crypto/external/bsd/heimdal/dist/kcm/config.c

   1 /*      $NetBSD: config.c,v 1.1.1.2 2014/04/24 12:45:27 pettai 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 #ifdef SUPPORT_DETACH
  50 int detach_from_console = -1;
  51 #define DETACH_IS_DEFAULT FALSE
  52 #endif
  53
  54 static const char *system_cache_name = NULL;
  55 static const char *system_keytab = NULL;
  56 static const char *system_principal = NULL;
  57 static const char *system_server = NULL;
  58 static const char *system_perms = NULL;
  59 static const char *system_user = NULL;
  60 static const char *system_group = NULL;
  61
  62 static const char *renew_life = NULL;
  63 static const char *ticket_life = NULL;
  64
  65 int launchd_flag = 0;
  66 int disallow_getting_krbtgt = 0;
  67 int name_constraints = -1;
  68
  69 static int help_flag;
  70 static int version_flag;
  71
  72 static struct getargs args[] = {
  73     {
  74         "cache-name",   0,      arg_string,     &system_cache_name,
  75         "system cache name", "cachename"
  76     },
  77     {
  78         "config-file",  'c',    arg_string,     &config_file,
  79         "location of config file",      "file"
  80     },
  81     {
  82         "group",        'g',    arg_string,     &system_group,
  83         "system cache group",   "group"
  84     },
  85     {
  86         "max-request",  0,      arg_string, &max_request,
  87         "max size for a kcm-request", "size"
  88     },
  89     {
  90         "launchd",      0,      arg_flag, &launchd_flag,
  91         "when in use by launchd"
  92     },
  93 #ifdef SUPPORT_DETACH
  94 #if DETACH_IS_DEFAULT
  95     {
  96         "detach",       'D',      arg_negative_flag, &detach_from_console,
  97         "don't detach from console"
  98     },
  99 #else
 100     {
 101         "detach",       0 ,      arg_flag, &detach_from_console,
 102         "detach from console"
 103     },
 104 #endif
 105 #endif
 106     {   "help",         'h',    arg_flag,   &help_flag },
 107     {
 108         "system-principal",     'k',    arg_string,     &system_principal,
 109         "system principal name",        "principal"
 110     },
 111     {
 112         "lifetime",     'l', arg_string, &ticket_life,
 113         "lifetime of system tickets", "time"
 114     },
 115     {
 116         "mode",         'm', arg_string, &system_perms,
 117         "octal mode of system cache", "mode"
 118     },
 119     {
 120         "name-constraints",     'n', arg_negative_flag, &name_constraints,
 121         "disable credentials cache name constraints"
 122     },
 123     {
 124         "disallow-getting-krbtgt", 0, arg_flag, &disallow_getting_krbtgt,
 125         "disable fetching krbtgt from the cache"
 126     },
 127     {
 128         "renewable-life",       'r', arg_string, &renew_life,
 129         "renewable lifetime of system tickets", "time"
 130     },
 131     {
 132         "socket-path",          's', arg_string, &socket_path,
 133         "path to kcm domain socket", "path"
 134     },
 135 #ifdef HAVE_DOOR_CREATE
 136     {
 137         "door-path",            's', arg_string, &door_path,
 138         "path to kcm door", "path"
 139     },
 140 #endif
 141     {
 142         "server",               'S', arg_string, &system_server,
 143         "server to get system ticket for", "principal"
 144     },
 145     {
 146         "keytab",       't',    arg_string,     &system_keytab,
 147         "system keytab name",   "keytab"
 148     },
 149     {
 150         "user",         'u',    arg_string,     &system_user,
 151         "system cache owner",   "user"
 152     },
 153     {   "version",      'v',    arg_flag,   &version_flag }
 154 };
 155
