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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
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
*/
DOM_SID global_sid_World_Domain; /* Everyone domain */
DOM_SID global_sid_World; /* Everyone */
DOM_SID global_sid_Creator_Owner_Domain; /* Creator Owner domain */
DOM_SID global_sid_NT_Authority; /* NT Authority */
DOM_SID global_sid_System; /* System */
DOM_SID global_sid_NULL; /* NULL sid */
DOM_SID global_sid_Authenticated_Users; /* All authenticated rids */
DOM_SID global_sid_Network; /* Network rids */
DOM_SID global_sid_Creator_Owner; /* Creator Owner */
DOM_SID global_sid_Creator_Group; /* Creator Group */
DOM_SID global_sid_Anonymous; /* Anonymous login */
DOM_SID global_sid_Builtin; /* Local well-known domain */
DOM_SID global_sid_Builtin_Administrators; /* Builtin administrators */
DOM_SID global_sid_Builtin_Users; /* Builtin users */
DOM_SID global_sid_Builtin_Guests; /* Builtin guest users */
DOM_SID global_sid_Builtin_Power_Users; /* Builtin power users */
DOM_SID global_sid_Builtin_Account_Operators; /* Builtin account operators */
DOM_SID global_sid_Builtin_Server_Operators; /* Builtin server operators */
DOM_SID global_sid_Builtin_Print_Operators; /* Builtin print operators */
DOM_SID global_sid_Builtin_Backup_Operators; /* Builtin backup operators */
DOM_SID global_sid_Builtin_Replicator; /* Builtin replicator */
#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
/*
* An NT compatible anonymous token.
*/
static DOM_SID anon_sid_array[3];
NT_USER_TOKEN anonymous_token = {
3,
anon_sid_array
};
static DOM_SID system_sid_array[4];
NT_USER_TOKEN system_token = {
1,
system_sid_array
};
/****************************************************************************
Lookup string names for SID types.
****************************************************************************/
static const struct {
enum SID_NAME_USE 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 SID_NAME_USE)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";
}
/****************************************************************************
Creates some useful well known sids
****************************************************************************/
void generate_wellknown_sids(void)
{
static BOOL initialised = False;
if (initialised)
return;
/* SECURITY_NULL_SID_AUTHORITY */
string_to_sid(&global_sid_NULL, "S-1-0-0");
/* SECURITY_WORLD_SID_AUTHORITY */
string_to_sid(&global_sid_World_Domain, "S-1-1");
string_to_sid(&global_sid_World, "S-1-1-0");
/* SECURITY_CREATOR_SID_AUTHORITY */
string_to_sid(&global_sid_Creator_Owner_Domain, "S-1-3");
string_to_sid(&global_sid_Creator_Owner, "S-1-3-0");
string_to_sid(&global_sid_Creator_Group, "S-1-3-1");
/* SECURITY_NT_AUTHORITY */
string_to_sid(&global_sid_NT_Authority, "S-1-5");
string_to_sid(&global_sid_Network, "S-1-5-2");
string_to_sid(&global_sid_Anonymous, "S-1-5-7");
string_to_sid(&global_sid_Authenticated_Users, "S-1-5-11");
string_to_sid(&global_sid_System, "S-1-5-18");
/* SECURITY_BUILTIN_DOMAIN_RID */
string_to_sid(&global_sid_Builtin, "S-1-5-32");
string_to_sid(&global_sid_Builtin_Administrators, "S-1-5-32-544");
string_to_sid(&global_sid_Builtin_Users, "S-1-5-32-545");
string_to_sid(&global_sid_Builtin_Guests, "S-1-5-32-546");
string_to_sid(&global_sid_Builtin_Power_Users, "S-1-5-32-547");
string_to_sid(&global_sid_Builtin_Account_Operators, "S-1-5-32-548");
string_to_sid(&global_sid_Builtin_Server_Operators, "S-1-5-32-549");
string_to_sid(&global_sid_Builtin_Print_Operators, "S-1-5-32-550");
string_to_sid(&global_sid_Builtin_Backup_Operators, "S-1-5-32-551");
string_to_sid(&global_sid_Builtin_Replicator, "S-1-5-32-552");
/* Create the anon token. */
sid_copy( &anonymous_token.user_sids[0], &global_sid_World);
sid_copy( &anonymous_token.user_sids[1], &global_sid_Network);
sid_copy( &anonymous_token.user_sids[2], &global_sid_Anonymous);
/* Create the system token. */
sid_copy( &system_token.user_sids[0], &global_sid_System);
initialised = True;
}
/**************************************************************************
Create the SYSTEM token.
***************************************************************************/
NT_USER_TOKEN *get_system_token(void)
{
generate_wellknown_sids(); /* The token is initialised here */
return &system_token;
}
/**************************************************************************
Splits a name of format \DOMAIN\name or name into its two components.
Sets the DOMAIN name to global_myname() if it has not been specified.
