src/modules/rlm_ldap/rlm_ldap.c

   1 /*
   2  * rlm_ldap.c   LDAP authorization and authentication module.
   3  *
   4  *   This program is free software; you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as published by
   6  *   the Free Software Foundation; either version 2 of the License, or
   7  *   (at your option) any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program; if not, write to the Free Software
  16  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  *
  18  * This module is based on LDAP patch to Cistron radiusd by James Golovich
  19  * <james@wwnet.net>, which in turn was based mostly on a Mysql+Cistron patch
  20  * from <oyarzun@wilmington.net>
  21  *
  22  * 17 Jan 2000, Adrian Pavlykevych <pam@polynet.lviv.ua>
  23  *      - OpenLDAP SDK porting, basic TLS support, LDAP authorization,
  24  *        fault tolerance with multiple LDAP server support
  25  * 24 May 2000, Adrian Pavlykevych <pam@polynet.lviv.ua>
  26  *      - Converting to new configuration file format, futher improvements
  27  *        in fault tolerance, threaded operation
  28  * 12 Dec 2000, Adrian Pavlykevych <pam@polynet.lviv.ua>
  29  *      - Added preliminary support for multiple instances
  30  *      - moved all instance configuration into dynamicly allocated structure
  31  *      - Removed connection maintenance thread and all attempts for multihreading
  32  *        the module itself. OpenLDAP SDK is not thread safe when used with shared
  33  *        LDAP connection.
  34  *      - Added configuration option for defining LDAP attribute of user object,
  35  *        which controls remote access.
  36  * 16 Feb 2001, Hannu Laurila <hannu.laurila@japo.fi>
  37  *      - LDAP<->RADIUS attribute mappings are now read from a file
  38  *      - Support for generic RADIUS check and reply attribute.
  39  * Jun 2001, Kostas Kalevras <kkalev@noc.ntua.gr>
  40  *      - Fix: check and reply attributes from LDAP _replace_ existing ones
  41  *      - Added "default_profile" directive, which points to radiusProfile
  42  *        object, which contains default values for RADIUS users
  43  *      - Added "profile_attribute" directive, which specifies user object
  44  *        attribute pointing to radiusProfile object.
  45  * Nov 2001, Kostas Kalevras <kkalev@noc.ntua.gr>
  46  *      - Added support for adding the user password to the check. Based on
  47  *        the password_header directive rlm_ldap will strip the
  48  *        password header if needed. This will make support for CHAP much easier.
  49  *      - Added module messages when we reject a user.
  50  *      - Added ldap_groupcmp to allow searching for user group membership.
  51  *      - Added ldap_xlat to allow ldap urls in xlat strings. Something like:
  52  *        %{ldap:ldap:///dc=company,dc=com?cn?sub?uid=user}
  53  * Nov 2001, Gordon Tetlow <gordont@gnf.org>
  54  *      - Do an xlat on the access_group attribute.
  55  * Dec 2001, Kostas Kalevras <kkalev@noc.ntua.gr>
  56  *      - Added ldap caching for the default/regular profiles and group entries.
  57  *      - Fixed a memory leak in ldap_xlat.
  58  *      - Removed dict_attrbyname from ldap_pairget. They are not needed.
  59  *      - Moved the radius_xlat's for filter and basedn in ldap_authenticate() to
  60  *        the right place.
  61  *      - Made the module thread safe. We create a connection pool and each thread
  62  *        will call ldap_get_conn to lock one of the ldap connections and release with
  63  *        a call to ldap_release_conn when it has finished.
  64  *      - Request only the user attributes that interest us (radius attributes,regular
  65  *        profile,user password and access attribute).
  66  * Mar 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
  67  *      - Fixed a bug where the ldap server will kill the idle connections from the ldap
  68  *        connection pool. We now check if ldap_search returns LDAP_SERVER_DOWN and try to
  69  *        reconnect if it does. Bug noted by Dan Perik <dan_perik-work@ntm.org.pg>
  70  * May 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
  71  *      - Instead of the Group attribute we now have the Ldap-Group attribute, to avoid
  72  *        collisions with other modules
  73  *      - If perform_search fails check the ld != NULL before using it. Based on a bug report
  74  *        by John <jhogenmiller@pennswoods.net>
  75  * Jun 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
  76  *      - Add the ability to do a paircmp on the check items. Add a compare_check_items boolean
  77  *        configuration directive which defaults to no. If it is set then we will do a compare
  78  *      - Add another configuration directive. access_attr_used_for_allow. If it is set to yes
  79  *        then the access_attr will be used to allow user access. If it is set to no then it will
  80  *        be used to deny user access.
  81  *      - Remember to free inst->atts in ldap_detach()
  82  *      - Add a forgotten ldap_free_urldesc in ldap_xlat()
  83  *      - Add a variable locked in the LDAP_CONN structure. We use this to avoid deadlocks. The mutex
  84  *        we are using is of type fast and can deadlock if the same thread tries to relock it. That
  85  *        could happen in case of calls to xlat.
  86  *      - When ldap_search returns NO_SUCH_OBJECT don't return fail but notfound
  87  * Jul 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
  88  *      - Fix the logic when we get an LDAP_SERVER_DOWN or we have conn->ld == NULL in perform_search
  89  *      - Try to minimize the penalty of having the ldap server go down. The comments before
  90  *        MAX_FAILED_CONNS_* definitions should explain things.
  91  *      - Check for a number of error codes from ldap_search and log corresponding error messages
  92  *        We should only reconnect when that can help things.
  93  *      - In ldap_groupcmp instead of first searching for the group object and then checking user
  94  *        group membership combine them in one ldap search operation. That should make group
  95  *        membership checks a lot faster.
  96  *      - Remember to do ldap_release_conn and ldap_msgfree when we do paircmp and the result is reject
  97  * Aug 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
  98  *      - Add support for group membership attribute inside the user entry in ldap_groupcmp. The attribute
  99  *        can either contain the name or the DN of the group. Added the groupmembership_attribute
 100  *        configuration directive
 101  *      - Move the ldap_{get,release}_conn in ldap_groupcmp so that we hold a connection for the minimum time.
 102  *      - Now that ldap_groupcmp is complete we really don't need access_group. Removed it.
 103  *      - Remember to free groupmembership_attribute in ldap_detach
 104  *      - Don't delete existing generic attributes in ldap_pairget when adding new ones. Since generic attributes
 105  *        have operators we don't need to try to be cleaver.
 106  * Sep 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
 107  *      - Fix a crash in ldap_pairget when the attribute value is larger than the buffer size
 108  *        Bug report by Stefan Radovanovici <sra@rtsffm.com>
 109  *      - If we add a check item then use the == operator. Based on an idea by Allister Maguire <amaguire@gnc.net.nz>
 110  *      - Only add a failure message for bind as user failed in ldap_authenticate if the result of ldap_connect was
 111  *        RLM_MODULE_REJECT
 112  *      - Make tls_mode a configurable option. Patch from John <jhogenmiller@pennswoods.net>
 113  *      - Allow multiple regular profiles for an entry
 114  * Oct 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
 115  *      - Disable cache after searching for the default profile
 116  *      - Use the MAX_FAILED_CONNS_* in ldap_authenticate() when calling ldap_connect()
 117  * Nov 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
 118  *      - Set LDAP version to V3 before binding. Now freeradius should work with openldap21
 119  * Dec 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
 120  *      - Set default values for the server and basedn parameters
 121  * Feb 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
 122  *      - Add support for ldap_initialize. That way we can specify the server as an ldap url.
 123  *        Based on ideas from Derrik Pates <dpates@dsdk12.net>
 124  * Mar 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
 125  *      - Add an ldap_escape_func. Escape the * character from the filter so that we can avoid
 126  *        the trivial DoS of username=*
 127  *      - Remove the caching code. It does not exist in openldap21.
 128  *        Based on a report from Mike Denka <mdenk@whidbey.net>
 129  * May 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
 130  *      - Don't do a double free on the attribute maps. Bug noted by Derrik Pates <dpates@dsdk12.net>
 131  *      - Apply a patch from Alexander M. Pravking <fduch@antar.bryansk.ru> to do an xlat on the
 132  *        retrieved attributes.
 133  * Aug 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
 134  *      - In case of a bad search filter, print out the corresponding filter
 135  * Sep 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
 136  *      - Compile even if we don't have pthread's
 137  */
 138 static const char rcsid[] = "$Id$";
 139
 140 #include "autoconf.h"
 141
 142 #include        <sys/types.h>
 143 #include        <sys/socket.h>
 144 #include        <sys/time.h>
 145 #include        <netinet/in.h>
 146
 147 #include        <stdio.h>
 148 #include        <stdlib.h>
 149 #include        <netdb.h>
 150 #include        <pwd.h>
 151 #include        <time.h>
 152 #include        <ctype.h>
 153 #include        <string.h>
 154
 155 #include        <lber.h>
 156 #include        <ldap.h>
 157
 158 #include        <errno.h>
 159 #include        <unistd.h>
 160 #include        <pthread.h>
 161
 162 #include        "libradius.h"
 163 #include        "radiusd.h"
 164 #include        "conffile.h"
 165 #include        "modules.h"
 166 #include        "rad_assert.h"
 167
 168 #ifndef HAVE_PTHREAD_H
 169 /*
 170  *      This is a lot simpler than putting ifdef's around
 171  *      every use of the pthread functions.
 172  */
 173 #define pthread_mutex_lock(a)
 174 #define pthread_mutex_unlock(a)
 175 #define pthread_mutex_init(a,b)
 176 #define pthread_mutex_destroy(a)
 177 #endif
 178
 179
 180 #define MAX_FILTER_STR_LEN      1024
 181 #define TIMELIMIT 5
 182
 183 /*
 184  * These are used in case ldap_search returns LDAP_SERVER_DOWN
 185  * In that case we do conn->failed_conns++ and then check it:
 186  * If conn->failed_conns <= MAX_FAILED_CONNS_START then we try
 187  * to reconnect
 188  * conn->failed_conns is also checked on entrance in perform_search:
 189  * If conn->failed_conns > MAX_FAILED_CONNS_START then we don't
 190  * try to do anything and we just do conn->failed_conns++ and
 191  * return RLM_MODULE_FAIL
 192  * if conn->failed_conns >= MAX_FAILED_CONNS_END then we give it
 193  * another chance and we set it to MAX_FAILED_CONNS_RESTART and
 194  * try to reconnect.
