1 /* 2 * Copyright (c) 2005, PADL Software Pty Ltd. 3 * All rights reserved. 4 * 5 * Portions Copyright (c) 2009 Apple Inc. 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 PADL Software 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 PADL SOFTWARE 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 PADL SOFTWARE 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 "kcm_locl.h" 36 #include <getarg.h> 37 #include <parse_bytes.h> 38 39 static const char *config_file; /* location of kcm config file */ 40 41 size_t max_request = 0; /* maximal size of a request */ 42 char *socket_path = NULL; 43 char *door_path = NULL; 44 45 static char *max_request_str; /* `max_request' as a string */ 46 47 #ifdef SUPPORT_DETACH 48 int detach_from_console = -1; 49 #define DETACH_IS_DEFAULT FALSE 50 #endif 51 52 static const char *system_cache_name = NULL; 53 static const char *system_keytab = NULL; 54 static const char *system_principal = NULL; 55 static const char *system_server = NULL; 56 static const char *system_perms = NULL; 57 static const char *system_user = NULL; 58 static const char *system_group = NULL; 59 60 static const char *renew_life = NULL; 61 static const char *ticket_life = NULL; 62 63 int launchd_flag = 0; 64 int disallow_getting_krbtgt = 0; 65 int name_constraints = -1; 66 67 static int help_flag; 68 static int version_flag; 69 70 static struct getargs args[] = { 71 { 72 "cache-name", 0, arg_string, &system_cache_name, 73 "system cache name", "cachename" 74 }, 75 { 76 "config-file", 'c', arg_string, &config_file, 77 "location of config file", "file" 78 }, 79 { 80 "group", 'g', arg_string, &system_group, 81 "system cache group", "group" 82 }, 83 { 84 "max-request", 0, arg_string, &max_request, 85 "max size for a kcm-request", "size" 86 }, 87 { 88 "launchd", 0, arg_flag, &launchd_flag, 89 "when in use by launchd" 90 }, 91 #ifdef SUPPORT_DETACH 92 #if DETACH_IS_DEFAULT 93 { 94 "detach", 'D', arg_negative_flag, &detach_from_console, 95 "don't detach from console" 96 }, 97 #else 98 { 99 "detach", 0 , arg_flag, &detach_from_console, 100 "detach from console" 101 }, 102 #endif 103 #endif 104 { "help", 'h', arg_flag, &help_flag }, 105 { 106 "system-principal", 'k', arg_string, &system_principal, 107 "system principal name", "principal" 108 }, 109 { 110 "lifetime", 'l', arg_string, &ticket_life, 111 "lifetime of system tickets", "time" 112 }, 113 { 114 "mode", 'm', arg_string, &system_perms, 115 "octal mode of system cache", "mode" 116 }, 117 { 118 "name-constraints", 'n', arg_negative_flag, &name_constraints, 119 "disable credentials cache name constraints" 120 }, 121 { 122 "disallow-getting-krbtgt", 0, arg_flag, &disallow_getting_krbtgt, 123 "disable fetching krbtgt from the cache" 124 }, 125 { 126 "renewable-life", 'r', arg_string, &renew_life, 127 "renewable lifetime of system tickets", "time" 128 }, 129 { 130 "socket-path", 's', arg_string, &socket_path, 131 "path to kcm domain socket", "path" 132 }, 133 #ifdef HAVE_DOOR_CREATE 134 { 135 "door-path", 's', arg_string, &door_path, 136 "path to kcm door", "path" 137 }, 138 #endif 139 { 140 "server", 'S', arg_string, &system_server, 141 "server to get system ticket for", "principal" 142 }, 143 { 144 "keytab", 't', arg_string, &system_keytab, 145 "system keytab name", "keytab" 146 }, 147 { 148 "user", 'u', arg_string, &system_user, 149 "system cache owner", "user" 150 }, 151 { "version", 'v', arg_flag, &version_flag } 152 }; 153 154 static int num_args = sizeof(args) / sizeof(args[0]); 155 156 static void 157 usage(int ret) 158 { 159 arg_printusage (args, num_args, NULL, ""); 160 exit (ret); 161 } 162 163 static int parse_owners(kcm_ccache ccache) 164 { 165 uid_t uid = 0; 166 gid_t gid = 0; 167 struct passwd *pw; 168 struct group *gr; 169 int uid_p = 0; 170 int gid_p = 0; 171 172 if (system_user != NULL) { 173 if (isdigit((unsigned char)system_user[0])) { 174 pw = getpwuid(atoi(system_user)); 175 } else { 176 pw = getpwnam(system_user); 177 } 178 if (pw == NULL) { 179 return errno; 180 } 181 182 system_user = strdup(pw->pw_name); 183 if (system_user == NULL) { 184 return ENOMEM; 185 } 186 187 uid = pw->pw_uid; uid_p = 1; 188 gid = pw->pw_gid; gid_p = 1; 189 } 190 191 if (system_group != NULL) { 192 if (isdigit((unsigned char)system_group[0])) { 193 gr = getgrgid(atoi(system_group)); 194 } else { 195 gr = getgrnam(system_group); 196 } 197 if (gr == NULL) { 198 return errno; 199 } 200 201 gid = gr->gr_gid; gid_p = 1; 202 } 203 204 if (uid_p) 205 ccache->uid = uid; 206 else 207 ccache->uid = 0; /* geteuid() XXX */ 208 209 if (gid_p) 210 ccache->gid = gid; 211 else 212 ccache->gid = 0; /* getegid() XXX */ 213 214 return 0; 215 } 216 217 static const char * 218 kcm_system_config_get_string(const char *string) 219 { 220 return krb5_config_get_string(kcm_context, NULL, "kcm", 221 "system_ccache", string, NULL); 222 } 223 224 static krb5_error_code 225 ccache_init_system(void) 226 { 227 kcm_ccache ccache; 228 krb5_error_code ret; 229 230 if (system_cache_name == NULL) 231 system_cache_name = kcm_system_config_get_string("cc_name"); 232 233 ret = kcm_ccache_new(kcm_context, 234 system_cache_name ? system_cache_name : "SYSTEM", 235 &ccache); 236 if (ret) 237 return ret; 238 239 ccache->flags |= KCM_FLAGS_OWNER_IS_SYSTEM; 240 ccache->flags |= KCM_FLAGS_USE_KEYTAB; 241 242 ret = parse_owners(ccache); 243 if (ret) 244 return ret; 245 246 ret = krb5_parse_name(kcm_context, system_principal, &ccache->client); 247 if (ret) { 248 kcm_release_ccache(kcm_context, ccache); 249 return ret; 250 } 251 252 if (system_server == NULL) 253 system_server = kcm_system_config_get_string("server"); 254 255 if (system_server != NULL) { 256 ret = krb5_parse_name(kcm_context, system_server, &ccache->server); 257 if (ret) { 258 kcm_release_ccache(kcm_context, ccache); 259 return ret; 260 } 261 } 262 263 if (system_keytab == NULL) 264 system_keytab = kcm_system_config_get_string("keytab_name"); 265 266 if (system_keytab != NULL) { 267 ret = krb5_kt_resolve(kcm_context, system_keytab, &ccache->key.keytab); 268 } else { 269 ret = krb5_kt_default(kcm_context, &ccache->key.keytab); 270 } 271 if (ret) { 272 kcm_release_ccache(kcm_context, ccache); 273 return ret; 274 } 275 276 if (renew_life == NULL) 277 renew_life = kcm_system_config_get_string("renew_life"); 278 279 if (renew_life == NULL) 280 renew_life = "1 month"; 281 282 if (renew_life != NULL) { 283 ccache->renew_life = parse_time(renew_life, "s"); 284 if (ccache->renew_life < 0) { 285 kcm_release_ccache(kcm_context, ccache); 286 return EINVAL; 287 } 288 } 289 290 if (ticket_life == NULL) 291 ticket_life = kcm_system_config_get_string("ticket_life"); 292 293 if (ticket_life != NULL) { 294 ccache->tkt_life = parse_time(ticket_life, "s"); 295 if (ccache->tkt_life < 0) { 296 kcm_release_ccache(kcm_context, ccache); 297 return EINVAL; 298 } 299 } 300 301 if (system_perms == NULL) 302 system_perms = kcm_system_config_get_string("mode"); 303 304 if (system_perms != NULL) { 305 int mode; 306 307 if (sscanf(system_perms, "%o", &mode) != 1) 308 return EINVAL; 309 310 ccache->mode = mode; 311 } 312 313 if (disallow_getting_krbtgt == -1) { 314 disallow_getting_krbtgt = 315 krb5_config_get_bool_default(kcm_context, NULL, FALSE, "kcm", 316 "disallow-getting-krbtgt", NULL); 317 } 318 319 /* enqueue default actions for credentials cache */ 320 ret = kcm_ccache_enqueue_default(kcm_context, ccache, NULL); 321 322 kcm_release_ccache(kcm_context, ccache); /* retained by event queue */ 323 324 return ret; 325 } 326 327 void 328 kcm_configure(int argc, char **argv) 329 { 330 krb5_error_code ret; 331 int optind = 0; 332 const char *p; 333 334 while(getarg(args, num_args, argc, argv, &optind)) 335 warnx("error at argument `%s'", argv[optind]); 336 337 if(help_flag) 338 usage (0); 339 340 if (version_flag) { 341 print_version(NULL); 342 exit(0); 343 } 344 345 argc -= optind; 346 argv += optind; 347 348 if (argc != 0) 349 usage(1); 350 351 { 352 char **files; 353 354 if(config_file == NULL) 355 config_file = _PATH_KCM_CONF; 356 357 ret = krb5_prepend_config_files_default(config_file, &files); 358 if (ret) 359 krb5_err(kcm_context, 1, ret, "getting configuration files"); 360 361 ret = krb5_set_config_files(kcm_context, files); 362 krb5_free_config_files(files); 363 if(ret) 364 krb5_err(kcm_context, 1, ret, "reading configuration files"); 365 } 366 367 if(max_request_str) 368 max_request = parse_bytes(max_request_str, NULL); 369 370 if(max_request == 0){ 371 p = krb5_config_get_string (kcm_context, 372 NULL, 373 "kcm", 374 "max-request", 375 NULL); 376 if(p) 377 max_request = parse_bytes(p, NULL); 378 } 379 380 if (system_principal == NULL) { 381 system_principal = kcm_system_config_get_string("principal"); 382 } 383 384 if (system_principal != NULL) { 385 ret = ccache_init_system(); 386 if (ret) 387 krb5_err(kcm_context, 1, ret, "initializing system ccache"); 388 } 389 390 #ifdef SUPPORT_DETACH 391 if(detach_from_console == -1) 392 detach_from_console = krb5_config_get_bool_default(kcm_context, NULL, 393 DETACH_IS_DEFAULT, 394 "kcm", 395 "detach", NULL); 396 #endif 397 kcm_openlog(); 398 if(max_request == 0) 399 max_request = 64 * 1024; 400 } 401 402