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  * Oct 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
 138  *      - Add a new configuration directive, base_filter which is used for base scope searches
 139  *        (When searching for the default/regular profiles for example)
 140  * Nov 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
 141  *      - Add a new configuration directive, do_xlat (default: yes). If set we use pairxlatmove
 142  *        on the radius attributes, else we fall back to the plain old pairadd. That way people
 143  *        can fall back on the 0.8.1 behaviour without making changes to their ldap database or
 144  *        gain a little performance by not using pairxlatmove
 145  * Dec 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
 146  *      - Add a patch from Jon Miner <miner@doit.wisc.edu> to add the ability to configure
 147  *        various LDAP TLS options
 148  *      - Only call pairfree if we are using pairxlatmove not for pairadd
 149  */
 150 static const char rcsid[] = "$Id$";
 151
 152 #include "autoconf.h"
 153
 154 #include        <sys/types.h>
 155 #include        <sys/socket.h>
 156 #include        <sys/time.h>
 157 #include        <netinet/in.h>
 158
 159 #include        <stdio.h>
 160 #include        <stdlib.h>
 161 #include        <netdb.h>
 162 #include        <pwd.h>
 163 #include        <time.h>
 164 #include        <ctype.h>
 165 #include        <string.h>
 166
 167 #include        <lber.h>
 168 #include        <ldap.h>
 169
 170 #include        <errno.h>
 171 #include        <unistd.h>
 172 #include        <pthread.h>
 173
 174 #include        "libradius.h"
 175 #include        "radiusd.h"
 176 #include        "conffile.h"
 177 #include        "modules.h"
 178 #include        "rad_assert.h"
 179
 180 #ifndef HAVE_PTHREAD_H
 181 /*
 182  *      This is a lot simpler than putting ifdef's around
 183  *      every use of the pthread functions.
 184  */
 185 #define pthread_mutex_lock(a)
 186 #define pthread_mutex_unlock(a)
 187 #define pthread_mutex_init(a,b)
 188 #define pthread_mutex_destroy(a)
 189 #endif
 190
 191
 192 #define MAX_FILTER_STR_LEN      1024
 193 #define TIMELIMIT 5
 194
 195 /*
 196  * These are used in case ldap_search returns LDAP_SERVER_DOWN
 197  * In that case we do conn->failed_conns++ and then check it:
 198  * If conn->failed_conns <= MAX_FAILED_CONNS_START then we try
 199  * to reconnect
 200  * conn->failed_conns is also checked on entrance in perform_search:
 201  * If conn->failed_conns > MAX_FAILED_CONNS_START then we don't
 202  * try to do anything and we just do conn->failed_conns++ and
 203  * return RLM_MODULE_FAIL
 204  * if conn->failed_conns >= MAX_FAILED_CONNS_END then we give it
 205  * another chance and we set it to MAX_FAILED_CONNS_RESTART and
 206  * try to reconnect.
 207  *
 208  *
 209  * We are assuming that the majority of the LDAP_SERVER_DOWN cases
 210  * will either be an ldap connection timeout or a temporary ldap
 211  * server problem.
 212  * As a result we make a few attempts to reconnect hoping that the problem
 213  * will soon go away. If it does not go away then we just return
 214  * RLM_MODULE_FAIL on entrance in perform_search until conn->failed_conns
 215  * gets to MAX_FAILED_CONNS_END. After that we give it one more chance by
 216  * going back to MAX_FAILED_CONNS_RESTART
 217  *
 218  */
 219
 220 #define MAX_FAILED_CONNS_END            20
 221 #define MAX_FAILED_CONNS_RESTART        4
 222 #define MAX_FAILED_CONNS_START          5
 223
 224 /* linked list of mappings between RADIUS attributes and LDAP attributes */
 225 struct TLDAP_RADIUS {
 226         char*                 attr;
 227         char*                 radius_attr;
 228         struct TLDAP_RADIUS*  next;
 229 };
 230 typedef struct TLDAP_RADIUS TLDAP_RADIUS;
 231
 232 typedef struct ldap_conn {
 233         LDAP            *ld;
 234         char            bound;
 235         char            locked;
 236         int             failed_conns;
 237         pthread_mutex_t mutex;
 238 } LDAP_CONN;
 239
 240 typedef struct {
 241         char           *server;
 242         int             port;
 243         int             timelimit;
 244         struct timeval  net_timeout;
 245         struct timeval  timeout;
 246         int             debug;
 247         int             tls_mode;
 248         int             start_tls;
 249         int             num_conns;
 250         int             do_comp;
 251         int             do_xlat;
 252         int             default_allow;
 253         int             failed_conns;
 254         int             is_url;
 255         char           *login;
 256         char           *password;
 257         char           *filter;
 258         char           *base_filter;
 259         char           *basedn;
 260         char           *default_profile;
 261         char           *profile_attr;
 262         char           *access_attr;
 263         char           *passwd_hdr;
 264         char           *passwd_attr;
 265         char           *dictionary_mapping;
 266         char           *groupname_attr;
 267         char           *groupmemb_filt;
 268         char           *groupmemb_attr;
 269         char            **atts;
 270         TLDAP_RADIUS   *check_item_map;
 271         TLDAP_RADIUS   *reply_item_map;
 272         LDAP_CONN       *conns;
 273         int             ldap_debug; /* Debug flag for LDAP SDK */
 274         char            *xlat_name; /* name used to xlat */
 275         char            *tls_cacertfile;
 276         char            *tls_cacertdir;
 277         char            *tls_certfile;
 278         char            *tls_keyfile;
 279         char            *tls_randfile;
 280         char            *tls_require_cert;
 281 }               ldap_instance;
 282
 283 /* The default setting for TLS Certificate Verification */
 284 #define TLS_DEFAULT_VERIFY "allow"
 285
 286 static CONF_PARSER module_config[] = {
 287         {"server", PW_TYPE_STRING_PTR, offsetof(ldap_instance,server), NULL, "localhost"},
 288         {"port", PW_TYPE_INTEGER, offsetof(ldap_instance,port), NULL, "389"},
 289         /* wait forever on network activity */
 290         {"net_timeout", PW_TYPE_INTEGER, offsetof(ldap_instance,net_timeout.tv_sec), NULL, "10"},
 291         /* wait forever for search results */
 292         {"timeout", PW_TYPE_INTEGER, offsetof(ldap_instance,timeout.tv_sec), NULL, "20"},
 293         /* allow server unlimited time for search (server-side limit) */
 294         {"timelimit", PW_TYPE_INTEGER, offsetof(ldap_instance,timelimit), NULL, "20"},
 295         {"identity", PW_TYPE_STRING_PTR, offsetof(ldap_instance,login), NULL, ""},
 296         {"start_tls", PW_TYPE_BOOLEAN, offsetof(ldap_instance,start_tls), NULL, "no"},
 297         {"tls_cacertfile", PW_TYPE_STRING_PTR, offsetof(ldap_instance,tls_cacertfile), NULL, NULL},
 298         {"tls_cacertdir", PW_TYPE_STRING_PTR, offsetof(ldap_instance,tls_cacertdir), NULL, NULL},
 299         {"tls_certfile", PW_TYPE_STRING_PTR, offsetof(ldap_instance,tls_certfile), NULL, NULL},
 300         {"tls_keyfile", PW_TYPE_STRING_PTR, offsetof(ldap_instance,tls_keyfile), NULL, NULL},
 301         {"tls_randfile", PW_TYPE_STRING_PTR, offsetof(ldap_instance,tls_randfile), NULL, NULL},
 302         {"tls_require_cert", PW_TYPE_STRING_PTR, offsetof(ldap_instance,tls_require_cert), NULL, TLS_DEFAULT_VERIFY},
 303         {"password", PW_TYPE_STRING_PTR, offsetof(ldap_instance,password), NULL, ""},
 304         {"basedn", PW_TYPE_STRING_PTR, offsetof(ldap_instance,basedn), NULL, "o=notexist"},
 305         {"filter", PW_TYPE_STRING_PTR, offsetof(ldap_instance,filter), NULL, "(uid=%u)"},
 306         {"base_filter", PW_TYPE_STRING_PTR, offsetof(ldap_instance,base_filter), NULL, "(objectclass=radiusprofile)"},
 307         {"default_profile", PW_TYPE_STRING_PTR, offsetof(ldap_instance,default_profile), NULL, NULL},
 308         {"profile_attribute", PW_TYPE_STRING_PTR, offsetof(ldap_instance,profile_attr), NULL, NULL},
 309         {"password_header", PW_TYPE_STRING_PTR, offsetof(ldap_instance,passwd_hdr), NULL, NULL},
 310         {"password_attribute", PW_TYPE_STRING_PTR, offsetof(ldap_instance,passwd_attr), NULL, NULL},
 311         /* LDAP attribute name that controls remote access */
 312         {"access_attr", PW_TYPE_STRING_PTR, offsetof(ldap_instance,access_attr), NULL, NULL},
 313         /* file with mapping between LDAP and RADIUS attributes */
 314         {"groupname_attribute", PW_TYPE_STRING_PTR, offsetof(ldap_instance,groupname_attr), NULL, "cn"},
 315         {"groupmembership_filter", PW_TYPE_STRING_PTR, offsetof(ldap_instance,groupmemb_filt), NULL, "(|(&(objectClass=GroupOfNames)(member=%{Ldap-UserDn}))(&(objectClass=GroupOfUniqueNames)(uniquemember=%{Ldap-UserDn})))"},
 316         {"groupmembership_attribute", PW_TYPE_STRING_PTR, offsetof(ldap_instance,groupmemb_attr), NULL, NULL},
 317         {"dictionary_mapping", PW_TYPE_STRING_PTR, offsetof(ldap_instance,dictionary_mapping), NULL, "${confdir}/ldap.attrmap"},
 318         {"ldap_debug", PW_TYPE_INTEGER, offsetof(ldap_instance,ldap_debug), NULL, "0x0000"},
 319         {"ldap_connections_number", PW_TYPE_INTEGER, offsetof(ldap_instance,num_conns), NULL, "5"},
 320         {"compare_check_items", PW_TYPE_BOOLEAN, offsetof(ldap_instance,do_comp), NULL, "no"},
 321         {"access_attr_used_for_allow", PW_TYPE_BOOLEAN, offsetof(ldap_instance,default_allow), NULL, "yes"},
 322         {"do_xlat", PW_TYPE_BOOLEAN, offsetof(ldap_instance,do_xlat), NULL, "yes"},
 323
 324         {NULL, -1, 0, NULL, NULL}
 325 };
 326
 327 #define ld_valid                ld_options.ldo_valid
 328 #define LDAP_VALID_SESSION      0x2
 329 #define LDAP_VALID(ld)  ( (ld)->ld_valid == LDAP_VALID_SESSION )
 330
 331 #ifdef FIELDCPY
 332 static void     fieldcpy(char *, char **);
 333 #endif
 334 static VALUE_PAIR *ldap_pairget(LDAP *, LDAPMessage *, TLDAP_RADIUS *,VALUE_PAIR **,char);
 335 static int ldap_groupcmp(void *, REQUEST *, VALUE_PAIR *, VALUE_PAIR *, VALUE_PAIR *, VALUE_PAIR **);
 336 static int ldap_xlat(void *,REQUEST *, char *, char *,int, RADIUS_ESCAPE_STRING);
 337 static LDAP    *ldap_connect(void *instance, const char *, const char *, int, int *);
 338 static int     read_mappings(ldap_instance* inst);
 339
 340 static inline int ldap_get_conn(LDAP_CONN *conns,LDAP_CONN **ret,void *instance)
 341 {
 342         ldap_instance *inst = instance;
 343         register int i = 0;
 344
 345         for(;i<inst->num_conns;i++){
 346                 if (conns[i].locked == 0 && pthread_mutex_trylock(&(conns[i].mutex)) == 0){
 347                         *ret = &conns[i];
 348                         conns[i].locked = 1;
 349                         DEBUG("ldap_get_conn: Got Id: %d",i);
 350                         return i;
 351                 }
 352         }
 353
 354         return -1;
 355 }
 356
 357 static inline void ldap_release_conn(int i, LDAP_CONN *conns)
 358 {
 359         DEBUG("ldap_release_conn: Release Id: %d",i);
 360         conns[i].locked = 0;
 361         pthread_mutex_unlock(&(conns[i].mutex));
 362 }
 363
 364 /*************************************************************************
 365  *
 366  *      Function: rlm_ldap_instantiate
 367  *
 368  *      Purpose: Uses section of radiusd config file passed as parameter
 369  *               to create an instance of the module.
