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372 lines
12 KiB
C
372 lines
12 KiB
C
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/*
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Unix SMB/CIFS implementation.
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Samba utility functions
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Copyright (C) Andrew Tridgell 1992-1998
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Copyright (C) Luke Kenneth Caseson Leighton 1998-1999
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Copyright (C) Jeremy Allison 1999
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Copyright (C) Stefan (metze) Metzmacher 2002
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Copyright (C) Simo Sorce 2002
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Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2005
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Copyright (C) Andrew Bartlett 2010
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "../librpc/gen_ndr/ndr_security.h"
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#include "../librpc/gen_ndr/netlogon.h"
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#include "../libcli/security/security.h"
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/*
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* Some useful sids, more well known sids can be found at
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* http://support.microsoft.com/kb/243330/EN-US/
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*/
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const struct dom_sid global_sid_World_Domain = /* Everyone domain */
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{ 1, 0, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_World = /* Everyone */
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{ 1, 1, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Creator_Owner_Domain = /* Creator Owner domain */
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{ 1, 0, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_NT_Authority = /* NT Authority */
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{ 1, 0, {0,0,0,0,0,5}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_System = /* System */
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{ 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_NULL = /* NULL sid */
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{ 1, 1, {0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Authenticated_Users = /* All authenticated rids */
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{ 1, 1, {0,0,0,0,0,5}, {11,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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#if 0
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/* for documentation */
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const struct dom_sid global_sid_Restriced = /* Restriced Code */
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{ 1, 1, {0,0,0,0,0,5}, {12,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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#endif
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const struct dom_sid global_sid_Network = /* Network rids */
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{ 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Creator_Owner = /* Creator Owner */
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{ 1, 1, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Creator_Group = /* Creator Group */
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{ 1, 1, {0,0,0,0,0,3}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Anonymous = /* Anonymous login */
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{ 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Enterprise_DCs = /* Enterprise DCs */
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{ 1, 1, {0,0,0,0,0,5}, {9,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Builtin = /* Local well-known domain */
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{ 1, 1, {0,0,0,0,0,5}, {32,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Builtin_Administrators = /* Builtin administrators */
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{ 1, 2, {0,0,0,0,0,5}, {32,544,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Builtin_Users = /* Builtin users */
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{ 1, 2, {0,0,0,0,0,5}, {32,545,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Builtin_Guests = /* Builtin guest users */
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{ 1, 2, {0,0,0,0,0,5}, {32,546,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Builtin_Power_Users = /* Builtin power users */
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{ 1, 2, {0,0,0,0,0,5}, {32,547,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Builtin_Account_Operators = /* Builtin account operators */
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{ 1, 2, {0,0,0,0,0,5}, {32,548,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Builtin_Server_Operators = /* Builtin server operators */
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{ 1, 2, {0,0,0,0,0,5}, {32,549,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Builtin_Print_Operators = /* Builtin print operators */
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{ 1, 2, {0,0,0,0,0,5}, {32,550,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Builtin_Backup_Operators = /* Builtin backup operators */
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{ 1, 2, {0,0,0,0,0,5}, {32,551,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Builtin_Replicator = /* Builtin replicator */
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{ 1, 2, {0,0,0,0,0,5}, {32,552,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Builtin_PreWin2kAccess = /* Builtin pre win2k access */
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{ 1, 2, {0,0,0,0,0,5}, {32,554,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Unix_Users = /* Unmapped Unix users */
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{ 1, 1, {0,0,0,0,0,22}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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const struct dom_sid global_sid_Unix_Groups = /* Unmapped Unix groups */
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{ 1, 1, {0,0,0,0,0,22}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
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/* Unused, left here for documentary purposes */
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#if 0
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#define SECURITY_NULL_SID_AUTHORITY 0
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#define SECURITY_WORLD_SID_AUTHORITY 1
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#define SECURITY_LOCAL_SID_AUTHORITY 2
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#define SECURITY_CREATOR_SID_AUTHORITY 3
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#define SECURITY_NT_AUTHORITY 5
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#endif
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static struct dom_sid system_sid_array[1] =
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{ { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}} };
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static const struct security_token system_token = {
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.num_sids = ARRAY_SIZE(system_sid_array),
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.sids = system_sid_array,
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.privilege_mask = SE_ALL_PRIVS
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};
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/****************************************************************************
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Lookup string names for SID types.
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****************************************************************************/
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static const struct {
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enum lsa_SidType sid_type;
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const char *string;
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} sid_name_type[] = {
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{SID_NAME_USE_NONE, "None"},
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{SID_NAME_USER, "User"},
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{SID_NAME_DOM_GRP, "Domain Group"},
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{SID_NAME_DOMAIN, "Domain"},
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{SID_NAME_ALIAS, "Local Group"},
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{SID_NAME_WKN_GRP, "Well-known Group"},
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{SID_NAME_DELETED, "Deleted Account"},
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{SID_NAME_INVALID, "Invalid Account"},
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{SID_NAME_UNKNOWN, "UNKNOWN"},
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{SID_NAME_COMPUTER, "Computer"},
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{(enum lsa_SidType)0, NULL}
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};
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const char *sid_type_lookup(uint32_t sid_type)
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{
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int i = 0;
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/* Look through list */
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while(sid_name_type[i].sid_type != 0) {
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if (sid_name_type[i].sid_type == sid_type)
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return sid_name_type[i].string;
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i++;
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}
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/* Default return */
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return "SID *TYPE* is INVALID";
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}
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/**************************************************************************
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Create the SYSTEM token.