 195  *
 196  *
 197  * We are assuming that the majority of the LDAP_SERVER_DOWN cases
 198  * will either be an ldap connection timeout or a temporary ldap
 199  * server problem.
 200  * As a result we make a few attempts to reconnect hoping that the problem
 201  * will soon go away. If it does not go away then we just return
 202  * RLM_MODULE_FAIL on entrance in perform_search until conn->failed_conns
 203  * gets to MAX_FAILED_CONNS_END. After that we give it one more chance by
 204  * going back to MAX_FAILED_CONNS_RESTART
 205  *
 206  */
 207
 208 #define MAX_FAILED_CONNS_END            20
 209 #define MAX_FAILED_CONNS_RESTART        4
 210 #define MAX_FAILED_CONNS_START          5
 211
 212 /* linked list of mappings between RADIUS attributes and LDAP attributes */
 213 struct TLDAP_RADIUS {
 214         char*                 attr;
 215         char*                 radius_attr;
 216         struct TLDAP_RADIUS*  next;
 217 };
 218 typedef struct TLDAP_RADIUS TLDAP_RADIUS;
 219
 220 typedef struct ldap_conn {
 221         LDAP            *ld;
 222         char            bound;
 223         char            locked;
 224         int             failed_conns;
 225         pthread_mutex_t mutex;
 226 } LDAP_CONN;
 227
 228 typedef struct {
 229         char           *server;
 230         int             port;
 231         int             timelimit;
 232         struct timeval  net_timeout;
 233         struct timeval  timeout;
 234         int             debug;
 235         int             tls_mode;
 236         int             start_tls;
 237         int             num_conns;
 238         int             do_comp;
 239         int             default_allow;
 240         int             failed_conns;
 241         int             is_url;
 242         char           *login;
 243         char           *password;
 244         char           *filter;
 245         char           *basedn;
 246         char           *default_profile;
 247         char           *profile_attr;
 248         char           *access_attr;
 249         char           *passwd_hdr;
 250         char           *passwd_attr;
 251         char           *dictionary_mapping;
 252         char           *groupname_attr;
 253         char           *groupmemb_filt;
 254         char           *groupmemb_attr;
 255         char            **atts;
 256         TLDAP_RADIUS   *check_item_map;
 257         TLDAP_RADIUS   *reply_item_map;
 258         LDAP_CONN       *conns;
 259         int             ldap_debug; /* Debug flag for LDAP SDK */
 260         char            *xlat_name; /* name used to xlat */
 261 }               ldap_instance;
 262
 263 static CONF_PARSER module_config[] = {
 264         {"server", PW_TYPE_STRING_PTR, offsetof(ldap_instance,server), NULL, "localhost"},
 265         {"port", PW_TYPE_INTEGER, offsetof(ldap_instance,port), NULL, "389"},
 266         /* wait forever on network activity */
 267         {"net_timeout", PW_TYPE_INTEGER, offsetof(ldap_instance,net_timeout.tv_sec), NULL, "10"},
 268         /* wait forever for search results */
 269         {"timeout", PW_TYPE_INTEGER, offsetof(ldap_instance,timeout.tv_sec), NULL, "20"},
 270         /* allow server unlimited time for search (server-side limit) */
 271         {"timelimit", PW_TYPE_INTEGER, offsetof(ldap_instance,timelimit), NULL, "20"},
 272         {"identity", PW_TYPE_STRING_PTR, offsetof(ldap_instance,login), NULL, ""},
 273         {"start_tls", PW_TYPE_BOOLEAN, offsetof(ldap_instance,start_tls), NULL, "no"},
 274         {"password", PW_TYPE_STRING_PTR, offsetof(ldap_instance,password), NULL, ""},
 275         {"basedn", PW_TYPE_STRING_PTR, offsetof(ldap_instance,basedn), NULL, "o=notexist"},
 276         {"filter", PW_TYPE_STRING_PTR, offsetof(ldap_instance,filter), NULL, "(uid=%u)"},
 277         {"default_profile", PW_TYPE_STRING_PTR, offsetof(ldap_instance,default_profile), NULL, NULL},
 278         {"profile_attribute", PW_TYPE_STRING_PTR, offsetof(ldap_instance,profile_attr), NULL, NULL},
 279         {"password_header", PW_TYPE_STRING_PTR, offsetof(ldap_instance,passwd_hdr), NULL, NULL},
 280         {"password_attribute", PW_TYPE_STRING_PTR, offsetof(ldap_instance,passwd_attr), NULL, NULL},
 281         /* LDAP attribute name that controls remote access */
 282         {"access_attr", PW_TYPE_STRING_PTR, offsetof(ldap_instance,access_attr), NULL, NULL},
 283         /* file with mapping between LDAP and RADIUS attributes */
 284         {"groupname_attribute", PW_TYPE_STRING_PTR, offsetof(ldap_instance,groupname_attr), NULL, "cn"},
 285         {"groupmembership_filter", PW_TYPE_STRING_PTR, offsetof(ldap_instance,groupmemb_filt), NULL, "(|(&(objectClass=GroupOfNames)(member=%{Ldap-UserDn}))(&(objectClass=GroupOfUniqueNames)(uniquemember=%{Ldap-UserDn})))"},
 286         {"groupmembership_attribute", PW_TYPE_STRING_PTR, offsetof(ldap_instance,groupmemb_attr), NULL, NULL},
 287         {"dictionary_mapping", PW_TYPE_STRING_PTR, offsetof(ldap_instance,dictionary_mapping), NULL, "${confdir}/ldap.attrmap"},
 288         {"ldap_debug", PW_TYPE_INTEGER, offsetof(ldap_instance,ldap_debug), NULL, "0x0000"},
 289         {"ldap_connections_number", PW_TYPE_INTEGER, offsetof(ldap_instance,num_conns), NULL, "5"},
 290         {"compare_check_items", PW_TYPE_BOOLEAN, offsetof(ldap_instance,do_comp), NULL, "no"},
 291         {"access_attr_used_for_allow", PW_TYPE_BOOLEAN, offsetof(ldap_instance,default_allow), NULL, "yes"},
 292
 293         {NULL, -1, 0, NULL, NULL}
 294 };
 295
 296 #define ld_valid                ld_options.ldo_valid
 297 #define LDAP_VALID_SESSION      0x2
 298 #define LDAP_VALID(ld)  ( (ld)->ld_valid == LDAP_VALID_SESSION )
 299
 300 #ifdef FIELDCPY
 301 static void     fieldcpy(char *, char **);
 302 #endif
 303 static VALUE_PAIR *ldap_pairget(LDAP *, LDAPMessage *, TLDAP_RADIUS *,VALUE_PAIR **,char);
 304 static int ldap_groupcmp(void *, REQUEST *, VALUE_PAIR *, VALUE_PAIR *, VALUE_PAIR *, VALUE_PAIR **);
 305 static int ldap_xlat(void *,REQUEST *, char *, char *,int, RADIUS_ESCAPE_STRING);
 306 static LDAP    *ldap_connect(void *instance, const char *, const char *, int, int *);
 307 static int     read_mappings(ldap_instance* inst);
 308
 309 static inline int ldap_get_conn(LDAP_CONN *conns,LDAP_CONN **ret,void *instance)
 310 {
 311         ldap_instance *inst = instance;
 312         register int i = 0;
 313
 314         for(;i<inst->num_conns;i++){
 315                 if (conns[i].locked == 0 && pthread_mutex_trylock(&(conns[i].mutex)) == 0){
 316                         *ret = &conns[i];
 317                         conns[i].locked = 1;
 318                         DEBUG("ldap_get_conn: Got Id: %d",i);
 319                         return i;
 320                 }
 321         }
 322
 323         return -1;
 324 }
 325
 326 static inline void ldap_release_conn(int i, LDAP_CONN *conns)
 327 {
 328         DEBUG("ldap_release_conn: Release Id: %d",i);
 329         conns[i].locked = 0;
 330         pthread_mutex_unlock(&(conns[i].mutex));
 331 }
 332
 333 /*************************************************************************
 334  *
 335  *      Function: rlm_ldap_instantiate
 336  *
 337  *      Purpose: Uses section of radiusd config file passed as parameter
 338  *               to create an instance of the module.
