src/modules/rlm_ldap/rlm_ldap.c

   1 /*
   2  *   This program is is free software; you can redistribute it and/or modify
   3  *   it under the terms of the GNU General Public License, version 2 if the
   4  *   License as published by the Free Software Foundation.
   5  *
   6  *   This program is distributed in the hope that it will be useful,
   7  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  *   GNU General Public License for more details.
  10  *
  11  *   You should have received a copy of the GNU General Public License
  12  *   along with this program; if not, write to the Free Software
  13  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  14  */
  15
  16 /**
  17  * $Id$
  18  * @file rlm_ldap.c
  19  * @brief LDAP authorization and authentication module.
  20  *
  21  * @author Arran Cudbard-Bell <a.cudbardb@freeradius.org>
  22  * @author Alan DeKok <aland@freeradius.org>
  23  *
  24  * @copyright 2013 Network RADIUS SARL <info@networkradius.com>
  25  * @copyright 2012-2013 Arran Cudbard-Bell <a.cudbardb@freeradius.org>
  26  * @copyright 2012 Alan DeKok <aland@freeradius.org>
  27  * @copyright 1999-2013 The FreeRADIUS Server Project.
  28  */
  29 RCSID("$Id$")
  30
  31 #include        <freeradius-devel/rad_assert.h>
  32
  33 #include        <stdarg.h>
  34 #include        <ctype.h>
  35
  36 #include        "ldap.h"
  37
  38 /*
  39  *      Scopes
  40  */
  41 FR_NAME_NUMBER const ldap_scope[] = {
  42         { "sub",        LDAP_SCOPE_SUB  },
  43         { "one",        LDAP_SCOPE_ONE  },
  44         { "base",       LDAP_SCOPE_BASE },
  45 #ifdef LDAP_SCOPE_CHILDREN
  46         { "children",   LDAP_SCOPE_CHILDREN },
  47 #endif
  48         {  NULL , -1 }
  49 };
  50
  51 #ifdef LDAP_OPT_X_TLS_NEVER
  52 FR_NAME_NUMBER const ldap_tls_require_cert[] = {
  53         { "never",      LDAP_OPT_X_TLS_NEVER    },
  54         { "demand",     LDAP_OPT_X_TLS_DEMAND   },
  55         { "allow",      LDAP_OPT_X_TLS_ALLOW    },
  56         { "try",        LDAP_OPT_X_TLS_TRY      },
  57         { "hard",       LDAP_OPT_X_TLS_HARD     },      /* oh yes, just like that */
  58
  59         {  NULL , -1 }
  60 };
  61 #endif
  62
  63 FR_NAME_NUMBER const ldap_dereference[] = {
  64         { "never",      LDAP_DEREF_NEVER        },
  65         { "searching",  LDAP_DEREF_SEARCHING    },
  66         { "finding",    LDAP_DEREF_FINDING      },
  67         { "always",     LDAP_DEREF_ALWAYS       },
  68
  69         {  NULL , -1 }
  70 };
  71
  72 /*
  73  *      TLS Configuration
  74  */
  75 static CONF_PARSER tls_config[] = {
  76         /*
  77          *      Deprecated attributes
  78          */
  79         { "cacertfile", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT | PW_TYPE_DEPRECATED, ldap_instance_t, tls_ca_file), NULL },
  80         { "ca_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, ldap_instance_t, tls_ca_file), NULL },
  81
  82         { "cacertdir", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT | PW_TYPE_DEPRECATED, ldap_instance_t, tls_ca_path), NULL },
  83         { "ca_path", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, ldap_instance_t, tls_ca_path), NULL },
  84
  85         { "certfile", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT | PW_TYPE_DEPRECATED, ldap_instance_t, tls_certificate_file), NULL },
  86         { "certificate_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, ldap_instance_t, tls_certificate_file), NULL },
  87
  88         { "keyfile", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT | PW_TYPE_DEPRECATED, ldap_instance_t, tls_private_key_file), NULL }, // OK if it changes on HUP
  89         { "private_key_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, ldap_instance_t, tls_private_key_file), NULL }, // OK if it changes on HUP
  90
  91         { "randfile", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT | PW_TYPE_DEPRECATED, ldap_instance_t, tls_random_file), NULL },
  92         { "random_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, ldap_instance_t, tls_random_file), NULL },
  93
  94         /*
  95          *      LDAP Specific TLS attributes
  96          */
  97         { "start_tls", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, ldap_instance_t, start_tls), "no" },
  98         { "require_cert", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, tls_require_cert_str), NULL },
  99
 100         { NULL, -1, 0, NULL, NULL }
 101 };
 102
 103
 104 static CONF_PARSER profile_config[] = {
 105         { "filter", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, profile_filter), "(&)" },   //!< Correct filter for
 106                                                                                                 //!< when the DN is
 107                                                                                                 //!< known.
 108         { "attribute", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, profile_attr), NULL },
 109         { "default", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, default_profile), NULL },
 110
 111         { NULL, -1, 0, NULL, NULL }
 112 };
 113
 114 /*
 115  *      User configuration
 116  */
 117 static CONF_PARSER user_config[] = {
 118         { "filter", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, userobj_filter), "(uid=%u)" },
 119         { "scope", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, userobj_scope_str), "sub" },
 120         { "base_dn", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, userobj_base_dn), "" },
 121
 122         { "access_attribute", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, userobj_access_attr), NULL },
 123         { "access_positive", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, ldap_instance_t, access_positive), "yes" },
 124
 125         { NULL, -1, 0, NULL, NULL }
 126 };
 127
 128 /*
 129  *      Group configuration
 130  */
 131 static CONF_PARSER group_config[] = {
 132         { "filter", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, groupobj_filter), NULL },
 133         { "scope", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, groupobj_scope_str), "sub" },
 134         { "base_dn", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, groupobj_base_dn), "" },
 135
 136         { "name_attribute", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, groupobj_name_attr), "cn" },
 137         { "membership_attribute", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, userobj_membership_attr), NULL },
 138         { "membership_filter", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, groupobj_membership_filter), NULL },
 139         { "cacheable_name", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, ldap_instance_t, cacheable_group_name), "no" },
 140         { "cacheable_dn", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, ldap_instance_t, cacheable_group_dn), "no" },
 141         { "cache_attribute", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, cache_attribute), NULL },
 142
 143         { NULL, -1, 0, NULL, NULL }
 144 };
 145
 146 /*
 147  *      Client configuration
 148  */
 149 static CONF_PARSER client_attribute[] = {
 150         { "identifier", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, clientobj_identifier), "host" },
 151         { "shortname", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, clientobj_shortname), "cn" },
 152         { "nas_type", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, clientobj_type), NULL },
 153         { "secret", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, clientobj_secret), NULL },
 154         { "virtual_server", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, clientobj_server), NULL },
 155         { "require_message_authenticator", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, clientobj_require_ma), NULL },
 156
 157         { NULL, -1, 0, NULL, NULL }
 158 };
 159
 160 static CONF_PARSER client_config[] = {
 161         { "filter", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, clientobj_filter), NULL },
 162         { "scope", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, clientobj_scope_str), "sub" },
 163         { "base_dn", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, clientobj_base_dn), "" },
 164         { "attribute", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) client_attribute },
 165
 166         { NULL, -1, 0, NULL, NULL }
 167 };
 168
 169 /*
 170  *      Reference for accounting updates
 171  */
 172 static const CONF_PARSER acct_section_config[] = {
 173         { "reference", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_acct_section_t, reference), "." },
 174
 175         {NULL, -1, 0, NULL, NULL}
 176 };
 177
 178 /*
 179  *      Various options that don't belong in the main configuration.
