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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  *
  18  *   Copyright 2004,2006 The FreeRADIUS Server Project.
  19  */
  20
  21 #include <freeradius-devel/ident.h>
  22 RCSID("$Id$")
  23
  24 #include <freeradius-devel/radiusd.h>
  25 #include <freeradius-devel/modules.h>
  26 #include        <freeradius-devel/rad_assert.h>
  27
  28 #include        <pwd.h>
  29 #include        <ctype.h>
  30
  31 #include        <lber.h>
  32 #include        <ldap.h>
  33
  34 #ifndef HAVE_PTHREAD_H
  35 /*
  36  *      This is a lot simpler than putting ifdef's around
  37  *      every use of the pthread functions.
  38  */
  39 #define pthread_mutex_lock(a)
  40 #define pthread_mutex_trylock(a) (0)
  41 #define pthread_mutex_unlock(a)
  42 #define pthread_mutex_init(a,b)
  43 #define pthread_mutex_destroy(a)
  44 #else
  45 #include        <pthread.h>
  46 #endif
  47
  48
  49 #define MAX_FILTER_STR_LEN      1024
  50 #define TIMELIMIT 5
  51
  52 /*
  53  * These are used in case ldap_search returns LDAP_SERVER_DOWN
  54  * In that case we do conn->failed_conns++ and then check it:
  55  * If conn->failed_conns <= MAX_FAILED_CONNS_START then we try
  56  * to reconnect
  57  * conn->failed_conns is also checked on entrance in perform_search:
  58  * If conn->failed_conns > MAX_FAILED_CONNS_START then we don't
  59  * try to do anything and we just do conn->failed_conns++ and
  60  * return RLM_MODULE_FAIL
  61  * if conn->failed_conns >= MAX_FAILED_CONNS_END then we give it
  62  * another chance and we set it to MAX_FAILED_CONNS_RESTART and
  63  * try to reconnect.
  64  *
  65  *
  66  * We are assuming that the majority of the LDAP_SERVER_DOWN cases
  67  * will either be an ldap connection timeout or a temporary ldap
  68  * server problem.
  69  * As a result we make a few attempts to reconnect hoping that the problem
  70  * will soon go away. If it does not go away then we just return
  71  * RLM_MODULE_FAIL on entrance in perform_search until conn->failed_conns
  72  * gets to MAX_FAILED_CONNS_END. After that we give it one more chance by
  73  * going back to MAX_FAILED_CONNS_RESTART
  74  *
  75  */
  76
  77 #define MAX_FAILED_CONNS_END            20
  78 #define MAX_FAILED_CONNS_RESTART        4
  79 #define MAX_FAILED_CONNS_START          5
  80
  81 #ifdef NOVELL_UNIVERSAL_PASSWORD
  82
  83 /* Universal Password Length */
  84 #define UNIVERSAL_PASS_LEN 256
  85
  86 int nmasldap_get_password(
  87         LDAP     *ld,
  88         char     *objectDN,
  89         size_t   *pwdSize,      /* in bytes */
  90         char     *pwd );
  91
  92 #endif
  93
  94 #ifdef NOVELL
  95
  96 #define REQUEST_ACCEPTED   0
  97 #define REQUEST_CHALLENGED 1
  98 #define REQUEST_REJECTED   2
  99 #define MAX_CHALLENGE_LEN  128
 100
 101 int radLdapXtnNMASAuth( LDAP *, char *, char *, char *, char *, size_t *, char *, int * );
 102
 103 #endif
 104
 105 /* linked list of mappings between RADIUS attributes and LDAP attributes */
 106 struct TLDAP_RADIUS {
 107         char*                 attr;
 108         char*                 radius_attr;
 109         FR_TOKEN              operator;
 110         struct TLDAP_RADIUS*  next;
 111 };
 112 typedef struct TLDAP_RADIUS TLDAP_RADIUS;
 113
 114 typedef struct ldap_conn {
 115         LDAP            *ld;
 116         char            bound;
 117         char            locked;
 118         int             failed_conns;
 119 #ifdef HAVE_PTHREAD_H
 120         pthread_mutex_t mutex;
 121 #endif
 122 } LDAP_CONN;
 123
 124 typedef struct {
 125         char           *server;
 126         int             port;
 127         int             timelimit;
 128         struct timeval  net_timeout;
 129         struct timeval  timeout;
 130         int             debug;
 131         int             tls_mode;
 132         int             start_tls;
 133         int             num_conns;
 134         int             do_comp;
 135         int             do_xlat;
 136         int             default_allow;
 137         int             failed_conns;
 138         int             is_url;
 139         char           *login;
 140         char           *password;
 141         char           *filter;
 142         char           *base_filter;
 143         char           *basedn;
 144         char           *default_profile;
 145         char           *profile_attr;
 146         char           *access_attr;