 339  *
 340  *************************************************************************/
 341 static int
 342 ldap_instantiate(CONF_SECTION * conf, void **instance)
 343 {
 344         ldap_instance  *inst;
 345         int i = 0;
 346         int atts_num = 0;
 347         int reply_map_num = 0;
 348         int check_map_num = 0;
 349         int att_map[3] = {0,0,0};
 350         TLDAP_RADIUS *pair;
 351         char *xlat_name;
 352
 353         inst = rad_malloc(sizeof *inst);
 354         if (!inst) {
 355                 return -1;
 356         }
 357         memset(inst, 0, sizeof(*inst));
 358
 359         if (cf_section_parse(conf, inst, module_config) < 0) {
 360                 free(inst);
 361                 return -1;
 362         }
 363
 364         if (inst->server == NULL) {
 365                 radlog(L_ERR, "rlm_ldap: missing 'server' directive.");
 366                 free(inst);
 367                 return -1;
 368         }
 369         inst->is_url = 0;
 370 #ifdef HAVE_LDAP_INITIALIZE
 371         if (ldap_is_ldap_url(inst->server)){
 372                 inst->is_url = 1;
 373                 inst->port = 0;
 374         }
 375 #endif
 376
 377         inst->timeout.tv_usec = 0;
 378         inst->net_timeout.tv_usec = 0;
 379         /* workaround for servers which support LDAPS but not START TLS */
 380         if(inst->port == LDAPS_PORT)
 381                 inst->tls_mode = LDAP_OPT_X_TLS_HARD;
 382         else
 383                 inst->tls_mode = 0;
 384         inst->reply_item_map = NULL;
 385         inst->check_item_map = NULL;
 386         inst->conns = NULL;
 387         inst->failed_conns = 0;
 388
 389         paircompare_register(PW_LDAP_GROUP, PW_USER_NAME, ldap_groupcmp, inst);
 390         DEBUG("conns: %p",inst->conns);
 391
 392         xlat_name = cf_section_name2(conf);
 393         if (xlat_name == NULL) {
 394                 xlat_name = cf_section_name1(conf);
 395                 rad_assert(xlat_name != NULL); /* or all hell breaks loose */
 396         }
 397         inst->xlat_name = strdup(xlat_name);
 398         xlat_register(xlat_name,ldap_xlat,inst);
 399
 400         if (inst->num_conns <= 0){
 401                 radlog(L_ERR, "rlm_ldap: Invalid ldap connections number passed.");
 402                 free(inst);
 403                 return -1;
 404         }
 405         inst->conns = (LDAP_CONN *)malloc(sizeof(LDAP_CONN)*inst->num_conns);
 406         if (inst->conns == NULL){
 407                 radlog(L_ERR, "rlm_ldap: Could not allocate memory. Aborting.");
 408                 free(inst);
 409                 return -1;
 410         }
 411         for(;i<inst->num_conns;i++){
 412                 inst->conns[i].bound = 0;
 413                 inst->conns[i].locked = 0;
 414                 inst->conns[i].failed_conns = 0;
 415                 inst->conns[i].ld = NULL;
 416                 pthread_mutex_init(&inst->conns[i].mutex, NULL);
 417         }
 418
 419         if (read_mappings(inst) != 0) {
 420                 radlog(L_ERR, "rlm_ldap: Reading dictionary mappings from file %s failed",
 421                        inst->dictionary_mapping);
 422                 radlog(L_ERR, "rlm_ldap: Proceeding with no mappings");
 423         }
 424
 425         pair = inst->check_item_map;
 426         while(pair != NULL){
 427                 atts_num++;
 428                 pair = pair->next;
 429         }
 430         check_map_num = (atts_num - 1);
 431         pair = inst->reply_item_map;
 432         while(pair != NULL){
 433                 atts_num++;
 434                 pair = pair->next;
 435         }
 436         reply_map_num = (atts_num - 1);
 437         if (inst->profile_attr)
 438                 atts_num++;
 439         if (inst->passwd_attr)
 440                 atts_num++;
 441         if (inst->access_attr)
 442                 atts_num++;
 443         inst->atts = (char **)malloc(sizeof(char *)*(atts_num + 1));
 444         if (inst->atts == NULL){
 445                 radlog(L_ERR, "rlm_ldap: Could not allocate memory. Aborting.");
 446                 free(inst);
 447                 return -1;
 448         }
 449         pair = inst->check_item_map;
 450         for(i=0;i<atts_num;i++){
 451                 if (i <= check_map_num ){
 452                         inst->atts[i] = pair->attr;
 453                         if (i == check_map_num)
 454                                 pair = inst->reply_item_map;
 455                         else
 456                                 pair = pair->next;
 457                 }
 458                 else if (i <= reply_map_num){
 459                         inst->atts[i] = pair->attr;
 460                         pair = pair->next;
 461                 }
 462                 else{
 463                         if (inst->profile_attr && !att_map[0]){
 464                                 inst->atts[i] = inst->profile_attr;
 465                                 att_map[0] = 1;
 466                         }
 467                         else if (inst->passwd_attr && !att_map[1]){
 468                                 inst->atts[i] = inst->passwd_attr;
 469                                 att_map[1] = 1;
 470                         }
 471                         else if (inst->access_attr && !att_map[2]){
 472                                 inst->atts[i] = inst->access_attr;
 473                                 att_map[2] = 1;
 474                         }
 475                 }
 476         }
 477         inst->atts[atts_num] = NULL;
 478
 479         DEBUG("conns: %p",inst->conns);
 480
 481         *instance = inst;
 482
 483
 484         return 0;
 485 }
 486
 487
 488 /*
 489  * read_mappings(...) reads a ldap<->radius mappings file to inst->reply_item_map and inst->check_item_map
 490  */
 491
 492 #define MAX_LINE_LEN 160
 493 #define GENERIC_ATTRIBUTE_ID "$GENERIC$"
 494
 495 static int
 496 read_mappings(ldap_instance* inst)
 497 {
 498         FILE* mapfile;
 499         char *filename;
 500         /* all buffers are of MAX_LINE_LEN so we can use sscanf without being afraid of buffer overflows */
 501         char buf[MAX_LINE_LEN], itemType[MAX_LINE_LEN], radiusAttribute[MAX_LINE_LEN], ldapAttribute[MAX_LINE_LEN];
 502         int linenumber;
 503
 504         /* open the mappings file for reading */
 505
 506         filename = inst->dictionary_mapping;
 507         DEBUG("rlm_ldap: reading ldap<->radius mappings from file %s", filename);
 508         mapfile = fopen(filename, "r");
 509
 510         if (mapfile == NULL) {
 511                 radlog(L_ERR, "rlm_ldap: Opening file %s failed", filename);
 512                 return -1; /* error */
 513         }
 514
 515         /* read file line by line. Note that if line length exceed MAX_LINE_LEN, line numbers will be mixed up */
 516
 517         linenumber = 0;
 518
 519         while (fgets(buf, sizeof buf, mapfile)!=NULL) {
 520                 char* ptr;
 521                 int token_count;
 522                 TLDAP_RADIUS* pair;
 523
 524                 linenumber++;
 525
 526                 /* strip comments */
 527                 ptr = strchr(buf, '#');
 528                 if (ptr) *ptr = 0;
 529
 530                 /* empty line */
 531                 if (buf[0] == 0) continue;
 532
 533                 /* extract tokens from the string */
 534                 token_count = sscanf(buf, "%s %s %s", itemType, radiusAttribute, ldapAttribute);
 535
 536                 if (token_count <= 0) /* no tokens */
 537                         continue;
 538
 539                 if (token_count != 3) {
 540                         radlog(L_ERR, "rlm_ldap: Skipping %s line %i: %s", filename, linenumber, buf);
 541                         radlog(L_ERR, "rlm_ldap: Expected 3 tokens "
 542                                "(Item type, RADIUS Attribute and LDAP Attribute) but found only %i", token_count);
 543                         continue;
 544                 }
 545
 546                 /* create new TLDAP_RADIUS list node */
 547                 pair = rad_malloc(sizeof(TLDAP_RADIUS));
 548
 549                 pair->attr = strdup(ldapAttribute);
 550                 pair->radius_attr = strdup(radiusAttribute);
 551
 552                 if ( (pair->attr == NULL) || (pair->radius_attr == NULL) ) {
 553                         radlog(L_ERR, "rlm_ldap: Out of memory");
 554                         if (pair->attr) free(pair->attr);
 555                         if (pair->radius_attr) free(pair->radius_attr);
 556                         free(pair);
 557                         fclose(mapfile);
 558                         return -1;
 559                 }
 560
 561                 /* push node to correct list */
 562                 if (strcasecmp(itemType, "checkItem") == 0) {
 563                         pair->next = inst->check_item_map;
 564                         inst->check_item_map = pair;
 565                 } else if (strcasecmp(itemType, "replyItem") == 0) {
 566                         pair->next = inst->reply_item_map;
 567                         inst->reply_item_map = pair;
 568                 } else {
 569                         radlog(L_ERR, "rlm_ldap: file %s: skipping line %i: unknown itemType %s",
 570                                filename, linenumber, itemType);
 571                         free(pair->attr);
 572                         free(pair->radius_attr);
 573                         free(pair);
 574                         continue;
 575                 }
 576
 577                 DEBUG("rlm_ldap: LDAP %s mapped to RADIUS %s",
 578                       pair->attr, pair->radius_attr);
 579         }
 580
 581         fclose(mapfile);
 582
 583         return 0; /* success */
 584 }
 585
 586 static int
 587 perform_search(void *instance, LDAP_CONN *conn, char *search_basedn, int scope, char *filter,
 588                 char **attrs, LDAPMessage ** result)
 589 {
 590         int             res = RLM_MODULE_OK;
 591         int             ldap_errno = 0;
 592         ldap_instance  *inst = instance;
 593         int             search_retry = 0;
 594
 595         *result = NULL;
 596
 597         if (!conn){
 598                 radlog(L_ERR, "rlm_ldap: NULL connection handle passed");
 599                 return RLM_MODULE_FAIL;
 600         }
 601         if (conn->failed_conns > MAX_FAILED_CONNS_START){
 602                 conn->failed_conns++;
 603                 if (conn->failed_conns >= MAX_FAILED_CONNS_END){
 604                         conn->failed_conns = MAX_FAILED_CONNS_RESTART;
 605                         conn->bound = 0;
 606                 }
 607         }
 608 retry:
 609         if (!conn->bound || conn->ld == NULL) {
 610                 DEBUG2("rlm_ldap: attempting LDAP reconnection");
 611                 if (conn->ld){
 612                         DEBUG2("rlm_ldap: closing existing LDAP connection");
 613                         ldap_unbind_s(conn->ld);
 614                 }
 615                 if ((conn->ld = ldap_connect(instance, inst->login, inst->password, 0, &res)) == NULL) {
 616                         radlog(L_ERR, "rlm_ldap: (re)connection attempt failed");
 617                         if (search_retry == 0)
 618                                 conn->failed_conns++;
 619                         return (RLM_MODULE_FAIL);
 620                 }
 621                 conn->bound = 1;
 622                 conn->failed_conns = 0;
 623         }
 624         DEBUG2("rlm_ldap: performing search in %s, with filter %s", search_basedn ? search_basedn : "(null)" , filter);
 625         switch (ldap_search_st(conn->ld, search_basedn, scope, filter, attrs, 0, &(inst->timeout), result)) {
 626         case LDAP_SUCCESS:
 627         case LDAP_NO_SUCH_OBJECT:
 628                 break;
 629         case LDAP_SERVER_DOWN:
 630                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: LDAP connection lost.");
 631                 conn->failed_conns++;
 632                 if (search_retry == 0){
 633                         if (conn->failed_conns <= MAX_FAILED_CONNS_START){
 634                                 radlog(L_INFO, "rlm_ldap: Attempting reconnect");
 635                                 search_retry = 1;
 636                                 conn->bound = 0;
 637                                 ldap_msgfree(*result);
 638                                 goto retry;
 639                         }
 640                 }
 641                 ldap_msgfree(*result);
 642                 return RLM_MODULE_FAIL;
 643         case LDAP_INSUFFICIENT_ACCESS:
 644                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: Insufficient access. Check the identity and password configuration directives.");
 645                 ldap_msgfree(*result);
 646                 return RLM_MODULE_FAIL;
 647         case LDAP_TIMEOUT:
 648                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: Timed out while waiting for server to respond. Please increase the timeout.");
 649                 ldap_msgfree(*result);
 650                 return RLM_MODULE_FAIL;
 651         case LDAP_FILTER_ERROR:
 652                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: Bad search filter: %s",filter);
 653                 ldap_msgfree(*result);
 654                 return RLM_MODULE_FAIL;
 655         case LDAP_TIMELIMIT_EXCEEDED:
 656         case LDAP_BUSY:
 657         case LDAP_UNAVAILABLE:
 658                 /* We don't need to reconnect in these cases so we don't set conn->bound */
 659                 ldap_get_option(conn->ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
 660                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: %s", ldap_err2string(ldap_errno));
 661                 ldap_msgfree(*result);
 662                 return (RLM_MODULE_FAIL);
 663         default:
 664                 ldap_get_option(conn->ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
 665                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: %s", ldap_err2string(ldap_errno));
 666                 conn->bound = 0;
 667                 ldap_msgfree(*result);
 668                 return (RLM_MODULE_FAIL);
 669         }
 670
 671         if ((ldap_count_entries(conn->ld, *result)) != 1) {
 672                 DEBUG("rlm_ldap: object not found or got ambiguous search result");
 673                 res = RLM_MODULE_NOTFOUND;
 674                 ldap_msgfree(*result);
 675         }
 676         return res;
 677 }
 678
 679
 680 /*
 681  *      Translate the LDAP queries.