 180  *
 181  *      Note that these overlap a bit with the connection pool code!
 182  */
 183 static CONF_PARSER option_config[] = {
 184         /*
 185          *      Debugging flags to the server
 186          */
 187         { "ldap_debug", FR_CONF_OFFSET(PW_TYPE_INTEGER, ldap_instance_t, ldap_debug), "0x0000" },
 188
 189         { "dereference", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, dereference_str), NULL },
 190
 191         { "chase_referrals", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, ldap_instance_t, chase_referrals), NULL },
 192
 193         { "rebind", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, ldap_instance_t, rebind), NULL },
 194
 195 #ifdef LDAP_OPT_NETWORK_TIMEOUT
 196         /* timeout on network activity */
 197         { "net_timeout", FR_CONF_OFFSET(PW_TYPE_INTEGER, ldap_instance_t, net_timeout), "10" },
 198 #endif
 199
 200         /* timeout for search results */
 201         { "res_timeout", FR_CONF_OFFSET(PW_TYPE_INTEGER, ldap_instance_t, res_timeout), "20" },
 202
 203         /* allow server unlimited time for search (server-side limit) */
 204         { "srv_timelimit", FR_CONF_OFFSET(PW_TYPE_INTEGER, ldap_instance_t, srv_timelimit), "20" },
 205
 206 #ifdef LDAP_OPT_X_KEEPALIVE_IDLE
 207         { "idle", FR_CONF_OFFSET(PW_TYPE_INTEGER, ldap_instance_t, keepalive_idle), "60" },
 208 #endif
 209 #ifdef LDAP_OPT_X_KEEPALIVE_PROBES
 210         { "probes", FR_CONF_OFFSET(PW_TYPE_INTEGER, ldap_instance_t, keepalive_probes), "3" },
 211 #endif
 212 #ifdef LDAP_OPT_X_KEEPALIVE_INTERVAL
 213         { "interval", FR_CONF_OFFSET(PW_TYPE_INTEGER, ldap_instance_t, keepalive_interval), "30" },
 214 #endif
 215
 216         { NULL, -1, 0, NULL, NULL }
 217 };
 218
 219
 220 static const CONF_PARSER module_config[] = {
 221         { "server", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_REQUIRED, ldap_instance_t, server), "localhost" },
 222         { "port", FR_CONF_OFFSET(PW_TYPE_SHORT, ldap_instance_t, port), "389" },
 223
 224         { "password", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_SECRET, ldap_instance_t, password), "" },
 225         { "identity", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, admin_dn), "" },
 226
 227         { "valuepair_attribute", FR_CONF_OFFSET(PW_TYPE_STRING, ldap_instance_t, valuepair_attr), NULL },
 228
 229 #ifdef WITH_EDIR
 230         /* support for eDirectory Universal Password */
 231         { "edir", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, ldap_instance_t, edir), NULL }, /* NULL defaults to "no" */
 232
 233         /*
 234          *      Attempt to bind with the cleartext password we got from eDirectory
 235          *      Universal password for additional authorization checks.
 236          */
 237         { "edir_autz", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, ldap_instance_t, edir_autz), NULL }, /* NULL defaults to "no" */
 238 #endif
 239
 240         { "read_clients", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, ldap_instance_t, do_clients), NULL }, /* NULL defaults to "no" */
 241
 242         { "user", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) user_config },
 243
 244         { "group", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) group_config },
 245
 246         { "client", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) client_config },
 247
 248         { "profile", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) profile_config },
 249
 250         { "options", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) option_config },
 251
 252         { "tls", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) tls_config },
 253
 254         {NULL, -1, 0, NULL, NULL}
 255 };
 256
 257 /** Expand an LDAP URL into a query, and return a string result from that query.
 258  *
 259  */
 260 static ssize_t ldap_xlat(void *instance, REQUEST *request, char const *fmt, char *out, size_t freespace)
 261 {
 262         ldap_rcode_t status;
 263         size_t len = 0;
 264         ldap_instance_t *inst = instance;
 265         LDAPURLDesc *ldap_url;
 266         LDAPMessage *result = NULL;
 267         LDAPMessage *entry = NULL;
 268         char **vals;
 269         ldap_handle_t *conn;
 270         int ldap_errno;
 271         char const *url;
 272         char const **attrs;
 273
 274         url = fmt;
 275
 276         if (!ldap_is_ldap_url(url)) {
 277                 REDEBUG("String passed does not look like an LDAP URL");
 278                 return -1;
 279         }
 280
 281         if (ldap_url_parse(url, &ldap_url)){
 282                 REDEBUG("Parsing LDAP URL failed");
 283                 return -1;
 284         }
 285
 286         /*
 287          *      Nothing, empty string, "*" string, or got 2 things, die.