 370  *
 371  *************************************************************************/
 372 static int
 373 ldap_instantiate(CONF_SECTION * conf, void **instance)
 374 {
 375         ldap_instance  *inst;
 376         int i = 0;
 377         int atts_num = 0;
 378         int reply_map_num = 0;
 379         int check_map_num = 0;
 380         int att_map[3] = {0,0,0};
 381         TLDAP_RADIUS *pair;
 382         char *xlat_name;
 383
 384         inst = rad_malloc(sizeof *inst);
 385         if (!inst) {
 386                 return -1;
 387         }
 388         memset(inst, 0, sizeof(*inst));
 389
 390         if (cf_section_parse(conf, inst, module_config) < 0) {
 391                 free(inst);
 392                 return -1;
 393         }
 394
 395         if (inst->server == NULL) {
 396                 radlog(L_ERR, "rlm_ldap: missing 'server' directive.");
 397                 free(inst);
 398                 return -1;
 399         }
 400         inst->is_url = 0;
 401 #ifdef HAVE_LDAP_INITIALIZE
 402         if (ldap_is_ldap_url(inst->server)){
 403                 inst->is_url = 1;
 404                 inst->port = 0;
 405         }
 406 #endif
 407
 408         inst->timeout.tv_usec = 0;
 409         inst->net_timeout.tv_usec = 0;
 410         /* workaround for servers which support LDAPS but not START TLS */
 411         if(inst->port == LDAPS_PORT)
 412                 inst->tls_mode = LDAP_OPT_X_TLS_HARD;
 413         else
 414                 inst->tls_mode = 0;
 415         inst->reply_item_map = NULL;
 416         inst->check_item_map = NULL;
 417         inst->conns = NULL;
 418         inst->failed_conns = 0;
 419
 420         paircompare_register(PW_LDAP_GROUP, PW_USER_NAME, ldap_groupcmp, inst);
 421         DEBUG("conns: %p",inst->conns);
 422
 423         xlat_name = cf_section_name2(conf);
 424         if (xlat_name == NULL) {
 425                 xlat_name = cf_section_name1(conf);
 426                 rad_assert(xlat_name != NULL); /* or all hell breaks loose */
 427         }
 428         inst->xlat_name = strdup(xlat_name);
 429         xlat_register(xlat_name,ldap_xlat,inst);
 430
 431         if (inst->num_conns <= 0){
 432                 radlog(L_ERR, "rlm_ldap: Invalid ldap connections number passed.");
 433                 free(inst);
 434                 return -1;
 435         }
 436         inst->conns = (LDAP_CONN *)malloc(sizeof(LDAP_CONN)*inst->num_conns);
 437         if (inst->conns == NULL){
 438                 radlog(L_ERR, "rlm_ldap: Could not allocate memory. Aborting.");
 439                 free(inst);
 440                 return -1;
 441         }
 442         for(;i<inst->num_conns;i++){
 443                 inst->conns[i].bound = 0;
 444                 inst->conns[i].locked = 0;
 445                 inst->conns[i].failed_conns = 0;
 446                 inst->conns[i].ld = NULL;
 447                 pthread_mutex_init(&inst->conns[i].mutex, NULL);
 448         }
 449
 450         if (read_mappings(inst) != 0) {
 451                 radlog(L_ERR, "rlm_ldap: Reading dictionary mappings from file %s failed",
 452                        inst->dictionary_mapping);
 453                 radlog(L_ERR, "rlm_ldap: Proceeding with no mappings");
 454         }
 455
 456         pair = inst->check_item_map;
 457         while(pair != NULL){
 458                 atts_num++;
 459                 pair = pair->next;
 460         }
 461         check_map_num = (atts_num - 1);
 462         pair = inst->reply_item_map;
 463         while(pair != NULL){
 464                 atts_num++;
 465                 pair = pair->next;
 466         }
 467         reply_map_num = (atts_num - 1);
 468         if (inst->profile_attr)
 469                 atts_num++;
 470         if (inst->passwd_attr)
 471                 atts_num++;
 472         if (inst->access_attr)
 473                 atts_num++;
 474         inst->atts = (char **)malloc(sizeof(char *)*(atts_num + 1));
 475         if (inst->atts == NULL){
 476                 radlog(L_ERR, "rlm_ldap: Could not allocate memory. Aborting.");
 477                 free(inst);
 478                 return -1;
 479         }
 480         pair = inst->check_item_map;
 481         for(i=0;i<atts_num;i++){
 482                 if (i <= check_map_num ){
 483                         inst->atts[i] = pair->attr;
 484                         if (i == check_map_num)
 485                                 pair = inst->reply_item_map;
 486                         else
 487                                 pair = pair->next;
 488                 }
 489                 else if (i <= reply_map_num){
 490                         inst->atts[i] = pair->attr;
 491                         pair = pair->next;
 492                 }
 493                 else{
 494                         if (inst->profile_attr && !att_map[0]){
 495                                 inst->atts[i] = inst->profile_attr;
 496                                 att_map[0] = 1;
 497                         }
 498                         else if (inst->passwd_attr && !att_map[1]){
 499                                 inst->atts[i] = inst->passwd_attr;
 500                                 att_map[1] = 1;
 501                         }
 502                         else if (inst->access_attr && !att_map[2]){
 503                                 inst->atts[i] = inst->access_attr;
 504                                 att_map[2] = 1;
 505                         }
 506                 }
 507         }
 508         inst->atts[atts_num] = NULL;
 509
 510         DEBUG("conns: %p",inst->conns);
 511
 512         *instance = inst;
 513
 514
 515         return 0;
 516 }
 517
 518
 519 /*
 520  * read_mappings(...) reads a ldap<->radius mappings file to inst->reply_item_map and inst->check_item_map
 521  */
 522
 523 #define MAX_LINE_LEN 160
 524 #define GENERIC_ATTRIBUTE_ID "$GENERIC$"
 525
 526 static int
 527 read_mappings(ldap_instance* inst)
 528 {
 529         FILE* mapfile;
 530         char *filename;
 531         /* all buffers are of MAX_LINE_LEN so we can use sscanf without being afraid of buffer overflows */
 532         char buf[MAX_LINE_LEN], itemType[MAX_LINE_LEN], radiusAttribute[MAX_LINE_LEN], ldapAttribute[MAX_LINE_LEN];
 533         int linenumber;
 534
 535         /* open the mappings file for reading */
 536
 537         filename = inst->dictionary_mapping;
 538         DEBUG("rlm_ldap: reading ldap<->radius mappings from file %s", filename);
 539         mapfile = fopen(filename, "r");
 540
 541         if (mapfile == NULL) {
 542                 radlog(L_ERR, "rlm_ldap: Opening file %s failed", filename);
 543                 return -1; /* error */
 544         }
 545
 546         /* read file line by line. Note that if line length exceed MAX_LINE_LEN, line numbers will be mixed up */
 547
 548         linenumber = 0;
 549
 550         while (fgets(buf, sizeof buf, mapfile)!=NULL) {
 551                 char* ptr;
 552                 int token_count;
 553                 TLDAP_RADIUS* pair;
 554
 555                 linenumber++;
 556
 557                 /* strip comments */
 558                 ptr = strchr(buf, '#');
 559                 if (ptr) *ptr = 0;
 560
 561                 /* empty line */
 562                 if (buf[0] == 0) continue;
 563
 564                 /* extract tokens from the string */
 565                 token_count = sscanf(buf, "%s %s %s", itemType, radiusAttribute, ldapAttribute);
 566
 567                 if (token_count <= 0) /* no tokens */
 568                         continue;
 569
 570                 if (token_count != 3) {
 571                         radlog(L_ERR, "rlm_ldap: Skipping %s line %i: %s", filename, linenumber, buf);
 572                         radlog(L_ERR, "rlm_ldap: Expected 3 tokens "
 573                                "(Item type, RADIUS Attribute and LDAP Attribute) but found only %i", token_count);
 574                         continue;
 575                 }
 576
 577                 /* create new TLDAP_RADIUS list node */
 578                 pair = rad_malloc(sizeof(TLDAP_RADIUS));
 579
 580                 pair->attr = strdup(ldapAttribute);
 581                 pair->radius_attr = strdup(radiusAttribute);
 582
 583                 if ( (pair->attr == NULL) || (pair->radius_attr == NULL) ) {
 584                         radlog(L_ERR, "rlm_ldap: Out of memory");
 585                         if (pair->attr) free(pair->attr);
 586                         if (pair->radius_attr) free(pair->radius_attr);
 587                         free(pair);
 588                         fclose(mapfile);
 589                         return -1;
 590                 }
 591
 592                 /* push node to correct list */
 593                 if (strcasecmp(itemType, "checkItem") == 0) {
 594                         pair->next = inst->check_item_map;
 595                         inst->check_item_map = pair;
 596                 } else if (strcasecmp(itemType, "replyItem") == 0) {
 597                         pair->next = inst->reply_item_map;
 598                         inst->reply_item_map = pair;
 599                 } else {
 600                         radlog(L_ERR, "rlm_ldap: file %s: skipping line %i: unknown itemType %s",
 601                                filename, linenumber, itemType);
 602                         free(pair->attr);
 603                         free(pair->radius_attr);
 604                         free(pair);
 605                         continue;
 606                 }
 607
 608                 DEBUG("rlm_ldap: LDAP %s mapped to RADIUS %s",
 609                       pair->attr, pair->radius_attr);
 610         }
 611
 612         fclose(mapfile);
 613
 614         return 0; /* success */
 615 }
 616
 617 static int
 618 perform_search(void *instance, LDAP_CONN *conn, char *search_basedn, int scope, char *filter,
 619                 char **attrs, LDAPMessage ** result)
 620 {
 621         int             res = RLM_MODULE_OK;
 622         int             ldap_errno = 0;
 623         ldap_instance  *inst = instance;
 624         int             search_retry = 0;
 625
 626         *result = NULL;
 627
 628         if (!conn){
 629                 radlog(L_ERR, "rlm_ldap: NULL connection handle passed");
 630                 return RLM_MODULE_FAIL;
 631         }
 632         if (conn->failed_conns > MAX_FAILED_CONNS_START){
 633                 conn->failed_conns++;
 634                 if (conn->failed_conns >= MAX_FAILED_CONNS_END){
 635                         conn->failed_conns = MAX_FAILED_CONNS_RESTART;
 636                         conn->bound = 0;
 637                 }
 638         }
 639 retry:
 640         if (!conn->bound || conn->ld == NULL) {
 641                 DEBUG2("rlm_ldap: attempting LDAP reconnection");
 642                 if (conn->ld){
 643                         DEBUG2("rlm_ldap: closing existing LDAP connection");
 644                         ldap_unbind_s(conn->ld);
 645                 }
 646                 if ((conn->ld = ldap_connect(instance, inst->login, inst->password, 0, &res)) == NULL) {
 647                         radlog(L_ERR, "rlm_ldap: (re)connection attempt failed");
 648                         if (search_retry == 0)
 649                                 conn->failed_conns++;
 650                         return (RLM_MODULE_FAIL);
 651                 }
 652                 conn->bound = 1;
 653                 conn->failed_conns = 0;
 654         }
 655         DEBUG2("rlm_ldap: performing search in %s, with filter %s", search_basedn ? search_basedn : "(null)" , filter);
 656         switch (ldap_search_st(conn->ld, search_basedn, scope, filter, attrs, 0, &(inst->timeout), result)) {
 657         case LDAP_SUCCESS:
 658         case LDAP_NO_SUCH_OBJECT:
 659                 break;
 660         case LDAP_SERVER_DOWN:
 661                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: LDAP connection lost.");
 662                 conn->failed_conns++;
 663                 if (search_retry == 0){
 664                         if (conn->failed_conns <= MAX_FAILED_CONNS_START){
 665                                 radlog(L_INFO, "rlm_ldap: Attempting reconnect");
 666                                 search_retry = 1;
 667                                 conn->bound = 0;
 668                                 ldap_msgfree(*result);
 669                                 goto retry;
 670                         }
 671                 }
 672                 ldap_msgfree(*result);
 673                 return RLM_MODULE_FAIL;
 674         case LDAP_INSUFFICIENT_ACCESS:
 675                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: Insufficient access. Check the identity and password configuration directives.");
 676                 ldap_msgfree(*result);
 677                 return RLM_MODULE_FAIL;
 678         case LDAP_TIMEOUT:
 679                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: Timed out while waiting for server to respond. Please increase the timeout.");
 680                 ldap_msgfree(*result);
 681                 return RLM_MODULE_FAIL;
 682         case LDAP_FILTER_ERROR:
 683                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: Bad search filter: %s",filter);
 684                 ldap_msgfree(*result);
 685                 return RLM_MODULE_FAIL;
 686         case LDAP_TIMELIMIT_EXCEEDED:
 687         case LDAP_BUSY:
 688         case LDAP_UNAVAILABLE:
 689                 /* We don't need to reconnect in these cases so we don't set conn->bound */
 690                 ldap_get_option(conn->ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
 691                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: %s", ldap_err2string(ldap_errno));
 692                 ldap_msgfree(*result);
 693                 return (RLM_MODULE_FAIL);
 694         default:
 695                 ldap_get_option(conn->ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
 696                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: %s", ldap_err2string(ldap_errno));
 697                 conn->bound = 0;
 698                 ldap_msgfree(*result);
 699                 return (RLM_MODULE_FAIL);
 700         }
 701
 702         if ((ldap_count_entries(conn->ld, *result)) != 1) {
 703                 DEBUG("rlm_ldap: object not found or got ambiguous search result");
 704                 res = RLM_MODULE_NOTFOUND;
 705                 ldap_msgfree(*result);
 706         }
 707         return res;
 708 }
 709
 710
 711 /*
 712  *      Translate the LDAP queries.
 713  */
 714 static int ldap_escape_func(char *out, int outlen, const char *in)
 715 {
 716         int len = 0;
 717
 718         while (in[0]) {
 719                 /*
 720                  *  Only one byte left.
 721                  */
 722                 if (outlen <= 1) {
 723                         break;
 724                 }
 725
 726                 if (strchr("*", *in)) {
 727                         in++;
 728                         outlen--;
 729                         continue;
 730                 }
 731
 732                 /*
 733                  *      Else it's a nice character.