 682  */
 683 static int ldap_escape_func(char *out, int outlen, const char *in)
 684 {
 685         int len = 0;
 686
 687         while (in[0]) {
 688                 /*
 689                  *  Only one byte left.
 690                  */
 691                 if (outlen <= 1) {
 692                         break;
 693                 }
 694
 695                 if (strchr("*", *in)) {
 696                         in++;
 697                         outlen--;
 698                         continue;
 699                 }
 700
 701                 /*
 702                  *      Else it's a nice character.
 703                  */
 704                 *out = *in;
 705                 out++;
 706                 in++;
 707                 outlen--;
 708                 len++;
 709         }
 710         *out = '\0';
 711         return len;
 712 }
 713
 714 /*
 715  * ldap_groupcmp(). Implement the Ldap-Group == "group" filter
 716  */
 717
 718 static int ldap_groupcmp(void *instance, REQUEST *req, VALUE_PAIR *request, VALUE_PAIR *check,
 719                 VALUE_PAIR *check_pairs, VALUE_PAIR **reply_pairs)
 720 {
 721         char            filter[MAX_FILTER_STR_LEN];
 722         char            gr_filter[MAX_FILTER_STR_LEN];
 723         int             res;
 724         LDAPMessage     *result = NULL;
 725         LDAPMessage     *msg = NULL;
 726         char            basedn[MAX_FILTER_STR_LEN];
 727         char            *attrs[] = {"dn",NULL};
 728         char            **vals;
 729         ldap_instance   *inst = instance;
 730         char            *group_attrs[] = {inst->groupmemb_attr,NULL};
 731         LDAP_CONN       *conn;
 732         int             conn_id = -1;
 733         VALUE_PAIR      *vp_user_dn;
 734         VALUE_PAIR      **request_pairs;
 735
 736         request_pairs = &req->packet->vps;
 737
 738         DEBUG("rlm_ldap: Entering ldap_groupcmp()");
 739
 740         if (check->strvalue == NULL || check->length == 0){
 741                 DEBUG("rlm_ldap::ldap_groupcmp: Illegal group name");
 742                 return 1;
 743         }
 744
 745         if (req == NULL){
 746                 DEBUG("rlm_ldap::ldap_groupcmp: NULL request");
 747                 return 1;
 748         }
 749
 750         if (!radius_xlat(basedn, sizeof(basedn), inst->basedn, req, NULL)) {
 751                 DEBUG("rlm_ldap::ldap_groupcmp: unable to create basedn.");
 752                 return 1;
 753         }
 754
 755         while((vp_user_dn = pairfind(*request_pairs, PW_LDAP_USERDN)) == NULL){
 756                 char            *user_dn = NULL;
 757
 758                 if (!radius_xlat(filter, sizeof(filter), inst->filter,
 759                                         req, ldap_escape_func)){
 760                         DEBUG("rlm_ldap::ldap_groupcmp: unable to create filter");
 761                         return 1;
 762                 }
 763                 if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
 764                         radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
 765                         return 1;
 766                 }
 767                 if ((res = perform_search(inst, conn, basedn, LDAP_SCOPE_SUBTREE,
 768                                         filter, attrs, &result)) != RLM_MODULE_OK){
 769                         DEBUG("rlm_ldap::ldap_groupcmp: search failed");
 770                         ldap_release_conn(conn_id,inst->conns);
 771                         return 1;
 772                 }
 773                 if ((msg = ldap_first_entry(conn->ld, result)) == NULL) {
 774                         DEBUG("rlm_ldap::ldap_groupcmp: ldap_first_entry() failed");
 775                         ldap_release_conn(conn_id,inst->conns);
 776                         ldap_msgfree(result);
 777                         return 1;
 778                 }
 779                 if ((user_dn = ldap_get_dn(conn->ld, msg)) == NULL) {
 780                         DEBUG("rlm_ldap:ldap_groupcmp:: ldap_get_dn() failed");
 781                         ldap_release_conn(conn_id,inst->conns);
 782                         ldap_msgfree(result);
 783                         return 1;
 784                 }
 785                 ldap_release_conn(conn_id,inst->conns);
 786                 /*
 787                 * Adding new attribute containing DN for LDAP object associated with
 788                 * given username
 789                 */
 790                 pairadd(request_pairs, pairmake("Ldap-UserDn", user_dn, T_OP_EQ));
 791                 ldap_memfree(user_dn);
 792                 ldap_msgfree(result);
 793         }
 794
 795         if(!radius_xlat(gr_filter, sizeof(gr_filter), inst->groupmemb_filt, req, NULL)){
 796                 DEBUG("rlm_ldap::ldap_groupcmp: unable to create filter.");
 797                 return 1;
 798         }
 799
 800         if (strchr((char *)check->strvalue,',') != NULL) {
 801                 /* This looks like a DN */
 802                 snprintf(filter,sizeof(filter), "%s",gr_filter);
 803                 snprintf(basedn,sizeof(basedn), "%s",(char *)check->strvalue);
 804         } else
 805                 snprintf(filter,sizeof(filter), "(&(%s=%s)%s)",inst->groupname_attr,(char *)check->strvalue,gr_filter);
 806
 807         if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
 808                 radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
 809                 return 1;
 810         }
 811
 812         if ((res = perform_search(inst, conn, basedn, LDAP_SCOPE_SUBTREE,
 813                                 filter, attrs, &result)) == RLM_MODULE_OK){
 814                 DEBUG("rlm_ldap::ldap_groupcmp: User found in group %s",
 815                                 (char *)check->strvalue);
 816                 ldap_msgfree(result);
 817                 ldap_release_conn(conn_id,inst->conns);
 818                 return 0;
 819         }
 820
 821         ldap_release_conn(conn_id,inst->conns);
 822
 823         if (res != RLM_MODULE_NOTFOUND ) {
 824                 DEBUG("rlm_ldap::ldap_groupcmp: Search returned error");
 825                 return 1;
 826         }
 827
 828         if (inst->groupmemb_attr == NULL){
 829                 /* search returned NOTFOUND and searching for membership
 830                  * using user object attributes is not specified in config
 831                  * file
 832                  */
 833                 DEBUG("rlm_ldap::ldap_groupcmp: Group %s not found or user is not a member.",(char *)check->strvalue);
 834                 return 1;
 835         }
 836
 837         snprintf(filter,sizeof(filter), "(objectclass=*)");
 838         if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
 839                 radlog(L_ERR, "rlm_ldap: Add ldap connections are in use");
 840                 return 1;
 841         }
 842         if ((res = perform_search(inst, conn, vp_user_dn->strvalue, LDAP_SCOPE_BASE,
 843                                         filter, group_attrs,&result)) != RLM_MODULE_OK){
 844                 DEBUG("rlm_ldap::ldap_groupcmp: Search returned error");
 845                 ldap_release_conn(conn_id, inst->conns);
 846                 return 1;
 847         }
 848
 849         if ((msg = ldap_first_entry(conn->ld, result)) == NULL) {
 850                 DEBUG("rlm_ldap::ldap_groupcmp: ldap_first_entry() failed");
 851                 ldap_release_conn(conn_id,inst->conns);
 852                 ldap_msgfree(result);
 853                 return 1;
 854         }
 855         if ((vals = ldap_get_values(conn->ld, msg, inst->groupmemb_attr)) != NULL) {
 856                 unsigned int i = 0;
 857                 char found = 0;
 858                 for (;i < ldap_count_values(vals);i++){
 859                         if (strchr(vals[i],',') != NULL){
 860                                 /* This looks like a DN */
 861                                 LDAPMessage *gr_result = NULL;
 862                                 snprintf(filter,sizeof(filter), "(%s=%s)",
 863                                         inst->groupname_attr,
 864                                         (char *)check->strvalue);
 865                                 if ((res = perform_search(inst, conn, vals[i],
 866                                                 LDAP_SCOPE_BASE, filter,
 867                                                 attrs, &gr_result)) != RLM_MODULE_OK){
 868                                         if (res != RLM_MODULE_NOTFOUND){
 869                                                 DEBUG("rlm_ldap::ldap_groupcmp: \
 870                                                         Search returned error");
 871                                                 ldap_value_free(vals);
 872                                                 ldap_msgfree(result);
 873                                                 ldap_release_conn(conn_id,inst->conns);
 874                                                 return 1;
 875                                         }
 876                                 } else {
 877                                         ldap_msgfree(gr_result);
 878                                         found = 1;
 879                                         break;
 880                                 }
 881                         } else {
 882                                 if (strcmp(vals[i],(char *)check->strvalue) == 0){
 883                                         found = 1;
 884                                         break;
 885                                 }
 886                         }
 887                 }
 888                 ldap_value_free(vals);
 889                 ldap_msgfree(result);
 890                 if (found == 0){
 891                         DEBUG("rlm_ldap::groupcmp: Group %s not found \
 892                                 or user not a member",
 893                                 (char *)check->strvalue);
 894                         ldap_release_conn(conn_id,inst->conns);
 895                         return 1;
 896                 }
 897         } else {
 898                         DEBUG("rlm_ldap::ldap_groupcmp: ldap_get_values() failed");
 899                         ldap_msgfree(result);
 900                         ldap_release_conn(conn_id,inst->conns);
 901                         return 1;
 902         }
 903
 904         DEBUG("rlm_ldap::ldap_groupcmp: User found in group %s",(char *)check->strvalue);
 905         ldap_release_conn(conn_id,inst->conns);
 906
 907         return 0;
 908 }
 909
 910 /*
 911  * ldap_xlat()
 912  * Do an xlat on an LDAP URL
 913  */
 914
 915 static int ldap_xlat(void *instance, REQUEST *request, char *fmt, char *out, int freespace,
 916                                 RADIUS_ESCAPE_STRING func)
 917 {
 918         char url[MAX_FILTER_STR_LEN];
 919         int res;
 920         int ret = 0;
 921         ldap_instance *inst = instance;
 922         LDAPURLDesc *ldap_url;
