1 /* 2 * Copyright (c) 1997-2007 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * 3. Neither the name of the Institute nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include "kdc_locl.h" 36 #include <getarg.h> 37 #include <parse_bytes.h> 38 39 RCSID("$Id: config.c 22248 2007-12-08 23:52:12Z lha $"); 40 41 struct dbinfo { 42 char *realm; 43 char *dbname; 44 char *mkey_file; 45 struct dbinfo *next; 46 }; 47 48 static char *config_file; /* location of kdc config file */ 49 50 static int require_preauth = -1; /* 1 == require preauth for all principals */ 51 static char *max_request_str; /* `max_request' as a string */ 52 53 static int disable_des = -1; 54 static int enable_v4 = -1; 55 static int enable_kaserver = -1; 56 static int enable_524 = -1; 57 static int enable_v4_cross_realm = -1; 58 59 static int builtin_hdb_flag; 60 static int help_flag; 61 static int version_flag; 62 63 static struct getarg_strings addresses_str; /* addresses to listen on */ 64 65 static char *v4_realm; 66 67 static struct getargs args[] = { 68 { 69 "config-file", 'c', arg_string, &config_file, 70 "location of config file", "file" 71 }, 72 { 73 "require-preauth", 'p', arg_negative_flag, &require_preauth, 74 "don't require pa-data in as-reqs" 75 }, 76 { 77 "max-request", 0, arg_string, &max_request, 78 "max size for a kdc-request", "size" 79 }, 80 { "enable-http", 'H', arg_flag, &enable_http, "turn on HTTP support" }, 81 { "524", 0, arg_negative_flag, &enable_524, 82 "don't respond to 524 requests" 83 }, 84 { 85 "kaserver", 'K', arg_flag, &enable_kaserver, 86 "enable kaserver support" 87 }, 88 { "kerberos4", 0, arg_flag, &enable_v4, 89 "respond to kerberos 4 requests" 90 }, 91 { 92 "v4-realm", 'r', arg_string, &v4_realm, 93 "realm to serve v4-requests for" 94 }, 95 { "kerberos4-cross-realm", 0, arg_flag, 96 &enable_v4_cross_realm, 97 "respond to kerberos 4 requests from foreign realms" 98 }, 99 { "ports", 'P', arg_string, &port_str, 100 "ports to listen to", "portspec" 101 }, 102 #if DETACH_IS_DEFAULT 103 { 104 "detach", 'D', arg_negative_flag, &detach_from_console, 105 "don't detach from console" 106 }, 107 #else 108 { 109 "detach", 0 , arg_flag, &detach_from_console, 110 "detach from console" 111 }, 112 #endif 113 { "addresses", 0, arg_strings, &addresses_str, 114 "addresses to listen on", "list of addresses" }, 115 { "disable-des", 0, arg_flag, &disable_des, 116 "disable DES" }, 117 { "builtin-hdb", 0, arg_flag, &builtin_hdb_flag, 118 "list builtin hdb backends"}, 119 { "help", 'h', arg_flag, &help_flag }, 120 { "version", 'v', arg_flag, &version_flag } 121 }; 122 123 static int num_args = sizeof(args) / sizeof(args[0]); 124 125 static void 126 usage(int ret) 127 { 128 arg_printusage (args, num_args, NULL, ""); 129 exit (ret); 130 } 131 132 static void 133 add_one_address (krb5_context context, const char *str, int first) 134 { 135 krb5_error_code ret; 136 krb5_addresses tmp; 137 138 ret = krb5_parse_address (context, str, &tmp); 139 if (ret) 140 krb5_err (context, 1, ret, "parse_address `%s'", str); 141 if (first) 142 krb5_copy_addresses(context, &tmp, &explicit_addresses); 143 else 144 krb5_append_addresses(context, &explicit_addresses, &tmp); 145 krb5_free_addresses (context, &tmp); 146 } 147 148 krb5_kdc_configuration * 149 configure(krb5_context context, int argc, char **argv) 150 { 151 krb5_kdc_configuration *config; 152 krb5_error_code ret; 153 int optidx = 0; 154 const char *p; 155 156 while(getarg(args, num_args, argc, argv, &optidx)) 157 warnx("error at argument `%s'", argv[optidx]); 158 159 if(help_flag) 160 usage (0); 161 162 if (version_flag) { 163 print_version(NULL); 164 exit(0); 165 } 166 167 if (builtin_hdb_flag) { 168 char *list; 169 ret = hdb_list_builtin(context, &list); 170 if (ret) 171 krb5_err(context, 1, ret, "listing builtin hdb backends"); 172 printf("builtin hdb backends: %s\n", list); 173 free(list); 