 288          */
 289         if (!ldap_url->lud_attrs || !ldap_url->lud_attrs[0] ||
 290             !*ldap_url->lud_attrs[0] ||
 291             (strcmp(ldap_url->lud_attrs[0], "*") == 0) ||
 292             ldap_url->lud_attrs[1]) {
 293                 REDEBUG("Bad attributes list in LDAP URL. URL must specify exactly one attribute to retrieve");
 294
 295                 goto free_urldesc;
 296         }
 297
 298         if (ldap_url->lud_host &&
 299             ((strncmp(inst->server, ldap_url->lud_host, strlen(inst->server)) != 0) ||
 300              ((uint32_t) ldap_url->lud_port != inst->port))) {
 301                 RDEBUG("Requested server/port is \"%s:%i\"", ldap_url->lud_host, inst->port);
 302
 303                 goto free_urldesc;
 304         }
 305
 306         conn = rlm_ldap_get_socket(inst, request);
 307         if (!conn) goto free_urldesc;
 308
 309         memcpy(&attrs, &ldap_url->lud_attrs, sizeof(attrs));
 310
 311         status = rlm_ldap_search(inst, request, &conn, ldap_url->lud_dn, ldap_url->lud_scope, ldap_url->lud_filter,
 312                                  attrs, &result);
 313         switch (status) {
 314                 case LDAP_PROC_SUCCESS:
 315                         break;
 316                 case LDAP_PROC_NO_RESULT:
 317                         RDEBUG("Search returned not found");
 318                 default:
 319                         goto free_socket;
 320         }
 321
 322         rad_assert(conn);
 323         rad_assert(result);
 324
 325         entry = ldap_first_entry(conn->handle, result);
 326         if (!entry) {
 327                 ldap_get_option(conn->handle, LDAP_OPT_RESULT_CODE, &ldap_errno);
 328                 REDEBUG("Failed retrieving entry: %s", ldap_err2string(ldap_errno));
 329                 len = -1;
 330                 goto free_result;
 331         }
 332
 333         vals = ldap_get_values(conn->handle, entry, ldap_url->lud_attrs[0]);
 334         if (!vals) {
 335                 RDEBUG("No \"%s\" attributes found in specified object", ldap_url->lud_attrs[0]);
 336                 goto free_result;
 337         }
 338
 339         len = strlen(vals[0]);
 340         if (len >= freespace){
 341                 goto free_vals;
 342         }
 343
 344         strlcpy(out, vals[0], freespace);
 345
 346 free_vals:
 347         ldap_value_free(vals);
 348 free_result:
 349         ldap_msgfree(result);
 350 free_socket:
 351         rlm_ldap_release_socket(inst, conn);
 352 free_urldesc:
 353         ldap_free_urldesc(ldap_url);
 354
 355         return len;
 356 }
 357
 358 /** Perform LDAP-Group comparison checking
 359  *
 360  * Attempts to match users to groups using a variety of methods.
 361  *
 362  * @param instance of the rlm_ldap module.
 363  * @param request Current request.
 364  * @param thing Unknown.
 365  * @param check Which group to check for user membership.
 366  * @param check_pairs Unknown.
 367  * @param reply_pairs Unknown.
 368  * @return 1 on failure (or if the user is not a member), else 0.
 369  */
 370 static int rlm_ldap_groupcmp(void *instance, REQUEST *request, UNUSED VALUE_PAIR *thing, VALUE_PAIR *check,
 371                              UNUSED VALUE_PAIR *check_pairs, UNUSED VALUE_PAIR **reply_pairs)
 372 {
 373         ldap_instance_t *inst = instance;
 374         rlm_rcode_t     rcode;
 375
 376         bool            found = false;
 377         bool            check_is_dn;
 378
 379         ldap_handle_t   *conn = NULL;
 380         char const      *user_dn;
 381
 382         rad_assert(inst->groupobj_base_dn);
 383
 384         RDEBUG("Searching for user in group \"%s\"", check->vp_strvalue);
 385
 386         if (check->length == 0) {
 387                 RDEBUG("Cannot do comparison (group name is empty)");
 388                 return 1;
 389         }
 390
 391         /*
 392          *      Check if we can do cached membership verification
 393          */
 394         check_is_dn = rlm_ldap_is_dn(check->vp_strvalue);
 395         if ((check_is_dn && inst->cacheable_group_dn) || (!check_is_dn && inst->cacheable_group_name)) {
 396                 switch(rlm_ldap_check_cached(inst, request, check)) {
 397                         case RLM_MODULE_NOTFOUND:
 398                                 found = false;
 399                                 goto finish;
 400                         case RLM_MODULE_OK:
 401                                 found = true;
 402                                 goto finish;
 403                         /*
 404                          *      Fallback to dynamic search on failure
 405                          */
 406                         case RLM_MODULE_FAIL:
 407                         case RLM_MODULE_INVALID:
 408                         default:
 409                                 break;
 410                 }
 411         }
 412
 413         conn = rlm_ldap_get_socket(inst, request);
 414         if (!conn) return 1;
 415
 416         /*
 417          *      This is used in the default membership filter.
 418          */
 419         user_dn = rlm_ldap_find_user(inst, request, &conn, NULL, false, NULL, &rcode);
 420         if (!user_dn) {
 421                 rlm_ldap_release_socket(inst, conn);
 422                 return 1;
 423         }
 424
 425         rad_assert(conn);
 426
 427         /*
 428          *      Check groupobj user membership
 429          */
 430         if (inst->groupobj_membership_filter) {
 431                 switch(rlm_ldap_check_groupobj_dynamic(inst, request, &conn, check)) {
 432                         case RLM_MODULE_NOTFOUND:
 433                                 break;
 434                         case RLM_MODULE_OK:
 435                                 found = true;
 436                         default:
 437                                 goto finish;
 438                 }
 439         }
 440
 441         rad_assert(conn);
 442
 443         /*
 444          *      Check userobj group membership
 445          */
 446         if (inst->userobj_membership_attr) {
 447                 switch(rlm_ldap_check_userobj_dynamic(inst, request, &conn, user_dn, check)) {
 448                         case RLM_MODULE_NOTFOUND:
 449                                 break;
 450                         case RLM_MODULE_OK:
 451                                 found = true;
 452                         default:
 453                                 goto finish;
 454                 }
 455         }
 456
 457         rad_assert(conn);
 458
 459         finish:
 460         if (conn) {
 461                 rlm_ldap_release_socket(inst, conn);
 462         }
 463
 464         if (!found) {
 465                 RDEBUG("User is not a member of specified group");
 466
 467                 return 1;
 468         }
 469
 470         return 0;
 471 }
 472
 473 /** Detach from the LDAP server and cleanup internal state.
 474  *
 475  */
 476 static int mod_detach(void *instance)
 477 {
 478         ldap_instance_t *inst = instance;
 479
 480         fr_connection_pool_delete(inst->pool);
 481
 482         if (inst->user_map) {
 483                 talloc_free(inst->user_map);
 484         }
 485
 486         return 0;
 487 }
 488
 489 /** Parse an accounting sub section.