 156 static int num_args = sizeof(args) / sizeof(args[0]);
 157
 158 static void
 159 usage(int ret)
 160 {
 161     arg_printusage (args, num_args, NULL, "");
 162     exit (ret);
 163 }
 164
 165 static int parse_owners(kcm_ccache ccache)
 166 {
 167     uid_t uid = 0;
 168     gid_t gid = 0;
 169     struct passwd *pw;
 170     struct group *gr;
 171     int uid_p = 0;
 172     int gid_p = 0;
 173
 174     if (system_user != NULL) {
 175         if (isdigit((unsigned char)system_user[0])) {
 176             pw = getpwuid(atoi(system_user));
 177         } else {
 178             pw = getpwnam(system_user);
 179         }
 180         if (pw == NULL) {
 181             return errno;
 182         }
 183
 184         system_user = strdup(pw->pw_name);
 185         if (system_user == NULL) {
 186             return ENOMEM;
 187         }
 188
 189         uid = pw->pw_uid; uid_p = 1;
 190         gid = pw->pw_gid; gid_p = 1;
 191     }
 192
 193     if (system_group != NULL) {
 194         if (isdigit((unsigned char)system_group[0])) {
 195             gr = getgrgid(atoi(system_group));
 196         } else {
 197             gr = getgrnam(system_group);
 198         }
 199         if (gr == NULL) {
 200             return errno;
 201         }
 202
 203         gid = gr->gr_gid; gid_p = 1;
 204     }
 205
 206     if (uid_p)
 207         ccache->uid = uid;
 208     else
 209         ccache->uid = 0; /* geteuid() XXX */
 210
 211     if (gid_p)
 212         ccache->gid = gid;
 213     else
 214         ccache->gid = 0; /* getegid() XXX */
 215
 216     return 0;
 217 }
 218
 219 static const char *
 220 kcm_system_config_get_string(const char *string)
 221 {
 222     return krb5_config_get_string(kcm_context, NULL, "kcm",
 223                                   "system_ccache", string, NULL);
 224 }
 225
 226 static krb5_error_code
 227 ccache_init_system(void)
 228 {
 229     kcm_ccache ccache;
 230     krb5_error_code ret;
 231
 232     if (system_cache_name == NULL)
 233         system_cache_name = kcm_system_config_get_string("cc_name");
 234
 235     ret = kcm_ccache_new(kcm_context,
 236                          system_cache_name ? system_cache_name : "SYSTEM",
 237                          &ccache);
 238     if (ret)
 239         return ret;
 240
 241     ccache->flags |= KCM_FLAGS_OWNER_IS_SYSTEM;
 242     ccache->flags |= KCM_FLAGS_USE_KEYTAB;
 243
 244     ret = parse_owners(ccache);
 245     if (ret)
 246         return ret;
 247
 248     ret = krb5_parse_name(kcm_context, system_principal, &ccache->client);
 249     if (ret) {
 250         kcm_release_ccache(kcm_context, ccache);
 251         return ret;
 252     }
 253
 254     if (system_server == NULL)
 255         system_server = kcm_system_config_get_string("server");
 256
 257     if (system_server != NULL) {
 258         ret = krb5_parse_name(kcm_context, system_server, &ccache->server);
 259         if (ret) {
 260             kcm_release_ccache(kcm_context, ccache);
 261             return ret;
 262         }
 263     }
 264
 265     if (system_keytab == NULL)
 266         system_keytab = kcm_system_config_get_string("keytab_name");
 267
 268     if (system_keytab != NULL) {
 269         ret = krb5_kt_resolve(kcm_context, system_keytab, &ccache->key.keytab);
 270     } else {
 271         ret = krb5_kt_default(kcm_context, &ccache->key.keytab);
 272     }
 273     if (ret) {
 274         kcm_release_ccache(kcm_context, ccache);
 275         return ret;
 276     }
 277
 278     if (renew_life == NULL)
 279         renew_life = kcm_system_config_get_string("renew_life");
 280
 281     if (renew_life == NULL)
 282         renew_life = "1 month";
 283
 284     if (renew_life != NULL) {
 285         ccache->renew_life = parse_time(renew_life, "s");
