source: branches/samba-3.2.x/source/auth/token_util.c@ 201

Last change on this file since 201 was 136, checked in by Paul Smedley, 18 years ago

Update trunk to 3.2.0rc1
File size: 14.0 KB
Line 
1/*
2 * Unix SMB/CIFS implementation.
3 * Authentication utility functions
4 * Copyright (C) Andrew Tridgell 1992-1998
5 * Copyright (C) Andrew Bartlett 2001
6 * Copyright (C) Jeremy Allison 2000-2001
7 * Copyright (C) Rafal Szczesniak 2002
8 * Copyright (C) Volker Lendecke 2006
9 * Copyright (C) Michael Adam 2007
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 3 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, see <http://www.gnu.org/licenses/>.
23 */
24
25/* functions moved from auth/auth_util.c to minimize linker deps */
26
27#include "includes.h"
28
29/****************************************************************************
30 Check for a SID in an NT_USER_TOKEN
31****************************************************************************/
32
33bool nt_token_check_sid ( const DOM_SID *sid, const NT_USER_TOKEN *token )
34{
35 int i;
36
37 if ( !sid || !token )
38 return False;
39
40 for ( i=0; i<token->num_sids; i++ ) {
41 if ( sid_equal( sid, &token->user_sids[i] ) )
42 return True;
43 }
44
45 return False;
46}
47
48bool nt_token_check_domain_rid( NT_USER_TOKEN *token, uint32 rid )
49{
50 DOM_SID domain_sid;
51
52 /* if we are a domain member, the get the domain SID, else for
53 a DC or standalone server, use our own SID */
54
55 if ( lp_server_role() == ROLE_DOMAIN_MEMBER ) {
56 if ( !secrets_fetch_domain_sid( lp_workgroup(),
57 &domain_sid ) ) {
58 DEBUG(1,("nt_token_check_domain_rid: Cannot lookup "
59 "SID for domain [%s]\n", lp_workgroup()));
60 return False;
61 }
62 }
63 else
64 sid_copy( &domain_sid, get_global_sam_sid() );
65
66 sid_append_rid( &domain_sid, rid );
67
68 return nt_token_check_sid( &domain_sid, token );\
69}
70
71/******************************************************************************
72 Create a token for the root user to be used internally by smbd.
73 This is similar to running under the context of the LOCAL_SYSTEM account
74 in Windows. This is a read-only token. Do not modify it or free() it.
75 Create a copy if your need to change it.
76******************************************************************************/
77
78NT_USER_TOKEN *get_root_nt_token( void )
79{
80 struct nt_user_token *token = NULL;
81 DOM_SID u_sid, g_sid;
82 struct passwd *pw;
83 void *cache_data;
84
85 cache_data = memcache_lookup_talloc(
86 NULL, SINGLETON_CACHE_TALLOC,
87 data_blob_string_const("root_nt_token"));
88
89 if (cache_data != NULL) {
90 return talloc_get_type_abort(
91 cache_data, struct nt_user_token);
92 }
93
94 if ( !(pw = sys_getpwnam( "root" )) ) {
95 DEBUG(0,("get_root_nt_token: getpwnam(\"root\") failed!\n"));
96 return NULL;
97 }
98
99 /* get the user and primary group SIDs; although the
100 BUILTIN\Administrators SId is really the one that matters here */
101
102 uid_to_sid(&u_sid, pw->pw_uid);
103 gid_to_sid(&g_sid, pw->pw_gid);
104
105 token = create_local_nt_token(NULL, &u_sid, False,
106 1, &global_sid_Builtin_Administrators);
107
108 token->privileges = se_disk_operators;
109
110 memcache_add_talloc(
111 NULL, SINGLETON_CACHE_TALLOC,
112 data_blob_string_const("root_nt_token"), token);
113
114 return token;
115}
116
117
118/*
119 * Add alias SIDs from memberships within the partially created token SID list
120 */
121
122NTSTATUS add_aliases(const DOM_SID *domain_sid,
123 struct nt_user_token *token)
124{
125 uint32 *aliases;
126 size_t i, num_aliases;
127 NTSTATUS status;
128 TALLOC_CTX *tmp_ctx;
129
130 if (!(tmp_ctx = talloc_init("add_aliases"))) {
131 return NT_STATUS_NO_MEMORY;
132 }
133
134 aliases = NULL;
