1 /* 2 * Copyright (c) 1997-2002 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 1.39 2002/02/04 10:53:48 joda Exp $"); 39 40 static 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 char *port_str; 55 56 int enable_http = -1; 57 krb5_boolean encode_as_rep_as_tgs_rep; /* bug compatibility */ 58 59 krb5_boolean check_ticket_addresses; 60 krb5_boolean allow_null_ticket_addresses; 61 krb5_boolean allow_anonymous; 62 63 static struct getarg_strings addresses_str; /* addresses to listen on */ 64 krb5_addresses explicit_addresses; 65 66 #ifdef KRB4 67 char *v4_realm; 68 int enable_v4 = -1; 69 int enable_524 = -1; 70 int enable_kaserver = -1; 71 #endif 72 73 static int help_flag; 74 static int version_flag; 75 76 static struct getargs args[] = { 77 { 78 "config-file", 'c', arg_string, &config_file, 79 "location of config file", "file" 80 }, 81 { 82 "require-preauth", 'p', arg_negative_flag, &require_preauth, 83 "don't require pa-data in as-reqs" 84 }, 85 { 86 "max-request", 0, arg_string, &max_request, 87 "max size for a kdc-request", "size" 88 }, 89 #if 0 90 { 91 "database", 'd', arg_string, &databases, 92 "location of database", "database" 93 }, 94 #endif 95 { "enable-http", 'H', arg_flag, &enable_http, "turn on HTTP support" }, 96 #ifdef KRB4 97 { "kerberos4", 0, arg_negative_flag, &enable_v4, 98 "don't respond to kerberos 4 requests" 99 }, 100 { "524", 0, arg_negative_flag, &enable_524, 101 "don't respond to 524 requests" 102 }, 103 { 104 "v4-realm", 'r', arg_string, &v4_realm, 105 "realm to serve v4-requests for" 106 }, 107 { 108 "kaserver", 'K', arg_flag, &enable_kaserver, 109 "enable kaserver support" 110 }, 111 #endif 112 { "ports", 'P', arg_string, &port_str, 113 "ports to listen to", "portspec" 114 }, 115 { "addresses", 0, arg_strings, &addresses_str, 116 "addresses to listen on", "list of addresses" }, 117 { "help", 'h', arg_flag, &help_flag }, 118 { "version", 'v', arg_flag, &version_flag } 119 }; 120 121 static int num_args = sizeof(args) / sizeof(args[0]); 122 123 static void 124 usage(int ret) 125 { 126 arg_printusage (args, num_args, NULL, ""); 127 exit (ret); 128 } 129 130 static void 131 get_dbinfo(krb5_config_section *cf) 132 { 133 krb5_config_binding *top_binding = NULL; 134 krb5_config_binding *db_binding; 135 krb5_config_binding *default_binding = NULL; 136 struct dbinfo *di, **dt; 137 const char *default_dbname = HDB_DEFAULT_DB; 138 const char *default_mkey = HDB_DB_DIR "/m-key"; 139 const char *p; 140 141 databases = NULL; 142 dt = &databases; 143 while((db_binding = (krb5_config_binding *) 144 krb5_config_get_next(context, cf, &top_binding, 145 krb5_config_list, 146 "kdc", 147 "database", 148 NULL))) { 149 p = krb5_config_get_string(context, db_binding, "realm", NULL); 150 if(p == NULL) { 151 if(default_binding) { 152 krb5_warnx(context, "WARNING: more than one realm-less " 153 "database specification"); 154 krb5_warnx(context, "WARNING: using the first encountered"); 155 } else 156 default_binding = db_binding; 157 continue; 158 } 159 di = calloc(1, sizeof(*di)); 160 di->realm = strdup(p); 161 p = krb5_config_get_string(context, db_binding, "dbname", NULL); 162 if(p) 163 di->dbname = strdup(p); 164 p = krb5_config_get_string(context, db_binding, "mkey_file", NULL); 165 if(p) 166 di->mkey_file = strdup(p); 167 *dt = di; 168 dt = &di->next; 169 } 170 if(default_binding) { 171 di = calloc(1, sizeof(*di)); 172 p = krb5_config_get_string(context, default_binding, "dbname", NULL); 173 if(p) { 174 di->dbname = strdup(p); 175 default_dbname = p; 176 } 177 p = krb5_config_get_string(context, default_binding, "mkey_file", NULL); 178 if(p) { 179 di->mkey_file = strdup(p); 180 default_mkey = p; 181 } 182 *dt = di; 183 dt = &di->next; 184 } else if(databases == NULL) { 185 /* if there are none specified, use some default */ 186 di = calloc(1, sizeof(*di)); 187 di->dbname = strdup(default_dbname); 188 di->mkey_file = strdup(default_mkey); 189 *dt = di; 190 dt = &di->next; 191 } 192 for(di = databases; di; di = di->next) { 193 if(di->dbname == NULL) 194 di->dbname = strdup(default_dbname); 195 if(di->mkey_file == NULL) { 196 p = strrchr(di->dbname, '.'); 197 if(p == NULL || strchr(p, '/') != NULL) 198 /* final pathname component does not contain a . */ 199 asprintf(&di->mkey_file, "%s.mkey", di->dbname); 200 else 201 /* the filename is something.else, replace .else with 202 .mkey */ 203 asprintf(&di->mkey_file, "%.