 147         char           *passwd_hdr;
 148         char           *passwd_attr;
 149         int             auto_header;
 150         char           *dictionary_mapping;
 151         char           *groupname_attr;
 152         char           *groupmemb_filt;
 153         char           *groupmemb_attr;
 154         char            **atts;
 155         TLDAP_RADIUS   *check_item_map;
 156         TLDAP_RADIUS   *reply_item_map;
 157         LDAP_CONN       *conns;
 158 #ifdef NOVELL
 159         LDAP_CONN *apc_conns;
 160 #endif
 161         int             ldap_debug; /* Debug flag for LDAP SDK */
 162         char            *xlat_name; /* name used to xlat */
 163         char            *tls_cacertfile;
 164         char            *tls_cacertdir;
 165         char            *tls_certfile;
 166         char            *tls_keyfile;
 167         char            *tls_randfile;
 168         char            *tls_require_cert;
 169 #ifdef NOVELL
 170         int              edir_account_policy_check;
 171 #endif
 172         int              set_auth_type;
 173 }  ldap_instance;
 174
 175 /* The default setting for TLS Certificate Verification */
 176 #define TLS_DEFAULT_VERIFY "allow"
 177
 178 static CONF_PARSER tls_config[] = {
 179         {"start_tls", PW_TYPE_BOOLEAN,
 180          offsetof(ldap_instance,start_tls), NULL, "no"},
 181         {"cacertfile", PW_TYPE_FILENAME,
 182          offsetof(ldap_instance,tls_cacertfile), NULL, NULL},
 183         {"cacertdir", PW_TYPE_FILENAME,
 184          offsetof(ldap_instance,tls_cacertdir), NULL, NULL},
 185         {"certfile", PW_TYPE_FILENAME,
 186          offsetof(ldap_instance,tls_certfile), NULL, NULL},
 187         {"keyfile", PW_TYPE_FILENAME,
 188          offsetof(ldap_instance,tls_keyfile), NULL, NULL},
 189         {"randfile", PW_TYPE_STRING_PTR, /* OK if it changes on HUP */
 190          offsetof(ldap_instance,tls_randfile), NULL, NULL},
 191         {"require_cert", PW_TYPE_STRING_PTR,
 192          offsetof(ldap_instance,tls_require_cert), NULL, TLS_DEFAULT_VERIFY},
 193         { NULL, -1, 0, NULL, NULL }
 194 };
 195
 196 static const CONF_PARSER module_config[] = {
 197         {"server", PW_TYPE_STRING_PTR,
 198          offsetof(ldap_instance,server), NULL, "localhost"},
 199         {"port", PW_TYPE_INTEGER,
 200          offsetof(ldap_instance,port), NULL, "389"},
 201         {"password", PW_TYPE_STRING_PTR,
 202          offsetof(ldap_instance,password), NULL, ""},
 203         {"identity", PW_TYPE_STRING_PTR,
 204          offsetof(ldap_instance,login), NULL, ""},
 205
 206         /*
 207          *      Timeouts & stuff.
 208          */
 209         /* wait forever on network activity */
 210         {"net_timeout", PW_TYPE_INTEGER,
 211          offsetof(ldap_instance,net_timeout.tv_sec), NULL, "10"},
 212         /* wait forever for search results */
 213         {"timeout", PW_TYPE_INTEGER,
 214          offsetof(ldap_instance,timeout.tv_sec), NULL, "20"},
 215         /* allow server unlimited time for search (server-side limit) */
 216         {"timelimit", PW_TYPE_INTEGER,
 217          offsetof(ldap_instance,timelimit), NULL, "20"},
 218
 219         /*
 220          *      TLS configuration  The first few are here for backwards
 221          *      compatibility.  The last is the new subsection.
 222          */
 223         {"tls_mode", PW_TYPE_BOOLEAN,
 224          offsetof(ldap_instance,tls_mode), NULL, "no"},
 225
 226         {"start_tls", PW_TYPE_BOOLEAN,
 227          offsetof(ldap_instance,start_tls), NULL, "no"},
 228         {"tls_cacertfile", PW_TYPE_FILENAME,
 229          offsetof(ldap_instance,tls_cacertfile), NULL, NULL},
 230         {"tls_cacertdir", PW_TYPE_FILENAME,
 231          offsetof(ldap_instance,tls_cacertdir), NULL, NULL},
 232         {"tls_certfile", PW_TYPE_FILENAME,
 233          offsetof(ldap_instance,tls_certfile), NULL, NULL},
 234         {"tls_keyfile", PW_TYPE_FILENAME,
 235          offsetof(ldap_instance,tls_keyfile), NULL, NULL},
 236         {"tls_randfile", PW_TYPE_STRING_PTR, /* OK if it changes on HUP */
 237          offsetof(ldap_instance,tls_randfile), NULL, NULL},
 238         {"tls_require_cert", PW_TYPE_STRING_PTR,
 239          offsetof(ldap_instance,tls_require_cert), NULL, TLS_DEFAULT_VERIFY},
 240         { "tls", PW_TYPE_SUBSECTION, 0, NULL, (const void *) tls_config },
 241
 242         /*
 243          *      DN's and filters.