 286         if (ccache->renew_life < 0) {
 287             kcm_release_ccache(kcm_context, ccache);
 288             return EINVAL;
 289         }
 290     }
 291
 292     if (ticket_life == NULL)
 293         ticket_life = kcm_system_config_get_string("ticket_life");
 294
 295     if (ticket_life != NULL) {
 296         ccache->tkt_life = parse_time(ticket_life, "s");
 297         if (ccache->tkt_life < 0) {
 298             kcm_release_ccache(kcm_context, ccache);
 299             return EINVAL;
 300         }
 301     }
 302
 303     if (system_perms == NULL)
 304         system_perms = kcm_system_config_get_string("mode");
 305
 306     if (system_perms != NULL) {
 307         int mode;
 308
 309         if (sscanf(system_perms, "%o", &mode) != 1)
 310             return EINVAL;
 311
 312         ccache->mode = mode;
 313     }
 314
 315     if (disallow_getting_krbtgt == -1) {
 316         disallow_getting_krbtgt =
 317             krb5_config_get_bool_default(kcm_context, NULL, FALSE, "kcm",
 318                                          "disallow-getting-krbtgt", NULL);
 319     }
 320
 321     /* enqueue default actions for credentials cache */
 322     ret = kcm_ccache_enqueue_default(kcm_context, ccache, NULL);
 323
 324     kcm_release_ccache(kcm_context, ccache); /* retained by event queue */
 325
 326     return ret;
 327 }
 328
 329 void
 330 kcm_configure(int argc, char **argv)
 331 {
 332     krb5_error_code ret;
 333     int optind = 0;
 334     const char *p;
 335
 336     while(getarg(args, num_args, argc, argv, &optind))
 337         warnx("error at argument `%s'", argv[optind]);
 338
 339     if(help_flag)
 340         usage (0);
 341
 342     if (version_flag) {
 343         print_version(NULL);
 344         exit(0);
 345     }
 346
 347     argc -= optind;
 348     argv += optind;
 349
 350     if (argc != 0)
 351         usage(1);
 352
 353     {
 354         char **files;
 355
 356         if(config_file == NULL)
 357             config_file = _PATH_KCM_CONF;
 358
 359         ret = krb5_prepend_config_files_default(config_file, &files);
 360         if (ret)
 361             krb5_err(kcm_context, 1, ret, "getting configuration files");
 362
 363         ret = krb5_set_config_files(kcm_context, files);
 364         krb5_free_config_files(files);
 365         if(ret)
 366             krb5_err(kcm_context, 1, ret, "reading configuration files");
 367     }
 368
 369     if(max_request_str)
 370         max_request = parse_bytes(max_request_str, NULL);
 371
 372     if(max_request == 0){
 373         p = krb5_config_get_string (kcm_context,
 374                                     NULL,
 375                                     "kcm",
 376                                     "max-request",
 377                                     NULL);
 378         if(p)
 379             max_request = parse_bytes(p, NULL);
 380     }
 381
 382     if (system_principal == NULL) {
 383         system_principal = kcm_system_config_get_string("principal");
 384     }
 385
 386     if (system_principal != NULL) {
 387         ret = ccache_init_system();
 388         if (ret)
 389             krb5_err(kcm_context, 1, ret, "initializing system ccache");
 390     }
 391
 392 #ifdef SUPPORT_DETACH
 393     if(detach_from_console == -1)
 394         detach_from_console = krb5_config_get_bool_default(kcm_context, NULL,
 395                                                            DETACH_IS_DEFAULT,
 396                                                            "kcm",
 397                                                            "detach", NULL);
 398 #endif
 399     kcm_openlog();
 400     if(max_request == 0)
 401         max_request = 64 * 1024;
 402 }
 403