1 /* 2 * Copyright (c) 1997-2003 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "kdc_locl.h" 35 #include <getarg.h> 36 #include <parse_bytes.h> 37 38 RCSID("$Id: config.c,v 1.46.2.2 2003/10/27 11:06:52 joda Exp $"); 39 40 static const char *config_file; /* location of kdc config file */ 41 42 int require_preauth = -1; /* 1 == require preauth for all principals */ 43 44 size_t max_request; /* maximal size of a request */ 45 46 static char *max_request_str; /* `max_request' as a string */ 47 48 time_t kdc_warn_pwexpire; /* time before expiration to print a warning */ 49 50 struct dbinfo *databases; 51 HDB **db; 52 int num_db; 53 54 const char *port_str; 55 56 #ifdef HAVE_DAEMON 57 int detach_from_console = -1; 58 #define DETACH_IS_DEFAULT FALSE 59 #endif 60 61 int enable_http = -1; 62 krb5_boolean encode_as_rep_as_tgs_rep; /* bug compatibility */ 63 64 krb5_boolean check_ticket_addresses; 65 krb5_boolean allow_null_ticket_addresses; 66 krb5_boolean allow_anonymous; 67 int trpolicy; 68 static const char *trpolicy_str; 69 70 static struct getarg_strings addresses_str; /* addresses to listen on */ 71 krb5_addresses explicit_addresses; 72 73 #ifdef KRB4 74 char *v4_realm; 75 int enable_v4 = -1; 76 int enable_kaserver = -1; 77 #endif 78 79 int enable_524 = -1; 80 int enable_v4_cross_realm = -1; 81 82 static int help_flag; 83 static int version_flag; 84 85 static struct getargs args[] = { 86 { 87 "config-file", 'c', arg_string, &config_file, 88 "location of config file", "file" 89 }, 90 { 91 "require-preauth", 'p', arg_negative_flag, &require_preauth, 92 "don't require pa-data in as-reqs" 93 }, 94 { 95 "max-request", 0, arg_string, &max_request, 96 "max size for a kdc-request", "size" 97 }, 98 #if 0 99 { 100 "database", 'd', arg_string, &databases, 101 "location of database", "database" 102 }, 103 #endif 104 { "enable-http", 'H', arg_flag, &enable_http, "turn on HTTP support" }, 105 { "524", 0, arg_negative_flag, &enable_524, 106 "don't respond to 524 requests" 107 }, 108 #ifdef KRB4 109 { 110 "kaserver", 'K', arg_flag, &enable_kaserver, 111 "enable kaserver support" 112 }, 113 { "kerberos4", 0, arg_flag, &enable_v4, 114 "respond to kerberos 4 requests" 115 }, 116 { 117 "v4-realm", 'r', arg_string, &v4_realm, 118 "realm to serve v4-requests for" 119 }, 120 #endif 121 { "kerberos4-cross-realm", 0, arg_flag, 122 &enable_v4_cross_realm, 123 "respond to kerberos 4 requests from foreign realms" 124 }, 125 { "ports", 'P', arg_string, &port_str, 126 "ports to listen to", "portspec" 127 }, 128 #ifdef HAVE_DAEMON 129 #if DETACH_IS_DEFAULT 130 { 131 "detach", 'D', arg_negative_flag, &detach_from_console, 132 "don't detach from console" 133 }, 134 #else 135 { 136 "detach", 0 , arg_flag, &detach_from_console, 137 "detach from console" 138 }, 139 #endif 140 #endif 141 { "addresses", 0, arg_strings, &addresses_str, 142 "addresses to listen on", "list of addresses" }, 143 { "help", 'h', arg_flag, &help_flag }, 144 { "version", 'v', arg_flag, &version_flag } 145 }; 146 147 static int num_args = sizeof(args) / sizeof(args[0]); 148 149 static void 150 usage(int ret) 151 { 152 arg_printusage (args, num_args, NULL, ""); 153 exit (ret); 154 } 155 156 static void 157 get_dbinfo(void) 158 { 159 const krb5_config_binding *top_binding = NULL; 160 const krb5_config_binding *db_binding; 161 const krb5_config_binding *default_binding = NULL; 162 struct dbinfo *di, **dt; 163 const char *default_dbname = HDB_DEFAULT_DB; 164 const char *default_mkey = HDB_DB_DIR "/m-key"; 165 const char *p; 166 167 databases = NULL; 168 dt = &databases; 169 while((db_binding = (const krb5_config_binding *) 170 