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/>.
21 #include "libcli/security/security.h"
22 #include "../libgpo/gpo.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;
38 status = GUID_from_string(ADS_EXTENDED_RIGHT_APPLY_GROUP_POLICY,
40 if (!NT_STATUS_IS_OK(status)) {
44 switch (object->flags) {
45 case SEC_ACE_OBJECT_TYPE_PRESENT:
46 if (GUID_equal(&object->type.type,
47 &ext_right_apg_guid)) {
52 case SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT:
53 if (GUID_equal(&object->inherited_type.inherited_type,
54 &ext_right_apg_guid)) {
66 /****************************************************************
67 ****************************************************************/
69 static bool gpo_sd_check_agp_object(const struct security_ace *ace)
71 if (!sec_ace_object(ace->type)) {
75 return gpo_sd_check_agp_object_guid(&ace->object.object);
78 /****************************************************************
79 ****************************************************************/
81 static bool gpo_sd_check_agp_access_bits(uint32_t access_mask)
83 return (access_mask & SEC_ADS_CONTROL_ACCESS);
87 /****************************************************************
88 ****************************************************************/
90 static bool gpo_sd_check_read_access_bits(uint32_t access_mask)
92 uint32_t read_bits = SEC_RIGHTS_LIST_CONTENTS |
93 SEC_RIGHTS_READ_ALL_PROP |
94 SEC_RIGHTS_READ_PERMS;
96 return (read_bits == (access_mask & read_bits));
100 /****************************************************************
101 ****************************************************************/
103 static NTSTATUS gpo_sd_check_ace_denied_object(const struct security_ace *ace,
104 const struct security_token *token)
108 if (gpo_sd_check_agp_object(ace) &&
109 gpo_sd_check_agp_access_bits(ace->access_mask) &&
110 security_token_has_sid(token, &ace->trustee)) {
111 sid_str = dom_sid_string(NULL, &ace->trustee);
112 DEBUG(10,("gpo_sd_check_ace_denied_object: "
113 "Access denied as of ace for %s\n",
115 talloc_free(sid_str);
116 return NT_STATUS_ACCESS_DENIED;
119 return STATUS_MORE_ENTRIES;
122 /****************************************************************
123 ****************************************************************/
125 static NTSTATUS gpo_sd_check_ace_allowed_object(const struct security_ace *ace,
126 const struct security_token *token)
130 if (gpo_sd_check_agp_object(ace) &&
131 gpo_sd_check_agp_access_bits(ace->access_mask) &&
132 security_token_has_sid(token, &ace->trustee)) {
133 sid_str = dom_sid_string(NULL, &ace->trustee);
134 DEBUG(10,("gpo_sd_check_ace_allowed_object: "
135 "Access granted as of ace for %s\n",
137 talloc_free(sid_str);
142 return STATUS_MORE_ENTRIES;
145 /****************************************************************
146 ****************************************************************/
148 static NTSTATUS gpo_sd_check_ace(const struct security_ace *ace,
149 const struct security_token *token)
152 case SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
153 return gpo_sd_check_ace_denied_object(ace, token);
154 case SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
155 return gpo_sd_check_ace_allowed_object(ace, token);
157 return STATUS_MORE_ENTRIES;
161 /****************************************************************
162 ****************************************************************/
164 NTSTATUS gpo_apply_security_filtering(const struct GROUP_POLICY_OBJECT *gpo,
165 const struct security_token *token)
167 struct security_descriptor *sd = gpo->security_descriptor;
168 struct security_acl *dacl = NULL;
169 NTSTATUS status = NT_STATUS_ACCESS_DENIED;
173 return NT_STATUS_INVALID_USER_BUFFER;
177 return NT_STATUS_INVALID_SECURITY_DESCR;
182 return NT_STATUS_INVALID_SECURITY_DESCR;
185 /* check all aces and only return NT_STATUS_OK (== Access granted) or
186 * NT_STATUS_ACCESS_DENIED ( == Access denied) - the default is to
189 for (i = 0; i < dacl->num_aces; i ++) {
191 status = gpo_sd_check_ace(&dacl->aces[i], token);
193 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
195 } else if (NT_STATUS_IS_OK(status)) {
202 return NT_STATUS_ACCESS_DENIED;