1/* $Id: port-solaris.c,v 1.4 2010/11/05 01:03:05 dtucker Exp $ */
2
3/*
4 * Copyright (c) 2006 Chad Mynhier.
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include "config.h"
20#include "includes.h"
21
22#ifdef USE_SOLARIS_PROCESS_CONTRACTS
23
24#include <sys/types.h>
25#include <sys/stat.h>
26#include <sys/param.h>
27
28#include <errno.h>
29#ifdef HAVE_FCNTL_H
30# include <fcntl.h>
31#endif
32#include <stdarg.h>
33#include <string.h>
34#include <unistd.h>
35
36#include <libcontract.h>
37#include <sys/contract/process.h>
38#include <sys/ctfs.h>
39
40#include "log.h"
41
42#define CT_TEMPLATE CTFS_ROOT "/process/template"
43#define CT_LATEST CTFS_ROOT "/process/latest"
44
45static int tmpl_fd = -1;
46
47/* Lookup the latest process contract */
48static ctid_t
49get_active_process_contract_id(void)
50{
51 int stat_fd;
52 ctid_t ctid = -1;
53 ct_stathdl_t stathdl;
54
55 if ((stat_fd = open64(CT_LATEST, O_RDONLY)) == -1) {
56 error("%s: Error opening 'latest' process "
57 "contract: %s", __func__, strerror(errno));
58 return -1;
59 }
60 if (ct_status_read(stat_fd, CTD_COMMON, &stathdl) != 0) {
61 error("%s: Error reading process contract "
62 "status: %s", __func__, strerror(errno));
63 goto out;
64 }
65 if ((ctid = ct_status_get_id(stathdl)) < 0) {
66 error("%s: Error getting process contract id: %s",
67 __func__, strerror(errno));
68 goto out;
69 }
70
71 ct_status_free(stathdl);
72 out:
73 close(stat_fd);
74 return ctid;
75}
76
77void
78solaris_contract_pre_fork(void)
79{
80 if ((tmpl_fd = open64(CT_TEMPLATE, O_RDWR)) == -1) {
81 error("%s: open %s: %s", __func__,
82 CT_TEMPLATE, strerror(errno));
83 return;
84 }
85
86 debug2("%s: setting up process contract template on fd %d",
87 __func__, tmpl_fd);
88
89 /* First we set the template parameters and event sets. */
90 if (ct_pr_tmpl_set_param(tmpl_fd, CT_PR_PGRPONLY) != 0) {
91 error("%s: Error setting process contract parameter set "
92 "(pgrponly): %s", __func__, strerror(errno));
93 goto fail;
94 }
95 if (ct_pr_tmpl_set_fatal(tmpl_fd, CT_PR_EV_HWERR) != 0) {
96 error("%s: Error setting process contract template "
97 "fatal events: %s", __func__, strerror(errno));
98 goto fail;
99 }
100 if (ct_tmpl_set_critical(tmpl_fd, 0) != 0) {
101 error("%s: Error setting process contract template "
102 "critical events: %s", __func__, strerror(errno));
103 goto fail;
104 }
105 if (ct_tmpl_set_informative(tmpl_fd, CT_PR_EV_HWERR) != 0) {
106 error("%s: Error setting process contract template "
107 "informative events: %s", __func__, strerror(errno));
108 goto fail;
109 }
110
111 /* Now make this the active template for this process. */
112 if (ct_tmpl_activate(tmpl_fd) != 0) {
113 error("%s: Error activating process contract "
114 "template: %s", __func__, strerror(errno));
115 goto fail;
116 }
117 return;
118
119 fail:
120 if (tmpl_fd != -1) {
121 close(tmpl_fd);
122 tmpl_fd = -1;
123 }
124}
125
126void
127solaris_contract_post_fork_child()
128{
129 debug2("%s: clearing process contract template on fd %d",
130 __func__, tmpl_fd);
131
132 /* Clear the active template. */
133 if (ct_tmpl_clear(tmpl_fd) != 0)
134 error("%s: Error clearing active process contract "
135 "template: %s", __func__, strerror(errno));
136
137 close(tmpl_fd);
138 tmpl_fd = -1;
139}
140
141void
142solaris_contract_post_fork_parent(pid_t pid)
143{
144 ctid_t ctid;
145 char ctl_path[256];
146 int r, ctl_fd = -1, stat_fd = -1;
147
148 debug2("%s: clearing template (fd %d)", __func__, tmpl_fd);
149
150 if (tmpl_fd == -1)
151 return;
152
153 /* First clear the active template. */
154 if ((r = ct_tmpl_clear(tmpl_fd)) != 0)
155 error("%s: Error clearing active process contract "
156 "template: %s", __func__, strerror(errno));
157
158 close(tmpl_fd);
159 tmpl_fd = -1;
160
161 /*
162 * If either the fork didn't succeed (pid < 0), or clearing
163 * th active contract failed (r != 0), then we have nothing
164 * more do.
