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_armored_pa_enc_timestamp = TRUE;
 104     c->enable_unarmored_pa_enc_timestamp = TRUE;
 105     c->enable_pkinit = FALSE;
 106     c->pkinit_princ_in_cert = TRUE;
 107     c->pkinit_require_binding = TRUE;
 108     c->synthetic_clients = FALSE;
 109     c->pkinit_max_life_from_cert_extension = FALSE;
 110     c->pkinit_max_life_bound = 0;
 111     c->synthetic_clients_max_life = 300;
 112     c->synthetic_clients_max_renew = 300;
 113     c->pkinit_dh_min_bits = 1024;
 114     c->db = NULL;
 115     c->num_db = 0;
 116     c->logf = NULL;
 117
 118     c->num_kdc_processes =
 119         krb5_config_get_int_default(context, NULL, c->num_kdc_processes,
 120                                     "kdc", "num-kdc-processes", NULL);
 121
 122     c->require_preauth =
 123         krb5_config_get_bool_default(context, NULL,
 124                                      c->require_preauth,
 125                                      "kdc", "require-preauth", NULL);
 126 #ifdef DIGEST
 127     c->enable_digest =
 128         krb5_config_get_bool_default(context, NULL,
 129                                      FALSE,
 130                                      "kdc", "enable-digest", NULL);
 131
 132     {
 133         const char *digests;
 134
 135         digests = krb5_config_get_string(context, NULL,
 136                                          "kdc",
 137                                          "digests_allowed", NULL);
 138         if (digests == NULL)
 139             digests = "ntlm-v2";
 140         c->digests_allowed = parse_flags(digests,_kdc_digestunits, 0);
 141         if (c->digests_allowed == -1) {
 142             kdc_log(context, c, 0,
 143                     "unparsable digest units (%s), turning off digest",
 144                     digests);
 145             c->enable_digest = 0;
 146         } else if (c->digests_allowed == 0) {
 147             kdc_log(context, c, 0, "no digest enable, turning digest off");
 148             c->enable_digest = 0;
 149         }
 150     }
 151 #endif
 152
 153 #ifdef KX509
 154     c->enable_kx509 =
 155         krb5_config_get_bool_default(context, NULL,
 156                                      FALSE,
 157                                      "kdc", "enable_kx509", NULL);
 158 #endif
 159
 160     c->tgt_use_strongest_session_key =
 161         krb5_config_get_bool_default(context, NULL,
 162                                      c->tgt_use_strongest_session_key,
 163                                      "kdc",
 164                                      "tgt-use-strongest-session-key", NULL);
 165     c->preauth_use_strongest_session_key =
 166         krb5_config_get_bool_default(context, NULL,
 167                                      c->preauth_use_strongest_session_key,
 168                                      "kdc",
 169                                      "preauth-use-strongest-session-key", NULL);
 170     c->svc_use_strongest_session_key =
 171         krb5_config_get_bool_default(context, NULL,
 172                                      c->svc_use_strongest_session_key,
 173                                      "kdc",
 174                                      "svc-use-strongest-session-key", NULL);
 175     c->use_strongest_server_key =
 176         krb5_config_get_bool_default(context, NULL,
 177                                      c->use_strongest_server_key,
 178                                      "kdc",
 179                                      "use-strongest-server-key", NULL);
 180
 181     c->check_ticket_addresses =
 182         krb5_config_get_bool_default(context, NULL,
 183                                      c->check_ticket_addresses,
 184                                      "kdc",
 185                                      "check-ticket-addresses", NULL);
 186     c->warn_ticket_addresses =
 187         krb5_config_get_bool_default(context, NULL,
 188                                      c->warn_ticket_addresses,
 189                                      "kdc",
 190                                      "warn_ticket_addresses", NULL);
 191     c->allow_null_ticket_addresses =
 192         krb5_config_get_bool_default(context, NULL,
 193                                      c->allow_null_ticket_addresses,
 194                                      "kdc",
 195                                      "allow-null-ticket-addresses", NULL);
 196
 197     c->allow_anonymous =
 198         krb5_config_get_bool_default(context, NULL,
 199                                      c->allow_anonymous,
 200                                      "kdc",
 201                                      "allow-anonymous", NULL);
 202
 203     c->historical_anon_realm =
 204         krb5_config_get_bool_default(context, NULL,
