xref: /freebsd/crypto/heimdal/kdc/config.c (revision d6b92ffa)
1 /*
2  * Copyright (c) 1997-2007 Kungliga Tekniska Högskolan
3  * (Royal Institute of Technology, Stockholm, Sweden).
4  * All rights reserved.
5  *
6  * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  *
19  * 3. Neither the name of the Institute nor the names of its contributors
20  *    may be used to endorse or promote products derived from this software
21  *    without specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33  * SUCH DAMAGE.
34  */
35 
36 #include "kdc_locl.h"
37 #include <getarg.h>
38 #include <parse_bytes.h>
39 
40 struct dbinfo {
41     char *realm;
42     char *dbname;
43     char *mkey_file;
44     struct dbinfo *next;
45 };
46 
47 static char *config_file;	/* location of kdc config file */
48 
49 static int require_preauth = -1; /* 1 == require preauth for all principals */
50 static char *max_request_str;	/* `max_request' as a string */
51 
52 static int disable_des = -1;
53 
54 static int builtin_hdb_flag;
55 static int help_flag;
56 static int version_flag;
57 
58 static struct getarg_strings addresses_str;	/* addresses to listen on */
59 
60 char *runas_string;
61 char *chroot_string;
62 
63 
64 static struct getargs args[] = {
65     {
66 	"config-file",	'c',	arg_string,	&config_file,
67 	"location of config file",	"file"
68     },
69     {
70 	"require-preauth",	'p',	arg_negative_flag, &require_preauth,
71 	"don't require pa-data in as-reqs", NULL
72     },
73     {
74 	"max-request",	0,	arg_string, &max_request_str,
75 	"max size for a kdc-request", "size"
76     },
77     { "enable-http", 'H', arg_flag, &enable_http, "turn on HTTP support",
78    	 NULL },
79     {	"ports",	'P', 	arg_string, rk_UNCONST(&port_str),
80 	"ports to listen to", "portspec"
81     },
82 #ifdef SUPPORT_DETACH
83 #if DETACH_IS_DEFAULT
84     {
85 	"detach",       'D',      arg_negative_flag, &detach_from_console,
86 	"don't detach from console", NULL
87     },
88 #else
89     {
90 	"detach",       0 ,      arg_flag, &detach_from_console,
91 	"detach from console", NULL
92     },
93 #endif
94 #endif
95     {	"addresses",	0,	arg_strings, &addresses_str,
96 	"addresses to listen on", "list of addresses" },
97     {	"disable-des",	0,	arg_flag, &disable_des,
98 	"disable DES", NULL },
99     {	"builtin-hdb",	0,	arg_flag,   &builtin_hdb_flag,
100 	"list builtin hdb backends", NULL},
101     {   "runas-user",	0,	arg_string, &runas_string,
102 	"run as this user when connected to network", NULL
103     },
104     {   "chroot",	0,	arg_string, &chroot_string,
105 	"chroot directory to run in", NULL
106     },
107     {	"help",		'h',	arg_flag,   &help_flag, NULL, NULL },
108     {	"version",	'v',	arg_flag,   &version_flag, NULL, NULL }
109 };
110 
111 static int num_args = sizeof(args) / sizeof(args[0]);
112 
113 static void
114 usage(int ret)
115 {
116     arg_printusage (args, num_args, NULL, "");
117     exit (ret);
118 }
119 
120 static void
121 add_one_address (krb5_context context, const char *str, int first)
122 {
123     krb5_error_code ret;
124     krb5_addresses tmp;
125 
126     ret = krb5_parse_address (context, str, &tmp);
127     if (ret)
128 	krb5_err (context, 1, ret, "parse_address `%s'", str);
129     if (first)
130 	krb5_copy_addresses(context, &tmp, &explicit_addresses);
131     else
132 	krb5_append_addresses(context, &explicit_addresses, &tmp);
133     krb5_free_addresses (context, &tmp);
134 }
135 
136 krb5_kdc_configuration *
137 configure(krb5_context context, int argc, char **argv)
138 {
139     krb5_kdc_configuration *config;
140     krb5_error_code ret;
141     int optidx = 0;
142     const char *p;
143 
144     while(getarg(args, num_args, argc, argv, &optidx))
145 	warnx("error at argument `%s'", argv[optidx]);
146 
147     if(help_flag)
148 	usage (0);
149 
150     if (version_flag) {
151 	print_version(NULL);
152 	exit(0);
153     }
154 
155     if (builtin_hdb_flag) {
156 	char *list;
