mirror of
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e23781b3b3
(This used to be commit 1e4ee728df
)
674 lines
18 KiB
C
674 lines
18 KiB
C
/*
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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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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 2 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, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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/*
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* Some useful sids
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*/
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const 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 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 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 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 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 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 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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const 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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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/*
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* An NT compatible anonymous token.
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*/
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static DOM_SID anon_sid_array[3] =
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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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{ 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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{ 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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NT_USER_TOKEN anonymous_token = { 3, anon_sid_array, SE_NONE };
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static 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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NT_USER_TOKEN system_token = { 1, system_sid_array, SE_ALL_PRIVS };
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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 SID_NAME_USE sid_type;
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const char *string;
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} sid_name_type[] = {
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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 SID_NAME_USE)0, NULL}
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};
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const char *sid_type_lookup(uint32 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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NT_USER_TOKEN *get_system_token(void)
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{
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return &system_token;
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}
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/******************************************************************
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get the default domain/netbios name to be used when dealing
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with our passdb list of accounts
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******************************************************************/
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const char *get_global_sam_name(void)
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{
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if ((lp_server_role() == ROLE_DOMAIN_PDC) || (lp_server_role() == ROLE_DOMAIN_BDC)) {
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return lp_workgroup();
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}
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return global_myname();
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}
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/*****************************************************************
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Convert a SID to an ascii string.
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*****************************************************************/
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char *sid_to_string(fstring sidstr_out, const DOM_SID *sid)
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{
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char subauth[16];
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int i;
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uint32 ia;
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if (!sid) {
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fstrcpy(sidstr_out, "(NULL SID)");
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return sidstr_out;
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}
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/*
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* BIG NOTE: this function only does SIDS where the identauth is not >= 2^32
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* in a range of 2^48.
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*/
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ia = (sid->id_auth[5]) +
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(sid->id_auth[4] << 8 ) +
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(sid->id_auth[3] << 16) +
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(sid->id_auth[2] << 24);
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slprintf(sidstr_out, sizeof(fstring) - 1, "S-%u-%lu", (unsigned int)sid->sid_rev_num, (unsigned long)ia);
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for (i = 0; i < sid->num_auths; i++) {
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slprintf(subauth, sizeof(subauth)-1, "-%lu", (unsigned long)sid->sub_auths[i]);
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fstrcat(sidstr_out, subauth);
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}
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return sidstr_out;
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}
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/*****************************************************************
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Useful function for debug lines.
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*****************************************************************/
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const char *sid_string_static(const DOM_SID *sid)
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{
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static fstring sid_str;
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sid_to_string(sid_str, sid);
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return sid_str;
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}
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/*****************************************************************
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Convert a string to a SID. Returns True on success, False on fail.
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*****************************************************************/
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BOOL string_to_sid(DOM_SID *sidout, const char *sidstr)
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{
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const char *p;
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char *q;
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/* BIG NOTE: this function only does SIDS where the identauth is not >= 2^32 */
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uint32 conv;
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if ((sidstr[0] != 'S' && sidstr[0] != 's') || sidstr[1] != '-') {
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DEBUG(3,("string_to_sid: Sid %s does not start with 'S-'.\n", sidstr));
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return False;
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}
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ZERO_STRUCTP(sidout);
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/* Get the revision number. */
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p = sidstr + 2;
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conv = (uint32) strtoul(p, &q, 10);
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if (!q || (*q != '-')) {
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DEBUG(3,("string_to_sid: Sid %s is not in a valid format.\n", sidstr));
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return False;
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}
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sidout->sid_rev_num = (uint8) conv;
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q++;
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/* get identauth */
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conv = (uint32) strtoul(q, &q, 10);
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if (!q || (*q != '-')) {
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DEBUG(0,("string_to_sid: Sid %s is not in a valid format.\n", sidstr));
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return False;
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}
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/* identauth in decimal should be < 2^32 */
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/* NOTE - the conv value is in big-endian format. */
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sidout->id_auth[0] = 0;
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sidout->id_auth[1] = 0;
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sidout->id_auth[2] = (conv & 0xff000000) >> 24;
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sidout->id_auth[3] = (conv & 0x00ff0000) >> 16;
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sidout->id_auth[4] = (conv & 0x0000ff00) >> 8;
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sidout->id_auth[5] = (conv & 0x000000ff);
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q++;
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sidout->num_auths = 0;
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for(conv = (uint32) strtoul(q, &q, 10);
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q && (*q =='-' || *q =='\0') && (sidout->num_auths < MAXSUBAUTHS);
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conv = (uint32) strtoul(q, &q, 10)) {
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sid_append_rid(sidout, conv);
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if (*q == '\0')
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break;
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q++;
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}
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return True;
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}
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DOM_SID *string_sid_talloc(TALLOC_CTX *mem_ctx, const char *sidstr)
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{
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DOM_SID *result = TALLOC_P(mem_ctx, DOM_SID);
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if (result == NULL)
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return NULL;
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if (!string_to_sid(result, sidstr))
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return NULL;
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return result;
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}
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/*****************************************************************
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Add a rid to the end of a sid
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*****************************************************************/
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BOOL sid_append_rid(DOM_SID *sid, uint32 rid)
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{
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if (sid->num_auths < MAXSUBAUTHS) {
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sid->sub_auths[sid->num_auths++] = rid;
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return True;
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}
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return False;
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}
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BOOL sid_compose(DOM_SID *dst, const DOM_SID *domain_sid, uint32 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(DOM_SID *sid, uint32 *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 DOM_SID *sid, uint32 *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 DOM_SID *exp_dom_sid, const DOM_SID *sid, uint32 *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(DOM_SID *dst, const 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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Write a sid out into on-the-wire format.