 490  *
 491  * Allocate a new ldap_acct_section_t and write the config data into it.
 492  *
 493  * @param[in] inst rlm_ldap configuration.
 494  * @param[in] parent of the config section.
 495  * @param[out] config to write the sub section parameters to.
 496  * @param[in] comp The section name were parsing the config for.
 497  * @return 0 on success, else < 0 on failure.
 498  */
 499 static int parse_sub_section(ldap_instance_t *inst, CONF_SECTION *parent, ldap_acct_section_t **config,
 500                              rlm_components_t comp)
 501 {
 502         CONF_SECTION *cs;
 503
 504         char const *name = section_type_value[comp].section;
 505
 506         cs = cf_section_sub_find(parent, name);
 507         if (!cs) {
 508                 INFO("rlm_ldap (%s): Couldn't find configuration for %s, will return NOOP for calls "
 509                        "from this section", inst->xlat_name, name);
 510
 511                 return 0;
 512         }
 513
 514         *config = talloc_zero(inst, ldap_acct_section_t);
 515         if (cf_section_parse(cs, *config, acct_section_config) < 0) {
 516                 LDAP_ERR("Failed parsing configuration for section %s", name);
 517
 518                 return -1;
 519         }
 520
 521         (*config)->cs = cs;
 522
 523         return 0;
 524 }
 525
 526 /** Instantiate the module
 527  *
 528  * Creates a new instance of the module reading parameters from a configuration section.
 529  *
 530  * @param conf to parse.
 531  * @param instance Where to write pointer to configuration data.
 532  * @return 0 on success < 0 on failure.
 533  */
 534 static int mod_instantiate(CONF_SECTION *conf, void *instance)
 535 {
 536         static bool version_done;
 537
 538         CONF_SECTION *options;
 539         ldap_instance_t *inst = instance;
 540
 541         inst->cs = conf;
 542
 543         options = cf_section_sub_find(conf, "options");
 544         if (!options || !cf_pair_find(options, "chase_referrals")) {
 545                 inst->chase_referrals_unset = true;      /* use OpenLDAP defaults */
 546         }
 547
 548         inst->xlat_name = cf_section_name2(conf);
 549         if (!inst->xlat_name) {
 550                 inst->xlat_name = cf_section_name1(conf);
 551         }
 552
 553         /*
 554          *      Get version info from the LDAP API.
 555          */
 556         if (!version_done) {
 557                 LDAPAPIInfo info;
 558
 559                 version_done = true;
 560
 561                 if (ldap_get_option(NULL, LDAP_OPT_API_INFO, &info) == LDAP_SUCCESS) {
 562                         if (strcmp(info.ldapai_vendor_name, LDAP_VENDOR_NAME) != 0) {
 563                                 WARN("rlm_ldap: libldap vendor changed since the server was built");
 564                                 WARN("rlm_ldap: linked: %s built: %s", info.ldapai_vendor_name, LDAP_VENDOR_NAME);
 565                         }
 566
 567                         if (info.ldapai_vendor_version != LDAP_VENDOR_VERSION) {
 568                                 WARN("rlm_ldap: libldap version changed since the server was built");
 569                                 WARN("rlm_ldap: linked: %i built: %i",
 570                                      info.ldapai_vendor_version, LDAP_VENDOR_VERSION);
 571                         }
 572
 573                         INFO("rlm_ldap: libldap vendor: %s version: %i", info.ldapai_vendor_name,
 574                              info.ldapai_vendor_version);
 575                         ldap_memfree(info.ldapai_extensions);
 576                 }
 577         }
 578
 579         /*
 580          *      If the configuration parameters can't be parsed, then fail.
 581          */
 582         if ((parse_sub_section(inst, conf, &inst->accounting, RLM_COMPONENT_ACCT) < 0) ||
 583             (parse_sub_section(inst, conf, &inst->postauth, RLM_COMPONENT_POST_AUTH) < 0)) {
 584                 LDAP_ERR("Failed parsing configuration");
 585
 586                 goto error;
 587         }
 588
 589         /*
 590          *      Sanity checks for cacheable groups code.
 591          */
 592         if (inst->cacheable_group_name && inst->groupobj_membership_filter) {
 593                 if (!inst->groupobj_name_attr) {
 594                         LDAP_ERR("Directive 'group.name_attribute' must be set if cacheable group names are enabled");
 595
 596                         goto error;
 597                 }
 598         }
 599
 600         /*
 601          *      Check for URLs.  If they're used and the library doesn't support them, then complain.
 602          */
 603         inst->is_url = 0;
 604         if (ldap_is_ldap_url(inst->server)) {
 605 #ifdef HAVE_LDAP_INITIALIZE
 606                 inst->is_url = 1;
 607                 inst->port = 0;
 608 #else
 609                 LDAP_ERR("Directive 'server' is in URL form but ldap_initialize() is not available");
 610                 goto error;
 611 #endif
 612         }
 613
 614 #ifdef LDAP_OPT_X_TLS_NEVER
 615         /*
 616          *      Workaround for servers which support LDAPS but not START TLS
 617          */
 618         if (inst->port == LDAPS_PORT || inst->tls_mode) {
 619                 inst->tls_mode = LDAP_OPT_X_TLS_HARD;
 620         } else {
 621                 inst->tls_mode = 0;
 622         }
 623 #endif
 624
 625         /*
 626          *      Convert dereference strings to enumerated constants
 627          */
 628         if (inst->dereference_str) {
 629                 inst->dereference = fr_str2int(ldap_dereference, inst->dereference_str, -1);
 630                 if (inst->dereference < 0) {
 631                         LDAP_ERR("Invalid 'dereference' value \"%s\", expected 'never', 'searching', "
 632                                  "'finding' or 'always'", inst->dereference_str);
 633                         goto error;
 634                 }
 635         }
 636
 637 #if LDAP_SET_REBIND_PROC_ARGS != 3
 638         /*
 639          *      The 2-argument rebind doesn't take an instance variable.  Our rebind function needs the instance
 640          *      variable for the username, password, etc.