 734                  */
 735                 *out = *in;
 736                 out++;
 737                 in++;
 738                 outlen--;
 739                 len++;
 740         }
 741         *out = '\0';
 742         return len;
 743 }
 744
 745 /*
 746  * ldap_groupcmp(). Implement the Ldap-Group == "group" filter
 747  */
 748
 749 static int ldap_groupcmp(void *instance, REQUEST *req, VALUE_PAIR *request, VALUE_PAIR *check,
 750                 VALUE_PAIR *check_pairs, VALUE_PAIR **reply_pairs)
 751 {
 752         char            filter[MAX_FILTER_STR_LEN];
 753         char            gr_filter[MAX_FILTER_STR_LEN];
 754         int             res;
 755         LDAPMessage     *result = NULL;
 756         LDAPMessage     *msg = NULL;
 757         char            basedn[MAX_FILTER_STR_LEN];
 758         char            *attrs[] = {"dn",NULL};
 759         char            **vals;
 760         ldap_instance   *inst = instance;
 761         char            *group_attrs[] = {inst->groupmemb_attr,NULL};
 762         LDAP_CONN       *conn;
 763         int             conn_id = -1;
 764         VALUE_PAIR      *vp_user_dn;
 765         VALUE_PAIR      **request_pairs;
 766
 767         request_pairs = &req->packet->vps;
 768
 769         DEBUG("rlm_ldap: Entering ldap_groupcmp()");
 770
 771         if (check->strvalue == NULL || check->length == 0){
 772                 DEBUG("rlm_ldap::ldap_groupcmp: Illegal group name");
 773                 return 1;
 774         }
 775
 776         if (req == NULL){
 777                 DEBUG("rlm_ldap::ldap_groupcmp: NULL request");
 778                 return 1;
 779         }
 780
 781         if (!radius_xlat(basedn, sizeof(basedn), inst->basedn, req, NULL)) {
 782                 DEBUG("rlm_ldap::ldap_groupcmp: unable to create basedn.");
 783                 return 1;
 784         }
 785
 786         while((vp_user_dn = pairfind(*request_pairs, PW_LDAP_USERDN)) == NULL){
 787                 char            *user_dn = NULL;
 788
 789                 if (!radius_xlat(filter, sizeof(filter), inst->filter,
 790                                         req, ldap_escape_func)){
 791                         DEBUG("rlm_ldap::ldap_groupcmp: unable to create filter");
 792                         return 1;
 793                 }
 794                 if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
 795                         radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
 796                         return 1;
 797                 }
 798                 if ((res = perform_search(inst, conn, basedn, LDAP_SCOPE_SUBTREE,
 799                                         filter, attrs, &result)) != RLM_MODULE_OK){
 800                         DEBUG("rlm_ldap::ldap_groupcmp: search failed");
 801                         ldap_release_conn(conn_id,inst->conns);
 802                         return 1;
 803                 }
 804                 if ((msg = ldap_first_entry(conn->ld, result)) == NULL) {
 805                         DEBUG("rlm_ldap::ldap_groupcmp: ldap_first_entry() failed");
 806                         ldap_release_conn(conn_id,inst->conns);
 807                         ldap_msgfree(result);
 808                         return 1;
 809                 }
 810                 if ((user_dn = ldap_get_dn(conn->ld, msg)) == NULL) {
 811                         DEBUG("rlm_ldap:ldap_groupcmp:: ldap_get_dn() failed");
 812                         ldap_release_conn(conn_id,inst->conns);
 813                         ldap_msgfree(result);
 814                         return 1;
 815                 }
 816                 ldap_release_conn(conn_id,inst->conns);
 817                 /*
 818                 * Adding new attribute containing DN for LDAP object associated with
 819                 * given username
 820                 */
 821                 pairadd(request_pairs, pairmake("Ldap-UserDn", user_dn, T_OP_EQ));
 822                 ldap_memfree(user_dn);
 823                 ldap_msgfree(result);
 824         }
 825
 826         if(!radius_xlat(gr_filter, sizeof(gr_filter), inst->groupmemb_filt, req, NULL)){
 827                 DEBUG("rlm_ldap::ldap_groupcmp: unable to create filter.");
 828                 return 1;
 829         }
 830
 831         if (strchr((char *)check->strvalue,',') != NULL) {
 832                 /* This looks like a DN */
 833                 snprintf(filter,sizeof(filter), "%s",gr_filter);
 834                 snprintf(basedn,sizeof(basedn), "%s",(char *)check->strvalue);
 835         } else
 836                 snprintf(filter,sizeof(filter), "(&(%s=%s)%s)",inst->groupname_attr,(char *)check->strvalue,gr_filter);
 837
 838         if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
 839                 radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
 840                 return 1;
 841         }
 842
 843         if ((res = perform_search(inst, conn, basedn, LDAP_SCOPE_SUBTREE,
 844                                 filter, attrs, &result)) == RLM_MODULE_OK){
 845                 DEBUG("rlm_ldap::ldap_groupcmp: User found in group %s",
 846                                 (char *)check->strvalue);
 847                 ldap_msgfree(result);
 848                 ldap_release_conn(conn_id,inst->conns);
 849                 return 0;
 850         }
 851
 852         ldap_release_conn(conn_id,inst->conns);
 853
 854         if (res != RLM_MODULE_NOTFOUND ) {
 855                 DEBUG("rlm_ldap::ldap_groupcmp: Search returned error");
 856                 return 1;
 857         }
 858
 859         if (inst->groupmemb_attr == NULL){
 860                 /* search returned NOTFOUND and searching for membership
 861                  * using user object attributes is not specified in config
 862                  * file
 863                  */
 864                 DEBUG("rlm_ldap::ldap_groupcmp: Group %s not found or user is not a member.",(char *)check->strvalue);
 865                 return 1;
 866         }
 867
 868         snprintf(filter,sizeof(filter), "(objectclass=*)");
 869         if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
 870                 radlog(L_ERR, "rlm_ldap: Add ldap connections are in use");
 871                 return 1;
 872         }
 873         if ((res = perform_search(inst, conn, vp_user_dn->strvalue, LDAP_SCOPE_BASE,
 874                                         filter, group_attrs,&result)) != RLM_MODULE_OK){
 875                 DEBUG("rlm_ldap::ldap_groupcmp: Search returned error");
 876                 ldap_release_conn(conn_id, inst->conns);
 877                 return 1;
 878         }
 879
 880         if ((msg = ldap_first_entry(conn->ld, result)) == NULL) {
 881                 DEBUG("rlm_ldap::ldap_groupcmp: ldap_first_entry() failed");
 882                 ldap_release_conn(conn_id,inst->conns);
 883                 ldap_msgfree(result);
 884                 return 1;
 885         }
 886         if ((vals = ldap_get_values(conn->ld, msg, inst->groupmemb_attr)) != NULL) {
 887                 unsigned int i = 0;
 888                 char found = 0;
 889                 for (;i < ldap_count_values(vals);i++){
 890                         if (strchr(vals[i],',') != NULL){
 891                                 /* This looks like a DN */
 892                                 LDAPMessage *gr_result = NULL;
 893                                 snprintf(filter,sizeof(filter), "(%s=%s)",
 894                                         inst->groupname_attr,
 895                                         (char *)check->strvalue);
 896                                 if ((res = perform_search(inst, conn, vals[i],
 897                                                 LDAP_SCOPE_BASE, filter,
 898                                                 attrs, &gr_result)) != RLM_MODULE_OK){
 899                                         if (res != RLM_MODULE_NOTFOUND){
 900                                                 DEBUG("rlm_ldap::ldap_groupcmp: \
 901                                                         Search returned error");
 902                                                 ldap_value_free(vals);
 903                                                 ldap_msgfree(result);
 904                                                 ldap_release_conn(conn_id,inst->conns);
 905                                                 return 1;
 906                                         }
 907                                 } else {
 908                                         ldap_msgfree(gr_result);
 909                                         found = 1;
 910                                         break;
 911                                 }
 912                         } else {
 913                                 if (strcmp(vals[i],(char *)check->strvalue) == 0){
 914                                         found = 1;
 915                                         break;
 916                                 }
 917                         }
 918                 }
 919                 ldap_value_free(vals);
 920                 ldap_msgfree(result);
 921                 if (found == 0){
 922                         DEBUG("rlm_ldap::groupcmp: Group %s not found \
 923                                 or user not a member",
 924                                 (char *)check->strvalue);
 925                         ldap_release_conn(conn_id,inst->conns);
 926                         return 1;
 927                 }
 928         } else {
 929                         DEBUG("rlm_ldap::ldap_groupcmp: ldap_get_values() failed");
 930                         ldap_msgfree(result);
 931                         ldap_release_conn(conn_id,inst->conns);
 932                         return 1;
 933         }
 934
 935         DEBUG("rlm_ldap::ldap_groupcmp: User found in group %s",(char *)check->strvalue);
 936         ldap_release_conn(conn_id,inst->conns);
 937
 938         return 0;
 939 }
 940
 941 /*
 942  * ldap_xlat()
 943  * Do an xlat on an LDAP URL
 944  */
 945
 946 static int ldap_xlat(void *instance, REQUEST *request, char *fmt, char *out, int freespace,
 947                                 RADIUS_ESCAPE_STRING func)
 948 {
 949         char url[MAX_FILTER_STR_LEN];
 950         int res;
 951         int ret = 0;
 952         ldap_instance *inst = instance;
 953         LDAPURLDesc *ldap_url;
 954         LDAPMessage *result = NULL;
 955         LDAPMessage *msg = NULL;
 956         char **vals;
 957         int conn_id = -1;
 958         LDAP_CONN *conn;
 959
 960         DEBUG("rlm_ldap: - ldap_xlat");
 961         if (!radius_xlat(url, sizeof(url), fmt, request, func)) {
 962                 radlog (L_ERR, "rlm_ldap: Unable to create LDAP URL.\n");
 963                 return 0;
 964         }
 965         if (!ldap_is_ldap_url(url)){
 966                 radlog (L_ERR, "rlm_ldap: String passed does not look like an LDAP URL.\n");
 967                 return 0;
 968         }
 969         if (ldap_url_parse(url,&ldap_url)){
 970                 radlog (L_ERR, "rlm_ldap: LDAP URL parse failed.\n");
 971                 return 0;
 972         }
 973         if (ldap_url->lud_attrs == NULL || ldap_url->lud_attrs[0] == NULL || \
 974                 ( ldap_url->lud_attrs[1] != NULL || ( ! strlen(ldap_url->lud_attrs[0]) || \
 975                 ! strcmp(ldap_url->lud_attrs[0],"*") ) ) ){
 976                 radlog (L_ERR, "rlm_ldap: Invalid Attribute(s) request.\n");