135 num_aliases = 0;
136
137 status = pdb_enum_alias_memberships(tmp_ctx, domain_sid,
138 token->user_sids,
139 token->num_sids,
140 &aliases, &num_aliases);
141
142 if (!NT_STATUS_IS_OK(status)) {
143 DEBUG(10, ("pdb_enum_alias_memberships failed: %s\n",
144 nt_errstr(status)));
145 goto done;
146 }
147
148 for (i=0; i<num_aliases; i++) {
149 DOM_SID alias_sid;
150 sid_compose(&alias_sid, domain_sid, aliases[i]);
151 status = add_sid_to_array_unique(token, &alias_sid,
152 &token->user_sids,
153 &token->num_sids);
154 if (!NT_STATUS_IS_OK(status)) {
155 DEBUG(0, ("add_sid_to_array failed\n"));
156 goto done;
157 }
158 }
159
160done:
161 TALLOC_FREE(tmp_ctx);
162 return NT_STATUS_OK;
163}
164
165/*******************************************************************
166*******************************************************************/
167
168static NTSTATUS add_builtin_administrators( struct nt_user_token *token )
169{
170 DOM_SID domadm;
171 NTSTATUS status;
172
173 /* nothing to do if we aren't in a domain */
174
175 if ( !(IS_DC || lp_server_role()==ROLE_DOMAIN_MEMBER) ) {
176 return NT_STATUS_OK;
177 }
178
179 /* Find the Domain Admins SID */
180
181 if ( IS_DC ) {
182 sid_copy( &domadm, get_global_sam_sid() );
183 } else {
184 if ( !secrets_fetch_domain_sid( lp_workgroup(), &domadm ) )
185 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
186 }
187 sid_append_rid( &domadm, DOMAIN_GROUP_RID_ADMINS );
188
189 /* Add Administrators if the user beloongs to Domain Admins */
190
191 if ( nt_token_check_sid( &domadm, token ) ) {
192 status = add_sid_to_array(token,
193 &global_sid_Builtin_Administrators,
194 &token->user_sids, &token->num_sids);
195 if (!NT_STATUS_IS_OK(status)) {
196 return status;
197 }
198 }
199
200 return NT_STATUS_OK;
201}
202
203/*******************************************************************
204*******************************************************************/
205
206static NTSTATUS create_builtin_users( void )
207{
208 NTSTATUS status;
209 DOM_SID dom_users;
210
211 status = pdb_create_builtin_alias( BUILTIN_ALIAS_RID_USERS );
212 if ( !NT_STATUS_IS_OK(status) ) {
213 DEBUG(5,("create_builtin_users: Failed to create Users\n"));
214 return status;
215 }
216
217 /* add domain users */
218 if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
219 && secrets_fetch_domain_sid(lp_workgroup(), &dom_users))
220 {
221 sid_append_rid(&dom_users, DOMAIN_GROUP_RID_USERS );
222 status = pdb_add_aliasmem( &global_sid_Builtin_Users, &dom_users);
223 if ( !NT_STATUS_IS_OK(status) ) {
224 DEBUG(4,("create_builtin_administrators: Failed to add Domain Users to"
225 " Users\n"));
226 return status;
227 }
228 }
229
230 return NT_STATUS_OK;
231}
232
233/*******************************************************************
234*******************************************************************/
235
236static NTSTATUS create_builtin_administrators( void )
237{
238 NTSTATUS status;
239 DOM_SID dom_admins, root_sid;
240 fstring root_name;
241 enum lsa_SidType type;
242 TALLOC_CTX *ctx;
243 bool ret;
244
245 status = pdb_create_builtin_alias( BUILTIN_ALIAS_RID_ADMINS );
246 if ( !NT_STATUS_IS_OK(status) ) {
247 DEBUG(5,("create_builtin_administrators: Failed to create Administrators\n"));
248 return status;
249 }
250
251 /* add domain admins */
252 if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
253 && secrets_fetch_domain_sid(lp_workgroup(), &dom_admins))
254 {
255 sid_append_rid(&dom_admins, DOMAIN_GROUP_RID_ADMINS);
256 status = pdb_add_aliasmem( &global_sid_Builtin_Administrators, &dom_admins );
257 if ( !NT_STATUS_IS_OK(status) ) {
258 DEBUG(4,("create_builtin_administrators: Failed to add Domain Admins"
259 " Administrators\n"));
260 return status;
261 }