Line data Source code
1 : /*
2 : * Unix SMB/CIFS implementation.
3 : * Group Policy Object Support
4 : * Copyright (C) Wilco Baan Hofman 2010
5 : *
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.
10 : *
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.
15 : *
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/>.
18 : */
19 : #include "includes.h"
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"
26 :
27 0 : uint32_t gp_ads_to_dir_access_mask(uint32_t access_mask)
28 : {
29 : uint32_t fs_mask;
30 :
31 : /* Copy the standard access mask */
32 0 : fs_mask = access_mask & 0x001F0000;
33 :
34 : /* When READ_PROP and LIST_CONTENTS are set, read access is granted on the GPT */
35 0 : if (access_mask & SEC_ADS_READ_PROP && access_mask & SEC_ADS_LIST) {
36 0 : fs_mask |= SEC_STD_SYNCHRONIZE | SEC_DIR_LIST | SEC_DIR_READ_ATTRIBUTE |
37 : SEC_DIR_READ_EA | SEC_DIR_TRAVERSE;
38 : }
39 :
40 : /* When WRITE_PROP is set, full write access is granted on the GPT */
41 0 : if (access_mask & SEC_ADS_WRITE_PROP) {
42 0 : fs_mask |= SEC_STD_SYNCHRONIZE | SEC_DIR_WRITE_ATTRIBUTE |
43 : SEC_DIR_WRITE_EA | SEC_DIR_ADD_FILE |
44 : SEC_DIR_ADD_SUBDIR;
45 : }
46 :
47 : /* Map CREATE_CHILD to add file and add subdir */
48 0 : if (access_mask & SEC_ADS_CREATE_CHILD)
49 0 : fs_mask |= SEC_DIR_ADD_FILE | SEC_DIR_ADD_SUBDIR;
50 :
51 : /* Map ADS delete child to dir delete child */
52 0 : if (access_mask & SEC_ADS_DELETE_CHILD)
53 0 : fs_mask |= SEC_DIR_DELETE_CHILD;
54 :
55 0 : return fs_mask;
56 : }
57 :
58 0 : NTSTATUS gp_create_gpt_security_descriptor (TALLOC_CTX *mem_ctx, struct security_descriptor *ds_sd, struct security_descriptor **ret)
59 : {
60 : struct security_descriptor *fs_sd;
61 : NTSTATUS status;
62 : uint32_t i;
63 :
64 : /* Allocate the file system security descriptor */
65 0 : fs_sd = talloc(mem_ctx, struct security_descriptor);
66 0 : NT_STATUS_HAVE_NO_MEMORY(fs_sd);
67 :
68 : /* Copy the basic information from the directory server security descriptor */
69 0 : fs_sd->owner_sid = talloc_memdup(fs_sd, ds_sd->owner_sid, sizeof(struct dom_sid));
70 0 : if (fs_sd->owner_sid == NULL) {
71 0 : TALLOC_FREE(fs_sd);
72 0 : return NT_STATUS_NO_MEMORY;
73 : }
74 :
75 0 : fs_sd->group_sid = talloc_memdup(fs_sd, ds_sd->group_sid, sizeof(struct dom_sid));
76 0 : if (fs_sd->group_sid == NULL) {
77 0 : TALLOC_FREE(fs_sd);
78 0 : return NT_STATUS_NO_MEMORY;
79 : }
80 :
81 0 : fs_sd->type = ds_sd->type;
82 0 : fs_sd->revision = ds_sd->revision;
83 :
84 : /* Copy the sacl */
85 0 : fs_sd->sacl = security_acl_dup(fs_sd, ds_sd->sacl);
86 0 : if (fs_sd->sacl == NULL) {
87 0 : TALLOC_FREE(fs_sd);
88 0 : return NT_STATUS_NO_MEMORY;
89 : }
90 :
91 : /* Copy the dacl */
92 0 : fs_sd->dacl = talloc_zero(fs_sd, struct security_acl);
93 0 : if (fs_sd->dacl == NULL) {
94 0 : TALLOC_FREE(fs_sd);
95 0 : return NT_STATUS_NO_MEMORY;
96 : }
97 :
98 0 : for (i = 0; i < ds_sd->dacl->num_aces; i++) {
99 0 : char *trustee = dom_sid_string(fs_sd, &ds_sd->dacl->aces[i].trustee);
100 : struct security_ace *ace;
101 :
102 : /* Don't add the allow for SID_BUILTIN_PREW2K */
103 0 : if ((ds_sd->dacl->aces[i].type == SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT ||
104 0 : ds_sd->dacl->aces[i].type == SEC_ACE_TYPE_ACCESS_ALLOWED) &&
105 0 : strcmp(trustee, SID_BUILTIN_PREW2K) == 0) {
106 0 : talloc_free(trustee);
107 0 : continue;
108 : }
109 :
110 : /* Copy the ace from the directory server security descriptor */
111 0 : ace = talloc_memdup(fs_sd, &ds_sd->dacl->aces[i], sizeof(struct security_ace));
112 0 : if (ace == NULL) {
113 0 : TALLOC_FREE(fs_sd);
114 0 : return NT_STATUS_NO_MEMORY;
115 : }
116 :
117 : /* Set specific inheritance flags for within the GPO */