 977                 ldap_free_urldesc(ldap_url);
 978                 return 0;
 979         }
 980         if (ldap_url->lud_host){
 981                 if (strncmp(inst->server,ldap_url->lud_host,strlen(inst->server)) != 0 || \
 982                                 ldap_url->lud_port != inst->port){
 983                         DEBUG("rlm_ldap: Requested server/port is not known to this module instance.");
 984                         ldap_free_urldesc(ldap_url);
 985                         return 0;
 986                 }
 987         }
 988         if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
 989                 radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
 990                 ldap_free_urldesc(ldap_url);
 991                 return 0;
 992         }
 993         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){
 994                 if (res == RLM_MODULE_NOTFOUND){
 995                         DEBUG("rlm_ldap: Search returned not found");
 996                         ldap_free_urldesc(ldap_url);
 997                         ldap_release_conn(conn_id,inst->conns);
 998                         return 0;
 999                 }
1000                 DEBUG("rlm_ldap: Search returned error");
1001                 ldap_free_urldesc(ldap_url);
1002                 ldap_release_conn(conn_id,inst->conns);
1003                 return 0;
1004         }
1005         if ((msg = ldap_first_entry(conn->ld, result)) == NULL){
1006                 DEBUG("rlm_ldap: ldap_first_entry() failed");
1007                 ldap_msgfree(result);
1008                 ldap_free_urldesc(ldap_url);
1009                 ldap_release_conn(conn_id,inst->conns);
1010                 return 0;
1011         }
1012         if ((vals = ldap_get_values(conn->ld, msg, ldap_url->lud_attrs[0])) != NULL) {
1013                 ret = strlen(vals[0]);
1014                 if (ret > freespace){
1015                         DEBUG("rlm_ldap: Insufficient string space");
1016                         ldap_free_urldesc(ldap_url);
1017                         ldap_value_free(vals);
1018                         ldap_msgfree(result);
1019                         ldap_release_conn(conn_id,inst->conns);
1020                         return 0;
1021                 }
1022                 DEBUG("rlm_ldap: Adding attribute %s, value: %s",ldap_url->lud_attrs[0],vals[0]);
1023                 strncpy(out,vals[0],ret);
1024                 ldap_value_free(vals);
1025         }
1026         else
1027                 ret = 0;
1028
1029         ldap_msgfree(result);
1030         ldap_free_urldesc(ldap_url);
1031         ldap_release_conn(conn_id,inst->conns);
1032
1033         DEBUG("rlm_ldap: - ldap_xlat end");
1034
1035         return ret;
1036 }
1037
1038
1039 /******************************************************************************
1040  *
1041  *      Function: rlm_ldap_authorize
1042  *
1043  *      Purpose: Check if user is authorized for remote access
1044  *
1045  ******************************************************************************/
1046 static int
1047 ldap_authorize(void *instance, REQUEST * request)
1048 {
1049         LDAPMessage     *result = NULL;
1050         LDAPMessage     *msg = NULL;
1051         LDAPMessage     *def_msg = NULL;
1052         LDAPMessage     *def_attr_msg = NULL;
1053         LDAPMessage     *def_result = NULL;
1054         LDAPMessage     *def_attr_result = NULL;
1055         ldap_instance   *inst = instance;
1056         char            *user_dn = NULL;
1057         char            filter[MAX_FILTER_STR_LEN];
1058         char            basedn[MAX_FILTER_STR_LEN];
1059         VALUE_PAIR      *check_tmp;
1060         VALUE_PAIR      *reply_tmp;
1061         int             res;
1062         VALUE_PAIR      **check_pairs, **reply_pairs;
1063         char            **vals;
1064         VALUE_PAIR      *module_fmsg_vp;
1065         VALUE_PAIR      *user_profile;
1066         char            module_fmsg[MAX_STRING_LEN];
1067         LDAP_CONN       *conn;
1068         int             conn_id = -1;
1069
1070         DEBUG("rlm_ldap: - authorize");
1071
1072         if (!request->username){
1073                 radlog(L_AUTH, "rlm_ldap: Attribute \"User-Name\" is required for authentication.\n");
1074                 return RLM_MODULE_INVALID;
1075         }
1076
1077         check_pairs = &request->config_items;
1078         reply_pairs = &request->reply->vps;
1079
1080         /*
1081          * Check for valid input, zero length names not permitted
1082          */
1083         if (request->username->strvalue == 0) {
1084                 radlog(L_ERR, "rlm_ldap: zero length username not permitted\n");
1085                 return RLM_MODULE_INVALID;
1086         }
1087         DEBUG("rlm_ldap: performing user authorization for %s",
1088                request->username->strvalue);
1089
1090         if (!radius_xlat(filter, sizeof(filter), inst->filter,
1091                          request, ldap_escape_func)) {
1092                 radlog (L_ERR, "rlm_ldap: unable to create filter.\n");
1093                 return RLM_MODULE_INVALID;
1094         }
1095
1096         if (!radius_xlat(basedn, sizeof(basedn), inst->basedn,
1097                          request, NULL)) {
1098                 radlog (L_ERR, "rlm_ldap: unable to create basedn.\n");
1099                 return RLM_MODULE_INVALID;
1100         }
1101
1102         if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
1103                 radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
1104                 return RLM_MODULE_FAIL;
1105         }
1106         if ((res = perform_search(instance, conn, basedn, LDAP_SCOPE_SUBTREE, filter, inst->atts, &result)) != RLM_MODULE_OK) {
1107                 DEBUG("rlm_ldap: search failed");
1108                 if (res == RLM_MODULE_NOTFOUND){
1109                         snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: User not found");
1110                         module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1111                         pairadd(&request->packet->vps, module_fmsg_vp);
1112                 }
1113                 ldap_release_conn(conn_id,inst->conns);
1114                 return (res);
1115         }
1116         if ((msg = ldap_first_entry(conn->ld, result)) == NULL) {
1117                 DEBUG("rlm_ldap: ldap_first_entry() failed");
1118                 ldap_msgfree(result);
1119                 ldap_release_conn(conn_id,inst->conns);
1120                 return RLM_MODULE_FAIL;
1121         }
1122         if ((user_dn = ldap_get_dn(conn->ld, msg)) == NULL) {
1123                 DEBUG("rlm_ldap: ldap_get_dn() failed");
1124                 ldap_msgfree(result);
1125                 ldap_release_conn(conn_id,inst->conns);
1126                 return RLM_MODULE_FAIL;
1127         }
1128         /*
1129          * Adding new attribute containing DN for LDAP object associated with
1130          * given username
1131          */
1132         pairadd(&request->packet->vps, pairmake("Ldap-UserDn", user_dn, T_OP_EQ));
1133         ldap_memfree(user_dn);
1134
1135
1136         /* Remote access is controled by attribute of the user object */
1137         if (inst->access_attr) {
1138                 if ((vals = ldap_get_values(conn->ld, msg, inst->access_attr)) != NULL) {
1139                         if (inst->default_allow){
1140                                 DEBUG("rlm_ldap: checking if remote access for %s is allowed by %s", request->username->strvalue, inst->access_attr);
1141                                 if (!strncmp(vals[0], "FALSE", 5)) {
1142                                         DEBUG("rlm_ldap: dialup access disabled");
1143                                         snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Access Attribute denies access");
1144                                         module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1145                                         pairadd(&request->packet->vps, module_fmsg_vp);
1146                                         ldap_msgfree(result);
1147                                         ldap_value_free(vals);
1148                                         ldap_release_conn(conn_id,inst->conns);
1149                                         return RLM_MODULE_USERLOCK;
1150                                 }
1151                                 ldap_value_free(vals);
1152                         }
1153                         else{
1154                                 DEBUG("rlm_ldap: %s attribute exists - access denied by default", inst->access_attr);
1155                                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Access Attribute denies access");
1156                                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1157                                 pairadd(&request->packet->vps, module_fmsg_vp);
1158                                 ldap_msgfree(result);
1159                                 ldap_value_free(vals);
1160                                 ldap_release_conn(conn_id,inst->conns);
1161                                 return RLM_MODULE_USERLOCK;
1162                         }
1163                 } else {
1164                         if (inst->default_allow){
1165                                 DEBUG("rlm_ldap: no %s attribute - access denied by default", inst->access_attr);
1166                                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Access Attribute denies access");
1167                                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1168                                 pairadd(&request->packet->vps, module_fmsg_vp);
1169                                 ldap_msgfree(result);
1170                                 ldap_release_conn(conn_id,inst->conns);
1171                                 return RLM_MODULE_USERLOCK;
1172                         }
1173                 }
1174         }
1175
1176         /*
1177          * Check for the default profile entry. If it exists then add the
1178          * attributes it contains in the check and reply pairs
1179          */
1180
1181         user_profile = pairfind(request->config_items, PW_USER_PROFILE);
1182         if (inst->default_profile || user_profile){
1183                 char *profile = inst->default_profile;
1184
1185                 strNcpy(filter,inst->base_filter,sizeof(filter));
1186                 if (user_profile)
1187                         profile = user_profile->strvalue;
1188                 if (profile && strlen(profile)){
1189                         if ((res = perform_search(instance, conn,
1190                                 profile, LDAP_SCOPE_BASE,
1191                                 filter, inst->atts, &def_result)) == RLM_MODULE_OK){
1192                                 if ((def_msg = ldap_first_entry(conn->ld,def_result))){
1193                                         if ((check_tmp = ldap_pairget(conn->ld,def_msg,inst->check_item_map,check_pairs,1))) {
1194                                                 if (inst->do_xlat){
1195                                                         pairxlatmove(request, check_pairs, &check_tmp);
1196                                                         pairfree(&check_tmp);
1197                                                 }
1198                                                 else
1199                                                         pairadd(check_pairs,check_tmp);