 923         LDAPMessage *result = NULL;
 924         LDAPMessage *msg = NULL;
 925         char **vals;
 926         int conn_id = -1;
 927         LDAP_CONN *conn;
 928
 929         DEBUG("rlm_ldap: - ldap_xlat");
 930         if (!radius_xlat(url, sizeof(url), fmt, request, func)) {
 931                 radlog (L_ERR, "rlm_ldap: Unable to create LDAP URL.\n");
 932                 return 0;
 933         }
 934         if (!ldap_is_ldap_url(url)){
 935                 radlog (L_ERR, "rlm_ldap: String passed does not look like an LDAP URL.\n");
 936                 return 0;
 937         }
 938         if (ldap_url_parse(url,&ldap_url)){
 939                 radlog (L_ERR, "rlm_ldap: LDAP URL parse failed.\n");
 940                 return 0;
 941         }
 942         if (ldap_url->lud_attrs == NULL || ldap_url->lud_attrs[0] == NULL || \
 943                 ( ldap_url->lud_attrs[1] != NULL || ( ! strlen(ldap_url->lud_attrs[0]) || \
 944                 ! strcmp(ldap_url->lud_attrs[0],"*") ) ) ){
 945                 radlog (L_ERR, "rlm_ldap: Invalid Attribute(s) request.\n");
 946                 ldap_free_urldesc(ldap_url);
 947                 return 0;
 948         }
 949         if (ldap_url->lud_host){
 950                 if (strncmp(inst->server,ldap_url->lud_host,strlen(inst->server)) != 0 || \
 951                                 ldap_url->lud_port != inst->port){
 952                         DEBUG("rlm_ldap: Requested server/port is not known to this module instance.");
 953                         ldap_free_urldesc(ldap_url);
 954                         return 0;
 955                 }
 956         }
 957         if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
 958                 radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
 959                 ldap_free_urldesc(ldap_url);
 960                 return 0;
 961         }
 962         if ((res = perform_search(inst, conn, ldap_url->lud_dn, ldap_url->lud_scope, ldap_url->lud_filter, ldap_url->lud_attrs, &result)) != RLM_MODULE_OK){
 963                 if (res == RLM_MODULE_NOTFOUND){
 964                         DEBUG("rlm_ldap: Search returned not found");
 965                         ldap_free_urldesc(ldap_url);
 966                         ldap_release_conn(conn_id,inst->conns);
 967                         return 0;
 968                 }
 969                 DEBUG("rlm_ldap: Search returned error");
 970                 ldap_free_urldesc(ldap_url);
 971                 ldap_release_conn(conn_id,inst->conns);
 972                 return 0;
 973         }
 974         if ((msg = ldap_first_entry(conn->ld, result)) == NULL){
 975                 DEBUG("rlm_ldap: ldap_first_entry() failed");
 976                 ldap_msgfree(result);
 977                 ldap_free_urldesc(ldap_url);
 978                 ldap_release_conn(conn_id,inst->conns);
 979                 return 0;
 980         }
 981         if ((vals = ldap_get_values(conn->ld, msg, ldap_url->lud_attrs[0])) != NULL) {
 982                 ret = strlen(vals[0]);
 983                 if (ret > freespace){
 984                         DEBUG("rlm_ldap: Insufficient string space");
 985                         ldap_free_urldesc(ldap_url);
 986                         ldap_value_free(vals);
 987                         ldap_msgfree(result);
 988                         ldap_release_conn(conn_id,inst->conns);
 989                         return 0;
 990                 }
 991                 DEBUG("rlm_ldap: Adding attribute %s, value: %s",ldap_url->lud_attrs[0],vals[0]);
 992                 strncpy(out,vals[0],ret);
 993                 ldap_value_free(vals);
 994         }
 995         else
 996                 ret = 0;
 997
 998         ldap_msgfree(result);
 999         ldap_free_urldesc(ldap_url);
1000         ldap_release_conn(conn_id,inst->conns);
1001
1002         DEBUG("rlm_ldap: - ldap_xlat end");
1003
1004         return ret;
1005 }
1006
1007
1008 /******************************************************************************
1009  *
1010  *      Function: rlm_ldap_authorize
1011  *
1012  *      Purpose: Check if user is authorized for remote access
1013  *
1014  ******************************************************************************/
1015 static int
1016 ldap_authorize(void *instance, REQUEST * request)
1017 {
1018         LDAPMessage     *result = NULL;
1019         LDAPMessage     *msg = NULL;
1020         LDAPMessage     *def_msg = NULL;
1021         LDAPMessage     *def_attr_msg = NULL;
1022         LDAPMessage     *def_result = NULL;
1023         LDAPMessage     *def_attr_result = NULL;
1024         ldap_instance   *inst = instance;
1025         char            *user_dn = NULL;
1026         char            filter[MAX_FILTER_STR_LEN];
1027         char            basedn[MAX_FILTER_STR_LEN];
1028         VALUE_PAIR      *check_tmp;
1029         VALUE_PAIR      *reply_tmp;
1030         int             res;
1031         VALUE_PAIR      **check_pairs, **reply_pairs;
1032         char            **vals;
1033         VALUE_PAIR      *module_fmsg_vp;
1034         VALUE_PAIR      *user_profile;
1035         char            module_fmsg[MAX_STRING_LEN];
1036         LDAP_CONN       *conn;
1037         int             conn_id = -1;
1038
1039         DEBUG("rlm_ldap: - authorize");
1040
1041         if (!request->username){
1042                 radlog(L_AUTH, "rlm_ldap: Attribute \"User-Name\" is required for authentication.\n");
1043                 return RLM_MODULE_INVALID;
1044         }
1045
1046         check_pairs = &request->config_items;
1047         reply_pairs = &request->reply->vps;
1048
1049         /*
1050          * Check for valid input, zero length names not permitted
1051          */
1052         if (request->username->strvalue == 0) {
1053                 radlog(L_ERR, "rlm_ldap: zero length username not permitted\n");
1054                 return RLM_MODULE_INVALID;
1055         }
1056         DEBUG("rlm_ldap: performing user authorization for %s",
1057                request->username->strvalue);
1058
1059         if (!radius_xlat(filter, sizeof(filter), inst->filter,
1060                          request, ldap_escape_func)) {
1061                 radlog (L_ERR, "rlm_ldap: unable to create filter.\n");
1062                 return RLM_MODULE_INVALID;
1063         }
1064
1065         if (!radius_xlat(basedn, sizeof(basedn), inst->basedn,
1066                          request, NULL)) {
1067                 radlog (L_ERR, "rlm_ldap: unable to create basedn.\n");
1068                 return RLM_MODULE_INVALID;
1069         }
1070
1071         if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
1072                 radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
1073                 return RLM_MODULE_FAIL;
1074         }
1075         if ((res = perform_search(instance, conn, basedn, LDAP_SCOPE_SUBTREE, filter, inst->atts, &result)) != RLM_MODULE_OK) {
1076                 DEBUG("rlm_ldap: search failed");
1077                 if (res == RLM_MODULE_NOTFOUND){
1078                         snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: User not found");
1079                         module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1080                         pairadd(&request->packet->vps, module_fmsg_vp);
1081                 }
1082                 ldap_release_conn(conn_id,inst->conns);
1083                 return (res);
1084         }
1085         if ((msg = ldap_first_entry(conn->ld, result)) == NULL) {
1086                 DEBUG("rlm_ldap: ldap_first_entry() failed");
1087                 ldap_msgfree(result);
1088                 ldap_release_conn(conn_id,inst->conns);
1089                 return RLM_MODULE_FAIL;
1090         }
1091         if ((user_dn = ldap_get_dn(conn->ld, msg)) == NULL) {
1092                 DEBUG("rlm_ldap: ldap_get_dn() failed");
1093                 ldap_msgfree(result);
1094                 ldap_release_conn(conn_id,inst->conns);
1095                 return RLM_MODULE_FAIL;
1096         }
1097         /*
1098          * Adding new attribute containing DN for LDAP object associated with
1099          * given username
1100          */
1101         pairadd(&request->packet->vps, pairmake("Ldap-UserDn", user_dn, T_OP_EQ));
1102         ldap_memfree(user_dn);
1103
1104
1105         /* Remote access is controled by attribute of the user object */
1106         if (inst->access_attr) {
1107                 if ((vals = ldap_get_values(conn->ld, msg, inst->access_attr)) != NULL) {
1108                         if (inst->default_allow){
1109                                 DEBUG("rlm_ldap: checking if remote access for %s is allowed by %s", request->username->strvalue, inst->access_attr);
1110                                 if (!strncmp(vals[0], "FALSE", 5)) {
1111                                         DEBUG("rlm_ldap: dialup access disabled");
1112                                         snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Access Attribute denies access");
1113                                         module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1114                                         pairadd(&request->packet->vps, module_fmsg_vp);
1115                                         ldap_msgfree(result);
1116                                         ldap_value_free(vals);
1117                                         ldap_release_conn(conn_id,inst->conns);
1118                                         return RLM_MODULE_USERLOCK;
1119                                 }
1120                                 ldap_value_free(vals);
1121                         }
1122                         else{
1123                                 DEBUG("rlm_ldap: %s attribute exists - access denied by default", inst->access_attr);
1124                                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Access Attribute denies access");
1125                                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1126                                 pairadd(&request->packet->vps, module_fmsg_vp);
1127                                 ldap_msgfree(result);
1128                                 ldap_value_free(vals);
1129                                 ldap_release_conn(conn_id,inst->conns);
1130                                 return RLM_MODULE_USERLOCK;
1131                         }
1132                 } else {
1133                         if (inst->default_allow){
1134                                 DEBUG("rlm_ldap: no %s attribute - access denied by default", inst->access_attr);
1135                                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Access Attribute denies access");
1136                                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1137                                 pairadd(&request->packet->vps, module_fmsg_vp);
1138                                 ldap_msgfree(result);