 641          */
 642         if (inst->rebind == true) {
 643                 LDAP_ERR("Cannot use 'rebind' directive as this version of libldap does not support the API "
 644                          "that we need");
 645
 646                 goto error;
 647         }
 648 #endif
 649
 650         /*
 651          *      Convert scope strings to enumerated constants
 652          */
 653         inst->userobj_scope = fr_str2int(ldap_scope, inst->userobj_scope_str, -1);
 654         if (inst->userobj_scope < 0) {
 655                 LDAP_ERR("Invalid 'user.scope' value \"%s\", expected 'sub', 'one'"
 656 #ifdef LDAP_SCOPE_CHILDREN
 657                          ", 'base' or 'children'"
 658 #else
 659                          " or 'base'"
 660 #endif
 661                          , inst->userobj_scope_str);
 662                 goto error;
 663         }
 664
 665         inst->groupobj_scope = fr_str2int(ldap_scope, inst->groupobj_scope_str, -1);
 666         if (inst->groupobj_scope < 0) {
 667                 LDAP_ERR("Invalid 'group.scope' value \"%s\", expected 'sub', 'one'"
 668 #ifdef LDAP_SCOPE_CHILDREN
 669                          ", 'base' or 'children'"
 670 #else
 671                          " or 'base'"
 672 #endif
 673                          , inst->groupobj_scope_str);
 674                 goto error;
 675         }
 676
 677         inst->clientobj_scope = fr_str2int(ldap_scope, inst->clientobj_scope_str, -1);
 678         if (inst->clientobj_scope < 0) {
 679                 LDAP_ERR("Invalid 'client.scope' value \"%s\", expected 'sub', 'one'"
 680 #ifdef LDAP_SCOPE_CHILDREN
 681                          ", 'base' or 'children'"
 682 #else
 683                          " or 'base'"
 684 #endif
 685                          , inst->clientobj_scope_str);
 686                 goto error;
 687         }
 688
 689         if (inst->tls_require_cert_str) {
 690 #ifdef LDAP_OPT_X_TLS_NEVER
 691                 /*
 692                  *      Convert cert strictness to enumerated constants
 693                  */
 694                 inst->tls_require_cert = fr_str2int(ldap_tls_require_cert, inst->tls_require_cert_str, -1);
 695                 if (inst->tls_require_cert < 0) {
 696                         LDAP_ERR("Invalid 'tls.require_cert' value \"%s\", expected 'never', 'demand', 'allow', "
 697                                  "'try' or 'hard'", inst->tls_require_cert_str);
 698                         goto error;
 699                 }
 700 #else
 701                 LDAP_ERR("Modifying 'tls.require_cert' is not supported by current version of libldap. "
 702                          "Please upgrade or substitute current libldap and rebuild this module");
 703
 704                 goto error;
 705 #endif
 706         }
 707         /*
 708          *      Build the attribute map
 709          */
 710         if (rlm_ldap_map_verify(inst, &(inst->user_map)) < 0) {
 711                 goto error;
 712         }
 713
 714         /*
 715          *      Group comparison checks.
 716          */
 717         if (cf_section_name2(conf)) {
 718                 static ATTR_FLAGS flags;
 719                 char buffer[256];
 720
 721                 snprintf(buffer, sizeof(buffer), "%s-Ldap-Group", inst->xlat_name);
 722                 if (dict_addattr(buffer, -1, 0, PW_TYPE_STRING, flags) < 0) {
 723                         LDAP_ERR("Error creating group attribute: %s", fr_strerror());
 724
 725                         return -1;
 726                 }
 727                 inst->group_da = dict_attrbyname(buffer);
 728                 if (!inst->group_da) {
 729                         LDAP_ERR("Failed creating attribute %s", buffer);
 730
 731                         goto error;
 732                 }
 733
 734                 paircompare_register(inst->group_da, dict_attrbyvalue(PW_USER_NAME, 0), false, rlm_ldap_groupcmp, inst);
 735         /*
 736          *      Were the default instance
 737          */
 738         } else {
 739                 inst->group_da = dict_attrbyvalue(PW_LDAP_GROUP, 0);
 740                 paircompare_register(dict_attrbyvalue(PW_LDAP_GROUP, 0), dict_attrbyvalue(PW_USER_NAME, 0),
 741                                 false, rlm_ldap_groupcmp, inst);
 742         }
 743
 744         xlat_register(inst->xlat_name, ldap_xlat, rlm_ldap_escape_func, inst);
 745
 746         /*
 747          *      Setup the cache attribute
 748          */
 749         if (inst->cache_attribute) {
 750                 static ATTR_FLAGS flags;
 751
 752                 if (dict_addattr(inst->cache_attribute, -1, 0, PW_TYPE_STRING, flags) < 0) {
 753                         LDAP_ERR("Error creating cache attribute: %s", fr_strerror());
 754
 755                         return -1;
 756                 }
 757                 inst->cache_da = dict_attrbyname(inst->cache_attribute);
 758         } else {
 759                 inst->cache_da = inst->group_da;        /* Default to the group_da */
 760         }
 761
 762         /*
 763          *      Initialize the socket pool.
 764          */
 765         inst->pool = fr_connection_pool_init(inst->cs, inst, mod_conn_create, NULL, mod_conn_delete, NULL);
 766         if (!inst->pool) {
 767                 return -1;
 768         }
 769
 770         /*
 771          *      Bulk load dynamic clients.
 772          */
 773         if (inst->do_clients) {
 774                 if (rlm_ldap_load_clients(inst) < 0) {
 775                         LDAP_ERR("Error loading clients");
 776
 777                         return -1;
 778                 }
 779         }
 780
 781         return 0;
 782
 783 error:
 784         return -1;
 785 }
 786
 787 static rlm_rcode_t CC_HINT(nonnull) mod_authenticate(void *instance, REQUEST *request)
 788 {
 789         rlm_rcode_t     rcode;
 790         ldap_rcode_t    status;
 791         char const      *dn;
 792         ldap_instance_t *inst = instance;
 793         ldap_handle_t   *conn;
 794
 795         /*
 796          * Ensure that we're being passed a plain-text password, and not
 797          * anything else.
 798          */
 799
 800         if (!request->username) {
 801                 REDEBUG("Attribute \"User-Name\" is required for authentication");
 802
 803                 return RLM_MODULE_INVALID;
 804         }
 805
 806         if (!request->password ||
 807             (request->password->da->attr != PW_USER_PASSWORD)) {
 808                 RWDEBUG("You have set \"Auth-Type := LDAP\" somewhere");
 809                 RWDEBUG("*********************************************");
 810                 RWDEBUG("* THAT CONFIGURATION IS WRONG.  DELETE IT.   ");
 811                 RWDEBUG("* YOU ARE PREVENTING THE SERVER FROM WORKING");
 812                 RWDEBUG("*********************************************");
 813
 814                 REDEBUG("Attribute \"User-Password\" is required for authentication");
 815
 816                 return RLM_MODULE_INVALID;
 817         }
 818
 819         if (request->password->length == 0) {
 820                 REDEBUG("Empty password supplied");
 821
 822                 return RLM_MODULE_INVALID;
 823         }
 824
 825         RDEBUG("Login attempt by \"%s\"", request->username->vp_strvalue);
 826
 827         conn = rlm_ldap_get_socket(inst, request);
 828         if (!conn) return RLM_MODULE_FAIL;
 829
 830         /*
 831          *      Get the DN by doing a search.
