2 * Unix SMB/CIFS implementation.
3 * Group Policy Object Support
4 * Copyright (C) Wilco Baan Hofman 2010
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 "../libcli/security/dom_sid.h"
21 #include "../libcli/security/security_descriptor.h"
22 #include "../librpc/ndr/libndr.h"
23 #include "../lib/util/charset/charset.h"
24 #include "param/param.h"
25 #include "lib/policy/policy.h"
27 static uint32_t gp_ads_to_dir_access_mask(uint32_t access_mask)
31 /* Copy the standard access mask */
32 fs_mask = access_mask & 0x001F0000;
34 /* When READ_PROP and LIST_CONTENTS are set, read access is granted on the GPT */
35 if (access_mask & SEC_ADS_READ_PROP && access_mask & SEC_ADS_LIST) {
36 fs_mask |= SEC_STD_SYNCHRONIZE | SEC_DIR_LIST | SEC_DIR_READ_ATTRIBUTE |
37 SEC_DIR_READ_EA | SEC_DIR_TRAVERSE;
40 /* When WRITE_PROP is set, full write access is granted on the GPT */
41 if (access_mask & SEC_ADS_WRITE_PROP) {
42 fs_mask |= SEC_STD_SYNCHRONIZE | SEC_DIR_WRITE_ATTRIBUTE |
43 SEC_DIR_WRITE_EA | SEC_DIR_ADD_FILE |
47 /* Map CREATE_CHILD to add file and add subdir */
48 if (access_mask & SEC_ADS_CREATE_CHILD)
49 fs_mask |= SEC_DIR_ADD_FILE | SEC_DIR_ADD_SUBDIR;
51 /* Map ADS delete child to dir delete child */
52 if (access_mask & SEC_ADS_DELETE_CHILD)
53 fs_mask |= SEC_DIR_DELETE_CHILD;
58 NTSTATUS gp_create_gpt_security_descriptor (TALLOC_CTX *mem_ctx, struct security_descriptor *ds_sd, struct security_descriptor **ret)
60 struct security_descriptor *fs_sd;
63 /* Allocate the file system security descriptor */
64 fs_sd = talloc(mem_ctx, struct security_descriptor);
66 /* Copy the basic information from the directory server security descriptor */
67 fs_sd->owner_sid = talloc_memdup(fs_sd, ds_sd->owner_sid, sizeof(struct dom_sid));
68 fs_sd->group_sid = talloc_memdup(fs_sd, ds_sd->group_sid, sizeof(struct dom_sid));
69 fs_sd->type = ds_sd->type;
70 fs_sd->revision = ds_sd->revision;
73 fs_sd->sacl = security_acl_dup(fs_sd, ds_sd->sacl);
76 fs_sd->dacl = talloc_zero(fs_sd, struct security_acl);
78 for (i = 0; i < ds_sd->dacl->num_aces; i++) {
79 char *trustee = dom_sid_string(fs_sd, &ds_sd->dacl->aces[i].trustee);
80 struct security_ace *ace;
82 /* Don't add the allow for SID_BUILTIN_PREW2K */
83 if (!(ds_sd->dacl->aces[i].type & SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT) &&
84 strcmp(trustee, SID_BUILTIN_PREW2K) == 0) {
89 /* Copy the ace from the directory server security descriptor */
90 ace = talloc_memdup(fs_sd, &ds_sd->dacl->aces[i], sizeof(struct security_ace));
92 /* Set specific inheritance flags for within the GPO */
93 ace->flags |= SEC_ACE_FLAG_OBJECT_INHERIT | SEC_ACE_FLAG_CONTAINER_INHERIT;
94 if (strcmp(trustee, SID_CREATOR_OWNER) == 0) {
95 ace->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
98 /* Get a directory access mask from the assigned access mask on the LDAP object */
99 ace->access_mask = gp_ads_to_dir_access_mask(ace->access_mask);
101 /* Add the ace to the security descriptor DACL */
102 security_descriptor_dacl_add(fs_sd, ace);
104 /* Clean up the allocated data in this iteration */
105 talloc_free(trustee);
113 NTSTATUS gp_create_gpo (struct gp_context *gp_ctx, const char *display_name, struct gp_object **ret)
115 struct GUID guid_struct;
