3740d4e4b577a249521a0f42e8007631e4de5052
[samba.git] / libgpo / gpo_fetch.c
1 /*
2  *  Unix SMB/CIFS implementation.
3  *  Group Policy Object Support
4  *  Copyright (C) Guenther Deschner 2005-2006
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
20 #include "includes.h"
21 #include "system/filesys.h"
22 #include "../libgpo/gpo.h"
23 #include "../libgpo/gpo_ini.h"
24
25 #include "libgpo/gpo_proto.h"
26 #include "libsmb/libsmb.h"
27
28 /****************************************************************
29  explode the GPO CIFS URI into their components
30 ****************************************************************/
31
32 NTSTATUS gpo_explode_filesyspath(TALLOC_CTX *mem_ctx,
33                                  const char *cache_dir,
34                                  const char *file_sys_path,
35                                  char **server,
36                                  char **service,
37                                  char **nt_path,
38                                  char **unix_path)
39 {
40         char *path = NULL;
41
42         *server = NULL;
43         *service = NULL;
44         *nt_path = NULL;
45         *unix_path = NULL;
46
47         if (!file_sys_path) {
48                 return NT_STATUS_OK;
49         }
50
51         if (!next_token_talloc(mem_ctx, &file_sys_path, server, "\\")) {
52                 return NT_STATUS_INVALID_PARAMETER;
53         }
54         NT_STATUS_HAVE_NO_MEMORY(*server);
55
56         if (!next_token_talloc(mem_ctx, &file_sys_path, service, "\\")) {
57                 return NT_STATUS_INVALID_PARAMETER;
58         }
59         NT_STATUS_HAVE_NO_MEMORY(*service);
60
61         if ((*nt_path = talloc_asprintf(mem_ctx, "\\%s", file_sys_path))
62                 == NULL) {
63                 return NT_STATUS_NO_MEMORY;
64         }
65         NT_STATUS_HAVE_NO_MEMORY(*nt_path);
66
67         if ((path = talloc_asprintf(mem_ctx,
68                                         "%s/%s",
69                                         cache_dir,
70                                         file_sys_path)) == NULL) {
71                 return NT_STATUS_NO_MEMORY;
72         }
73         path = talloc_string_sub(mem_ctx, path, "\\", "/");
74         if (!path) {
75                 return NT_STATUS_NO_MEMORY;
76         }
77
78         *unix_path = talloc_strdup(mem_ctx, path);
79         NT_STATUS_HAVE_NO_MEMORY(*unix_path);
80
81         talloc_free(path);
82         return NT_STATUS_OK;
83 }
84
85 /****************************************************************
86  prepare the local disc storage for "unix_path"
87 ****************************************************************/
88
89 static NTSTATUS gpo_prepare_local_store(TALLOC_CTX *mem_ctx,
90                                         const char *cache_dir,
91                                         const char *unix_path)
92 {
93         char *current_dir;
94         char *tok;
95
96         current_dir = talloc_strdup(mem_ctx, cache_dir);
97         NT_STATUS_HAVE_NO_MEMORY(current_dir);
98
99         if ((mkdir(cache_dir, 0644)) < 0 && errno != EEXIST) {
100                 return NT_STATUS_ACCESS_DENIED;
101         }
102
103         while (next_token_talloc(mem_ctx, &unix_path, &tok, "/")) {
104                 if (strequal(tok, GPO_CACHE_DIR)) {
105                         break;
106                 }
107         }
108
109         while (next_token_talloc(mem_ctx, &unix_path, &tok, "/")) {
110                 current_dir = talloc_asprintf_append_buffer(current_dir, "/%s", tok);
111                 NT_STATUS_HAVE_NO_MEMORY(current_dir);
112
113                 if ((mkdir(current_dir, 0644)) < 0 && errno != EEXIST) {
114                         return NT_STATUS_ACCESS_DENIED;
115                 }
116         }
117
118         return NT_STATUS_OK;
119 }
120
121 static NTSTATUS gpo_connect_server(ADS_STRUCT *ads,
122                                    const char *server, const char *service, void *ret_cli)
123 {
124         NTSTATUS result;
125         struct cli_state *cli;
126
