1279368Sjchandra/*
2279368Sjchandra * Copyright (c) 2005, PADL Software Pty Ltd.
3279368Sjchandra * All rights reserved.
4279368Sjchandra *
5279368Sjchandra * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
6279368Sjchandra *
7279368Sjchandra * Redistribution and use in source and binary forms, with or without
8279368Sjchandra * modification, are permitted provided that the following conditions
9279368Sjchandra * are met:
10279368Sjchandra *
11279368Sjchandra * 1. Redistributions of source code must retain the above copyright
12279368Sjchandra *    notice, this list of conditions and the following disclaimer.
13279368Sjchandra *
14279368Sjchandra * 2. Redistributions in binary form must reproduce the above copyright
15279368Sjchandra *    notice, this list of conditions and the following disclaimer in the
16279368Sjchandra *    documentation and/or other materials provided with the distribution.
17279368Sjchandra *
18279368Sjchandra * 3. Neither the name of PADL Software nor the names of its contributors
19279368Sjchandra *    may be used to endorse or promote products derived from this software
20279368Sjchandra *    without specific prior written permission.
21279368Sjchandra *
22279368Sjchandra * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
23279368Sjchandra * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24279368Sjchandra * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25279368Sjchandra * ARE DISCLAIMED.  IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
26279368Sjchandra * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27279368Sjchandra * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28279368Sjchandra * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29280772Sian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30280772Sian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31279368Sjchandra * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32280772Sian * SUCH DAMAGE.
33280772Sian */
34279368Sjchandra
35279368Sjchandra#include "kcm_locl.h"
36279368Sjchandra#include <getarg.h>
37279368Sjchandra#include <parse_bytes.h>
38279368Sjchandra
39279368Sjchandrastatic const char *config_file;	/* location of kcm config file */
40279368Sjchandra
41279368Sjchandrasize_t max_request = 0;		/* maximal size of a request */
42279368Sjchandrachar *socket_path = NULL;
43279368Sjchandrachar *door_path = NULL;
44279368Sjchandra
45279368Sjchandrastatic char *max_request_str;	/* `max_request' as a string */
46279368Sjchandra
47279368Sjchandra#ifdef SUPPORT_DETACH
48279368Sjchandraint detach_from_console = -1;
49279368Sjchandra#define DETACH_IS_DEFAULT FALSE
50279368Sjchandra#endif
51279368Sjchandra
52279368Sjchandrastatic const char *system_cache_name = NULL;
53279368Sjchandrastatic const char *system_keytab = NULL;
54279368Sjchandrastatic const char *system_principal = NULL;
55279368Sjchandrastatic const char *system_server = NULL;
56279368Sjchandrastatic const char *system_perms = NULL;
57279368Sjchandrastatic const char *system_user = NULL;
58280772Sianstatic const char *system_group = NULL;
59280772Sian
60280772Sianstatic const char *renew_life = NULL;
61280772Sianstatic const char *ticket_life = NULL;
62280772Sian
63280772Sianint launchd_flag = 0;
64280772Sianint 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
402