s3-utils: net - Fix one error/usage message
[Samba/gebeck_regimport.git] / libgpo / gpo_sec.c
blob456a218e1981c41ce3026abc13b3b49a9b0d138b
1 /*
2 * Unix SMB/CIFS implementation.
3 * Group Policy Object Support
4 * Copyright (C) Guenther Deschner 2007
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
20 #include "includes.h"
21 #include "libcli/security/security.h"
22 #include "../libgpo/gpo.h"
23 #include "auth.h"
24 #include "../librpc/ndr/libndr.h"
26 /****************************************************************
27 ****************************************************************/
29 static bool gpo_sd_check_agp_object_guid(const struct security_ace_object *object)
31 struct GUID ext_right_apg_guid;
32 NTSTATUS status;
34 if (!object) {
35 return false;
38 status = GUID_from_string(ADS_EXTENDED_RIGHT_APPLY_GROUP_POLICY,
39 &ext_right_apg_guid);
40 if (!NT_STATUS_IS_OK(status)) {
41 return false;
44 switch (object->flags) {
45 case SEC_ACE_OBJECT_TYPE_PRESENT:
46 if (GUID_equal(&object->type.type,
47 &ext_right_apg_guid)) {
48 return true;
50 case SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT:
51 if (GUID_equal(&object->inherited_type.inherited_type,
52 &ext_right_apg_guid)) {
53 return true;
55 default:
56 break;
59 return false;
62 /****************************************************************
63 ****************************************************************/
65 static bool gpo_sd_check_agp_object(const struct security_ace *ace)
67 if (!sec_ace_object(ace->type)) {
68 return false;
71 return gpo_sd_check_agp_object_guid(&ace->object.object);
74 /****************************************************************
75 ****************************************************************/
77 static bool gpo_sd_check_agp_access_bits(uint32_t access_mask)
79 return (access_mask & SEC_ADS_CONTROL_ACCESS);
82 #if 0
83 /****************************************************************
84 ****************************************************************/
86 static bool gpo_sd_check_read_access_bits(uint32_t access_mask)
88 uint32_t read_bits = SEC_RIGHTS_LIST_CONTENTS |
89 SEC_RIGHTS_READ_ALL_PROP |
90 SEC_RIGHTS_READ_PERMS;
92 return (read_bits == (access_mask & read_bits));
94 #endif
96 /****************************************************************
97 ****************************************************************/
99 static NTSTATUS gpo_sd_check_ace_denied_object(const struct security_ace *ace,
100 const struct security_token *token)
102 char *sid_str;
104 if (gpo_sd_check_agp_object(ace) &&
105 gpo_sd_check_agp_access_bits(ace->access_mask) &&
106 security_token_has_sid(token, &ace->trustee)) {
107 sid_str = dom_sid_string(NULL, &ace->trustee);
108 DEBUG(10,("gpo_sd_check_ace_denied_object: "
109 "Access denied as of ace for %s\n",
110 sid_str));
111 talloc_free(sid_str);
112 return NT_STATUS_ACCESS_DENIED;
115 return STATUS_MORE_ENTRIES;
118 /****************************************************************
119 ****************************************************************/
121 static NTSTATUS gpo_sd_check_ace_allowed_object(const struct security_ace *ace,
122 const struct security_token *token)
124 char *sid_str;
126 if (gpo_sd_check_agp_object(ace) &&
127 gpo_sd_check_agp_access_bits(ace->access_mask) &&
128 security_token_has_sid(token, &ace->trustee)) {
129 sid_str = dom_sid_string(NULL, &ace->trustee);
130 DEBUG(10,("gpo_sd_check_ace_allowed_object: "
131 "Access granted as of ace for %s\n",
132 sid_str));
133 talloc_free(sid_str);
135 return NT_STATUS_OK;
138 return STATUS_MORE_ENTRIES;
141 /****************************************************************
142 ****************************************************************/
144 static NTSTATUS gpo_sd_check_ace(const struct security_ace *ace,
145 const struct security_token *token)
147 switch (ace->type) {
148 case SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
149 return gpo_sd_check_ace_denied_object(ace, token);
150 case SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
151 return gpo_sd_check_ace_allowed_object(ace, token);
152 default:
153 return STATUS_MORE_ENTRIES;
157 /****************************************************************
158 ****************************************************************/
160 NTSTATUS gpo_apply_security_filtering(const struct GROUP_POLICY_OBJECT *gpo,
161 const struct security_token *token)
163 struct security_descriptor *sd = gpo->security_descriptor;
164 struct security_acl *dacl = NULL;
165 NTSTATUS status = NT_STATUS_ACCESS_DENIED;
166 int i;
168 if (!token) {
169 return NT_STATUS_INVALID_USER_BUFFER;
172 if (!sd) {
173 return NT_STATUS_INVALID_SECURITY_DESCR;
176 dacl = sd->dacl;
177 if (!dacl) {
178 return NT_STATUS_INVALID_SECURITY_DESCR;
181 /* check all aces and only return NT_STATUS_OK (== Access granted) or
182 * NT_STATUS_ACCESS_DENIED ( == Access denied) - the default is to
183 * deny access */
185 for (i = 0; i < dacl->num_aces; i ++) {
187 status = gpo_sd_check_ace(&dacl->aces[i], token);
189 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
190 return status;
191 } else if (NT_STATUS_IS_OK(status)) {
192 return status;
195 continue;
198 return NT_STATUS_ACCESS_DENIED;