 832          */
 833         dn = rlm_ldap_find_user(inst, request, &conn, NULL, false, NULL, &rcode);
 834         if (!dn) {
 835                 rlm_ldap_release_socket(inst, conn);
 836
 837                 return rcode;
 838         }
 839
 840         /*
 841          *      Bind as the user
 842          */
 843         conn->rebound = true;
 844         status = rlm_ldap_bind(inst, request, &conn, dn, request->password->vp_strvalue, true);
 845         switch (status) {
 846         case LDAP_PROC_SUCCESS:
 847                 rcode = RLM_MODULE_OK;
 848                 RDEBUG("Bind as user \"%s\" was successful", dn);
 849                 break;
 850
 851         case LDAP_PROC_NOT_PERMITTED:
 852                 rcode = RLM_MODULE_USERLOCK;
 853                 break;
 854
 855         case LDAP_PROC_REJECT:
 856                 rcode = RLM_MODULE_REJECT;
 857                 break;
 858
 859         case LDAP_PROC_BAD_DN:
 860                 rcode = RLM_MODULE_INVALID;
 861                 break;
 862
 863         case LDAP_PROC_NO_RESULT:
 864                 rcode = RLM_MODULE_NOTFOUND;
 865                 break;
 866
 867         default:
 868                 rcode = RLM_MODULE_FAIL;
 869                 break;
 870         };
 871
 872         rlm_ldap_release_socket(inst, conn);
 873
 874         return rcode;
 875 }
 876
 877 static rlm_rcode_t CC_HINT(nonnull) mod_authorize(void *instance, REQUEST *request)
 878 {
 879         rlm_rcode_t     rcode = RLM_MODULE_OK;
 880         ldap_rcode_t    status;
 881         int             ldap_errno;
 882         int             i;
 883         ldap_instance_t *inst = instance;
 884         char            **vals;
 885         VALUE_PAIR      *vp;
 886         ldap_handle_t   *conn;
 887         LDAPMessage     *result, *entry;
 888         char const      *dn = NULL;
 889         rlm_ldap_map_xlat_t     expanded; /* faster than mallocing every time */
 890
 891         if (!request->username) {
 892                 RDEBUG2("Attribute \"User-Name\" is required for authorization");
 893
 894                 return RLM_MODULE_NOOP;
 895         }
 896
 897         /*
 898          *      Check for valid input, zero length names not permitted
 899          */
 900         if (request->username->length == 0) {
 901                 RDEBUG2("Zero length username not permitted");
 902
 903                 return RLM_MODULE_INVALID;
 904         }
 905
 906         if (rlm_ldap_map_xlat(request, inst->user_map, &expanded) < 0) {
 907                 return RLM_MODULE_FAIL;
 908         }
 909
 910         conn = rlm_ldap_get_socket(inst, request);
 911         if (!conn) return RLM_MODULE_FAIL;
 912
 913         /*
 914          *      Add any additional attributes we need for checking access, memberships, and profiles
 915          */
 916         if (inst->userobj_access_attr) {
 917                 expanded.attrs[expanded.count++] = inst->userobj_access_attr;
 918         }
 919
 920         if (inst->userobj_membership_attr && (inst->cacheable_group_dn || inst->cacheable_group_name)) {
 921                 expanded.attrs[expanded.count++] = inst->userobj_membership_attr;
 922         }
 923
 924         if (inst->profile_attr) {
 925                 expanded.attrs[expanded.count++] = inst->profile_attr;
 926         }
 927
 928         if (inst->valuepair_attr) {
 929                 expanded.attrs[expanded.count++] = inst->valuepair_attr;
 930         }
 931
 932         expanded.attrs[expanded.count] = NULL;
 933
 934         dn = rlm_ldap_find_user(inst, request, &conn, expanded.attrs, true, &result, &rcode);
 935         if (!dn) {
 936                 goto finish;
 937         }
 938
 939         entry = ldap_first_entry(conn->handle, result);
 940         if (!entry) {
 941                 ldap_get_option(conn->handle, LDAP_OPT_RESULT_CODE, &ldap_errno);
 942                 REDEBUG("Failed retrieving entry: %s", ldap_err2string(ldap_errno));
 943
 944                 goto finish;
 945         }
 946
 947         /*
 948          *      Check for access.
 949          */
 950         if (inst->userobj_access_attr) {
 951                 rcode = rlm_ldap_check_access(inst, request, conn, entry);
 952                 if (rcode != RLM_MODULE_OK) {
 953                         goto finish;
 954                 }
 955         }
 956
 957         /*
 958          *      Check if we need to cache group memberships
 959          */
 960         if (inst->cacheable_group_dn || inst->cacheable_group_name) {
 961                 if (inst->userobj_membership_attr) {
 962                         rcode = rlm_ldap_cacheable_userobj(inst, request, &conn, entry, inst->userobj_membership_attr);
 963                         if (rcode != RLM_MODULE_OK) {
 964                                 goto finish;
 965                         }
 966                 }
 967
 968                 rcode = rlm_ldap_cacheable_groupobj(inst, request, &conn);
 969                 if (rcode != RLM_MODULE_OK) {
 970                         goto finish;
 971                 }
 972         }
 973
 974 #ifdef WITH_EDIR
 975         /*
 976          *      We already have a Cleartext-Password.  Skip edir.
