1 /* 2 * Copyright (c) 1997-2000 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 1.30 2000/02/11 17:47:19 assar 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 62 static struct getarg_strings addresses_str; /* addresses to listen on */ 63 krb5_addresses explicit_addresses; 64 65 #ifdef KRB4 66 char *v4_realm; 67 #endif 68 #ifdef KASERVER 69 krb5_boolean enable_kaserver = -1; 70 #endif 71 72 static int help_flag; 73 static int version_flag; 74 75 static struct getargs args[] = { 76 { 77 "config-file", 'c', arg_string, &config_file, 78 "location of config file", "file" 79 }, 80 { 81 "require-preauth", 'p', arg_negative_flag, &require_preauth, 82 "don't require pa-data in as-reqs" 83 }, 84 { 85 "max-request", 0, arg_string, &max_request, 86 "max size for a kdc-request", "size" 87 }, 88 #if 0 89 { 90 "database", 'd', arg_string, &databases, 91 "location of database", "database" 92 }, 93 #endif 94 { "enable-http", 'H', arg_flag, &enable_http, "turn on HTTP support" }, 95 #ifdef KRB4 96 { 97 "v4-realm", 'r', arg_string, &v4_realm, 98 "realm to serve v4-requests for" 99 }, 100 #endif 101 #ifdef KASERVER 102 { 103 "kaserver", 'K', arg_negative_flag, &enable_kaserver, 104 "turn off kaserver support" 105 }, 106 #endif 107 { "ports", 'P', arg_string, &port_str, 108 "ports to listen to" 109 }, 110 { "addresses", 0, arg_strings, &addresses_str, 111 "addresses to listen on", "list of addresses" }, 112 { "help", 'h', arg_flag, &help_flag }, 113 { "version", 'v', arg_flag, &version_flag } 114 }; 115 116 static int num_args = sizeof(args) / sizeof(args[0]); 117 118 static void 119 usage(int ret) 120 { 121 arg_printusage (args, num_args, NULL, ""); 122 exit (ret); 123 } 124 125 static void 126 get_dbinfo(krb5_config_section *cf) 127 { 128 krb5_config_binding *top_binding = NULL; 129 krb5_config_binding *db_binding; 130 krb5_config_binding *default_binding = NULL; 131 struct dbinfo *di, **dt; 132 const char *default_dbname = HDB_DEFAULT_DB; 133 const char *default_mkey = HDB_DB_DIR "/m-key"; 134 const char *p; 135 136 databases = NULL; 137 dt = &databases; 138 while((db_binding = (krb5_config_binding *) 139 krb5_config_get_next(context, cf, &top_binding, 140 krb5_config_list, 141 "kdc", 142 "database", 143 NULL))) { 144 p = krb5_config_get_string(context, db_binding, "realm", NULL); 145 if(p == NULL) { 146 if(default_binding) { 147 krb5_warnx(context, "WARNING: more than one realm-less " 148 "database specification"); 149 krb5_warnx(context, "WARNING: using the first encountered"); 150 } else 151 default_binding = db_binding; 152 continue; 153 } 154 di = calloc(1, sizeof(*di)); 155 di->realm = strdup(p); 156 p = krb5_config_get_string(context, db_binding, "dbname", NULL); 157 if(p) 158 di->dbname = strdup(p); 159 p = krb5_config_get_string(context, db_binding, "mkey_file", NULL); 160 if(p) 161 di->mkey_file = strdup(p); 162 *dt = di; 163 dt = &di->next; 164 } 165 if(default_binding) { 166 di = calloc(1, sizeof(*di)); 167 p = krb5_config_get_string(context, default_binding, "dbname", NULL); 168 if(p) { 169 di->dbname = strdup(p); 170 default_dbname = p; 171 } 172 p = krb5_config_get_string(context, default_binding, "mkey_file", NULL); 173 if(p) { 174 di->mkey_file = strdup(p); 175 default_mkey = p; 176 } 177 *dt = di; 178 dt = &di->next; 179 } else { 180 di = calloc(1, sizeof(*di)); 181 di->dbname = strdup(default_dbname); 182 di->mkey_file = strdup(default_mkey); 183 *dt = di; 184 dt = &di->next; 185 } 186 for(di = databases; di; di = di->next) { 187 if(di->dbname == NULL) 188 di->dbname = strdup(default_dbname); 189 if(di->mkey_file == NULL) { 190 p = strrchr(di->dbname, '.'); 191 if(p == NULL || strchr(p, '/') != NULL) 192 asprintf(&di->mkey_file, "%s.mkey", di->dbname); 193 else 194 asprintf(&di->mkey_file, "%.