*s.mkey", 204 (int)(p - di->dbname), di->dbname); 205 } 206 } 207 } 208 209 static void 210 add_one_address (const char *str, int first) 211 { 212 krb5_error_code ret; 213 krb5_addresses tmp; 214 215 ret = krb5_parse_address (context, str, &tmp); 216 if (ret) 217 krb5_err (context, 1, ret, "parse_address `%s'", str); 218 if (first) 219 krb5_copy_addresses(context, &tmp, &explicit_addresses); 220 else 221 krb5_append_addresses(context, &explicit_addresses, &tmp); 222 krb5_free_addresses (context, &tmp); 223 } 224 225 void 226 configure(int argc, char **argv) 227 { 228 krb5_config_section *cf = NULL; 229 int optind = 0; 230 int e; 231 const char *p; 232 233 while((e = getarg(args, num_args, argc, argv, &optind))) 234 warnx("error at argument `%s'", argv[optind]); 235 236 if(help_flag) 237 usage (0); 238 239 if (version_flag) { 240 print_version(NULL); 241 exit(0); 242 } 243 244 argc -= optind; 245 argv += optind; 246 247 if (argc != 0) 248 usage(1); 249 250 if(config_file == NULL) 251 config_file = _PATH_KDC_CONF; 252 253 if(krb5_config_parse_file(context, config_file, &cf)) 254 cf = NULL; 255 256 get_dbinfo(cf); 257 258 if(max_request_str){ 259 max_request = parse_bytes(max_request_str, NULL); 260 } 261 262 if(max_request == 0){ 263 p = krb5_config_get_string (context, 264 cf, 265 "kdc", 266 "max-request", 267 NULL); 268 if(p) 269 max_request = parse_bytes(p, NULL); 270 } 271 272 if(require_preauth == -1) 273 require_preauth = krb5_config_get_bool(context, cf, "kdc", 274 "require-preauth", NULL); 275 276 if(port_str == NULL){ 277 p = krb5_config_get_string(context, cf, "kdc", "ports", NULL); 278 if (p != NULL) 279 port_str = strdup(p); 280 } 281 282 explicit_addresses.len = 0; 283 284 if (addresses_str.num_strings) { 285 int i; 286 287 for (i = 0; i < addresses_str.num_strings; ++i) 288 add_one_address (addresses_str.strings[i], i == 0); 289 free_getarg_strings (&addresses_str); 290 } else { 291 char **foo = krb5_config_get_strings (context, cf, 292 "kdc", "addresses", NULL); 293 294 if (foo != NULL) { 295 add_one_address (*foo++, TRUE); 296 while (*foo) 297 add_one_address (*foo++, FALSE); 298 } 299 } 300 301 #ifdef KRB4 302 if(enable_v4 == -1) 303 enable_v4 = krb5_config_get_bool_default(context, cf, TRUE, "kdc", 304 "enable-kerberos4", NULL); 305 if(enable_524 == -1) 306 enable_524 = krb5_config_get_bool_default(context, cf, enable_v4, 307 "kdc", "enable-524", NULL); 308 #endif 309 310 if(enable_http == -1) 311 enable_http = krb5_config_get_bool(context, cf, "kdc", 312 "enable-http", NULL); 313 check_ticket_addresses = 314 krb5_config_get_bool_default(context, cf, TRUE, "kdc", 315 "check-ticket-addresses", NULL); 316 allow_null_ticket_addresses = 317 krb5_config_get_bool_default(context, cf, TRUE, "kdc", 318 "allow-null-ticket-addresses", NULL); 319 320 allow_anonymous = 321 krb5_config_get_bool(context, cf, "kdc", 322 "allow-anonymous", NULL); 323 #ifdef KRB4 324 if(v4_realm == NULL){ 325 p = krb5_config_get_string (context, cf, 326 "kdc", 327 "v4-realm", 328 NULL); 329 if(p) 330 v4_realm = strdup(p); 331 } 332 if (enable_kaserver == -1) 333 enable_kaserver = krb5_config_get_bool_default(context, cf, FALSE, 334 "kdc", 335 "enable-kaserver", 336 NULL); 337 #endif 338 339 encode_as_rep_as_tgs_rep = krb5_config_get_bool(context, cf, "kdc", 340 "encode_as_rep_as_tgs_rep", 341 NULL); 342 343 kdc_warn_pwexpire = krb5_config_get_time (context, cf, 344 "kdc", 345 "kdc_warn_pwexpire", 346 NULL); 347 kdc_openlog(cf); 348 if(cf) 349 krb5_config_file_free (context, cf); 350 if(max_request == 0) 351 max_request = 64 * 1024; 352 if(require_preauth == -1) 353 require_preauth = 1; 354 if (port_str == NULL) 355 port_str = "+"; 356 #ifdef KRB4 357 if(v4_realm == NULL){ 358 v4_realm = malloc(40); /* REALM_SZ */ 359 krb_get_lrealm(v4_realm, 1); 360 } 361 #endif 362 } 363