 977          */
 978         if (pairfind(request->config_items, PW_CLEARTEXT_PASSWORD, 0, TAG_ANY)) {
 979                 goto skip_edir;
 980         }
 981
 982         /*
 983          *      Retrieve Universal Password if we use eDirectory
 984          */
 985         if (inst->edir) {
 986                 int res = 0;
 987                 char password[256];
 988                 size_t pass_size = sizeof(password);
 989
 990                 /*
 991                  *      Retrive universal password
 992                  */
 993                 res = nmasldap_get_password(conn->handle, dn, password, &pass_size);
 994                 if (res != 0) {
 995                         REDEBUG("Failed to retrieve eDirectory password: (%i) %s", res, edir_errstr(res));
 996                         rcode = RLM_MODULE_FAIL;
 997
 998                         goto finish;
 999                 }
1000
1001                 /*
1002                  *      Add Cleartext-Password attribute to the request
1003                  */
1004                 vp = radius_paircreate(request, &request->config_items, PW_CLEARTEXT_PASSWORD, 0);
1005                 pairstrcpy(vp, password);
1006                 vp->length = pass_size;
1007
1008                 if (RDEBUG_ENABLED3) {
1009                         RDEBUG3("Added eDirectory password.  control:%s += '%s'", vp->da->name, vp->vp_strvalue);
1010                 } else {
1011                         RDEBUG2("Added eDirectory password");
1012                 }
1013
1014                 if (inst->edir_autz) {
1015                         RDEBUG2("Binding as user for eDirectory authorization checks");
1016                         /*
1017                          *      Bind as the user
1018                          */
1019                         conn->rebound = true;
1020                         status = rlm_ldap_bind(inst, request, &conn, dn, vp->vp_strvalue, true);
1021                         switch (status) {
1022                         case LDAP_PROC_SUCCESS:
1023                                 rcode = RLM_MODULE_OK;
1024                                 RDEBUG("Bind as user '%s' was successful", dn);
1025                                 break;
1026
1027                         case LDAP_PROC_NOT_PERMITTED:
1028                                 rcode = RLM_MODULE_USERLOCK;
1029                                 goto finish;
1030
1031                         case LDAP_PROC_REJECT:
1032                                 rcode = RLM_MODULE_REJECT;
1033                                 goto finish;
1034
1035                         case LDAP_PROC_BAD_DN:
1036                                 rcode = RLM_MODULE_INVALID;
1037                                 goto finish;
1038
1039                         case LDAP_PROC_NO_RESULT:
1040                                 rcode = RLM_MODULE_NOTFOUND;
1041                                 goto finish;
1042
1043                         default:
1044                                 rcode = RLM_MODULE_FAIL;
1045                                 goto finish;
1046                         };
1047                 }
1048         }
1049
1050 skip_edir:
1051 #endif
1052
1053         /*
1054          *      Apply ONE user profile, or a default user profile.
1055          */
1056         if (inst->default_profile) {
1057                 char profile[1024];
1058
1059                 if (radius_xlat(profile, sizeof(profile), request, inst->default_profile, NULL, NULL) < 0) {
1060                         REDEBUG("Failed creating default profile string");
1061
1062                         rcode = RLM_MODULE_INVALID;
1063                         goto finish;
1064                 }
1065
1066                 rlm_ldap_map_profile(inst, request, &conn, profile, &expanded);
1067         }
1068
1069         /*
1070          *      Apply a SET of user profiles.
1071          */
1072         if (inst->profile_attr) {
1073                 vals = ldap_get_values(conn->handle, entry, inst->profile_attr);
1074                 if (vals != NULL) {
1075                         for (i = 0; vals[i] != NULL; i++) {
1076                                 rlm_ldap_map_profile(inst, request, &conn, vals[i], &expanded);
1077                         }
1078
1079                         ldap_value_free(vals);
1080                 }
1081         }
1082
1083         if (inst->user_map || inst->valuepair_attr) {
1084                 RDEBUG("Processing user attributes");
1085                 rlm_ldap_map_do(inst, request, conn->handle, &expanded, entry);
1086                 rlm_ldap_check_reply(inst, request);
1087         }
1088
1089 finish:
1090         rlm_ldap_map_xlat_free(&expanded);
1091         if (result) {
1092                 ldap_msgfree(result);
1093         }
1094         rlm_ldap_release_socket(inst, conn);
1095
1096         return rcode;
1097 }
1098
1099 /** Modify user's object in LDAP
1100  *
1101  * Process a modifcation map to update a user object in the LDAP directory.
1102  *
1103  * @param inst rlm_ldap instance.
1104  * @param request Current request.
1105  * @param section that holds the map to process.
1106  * @return one of the RLM_MODULE_* values.
1107  */
1108 static rlm_rcode_t user_modify(ldap_instance_t *inst, REQUEST *request, ldap_acct_section_t *section)
1109 {
1110         rlm_rcode_t     rcode = RLM_MODULE_OK;
1111         ldap_rcode_t    status;
1112
1113         ldap_handle_t   *conn = NULL;
1114
1115         LDAPMod         *mod_p[LDAP_MAX_ATTRMAP + 1], mod_s[LDAP_MAX_ATTRMAP];
1116         LDAPMod         **modify = mod_p;
1117
1118         char            *passed[LDAP_MAX_ATTRMAP * 2];
1119         int             i, total = 0, last_pass = 0;
1120
1121         char            *expanded[LDAP_MAX_ATTRMAP];
1122         int             last_exp = 0;
1123
1124         char const      *attr;
1125         char const      *value;
1126
1127         char const      *dn;
1128         /*
1129          *      Build our set of modifications using the update sections in
1130          *      the config.
