1 /* $NetBSD: config.c,v 1.2 2017/01/28 21:31:44 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2005, PADL Software Pty Ltd. 5 * All rights reserved. 6 * 7 * Portions Copyright (c) 2009 Apple Inc. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * 3. Neither the name of PADL Software nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include "kcm_locl.h" 38 #include <krb5/getarg.h> 39 #include <krb5/parse_bytes.h> 40 41 static const char *config_file; /* location of kcm config file */ 42 43 size_t max_request = 0; /* maximal size of a request */ 44 char *socket_path = NULL; 45 char *door_path = NULL; 46 47 static char *max_request_str; /* `max_request' as a string */ 48 49 int detach_from_console = -1; 50 int daemon_child = -1; 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", NULL 90 }, 91 { 92 "detach", 0 , arg_flag, &detach_from_console, 93 "detach from console", NULL 94 }, 95 { 96 "daemon-child", 0 , arg_integer, &daemon_child, 97 "private argument, do not use", NULL 98 }, 99 { "help", 'h', arg_flag, &help_flag, NULL, NULL }, 100 { 101 "system-principal", 'k', arg_string, &system_principal, 102 "system principal name", "principal" 103 }, 104 { 105 "lifetime", 'l', arg_string, &ticket_life, 106 "lifetime of system tickets", "time" 107 }, 108 { 109 "mode", 'm', arg_string, &system_perms, 110 "octal mode of system cache", "mode" 111 }, 112 { 113 "name-constraints", 'n', arg_negative_flag, &name_constraints, 114 "disable credentials cache name constraints", NULL 115 }, 116 { 117 "disallow-getting-krbtgt", 0, arg_flag, &disallow_getting_krbtgt, 118 "disable fetching krbtgt from the cache", NULL 119 }, 120 { 121 "renewable-life", 'r', arg_string, &renew_life, 122 "renewable lifetime of system tickets", "time" 123 }, 124 { 125 "socket-path", 's', arg_string, &socket_path, 126 "path to kcm domain socket", "path" 127 }, 128 #ifdef HAVE_DOOR_CREATE 129 { 130 "door-path", 's', arg_string, &door_path, 131 "path to kcm door", "path" 132 }, 133 #endif 134 { 135 "server", 'S', arg_string, &system_server, 136 "server to get system ticket for", "principal" 137 }, 138 { 139 "keytab", 't', arg_string, &system_keytab, 140 "system keytab name", "keytab" 141 }, 142 { 143 "user", 'u', arg_string, &system_user, 144 "system cache owner", "user" 145 }, 146 { "version", 'v', arg_flag, &version_flag, NULL, NULL } 147 }; 148 149 static int num_args = sizeof(args) / sizeof(args[0]); 150 151 static void 152 usage(int ret) 153 { 154 arg_printusage (args, num_args, NULL, ""); 155 exit (ret); 156 } 157 158 static int parse_owners(kcm_ccache ccache) 159 { 160 uid_t uid = 0; 161 gid_t gid = 0; 162 struct passwd *pw; 163 struct group *gr; 164 int uid_p = 0; 165 int gid_p = 0; 166 167 if (system_user != NULL) { 168 if (isdigit((unsigned char)system_user[0])) { 169 pw = getpwuid(atoi(system_user)); 170 } else { 171 pw = getpwnam(system_user); 172 } 173 if (pw == NULL) { 174 return errno; 175 } 176 177 system_user = strdup(pw->pw_name); 178 if (system_user == NULL) { 179 return ENOMEM; 180 } 181 182 uid = pw->pw_uid; uid_p = 1; 183 gid = pw->pw_gid; gid_p = 1; 184 } 185 186 if (system_group != NULL) { 187 if (isdigit((unsigned char)system_group[0])) { 188 gr = getgrgid(atoi(system_group)); 189 } else { 190 gr = getgrnam(system_group); 191 } 192 if (gr == NULL) { 193 return errno; 194 } 195 196 gid = gr->gr_gid; gid_p = 1; 197 } 198 199 if (uid_p) 200 ccache->uid = uid; 201 else 202 ccache->uid = 0; /* geteuid() XXX */ 203 204 if (gid_p) 205 ccache->gid = gid; 206 else 207 ccache->gid = 0; /* getegid() XXX */ 208 209 return 0; 210 } 211 212 static const char * 213 kcm_system_config_get_string(const char *string) 214 { 215 return krb5_config_get_string(kcm_context, NULL, "kcm", 216 "system_ccache", string, NULL); 217 } 218 219 static krb5_error_code 220 ccache_init_system(void) 221 { 222 kcm_ccache ccache; 223 krb5_error_code ret; 224 225 if (system_cache_name == NULL) 226 system_cache_name = kcm_system_config_get_string("cc_name"); 227 228 ret = kcm_ccache_new(kcm_context, 