118 struct security_descriptor *sd;
120 struct gp_object *gpo;
123 /* Create a forked memory context, as a base for everything here */
124 mem_ctx = talloc_new(gp_ctx);
126 /* Create the gpo struct to return later */
127 gpo = talloc(gp_ctx, struct gp_object);
129 /* Generate a GUID */
130 guid_struct = GUID_random();
131 guid_str = GUID_string2(mem_ctx, &guid_struct);
132 name = strupper_talloc(mem_ctx, guid_str);
134 /* Prepare the GPO struct */
139 gpo->display_name = talloc_strdup(gpo, display_name);
140 gpo->file_sys_path = talloc_asprintf(gpo, "\\\\%s\\sysvol\\%s\\Policies\\%s", lp_dnsdomain(gp_ctx->lp_ctx), lp_dnsdomain(gp_ctx->lp_ctx), name);
143 status = gp_create_gpt(gp_ctx, name, gpo->file_sys_path);
144 if (!NT_STATUS_IS_OK(status)) {
145 DEBUG(0, ("Failed to create GPT\n"));
146 talloc_free(mem_ctx);
151 /* Create the LDAP GPO, including CN=User and CN=Machine */
152 status = gp_create_ldap_gpo(gp_ctx, gpo);
153 if (!NT_STATUS_IS_OK(status)) {
154 DEBUG(0, ("Failed to create LDAP group policy object\n"));
155 talloc_free(mem_ctx);
159 /* Get the new security descriptor */
160 status = gp_get_gpo_info(gp_ctx, gpo->dn, &gpo);
161 if (!NT_STATUS_IS_OK(status)) {
162 DEBUG(0, ("Failed to fetch LDAP group policy object\n"));
163 talloc_free(mem_ctx);
167 /* Create matching file and DS security descriptors */
168 status = gp_create_gpt_security_descriptor(mem_ctx, gpo->security_descriptor, &sd);
169 if (!NT_STATUS_IS_OK(status)) {
170 DEBUG(0, ("Failed to convert ADS security descriptor to filesystem security descriptor\n"));
171 talloc_free(mem_ctx);
175 /* Set the security descriptor on the filesystem for this GPO */
176 status = gp_set_gpt_security_descriptor(gp_ctx, gpo, sd);
177 if (!NT_STATUS_IS_OK(status)) {
178 DEBUG(0, ("Failed to set security descriptor (ACL) on the file system\n"));
179 talloc_free(mem_ctx);
183 talloc_free(mem_ctx);
189 NTSTATUS gp_set_acl (struct gp_context *gp_ctx, const char *dn_str, const struct security_descriptor *sd)
192 struct security_descriptor *fs_sd;
193 struct gp_object *gpo;
196 /* Create a forked memory context, as a base for everything here */
197 mem_ctx = talloc_new(gp_ctx);
199 /* Set the ACL on LDAP database */
200 status = gp_set_ads_acl(gp_ctx, dn_str, sd);
201 if (!NT_STATUS_IS_OK(status)) {
202 DEBUG(0, ("Failed to set ACL on ADS\n"));
203 talloc_free(mem_ctx);
207 /* Get the group policy object information, for filesystem location and merged sd */
208 status = gp_get_gpo_info(gp_ctx, dn_str, &gpo);
209 if (!NT_STATUS_IS_OK(status)) {
210 DEBUG(0, ("Failed to set ACL on ADS\n"));
211 talloc_free(mem_ctx);
215 /* Create matching file and DS security descriptors */
216 status = gp_create_gpt_security_descriptor(mem_ctx, gpo->security_descriptor, &fs_sd);
217 if (!NT_STATUS_IS_OK(status)) {
218 DEBUG(0, ("Failed to convert ADS security descriptor to filesystem security descriptor\n"));
219 talloc_free(mem_ctx);
223 /* Set the security descriptor on the filesystem for this GPO */
224 status = gp_set_gpt_security_descriptor(gp_ctx, gpo, fs_sd);
225 if (!NT_STATUS_IS_OK(status)) {
226 DEBUG(0, ("Failed to set security descriptor (ACL) on the file system\n"));
227 talloc_free(mem_ctx);
231 talloc_free(mem_ctx);