) { SAFE_FREE(p); return error; } else { p = tmp; } SMB_REALLOC_KEEP_OLD_ON_ERROR guarentees never to free the pointer p, even on size == 0 or realloc fail. All this is done by a hidden extra argument to Realloc(), BOOL free_old_on_error which is set appropriately by the SMB_REALLOC and SMB_REALLOC_KEEP_OLD_ON_ERROR macros (and their array counterparts). It remains to be seen what this will do to our Coverity bug count :-). Jeremy. (This used to be commit 1d710d06a214f3f1740e80e0bffd6aab44aac2b0)
2006-03-07 09:31:04 +03:00
if (*sids == NULL) {
*num = 0;
return False;
r13915: Fixed a very interesting class of realloc() bugs found by Coverity. realloc can return NULL in one of two cases - (1) the realloc failed, (2) realloc succeeded but the new size requested was zero, in which case this is identical to a free() call. The error paths dealing with these two cases should be different, but mostly weren't. Secondly the standard idiom for dealing with realloc when you know the new size is non-zero is the following : tmp = realloc(p, size); if (!tmp) { SAFE_FREE(p); return error; } else { p = tmp; } However, there were *many* *many* places in Samba where we were using the old (broken) idiom of : p = realloc(p, size) if (!p) { return error; } which will leak the memory pointed to by p on realloc fail. This commit (hopefully) fixes all these cases by moving to a standard idiom of : p = SMB_REALLOC(p, size) if (!p) { return error; } Where if the realloc returns null due to the realloc failing or size == 0 we *guarentee* that the storage pointed to by p has been freed. This allows me to remove a lot of code that was dealing with the standard (more verbose) method that required a tmp pointer. This is almost always what you want. When a realloc fails you never usually want the old memory, you want to free it and get into your error processing asap. For the 11 remaining cases where we really do need to keep the old pointer I have invented the new macro SMB_REALLOC_KEEP_OLD_ON_ERROR, which can be used as follows : tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size); if (!tmp) { SAFE_FREE(p); return error; } else { p = tmp; } SMB_REALLOC_KEEP_OLD_ON_ERROR guarentees never to free the pointer p, even on size == 0 or realloc fail. All this is done by a hidden extra argument to Realloc(), BOOL free_old_on_error which is set appropriately by the SMB_REALLOC and SMB_REALLOC_KEEP_OLD_ON_ERROR macros (and their array counterparts). It remains to be seen what this will do to our Coverity bug count :-). Jeremy. (This used to be commit 1d710d06a214f3f1740e80e0bffd6aab44aac2b0)
2006-03-07 09:31:04 +03:00
}
sid_copy(&((*sids)[*num]), sid);
*num += 1;
return True;
}
/********************************************************************
Add SID to an array SIDs ensuring that it is not already there
********************************************************************/
BOOL add_sid_to_array_unique(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
DOM_SID **sids, size_t *num_sids)
{
size_t i;
for (i=0; i<(*num_sids); i++) {
if (sid_compare(sid, &(*sids)[i]) == 0)
return True;
}
return add_sid_to_array(mem_ctx, sid, sids, num_sids);
}
/********************************************************************
Remove SID from an array
********************************************************************/
void del_sid_from_array(const DOM_SID *sid, DOM_SID **sids, size_t *num)
{
DOM_SID *sid_list = *sids;
size_t i;
for ( i=0; i<*num; i++ ) {
/* if we find the SID, then decrement the count
and break out of the loop */
if ( sid_equal(sid, &sid_list[i]) ) {
*num -= 1;
break;
}
}
/* This loop will copy the remainder of the array
if i < num of sids ni the array */
for ( ; i<*num; i++ )
sid_copy( &sid_list[i], &sid_list[i+1] );
return;
}
BOOL add_rid_to_array_unique(TALLOC_CTX *mem_ctx,
uint32 rid, uint32 **pp_rids, size_t *p_num)
{
size_t i;
for (i=0; i<*p_num; i++) {
if ((*pp_rids)[i] == rid)
return True;
}
*pp_rids = TALLOC_REALLOC_ARRAY(mem_ctx, *pp_rids, uint32, *p_num+1);
if (*pp_rids == NULL) {
*p_num = 0;
return False;
}
(*pp_rids)[*p_num] = rid;
*p_num += 1;
return True;
}
BOOL is_null_sid(const DOM_SID *sid)
{
static const DOM_SID null_sid = {0};
return sid_equal(sid, &null_sid);
}