229 system_cache_name ? system_cache_name : "SYSTEM", 230 &ccache); 231 if (ret) 232 return ret; 233 234 ccache->flags |= KCM_FLAGS_OWNER_IS_SYSTEM; 235 ccache->flags |= KCM_FLAGS_USE_KEYTAB; 236 237 ret = parse_owners(ccache); 238 if (ret) 239 return ret; 240 241 ret = krb5_parse_name(kcm_context, system_principal, &ccache->client); 242 if (ret) { 243 kcm_release_ccache(kcm_context, ccache); 244 return ret; 245 } 246 247 if (system_server == NULL) 248 system_server = kcm_system_config_get_string("server"); 249 250 if (system_server != NULL) { 251 ret = krb5_parse_name(kcm_context, system_server, &ccache->server); 252 if (ret) { 253 kcm_release_ccache(kcm_context, ccache); 254 return ret; 255 } 256 } 257 258 if (system_keytab == NULL) 259 system_keytab = kcm_system_config_get_string("keytab_name"); 260 261 if (system_keytab != NULL) { 262 ret = krb5_kt_resolve(kcm_context, system_keytab, &ccache->key.keytab); 263 } else { 264 ret = krb5_kt_default(kcm_context, &ccache->key.keytab); 265 } 266 if (ret) { 267 kcm_release_ccache(kcm_context, ccache); 268 return ret; 269 } 270 271 if (renew_life == NULL) 272 renew_life = kcm_system_config_get_string("renew_life"); 273 274 if (renew_life == NULL) 275 renew_life = "6 months"; 276 277 if (renew_life != NULL) { 278 ccache->renew_life = parse_time(renew_life, "s"); 279 if (ccache->renew_life < 0) { 280 kcm_release_ccache(kcm_context, ccache); 281 return EINVAL; 282 } 283 } 284 285 if (ticket_life == NULL) 286 ticket_life = kcm_system_config_get_string("ticket_life"); 287 288 if (ticket_life != NULL) { 289 ccache->tkt_life = parse_time(ticket_life, "s"); 290 if (ccache->tkt_life < 0) { 291 kcm_release_ccache(kcm_context, ccache); 292 return EINVAL; 293 } 294 } 295 296 if (system_perms == NULL) 297 system_perms = kcm_system_config_get_string("mode"); 298 299 if (system_perms != NULL) { 300 int mode; 301 302 if (sscanf(system_perms, "%o", &mode) != 1) 303 return EINVAL; 304 305 ccache->mode = mode; 306 } 307 308 if (disallow_getting_krbtgt == -1) { 309 disallow_getting_krbtgt = 310 krb5_config_get_bool_default(kcm_context, NULL, FALSE, "kcm", 311 "disallow-getting-krbtgt", NULL); 312 } 313 314 /* enqueue default actions for credentials cache */ 315 ret = kcm_ccache_enqueue_default(kcm_context, ccache, NULL); 316 317 kcm_release_ccache(kcm_context, ccache); /* retained by event queue */ 318 319 return ret; 320 } 321 322 void 323 kcm_configure(int argc, char **argv) 324 { 325 krb5_error_code ret; 326 int optidx = 0; 327 const char *p; 328 329 while (getarg(args, num_args, argc, argv, &optidx)) 330 warnx("error at argument `%s'", argv[optidx]); 331 332 if (help_flag) 333 usage (0); 334 335 if (version_flag) { 336 print_version(NULL); 337 exit(0); 338 } 339 340 argc -= optidx; 341 argv += optidx; 342 343 if (argc != 0) 344 usage(1); 345 346 { 347 char **files; 348 349 if(config_file == NULL) 350 config_file = _PATH_KCM_CONF; 351 352 ret = krb5_prepend_config_files_default(config_file, &files); 353 if (ret) 354 krb5_err(kcm_context, 1, ret, "getting configuration files"); 355 356 ret = krb5_set_config_files(kcm_context, files); 357 krb5_free_config_files(files); 358 if(ret) 359 krb5_err(kcm_context, 1, ret, "reading configuration files"); 360 } 361 362 if(max_request_str) 363 max_request = parse_bytes(max_request_str, NULL); 364 365 if(max_request == 0){ 366 p = krb5_config_get_string (kcm_context, 367 NULL, 368 "kcm", 369 "max-request", 370 NULL); 371 if(p) 372 max_request = parse_bytes(p, NULL); 373 } 374 375 if (system_principal == NULL) { 376 system_principal = kcm_system_config_get_string("principal"); 377 } 378 379 if (system_principal != NULL) { 380 ret = ccache_init_system(); 381 if (ret) 382 krb5_err(kcm_context, 1, ret, "initializing system ccache"); 383 } 384 385 if(detach_from_console == -1) 386 detach_from_console = krb5_config_get_bool_default(kcm_context, NULL, 387 FALSE, 388 "kcm", 389 "detach", NULL); 390 kcm_openlog(); 391 if(max_request == 0) 392 max_request = 64 * 1024; 393 } 394 395