1 /* $NetBSD: config.c,v 1.2 2017/01/28 21:31:44 christos Exp $ */
2
3 /*
4 * Copyright (c) 1997-2007 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 *
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * 3. Neither the name of the Institute nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38 #include "kdc_locl.h"
39 #include <krb5/getarg.h>
40 #include <krb5/parse_bytes.h>
41
42 struct dbinfo {
43 char *realm;
44 char *dbname;
45 char *mkey_file;
46 struct dbinfo *next;
47 };
48
49 static char *config_file; /* location of kdc config file */
50
51 static int require_preauth = -1; /* 1 == require preauth for all principals */
52 static char *max_request_str; /* `max_request' as a string */
53
54 static int disable_des = -1;
55
56 static int builtin_hdb_flag;
57 int testing_flag;
58 static int help_flag;
59 static int version_flag;
60
61 /* Should we enable the HTTP hack? */
62 int enable_http = -1;
63
64 /* Log over requests to the KDC */
65 const char *request_log;
66
67 /* A string describing on what ports to listen */
68 const char *port_str;
69
70 krb5_addresses explicit_addresses;
71
72 size_t max_request_udp;
73 size_t max_request_tcp;
74
75
76 static struct getarg_strings addresses_str; /* addresses to listen on */
77
78 char *runas_string;
79 char *chroot_string;
80
81
82 static struct getargs args[] = {
83 {
84 "config-file", 'c', arg_string, &config_file,
85 "location of config file", "file"
86 },
87 {
88 "require-preauth", 'p', arg_negative_flag, &require_preauth,
89 "don't require pa-data in as-reqs", NULL
90 },
91 {
92 "max-request", 0, arg_string, &max_request_str,
93 "max size for a kdc-request", "size"
94 },
95 { "enable-http", 'H', arg_flag, &enable_http, "turn on HTTP support",
96 NULL },
97 { "ports", 'P', arg_string, rk_UNCONST(&port_str),
98 "ports to listen to", "portspec"
99 },
100 {
101 "detach", 0 , arg_flag, &detach_from_console,
102 "detach from console", NULL
103 },
104 {
105 "daemon-child", 0 , arg_flag, &daemon_child,
106 "private argument, do not use", NULL
107 },
108 #ifdef __APPLE__
109 {
110 "bonjour", 0 , arg_flag, &do_bonjour,
111 "private argument, do not use", NULL
112 },
113 #endif
114 { "addresses", 0, arg_strings, &addresses_str,
115 "addresses to listen on", "list of addresses" },
116 { "disable-des", 0, arg_flag, &disable_des,
117 "disable DES", NULL },
118 { "builtin-hdb", 0, arg_flag, &builtin_hdb_flag,
119 "list builtin hdb backends", NULL},
120 { "runas-user", 0, arg_string, &runas_string,
121 "run as this user when connected to network", NULL
122 },
123 { "chroot", 0, arg_string, &chroot_string,
124 "chroot directory to run in", NULL
125 },
126 { "testing", 0, arg_flag, &testing_flag, NULL, NULL },
127 { "help", 'h', arg_flag, &help_flag, NULL, NULL },
128 { "version", 'v', arg_flag, &version_flag, NULL, NULL }
129 };
130
131 static int num_args = sizeof(args) / sizeof(args[0]);
132
133 static void
usage(int ret)134 usage(int ret)
135 {
136 arg_printusage (args, num_args, NULL, "");
137 exit (ret);
138 }
139
140 static void
add_one_address(krb5_context context,const char * str,int first)141 add_one_address (krb5_context context, const char *str, int first)
142 {
143 krb5_error_code ret;
144 krb5_addresses tmp;
145
146 ret = krb5_parse_address (context, str, &tmp);
147 if (ret)
148 krb5_err (context, 1, ret, "parse_address `%s'", str);
149 if (first)
150 krb5_copy_addresses(context, &tmp, &explicit_addresses);
151 else
152 krb5_append_addresses(context, &explicit_addresses, &tmp);
153 krb5_free_addresses (context, &tmp);
154 }
155
156 krb5_kdc_configuration *
configure(krb5_context context,int argc,char ** argv,int * optidx)157 configure(krb5_context context, int argc, char **argv, int *optidx)
158 {
159 krb5_kdc_configuration *config;
160 krb5_error_code ret;
161
162 const char *p;
163
164 *optidx = 0;
165
