kdc/default_config.c

   1 /*
   2  * Copyright (c) 1997-2007 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "kdc_locl.h"
  37 #include <getarg.h>
  38 #include <parse_bytes.h>
  39
  40 static const char *sysplugin_dirs[] =  {
  41 #ifdef _WIN32
  42     "$ORIGIN",
  43 #else
  44     "$ORIGIN/../lib/plugin/kdc",
  45 #endif
  46 #ifdef __APPLE__
  47     LIBDIR "/plugin/kdc",
  48 #endif
  49     NULL
  50 };
  51
  52 static void
  53 load_kdc_plugins_once(void *ctx)
  54 {
  55     krb5_context context = ctx;
  56     const char * const *dirs = sysplugin_dirs;
  57 #ifndef _WIN32
  58     char **cfdirs;
  59
  60     cfdirs = krb5_config_get_strings(context, NULL, "kdc", "plugin_dir", NULL);
  61     if (cfdirs)
  62         dirs = (const char * const *)cfdirs;
  63 #endif
  64
  65     _krb5_load_plugins(context, "kdc", (const char **)dirs);
  66
  67 #ifndef _WIN32
  68     krb5_config_free_strings(cfdirs);
  69 #endif
  70 }
  71
  72 krb5_error_code
  73 krb5_kdc_get_config(krb5_context context, krb5_kdc_configuration **config)
  74 {
  75     static heim_base_once_t load_kdc_plugins = HEIM_BASE_ONCE_INIT;
  76     krb5_kdc_configuration *c;
  77     krb5_error_code ret;
  78
  79     heim_base_once_f(&load_kdc_plugins, context, load_kdc_plugins_once);
  80
  81     c = calloc(1, sizeof(*c));
  82     if (c == NULL) {
  83         krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
  84         return ENOMEM;
  85     }
  86
  87     c->app = "kdc";
  88     c->num_kdc_processes = -1;
  89     c->require_preauth = TRUE;
  90     c->kdc_warn_pwexpire = 0;
  91     c->encode_as_rep_as_tgs_rep = FALSE;
  92     c->tgt_use_strongest_session_key = FALSE;
  93     c->preauth_use_strongest_session_key = FALSE;
  94     c->svc_use_strongest_session_key = FALSE;
  95     c->use_strongest_server_key = TRUE;
  96     c->check_ticket_addresses = TRUE;
  97     c->warn_ticket_addresses = FALSE;
  98     c->allow_null_ticket_addresses = TRUE;
  99     c->allow_anonymous = FALSE;
 100     c->historical_anon_realm = FALSE;
 101     c->strict_nametypes = FALSE;
 102     c->trpolicy = TRPOLICY_ALWAYS_CHECK;
 103     c->enable_pkinit = FALSE;
 104     c->pkinit_princ_in_cert = TRUE;
 105     c->pkinit_require_binding = TRUE;
 106     c->synthetic_clients = FALSE;
 107     c->pkinit_max_life_from_cert_extension = FALSE;
 108     c->pkinit_max_life_bound = 0;
 109     c->synthetic_clients_max_life = 300;
 110     c->synthetic_clients_max_renew = 300;
 111     c->pkinit_dh_min_bits = 1024;
 112     c->db = NULL;
 113     c->num_db = 0;
 114     c->logf = NULL;
 115
 116     c->num_kdc_processes =
 117         krb5_config_get_int_default(context, NULL, c->num_kdc_processes,
 118                                     "kdc", "num-kdc-processes", NULL);
 119
 120     c->require_preauth =
 121         krb5_config_get_bool_default(context, NULL,
 122                                      c->require_preauth,
 123                                      "kdc", "require-preauth", NULL);
 124 #ifdef DIGEST
 125     c->enable_digest =
 126         krb5_config_get_bool_default(context, NULL,
 127                                      FALSE,
 128                                      "kdc", "enable-digest", NULL);
 129
 130     {
 131         const char *digests;
 132
 133         digests = krb5_config_get_string(context, NULL,
 134                                          "kdc",
 135                                          "digests_allowed", NULL);
 136         if (digests == NULL)
 137             digests = "ntlm-v2";
 138         c->digests_allowed = parse_flags(digests,_kdc_digestunits, 0);
 139         if (c->digests_allowed == -1) {
 140             kdc_log(context, c, 0,
 141                     "unparsable digest units (%s), turning off digest",
 142                     digests);
 143             c->enable_digest = 0;
 144         } else if (c->digests_allowed == 0) {
 145             kdc_log(context, c, 0, "no digest enable, turning digest off");
 146             c->enable_digest = 0;
 147         }
 148     }
 149 #endif
 150
 151 #ifdef KX509
 152     c->enable_kx509 =
 153         krb5_config_get_bool_default(context, NULL,
 154                                      FALSE,
 155                                      "kdc", "enable_kx509", NULL);
 156 #endif
 157
 158     c->tgt_use_strongest_session_key =
 159         krb5_config_get_bool_default(context, NULL,
 160                                      c->tgt_use_strongest_session_key,
 161                                      "kdc",
 162                                      "tgt-use-strongest-session-key", NULL);
 163     c->preauth_use_strongest_session_key =
 164         krb5_config_get_bool_default(context, NULL,
 165                                      c->preauth_use_strongest_session_key,
 166                                      "kdc",
 167                                      "preauth-use-strongest-session-key", NULL);
 168     c->svc_use_strongest_session_key =
 169         krb5_config_get_bool_default(context, NULL,
 170                                      c->svc_use_strongest_session_key,
 171                                      "kdc",