1139                                 ldap_release_conn(conn_id,inst->conns);
1140                                 return RLM_MODULE_USERLOCK;
1141                         }
1142                 }
1143         }
1144
1145         /*
1146          * Check for the default profile entry. If it exists then add the
1147          * attributes it contains in the check and reply pairs
1148          */
1149
1150         user_profile = pairfind(request->config_items, PW_USER_PROFILE);
1151         if (inst->default_profile || user_profile){
1152                 char *profile = inst->default_profile;
1153
1154                 strNcpy(filter,"(objectclass=radiusprofile)",sizeof(filter));
1155                 if (user_profile)
1156                         profile = user_profile->strvalue;
1157                 if (profile && strlen(profile)){
1158                         if ((res = perform_search(instance, conn,
1159                                 profile, LDAP_SCOPE_BASE,
1160                                 filter, inst->atts, &def_result)) == RLM_MODULE_OK){
1161                                 if ((def_msg = ldap_first_entry(conn->ld,def_result))){
1162                                         if ((check_tmp = ldap_pairget(conn->ld,def_msg,inst->check_item_map,check_pairs,1))) {
1163                                                 /*pairadd(check_pairs,check_tmp);*/
1164                                                 pairxlatmove(request, check_pairs, &check_tmp);
1165                                                 pairfree(&check_tmp);
1166                                         }
1167                                         if ((reply_tmp = ldap_pairget(conn->ld,def_msg,inst->reply_item_map,reply_pairs,0))) {
1168                                                 /*pairadd(reply_pairs,reply_tmp);*/
1169                                                 pairxlatmove(request, reply_pairs, &reply_tmp);
1170                                                 pairfree(&reply_tmp);
1171                                         }
1172                                 }
1173                                 ldap_msgfree(def_result);
1174                         } else
1175                                 DEBUG("rlm_ldap: default_profile/user-profile search failed");
1176                 }
1177         }
1178
1179         /*
1180          * Check for the profile attribute. If it exists, we assume that it
1181          * contains the DN of an entry containg a profile for the user. That
1182          * way we can have different general profiles for various user groups
1183          * (students,faculty,staff etc)
1184          */
1185
1186         if (inst->profile_attr){
1187                 if ((vals = ldap_get_values(conn->ld, msg, inst->profile_attr)) != NULL) {
1188                         unsigned int i=0;
1189                         strNcpy(filter,"(objectclass=radiusprofile)",sizeof(filter));
1190                         while(vals[i] != NULL && strlen(vals[i])){
1191                                 if ((res = perform_search(instance, conn,
1192                                         vals[i], LDAP_SCOPE_BASE,
1193                                         filter, inst->atts, &def_attr_result)) == RLM_MODULE_OK){
1194                                         if ((def_attr_msg = ldap_first_entry(conn->ld,def_attr_result))){
1195                                                 if ((check_tmp = ldap_pairget(conn->ld,def_attr_msg,inst->check_item_map,check_pairs,1))) {
1196                                                         /*pairadd(check_pairs,check_tmp);*/
1197                                                         pairxlatmove(request, check_pairs, &check_tmp);
1198                                                         pairfree(&check_tmp);
1199                                                 }
1200                                                 if ((reply_tmp = ldap_pairget(conn->ld,def_attr_msg,inst->reply_item_map,reply_pairs,0))) {
1201                                                         /*pairadd(reply_pairs,reply_tmp);*/
1202                                                         pairxlatmove(request, reply_pairs, &reply_tmp);
1203                                                         pairfree(&reply_tmp);
1204                                                 }
1205                                         }
1206                                         ldap_msgfree(def_attr_result);
1207                                 } else
1208                                         DEBUG("rlm_ldap: profile_attribute search failed");
1209                                 i++;
1210                         }
1211                         ldap_value_free(vals);
1212                 }
1213         }
1214         if (inst->passwd_attr && strlen(inst->passwd_attr)){
1215                 VALUE_PAIR *passwd_item;
1216
1217                 if ((passwd_item = pairfind(request->config_items, PW_PASSWORD)) == NULL){
1218                         char **passwd_vals;
1219                         char *passwd_val = NULL;
1220                         int passwd_len;
1221
1222                         if ((passwd_vals = ldap_get_values(conn->ld,msg,inst->passwd_attr)) != NULL){
1223                                 unsigned int i=0;
1224                                 while(passwd_vals[i] != NULL){
1225                                         if (strlen(passwd_vals[i])){
1226                                                 passwd_val = passwd_vals[i];
1227
1228                                                 if (inst->passwd_hdr && strlen(inst->passwd_hdr)){
1229                                                         passwd_val = strstr(passwd_val,inst->passwd_hdr);
1230                                                         if (passwd_val != NULL)
1231                                                                 passwd_val += strlen(inst->passwd_hdr);
1232                                                         else
1233                                                                 DEBUG("rlm_ldap: Password header not found in password %s for user %s", passwd_vals[0],request->username->strvalue);
1234                                                 }
1235                                                 if (passwd_val){
1236                                                         if ((passwd_item = paircreate(PW_PASSWORD,PW_TYPE_STRING)) == NULL){
1237                                                                 radlog(L_ERR|L_CONS, "no memory");
1238                                                                 ldap_value_free(passwd_vals);
1239                                                                 ldap_msgfree(result);
1240                                                                 ldap_release_conn(conn_id,inst->conns);
1241                                                                 return RLM_MODULE_FAIL;
1242                                                         }
1243                                                         passwd_len = strlen(passwd_val);
1244                                                         strncpy(passwd_item->strvalue,passwd_val,MAX_STRING_LEN - 1);
1245                                                         passwd_item->length = (passwd_len > (MAX_STRING_LEN - 1)) ? (MAX_STRING_LEN - 1) : passwd_len;
1246                                                         pairadd(&request->config_items,passwd_item);
1247                                                         DEBUG("rlm_ldap: Added password %s in check items",passwd_item->strvalue);
1248                                                 }
1249                                         }
1250                                         i++;
1251                                 }
1252                                 ldap_value_free(passwd_vals);
1253                         }
1254                 }
1255         }
1256
1257
1258
1259         DEBUG("rlm_ldap: looking for check items in directory...");
1260
1261         if ((check_tmp = ldap_pairget(conn->ld, msg, inst->check_item_map,check_pairs,1)) != NULL) {
1262                 /*pairadd(check_pairs,check_tmp);*/
1263                 pairxlatmove(request, check_pairs, &check_tmp);
1264                 pairfree(&check_tmp);
1265         }
1266
1267
1268         DEBUG("rlm_ldap: looking for reply items in directory...");
1269
1270
1271         if ((reply_tmp = ldap_pairget(conn->ld, msg, inst->reply_item_map,reply_pairs,0)) != NULL) {
1272                 /*pairadd(reply_pairs,reply_tmp);*/
1273                 pairxlatmove(request, reply_pairs, &reply_tmp);
1274                 pairfree(&reply_tmp);
1275         }
1276
1277        if (inst->do_comp && paircmp(request,request->packet->vps,*check_pairs,reply_pairs) != 0){
1278                 DEBUG("rlm_ldap: Pairs do not match. Rejecting user.");
1279                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Pairs do not match");
1280                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1281                 pairadd(&request->packet->vps, module_fmsg_vp);
1282                 ldap_msgfree(result);
1283                 ldap_release_conn(conn_id,inst->conns);
1284
1285                 return RLM_MODULE_REJECT;
1286         }
1287
1288         /*
1289          * Module should default to LDAP authentication if no Auth-Type
1290          * specified
1291          */
1292         if (pairfind(*check_pairs, PW_AUTHTYPE) == NULL)
1293                 pairadd(check_pairs, pairmake("Auth-Type", "LDAP", T_OP_EQ));
1294
1295
1296         DEBUG("rlm_ldap: user %s authorized to use remote access",
1297               request->username->strvalue);
1298         ldap_msgfree(result);
1299         ldap_release_conn(conn_id,inst->conns);
1300
1301         return RLM_MODULE_OK;
1302 }
1303
1304 /*****************************************************************************
1305  *
1306  *      Function: rlm_ldap_authenticate
1307  *
1308  *      Purpose: Check the user's password against ldap database
1309  *
1310  *****************************************************************************/
1311 static int
1312 ldap_authenticate(void *instance, REQUEST * request)
1313 {
1314         LDAP           *ld_user;
1315         LDAPMessage    *result, *msg;
1316         ldap_instance  *inst = instance;
1317         char           *user_dn, *attrs[] = {"uid", NULL};
1318         char            filter[MAX_FILTER_STR_LEN];
1319         char            basedn[MAX_FILTER_STR_LEN];
1320         int             res;
1321         VALUE_PAIR     *vp_user_dn;
1322         VALUE_PAIR      *module_fmsg_vp;
1323         char            module_fmsg[MAX_STRING_LEN];
1324         LDAP_CONN       *conn;
1325         int             conn_id = -1;
1326
1327         DEBUG("rlm_ldap: - authenticate");
1328
1329         /*
1330          * Ensure that we're being passed a plain-text password, and not
1331          * anything else.