165 */
166 if (r != 0 || pid <= 0)
167 return;
168
169 /* Now lookup and abandon the contract we've created. */
170 ctid = get_active_process_contract_id();
171
172 debug2("%s: abandoning contract id %ld", __func__, ctid);
173
174 snprintf(ctl_path, sizeof(ctl_path),
175 CTFS_ROOT "/process/%ld/ctl", ctid);
176 if ((ctl_fd = open64(ctl_path, O_WRONLY)) < 0) {
177 error("%s: Error opening process contract "
178 "ctl file: %s", __func__, strerror(errno));
179 goto fail;
180 }
181 if (ct_ctl_abandon(ctl_fd) < 0) {
182 error("%s: Error abandoning process contract: %s",
183 __func__, strerror(errno));
184 goto fail;
185 }
186 close(ctl_fd);
187 return;
188
189 fail:
190 if (tmpl_fd != -1) {
191 close(tmpl_fd);
192 tmpl_fd = -1;
193 }
194 if (stat_fd != -1)
195 close(stat_fd);
196 if (ctl_fd != -1)
197 close(ctl_fd);
198}
199#endif
200
201#ifdef USE_SOLARIS_PROJECTS
202#include <sys/task.h>
203#include <project.h>
204
205/*
206 * Get/set solaris default project.
207 * If we fail, just run along gracefully.
208 */
209void
210solaris_set_default_project(struct passwd *pw)
211{
212 struct project *defaultproject;
213 struct project tempproject;
214 char buf[1024];
215
216 /* get default project, if we fail just return gracefully */
217 if ((defaultproject = getdefaultproj(pw->pw_name, &tempproject, &buf,
218 sizeof(buf))) > 0) {
219 /* set default project */
220 if (setproject(defaultproject->pj_name, pw->pw_name,
221 TASK_NORMAL) != 0)
222 debug("setproject(%s): %s", defaultproject->pj_name,
223 strerror(errno));
224 } else {
225 /* debug on getdefaultproj() error */
226 debug("getdefaultproj(%s): %s", pw->pw_name, strerror(errno));
227 }
228}
229#endif /* USE_SOLARIS_PROJECTS */
| 1/* $Id: port-solaris.c,v 1.4 2010/11/05 01:03:05 dtucker Exp $ */
2
3/*
4 * Copyright (c) 2006 Chad Mynhier.