157 	ret = hdb_list_builtin(context, &list);
158 	if (ret)
159 	    krb5_err(context, 1, ret, "listing builtin hdb backends");
160 	printf("builtin hdb backends: %s\n", list);
161 	free(list);
162 	exit(0);
163     }
164 
165     argc -= optidx;
166     argv += optidx;
167 
168     if (argc != 0)
169 	usage(1);
170 
171     {
172 	char **files;
173 
174 	if (config_file == NULL) {
175 	    asprintf(&config_file, "%s/kdc.conf", hdb_db_dir(context));
176 	    if (config_file == NULL)
177 		errx(1, "out of memory");
178 	}
179 
180 	ret = krb5_prepend_config_files_default(config_file, &files);
181 	if (ret)
182 	    krb5_err(context, 1, ret, "getting configuration files");
183 
184 	ret = krb5_set_config_files(context, files);
185 	krb5_free_config_files(files);
186 	if(ret)
187 	    krb5_err(context, 1, ret, "reading configuration files");
188     }
189 
190     ret = krb5_kdc_get_config(context, &config);
191     if (ret)
192 	krb5_err(context, 1, ret, "krb5_kdc_default_config");
193 
194     kdc_openlog(context, "kdc", config);
195 
196     ret = krb5_kdc_set_dbinfo(context, config);
197     if (ret)
198 	krb5_err(context, 1, ret, "krb5_kdc_set_dbinfo");
199 
200     if(max_request_str)
201 	max_request_tcp = max_request_udp = parse_bytes(max_request_str, NULL);
202 
203     if(max_request_tcp == 0){
204 	p = krb5_config_get_string (context,
205 				    NULL,
206 				    "kdc",
207 				    "max-request",
208 				    NULL);
209 	if(p)
210 	    max_request_tcp = max_request_udp = parse_bytes(p, NULL);
211     }
212 
213     if(require_preauth != -1)
214 	config->require_preauth = require_preauth;
215 
216     if(port_str == NULL){
217 	p = krb5_config_get_string(context, NULL, "kdc", "ports", NULL);
218 	if (p != NULL)
219 	    port_str = strdup(p);
220     }
221 
222     explicit_addresses.len = 0;
223 
224     if (addresses_str.num_strings) {
225 	int i;
226 
227 	for (i = 0; i < addresses_str.num_strings; ++i)
228 	    add_one_address (context, addresses_str.strings[i], i == 0);
229 	free_getarg_strings (&addresses_str);
230     } else {
231 	char **foo = krb5_config_get_strings (context, NULL,
232 					      "kdc", "addresses", NULL);
233 
234 	if (foo != NULL) {
235 	    add_one_address (context, *foo++, TRUE);
236 	    while (*foo)
237 		add_one_address (context, *foo++, FALSE);
238 	}
239     }
240 
241     if(enable_http == -1)
242 	enable_http = krb5_config_get_bool(context, NULL, "kdc",
243 					   "enable-http", NULL);
244 
245     if(request_log == NULL)
246 	request_log = krb5_config_get_string(context, NULL,
247 					     "kdc",
248 					     "kdc-request-log",
249 					     NULL);
250 
251     if (krb5_config_get_string(context, NULL, "kdc",
252 			       "enforce-transited-policy", NULL))
253 	krb5_errx(context, 1, "enforce-transited-policy deprecated, "
254 		  "use [kdc]transited-policy instead");
255 
256 #ifdef SUPPORT_DETACH
257     if(detach_from_console == -1)
258 	detach_from_console = krb5_config_get_bool_default(context, NULL,
259 							   DETACH_IS_DEFAULT,
260 							   "kdc",
261 							   "detach", NULL);
262 #endif /* SUPPORT_DETACH */
263 
264     if(max_request_tcp == 0)
265 	max_request_tcp = 64 * 1024;
266     if(max_request_udp == 0)
267 	max_request_udp = 64 * 1024;
268 
269     if (port_str == NULL)
270 	port_str = "+";
271 
272     if(disable_des == -1)
273 	disable_des = krb5_config_get_bool_default(context, NULL,
274 						   FALSE,
275 						   "kdc",
276 						   "disable-des", NULL);
277     if(disable_des) {
278 	krb5_enctype_disable(context, ETYPE_DES_CBC_CRC);
279 	krb5_enctype_disable(context, ETYPE_DES_CBC_MD4);
280 	krb5_enctype_disable(context, ETYPE_DES_CBC_MD5);
281 	krb5_enctype_disable(context, ETYPE_DES_CBC_NONE);
282 	krb5_enctype_disable(context, ETYPE_DES_CFB64_NONE);
283 	krb5_enctype_disable(context, ETYPE_DES_PCBC_NONE);
284     }
285 
286     krb5_kdc_windc_init(context);
287 
288     krb5_kdc_pkinit_config(context, config);
289 
290     return config;
291 }
292