 244          */
 245         {"basedn", PW_TYPE_STRING_PTR,
 246          offsetof(ldap_instance,basedn), NULL, "o=notexist"},
 247         {"filter", PW_TYPE_STRING_PTR,
 248          offsetof(ldap_instance,filter), NULL, "(uid=%u)"},
 249         {"base_filter", PW_TYPE_STRING_PTR,
 250          offsetof(ldap_instance,base_filter), NULL, "(objectclass=radiusprofile)"},
 251         {"default_profile", PW_TYPE_STRING_PTR,
 252          offsetof(ldap_instance,default_profile), NULL, NULL},
 253         {"profile_attribute", PW_TYPE_STRING_PTR,
 254          offsetof(ldap_instance,profile_attr), NULL, NULL},
 255
 256         /*
 257          *      Getting passwords from the database
 258          */
 259         {"password_header", PW_TYPE_STRING_PTR,
 260          offsetof(ldap_instance,passwd_hdr), NULL, NULL},
 261         {"password_attribute", PW_TYPE_STRING_PTR,
 262          offsetof(ldap_instance,passwd_attr), NULL, NULL},
 263         {"auto_header", PW_TYPE_BOOLEAN,
 264          offsetof(ldap_instance,auto_header), NULL, "no"},
 265
 266         /*
 267          *      Access limitations
 268          */
 269         /* LDAP attribute name that controls remote access */
 270         {"access_attr", PW_TYPE_STRING_PTR,
 271          offsetof(ldap_instance,access_attr), NULL, NULL},
 272         {"access_attr_used_for_allow", PW_TYPE_BOOLEAN,
 273          offsetof(ldap_instance,default_allow), NULL, "yes"},
 274
 275         /*
 276          *      Group checks.  These could probably be done
 277          *      via dynamic xlat's.
 278          */
 279         {"groupname_attribute", PW_TYPE_STRING_PTR,
 280          offsetof(ldap_instance,groupname_attr), NULL, "cn"},
 281         {"groupmembership_filter", PW_TYPE_STRING_PTR,
 282          offsetof(ldap_instance,groupmemb_filt), NULL, "(|(&(objectClass=GroupOfNames)(member=%{Ldap-UserDn}))(&(objectClass=GroupOfUniqueNames)(uniquemember=%{Ldap-UserDn})))"},
 283         {"groupmembership_attribute", PW_TYPE_STRING_PTR,
 284          offsetof(ldap_instance,groupmemb_attr), NULL, NULL},
 285
 286         /* file with mapping between LDAP and RADIUS attributes */
 287         {"dictionary_mapping", PW_TYPE_FILENAME,
 288          offsetof(ldap_instance,dictionary_mapping), NULL, "${confdir}/ldap.attrmap"},
 289
 290         /*
 291          *      Debugging flags to the server
 292          */
 293         {"ldap_debug", PW_TYPE_INTEGER,
 294          offsetof(ldap_instance,ldap_debug), NULL, "0x0000"},
 295         {"ldap_connections_number", PW_TYPE_INTEGER,
 296          offsetof(ldap_instance,num_conns), NULL, "5"},
 297         {"compare_check_items", PW_TYPE_BOOLEAN,
 298          offsetof(ldap_instance,do_comp), NULL, "no"},
 299         {"do_xlat", PW_TYPE_BOOLEAN,
 300          offsetof(ldap_instance,do_xlat), NULL, "yes"},
 301
 302 #ifdef NOVELL
 303         /*
 304          *      Novell magic.