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include "config.h"
20#include "includes.h"
21
22#ifdef USE_SOLARIS_PROCESS_CONTRACTS
23
24#include <sys/types.h>
25#include <sys/stat.h>
26#include <sys/param.h>
27
28#include <errno.h>
29#ifdef HAVE_FCNTL_H
30# include <fcntl.h>
31#endif
32#include <stdarg.h>
33#include <string.h>
34#include <unistd.h>
35
36#include <libcontract.h>
37#include <sys/contract/process.h>
38#include <sys/ctfs.h>
39
40#include "log.h"
41
42#define CT_TEMPLATE CTFS_ROOT "/process/template"
43#define CT_LATEST CTFS_ROOT "/process/latest"
44
45static int tmpl_fd = -1;
46
47/* Lookup the latest process contract */
48static ctid_t
49get_active_process_contract_id(void)
50{
51 int stat_fd;
52 ctid_t ctid = -1;
53 ct_stathdl_t stathdl;
54
55 if ((stat_fd = open64(CT_LATEST, O_RDONLY)) == -1) {
56 error("%s: Error opening 'latest' process "
57 "contract: %s", __func__, strerror(errno));
58 return -1;
59 }
60 if (ct_status_read(stat_fd, CTD_COMMON, &stathdl) != 0) {
61 error("%s: Error reading process contract "
62 "status: %s", __func__, strerror(errno));
63 goto out;
64 }
65 if ((ctid = ct_status_get_id(stathdl)) < 0) {
66 error("%s: Error getting process contract id: %s",
67 __func__, strerror(errno));
68 goto out;
69 }
70
71 ct_status_free(stathdl);
72 out:
73 close(stat_fd);
74 return ctid;
75}
76
77void
78solaris_contract_pre_fork(void)
79{
80 if ((tmpl_fd = open64(CT_TEMPLATE, O_RDWR)) == -1) {
81 error("%s: open %s: %s", __func__,
82 CT_TEMPLATE, strerror(errno));
83 return;
84 }
85
86 debug2("%s: setting up process contract template on fd %d",
87 __func__, tmpl_fd);
88
89 /* First we set the template parameters and event sets. */
90 if (ct_pr_tmpl_set_param(tmpl_fd, CT_PR_PGRPONLY) != 0) {
91 error("%s: Error setting process contract parameter set "
92 "(pgrponly): %s", __func__, strerror(errno));
93 goto fail;
94 }
95 if (ct_pr_tmpl_set_fatal(tmpl_fd, CT_PR_EV_HWERR) != 0) {
96 error("%s: Error setting process contract template "
97 "fatal events: %s", __func__, strerror(errno));
98 goto fail;
99 }
100 if (ct_tmpl_set_critical(tmpl_fd, 0) != 0) {
101 error("%s: Error setting process contract template "
102 "critical events: %s", __func__, strerror(errno));
103 goto fail;
104 }
105 if (ct_tmpl_set_informative(tmpl_fd, CT_PR_EV_HWERR) != 0) {
106 error("%s: Error setting process contract template "
107 "informative events: %s", __func__, strerror(errno));
108 goto fail;
109 }
110
111 /* Now make this the active template for this process. */
112 if (ct_tmpl_activate(tmpl_fd) != 0) {
113 error("%s: Error activating process contract "
114 "template: %s", __func__, strerror(errno));
115 goto fail;
116 }
117 return;
118
119 fail:
120 if (tmpl_fd != -1) {
121 close(tmpl_fd);
122 tmpl_fd = -1;
123 }
124}
125
126void
127solaris_contract_post_fork_child()
128{
129 debug2("%s: clearing process contract template on fd %d",
130 __func__, tmpl_fd);
131
132 /* Clear the active template. */
133 if (ct_tmpl_clear(tmpl_fd) != 0)
134 error("%s: Error clearing active process contract "
135 "template: %s", __func__, strerror(errno));
136
137 close(tmpl_fd);
138 tmpl_fd = -1;
139}
140
141void
142solaris_contract_post_fork_parent(pid_t pid)
143{
144 ctid_t ctid;
145 char ctl_path[256];
146 int r, ctl_fd = -1, stat_fd = -1;
147
148 debug2("%s: clearing template (fd %d)", __func__, tmpl_fd);
149
150 if (tmpl_fd == -1)
151 return;
152
153 /* First clear the active template. */
154 if ((r = ct_tmpl_clear(tmpl_fd)) != 0)
155 error("%s: Error clearing active process contract "
156 "template: %s", __func__, strerror(errno));
157
158 close(tmpl_fd);
159 tmpl_fd = -1;
160
161 /*
162 * If either the fork didn't succeed (pid < 0), or clearing
163 * th active contract failed (r != 0), then we have nothing
164 * more do.