174 exit(0); 175 } 176 177 argc -= optidx; 178 argv += optidx; 179 180 if (argc != 0) 181 usage(1); 182 183 { 184 char **files; 185 186 if (config_file == NULL) { 187 asprintf(&config_file, "%s/kdc.conf", hdb_db_dir(context)); 188 if (config_file == NULL) 189 errx(1, "out of memory"); 190 } 191 192 ret = krb5_prepend_config_files_default(config_file, &files); 193 if (ret) 194 krb5_err(context, 1, ret, "getting configuration files"); 195 196 ret = krb5_set_config_files(context, files); 197 krb5_free_config_files(files); 198 if(ret) 199 krb5_err(context, 1, ret, "reading configuration files"); 200 } 201 202 ret = krb5_kdc_get_config(context, &config); 203 if (ret) 204 krb5_err(context, 1, ret, "krb5_kdc_default_config"); 205 206 kdc_openlog(context, config); 207 208 ret = krb5_kdc_set_dbinfo(context, config); 209 if (ret) 210 krb5_err(context, 1, ret, "krb5_kdc_set_dbinfo"); 211 212 if(max_request_str) 213 max_request = parse_bytes(max_request_str, NULL); 214 215 if(max_request == 0){ 216 p = krb5_config_get_string (context, 217 NULL, 218 "kdc", 219 "max-request", 220 NULL); 221 if(p) 222 max_request = parse_bytes(p, NULL); 223 } 224 225 if(require_preauth != -1) 226 config->require_preauth = require_preauth; 227 228 if(port_str == NULL){ 229 p = krb5_config_get_string(context, NULL, "kdc", "ports", NULL); 230 if (p != NULL) 231 port_str = strdup(p); 232 } 233 234 explicit_addresses.len = 0; 235 236 if (addresses_str.num_strings) { 237 int i; 238 239 for (i = 0; i < addresses_str.num_strings; ++i) 240 add_one_address (context, addresses_str.strings[i], i == 0); 241 free_getarg_strings (&addresses_str); 242 } else { 243 char **foo = krb5_config_get_strings (context, NULL, 244 "kdc", "addresses", NULL); 245 246 if (foo != NULL) { 247 add_one_address (context, *foo++, TRUE); 248 while (*foo) 249 add_one_address (context, *foo++, FALSE); 250 } 251 } 252 253 if(enable_v4 != -1) 254 config->enable_v4 = enable_v4; 255 256 if(enable_v4_cross_realm != -1) 257 config->enable_v4_cross_realm = enable_v4_cross_realm; 258 259 if(enable_524 != -1) 260 config->enable_524 = enable_524; 261 262 if(enable_http == -1) 263 enable_http = krb5_config_get_bool(context, NULL, "kdc", 264 "enable-http", NULL); 265 266 if(request_log == NULL) 267 request_log = krb5_config_get_string(context, NULL, 268 "kdc", 269 "kdc-request-log", 270 NULL); 271 272 if (krb5_config_get_string(context, NULL, "kdc", 273 "enforce-transited-policy", NULL)) 274 krb5_errx(context, 1, "enforce-transited-policy deprecated, " 275 "use [kdc]transited-policy instead"); 276 277 if (enable_kaserver != -1) 278 config->enable_kaserver = enable_kaserver; 279 280 if(detach_from_console == -1) 281 detach_from_console = krb5_config_get_bool_default(context, NULL, 282 DETACH_IS_DEFAULT, 283 "kdc", 284 "detach", NULL); 285 286 if(max_request == 0) 287 max_request = 64 * 1024; 288 289 if (port_str == NULL) 290 port_str = "+"; 291 292 if (v4_realm) 293 config->v4_realm = v4_realm; 294 295 if(config->v4_realm == NULL && (config->enable_kaserver || config->enable_v4)) 296 krb5_errx(context, 1, "Kerberos 4 enabled but no realm configured"); 297 298 if(disable_des == -1) 299 disable_des = krb5_config_get_bool_default(context, NULL, 300 FALSE, 301 "kdc", 302 "disable-des", NULL); 303 if(disable_des) { 304 krb5_enctype_disable(context, ETYPE_DES_CBC_CRC); 305 krb5_enctype_disable(context, ETYPE_DES_CBC_MD4); 306 krb5_enctype_disable(context, ETYPE_DES_CBC_MD5); 307 krb5_enctype_disable(context, ETYPE_DES_CBC_NONE); 308 krb5_enctype_disable(context, ETYPE_DES_CFB64_NONE); 309 krb5_enctype_disable(context, ETYPE_DES_PCBC_NONE); 310 311 kdc_log(context, config, 312 0, "DES was disabled, turned off Kerberos V4, 524 " 313 "and kaserver"); 314 config->enable_v4 = 0; 315 config->enable_524 = 0; 316 config->enable_kaserver = 0; 317 } 318 319 krb5_kdc_windc_init(context); 320 321 return config; 322 } 323