 305          */
 306         {"edir_account_policy_check", PW_TYPE_BOOLEAN,
 307          offsetof(ldap_instance,edir_account_policy_check), NULL, "yes"},
 308 #endif
 309
 310         {"set_auth_type", PW_TYPE_BOOLEAN, offsetof(ldap_instance,set_auth_type), NULL, "yes"},
 311         {NULL, -1, 0, NULL, NULL}
 312 };
 313
 314 #define ld_valid                ld_options.ldo_valid
 315 #define LDAP_VALID_SESSION      0x2
 316 #define LDAP_VALID(ld)  ( (ld)->ld_valid == LDAP_VALID_SESSION )
 317
 318 #ifdef FIELDCPY
 319 static void     fieldcpy(char *, char **);
 320 #endif
 321 static VALUE_PAIR *ldap_pairget(LDAP *, LDAPMessage *, TLDAP_RADIUS *,VALUE_PAIR **,int);
 322 static int ldap_groupcmp(void *, REQUEST *, VALUE_PAIR *, VALUE_PAIR *, VALUE_PAIR *, VALUE_PAIR **);
 323 static int ldap_xlat(void *, REQUEST *, char *, char *, size_t, RADIUS_ESCAPE_STRING);
 324 static LDAP    *ldap_connect(void *instance, const char *, const char *, int, int *, char **);
 325 static int     read_mappings(ldap_instance* inst);
 326
 327 static inline int ldap_get_conn(LDAP_CONN *conns,LDAP_CONN **ret,void *instance)
 328 {
 329         ldap_instance *inst = instance;
 330         register int i = 0;
 331
 332         for(i=0;i<inst->num_conns;i++){
 333                 DEBUG("rlm_ldap: ldap_get_conn: Checking Id: %d",i);
 334                 if ((pthread_mutex_trylock(&conns[i].mutex) == 0)) {
 335                         if (conns[i].locked == 1) {
 336                                 /* connection is already being used */
 337                                 pthread_mutex_unlock(&(conns[i].mutex));
 338                                 continue;
 339                         }
 340                         /* found an unused connection */
 341                         *ret = &conns[i];
 342                         conns[i].locked = 1;
 343                         DEBUG("rlm_ldap: ldap_get_conn: Got Id: %d",i);
 344                         return i;
 345                 }
 346         }
 347
 348         return -1;
 349 }
 350
 351 static inline void ldap_release_conn(int i, LDAP_CONN *conns)
 352 {
 353         DEBUG("rlm_ldap: ldap_release_conn: Release Id: %d",i);
 354         conns[i].locked = 0;
 355         pthread_mutex_unlock(&(conns[i].mutex));
 356 }
 357
 358 /*************************************************************************
 359  *
 360  *      Function: rlm_ldap_instantiate
 361  *
 362  *      Purpose: Uses section of radiusd config file passed as parameter
 363  *               to create an instance of the module.
 364  *
 365  *************************************************************************/
 366 static int
 367 ldap_instantiate(CONF_SECTION * conf, void **instance)
 368 {
 369         ldap_instance  *inst;
 370         int i = 0;
 371         int atts_num = 0;
 372         int reply_map_num = 0;
 373         int check_map_num = 0;
 374         int att_map[3] = {0,0,0};
 375         TLDAP_RADIUS *pair;
 376         ATTR_FLAGS flags;
 377         const char *xlat_name;
 378
 379         inst = rad_malloc(sizeof *inst);
 380         if (!inst) {
 381                 return -1;
 382         }
 383         memset(inst, 0, sizeof(*inst));
 384
 385         if (cf_section_parse(conf, inst, module_config) < 0) {
 386                 free(inst);
 387                 return -1;
 388         }
 389
 390         if (inst->server == NULL) {
 391                 radlog(L_ERR, "rlm_ldap: missing 'server' directive.");
 392                 free(inst);     /* FIXME: detach */
 393                 return -1;
 394         }
 395         inst->is_url = 0;
 396         if (ldap_is_ldap_url(inst->server)){
 397 #ifdef HAVE_LDAP_INITIALIZE
 398                 inst->is_url = 1;
 399                 inst->port = 0;
 400 #else
 401                 radlog(L_ERR, "rlm_ldap: 'server' directive is in URL form but ldap_initialize() is not available.");
 402                 free(inst);     /* FIXME: detach */
 403                 return -1;
 404 #endif
 405         }
 406
 407         inst->timeout.tv_usec = 0;
 408         inst->net_timeout.tv_usec = 0;
 409         /* workaround for servers which support LDAPS but not START TLS */
 410         if(inst->port == LDAPS_PORT || inst->tls_mode)
 411                 inst->tls_mode = LDAP_OPT_X_TLS_HARD;
 412         else
 413                 inst->tls_mode = 0;
 414         inst->reply_item_map = NULL;
 415         inst->check_item_map = NULL;
 416         inst->conns = NULL;
 417         inst->failed_conns = 0;
 418
 419         DEBUG("rlm_ldap: Registering ldap_groupcmp for Ldap-Group");
 420         paircompare_register(PW_LDAP_GROUP, PW_USER_NAME, ldap_groupcmp, inst);
 421         memset(&flags, 0, sizeof(flags));
 422
 423         xlat_name = cf_section_name2(conf);
 424         if (xlat_name != NULL){
 425                 char *group_name;
 426                 DICT_ATTR *dattr;
 427
 428                 /*
 429                  * Allocate room for <instance>-Ldap-Group
 430                  */
 431                 group_name = rad_malloc((strlen(xlat_name) + 1 + 11) * sizeof(char));
 432                 sprintf(group_name,"%s-Ldap-Group",xlat_name);
 433                 DEBUG("rlm_ldap: Creating new attribute %s",group_name);
 434                 dict_addattr(group_name, 0, PW_TYPE_STRING, -1, flags);
 435                 dattr = dict_attrbyname(group_name);
 436                 if (dattr == NULL){
 437                         radlog(L_ERR, "rlm_ldap: Failed to create attribute %s",group_name);
 438                         free(group_name);
 439                         free(inst);     /* FIXME: detach */
 440                         return -1;
 441                 }
 442                 DEBUG("rlm_ldap: Registering ldap_groupcmp for %s",group_name);
 443                 paircompare_register(dattr->attr, PW_USER_NAME, ldap_groupcmp, inst);
 444                 free(group_name);
 445         }
 446         else {
 447                 xlat_name = cf_section_name1(conf);
 448                 rad_assert(xlat_name != NULL); /* or all hell breaks loose */
 449         }
 450         inst->xlat_name = strdup(xlat_name);
 451         DEBUG("rlm_ldap: Registering ldap_xlat with xlat_name %s",xlat_name);
 452         xlat_register(xlat_name,ldap_xlat,inst);
 453
 454         /*
 455          *      Over-ride set_auth_type if there's no Auth-Type of our name.