165 */
166 if (r != 0 || pid <= 0)
167 return;
168
169 /* Now lookup and abandon the contract we've created. */
170 ctid = get_active_process_contract_id();
171
172 debug2("%s: abandoning contract id %ld", __func__, ctid);
173
174 snprintf(ctl_path, sizeof(ctl_path),
175 CTFS_ROOT "/process/%ld/ctl", ctid);
176 if ((ctl_fd = open64(ctl_path, O_WRONLY)) < 0) {
177 error("%s: Error opening process contract "
178 "ctl file: %s", __func__, strerror(errno));
179 goto fail;
180 }
181 if (ct_ctl_abandon(ctl_fd) < 0) {
182 error("%s: Error abandoning process contract: %s",
183 __func__, strerror(errno));
184 goto fail;
185 }
186 close(ctl_fd);
187 return;
188
189 fail:
190 if (tmpl_fd != -1) {
191 close(tmpl_fd);
192 tmpl_fd = -1;
193 }
194 if (stat_fd != -1)
195 close(stat_fd);
196 if (ctl_fd != -1)
197 close(ctl_fd);
198}
199#endif
200
201#ifdef USE_SOLARIS_PROJECTS
202#include <sys/task.h>
203#include <project.h>
204
205/*
206 * Get/set solaris default project.
207 * If we fail, just run along gracefully.
208 */
209void
210solaris_set_default_project(struct passwd *pw)
211{
212 struct project *defaultproject;
213 struct project tempproject;
214 char buf[1024];
215
216 /* get default project, if we fail just return gracefully */
217 if ((defaultproject = getdefaultproj(pw->pw_name, &tempproject, &buf,
218 sizeof(buf))) > 0) {
219 /* set default project */
220 if (setproject(defaultproject->pj_name, pw->pw_name,
221 TASK_NORMAL) != 0)
222 debug("setproject(%s): %s", defaultproject->pj_name,
223 strerror(errno));
224 } else {
225 /* debug on getdefaultproj() error */
226 debug("getdefaultproj(%s): %s", pw->pw_name, strerror(errno));
227 }
228}
229#endif /* USE_SOLARIS_PROJECTS */
|
| 230
231#ifdef USE_SOLARIS_PRIVS
232# ifdef HAVE_PRIV_H
233# include <priv.h>
234# endif
235
236priv_set_t *
237solaris_basic_privset(void)
238{
239 priv_set_t *pset;
240
241#ifdef HAVE_PRIV_BASICSET
242 if ((pset = priv_allocset()) == NULL) {
243 error("priv_allocset: %s", strerror(errno));
244 return NULL;
245 }
246 priv_basicset(pset);
247#else
248 if ((pset = priv_str_to_set("basic", ",", NULL)) == NULL) {
249 error("priv_str_to_set: %s", strerror(errno));
250 return NULL;
251 }
252#endif
253 return pset;
254}
255
256void
257solaris_drop_privs_pinfo_net_fork_exec(void)
258{
259 priv_set_t *pset = NULL, *npset = NULL;
260
261 /*
262 * Note: this variant avoids dropping DAC filesystem rights, in case
263 * the process calling it is running as root and should have the
264 * ability to read/write/chown any file on the system.
265 *
266 * We start with the basic set, then *add* the DAC rights to it while
267 * taking away other parts of BASIC we don't need. Then we intersect
268 * this with our existing PERMITTED set. In this way we keep any
269 * DAC rights we had before, while otherwise reducing ourselves to
270 * the minimum set of privileges we need to proceed.
271 *
272 * This also means we drop any other parts of "root" that we don't
273 * need (e.g. the ability to kill any process, create new device nodes
274 * etc etc).
