1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
|
/*
* Unix SMB/CIFS implementation.
* Group Policy Object Support
* Copyright (C) Wilco Baan Hofman 2010
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "../libcli/security/dom_sid.h"
#include "../libcli/security/security_descriptor.h"
#include "../librpc/ndr/libndr.h"
#include "../lib/util/charset/charset.h"
#include "param/param.h"
#include "lib/policy/policy.h"
static uint32_t gp_ads_to_dir_access_mask(uint32_t access_mask)
{
uint32_t fs_mask;
/* Copy the standard access mask */
fs_mask = access_mask & 0x001F0000;
/* When READ_PROP and LIST_CONTENTS are set, read access is granted on the GPT */
if (access_mask & SEC_ADS_READ_PROP && access_mask & SEC_ADS_LIST) {
fs_mask |= SEC_STD_SYNCHRONIZE | SEC_DIR_LIST | SEC_DIR_READ_ATTRIBUTE |
SEC_DIR_READ_EA | SEC_DIR_TRAVERSE;
}
/* When WRITE_PROP is set, full write access is granted on the GPT */
if (access_mask & SEC_ADS_WRITE_PROP) {
fs_mask |= SEC_STD_SYNCHRONIZE | SEC_DIR_WRITE_ATTRIBUTE |
SEC_DIR_WRITE_EA | SEC_DIR_ADD_FILE |
SEC_DIR_ADD_SUBDIR;
}
/* Map CREATE_CHILD to add file and add subdir */
if (access_mask & SEC_ADS_CREATE_CHILD)
fs_mask |= SEC_DIR_ADD_FILE | SEC_DIR_ADD_SUBDIR;
/* Map ADS delete child to dir delete child */
if (access_mask & SEC_ADS_DELETE_CHILD)
fs_mask |= SEC_DIR_DELETE_CHILD;
return fs_mask;
}
NTSTATUS gp_create_gpt_security_descriptor (TALLOC_CTX *mem_ctx, struct security_descriptor *ds_sd, struct security_descriptor **ret)
{
struct security_descriptor *fs_sd;
NTSTATUS status;
uint32_t i;
/* Allocate the file system security descriptor */
fs_sd = talloc(mem_ctx, struct security_descriptor);
NT_STATUS_HAVE_NO_MEMORY(fs_sd);
/* Copy the basic information from the directory server security descriptor */
fs_sd->owner_sid = talloc_memdup(fs_sd, ds_sd->owner_sid, sizeof(struct dom_sid));
NT_STATUS_HAVE_NO_MEMORY_AND_FREE(fs_sd->owner_sid, fs_sd);
fs_sd->group_sid = talloc_memdup(fs_sd, ds_sd->group_sid, sizeof(struct dom_sid));
NT_STATUS_HAVE_NO_MEMORY_AND_FREE(fs_sd->group_sid, fs_sd);
fs_sd->type = ds_sd->type;
fs_sd->revision = ds_sd->revision;
/* Copy the sacl */
fs_sd->sacl = security_acl_dup(fs_sd, ds_sd->sacl);
NT_STATUS_HAVE_NO_MEMORY_AND_FREE(fs_sd->sacl, fs_sd);
/* Copy the dacl */
fs_sd->dacl = talloc_zero(fs_sd, struct security_acl);
NT_STATUS_HAVE_NO_MEMORY_AND_FREE(fs_sd->dacl, fs_sd);
for (i = 0; i < ds_sd->dacl->num_aces; i++) {
char *trustee = dom_sid_string(fs_sd, &ds_sd->dacl->aces[i].trustee);
struct security_ace *ace;
/* Don't add the allow for SID_BUILTIN_PREW2K */
if (!(ds_sd->dacl->aces[i].type & SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT) &&
strcmp(trustee, SID_BUILTIN_PREW2K) == 0) {
talloc_free(trustee);
continue;
}
/* Copy the ace from the directory server security descriptor */
ace = talloc_memdup(fs_sd, &ds_sd->dacl->aces[i], sizeof(struct security_ace));
NT_STATUS_HAVE_NO_MEMORY_AND_FREE(ace, fs_sd);
/* Set specific inheritance flags for within the GPO */
ace->flags |= SEC_ACE_FLAG_OBJECT_INHERIT | SEC_ACE_FLAG_CONTAINER_INHERIT;
if (strcmp(trustee, SID_CREATOR_OWNER) == 0) {
ace->flags |= SEC_ACE_FLAG_INHERIT_ONLY;
}
/* Get a directory access mask from the assigned access mask on the LDAP object */
ace->access_mask = gp_ads_to_dir_access_mask(ace->access_mask);
/* Add the ace to the security descriptor DACL */
status = security_descriptor_dacl_add(fs_sd, ace);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to add a dacl to file system security descriptor\n"));
return status;
}
/* Clean up the allocated data in this iteration */
talloc_free(trustee);
}
*ret = fs_sd;
return NT_STATUS_OK;
}
NTSTATUS gp_create_gpo (struct gp_context *gp_ctx, const char *display_name, struct gp_object **ret)
{
struct GUID guid_struct;
char *guid_str;
char *name;
struct security_descriptor *sd;
TALLOC_CTX *mem_ctx;
struct gp_object *gpo;
NTSTATUS status;
/* Create a forked memory context, as a base for everything here */
mem_ctx = talloc_new(gp_ctx);
NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
/* Create the gpo struct to return later */
gpo = talloc(gp_ctx, struct gp_object);
NT_STATUS_HAVE_NO_MEMORY_AND_FREE(gpo, mem_ctx);
/* Generate a GUID */
guid_struct = GUID_random();
guid_str = GUID_string2(mem_ctx, &guid_struct);