 172                                      "svc-use-strongest-session-key", NULL);
 173     c->use_strongest_server_key =
 174         krb5_config_get_bool_default(context, NULL,
 175                                      c->use_strongest_server_key,
 176                                      "kdc",
 177                                      "use-strongest-server-key", NULL);
 178
 179     c->check_ticket_addresses =
 180         krb5_config_get_bool_default(context, NULL,
 181                                      c->check_ticket_addresses,
 182                                      "kdc",
 183                                      "check-ticket-addresses", NULL);
 184     c->warn_ticket_addresses =
 185         krb5_config_get_bool_default(context, NULL,
 186                                      c->warn_ticket_addresses,
 187                                      "kdc",
 188                                      "warn_ticket_addresses", NULL);
 189     c->allow_null_ticket_addresses =
 190         krb5_config_get_bool_default(context, NULL,
 191                                      c->allow_null_ticket_addresses,
 192                                      "kdc",
 193                                      "allow-null-ticket-addresses", NULL);
 194
 195     c->allow_anonymous =
 196         krb5_config_get_bool_default(context, NULL,
 197                                      c->allow_anonymous,
 198                                      "kdc",
 199                                      "allow-anonymous", NULL);
 200
 201     c->historical_anon_realm =
 202         krb5_config_get_bool_default(context, NULL,
 203                                      c->historical_anon_realm,
 204                                      "kdc",
 205                                      "historical_anon_realm", NULL);
 206
 207     c->strict_nametypes =
 208         krb5_config_get_bool_default(context, NULL,
 209                                      c->strict_nametypes,
 210                                      "kdc",
 211                                      "strict-nametypes", NULL);
 212
 213     c->max_datagram_reply_length =
 214         krb5_config_get_int_default(context,
 215                                     NULL,
 216                                     1400,
 217                                     "kdc",
 218                                     "max-kdc-datagram-reply-length",
 219                                     NULL);
 220
 221     {
 222         const char *trpolicy_str;
 223
 224         trpolicy_str =
 225             krb5_config_get_string_default(context, NULL, "DEFAULT", "kdc",
 226                                            "transited-policy", NULL);
 227         if(strcasecmp(trpolicy_str, "always-check") == 0) {
 228             c->trpolicy = TRPOLICY_ALWAYS_CHECK;
 229         } else if(strcasecmp(trpolicy_str, "allow-per-principal") == 0) {
 230             c->trpolicy = TRPOLICY_ALLOW_PER_PRINCIPAL;
 231         } else if(strcasecmp(trpolicy_str, "always-honour-request") == 0) {
 232             c->trpolicy = TRPOLICY_ALWAYS_HONOUR_REQUEST;
 233         } else if(strcasecmp(trpolicy_str, "DEFAULT") == 0) {
 234             /* default */
 235         } else {
 236             kdc_log(context, c, 0,
 237                     "unknown transited-policy: %s, "
 238                     "reverting to default (always-check)",
 239                     trpolicy_str);
 240         }
 241     }
 242
 243     c->encode_as_rep_as_tgs_rep =
 244         krb5_config_get_bool_default(context, NULL,
 245                                      c->encode_as_rep_as_tgs_rep,
 246                                      "kdc",
 247                                      "encode_as_rep_as_tgs_rep", NULL);
 248
 249     c->kdc_warn_pwexpire =
 250         krb5_config_get_time_default (context, NULL,
 251                                       c->kdc_warn_pwexpire,
 252                                       "kdc", "kdc_warn_pwexpire", NULL);
 253
 254
 255     c->enable_pkinit =
 256         krb5_config_get_bool_default(context,
 257                                      NULL,
 258                                      c->enable_pkinit,
 259                                      "kdc",
 260                                      "enable-pkinit",
 261                                      NULL);
 262
 263
 264     c->pkinit_kdc_identity =
 265         krb5_config_get_string(context, NULL,
 266                                "kdc", "pkinit_identity", NULL);
 267     c->pkinit_kdc_anchors =
 268         krb5_config_get_string(context, NULL,
 269                                "kdc", "pkinit_anchors", NULL);
 270     c->pkinit_kdc_cert_pool =
 271         krb5_config_get_strings(context, NULL,
 272                                 "kdc", "pkinit_pool", NULL);
 273     c->pkinit_kdc_revoke =
 274         krb5_config_get_strings(context, NULL,
 275                                 "kdc", "pkinit_revoke", NULL);
 276     c->pkinit_kdc_ocsp_file =
 277         krb5_config_get_string(context, NULL,
 278                                "kdc", "pkinit_kdc_ocsp", NULL);
 279     c->pkinit_kdc_friendly_name =
 280         krb5_config_get_string(context, NULL,
 281                                "kdc", "pkinit_kdc_friendly_name", NULL);