1200                                         }
1201                                         if ((reply_tmp = ldap_pairget(conn->ld,def_msg,inst->reply_item_map,reply_pairs,0))) {
1202                                                 if (inst->do_xlat){
1203                                                         pairxlatmove(request, reply_pairs, &reply_tmp);
1204                                                         pairfree(&reply_tmp);
1205                                                 }
1206                                                 else
1207                                                         pairadd(reply_pairs,reply_tmp);
1208                                         }
1209                                 }
1210                                 ldap_msgfree(def_result);
1211                         } else
1212                                 DEBUG("rlm_ldap: default_profile/user-profile search failed");
1213                 }
1214         }
1215
1216         /*
1217          * Check for the profile attribute. If it exists, we assume that it
1218          * contains the DN of an entry containg a profile for the user. That
1219          * way we can have different general profiles for various user groups
1220          * (students,faculty,staff etc)
1221          */
1222
1223         if (inst->profile_attr){
1224                 if ((vals = ldap_get_values(conn->ld, msg, inst->profile_attr)) != NULL) {
1225                         unsigned int i=0;
1226                         strNcpy(filter,inst->base_filter,sizeof(filter));
1227                         while(vals[i] != NULL && strlen(vals[i])){
1228                                 if ((res = perform_search(instance, conn,
1229                                         vals[i], LDAP_SCOPE_BASE,
1230                                         filter, inst->atts, &def_attr_result)) == RLM_MODULE_OK){
1231                                         if ((def_attr_msg = ldap_first_entry(conn->ld,def_attr_result))){
1232                                                 if ((check_tmp = ldap_pairget(conn->ld,def_attr_msg,inst->check_item_map,check_pairs,1))) {
1233                                                         if (inst->do_xlat){
1234                                                                 pairxlatmove(request, check_pairs, &check_tmp);
1235                                                                 pairfree(&check_tmp);
1236                                                         }
1237                                                         else
1238                                                                 pairadd(check_pairs,check_tmp);
1239                                                 }
1240                                                 if ((reply_tmp = ldap_pairget(conn->ld,def_attr_msg,inst->reply_item_map,reply_pairs,0))) {
1241                                                         if (inst->do_xlat){
1242                                                                 pairxlatmove(request, reply_pairs, &reply_tmp);
1243                                                                 pairfree(&reply_tmp);
1244                                                         }
1245                                                         else
1246                                                                 pairadd(reply_pairs,reply_tmp);
1247                                                 }
1248                                         }
1249                                         ldap_msgfree(def_attr_result);
1250                                 } else
1251                                         DEBUG("rlm_ldap: profile_attribute search failed");
1252                                 i++;
1253                         }
1254                         ldap_value_free(vals);
1255                 }
1256         }
1257         if (inst->passwd_attr && strlen(inst->passwd_attr)){
1258                 VALUE_PAIR *passwd_item;
1259
1260                 if ((passwd_item = pairfind(request->config_items, PW_PASSWORD)) == NULL){
1261                         char **passwd_vals;
1262                         char *passwd_val = NULL;
1263                         int passwd_len;
1264
1265                         if ((passwd_vals = ldap_get_values(conn->ld,msg,inst->passwd_attr)) != NULL){
1266                                 unsigned int i=0;
1267                                 while(passwd_vals[i] != NULL){
1268                                         if (strlen(passwd_vals[i])){
1269                                                 passwd_val = passwd_vals[i];
1270
1271                                                 if (inst->passwd_hdr && strlen(inst->passwd_hdr)){
1272                                                         passwd_val = strstr(passwd_val,inst->passwd_hdr);
1273                                                         if (passwd_val != NULL)
1274                                                                 passwd_val += strlen(inst->passwd_hdr);
1275                                                         else
1276                                                                 DEBUG("rlm_ldap: Password header not found in password %s for user %s", passwd_vals[0],request->username->strvalue);
1277                                                 }
1278                                                 if (passwd_val){
1279                                                         if ((passwd_item = paircreate(PW_PASSWORD,PW_TYPE_STRING)) == NULL){
1280                                                                 radlog(L_ERR|L_CONS, "no memory");
1281                                                                 ldap_value_free(passwd_vals);
1282                                                                 ldap_msgfree(result);
1283                                                                 ldap_release_conn(conn_id,inst->conns);
1284                                                                 return RLM_MODULE_FAIL;
1285                                                         }
1286                                                         passwd_len = strlen(passwd_val);
1287                                                         strncpy(passwd_item->strvalue,passwd_val,MAX_STRING_LEN - 1);
1288                                                         passwd_item->length = (passwd_len > (MAX_STRING_LEN - 1)) ? (MAX_STRING_LEN - 1) : passwd_len;
1289                                                         pairadd(&request->config_items,passwd_item);
1290                                                         DEBUG("rlm_ldap: Added password %s in check items",passwd_item->strvalue);
1291                                                 }
1292                                         }
1293                                         i++;
1294                                 }
1295                                 ldap_value_free(passwd_vals);
1296                         }
1297                 }
1298         }
1299
1300
1301
1302         DEBUG("rlm_ldap: looking for check items in directory...");
1303
1304         if ((check_tmp = ldap_pairget(conn->ld, msg, inst->check_item_map,check_pairs,1)) != NULL) {
1305                 if (inst->do_xlat){
1306                         pairxlatmove(request, check_pairs, &check_tmp);
1307                         pairfree(&check_tmp);
1308                 }
1309                 else
1310                         pairadd(check_pairs,check_tmp);
1311         }
1312
1313
1314         DEBUG("rlm_ldap: looking for reply items in directory...");
1315
1316
1317         if ((reply_tmp = ldap_pairget(conn->ld, msg, inst->reply_item_map,reply_pairs,0)) != NULL) {
1318                 if (inst->do_xlat){
1319                         pairxlatmove(request, reply_pairs, &reply_tmp);
1320                         pairfree(&reply_tmp);
1321                 }
1322                 else
1323                         pairadd(reply_pairs,reply_tmp);
1324         }
1325
1326        if (inst->do_comp && paircmp(request,request->packet->vps,*check_pairs,reply_pairs) != 0){
1327                 DEBUG("rlm_ldap: Pairs do not match. Rejecting user.");
1328                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Pairs do not match");
1329                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1330                 pairadd(&request->packet->vps, module_fmsg_vp);
1331                 ldap_msgfree(result);
1332                 ldap_release_conn(conn_id,inst->conns);
1333
1334                 return RLM_MODULE_REJECT;
1335         }
1336
1337         /*
1338          * Module should default to LDAP authentication if no Auth-Type
1339          * specified
1340          */
1341         if (pairfind(*check_pairs, PW_AUTHTYPE) == NULL)
1342                 pairadd(check_pairs, pairmake("Auth-Type", "LDAP", T_OP_EQ));
1343
1344
1345         DEBUG("rlm_ldap: user %s authorized to use remote access",
1346               request->username->strvalue);
1347         ldap_msgfree(result);
1348         ldap_release_conn(conn_id,inst->conns);
1349
1350         return RLM_MODULE_OK;
1351 }
1352
1353 /*****************************************************************************
1354  *
1355  *      Function: rlm_ldap_authenticate
1356  *
1357  *      Purpose: Check the user's password against ldap database
1358  *
1359  *****************************************************************************/
1360 static int
1361 ldap_authenticate(void *instance, REQUEST * request)
1362 {
1363         LDAP           *ld_user;
1364         LDAPMessage    *result, *msg;
1365         ldap_instance  *inst = instance;
1366         char           *user_dn, *attrs[] = {"uid", NULL};
1367         char            filter[MAX_FILTER_STR_LEN];
1368         char            basedn[MAX_FILTER_STR_LEN];
1369         int             res;
1370         VALUE_PAIR     *vp_user_dn;
1371         VALUE_PAIR      *module_fmsg_vp;
1372         char            module_fmsg[MAX_STRING_LEN];
1373         LDAP_CONN       *conn;
1374         int             conn_id = -1;
1375
1376         DEBUG("rlm_ldap: - authenticate");
1377
1378         /*
1379          * Ensure that we're being passed a plain-text password, and not
1380          * anything else.
1381          */
1382
1383         if (!request->username) {
1384                 radlog(L_AUTH, "rlm_ldap: Attribute \"User-Name\" is required for authentication.\n");
1385                 return RLM_MODULE_INVALID;
1386         }
1387
1388         if (!request->password){
1389                 radlog(L_AUTH, "rlm_ldap: Attribute \"User-Password\" is required for authentication.");
1390                 return RLM_MODULE_INVALID;
1391         }
1392
1393         if(request->password->attribute != PW_PASSWORD) {
1394                 radlog(L_AUTH, "rlm_ldap: Attribute \"User-Password\" is required for authentication. Cannot use \"%s\".", request->password->name);
1395                 return RLM_MODULE_INVALID;
1396         }
1397
1398         if (request->password->length == 0) {
1399                 radlog(L_ERR, "rlm_ldap: empty password supplied");
1400                 return RLM_MODULE_INVALID;
1401         }
1402
1403         /*
1404          * Check that we don't have any failed connections. If we do there's no real need
1405          * of runing. Also give it another chance if we have a lot of failed connections.