 456          *      This automagically catches the case where LDAP is listed
 457          *      in "authorize", but not "authenticate".
 458          */
 459         if (inst->set_auth_type) {
 460                 DICT_VALUE *dv = dict_valbyname(PW_AUTH_TYPE, xlat_name);
 461                 if (!dv) {
 462                         DEBUG2("rlm_ldap: Over-riding set_auth_type, as we're not listed in the \"authenticate\" section.");
 463                         inst->set_auth_type = 0;
 464                 }
 465         } /* else no need to look up the value */
 466
 467 #ifdef NOVELL
 468         /*
 469          *      (LDAP_Instance, V1) attribute-value pair in the config
 470          *      items list means that the 'authorize' method of the
 471          *      instance 'V1' of the LDAP module has processed this
 472          *      request.
 473          */
 474         dict_addattr("LDAP-Instance", 0, PW_TYPE_STRING, -1, flags);
 475
 476         /*
 477          *      ('eDir-APC', '1') in config items list
 478          *      Do not perform eDirectory account policy check (APC)
 479          *
 480          *      ('eDir-APC', '2') in config items list
 481          *      Perform eDirectory APC
 482          *
 483          *      ('eDir-APC', '3') in config items list
 484          *      eDirectory APC has been completed
 485          */
 486         dict_addattr("eDir-APC", 0, PW_TYPE_STRING, -1, flags);
 487         /*
 488          *      eDir-Auth-Option allows for a different NMAS Authentication method to be used instead of password
 489          */
 490         dict_addattr("eDir-Auth-Option", 0, PW_TYPE_STRING, -1, flags);
 491 #endif
 492
 493         if (inst->num_conns <= 0){
 494                 radlog(L_ERR, "rlm_ldap: Invalid ldap connections number passed.");
 495                 free(inst);     /* FIXME: detach */
 496                 return -1;
 497         }
 498         inst->conns = malloc(sizeof(*(inst->conns))*inst->num_conns);
 499         if (inst->conns == NULL){
 500                 radlog(L_ERR, "rlm_ldap: Could not allocate memory. Aborting.");
 501                 free(inst);     /* FIXME: detach */
 502                 return -1;
 503         }
 504         for(i = 0; i < inst->num_conns; i++){
 505                 inst->conns[i].bound = 0;
 506                 inst->conns[i].locked = 0;
 507                 inst->conns[i].failed_conns = 0;
 508                 inst->conns[i].ld = NULL;
 509                 pthread_mutex_init(&inst->conns[i].mutex, NULL);
 510         }
 511
 512 #ifdef NOVELL
 513         /*
 514          *      'inst->apc_conns' is a separate connection pool to be
 515          *      used for performing eDirectory account policy check in
 516          *      the 'postauth' method. This avoids changing the
 517          *      (RADIUS server) credentials associated with the
 518          *      'inst->conns' connection pool.