 282     c->pkinit_princ_in_cert =
 283         krb5_config_get_bool_default(context, NULL,
 284                                      c->pkinit_princ_in_cert,
 285                                      "kdc",
 286                                      "pkinit_principal_in_certificate",
 287                                      NULL);
 288     c->pkinit_require_binding =
 289         krb5_config_get_bool_default(context, NULL,
 290                                      c->pkinit_require_binding,
 291                                      "kdc",
 292                                      "pkinit_win2k_require_binding",
 293                                      NULL);
 294     c->pkinit_dh_min_bits =
 295         krb5_config_get_int_default(context, NULL,
 296                                     0,
 297                                     "kdc", "pkinit_dh_min_bits", NULL);
 298
 299     c->pkinit_max_life_from_cert_extension =
 300         krb5_config_get_bool_default(context, NULL,
 301                                      c->pkinit_max_life_from_cert_extension,
 302                                      "kdc",
 303                                      "pkinit_max_life_from_cert_extension",
 304                                      NULL);
 305
 306     c->synthetic_clients =
 307         krb5_config_get_bool_default(context, NULL,
 308                                      c->synthetic_clients,
 309                                      "kdc",
 310                                      "synthetic_clients",
 311                                      NULL);
 312
 313     c->pkinit_max_life_bound =
 314          krb5_config_get_time_default(context, NULL, 0, "kdc",
 315                                       "pkinit_max_life_bound",
 316                                       NULL);
 317
 318     c->pkinit_max_life_from_cert =
 319          krb5_config_get_time_default(context, NULL, 0, "kdc",
 320                                       "pkinit_max_life_from_cert",
 321                                       NULL);
 322
 323     c->synthetic_clients_max_life =
 324          krb5_config_get_time_default(context, NULL, 300, "kdc",
 325                                       "synthetic_clients_max_life",
 326                                       NULL);
 327
 328     c->synthetic_clients_max_renew =
 329          krb5_config_get_time_default(context, NULL, 300, "kdc",
 330                                       "synthetic_clients_max_renew",
 331                                       NULL);
 332
 333     c->enable_gss_preauth =
 334         krb5_config_get_bool_default(context, NULL,
 335                                      c->enable_gss_preauth,
 336                                      "kdc",
 337                                      "enable_gss_preauth", NULL);
 338
 339     c->enable_gss_auth_data =
 340         krb5_config_get_bool_default(context, NULL,
 341                                      c->enable_gss_auth_data,
 342                                      "kdc",
 343                                      "enable_gss_auth_data", NULL);
 344
 345     ret = _kdc_gss_get_mechanism_config(context, "kdc",
 346                                         "gss_mechanisms_allowed",
 347                                         &c->gss_mechanisms_allowed);
 348     if (ret) {
 349         free(c);
 350         return ret;
 351     }
 352
 353     ret = _kdc_gss_get_mechanism_config(context, "kdc",
 354                                         "gss_cross_realm_mechanisms_allowed",
 355                                         &c->gss_cross_realm_mechanisms_allowed);
 356     if (ret) {
 357         OM_uint32 minor;
 358         gss_release_oid_set(&minor, &c->gss_mechanisms_allowed);
 359         free(c);
 360         return ret;
 361     }
 362
 363     *config = c;
 364
 365     return 0;
 366 }
 367
 368 krb5_error_code
 369 krb5_kdc_pkinit_config(krb5_context context, krb5_kdc_configuration *config)
 370 {
 371 #ifdef PKINIT
 372 #ifdef __APPLE__
 373     config->enable_pkinit = 1;
 374
 375     if (config->pkinit_kdc_identity == NULL) {
 376         if (config->pkinit_kdc_friendly_name == NULL)
 377             config->pkinit_kdc_friendly_name =
 378                 strdup("O=System Identity,CN=com.apple.kerberos.kdc");
 379         config->pkinit_kdc_identity = strdup("KEYCHAIN:");
 380     }
 381     if (config->pkinit_kdc_anchors == NULL)
 382         config->pkinit_kdc_anchors = strdup("KEYCHAIN:");
 383
 384 #endif /* __APPLE__ */
 385
 386     if (config->enable_pkinit) {
 387         if (config->pkinit_kdc_identity == NULL)
 388             krb5_errx(context, 1, "pkinit enabled but no identity");
 389
 390         if (config->pkinit_kdc_anchors == NULL)
 391             krb5_errx(context, 1, "pkinit enabled but no X509 anchors");
 392
 393         krb5_kdc_pk_initialize(context, config,
 394                                config->pkinit_kdc_identity,
 395                                config->pkinit_kdc_anchors,
 396                                config->pkinit_kdc_cert_pool,
 397                                config->pkinit_kdc_revoke);
 398
 399     }
 400
 401     return 0;
 402 #endif /* PKINIT */
 403 }