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***************************************************************************/
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const struct security_token *get_system_token(void)
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{
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return &system_token;
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}
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bool sid_compose(struct dom_sid *dst, const struct dom_sid *domain_sid, uint32_t rid)
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{
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sid_copy(dst, domain_sid);
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return sid_append_rid(dst, rid);
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}
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/*****************************************************************
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Removes the last rid from the end of a sid
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*****************************************************************/
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bool sid_split_rid(struct dom_sid *sid, uint32_t *rid)
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{
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if (sid->num_auths > 0) {
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sid->num_auths--;
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*rid = sid->sub_auths[sid->num_auths];
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return true;
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}
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return false;
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}
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/*****************************************************************
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Return the last rid from the end of a sid
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*****************************************************************/
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bool sid_peek_rid(const struct dom_sid *sid, uint32_t *rid)
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{
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if (!sid || !rid)
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return false;
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if (sid->num_auths > 0) {
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*rid = sid->sub_auths[sid->num_auths - 1];
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return true;
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}
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return false;
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}
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/*****************************************************************
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Return the last rid from the end of a sid
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and check the sid against the exp_dom_sid
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*****************************************************************/
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bool sid_peek_check_rid(const struct dom_sid *exp_dom_sid, const struct dom_sid *sid, uint32_t *rid)
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{
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if (!exp_dom_sid || !sid || !rid)
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return false;
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if (sid->num_auths != (exp_dom_sid->num_auths+1)) {
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return false;
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}
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if (sid_compare_domain(exp_dom_sid, sid)!=0){
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*rid=(-1);
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return false;
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}
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return sid_peek_rid(sid, rid);
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}
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/*****************************************************************
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Copies a sid
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*****************************************************************/
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void sid_copy(struct dom_sid *dst, const struct dom_sid *src)
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{
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int i;
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ZERO_STRUCTP(dst);
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dst->sid_rev_num = src->sid_rev_num;
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dst->num_auths = src->num_auths;
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memcpy(&dst->id_auth[0], &src->id_auth[0], sizeof(src->id_auth));
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for (i = 0; i < src->num_auths; i++)
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dst->sub_auths[i] = src->sub_auths[i];
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}
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/*****************************************************************
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Parse a on-the-wire SID to a struct dom_sid.
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*****************************************************************/
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bool sid_parse(const char *inbuf, size_t len, struct dom_sid *sid)
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{
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enum ndr_err_code ndr_err;
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DATA_BLOB in = data_blob_const(inbuf, len);
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ndr_err = ndr_pull_struct_blob_all(&in, NULL, sid,
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(ndr_pull_flags_fn_t)ndr_pull_dom_sid);
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if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
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return false;
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}
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return true;
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}
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/*****************************************************************
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See if 2 SIDs are in the same domain
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this just compares the leading sub-auths
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*****************************************************************/
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int sid_compare_domain(const struct dom_sid *sid1, const struct dom_sid *sid2)
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{
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int n, i;
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n = MIN(sid1->num_auths, sid2->num_auths);
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for (i = n-1; i >= 0; --i)
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if (sid1->sub_auths[i] != sid2->sub_auths[i])
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return sid1->sub_auths[i] - sid2->sub_auths[i];
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return dom_sid_compare_auth(sid1, sid2);
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}
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/*****************************************************************
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Compare two sids.
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*****************************************************************/
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bool sid_equal(const struct dom_sid *sid1, const struct dom_sid *sid2)
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{
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return dom_sid_compare(sid1, sid2) == 0;
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}
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/********************************************************************
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Add SID to an array SIDs
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********************************************************************/
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NTSTATUS add_sid_to_array(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
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struct dom_sid **sids, uint32_t *num)
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{
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*sids = talloc_realloc(mem_ctx, *sids, struct dom_sid,
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(*num)+1);
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if (*sids == NULL) {
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*num = 0;
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return NT_STATUS_NO_MEMORY;
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}
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sid_copy(&((*sids)[*num]), sid);
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*num += 1;
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return NT_STATUS_OK;
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}
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/********************************************************************
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Add SID to an array SIDs ensuring that it is not already there
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********************************************************************/
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NTSTATUS add_sid_to_array_unique(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
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struct dom_sid **sids, uint32_t *num_sids)
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{
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size_t i;
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for (i=0; i<(*num_sids); i++) {
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if (dom_sid_compare(sid, &(*sids)[i]) == 0)
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return NT_STATUS_OK;
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}
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return add_sid_to_array(mem_ctx, sid, sids, num_sids);
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}
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/********************************************************************
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Remove SID from an array
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********************************************************************/
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void del_sid_from_array(const struct dom_sid *sid, struct dom_sid **sids, size_t *num)
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{
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struct dom_sid *sid_list = *sids;
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size_t i;
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for ( i=0; i<*num; i++ ) {
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/* if we find the SID, then decrement the count
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and break out of the loop */
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if ( sid_equal(sid, &sid_list[i]) ) {
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*num -= 1;
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break;
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}
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}
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/* This loop will copy the remainder of the array
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if i < num of sids ni the array */
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for ( ; i<*num; i++ )
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sid_copy( &sid_list[i], &sid_list[i+1] );
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return;
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}
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bool add_rid_to_array_unique(TALLOC_CTX *mem_ctx,
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uint32_t rid, uint32_t **pp_rids, size_t *p_num)
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{
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size_t i;
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for (i=0; i<*p_num; i++) {
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if ((*pp_rids)[i] == rid)
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return true;
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}
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*pp_rids = talloc_realloc(mem_ctx, *pp_rids, uint32_t, *p_num+1);
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if (*pp_rids == NULL) {
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*p_num = 0;
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return false;
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}
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(*pp_rids)[*p_num] = rid;
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*p_num += 1;
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return true;
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}
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bool is_null_sid(const struct dom_sid *sid)
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{
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static const struct dom_sid null_sid = {0};
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return sid_equal(sid, &null_sid);
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}
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