166 while (getarg(args, num_args, argc, argv, optidx))
167 warnx("error at argument `%s'", argv[*optidx]);
168
169 if (help_flag)
170 usage (0);
171
172 if (version_flag) {
173 print_version(NULL);
174 exit(0);
175 }
176
177 if (builtin_hdb_flag) {
178 char *list;
179 ret = hdb_list_builtin(context, &list);
180 if (ret)
181 krb5_err(context, 1, ret, "listing builtin hdb backends");
182 printf("builtin hdb backends: %s\n", list);
183 free(list);
184 exit(0);
185 }
186
187 if(detach_from_console == -1)
188 detach_from_console = krb5_config_get_bool_default(context, NULL,
189 FALSE,
190 "kdc",
191 "detach", NULL);
192
193 if (detach_from_console && daemon_child == -1)
194 roken_detach_prep(argc, argv, "--daemon-child");
195
196 {
197 char **files;
198 int aret;
199
200 if (config_file == NULL) {
201 aret = asprintf(&config_file, "%s/kdc.conf", hdb_db_dir(context));
202 if (aret == -1 || config_file == NULL)
203 errx(1, "out of memory");
204 }
205
206 ret = krb5_prepend_config_files_default(config_file, &files);
207 if (ret)
208 krb5_err(context, 1, ret, "getting configuration files");
209
210 ret = krb5_set_config_files(context, files);
211 krb5_free_config_files(files);
212 if(ret)
213 krb5_err(context, 1, ret, "reading configuration files");
214 }
215
216 ret = krb5_kdc_get_config(context, &config);
217 if (ret)
218 krb5_err(context, 1, ret, "krb5_kdc_default_config");
219
220 kdc_openlog(context, "kdc", config);
221
222 ret = krb5_kdc_set_dbinfo(context, config);
223 if (ret)
224 krb5_err(context, 1, ret, "krb5_kdc_set_dbinfo");
225
226 if(max_request_str)
227 max_request_tcp = max_request_udp = parse_bytes(max_request_str, NULL);
228
229 if(max_request_tcp == 0){
230 p = krb5_config_get_string (context,
231 NULL,
232 "kdc",
233 "max-request",
234 NULL);
235 if(p)
236 max_request_tcp = max_request_udp = parse_bytes(p, NULL);
237 }
238
239 if(require_preauth != -1)
240 config->require_preauth = require_preauth;
241
242 if(port_str == NULL){
243 p = krb5_config_get_string(context, NULL, "kdc", "ports", NULL);
244 if (p != NULL)
245 port_str = strdup(p);
246 }
247
248 explicit_addresses.len = 0;
249
250 if (addresses_str.num_strings) {
251 int i;
252
253 for (i = 0; i < addresses_str.num_strings; ++i)
254 add_one_address (context, addresses_str.strings[i], i == 0);
255 free_getarg_strings (&addresses_str);
256 } else {
257 char **foo = krb5_config_get_strings (context, NULL,
258 "kdc", "addresses", NULL);
259
260 if (foo != NULL) {
261 add_one_address (context, *foo++, TRUE);
262 while (*foo)
263 add_one_address (context, *foo++, FALSE);
264 }
265 }
266
267 if(enable_http == -1)
268 enable_http = krb5_config_get_bool(context, NULL, "kdc",
269 "enable-http", NULL);
270
271 if(request_log == NULL)
272 request_log = krb5_config_get_string(context, NULL,
273 "kdc",
274 "kdc-request-log",
275 NULL);
276
277 if (krb5_config_get_string(context, NULL, "kdc",
278 "enforce-transited-policy", NULL))
279 krb5_errx(context, 1, "enforce-transited-policy deprecated, "
280 "use [kdc]transited-policy instead");
281
282 if(max_request_tcp == 0)
283 max_request_tcp = 64 * 1024;
284 if(max_request_udp == 0)
285 max_request_udp = 64 * 1024;
286
287 if (port_str == NULL)
288 port_str = "+";
289
290 if(disable_des == -1)
291 disable_des = krb5_config_get_bool_default(context, NULL,
292 FALSE,
293 "kdc",
294 "disable-des", NULL);
295 if(disable_des) {
296 krb5_enctype_disable(context, ETYPE_DES_CBC_CRC);
297 krb5_enctype_disable(context, ETYPE_DES_CBC_MD4);
298 krb5_enctype_disable(context, ETYPE_DES_CBC_MD5);
299 krb5_enctype_disable(context, ETYPE_DES_CBC_NONE);
300 krb5_enctype_disable(context, ETYPE_DES_CFB64_NONE);
301 krb5_enctype_disable(context, ETYPE_DES_PCBC_NONE);
302 }
303
304 krb5_kdc_windc_init(context);
305
306 krb5_kdc_pkinit_config(context, config);
307
308 return config;
309 }
310