 205                                      c->historical_anon_realm,
 206                                      "kdc",
 207                                      "historical_anon_realm", NULL);
 208
 209     c->strict_nametypes =
 210         krb5_config_get_bool_default(context, NULL,
 211                                      c->strict_nametypes,
 212                                      "kdc",
 213                                      "strict-nametypes", NULL);
 214
 215     c->max_datagram_reply_length =
 216         krb5_config_get_int_default(context,
 217                                     NULL,
 218                                     1400,
 219                                     "kdc",
 220                                     "max-kdc-datagram-reply-length",
 221                                     NULL);
 222
 223     {
 224         const char *trpolicy_str;
 225
 226         trpolicy_str =
 227             krb5_config_get_string_default(context, NULL, "DEFAULT", "kdc",
 228                                            "transited-policy", NULL);
 229         if(strcasecmp(trpolicy_str, "always-check") == 0) {
 230             c->trpolicy = TRPOLICY_ALWAYS_CHECK;
 231         } else if(strcasecmp(trpolicy_str, "allow-per-principal") == 0) {
 232             c->trpolicy = TRPOLICY_ALLOW_PER_PRINCIPAL;
 233         } else if(strcasecmp(trpolicy_str, "always-honour-request") == 0) {
 234             c->trpolicy = TRPOLICY_ALWAYS_HONOUR_REQUEST;
 235         } else if(strcasecmp(trpolicy_str, "DEFAULT") == 0) {
 236             /* default */
 237         } else {
 238             kdc_log(context, c, 0,
 239                     "unknown transited-policy: %s, "
 240                     "reverting to default (always-check)",
 241                     trpolicy_str);
 242         }
 243     }
 244
 245     c->encode_as_rep_as_tgs_rep =
 246         krb5_config_get_bool_default(context, NULL,
 247                                      c->encode_as_rep_as_tgs_rep,
 248                                      "kdc",
 249                                      "encode_as_rep_as_tgs_rep", NULL);
 250
 251     c->kdc_warn_pwexpire =
 252         krb5_config_get_time_default (context, NULL,
 253                                       c->kdc_warn_pwexpire,
 254                                       "kdc", "kdc_warn_pwexpire", NULL);
 255
 256     c->enable_armored_pa_enc_timestamp =
 257         krb5_config_get_bool_default(context,
 258                                      NULL,
 259                                      c->enable_armored_pa_enc_timestamp,
 260                                      "kdc",
 261                                      "enable_armored_pa_enc_timestamp",
 262                                      NULL);
 263
 264     c->enable_unarmored_pa_enc_timestamp =
 265         krb5_config_get_bool_default(context,
 266                                      NULL,
 267                                      c->enable_unarmored_pa_enc_timestamp,
 268                                      "kdc",
 269                                      "enable_unarmored_pa_enc_timestamp",
 270                                      NULL);
 271
 272     c->enable_pkinit =
 273         krb5_config_get_bool_default(context,
 274                                      NULL,
 275                                      c->enable_pkinit,
 276                                      "kdc",
 277                                      "enable-pkinit",
 278                                      NULL);
 279
 280
 281     c->pkinit_kdc_identity =
 282         krb5_config_get_string(context, NULL,
 283                                "kdc", "pkinit_identity", NULL);
 284     c->pkinit_kdc_anchors =
 285         krb5_config_get_string(context, NULL,
 286                                "kdc", "pkinit_anchors", NULL);
 287     c->pkinit_kdc_cert_pool =
 288         krb5_config_get_strings(context, NULL,
 289                                 "kdc", "pkinit_pool", NULL);
 290     c->pkinit_kdc_revoke =
 291         krb5_config_get_strings(context, NULL,
 292                                 "kdc", "pkinit_revoke", NULL);
 293     c->pkinit_kdc_ocsp_file =
 294         krb5_config_get_string(context, NULL,
 295                                "kdc", "pkinit_kdc_ocsp", NULL);
 296     c->pkinit_kdc_friendly_name =
 297         krb5_config_get_string(context, NULL,
 298                                "kdc", "pkinit_kdc_friendly_name", NULL);
 299     c->pkinit_princ_in_cert =
 300         krb5_config_get_bool_default(context, NULL,
 301                                      c->pkinit_princ_in_cert,
 302                                      "kdc",
 303                                      "pkinit_principal_in_certificate",
 304                                      NULL);
 305     c->pkinit_require_binding =