 519          */
 520         inst->apc_conns = malloc(sizeof(*(inst->apc_conns))*inst->num_conns);
 521         if (inst->apc_conns == NULL){
 522                 radlog(L_ERR, "rlm_ldap: Could not allocate memory. Aborting.");
 523                 free(inst);     /* FIXME: detach */
 524                 return -1;
 525         }
 526         for(i = 0; i < inst->num_conns; i++){
 527                 inst->apc_conns[i].bound = 0;
 528                 inst->apc_conns[i].locked = 0;
 529                 inst->apc_conns[i].failed_conns = 0;
 530                 inst->apc_conns[i].ld = NULL;
 531                 pthread_mutex_init(&inst->apc_conns[i].mutex, NULL);
 532         }
 533 #endif
 534
 535         if (read_mappings(inst) != 0) {
 536                 radlog(L_ERR, "rlm_ldap: Reading dictionary mappings from file %s failed",
 537                        inst->dictionary_mapping);
 538                 free(inst);     /* FIXME: detach */
 539                 return -1;
 540         }
 541         if ((inst->check_item_map == NULL) &&
 542             (inst->reply_item_map == NULL)) {
 543                 radlog(L_ERR, "rlm_ldap: dictionary mappings file %s did not contain any mappings",
 544                         inst->dictionary_mapping);
 545                 free(inst);     /* FIXME: detach */
 546                 return -1;
 547         }
 548
 549         pair = inst->check_item_map;
 550         while(pair != NULL){
 551                 atts_num++;
 552                 pair = pair->next;
 553         }
 554         check_map_num = (atts_num - 1);
 555         pair = inst->reply_item_map;
 556         while(pair != NULL){
 557                 atts_num++;
 558                 pair = pair->next;
 559         }
 560         reply_map_num = (atts_num - 1);
 561         if (inst->profile_attr)
 562                 atts_num++;
 563         if (inst->passwd_attr)
 564                 atts_num++;
 565         if (inst->access_attr)
 566                 atts_num++;
 567 #ifdef NOVELL
 568                 atts_num++;     /* eDirectory Authentication Option attribute */
 569 #endif
 570         inst->atts = (char **)malloc(sizeof(char *)*(atts_num + 1));
 571         if (inst->atts == NULL){
 572                 radlog(L_ERR, "rlm_ldap: Could not allocate memory. Aborting.");
 573                 free(inst);     /* FIXME: detach */
 574                 return -1;
 575         }
 576         pair = inst->check_item_map;
 577         if (pair == NULL)
 578                 pair = inst->reply_item_map;
 579 #ifdef NOVELL
 580         for(i=0;i<atts_num - 1;i++){
 581 #else
 582         for(i=0;i<atts_num;i++){
 583 #endif
 584                 if (i <= check_map_num ){
 585                         inst->atts[i] = pair->attr;
 586                         if (i == check_map_num)
 587                                 pair = inst->reply_item_map;
 588                         else
 589                                 pair = pair->next;
 590                 }
 591                 else if (i <= reply_map_num){
 592                         inst->atts[i] = pair->attr;
 593                         pair = pair->next;
 594                 }
 595                 else{
 596                         if (inst->profile_attr && !att_map[0]){
 597                                 inst->atts[i] = inst->profile_attr;
 598                                 att_map[0] = 1;
 599                         }
 600                         else if (inst->passwd_attr && !att_map[1]){
 601                                 inst->atts[i] = inst->passwd_attr;
 602                                 att_map[1] = 1;
 603                         }
 604                         else if (inst->access_attr && !att_map[2]){
 605                                 inst->atts[i] = inst->access_attr;
 606                                 att_map[2] = 1;
 607                         }
 608                 }
 609         }
 610 #ifdef NOVELL
 611         inst->atts[atts_num - 1] = "sasdefaultloginsequence";
 612 #endif
 613         inst->atts[atts_num] = NULL;
 614
 615         DEBUG("conns: %p",inst->conns);
 616
 617         *instance = inst;
 618
 619
 620         return 0;
 621 }
 622
 623
 624 /*
 625  *      read_mappings(...) reads a ldap<->radius mappings file to
 626  *      inst->reply_item_map and inst->check_item_map
 627  */
 628 #define MAX_LINE_LEN 160
 629 #define GENERIC_ATTRIBUTE_ID "$GENERIC$"
 630
 631 static int
 632 read_mappings(ldap_instance* inst)
 633 {
 634         FILE* mapfile;
 635         char *filename;
 636
 637         /*
 638          *      All buffers are of MAX_LINE_LEN so we can use sscanf
 639          *      without being afraid of buffer overflows
 640          */
 641         char buf[MAX_LINE_LEN], itemType[MAX_LINE_LEN];
 642         char radiusAttribute[MAX_LINE_LEN], ldapAttribute[MAX_LINE_LEN];
 643         int linenumber;
 644         FR_TOKEN operator;
 645         char opstring[MAX_LINE_LEN];
 646
 647         /* open the mappings file for reading */
 648
 649         filename = inst->dictionary_mapping;
 650         DEBUG("rlm_ldap: reading ldap<->radius mappings from file %s", filename);
 651         mapfile = fopen(filename, "r");
 652
 653         if (mapfile == NULL) {
 654                 radlog(L_ERR, "rlm_ldap: Opening file %s failed: %s",
 655                        filename, strerror(errno));
 656                 return -1; /* error */
 657         }
 658
 659         /*
 660          *      read file line by line. Note that if line length
 661          *      exceeds MAX_LINE_LEN, line numbers will be mixed up
 662          */
 663         linenumber = 0;
 664
 665         while (fgets(buf, sizeof buf, mapfile)!=NULL) {
