source: heimdal/trunk/kcm/config.c@ 5

Last change on this file since 5 was 1, checked in by Paul Smedley, 10 years ago

Initial commit of Heimdal 1.5.3
File size: 9.7 KB
Line 
1/*
2 * Copyright (c) 2005, PADL Software Pty Ltd.
3 * All rights reserved.
4 *
5 * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * 3. Neither the name of PADL Software nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include "kcm_locl.h"
36#include <getarg.h>
37#include <parse_bytes.h>
38
39static const char *config_file; /* location of kcm config file */
40
41size_t max_request = 0; /* maximal size of a request */
42char *socket_path = NULL;
43char *door_path = NULL;
44
45static char *max_request_str; /* `max_request' as a string */
46
47#ifdef SUPPORT_DETACH
48int detach_from_console = -1;
49#define DETACH_IS_DEFAULT FALSE
50#endif
51
52static const char *system_cache_name = NULL;
53static const char *system_keytab = NULL;
54static const char *system_principal = NULL;
55static const char *system_server = NULL;
56static const char *system_perms = NULL;
57static const char *system_user = NULL;
58static const char *system_group = NULL;
59
60static const char *renew_life = NULL;
61static const char *ticket_life = NULL;
62
63int launchd_flag = 0;
64int disallow_getting_krbtgt = 0;
65int name_constraints = -1;
66
67static int help_flag;
68static int version_flag;
69
70static struct getargs args[] = {
71 {
72 "cache-name", 0, arg_string, &system_cache_name,
73 "system cache name", "cachename"
74 },
75 {
76 "config-file", 'c', arg_string, &config_file,
77 "location of config file", "file"
78 },
79 {
80 "group", 'g', arg_string, &system_group,
81 "system cache group", "group"
82 },
83 {
84 "max-request", 0, arg_string, &max_request,
85 "max size for a kcm-request", "size"
86 },
87 {
88 "launchd", 0, arg_flag, &launchd_flag,
89 "when in use by launchd"
90 },
91#ifdef SUPPORT_DETACH
92#if DETACH_IS_DEFAULT
93 {
94 "detach", 'D', arg_negative_flag, &detach_from_console,
95 "don't detach from console"
96 },
97#else
98 {
99 "detach", 0 , arg_flag, &detach_from_console,
100 "detach from console"
101 },
102#endif
103#endif
104 { "help", 'h', arg_flag, &help_flag },
105 {
106 "system-principal", 'k', arg_string, &system_principal,
107 "system principal name", "principal"
108 },
109 {
110 "lifetime", 'l', arg_string, &ticket_life,
111 "lifetime of system tickets", "time"
112 },
113 {
114 "mode", 'm', arg_string, &system_perms,
115 "octal mode of system cache", "mode"
116 },
117 {
118 "name-constraints", 'n', arg_negative_flag, &name_constraints,
119 "disable credentials cache name constraints"
120 },
121 {
122 "disallow-getting-krbtgt", 0, arg_flag, &disallow_getting_krbtgt,
123 "disable fetching krbtgt from the cache"
124 },
125 {
126 "renewable-life", 'r', arg_string, &renew_life,
127 "renewable lifetime of system tickets", "time"
128 },
129 {
130 "socket-path", 's', arg_string, &socket_path,
131 "path to kcm domain socket", "path"
132 },
133#ifdef HAVE_DOOR_CREATE
134 {
135 "door-path", 's', arg_string, &door_path,
136 "path to kcm door", "path"
137 },
138#endif
139 {
140 "server", 'S', arg_string, &system_server,
141 "server to get system ticket for", "principal"
142 },
143 {
144 "keytab", 't', arg_string, &system_keytab,
145 "system keytab name", "keytab"
146 },
147 {
148 "user", 'u', arg_string, &system_user,
149 "system cache owner", "user"
150 },
151 { "version", 'v', arg_flag, &version_flag }
152};
153
154static int num_args = sizeof(args) / sizeof(args[0]);
155
156static void
157usage(int ret)
158{
159 arg_printusage (args, num_args, NULL, "");
160 exit (ret);
161}
162
163static int parse_owners(kcm_ccache ccache)
164{
165 uid_t uid = 0;
166 gid_t gid = 0;
167 struct passwd *pw;
168 struct group *gr;
169 int uid_p = 0;
170 int gid_p = 0;
171
172 if (system_user != NULL) {
173 if (isdigit((unsigned char)system_user[0])) {
174 pw = getpwuid(atoi(system_user));
175 } else {
176 pw = getpwnam(system_user);
177 }
178 if (pw == NULL) {
179 return errno;
180 }
181
182 system_user = strdup(pw->pw_name);
183 if (system_user == NULL) {
184 return ENOMEM;
185 }
186
187 uid = pw->pw_uid; uid_p = 1;
188 gid = pw->pw_gid; gid_p = 1;
189 }
190
191 if (system_group != NULL) {
192 if (isdigit((unsigned char)system_group[0])) {
193 gr = getgrgid(atoi(system_group));
194 } else {
195 gr = getgrnam(system_group);
196 }
197 if (gr == NULL) {
198 return errno;
199 }
200
201 gid = gr->gr_gid; gid_p = 1;
202 }
203
204 if (uid_p)
205 ccache->uid = uid;
206 else
207 ccache->uid = 0; /* geteuid() XXX */
208
209 if (gid_p)
210 ccache->gid = gid;
211 else