1406          */
1407         if (inst->failed_conns > MAX_FAILED_CONNS_END)
1408                 inst->failed_conns = 0;
1409         if (inst->failed_conns > MAX_FAILED_CONNS_START){
1410                 inst->failed_conns++;
1411                 return RLM_MODULE_FAIL;
1412         }
1413
1414
1415         DEBUG("rlm_ldap: login attempt by \"%s\" with password \"%s\"",
1416                request->username->strvalue, request->password->strvalue);
1417
1418         while((vp_user_dn = pairfind(request->packet->vps, PW_LDAP_USERDN)) == NULL) {
1419                 if (!radius_xlat(filter, sizeof(filter), inst->filter,
1420                                 request, NULL)) {
1421                         radlog (L_ERR, "rlm_ldap: unable to create filter.\n");
1422                         return RLM_MODULE_INVALID;
1423                 }
1424
1425                 if (!radius_xlat(basedn, sizeof(basedn), inst->basedn,
1426                                 request, NULL)) {
1427                         radlog (L_ERR, "rlm_ldap: unable to create basedn.\n");
1428                         return RLM_MODULE_INVALID;
1429                 }
1430
1431                 if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
1432                         radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
1433                         return RLM_MODULE_FAIL;
1434                 }
1435                 if ((res = perform_search(instance, conn, basedn, LDAP_SCOPE_SUBTREE, filter, attrs, &result)) != RLM_MODULE_OK) {
1436                         if (res == RLM_MODULE_NOTFOUND){
1437                                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: User not found");
1438                                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1439                                 pairadd(&request->packet->vps, module_fmsg_vp);
1440                         }
1441                         ldap_release_conn(conn_id,inst->conns);
1442                         return (res);
1443                 }
1444                 if ((msg = ldap_first_entry(conn->ld, result)) == NULL) {
1445                         ldap_msgfree(result);
1446                         ldap_release_conn(conn_id,inst->conns);
1447                         return RLM_MODULE_FAIL;
1448                 }
1449                 if ((user_dn = ldap_get_dn(conn->ld, msg)) == NULL) {
1450                         DEBUG("rlm_ldap: ldap_get_dn() failed");
1451                         ldap_msgfree(result);
1452                         ldap_release_conn(conn_id,inst->conns);
1453                         return RLM_MODULE_FAIL;
1454                 }
1455                 ldap_release_conn(conn_id,inst->conns);
1456                 pairadd(&request->packet->vps, pairmake("Ldap-UserDn", user_dn, T_OP_EQ));
1457                 ldap_memfree(user_dn);
1458                 ldap_msgfree(result);
1459         }
1460
1461         user_dn = vp_user_dn->strvalue;
1462
1463         DEBUG("rlm_ldap: user DN: %s", user_dn);
1464
1465         ld_user = ldap_connect(instance, user_dn, request->password->strvalue,
1466                                1, &res);
1467         if (ld_user == NULL){
1468                 if (res == RLM_MODULE_REJECT){
1469                         inst->failed_conns = 0;
1470                         snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Bind as user failed");
1471                         module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1472                         pairadd(&request->packet->vps, module_fmsg_vp);
1473                 }
1474                 if (res == RLM_MODULE_FAIL){
1475                         DEBUG("rlm_ldap: ldap_connect() failed");
1476                         inst->failed_conns++;
1477                 }
1478                 return (res);
1479         }
1480
1481         DEBUG("rlm_ldap: user %s authenticated succesfully",
1482               request->username->strvalue);
1483         ldap_unbind_s(ld_user);
1484         inst->failed_conns = 0;
1485
1486         return RLM_MODULE_OK;
1487 }
1488
1489 static LDAP    *
1490 ldap_connect(void *instance, const char *dn, const char *password, int auth, int *result)
1491 {
1492         ldap_instance  *inst = instance;
1493         LDAP           *ld = NULL;
1494         int             msgid, rc, ldap_version;
1495         int             ldap_errno = 0;
1496         LDAPMessage    *res;
1497
1498         if (inst->is_url){
1499 #ifdef HAVE_LDAP_INITIALIZE
1500                 DEBUG("rlm_ldap: (re)connect to %s, authentication %d", inst->server, auth);
1501                 if (ldap_initialize(&ld, inst->server) != LDAP_SUCCESS) {
1502                         radlog(L_ERR, "rlm_ldap: ldap_initialize() failed");
1503                         *result = RLM_MODULE_FAIL;
1504                         return (NULL);
1505                 }
1506 #endif
1507         }
1508         else{
1509                 DEBUG("rlm_ldap: (re)connect to %s:%d, authentication %d", inst->server, inst->port, auth);
1510                 if ((ld = ldap_init(inst->server, inst->port)) == NULL) {
1511                         radlog(L_ERR, "rlm_ldap: ldap_init() failed");
1512                         *result = RLM_MODULE_FAIL;
1513                         return (NULL);
1514                 }
1515         }
1516         if (ldap_set_option(ld, LDAP_OPT_NETWORK_TIMEOUT, (void *) &(inst->net_timeout)) != LDAP_OPT_SUCCESS) {
1517                 radlog(L_ERR, "rlm_ldap: Could not set LDAP_OPT_NETWORK_TIMEOUT %ld.%ld", inst->net_timeout.tv_sec, inst->net_timeout.tv_usec);
1518         }
1519         if (ldap_set_option(ld, LDAP_OPT_TIMELIMIT, (void *) &(inst->timelimit)) != LDAP_OPT_SUCCESS) {
1520                 radlog(L_ERR, "rlm_ldap: Could not set LDAP_OPT_TIMELIMIT %d", inst->timelimit);
1521         }
1522         if (inst->ldap_debug && ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, &(inst->ldap_debug)) != LDAP_OPT_SUCCESS) {
1523                 radlog(L_ERR, "rlm_ldap: Could not set LDAP_OPT_DEBUG_LEVEL %d", inst->ldap_debug);
1524         }
1525         ldap_version = LDAP_VERSION3;
1526         if (ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &ldap_version) != LDAP_OPT_SUCCESS) {
1527                 radlog(L_ERR, "rlm_ldap: Could not set LDAP version to V3");
1528         }
1529 #ifdef HAVE_LDAP_START_TLS
1530         if(inst->tls_mode) {
1531                 DEBUG("rlm_ldap: setting TLS mode to %d", inst->tls_mode);
1532                 if(ldap_set_option(ld, LDAP_OPT_X_TLS,
1533                            (void *) &(inst->tls_mode)) != LDAP_OPT_SUCCESS) {
1534                         ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
1535                         radlog(L_ERR, "rlm_ldap: could not set LDAP_OPT_X_TLS option %s", ldap_err2string(ldap_errno));
1536                 }
1537         }
1538
1539         if(inst->tls_cacertfile != NULL) {
1540                 DEBUG("rlm_ldap: setting TLS CACert File to %s", inst->tls_cacertfile);
1541
1542                 if ( ldap_set_option( NULL, LDAP_OPT_X_TLS_CACERTFILE,
1543                                                           (void *) inst->tls_cacertfile )
1544                          != LDAP_OPT_SUCCESS) {
1545                         radlog(L_ERR, "rlm_ldap: could not set "
1546                                    "LDAP_OPT_X_TLS_CACERTFILE option to %s", inst->tls_cacertfile);
1547                 }