 666                 char* ptr;
 667                 int token_count;
 668                 TLDAP_RADIUS* pair;
 669
 670                 linenumber++;
 671
 672                 /* strip comments */
 673                 ptr = strchr(buf, '#');
 674                 if (ptr) *ptr = 0;
 675
 676                 /* empty line */
 677                 if (buf[0] == 0) continue;
 678
 679                 /* extract tokens from the string */
 680                 token_count = sscanf(buf, "%s %s %s %s",
 681                                      itemType, radiusAttribute,
 682                                      ldapAttribute, opstring);
 683
 684                 if (token_count <= 0) /* no tokens */
 685                         continue;
 686
 687                 if ((token_count < 3) || (token_count > 4)) {
 688                         radlog(L_ERR, "rlm_ldap: Skipping %s line %i: %s",
 689                                filename, linenumber, buf);
 690                         radlog(L_ERR, "rlm_ldap: Expected 3 to 4 tokens "
 691                                "(Item type, RADIUS Attribute and LDAP Attribute) but found only %i", token_count);
 692                         continue;
 693                 }
 694
 695                 if (token_count == 3) {
 696                         operator = T_OP_INVALID; /* use defaults */
 697                 } else {
 698                         char *ptr;
 699
 700                         ptr = opstring;
 701                         operator = gettoken(&ptr, buf, sizeof(buf));
 702                         if ((operator < T_OP_ADD) || (operator > T_OP_CMP_EQ)) {
 703                                 radlog(L_ERR, "rlm_ldap: file %s: skipping line %i: unknown or invalid operator %s",
 704                                        filename, linenumber, opstring);
 705                                 continue;
 706                         }
 707                 }
 708
 709                 /* create new TLDAP_RADIUS list node */
 710                 pair = rad_malloc(sizeof(*pair));
 711
 712                 pair->attr = strdup(ldapAttribute);
 713                 pair->radius_attr = strdup(radiusAttribute);
 714                 pair->operator = operator;
 715
 716                 if ( (pair->attr == NULL) || (pair->radius_attr == NULL) ) {
 717                         radlog(L_ERR, "rlm_ldap: Out of memory");
 718                         if (pair->attr) free(pair->attr);
 719                         if (pair->radius_attr) free(pair->radius_attr);
 720                         free(pair);
 721                         fclose(mapfile);
 722                         return -1;
 723                 }
 724
 725                 /* push node to correct list */
 726                 if (strcasecmp(itemType, "checkItem") == 0) {
 727                         pair->next = inst->check_item_map;
 728                         inst->check_item_map = pair;
 729                 } else if (strcasecmp(itemType, "replyItem") == 0) {
 730                         pair->next = inst->reply_item_map;
 731                         inst->reply_item_map = pair;
 732                 } else {
 733                         radlog(L_ERR, "rlm_ldap: file %s: skipping line %i: unknown itemType %s",
 734                                filename, linenumber, itemType);
 735                         free(pair->attr);
 736                         free(pair->radius_attr);
 737                         free(pair);
 738                         continue;
 739                 }
 740
 741                 DEBUG("rlm_ldap: LDAP %s mapped to RADIUS %s",
 742                       pair->attr, pair->radius_attr);
 743         }
 744
 745         fclose(mapfile);
 746
 747         return 0; /* success */
 748 }
 749
 750 static int perform_search(void *instance, LDAP_CONN *conn,
 751                           char *search_basedn, int scope, char *filter,
 752                           char **attrs, LDAPMessage ** result)
 753 {
 754         int             res = RLM_MODULE_OK;
 755         int             ldap_errno = 0;
 756         ldap_instance  *inst = instance;
 757         int             search_retry = 0;
 758
 759         *result = NULL;
 760
 761         if (!conn){
 762                 radlog(L_ERR, "rlm_ldap: NULL connection handle passed");
 763                 return RLM_MODULE_FAIL;
 764         }
 765         if (conn->failed_conns > MAX_FAILED_CONNS_START){
 766                 conn->failed_conns++;
 767                 if (conn->failed_conns >= MAX_FAILED_CONNS_END){
 768                         conn->failed_conns = MAX_FAILED_CONNS_RESTART;
 769                         conn->bound = 0;
 770                 }
 771         }
 772 retry:
 773         if (!conn->bound || conn->ld == NULL) {
 774                 DEBUG2("rlm_ldap: attempting LDAP reconnection");
 775                 if (conn->ld){
 776                         DEBUG2("rlm_ldap: closing existing LDAP connection");
 777                         ldap_unbind_s(conn->ld);
 778                 }
 779                 if ((conn->ld = ldap_connect(instance, inst->login,
 780                                              inst->password, 0, &res, NULL)) == NULL) {
 781                         radlog(L_ERR, "rlm_ldap: (re)connection attempt failed");
 782                         if (search_retry == 0)
 783                                 conn->failed_conns++;
 784                         return (RLM_MODULE_FAIL);
 785                 }
 786                 conn->bound = 1;
 787                 conn->failed_conns = 0;
 788         }
 789         DEBUG2("rlm_ldap: performing search in %s, with filter %s",
 790                search_basedn ? search_basedn : "(null)" , filter);