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*****************************************************************/
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BOOL sid_linearize(char *outbuf, size_t len, const DOM_SID *sid)
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{
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size_t i;
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if (len < sid_size(sid))
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return False;
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SCVAL(outbuf,0,sid->sid_rev_num);
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SCVAL(outbuf,1,sid->num_auths);
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memcpy(&outbuf[2], sid->id_auth, 6);
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for(i = 0; i < sid->num_auths; i++)
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SIVAL(outbuf, 8 + (i*4), sid->sub_auths[i]);
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return True;
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}
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/*****************************************************************
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Parse a on-the-wire SID to a DOM_SID.
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*****************************************************************/
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BOOL sid_parse(const char *inbuf, size_t len, DOM_SID *sid)
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{
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int i;
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if (len < 8)
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return False;
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ZERO_STRUCTP(sid);
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sid->sid_rev_num = CVAL(inbuf, 0);
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sid->num_auths = CVAL(inbuf, 1);
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memcpy(sid->id_auth, inbuf+2, 6);
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if (len < 8 + sid->num_auths*4)
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return False;
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for (i=0;i<sid->num_auths;i++)
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sid->sub_auths[i] = IVAL(inbuf, 8+i*4);
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return True;
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}
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/*****************************************************************
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Compare the auth portion of two sids.
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*****************************************************************/
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static int sid_compare_auth(const DOM_SID *sid1, const DOM_SID *sid2)
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{
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int i;
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if (sid1 == sid2)
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return 0;
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if (!sid1)
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return -1;
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if (!sid2)
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return 1;
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if (sid1->sid_rev_num != sid2->sid_rev_num)
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return sid1->sid_rev_num - sid2->sid_rev_num;
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for (i = 0; i < 6; i++)
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if (sid1->id_auth[i] != sid2->id_auth[i])
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return sid1->id_auth[i] - sid2->id_auth[i];
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return 0;
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}
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/*****************************************************************
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Compare two sids.
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*****************************************************************/
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int sid_compare(const DOM_SID *sid1, const DOM_SID *sid2)
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{
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int i;
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if (sid1 == sid2)
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return 0;
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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
|
|
********************************************************************/
|
|
|
|
void add_sid_to_array(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
|
|
DOM_SID **sids, size_t *num)
|
|
{
|
|
if (mem_ctx != NULL) {
|
|
*sids = TALLOC_REALLOC_ARRAY(mem_ctx, *sids, DOM_SID,
|
|
(*num)+1);
|
|
} else {
|
|
*sids = SMB_REALLOC_ARRAY(*sids, DOM_SID, (*num)+1);
|
|
}
|
|
|
|
if (*sids == NULL) {
|
|
return;
|
|
}
|
|
|
|
sid_copy(&((*sids)[*num]), sid);
|
|
*num += 1;
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/********************************************************************
|
|
Add SID to an array SIDs ensuring that it is not already there
|
|
********************************************************************/
|
|
|
|
void 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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
void 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;
|
|
}
|
|
|
|
*pp_rids = TALLOC_REALLOC_ARRAY(mem_ctx, *pp_rids, uint32, *p_num+1);
|
|
|
|
if (*pp_rids == NULL)
|
|
return;
|
|
|
|
(*pp_rids)[*p_num] = rid;
|
|
*p_num += 1;
|
|
}
|
|
|
|
BOOL is_null_sid(const DOM_SID *sid)
|
|
{
|
|
static const DOM_SID null_sid = {0};
|
|
return sid_equal(sid, &null_sid);
|
|
}
|