1131          */
1132         CONF_ITEM       *ci;
1133         CONF_PAIR       *cp;
1134         CONF_SECTION    *cs;
1135         FR_TOKEN        op;
1136         char            path[MAX_STRING_LEN];
1137
1138         char            *p = path;
1139
1140         rad_assert(section);
1141
1142         /*
1143          *      Locate the update section were going to be using
1144          */
1145         if (section->reference[0] != '.') {
1146                 *p++ = '.';
1147         }
1148
1149         if (radius_xlat(p, (sizeof(path) - (p - path)) - 1, request, section->reference, NULL, NULL) < 0) {
1150                 goto error;
1151         }
1152
1153         ci = cf_reference_item(NULL, section->cs, path);
1154         if (!ci) {
1155                 goto error;
1156         }
1157
1158         if (!cf_item_is_section(ci)){
1159                 REDEBUG("Reference must resolve to a section");
1160
1161                 goto error;
1162         }
1163
1164         cs = cf_section_sub_find(cf_itemtosection(ci), "update");
1165         if (!cs) {
1166                 REDEBUG("Section must contain 'update' subsection");
1167
1168                 goto error;
1169         }
1170
1171         /*
1172          *      Iterate over all the pairs, building our mods array
1173          */
1174         for (ci = cf_item_find_next(cs, NULL); ci != NULL; ci = cf_item_find_next(cs, ci)) {
1175                 bool do_xlat = false;
1176
1177                 if (total == LDAP_MAX_ATTRMAP) {
1178                         REDEBUG("Modify map size exceeded");
1179
1180                         goto error;
1181                 }
1182
1183                 if (!cf_item_is_pair(ci)) {
1184                         REDEBUG("Entry is not in \"ldap-attribute = value\" format");
1185
1186                         goto error;
1187                 }
1188
1189                 /*
1190                  *      Retrieve all the information we need about the pair
1191                  */
1192                 cp = cf_itemtopair(ci);
1193                 value = cf_pair_value(cp);
1194                 attr = cf_pair_attr(cp);
1195                 op = cf_pair_operator(cp);
1196
1197                 if (!value || (*value == '\0')) {
1198                         RDEBUG("Empty value string, skipping attribute \"%s\"", attr);
1199
1200                         continue;
1201                 }
1202
1203                 switch (cf_pair_value_type(cp)) {
1204                 case T_BARE_WORD:
1205                 case T_SINGLE_QUOTED_STRING:
1206                         break;
1207
1208                 case T_BACK_QUOTED_STRING:
1209                 case T_DOUBLE_QUOTED_STRING:
1210                         do_xlat = true;
1211                         break;
1212
1213                 default:
1214                         rad_assert(0);
1215                         goto error;
1216                 }
1217
1218                 if (op == T_OP_CMP_FALSE) {
1219                         passed[last_pass] = NULL;
1220                 } else if (do_xlat) {
1221                         char *exp = NULL;
1222
1223                         if (radius_axlat(&exp, request, value, NULL, NULL) <= 0) {
1224                                 RDEBUG("Skipping attribute \"%s\"", attr);
1225
1226                                 talloc_free(exp);
1227
1228                                 continue;
1229                         }
1230
1231                         expanded[last_exp++] = exp;
1232                         passed[last_pass] = exp;
1233                 /*
1234                  *      Static strings
1235                  */
1236                 } else {
1237                         memcpy(&(passed[last_pass]), &value, sizeof(passed[last_pass]));
1238                 }
1239
1240                 passed[last_pass + 1] = NULL;
1241
1242                 mod_s[total].mod_values = &(passed[last_pass]);
1243
1244                 last_pass += 2;
1245
1246                 switch (op) {
1247                 /*
1248                  *  T_OP_EQ is *NOT* supported, it is impossible to
1249                  *  support because of the lack of transactions in LDAP
1250                  */
1251                 case T_OP_ADD:
1252                         mod_s[total].mod_op = LDAP_MOD_ADD;
1253                         break;
1254
1255                 case T_OP_SET:
1256                         mod_s[total].mod_op = LDAP_MOD_REPLACE;
1257                         break;
1258
1259                 case T_OP_SUB:
1260                 case T_OP_CMP_FALSE:
1261                         mod_s[total].mod_op = LDAP_MOD_DELETE;
1262                         break;
1263
1264 #ifdef LDAP_MOD_INCREMENT
1265                 case T_OP_INCRM:
1266                         mod_s[total].mod_op = LDAP_MOD_INCREMENT;
1267                         break;
1268 #endif
1269                 default:
1270                         REDEBUG("Operator '%s' is not supported for LDAP modify operations",
1271                                 fr_int2str(fr_tokens, op, "<INVALID>"));
1272
1273                         goto error;
1274                 }
1275
1276                 /*
1277                  *      Now we know the value is ok, copy the pointers into
1278                  *      the ldapmod struct.
1279                  */
1280                 memcpy(&(mod_s[total].mod_type), &attr, sizeof(mod_s[total].mod_type));
1281
1282                 mod_p[total] = &(mod_s[total]);
1283                 total++;
1284         }
1285
1286         if (total == 0) {
1287                 rcode = RLM_MODULE_NOOP;
1288                 goto release;
1289         }
1290
1291         mod_p[total] = NULL;
1292
1293         conn = rlm_ldap_get_socket(inst, request);
1294         if (!conn) return RLM_MODULE_FAIL;
1295
1296
1297         dn = rlm_ldap_find_user(inst, request, &conn, NULL, false, NULL, &rcode);
1298         if (!dn || (rcode != RLM_MODULE_OK)) {
1299                 goto error;
1300         }
1301
1302         status = rlm_ldap_modify(inst, request, &conn, dn, modify);
1303         switch (status) {
1304         case LDAP_PROC_SUCCESS:
1305                 break;
1306
1307         case LDAP_PROC_REJECT:
1308         case LDAP_PROC_BAD_DN:
1309                 rcode = RLM_MODULE_INVALID;
1310                 break;
1311
1312         default:
1313                 rcode = RLM_MODULE_FAIL;
1314                 break;
1315         };
1316
1317         release:
1318         error:
1319         /*
1320          *      Free up any buffers we allocated for xlat expansion
1321          */
1322         for (i = 0; i < last_exp; i++) {
1323                 talloc_free(expanded[i]);
1324         }
1325
1326         rlm_ldap_release_socket(inst, conn);
1327
1328         return rcode;
1329 }
1330
1331 static rlm_rcode_t CC_HINT(nonnull) mod_accounting(void *instance, REQUEST * request) {
1332         ldap_instance_t *inst = instance;
1333
1334         if (inst->accounting) {
1335                 return user_modify(inst, request, inst->accounting);
1336         }
1337
1338         return RLM_MODULE_NOOP;
1339 }
1340
1341 static rlm_rcode_t CC_HINT(nonnull) mod_post_auth(void *instance, REQUEST * request)
1342 {
1343         ldap_instance_t *inst = instance;
1344
1345         if (inst->postauth) {
1346                 return user_modify(inst, request, inst->postauth);
1347         }
1348
1349         return RLM_MODULE_NOOP;
1350 }
1351
1352
1353 /* globally exported name */
1354 module_t rlm_ldap = {
1355         RLM_MODULE_INIT,
1356         "ldap",
1357         RLM_TYPE_THREAD_SAFE,   /* type: reserved        */
1358         sizeof(ldap_instance_t),
1359         module_config,
1360         mod_instantiate,        /* instantiation         */
1361         mod_detach,             /* detach                */
1362         {
1363                 mod_authenticate,       /* authentication        */
1364                 mod_authorize,          /* authorization         */
1365                 NULL,                   /* preaccounting         */
1366                 mod_accounting,         /* accounting            */
1367                 NULL,                   /* checksimul            */
1368                 NULL,                   /* pre-proxy             */
1369                 NULL,                   /* post-proxy            */
1370                 mod_post_auth           /* post-auth */
1371         },
1372 };