118 0 : ace->flags |= SEC_ACE_FLAG_OBJECT_INHERIT | SEC_ACE_FLAG_CONTAINER_INHERIT;
119 0 : if (strcmp(trustee, SID_CREATOR_OWNER) == 0) {
120 0 : ace->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
121 : }
122 :
123 : /* Get a directory access mask from the assigned access mask on the LDAP object */
124 0 : ace->access_mask = gp_ads_to_dir_access_mask(ace->access_mask);
125 :
126 : /* Add the ace to the security descriptor DACL */
127 0 : status = security_descriptor_dacl_add(fs_sd, ace);
128 0 : if (!NT_STATUS_IS_OK(status)) {
129 0 : DEBUG(0, ("Failed to add a dacl to file system security descriptor\n"));
130 0 : return status;
131 : }
132 :
133 : /* Clean up the allocated data in this iteration */
134 0 : talloc_free(trustee);
135 : }
136 :
137 0 : *ret = fs_sd;
138 0 : return NT_STATUS_OK;
139 : }
140 :
141 :
142 0 : NTSTATUS gp_create_gpo (struct gp_context *gp_ctx, const char *display_name, struct gp_object **ret)
143 : {
144 : struct GUID guid_struct;
145 : char *guid_str;
146 : char *name;
147 : struct security_descriptor *sd;
148 : TALLOC_CTX *mem_ctx;
149 : struct gp_object *gpo;
150 : NTSTATUS status;
151 :
152 : /* Create a forked memory context, as a base for everything here */
153 0 : mem_ctx = talloc_new(gp_ctx);
154 0 : NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
155 :
156 : /* Create the gpo struct to return later */
157 0 : gpo = talloc(gp_ctx, struct gp_object);
158 0 : if (gpo == NULL) {
159 0 : TALLOC_FREE(mem_ctx);
160 0 : return NT_STATUS_NO_MEMORY;
161 : }
162 :
163 : /* Generate a GUID */
164 0 : guid_struct = GUID_random();
165 0 : guid_str = GUID_string2(mem_ctx, &guid_struct);
166 0 : if (guid_str == NULL) {
167 0 : TALLOC_FREE(mem_ctx);
168 0 : return NT_STATUS_NO_MEMORY;
169 : }
170 0 : name = strupper_talloc(mem_ctx, guid_str);
171 0 : if (name == NULL) {
172 0 : TALLOC_FREE(mem_ctx);
173 0 : return NT_STATUS_NO_MEMORY;
174 : }
175 :
176 : /* Prepare the GPO struct */
177 0 : gpo->dn = NULL;
178 0 : gpo->name = name;
179 0 : gpo->flags = 0;
180 0 : gpo->version = 0;
181 0 : gpo->display_name = talloc_strdup(gpo, display_name);
182 0 : if (gpo->display_name == NULL) {
183 0 : TALLOC_FREE(mem_ctx);
184 0 : return NT_STATUS_NO_MEMORY;
185 : }
186 :
187 0 : gpo->file_sys_path = talloc_asprintf(gpo, "\\\\%s\\sysvol\\%s\\Policies\\%s", lpcfg_dnsdomain(gp_ctx->lp_ctx), lpcfg_dnsdomain(gp_ctx->lp_ctx), name);
188 0 : if (gpo->file_sys_path == NULL) {
189 0 : TALLOC_FREE(mem_ctx);
190 0 : return NT_STATUS_NO_MEMORY;
191 : }
192 :
193 : /* Create the GPT */
194 0 : status = gp_create_gpt(gp_ctx, name, gpo->file_sys_path);
195 0 : if (!NT_STATUS_IS_OK(status)) {
196 0 : DEBUG(0, ("Failed to create GPT\n"));
197 0 : talloc_free(mem_ctx);
198 0 : return status;
199 : }
200 :
201 :
202 : /* Create the LDAP GPO, including CN=User and CN=Machine */
203 0 : status = gp_create_ldap_gpo(gp_ctx, gpo);
204 0 : if (!NT_STATUS_IS_OK(status)) {
205 0 : DEBUG(0, ("Failed to create LDAP group policy object\n"));
206 0 : talloc_free(mem_ctx);
207 0 : return status;
208 : }
209 :
210 : /* Get the new security descriptor */
211 0 : status = gp_get_gpo_info(gp_ctx, gpo->dn, &gpo);
212 0 : if (!NT_STATUS_IS_OK(status)) {
213 0 : DEBUG(0, ("Failed to fetch LDAP group policy object\n"));
214 0 : talloc_free(mem_ctx);
215 0 : return status;
216 : }
217 :
218 : /* Create matching file and DS security descriptors */
219 0 : status = gp_create_gpt_security_descriptor(mem_ctx, gpo->security_descriptor, &sd);
220 0 : if (!NT_STATUS_IS_OK(status)) {
221 0 : DEBUG(0, ("Failed to convert ADS security descriptor to filesystem security descriptor\n"));
222 0 : talloc_free(mem_ctx);
223 0 : return status;