***************************************************************************/
void split_domain_name(const char *fullname, char *domain, char *name)
{
pstring full_name;
const char *sep;
char *p;
sep = lp_winbind_separator();
*domain = *name = '\0';
if (fullname[0] == sep[0] || fullname[0] == '\\')
fullname++;
pstrcpy(full_name, fullname);
p = strchr_m(full_name+1, '\\');
if (!p) p = strchr_m(full_name+1, sep[0]);
if (p != NULL) {
*p = 0;
fstrcpy(domain, full_name);
fstrcpy(name, p+1);
} else {
if(!lp_domain_logons()) {
fstrcpy(domain, global_myname());
fstrcpy(name, full_name);
} else {
fstrcpy(domain, lp_workgroup());
fstrcpy(name, full_name);
}
fstrcpy(domain, global_myname());
fstrcpy(name, full_name);
}
DEBUG(10,("split_domain_name:name '%s' split into domain :'%s' and user :'%s'\n",
fullname, domain, name));
}
/****************************************************************************
Test if a SID is wellknown and resolvable.
****************************************************************************/
BOOL resolvable_wellknown_sid(DOM_SID *sid)
{
uint32 ia = (sid->id_auth[5]) +
(sid->id_auth[4] << 8 ) +
(sid->id_auth[3] << 16) +
(sid->id_auth[2] << 24);
if (sid->sid_rev_num != SEC_DESC_REVISION || sid->num_auths < 1)
return False;
return (ia == SECURITY_WORLD_SID_AUTHORITY ||
ia == SECURITY_CREATOR_SID_AUTHORITY);
}
/*****************************************************************
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)
{
pstring tok;
char *q;
const char *p;
/* BIG NOTE: this function only does SIDS where the identauth is not >= 2^32 */
uint32 ia;
if (StrnCaseCmp( sidstr, "S-", 2)) {
DEBUG(0,("string_to_sid: Sid %s does not start with 'S-'.\n", sidstr));
return False;
}
memset((char *)sidout, '\0', sizeof(DOM_SID));
p = q = strdup(sidstr + 2);
if (p == NULL) {
DEBUG(0, ("string_to_sid: out of memory!\n"));
return False;
}
if (!next_token(&p, tok, "-", sizeof(tok))) {
DEBUG(0,("string_to_sid: Sid %s is not in a valid format.\n", sidstr));
SAFE_FREE(q);
return False;
}
/* Get the revision number. */
sidout->sid_rev_num = (uint8)strtoul(tok, NULL, 10);
if (!next_token(&p, tok, "-", sizeof(tok))) {
DEBUG(0,("string_to_sid: Sid %s is not in a valid format.\n", sidstr));
SAFE_FREE(q);
return False;
}
/* identauth in decimal should be < 2^32 */
ia = (uint32)strtoul(tok, NULL, 10);
/* NOTE - the ia value is in big-endian format. */
sidout->id_auth[0] = 0;
sidout->id_auth[1] = 0;
sidout->id_auth[2] = (ia & 0xff000000) >> 24;
sidout->id_auth[3] = (ia & 0x00ff0000) >> 16;
sidout->id_auth[4] = (ia & 0x0000ff00) >> 8;
sidout->id_auth[5] = (ia & 0x000000ff);
sidout->num_auths = 0;
while(next_token(&p, tok, "-", sizeof(tok)) &&
sidout->num_auths < MAXSUBAUTHS) {
/*
* NOTE - the subauths are in native machine-endian format. They
* are converted to little-endian when linearized onto the wire.
*/
sid_append_rid(sidout, (uint32)strtoul(tok, NULL, 10));
}
SAFE_FREE(q);
return True;
}
/*****************************************************************
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;
}
/*****************************************************************
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;
}
/*****************************************************************
Check if the SID is the builtin SID (S-1-5-32).
*****************************************************************/
BOOL sid_check_is_builtin(const DOM_SID *sid)
{
return sid_equal(sid, &global_sid_Builtin);
}
/*****************************************************************
Check if the SID is one of the builtin SIDs (S-1-5-32-a).
*****************************************************************/
BOOL sid_check_is_in_builtin(const DOM_SID *sid)
{
DOM_SID dom_sid;
uint32 rid;
sid_copy(&dom_sid, sid);
sid_split_rid(&dom_sid, &rid);
return sid_equal(&dom_sid, &global_sid_Builtin);
}
/*****************************************************************
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 = malloc(len);
if (!buf)
return NULL;
sid_linearize(buf, len, sid);
s = binary_string(buf, len);
free(buf);
return s;
}
/*****************************************************************
Print a GUID structure for debugging.
*****************************************************************/
void print_guid(GUID *guid)
{
int i;
d_printf("%08x-%04x-%04x",
IVAL(guid->info, 0), SVAL(guid->info, 4), SVAL(guid->info, 6));
d_printf("-%02x%02x-", guid->info[8], guid->info[9]);
for (i=10;i<GUID_SIZE;i++)
d_printf("%02x", guid->info[i]);
d_printf("\n");
}
/*******************************************************************
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(ctx, sizeof(DOM_SID))) != NULL) {
sid_copy( dst, src);
}
return dst;
}
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