*s.mkey", 195 (int)(p - di->dbname), di->dbname); 196 } 197 } 198 } 199 200 static void 201 add_one_address (const char *str, int first) 202 { 203 krb5_error_code ret; 204 krb5_addresses tmp; 205 206 ret = krb5_parse_address (context, str, &tmp); 207 if (ret) 208 krb5_err (context, 1, ret, "parse_address `%s'", str); 209 if (first) 210 krb5_copy_addresses(context, &tmp, &explicit_addresses); 211 else 212 krb5_append_addresses(context, &explicit_addresses, &tmp); 213 krb5_free_addresses (context, &tmp); 214 } 215 216 void 217 configure(int argc, char **argv) 218 { 219 krb5_config_section *cf = NULL; 220 int optind = 0; 221 int e; 222 const char *p; 223 224 while((e = getarg(args, num_args, argc, argv, &optind))) 225 warnx("error at argument `%s'", argv[optind]); 226 227 if(help_flag) 228 usage (0); 229 230 if (version_flag) { 231 print_version(NULL); 232 exit(0); 233 } 234 235 argc -= optind; 236 argv += optind; 237 238 if (argc != 0) 239 usage(1); 240 241 if(config_file == NULL) 242 config_file = HDB_DB_DIR "/kdc.conf"; 243 244 if(krb5_config_parse_file(config_file, &cf)) 245 cf = NULL; 246 247 get_dbinfo(cf); 248 249 if(max_request_str){ 250 max_request = parse_bytes(max_request_str, NULL); 251 } 252 253 if(max_request == 0){ 254 p = krb5_config_get_string (context, 255 cf, 256 "kdc", 257 "max-request", 258 NULL); 259 if(p) 260 max_request = parse_bytes(p, NULL); 261 } 262 263 if(require_preauth == -1) 264 require_preauth = krb5_config_get_bool(context, cf, "kdc", 265 "require-preauth", NULL); 266 267 if(port_str == NULL){ 268 p = krb5_config_get_string(context, cf, "kdc", "ports", NULL); 269 if (p != NULL) 270 port_str = strdup(p); 271 } 272 273 explicit_addresses.len = 0; 274 275 if (addresses_str.num_strings) { 276 int i; 277 278 for (i = 0; i < addresses_str.num_strings; ++i) 279 add_one_address (addresses_str.strings[i], i == 0); 280 } else { 281 char **foo = krb5_config_get_strings (context, cf, 282 "kdc", "addresses", NULL); 283 284 if (foo != NULL) { 285 add_one_address (*foo++, TRUE); 286 while (*foo) 287 add_one_address (*foo++, FALSE); 288 } 289 } 290 291 if(enable_http == -1) 292 enable_http = krb5_config_get_bool(context, cf, "kdc", 293 "enable-http", NULL); 294 check_ticket_addresses = 295 krb5_config_get_bool(context, cf, "kdc", 296 "check-ticket-addresses", NULL); 297 allow_null_ticket_addresses = 298 krb5_config_get_bool(context, cf, "kdc", 299 "allow-null-ticket-addresses", NULL); 300 #ifdef KRB4 301 if(v4_realm == NULL){ 302 p = krb5_config_get_string (context, cf, 303 "kdc", 304 "v4-realm", 305 NULL); 306 if(p) 307 v4_realm = strdup(p); 308 } 309 #endif 310 #ifdef KASERVER 311 if (enable_kaserver == -1) 312 enable_kaserver = krb5_config_get_bool_default(context, cf, TRUE, 313 "kdc", 314 "enable-kaserver", 315 NULL); 316 #endif 317 318 encode_as_rep_as_tgs_rep = krb5_config_get_bool(context, cf, "kdc", 319 "encode_as_rep_as_tgs_rep", 320 NULL); 321 322 kdc_warn_pwexpire = krb5_config_get_time (context, cf, 323 "kdc", 324 "kdc_warn_pwexpire", 325 NULL); 326 kdc_openlog(cf); 327 if(cf) 328 krb5_config_file_free (context, cf); 329 if(max_request == 0) 330 max_request = 64 * 1024; 331 if(require_preauth == -1) 332 require_preauth = 1; 333 if (port_str == NULL) 334 port_str = "+"; 335 #ifdef KRB4 336 if(v4_realm == NULL){ 337 v4_realm = malloc(40); /* REALM_SZ */ 338 krb_get_lrealm(v4_realm, 1); 339 } 340 #endif 341 } 342