224 : }
225 :
226 : /* Set the security descriptor on the filesystem for this GPO */
227 0 : status = gp_set_gpt_security_descriptor(gp_ctx, gpo, sd);
228 0 : if (!NT_STATUS_IS_OK(status)) {
229 0 : DEBUG(0, ("Failed to set security descriptor (ACL) on the file system\n"));
230 0 : talloc_free(mem_ctx);
231 0 : return status;
232 : }
233 :
234 0 : talloc_free(mem_ctx);
235 :
236 0 : *ret = gpo;
237 0 : return NT_STATUS_OK;
238 : }
239 :
240 0 : NTSTATUS gp_set_acl (struct gp_context *gp_ctx, const char *dn_str, const struct security_descriptor *sd)
241 : {
242 : TALLOC_CTX *mem_ctx;
243 : struct security_descriptor *fs_sd;
244 : struct gp_object *gpo;
245 : NTSTATUS status;
246 :
247 : /* Create a forked memory context, as a base for everything here */
248 0 : mem_ctx = talloc_new(gp_ctx);
249 0 : NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
250 :
251 : /* Set the ACL on LDAP database */
252 0 : status = gp_set_ads_acl(gp_ctx, dn_str, sd);
253 0 : if (!NT_STATUS_IS_OK(status)) {
254 0 : DEBUG(0, ("Failed to set ACL on ADS\n"));
255 0 : talloc_free(mem_ctx);
256 0 : return status;
257 : }
258 :
259 : /* Get the group policy object information, for filesystem location and merged sd */
260 0 : status = gp_get_gpo_info(gp_ctx, dn_str, &gpo);
261 0 : if (!NT_STATUS_IS_OK(status)) {
262 0 : DEBUG(0, ("Failed to set ACL on ADS\n"));
263 0 : talloc_free(mem_ctx);
264 0 : return status;
265 : }
266 :
267 : /* Create matching file and DS security descriptors */
268 0 : status = gp_create_gpt_security_descriptor(mem_ctx, gpo->security_descriptor, &fs_sd);
269 0 : if (!NT_STATUS_IS_OK(status)) {
270 0 : DEBUG(0, ("Failed to convert ADS security descriptor to filesystem security descriptor\n"));
271 0 : talloc_free(mem_ctx);
272 0 : return status;
273 : }
274 :
275 : /* Set the security descriptor on the filesystem for this GPO */
276 0 : status = gp_set_gpt_security_descriptor(gp_ctx, gpo, fs_sd);
277 0 : if (!NT_STATUS_IS_OK(status)) {
278 0 : DEBUG(0, ("Failed to set security descriptor (ACL) on the file system\n"));
279 0 : talloc_free(mem_ctx);
280 0 : return status;
281 : }
282 :
283 0 : talloc_free(mem_ctx);
284 0 : return NT_STATUS_OK;
285 : }
286 :
287 0 : NTSTATUS gp_push_gpo (struct gp_context *gp_ctx, const char *local_path, struct gp_object *gpo)
288 : {
289 : NTSTATUS status;
290 : TALLOC_CTX *mem_ctx;
291 : struct gp_ini_context *ini;
292 : char *filename;
293 :
294 0 : mem_ctx = talloc_new(gp_ctx);
295 0 : NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
296 :
297 : /* Get version from ini file */
298 : /* FIXME: The local file system may be case sensitive */
299 0 : filename = talloc_asprintf(mem_ctx, "%s/%s", local_path, "GPT.INI");
300 0 : if (filename == NULL) {
301 0 : TALLOC_FREE(mem_ctx);
302 0 : return NT_STATUS_NO_MEMORY;
303 : }
304 0 : status = gp_parse_ini(mem_ctx, gp_ctx, local_path, &ini);
305 0 : if (!NT_STATUS_IS_OK(status)) {
306 0 : DEBUG(0, ("Failed to parse GPT.INI.\n"));
307 0 : talloc_free(mem_ctx);
308 0 : return status;
309 : }
310 :
311 : /* Push the GPT to the remote sysvol */
312 0 : status = gp_push_gpt(gp_ctx, local_path, gpo->file_sys_path);
313 0 : if (!NT_STATUS_IS_OK(status)) {
314 0 : DEBUG(0, ("Failed to push GPT to DC's sysvol share.\n"));
315 0 : talloc_free(mem_ctx);
316 0 : return status;
317 : }
318 :
319 : /* Write version to LDAP */
320 0 : status = gp_set_ldap_gpo(gp_ctx, gpo);
321 0 : if (!NT_STATUS_IS_OK(status)) {
322 0 : DEBUG(0, ("Failed to set GPO options in DC's LDAP.\n"));
323 0 : talloc_free(mem_ctx);
324 0 : return status;
325 : }
326 :
327 0 : talloc_free(mem_ctx);
328 0 : return NT_STATUS_OK;
329 : }
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