 306         krb5_config_get_bool_default(context, NULL,
 307                                      c->pkinit_require_binding,
 308                                      "kdc",
 309                                      "pkinit_win2k_require_binding",
 310                                      NULL);
 311     c->pkinit_dh_min_bits =
 312         krb5_config_get_int_default(context, NULL,
 313                                     0,
 314                                     "kdc", "pkinit_dh_min_bits", NULL);
 315
 316     c->pkinit_max_life_from_cert_extension =
 317         krb5_config_get_bool_default(context, NULL,
 318                                      c->pkinit_max_life_from_cert_extension,
 319                                      "kdc",
 320                                      "pkinit_max_life_from_cert_extension",
 321                                      NULL);
 322
 323     c->synthetic_clients =
 324         krb5_config_get_bool_default(context, NULL,
 325                                      c->synthetic_clients,
 326                                      "kdc",
 327                                      "synthetic_clients",
 328                                      NULL);
 329
 330     c->pkinit_max_life_bound =
 331          krb5_config_get_time_default(context, NULL, 0, "kdc",
 332                                       "pkinit_max_life_bound",
 333                                       NULL);
 334
 335     c->pkinit_max_life_from_cert =
 336          krb5_config_get_time_default(context, NULL, 0, "kdc",
 337                                       "pkinit_max_life_from_cert",
 338                                       NULL);
 339
 340     c->synthetic_clients_max_life =
 341          krb5_config_get_time_default(context, NULL, 300, "kdc",
 342                                       "synthetic_clients_max_life",
 343                                       NULL);
 344
 345     c->synthetic_clients_max_renew =
 346          krb5_config_get_time_default(context, NULL, 300, "kdc",
 347                                       "synthetic_clients_max_renew",
 348                                       NULL);
 349
 350     c->enable_gss_preauth =
 351         krb5_config_get_bool_default(context, NULL,
 352                                      c->enable_gss_preauth,
 353                                      "kdc",
 354                                      "enable_gss_preauth", NULL);
 355
 356     c->enable_gss_auth_data =
 357         krb5_config_get_bool_default(context, NULL,
 358                                      c->enable_gss_auth_data,
 359                                      "kdc",
 360                                      "enable_gss_auth_data", NULL);
 361
 362     ret = _kdc_gss_get_mechanism_config(context, "kdc",
 363                                         "gss_mechanisms_allowed",
 364                                         &c->gss_mechanisms_allowed);
 365     if (ret) {
 366         free(c);
 367         return ret;
 368     }
 369
 370     ret = _kdc_gss_get_mechanism_config(context, "kdc",
 371                                         "gss_cross_realm_mechanisms_allowed",
 372                                         &c->gss_cross_realm_mechanisms_allowed);
 373     if (ret) {
 374         OM_uint32 minor;
 375         gss_release_oid_set(&minor, &c->gss_mechanisms_allowed);
 376         free(c);
 377         return ret;
 378     }
 379
 380     *config = c;
 381
 382     return 0;
 383 }
 384
 385 krb5_error_code
 386 krb5_kdc_pkinit_config(krb5_context context, krb5_kdc_configuration *config)
 387 {
 388 #ifdef PKINIT
 389 #ifdef __APPLE__
 390     config->enable_pkinit = 1;
 391
 392     if (config->pkinit_kdc_identity == NULL) {
 393         if (config->pkinit_kdc_friendly_name == NULL)
 394             config->pkinit_kdc_friendly_name =
 395                 strdup("O=System Identity,CN=com.apple.kerberos.kdc");
 396         config->pkinit_kdc_identity = strdup("KEYCHAIN:");
 397     }
 398     if (config->pkinit_kdc_anchors == NULL)
 399         config->pkinit_kdc_anchors = strdup("KEYCHAIN:");
 400
 401 #endif /* __APPLE__ */
 402
 403     if (config->enable_pkinit) {
 404         if (config->pkinit_kdc_identity == NULL)
 405             krb5_errx(context, 1, "pkinit enabled but no identity");
 406
 407         if (config->pkinit_kdc_anchors == NULL)
 408             krb5_errx(context, 1, "pkinit enabled but no X509 anchors");
 409
 410         krb5_kdc_pk_initialize(context, config,
 411                                config->pkinit_kdc_identity,
 412                                config->pkinit_kdc_anchors,
 413                                config->pkinit_kdc_cert_pool,
 414                                config->pkinit_kdc_revoke);
 415
 416     }
 417
 418     return 0;
 419 #endif /* PKINIT */
 420 }