212 ccache->gid = 0; /* getegid() XXX */
213
214 return 0;
215}
216
217static const char *
218kcm_system_config_get_string(const char *string)
219{
220 return krb5_config_get_string(kcm_context, NULL, "kcm",
221 "system_ccache", string, NULL);
222}
223
224static krb5_error_code
225ccache_init_system(void)
226{
227 kcm_ccache ccache;
228 krb5_error_code ret;
229
230 if (system_cache_name == NULL)
231 system_cache_name = kcm_system_config_get_string("cc_name");
232
233 ret = kcm_ccache_new(kcm_context,
234 system_cache_name ? system_cache_name : "SYSTEM",
235 &ccache);
236 if (ret)
237 return ret;
238
239 ccache->flags |= KCM_FLAGS_OWNER_IS_SYSTEM;
240 ccache->flags |= KCM_FLAGS_USE_KEYTAB;
241
242 ret = parse_owners(ccache);
243 if (ret)
244 return ret;
245
246 ret = krb5_parse_name(kcm_context, system_principal, &ccache->client);
247 if (ret) {
248 kcm_release_ccache(kcm_context, ccache);
249 return ret;
250 }
251
252 if (system_server == NULL)
253 system_server = kcm_system_config_get_string("server");
254
255 if (system_server != NULL) {
256 ret = krb5_parse_name(kcm_context, system_server, &ccache->server);
257 if (ret) {
258 kcm_release_ccache(kcm_context, ccache);
259 return ret;
260 }
261 }
262
263 if (system_keytab == NULL)
264 system_keytab = kcm_system_config_get_string("keytab_name");
265
266 if (system_keytab != NULL) {
267 ret = krb5_kt_resolve(kcm_context, system_keytab, &ccache->key.keytab);
268 } else {
269 ret = krb5_kt_default(kcm_context, &ccache->key.keytab);
270 }
271 if (ret) {
272 kcm_release_ccache(kcm_context, ccache);
273 return ret;
274 }
275
276 if (renew_life == NULL)
277 renew_life = kcm_system_config_get_string("renew_life");
278
279 if (renew_life == NULL)
280 renew_life = "1 month";
281
282 if (renew_life != NULL) {
283 ccache->renew_life = parse_time(renew_life, "s");
284 if (ccache->renew_life < 0) {
285 kcm_release_ccache(kcm_context, ccache);
286 return EINVAL;
287 }
288 }
289
290 if (ticket_life == NULL)
291 ticket_life = kcm_system_config_get_string("ticket_life");
292
293 if (ticket_life != NULL) {
294 ccache->tkt_life = parse_time(ticket_life, "s");
295 if (ccache->tkt_life < 0) {
296 kcm_release_ccache(kcm_context, ccache);
297 return EINVAL;
298 }
299 }
300
301 if (system_perms == NULL)
302 system_perms = kcm_system_config_get_string("mode");
303
304 if (system_perms != NULL) {
305 int mode;
306
307 if (sscanf(system_perms, "%o", &mode) != 1)
308 return EINVAL;
309
310 ccache->mode = mode;
311 }
312
313 if (disallow_getting_krbtgt == -1) {
314 disallow_getting_krbtgt =
315 krb5_config_get_bool_default(kcm_context, NULL, FALSE, "kcm",
316 "disallow-getting-krbtgt", NULL);
317 }
318
319 /* enqueue default actions for credentials cache */
320 ret = kcm_ccache_enqueue_default(kcm_context, ccache, NULL);
321
322 kcm_release_ccache(kcm_context, ccache); /* retained by event queue */
323
324 return ret;
325}
326
327void
328kcm_configure(int argc, char **argv)
329{
330 krb5_error_code ret;
331 int optind = 0;
332 const char *p;
333
334 while(getarg(args, num_args, argc, argv, &optind))
335 warnx("error at argument `%s'", argv[optind]);
336
337 if(help_flag)
338 usage (0);
339
340 if (version_flag) {
341 print_version(NULL);
342 exit(0);
343 }
344
345 argc -= optind;
346 argv += optind;
347
348 if (argc != 0)
349 usage(1);
350
351 {
352 char **files;
353
354 if(config_file == NULL)
355 config_file = _PATH_KCM_CONF;
356
357 ret = krb5_prepend_config_files_default(config_file, &files);
358 if (ret)
359 krb5_err(kcm_context, 1, ret, "getting configuration files");
360
361 ret = krb5_set_config_files(kcm_context, files);
362 krb5_free_config_files(files);
363 if(ret)
364 krb5_err(kcm_context, 1, ret, "reading configuration files");
365 }
366
367 if(max_request_str)
368 max_request = parse_bytes(max_request_str, NULL);
369
370 if(max_request == 0){
371 p = krb5_config_get_string (kcm_context,
372 NULL,
373 "kcm",
374 "max-request",
375 NULL);
376 if(p)
377 max_request = parse_bytes(p, NULL);
378 }
379
380 if (system_principal == NULL) {
381 system_principal = kcm_system_config_get_string("principal");
382 }
383
384 if (system_principal != NULL) {
385 ret = ccache_init_system();
386 if (ret)
387 krb5_err(kcm_context, 1, ret, "initializing system ccache");
388 }
389
390#ifdef SUPPORT_DETACH
391 if(detach_from_console == -1)
392 detach_from_console = krb5_config_get_bool_default(kcm_context, NULL,
393 DETACH_IS_DEFAULT,
394 "kcm",
395 "detach", NULL);
396#endif
397 kcm_openlog();
398 if(max_request == 0)
399 max_request = 64 * 1024;
400}
401
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