275 */
276
277 if ((pset = priv_allocset()) == NULL)
278 fatal("priv_allocset: %s", strerror(errno));
279 if ((npset = solaris_basic_privset()) == NULL)
280 fatal("solaris_basic_privset: %s", strerror(errno));
281
282 if (priv_addset(npset, PRIV_FILE_CHOWN) != 0 ||
283 priv_addset(npset, PRIV_FILE_DAC_READ) != 0 ||
284 priv_addset(npset, PRIV_FILE_DAC_SEARCH) != 0 ||
285 priv_addset(npset, PRIV_FILE_DAC_WRITE) != 0 ||
286 priv_addset(npset, PRIV_FILE_OWNER) != 0)
287 fatal("priv_addset: %s", strerror(errno));
288
289 if (priv_delset(npset, PRIV_FILE_LINK_ANY) != 0 ||
290#ifdef PRIV_NET_ACCESS
291 priv_delset(npset, PRIV_NET_ACCESS) != 0 ||
292#endif
293 priv_delset(npset, PRIV_PROC_EXEC) != 0 ||
294 priv_delset(npset, PRIV_PROC_FORK) != 0 ||
295 priv_delset(npset, PRIV_PROC_INFO) != 0 ||
296 priv_delset(npset, PRIV_PROC_SESSION) != 0)
297 fatal("priv_delset: %s", strerror(errno));
298
299 if (getppriv(PRIV_PERMITTED, pset) != 0)
300 fatal("getppriv: %s", strerror(errno));
301
302 priv_intersect(pset, npset);
303
304 if (setppriv(PRIV_SET, PRIV_PERMITTED, npset) != 0 ||
305 setppriv(PRIV_SET, PRIV_LIMIT, npset) != 0 ||
306 setppriv(PRIV_SET, PRIV_INHERITABLE, npset) != 0)
307 fatal("setppriv: %s", strerror(errno));
308
309 priv_freeset(pset);
310 priv_freeset(npset);
311}
312
313void
314solaris_drop_privs_root_pinfo_net(void)
315{
316 priv_set_t *pset = NULL;
317
318 /* Start with "basic" and drop everything we don't need. */
319 if ((pset = solaris_basic_privset()) == NULL)
320 fatal("solaris_basic_privset: %s", strerror(errno));
321
322 if (priv_delset(pset, PRIV_FILE_LINK_ANY) != 0 ||
323#ifdef PRIV_NET_ACCESS
324 priv_delset(pset, PRIV_NET_ACCESS) != 0 ||
325#endif
326 priv_delset(pset, PRIV_PROC_INFO) != 0 ||
327 priv_delset(pset, PRIV_PROC_SESSION) != 0)
328 fatal("priv_delset: %s", strerror(errno));
329
330 if (setppriv(PRIV_SET, PRIV_PERMITTED, pset) != 0 ||
331 setppriv(PRIV_SET, PRIV_LIMIT, pset) != 0 ||
332 setppriv(PRIV_SET, PRIV_INHERITABLE, pset) != 0)
333 fatal("setppriv: %s", strerror(errno));
334
335 priv_freeset(pset);
336}
337
338void
339solaris_drop_privs_root_pinfo_net_exec(void)
340{
341 priv_set_t *pset = NULL;
342
343
344 /* Start with "basic" and drop everything we don't need. */
345 if ((pset = solaris_basic_privset()) == NULL)
346 fatal("solaris_basic_privset: %s", strerror(errno));
347
348 if (priv_delset(pset, PRIV_FILE_LINK_ANY) != 0 ||
349#ifdef PRIV_NET_ACCESS
350 priv_delset(pset, PRIV_NET_ACCESS) != 0 ||
351#endif
352 priv_delset(pset, PRIV_PROC_EXEC) != 0 ||
353 priv_delset(pset, PRIV_PROC_INFO) != 0 ||
354 priv_delset(pset, PRIV_PROC_SESSION) != 0)
355 fatal("priv_delset: %s", strerror(errno));
356
357 if (setppriv(PRIV_SET, PRIV_PERMITTED, pset) != 0 ||
358 setppriv(PRIV_SET, PRIV_LIMIT, pset) != 0 ||
359 setppriv(PRIV_SET, PRIV_INHERITABLE, pset) != 0)
360 fatal("setppriv: %s", strerror(errno));
361
362 priv_freeset(pset);
363}
364
365#endif
|