src/modules/rlm_ldap/rlm_ldap.c

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