1332          */
1333
1334         if (!request->username) {
1335                 radlog(L_AUTH, "rlm_ldap: Attribute \"User-Name\" is required for authentication.\n");
1336                 return RLM_MODULE_INVALID;
1337         }
1338
1339         if (!request->password){
1340                 radlog(L_AUTH, "rlm_ldap: Attribute \"User-Password\" is required for authentication.");
1341                 return RLM_MODULE_INVALID;
1342         }
1343
1344         if(request->password->attribute != PW_PASSWORD) {
1345                 radlog(L_AUTH, "rlm_ldap: Attribute \"User-Password\" is required for authentication. Cannot use \"%s\".", request->password->name);
1346                 return RLM_MODULE_INVALID;
1347         }
1348
1349         if (request->password->length == 0) {
1350                 radlog(L_ERR, "rlm_ldap: empty password supplied");
1351                 return RLM_MODULE_INVALID;
1352         }
1353
1354         /*
1355          * Check that we don't have any failed connections. If we do there's no real need
1356          * of runing. Also give it another chance if we have a lot of failed connections.
1357          */
1358         if (inst->failed_conns > MAX_FAILED_CONNS_END)
1359                 inst->failed_conns = 0;
1360         if (inst->failed_conns > MAX_FAILED_CONNS_START){
1361                 inst->failed_conns++;
1362                 return RLM_MODULE_FAIL;
1363         }
1364
1365
1366         DEBUG("rlm_ldap: login attempt by \"%s\" with password \"%s\"",
1367                request->username->strvalue, request->password->strvalue);
1368
1369         while((vp_user_dn = pairfind(request->packet->vps, PW_LDAP_USERDN)) == NULL) {
1370                 if (!radius_xlat(filter, sizeof(filter), inst->filter,
1371                                 request, NULL)) {
1372                         radlog (L_ERR, "rlm_ldap: unable to create filter.\n");
1373                         return RLM_MODULE_INVALID;
1374                 }
1375
1376                 if (!radius_xlat(basedn, sizeof(basedn), inst->basedn,
1377                                 request, NULL)) {
1378                         radlog (L_ERR, "rlm_ldap: unable to create basedn.\n");
1379                         return RLM_MODULE_INVALID;
1380                 }
1381
1382                 if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
1383                         radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
1384                         return RLM_MODULE_FAIL;
1385                 }
1386                 if ((res = perform_search(instance, conn, basedn, LDAP_SCOPE_SUBTREE, filter, attrs, &result)) != RLM_MODULE_OK) {
1387                         if (res == RLM_MODULE_NOTFOUND){
1388                                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: User not found");
1389                                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1390                                 pairadd(&request->packet->vps, module_fmsg_vp);
1391                         }
1392                         ldap_release_conn(conn_id,inst->conns);
1393                         return (res);
1394                 }
1395                 if ((msg = ldap_first_entry(conn->ld, result)) == NULL) {
1396                         ldap_msgfree(result);
1397                         ldap_release_conn(conn_id,inst->conns);
1398                         return RLM_MODULE_FAIL;
1399                 }
1400                 if ((user_dn = ldap_get_dn(conn->ld, msg)) == NULL) {
1401                         DEBUG("rlm_ldap: ldap_get_dn() failed");
1402                         ldap_msgfree(result);
1403                         ldap_release_conn(conn_id,inst->conns);
1404                         return RLM_MODULE_FAIL;
1405                 }
1406                 ldap_release_conn(conn_id,inst->conns);
1407                 pairadd(&request->packet->vps, pairmake("Ldap-UserDn", user_dn, T_OP_EQ));
1408                 ldap_memfree(user_dn);
1409                 ldap_msgfree(result);
1410         }
1411
1412         user_dn = vp_user_dn->strvalue;
1413
1414         DEBUG("rlm_ldap: user DN: %s", user_dn);
1415
1416         ld_user = ldap_connect(instance, user_dn, request->password->strvalue,
1417                                1, &res);
1418         if (ld_user == NULL){
1419                 if (res == RLM_MODULE_REJECT){
1420                         inst->failed_conns = 0;
1421                         snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Bind as user failed");
1422                         module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1423                         pairadd(&request->packet->vps, module_fmsg_vp);
1424                 }
1425                 if (res == RLM_MODULE_FAIL){
1426                         DEBUG("rlm_ldap: ldap_connect() failed");
1427                         inst->failed_conns++;
1428                 }
1429                 return (res);
1430         }
1431
1432         DEBUG("rlm_ldap: user %s authenticated succesfully",
1433               request->username->strvalue);
1434         ldap_unbind_s(ld_user);
1435         inst->failed_conns = 0;
1436
1437         return RLM_MODULE_OK;
1438 }
1439
1440 static LDAP    *
1441 ldap_connect(void *instance, const char *dn, const char *password, int auth, int *result)
1442 {
1443         ldap_instance  *inst = instance;
1444         LDAP           *ld = NULL;
1445         int             msgid, rc, ldap_version;
1446         int             ldap_errno = 0;
1447         LDAPMessage    *res;
1448
1449         if (inst->is_url){
1450 #ifdef HAVE_LDAP_INITIALIZE
1451                 DEBUG("rlm_ldap: (re)connect to %s, authentication %d", inst->server, auth);
1452                 if (ldap_initialize(&ld, inst->server) != LDAP_SUCCESS) {
1453                         radlog(L_ERR, "rlm_ldap: ldap_initialize() failed");
1454                         *result = RLM_MODULE_FAIL;
1455                         return (NULL);
1456                 }
1457 #endif
1458         }
1459         else{
1460                 DEBUG("rlm_ldap: (re)connect to %s:%d, authentication %d", inst->server, inst->port, auth);
1461                 if ((ld = ldap_init(inst->server, inst->port)) == NULL) {
1462                         radlog(L_ERR, "rlm_ldap: ldap_init() failed");
1463                         *result = RLM_MODULE_FAIL;
1464                         return (NULL);
1465                 }
1466         }
1467         if (ldap_set_option(ld, LDAP_OPT_NETWORK_TIMEOUT, (void *) &(inst->net_timeout)) != LDAP_OPT_SUCCESS) {
1468                 radlog(L_ERR, "rlm_ldap: Could not set LDAP_OPT_NETWORK_TIMEOUT %ld.%ld", inst->net_timeout.tv_sec, inst->net_timeout.tv_usec);
1469         }
1470         if (ldap_set_option(ld, LDAP_OPT_TIMELIMIT, (void *) &(inst->timelimit)) != LDAP_OPT_SUCCESS) {
1471                 radlog(L_ERR, "rlm_ldap: Could not set LDAP_OPT_TIMELIMIT %d", inst->timelimit);
1472         }
1473         if (inst->ldap_debug && ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, &(inst->ldap_debug)) != LDAP_OPT_SUCCESS) {
1474                 radlog(L_ERR, "rlm_ldap: Could not set LDAP_OPT_DEBUG_LEVEL %d", inst->ldap_debug);
1475         }
1476         ldap_version = LDAP_VERSION3;
1477         if (ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &ldap_version) != LDAP_OPT_SUCCESS) {
1478                 radlog(L_ERR, "rlm_ldap: Could not set LDAP version to V3");
1479         }
1480 #ifdef HAVE_LDAP_START_TLS
1481         if(inst->tls_mode) {
1482                 DEBUG("rlm_ldap: setting TLS mode to %d", inst->tls_mode);
1483                 if(ldap_set_option(ld, LDAP_OPT_X_TLS,
1484                            (void *) &(inst->tls_mode)) != LDAP_OPT_SUCCESS) {
1485                         ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
1486                         radlog(L_ERR, "rlm_ldap: could not set LDAP_OPT_X_TLS option %s", ldap_err2string(ldap_errno));
1487                 }
1488         }
1489         if (inst->start_tls) {
1490                 DEBUG("rlm_ldap: starting TLS");
1491                 rc = ldap_start_tls_s(ld, NULL, NULL);
1492                 if (rc != LDAP_SUCCESS) {
1493                         DEBUG("rlm_ldap: ldap_start_tls_s()");
1494                         ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
1495                         radlog(L_ERR, "rlm_ldap: could not start TLS %s", ldap_err2string(ldap_errno));
1496                         *result = RLM_MODULE_FAIL;
1497                         ldap_unbind_s(ld);
1498                         return (NULL);
1499                 }
1500         }
1501 #endif /* HAVE_LDAP_START_TLS */
1502
1503         if (inst->is_url){
1504                 DEBUG("rlm_ldap: bind as %s/%s to %s", dn, password, inst->server);
1505         }
1506         else{
1507                 DEBUG("rlm_ldap: bind as %s/%s to %s:%d", dn, password, inst->server, inst->port);
1508         }
1509         msgid = ldap_bind(ld, dn, password,LDAP_AUTH_SIMPLE);
1510         if (msgid == -1) {
1511                 ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
1512                 if (inst->is_url)
1513                         radlog(L_ERR, "rlm_ldap: %s bind to %s failed: %s",
1514                                 dn, inst->server, ldap_err2string(ldap_errno));
1515                 else
1516                         radlog(L_ERR, "rlm_ldap: %s bind to %s:%d failed: %s",
1517                                 dn, inst->server, inst->port,
1518                                 ldap_err2string(ldap_errno));
1519                 *result = RLM_MODULE_FAIL;
1520                 ldap_unbind_s(ld);
1521                 return (NULL);
1522         }
1523         DEBUG("rlm_ldap: waiting for bind result ...");
1524
1525         rc = ldap_result(ld, msgid, 1, &(inst->timeout), &res);
1526
1527         if(rc < 1) {
1528                 DEBUG("rlm_ldap: ldap_result()");
1529                 ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
1530                 if (inst->is_url)
1531                         radlog(L_ERR, "rlm_ldap: %s bind to %s failed: %s",
1532                                 dn, inst->server, (rc == 0) ? "timeout" : ldap_err2string(ldap_errno));
1533                 else
1534                         radlog(L_ERR, "rlm_ldap: %s bind to %s:%d failed: %s",
1535                                 dn, inst->server, inst->port,
1536                                 (rc == 0) ? "timeout" : ldap_err2string(ldap_errno));
1537                 *result = RLM_MODULE_FAIL;
1538                 ldap_unbind_s(ld);
1539                 return (NULL);
1540         }
1541         ldap_errno = ldap_result2error(ld, res, 1);
1542         switch (ldap_errno) {
1543         case LDAP_SUCCESS:
1544                 *result = RLM_MODULE_OK;
1545                 break;
1546
1547         case LDAP_INVALID_CREDENTIALS:
1548                 if (auth)
1549                         *result = RLM_MODULE_REJECT;
1550                 else {
1551                         radlog(L_ERR, "rlm_ldap: LDAP login failed: check login, password settings in ldap section of radiusd.conf");
1552                         *result = RLM_MODULE_FAIL;
1553                 }
1554                 break;
1555
1556         default:
1557                 if (inst->is_url)
1558                         radlog(L_ERR,"rlm_ldap: %s bind to %s failed %s",
1559                                 dn, inst->server, ldap_err2string(ldap_errno));
1560                 else
1561                         radlog(L_ERR,"rlm_ldap: %s bind to %s:%d failed %s",
1562                                 dn, inst->server, inst->port,
1563                                 ldap_err2string(ldap_errno));
1564                 *result = RLM_MODULE_FAIL;
1565         }
1566
1567         if (*result != RLM_MODULE_OK) {
1568                 ldap_unbind_s(ld);
1569                 ld = NULL;
1570         }
1571         return ld;
1572 }
1573
1574 /*****************************************************************************
1575  *
1576  *      Detach from the LDAP server and cleanup internal state.