1548         }
1549
1550         if(inst->tls_cacertdir != NULL) {
1551                 DEBUG("rlm_ldap: setting TLS CACert File to %s", inst->tls_cacertdir);
1552
1553                 if ( ldap_set_option( NULL, LDAP_OPT_X_TLS_CACERTDIR,
1554                                                           (void *) inst->tls_cacertdir )
1555                          != LDAP_OPT_SUCCESS) {
1556                         radlog(L_ERR, "rlm_ldap: could not set "
1557                                    "LDAP_OPT_X_TLS_CACERTDIR option to %s", inst->tls_cacertdir);
1558                 }
1559         }
1560
1561         if( strcmp( TLS_DEFAULT_VERIFY, inst->tls_require_cert ) != 0 ) {
1562                 DEBUG("rlm_ldap: setting TLS Require Cert to %s",
1563                           inst->tls_require_cert);
1564         }
1565
1566
1567 #ifdef HAVE_INT_TLS_CONFIG
1568
1569         if ( ldap_int_tls_config( NULL, LDAP_OPT_X_TLS_REQUIRE_CERT,
1570                                                           (inst->tls_require_cert) )
1571                  != LDAP_OPT_SUCCESS) {
1572                 radlog(L_ERR, "rlm_ldap: could not set "
1573                            "LDAP_OPT_X_TLS_REQUIRE_CERT option to %s",
1574                            inst->tls_require_cert);
1575         }
1576
1577 #endif
1578
1579         if(inst->tls_certfile != NULL) {
1580                 DEBUG("rlm_ldap: setting TLS Cert File to %s", inst->tls_certfile);
1581
1582                 if ( ldap_set_option( NULL, LDAP_OPT_X_TLS_CERTFILE,
1583                                                           (void *) inst->tls_certfile )
1584                          != LDAP_OPT_SUCCESS) {
1585                         radlog(L_ERR, "rlm_ldap: could not set "
1586                                    "LDAP_OPT_X_TLS_CERTFILE option to %s",
1587                                    inst->tls_certfile);
1588                 }
1589         }
1590
1591         if(inst->tls_keyfile != NULL) {
1592                 DEBUG("rlm_ldap: setting TLS Key File to %s", inst->tls_keyfile);
1593
1594                 if ( ldap_set_option( NULL, LDAP_OPT_X_TLS_KEYFILE,
1595                                                           (void *) inst->tls_keyfile )
1596                          != LDAP_OPT_SUCCESS) {
1597                         radlog(L_ERR, "rlm_ldap: could not set "
1598                                    "LDAP_OPT_X_TLS_KEYFILE option to %s",
1599                                    inst->tls_keyfile);
1600                 }
1601         }
1602
1603         if(inst->tls_randfile != NULL) {
1604                 DEBUG("rlm_ldap: setting TLS Key File to %s", inst->tls_randfile);
1605
1606                 if ( ldap_set_option( NULL, LDAP_OPT_X_TLS_RANDOM_FILE,
1607                                                           (void *) inst->tls_randfile )
1608                          != LDAP_OPT_SUCCESS) {
1609                         radlog(L_ERR, "rlm_ldap: could not set "
1610                                    "LDAP_OPT_X_TLS_RANDOM_FILE option to %s",
1611                                    inst->tls_randfile);
1612                 }
1613         }
1614         if (inst->start_tls) {
1615                 DEBUG("rlm_ldap: starting TLS");
1616                 rc = ldap_start_tls_s(ld, NULL, NULL);
1617                 if (rc != LDAP_SUCCESS) {
1618                         DEBUG("rlm_ldap: ldap_start_tls_s()");
1619                         ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
1620                         radlog(L_ERR, "rlm_ldap: could not start TLS %s", ldap_err2string(ldap_errno));
1621                         *result = RLM_MODULE_FAIL;
1622                         ldap_unbind_s(ld);
1623                         return (NULL);
1624                 }
1625         }
1626 #endif /* HAVE_LDAP_START_TLS */
1627
1628         if (inst->is_url){
1629                 DEBUG("rlm_ldap: bind as %s/%s to %s", dn, password, inst->server);
1630         }
1631         else{
1632                 DEBUG("rlm_ldap: bind as %s/%s to %s:%d", dn, password, inst->server, inst->port);
1633         }
1634         msgid = ldap_bind(ld, dn, password,LDAP_AUTH_SIMPLE);
1635         if (msgid == -1) {
1636                 ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
1637                 if (inst->is_url)
1638                         radlog(L_ERR, "rlm_ldap: %s bind to %s failed: %s",
1639                                 dn, inst->server, ldap_err2string(ldap_errno));
1640                 else
1641                         radlog(L_ERR, "rlm_ldap: %s bind to %s:%d failed: %s",
1642                                 dn, inst->server, inst->port,
1643                                 ldap_err2string(ldap_errno));
1644                 *result = RLM_MODULE_FAIL;
1645                 ldap_unbind_s(ld);
1646                 return (NULL);
1647         }
1648         DEBUG("rlm_ldap: waiting for bind result ...");
1649
1650         rc = ldap_result(ld, msgid, 1, &(inst->timeout), &res);
1651
1652         if(rc < 1) {
1653                 DEBUG("rlm_ldap: ldap_result()");
1654                 ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
1655                 if (inst->is_url)
1656                         radlog(L_ERR, "rlm_ldap: %s bind to %s failed: %s",
1657                                 dn, inst->server, (rc == 0) ? "timeout" : ldap_err2string(ldap_errno));
1658                 else
1659                         radlog(L_ERR, "rlm_ldap: %s bind to %s:%d failed: %s",
1660                                 dn, inst->server, inst->port,
1661                                 (rc == 0) ? "timeout" : ldap_err2string(ldap_errno));
1662                 *result = RLM_MODULE_FAIL;
1663                 ldap_unbind_s(ld);
1664                 return (NULL);
1665         }
1666         ldap_errno = ldap_result2error(ld, res, 1);
1667         switch (ldap_errno) {
1668         case LDAP_SUCCESS:
1669                 DEBUG("rlm_ldap: Bind was successful");
1670                 *result = RLM_MODULE_OK;
1671                 break;
1672
1673         case LDAP_INVALID_CREDENTIALS:
1674                 if (auth){
1675                         DEBUG("rlm_ldap: Bind failed with invalid credentials");
1676                         *result = RLM_MODULE_REJECT;
1677                 }
1678                 else {
1679                         radlog(L_ERR, "rlm_ldap: LDAP login failed: check login, password settings in ldap section of radiusd.conf");
1680                         *result = RLM_MODULE_FAIL;
1681                 }
1682                 break;
1683
1684         default:
1685                 if (inst->is_url)
1686                         radlog(L_ERR,"rlm_ldap: %s bind to %s failed %s",
1687                                 dn, inst->server, ldap_err2string(ldap_errno));
1688                 else
1689                         radlog(L_ERR,"rlm_ldap: %s bind to %s:%d failed %s",
1690                                 dn, inst->server, inst->port,
1691                                 ldap_err2string(ldap_errno));
1692                 *result = RLM_MODULE_FAIL;
1693         }
1694
1695         if (*result != RLM_MODULE_OK) {
1696                 ldap_unbind_s(ld);
1697                 ld = NULL;
1698         }
1699         return ld;
1700 }
1701
1702 /*****************************************************************************
1703  *
1704  *      Detach from the LDAP server and cleanup internal state.