NT_STATUS_HAVE_NO_MEMORY_AND_FREE(guid_str, mem_ctx);
name = strupper_talloc(mem_ctx, guid_str);
NT_STATUS_HAVE_NO_MEMORY_AND_FREE(name, mem_ctx);
/* Prepare the GPO struct */
gpo->dn = NULL;
gpo->name = name;
gpo->flags = 0;
gpo->version = 0;
gpo->display_name = talloc_strdup(gpo, display_name);
NT_STATUS_HAVE_NO_MEMORY_AND_FREE(gpo->display_name, mem_ctx);
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);
NT_STATUS_HAVE_NO_MEMORY_AND_FREE(gpo->file_sys_path, mem_ctx);
/* Create the GPT */
status = gp_create_gpt(gp_ctx, name, gpo->file_sys_path);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to create GPT\n"));
talloc_free(mem_ctx);
return status;
}
/* Create the LDAP GPO, including CN=User and CN=Machine */
status = gp_create_ldap_gpo(gp_ctx, gpo);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to create LDAP group policy object\n"));
talloc_free(mem_ctx);
return status;
}
/* Get the new security descriptor */
status = gp_get_gpo_info(gp_ctx, gpo->dn, &gpo);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to fetch LDAP group policy object\n"));
talloc_free(mem_ctx);
return status;
}
/* Create matching file and DS security descriptors */
status = gp_create_gpt_security_descriptor(mem_ctx, gpo->security_descriptor, &sd);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to convert ADS security descriptor to filesystem security descriptor\n"));
talloc_free(mem_ctx);
return status;
}
/* Set the security descriptor on the filesystem for this GPO */
status = gp_set_gpt_security_descriptor(gp_ctx, gpo, sd);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to set security descriptor (ACL) on the file system\n"));
talloc_free(mem_ctx);
return status;
}
talloc_free(mem_ctx);
*ret = gpo;
return NT_STATUS_OK;
}
NTSTATUS gp_set_acl (struct gp_context *gp_ctx, const char *dn_str, const struct security_descriptor *sd)
{
TALLOC_CTX *mem_ctx;
struct security_descriptor *fs_sd;
struct gp_object *gpo;
NTSTATUS status;
/* Create a forked memory context, as a base for everything here */
mem_ctx = talloc_new(gp_ctx);
NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
/* Set the ACL on LDAP database */
status = gp_set_ads_acl(gp_ctx, dn_str, sd);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to set ACL on ADS\n"));
talloc_free(mem_ctx);
return status;
}
/* Get the group policy object information, for filesystem location and merged sd */
status = gp_get_gpo_info(gp_ctx, dn_str, &gpo);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to set ACL on ADS\n"));
talloc_free(mem_ctx);
return status;
}
/* Create matching file and DS security descriptors */
status = gp_create_gpt_security_descriptor(mem_ctx, gpo->security_descriptor, &fs_sd);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to convert ADS security descriptor to filesystem security descriptor\n"));
talloc_free(mem_ctx);
return status;
}
/* Set the security descriptor on the filesystem for this GPO */
status = gp_set_gpt_security_descriptor(gp_ctx, gpo, fs_sd);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to set security descriptor (ACL) on the file system\n"));
talloc_free(mem_ctx);
return status;
}
talloc_free(mem_ctx);
return NT_STATUS_OK;
}
NTSTATUS gp_push_gpo (struct gp_context *gp_ctx, const char *local_path, struct gp_object *gpo)
{
NTSTATUS status;
TALLOC_CTX *mem_ctx;
struct gp_ini_context *ini;
char *filename;
mem_ctx = talloc_new(gp_ctx);
NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
/* Get version from ini file */
/* FIXME: The local file system may be case sensitive */
filename = talloc_asprintf(mem_ctx, "%s/%s", local_path, "GPT.INI");
NT_STATUS_HAVE_NO_MEMORY_AND_FREE(filename, mem_ctx);
status = gp_parse_ini(mem_ctx, gp_ctx, local_path, &ini);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to parse GPT.INI.\n"));
talloc_free(mem_ctx);
return status;
}
/* Push the GPT to the remote sysvol */
status = gp_push_gpt(gp_ctx, local_path, gpo->file_sys_path);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to push GPT to DC's sysvol share.\n"));
talloc_free(mem_ctx);
return status;
}
/* Write version to LDAP */
status = gp_set_ldap_gpo(gp_ctx, gpo);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to set GPO options in DC's LDAP.\n"));
talloc_free(mem_ctx);
return status;
}
talloc_free(mem_ctx);
return NT_STATUS_OK;
}
|