1577  *
1578  *****************************************************************************/
1579 static int
1580 ldap_detach(void *instance)
1581 {
1582         ldap_instance  *inst = instance;
1583         TLDAP_RADIUS *pair, *nextpair;
1584
1585         if (inst->server)
1586                 free((char *) inst->server);
1587         if (inst->login)
1588                 free((char *) inst->login);
1589         if (inst->password)
1590                 free((char *) inst->password);
1591         if (inst->basedn)
1592                 free((char *) inst->basedn);
1593         if (inst->dictionary_mapping)
1594                 free(inst->dictionary_mapping);
1595         if (inst->filter)
1596                 free((char *) inst->filter);
1597         if (inst->passwd_hdr)
1598                 free((char *) inst->passwd_hdr);
1599         if (inst->passwd_attr)
1600                 free((char *) inst->passwd_attr);
1601         if (inst->groupname_attr)
1602                 free((char *) inst->groupname_attr);
1603         if (inst->groupmemb_filt)
1604                 free((char *) inst->groupmemb_filt);
1605         if (inst->groupmemb_attr)
1606                 free((char *) inst->groupmemb_attr);
1607         if (inst->access_attr)
1608                 free((char *) inst->access_attr);
1609         if (inst->profile_attr)
1610                 free((char *) inst->profile_attr);
1611         if (inst->conns){
1612                 int i=0;
1613
1614                 for(;i<inst->num_conns;i++){
1615                         if (inst->conns[i].ld){
1616                                 ldap_unbind_s(inst->conns[i].ld);
1617                         }
1618                         pthread_mutex_destroy(&inst->conns[i].mutex);
1619                 }
1620                 free(inst->conns);
1621         }
1622
1623         pair = inst->check_item_map;
1624
1625         while (pair != NULL) {
1626                 nextpair = pair->next;
1627                 free(pair->attr);
1628                 free(pair->radius_attr);
1629                 free(pair);
1630                 pair = nextpair;
1631         }
1632
1633         pair = inst->reply_item_map;
1634
1635         while (pair != NULL) {
1636                 nextpair = pair->next;
1637                 free(pair->attr);
1638                 free(pair->radius_attr);
1639                 free(pair);
1640                 pair = nextpair;
1641         }
1642
1643         if (inst->atts)
1644                 free(inst->atts);
1645
1646         paircompare_unregister(PW_LDAP_GROUP, ldap_groupcmp);
1647         xlat_unregister(inst->xlat_name,ldap_xlat);
1648         free(inst->xlat_name);
1649
1650         free(inst);
1651
1652         return 0;
1653 }
1654
1655 #ifdef FIELDCPY
1656 static void
1657 fieldcpy(char *string, char **uptr)
1658 {
1659         char           *ptr;
1660
1661         ptr = *uptr;
1662         while (*ptr == ' ' || *ptr == '\t') {
1663                 ptr++;
1664         }
1665         if (*ptr == '"') {
1666                 ptr++;
1667                 while (*ptr != '"' && *ptr != '\0' && *ptr != '\n') {
1668                         *string++ = *ptr++;
1669                 }
1670                 *string = '\0';
1671                 if (*ptr == '"') {
1672                         ptr++;
1673                 }
1674                 *uptr = ptr;
1675                 return;
1676         }
1677         while (*ptr != ' ' && *ptr != '\t' && *ptr != '\0' && *ptr != '\n' &&
1678                *ptr != '=' && *ptr != ',') {
1679                 *string++ = *ptr++;
1680         }
1681         *string = '\0';
1682         *uptr = ptr;
1683         return;
1684 }
1685 #endif
1686 /*****************************************************************************
1687  *      Get RADIUS attributes from LDAP object
1688  *      ( according to draft-adoba-radius-05.txt
1689  *        <http://www.ietf.org/internet-drafts/draft-adoba-radius-05.txt> )
1690  *
1691  *****************************************************************************/
1692
1693 static VALUE_PAIR *
1694 ldap_pairget(LDAP * ld, LDAPMessage * entry,
1695              TLDAP_RADIUS * item_map, VALUE_PAIR **pairs,char is_check)
1696 {
1697         char          **vals;
1698         int             vals_count;
1699         int             vals_idx;
1700         char           *ptr;
1701         TLDAP_RADIUS   *element;
1702         LRAD_TOKEN      token;
1703         int             is_generic_attribute;
1704         char            value[256];
1705         VALUE_PAIR     *pairlist = NULL;
1706         VALUE_PAIR     *newpair = NULL;
1707
1708         /* check if there is a mapping from this LDAP attribute to a RADIUS attribute */
1709         for (element = item_map; element != NULL; element = element->next) {
1710         if ((vals = ldap_get_values(ld,entry,element->attr)) != NULL){
1711                         /* check whether this is a one-to-one-mapped ldap attribute or a generic
1712                            attribute and set flag accordingly */
1713
1714                         if (strcasecmp(element->radius_attr, GENERIC_ATTRIBUTE_ID)==0)
1715                                 is_generic_attribute = 1;
1716                         else
1717                                 is_generic_attribute = 0;
1718
1719                         /* find out how many values there are for the attribute and extract all of them */
1720
1721                         vals_count = ldap_count_values(vals);
1722
1723                         for (vals_idx = 0; vals_idx < vals_count; vals_idx++) {
1724                                 ptr = vals[vals_idx];
1725
1726                                 if (is_generic_attribute) {
1727                                         /* this is a generic attribute */
1728                                         LRAD_TOKEN dummy; /* makes pairread happy */
1729
1730                                         /* not sure if using pairread here is ok ... */
1731                                         if ( (newpair = pairread(&ptr, &dummy)) != NULL) {
1732                                                 DEBUG("rlm_ldap: extracted attribute %s from generic item %s",
1733                                                       newpair->name, vals[vals_idx]);
1734                                                 pairadd(&pairlist, newpair);
1735                                         } else {
1736                                                 radlog(L_ERR, "rlm_ldap: parsing %s failed: %s",
1737                                                        element->attr, vals[vals_idx]);
1738                                         }
1739                                 } else {
1740                                         /* this is a one-to-one-mapped attribute */
1741                                         token = gettoken(&ptr, value, sizeof(value) - 1);
1742                                         if (token < T_EQSTART || token > T_EQEND) {
1743                                                 token = (is_check) ? T_OP_CMP_EQ : T_OP_EQ;
1744                                         } else {
1745                                                 gettoken(&ptr, value, sizeof(value) - 1);
1746                                         }
1747                                         if (value[0] == 0) {
1748                                                 DEBUG("rlm_ldap: Attribute %s has no value", element->attr);
1749                                                 break;
1750                                         }
1751                                         DEBUG("rlm_ldap: Adding %s as %s, value %s & op=%d", element->attr, element->radius_attr, value, token);
1752                                                 if ((newpair = pairmake(element->radius_attr, value, token)) == NULL)
1753                                                 continue;
1754                                         if (! vals_idx){
1755                                                 pairdelete(pairs,newpair->attribute);
1756                                         }
1757                                         pairadd(&pairlist, newpair);
1758                                 }
1759                         }
1760                         ldap_value_free(vals);
1761                 }
1762         }
1763
1764         return (pairlist);
1765 }
1766
1767 /* globally exported name */
1768 module_t        rlm_ldap = {
1769         "LDAP",
1770         RLM_TYPE_THREAD_SAFE,   /* type: reserved        */
1771         NULL,                   /* initialization        */
1772         ldap_instantiate,       /* instantiation         */
1773         {
1774                 ldap_authenticate,      /* authentication        */
1775                 ldap_authorize,         /* authorization         */
1776                 NULL,                   /* preaccounting         */
1777                 NULL,                   /* accounting            */
1778                 NULL,                   /* checksimul            */
1779                 NULL,                   /* pre-proxy             */
1780                 NULL,                   /* post-proxy            */
1781                 NULL                    /* post-auth             */
1782         },
1783         ldap_detach,            /* detach                */
1784         NULL,                   /* destroy               */
1785 };