krb5_config_get_next(context, NULL, &top_binding, 171 krb5_config_list, 172 "kdc", 173 "database", 174 NULL))) { 175 p = krb5_config_get_string(context, db_binding, "realm", NULL); 176 if(p == NULL) { 177 if(default_binding) { 178 krb5_warnx(context, "WARNING: more than one realm-less " 179 "database specification"); 180 krb5_warnx(context, "WARNING: using the first encountered"); 181 } else 182 default_binding = db_binding; 183 continue; 184 } 185 di = calloc(1, sizeof(*di)); 186 di->realm = strdup(p); 187 p = krb5_config_get_string(context, db_binding, "dbname", NULL); 188 if(p) 189 di->dbname = strdup(p); 190 p = krb5_config_get_string(context, db_binding, "mkey_file", NULL); 191 if(p) 192 di->mkey_file = strdup(p); 193 *dt = di; 194 dt = &di->next; 195 } 196 if(default_binding) { 197 di = calloc(1, sizeof(*di)); 198 p = krb5_config_get_string(context, default_binding, "dbname", NULL); 199 if(p) { 200 di->dbname = strdup(p); 201 default_dbname = p; 202 } 203 p = krb5_config_get_string(context, default_binding, "mkey_file", NULL); 204 if(p) { 205 di->mkey_file = strdup(p); 206 default_mkey = p; 207 } 208 *dt = di; 209 dt = &di->next; 210 } else if(databases == NULL) { 211 /* if there are none specified, use some default */ 212 di = calloc(1, sizeof(*di)); 213 di->dbname = strdup(default_dbname); 214 di->mkey_file = strdup(default_mkey); 215 *dt = di; 216 dt = &di->next; 217 } 218 for(di = databases; di; di = di->next) { 219 if(di->dbname == NULL) 220 di->dbname = strdup(default_dbname); 221 if(di->mkey_file == NULL) { 222 p = strrchr(di->dbname, '.'); 223 if(p == NULL || strchr(p, '/') != NULL) 224 /* final pathname component does not contain a . */ 225 asprintf(&di->mkey_file, "%s.mkey", di->dbname); 226 else 227 /* the filename is something.else, replace .else with 228 .mkey */ 229 asprintf(&di->mkey_file, "%.*s.mkey", 230 (int)(p - di->dbname), di->dbname); 231 } 232 } 233 } 234 235 static void 236 add_one_address (const char *str, int first) 237 { 238 krb5_error_code ret; 239 krb5_addresses tmp; 240 241 ret = krb5_parse_address (context, str, &tmp); 242 if (ret) 243 krb5_err (context, 1, ret, "parse_address `%s'", str); 244 if (first) 245 krb5_copy_addresses(context, &tmp, &explicit_addresses); 246 else 247 krb5_append_addresses(context, &explicit_addresses, &tmp); 248 krb5_free_addresses (context, &tmp); 249 } 250 251 void 252 configure(int argc, char **argv) 253 { 254 int optind = 0; 255 int e; 256 const char *p; 257 258 while((e = getarg(args, num_args, argc, argv, &optind))) 259 warnx("error at argument `%s'", argv[optind]); 260 261 if(help_flag) 262 usage (0); 263 264 if (version_flag) { 265 print_version(NULL); 266 exit(0); 267 } 268 269 argc -= optind; 270 argv += optind; 271 272 if (argc != 0) 273 usage(1); 274 275 { 276 krb5_error_code ret; 277 char **files; 278 char *tmp; 279 if(config_file == NULL) 280 config_file = _PATH_KDC_CONF; 281 asprintf(&tmp, "%s:%s", config_file, krb5_config_file); 282 if(tmp == NULL) 283 krb5_errx(context, 1, "out of memory"); 284 285 krb5_config_file = tmp; 286 287 ret = krb5_get_default_config_files(&files); 288 if(ret) 289 krb5_err(context, 1, ret, "reading configuration files"); 290 ret = krb5_set_config_files(context, files); 291 krb5_free_config_files(files); 292 if(ret) 293 krb5_err(context, 1, ret, "reading configuration files"); 294 } 295 296 get_dbinfo(); 297 298 if(max_request_str) 299 max_request = parse_bytes(max_request_str, NULL); 300 301 if(max_request == 0){ 302 p = krb5_config_get_string (context, 303 NULL, 304 "kdc", 305 "max-request", 306 NULL); 307 if(p) 308 max_request = parse_bytes(p, NULL); 309 } 310 311 if(require_preauth == -1) 312 require_preauth = krb5_config_get_bool(context, NULL, "kdc", 313 "require-preauth", NULL); 314 315 if(port_str == NULL){ 316 p = krb5_config_get_string(context, NULL, "kdc", "ports", NULL); 317 if (p != NULL) 318 port_str = strdup(p); 319 } 320 321 explicit_addresses.len = 0; 322 323 if (addresses_str.num_strings) { 324 int i; 325 326 for (i = 0; i < addresses_str.num_strings; ++i) 327 add_one_address (addresses_str.strings[i], i == 0); 328 free_getarg_strings (&addresses_str); 329 } else { 330 char **foo = krb5_config_get_strings (context, NULL, 331 "kdc", "addresses", NULL); 332 333 if (foo != NULL) { 334 add_one_address (*foo++, TRUE); 335 while (*foo) 336 add_one_address (*foo++, FALSE); 337 } 338 } 339 340 #ifdef KRB4 341 if(enable_v4 == -1) 342 enable_v4 = krb5_config_get_bool_default(context, NULL, FALSE, "kdc", 343 "enable-kerberos4", NULL); 344 #else 345 #define enable_v4 0 346 #endif 347 if(enable_v4_cross_realm == -1) 348 enable_v4_cross_realm = 349 krb5_config_get_bool_default(context, NULL, 350 FALSE, "kdc", 351 "enable-kerberos4-cross-realm", 352 NULL); 353 if(enable_524 == -1) 354 enable_524 = krb5_config_get_bool_default(context, NULL, enable_v4, 355 "kdc", "enable-524", NULL); 356 357 if(enable_http == -1) 358 enable_http = krb5_config_get_bool(context, NULL, "kdc", 359 "enable-http", NULL); 360 check_ticket_addresses = 361 krb5_config_get_bool_default(context, NULL, TRUE, "kdc", 362 "check-ticket-addresses", NULL); 363 allow_null_ticket_addresses = 364 krb5_config_get_bool_default(context, NULL, TRUE, "kdc", 365 "allow-null-ticket-addresses", NULL); 366 367 allow_anonymous = 368 krb5_config_get_bool(context, NULL, "kdc", 369 "allow-anonymous", NULL); 370 trpolicy_str = 371 krb5_config_get_string_default(context, NULL, "always-check", "kdc", 372 "transited-policy", NULL); 373 if(strcasecmp(trpolicy_str, "always-check") == 0) 374 trpolicy = TRPOLICY_ALWAYS_CHECK; 375 else if(strcasecmp(trpolicy_str, "allow-per-principal") == 0) 376 trpolicy = TRPOLICY_ALLOW_PER_PRINCIPAL; 377 else if(strcasecmp(trpolicy_str, "always-honour-request") == 0) 378 trpolicy = TRPOLICY_ALWAYS_HONOUR_REQUEST; 379 else { 380 kdc_log(0, "unknown transited-policy: %s, reverting to always-check", 381 trpolicy_str); 382 trpolicy = TRPOLICY_ALWAYS_CHECK; 383 } 384 385 krb5_config_get_bool_default(context, NULL, TRUE, "kdc", 386 "enforce-transited-policy", NULL); 387 #ifdef KRB4 388 if(v4_realm == NULL){ 389 p = krb5_config_get_string (context, NULL, 390 "kdc", 391 "v4-realm", 392 NULL); 393 if(p != NULL) { 394 v4_realm = strdup(p); 395 if (v4_realm == NULL) 396 krb5_errx(context, 1, "out of memory"); 397 } 398 } 399 if (enable_kaserver == -1) 400 enable_kaserver = krb5_config_get_bool_default(context, NULL, FALSE, 401 "kdc", 402 "enable-kaserver", 403 NULL); 404 #endif 405 406 encode_as_rep_as_tgs_rep = krb5_config_get_bool(context, NULL, "kdc", 407 "encode_as_rep_as_tgs_rep", 408 NULL); 409 410 kdc_warn_pwexpire = krb5_config_get_time (context, NULL, 411 "kdc", 412 "kdc_warn_pwexpire", 413 NULL); 414 415 #ifdef HAVE_DAEMON 416 if(detach_from_console == -1) 417 detach_from_console = krb5_config_get_bool_default(context, NULL, 418 DETACH_IS_DEFAULT, 419 "kdc", 420 "detach", NULL); 421 #endif 422 kdc_openlog(); 423 if(max_request == 0) 424 max_request = 64 * 1024; 425 if(require_preauth == -1) 426 require_preauth = 1; 427 if (port_str == NULL) 428 port_str = "+"; 429 #ifdef KRB4 430 if(v4_realm == NULL){ 431 v4_realm = malloc(40); /* REALM_SZ */ 432 if (v4_realm == NULL) 433 krb5_errx(context, 1, "out of memory"); 434 krb_get_lrealm(v4_realm, 1); 435 } 436 #endif 437 } 438