127         result = cli_full_connection(&cli,
128                         lp_netbios_name(),
129                         server,
130                         NULL, 0,
131                         service, "A:",
132                         ads->auth.user_name, NULL,
133                         ads->auth.password,
134                         CLI_FULL_CONNECTION_USE_KERBEROS |
135                         CLI_FULL_CONNECTION_FALLBACK_AFTER_KERBEROS,
136                         SMB_SIGNING_REQUIRED);
137         if (!NT_STATUS_IS_OK(result)) {
138                 DEBUG(10,("check_refresh_gpo: "
139                                 "failed to connect: %s\n",
140                                 nt_errstr(result)));
141                 return result;
142         }
143         *(struct cli_state **) ret_cli = cli;
144         return NT_STATUS_OK;
145 }
146
147 /****************************************************************
148  download a full GPO via CIFS
149 ****************************************************************/
150
151 NTSTATUS gpo_fetch_files(TALLOC_CTX *mem_ctx,
152                          ADS_STRUCT *ads,
153                          const char *cache_dir,
154                          const struct GROUP_POLICY_OBJECT *gpo)
155 {
156         NTSTATUS result;
157         char *server, *service, *nt_path, *unix_path;
158         char *nt_ini_path, *unix_ini_path;
159         struct cli_state *cli = NULL;
160
161
162         result = gpo_explode_filesyspath(mem_ctx, cache_dir, gpo->file_sys_path,
163                                          &server, &service, &nt_path,
164                                          &unix_path);
165         NT_STATUS_NOT_OK_RETURN(result);
166
167         /* for now reuse the existing ds connection */
168
169         result = gpo_connect_server(ads, server, service, &cli);
170         NT_STATUS_NOT_OK_RETURN(result);
171
172         result = gpo_prepare_local_store(mem_ctx, cache_dir, unix_path);
173         NT_STATUS_NOT_OK_RETURN(result);
174
175         unix_ini_path = talloc_asprintf(mem_ctx, "%s/%s", unix_path, GPT_INI);
176         nt_ini_path = talloc_asprintf(mem_ctx, "%s\\%s", nt_path, GPT_INI);
177         NT_STATUS_HAVE_NO_MEMORY(unix_ini_path);
178         NT_STATUS_HAVE_NO_MEMORY(nt_ini_path);
179
180         result = gpo_copy_file(mem_ctx, cli, nt_ini_path, unix_ini_path);
181         NT_STATUS_NOT_OK_RETURN(result);
182
183         result = gpo_sync_directories(mem_ctx, cli, nt_path, unix_path);
184         NT_STATUS_NOT_OK_RETURN(result);
185
186         return NT_STATUS_OK;
187 }
188
189 /****************************************************************
190  get the locally stored gpt.ini version number
191 ****************************************************************/
192
193 NTSTATUS gpo_get_sysvol_gpt_version(TALLOC_CTX *mem_ctx,
194                                     const char *unix_path,
195                                     uint32_t *sysvol_version,
196                                     char **display_name)
197 {
198         NTSTATUS status;
199         uint32_t version = 0;
200         char *local_path = NULL;
201         char *name = NULL;
202
203         if (!unix_path) {
204                 return NT_STATUS_OK;
205         }
206
207         local_path = talloc_asprintf(mem_ctx, "%s/%s", unix_path, GPT_INI);
208         NT_STATUS_HAVE_NO_MEMORY(local_path);
209
210         status = parse_gpt_ini(mem_ctx, local_path, &version, &name);
211         if (!NT_STATUS_IS_OK(status)) {
212                 DEBUG(10,("gpo_get_sysvol_gpt_version: "
213                         "failed to parse ini [%s]: %s\n",
214                         local_path, nt_errstr(status)));
215                 return status;
216         }
217
218         if (sysvol_version) {
219                 *sysvol_version = version;
220         }
221
222         if (name && *display_name) {
223                 *display_name = talloc_strdup(mem_ctx, name);
224                 NT_STATUS_HAVE_NO_MEMORY(*display_name);
225         }
226
227         return NT_STATUS_OK;
228 }