1705  *
1706  *****************************************************************************/
1707 static int
1708 ldap_detach(void *instance)
1709 {
1710         ldap_instance  *inst = instance;
1711         TLDAP_RADIUS *pair, *nextpair;
1712
1713         if (inst->server)
1714                 free((char *) inst->server);
1715         if (inst->login)
1716                 free((char *) inst->login);
1717         if (inst->password)
1718                 free((char *) inst->password);
1719         if (inst->basedn)
1720                 free((char *) inst->basedn);
1721         if (inst->dictionary_mapping)
1722                 free(inst->dictionary_mapping);
1723         if (inst->filter)
1724                 free((char *) inst->filter);
1725         if (inst->base_filter)
1726                 free((char *) inst->base_filter);
1727         if (inst->passwd_hdr)
1728                 free((char *) inst->passwd_hdr);
1729         if (inst->passwd_attr)
1730                 free((char *) inst->passwd_attr);
1731         if (inst->groupname_attr)
1732                 free((char *) inst->groupname_attr);
1733         if (inst->groupmemb_filt)
1734                 free((char *) inst->groupmemb_filt);
1735         if (inst->groupmemb_attr)
1736                 free((char *) inst->groupmemb_attr);
1737         if (inst->access_attr)
1738                 free((char *) inst->access_attr);
1739         if (inst->profile_attr)
1740                 free((char *) inst->profile_attr);
1741         if (inst->conns){
1742                 int i=0;
1743
1744                 for(;i<inst->num_conns;i++){
1745                         if (inst->conns[i].ld){
1746                                 ldap_unbind_s(inst->conns[i].ld);
1747                         }
1748                         pthread_mutex_destroy(&inst->conns[i].mutex);
1749                 }
1750                 free(inst->conns);
1751         }
1752
1753         pair = inst->check_item_map;
1754
1755         while (pair != NULL) {
1756                 nextpair = pair->next;
1757                 free(pair->attr);
1758                 free(pair->radius_attr);
1759                 free(pair);
1760                 pair = nextpair;
1761         }
1762
1763         pair = inst->reply_item_map;
1764
1765         while (pair != NULL) {
1766                 nextpair = pair->next;
1767                 free(pair->attr);
1768                 free(pair->radius_attr);
1769                 free(pair);
1770                 pair = nextpair;
1771         }
1772
1773         if (inst->atts)
1774                 free(inst->atts);
1775
1776         paircompare_unregister(PW_LDAP_GROUP, ldap_groupcmp);
1777         xlat_unregister(inst->xlat_name,ldap_xlat);
1778         free(inst->xlat_name);
1779
1780         free(inst);
1781
1782         return 0;
1783 }
1784
1785 #ifdef FIELDCPY
1786 static void
1787 fieldcpy(char *string, char **uptr)
1788 {
1789         char           *ptr;
1790
1791         ptr = *uptr;
1792         while (*ptr == ' ' || *ptr == '\t') {
1793                 ptr++;
1794         }
1795         if (*ptr == '"') {
1796                 ptr++;
1797                 while (*ptr != '"' && *ptr != '\0' && *ptr != '\n') {
1798                         *string++ = *ptr++;
1799                 }
1800                 *string = '\0';
1801                 if (*ptr == '"') {
1802                         ptr++;
1803                 }
1804                 *uptr = ptr;
1805                 return;
1806         }
1807         while (*ptr != ' ' && *ptr != '\t' && *ptr != '\0' && *ptr != '\n' &&
1808                *ptr != '=' && *ptr != ',') {
1809                 *string++ = *ptr++;
1810         }
1811         *string = '\0';
1812         *uptr = ptr;
1813         return;
1814 }
1815 #endif
1816 /*****************************************************************************
1817  *      Get RADIUS attributes from LDAP object
1818  *      ( according to draft-adoba-radius-05.txt
1819  *        <http://www.ietf.org/internet-drafts/draft-adoba-radius-05.txt> )
1820  *
1821  *****************************************************************************/
1822
1823 static VALUE_PAIR *
1824 ldap_pairget(LDAP * ld, LDAPMessage * entry,
1825              TLDAP_RADIUS * item_map, VALUE_PAIR **pairs,char is_check)
1826 {
1827         char          **vals;
1828         int             vals_count;
1829         int             vals_idx;
1830         char           *ptr;
1831         TLDAP_RADIUS   *element;
1832         LRAD_TOKEN      token;
1833         int             is_generic_attribute;
1834         char            value[256];
1835         VALUE_PAIR     *pairlist = NULL;
1836         VALUE_PAIR     *newpair = NULL;
1837
1838         /* check if there is a mapping from this LDAP attribute to a RADIUS attribute */
1839         for (element = item_map; element != NULL; element = element->next) {
1840         if ((vals = ldap_get_values(ld,entry,element->attr)) != NULL){
1841                         /* check whether this is a one-to-one-mapped ldap attribute or a generic
1842                            attribute and set flag accordingly */
1843
1844                         if (strcasecmp(element->radius_attr, GENERIC_ATTRIBUTE_ID)==0)
1845                                 is_generic_attribute = 1;
1846                         else
1847                                 is_generic_attribute = 0;
1848
1849                         /* find out how many values there are for the attribute and extract all of them */
1850
1851                         vals_count = ldap_count_values(vals);
1852
1853                         for (vals_idx = 0; vals_idx < vals_count; vals_idx++) {
1854                                 ptr = vals[vals_idx];
1855
1856                                 if (is_generic_attribute) {
1857                                         /* this is a generic attribute */
1858                                         LRAD_TOKEN dummy; /* makes pairread happy */
1859
1860                                         /* not sure if using pairread here is ok ... */
1861                                         if ( (newpair = pairread(&ptr, &dummy)) != NULL) {
1862                                                 DEBUG("rlm_ldap: extracted attribute %s from generic item %s",
1863                                                       newpair->name, vals[vals_idx]);
1864                                                 pairadd(&pairlist, newpair);
1865                                         } else {
1866                                                 radlog(L_ERR, "rlm_ldap: parsing %s failed: %s",
1867                                                        element->attr, vals[vals_idx]);
1868                                         }
1869                                 } else {
1870                                         /* this is a one-to-one-mapped attribute */
1871                                         token = gettoken(&ptr, value, sizeof(value) - 1);
1872                                         if (token < T_EQSTART || token > T_EQEND) {
1873                                                 token = (is_check) ? T_OP_CMP_EQ : T_OP_EQ;
1874                                         } else {
1875                                                 gettoken(&ptr, value, sizeof(value) - 1);
1876                                         }
1877                                         if (value[0] == 0) {
1878                                                 DEBUG("rlm_ldap: Attribute %s has no value", element->attr);
1879                                                 break;
1880                                         }
1881                                         DEBUG("rlm_ldap: Adding %s as %s, value %s & op=%d", element->attr, element->radius_attr, value, token);
1882                                                 if ((newpair = pairmake(element->radius_attr, value, token)) == NULL)
1883                                                 continue;
1884                                         if (! vals_idx){
1885                                                 pairdelete(pairs,newpair->attribute);
1886                                         }
1887                                         pairadd(&pairlist, newpair);
1888                                 }
1889                         }
1890                         ldap_value_free(vals);
1891                 }
1892         }
1893
1894         return (pairlist);
1895 }
1896
1897 /* globally exported name */
1898 module_t        rlm_ldap = {
1899         "LDAP",
1900         RLM_TYPE_THREAD_SAFE,   /* type: reserved        */
1901         NULL,                   /* initialization        */
1902         ldap_instantiate,       /* instantiation         */
1903         {
1904                 ldap_authenticate,      /* authentication        */
1905                 ldap_authorize,         /* authorization         */
1906                 NULL,                   /* preaccounting         */
1907                 NULL,                   /* accounting            */
1908                 NULL,                   /* checksimul            */
1909                 NULL,                   /* pre-proxy             */
1910                 NULL,                   /* post-proxy            */
1911                 NULL                    /* post-auth             */
1912         },
1913         ldap_detach,            /* detach                */
1914         NULL,                   /* destroy               */
1915 };