 791         switch (ldap_search_st(conn->ld, search_basedn, scope, filter,
 792                                attrs, 0, &(inst->timeout), result)) {
 793         case LDAP_SUCCESS:
 794         case LDAP_NO_SUCH_OBJECT:
 795                 break;
 796         case LDAP_SERVER_DOWN:
 797                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: LDAP connection lost.");
 798                 conn->failed_conns++;
 799                 if (search_retry == 0){
 800                         if (conn->failed_conns <= MAX_FAILED_CONNS_START){
 801                                 radlog(L_INFO, "rlm_ldap: Attempting reconnect");
 802                                 search_retry = 1;
 803                                 conn->bound = 0;
 804                                 ldap_msgfree(*result);
 805                                 goto retry;
 806                         }
 807                 }
 808                 ldap_msgfree(*result);
 809                 return RLM_MODULE_FAIL;
 810         case LDAP_INSUFFICIENT_ACCESS:
 811                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: Insufficient access. Check the identity and password configuration directives.");
 812                 ldap_msgfree(*result);
 813                 return RLM_MODULE_FAIL;
 814         case LDAP_TIMEOUT:
 815                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: Timed out while waiting for server to respond. Please increase the timeout.");
 816                 ldap_msgfree(*result);
 817                 return RLM_MODULE_FAIL;
 818         case LDAP_FILTER_ERROR:
 819                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: Bad search filter: %s",filter);
 820                 ldap_msgfree(*result);
 821                 return RLM_MODULE_FAIL;
 822         case LDAP_TIMELIMIT_EXCEEDED:
 823         case LDAP_BUSY:
 824         case LDAP_UNAVAILABLE:
 825                 /* We don't need to reconnect in these cases so we don't set conn->bound */
 826                 ldap_get_option(conn->ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
 827                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: %s",
 828                        ldap_err2string(ldap_errno));
 829                 ldap_msgfree(*result);
 830                 return (RLM_MODULE_FAIL);
 831         default:
 832                 ldap_get_option(conn->ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
 833                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: %s",
 834                        ldap_err2string(ldap_errno));
 835                 conn->bound = 0;
 836                 ldap_msgfree(*result);
 837                 return (RLM_MODULE_FAIL);
 838         }
 839
 840         if ((ldap_count_entries(conn->ld, *result)) != 1) {
 841                 DEBUG("rlm_ldap: object not found or got ambiguous search result");
 842                 res = RLM_MODULE_NOTFOUND;
 843                 ldap_msgfree(*result);
 844         }
 845         return res;
 846 }
 847
 848
 849 /*
 850  *      Translate the LDAP queries.
 851  */
 852 static int ldap_escape_func(char *out, int outlen, const char *in)
 853 {
 854         int len = 0;
 855
 856         while (in[0]) {
 857                 /*
 858                  *      Encode unsafe characters.
 859                  */
 860                 if (((len == 0) &&
 861                     ((in[0] == ' ') || (in[0] == '#'))) ||
 862                     (strchr(",+\"\\<>;*=()", *in))) {
 863                         static const char hex[] = "0123456789abcdef";
 864
 865                         /*
 866                          *      Only 3 or less bytes available.
 867                          */
 868                         if (outlen <= 3) {
 869                                 break;
 870                         }
 871
 872                         *(out++) = '\\';
 873                         *(out++) = hex[((*in) >> 4) & 0x0f];
 874                         *(out++) = hex[(*in) & 0x0f];
 875                         outlen -= 3;
 876                         len += 3;
 877                         in++;
 878                         continue;
 879                 }
 880
 881                 /*
 882                  *      Only one byte left.
 883                  */
 884                 if (outlen <= 1) {
 885                         break;
 886                 }
 887
 888                 /*
 889                  *      Allowed character.
 890                  */
 891                 *(out++) = *(in++);
 892                 outlen--;
 893                 len++;
 894         }
 895         *out = '\0';
 896         return len;
 897 }
 898
 899 /*
 900  *      ldap_groupcmp(). Implement the Ldap-Group == "group" filter
 901  */
 902 static int ldap_groupcmp(void *instance, REQUEST *req,
 903                          UNUSED VALUE_PAIR *request, VALUE_PAIR *check,
 904                          UNUSED VALUE_PAIR *check_pairs,
 905                          UNUSED VALUE_PAIR **reply_pairs)
 906 {
 907         char            filter[MAX_FILTER_STR_LEN];
 908         char            gr_filter[MAX_FILTER_STR_LEN];
 909         int             res;
 910         LDAPMessage     *result = NULL;
 911         LDAPMessage     *msg = NULL;
 912         char            basedn[MAX_FILTER_STR_LEN];
 913         char            *attrs[] = {"dn",NULL};
 914         char            **vals;
 915         ldap_instance   *inst = instance;
 916         char            *group_attrs[] = {inst->groupmemb_attr,NULL};
 917         LDAP_CONN       *conn;
 918         int             conn_id = -1;
 919         VALUE_PAIR      *vp_user_dn;
 920         VALUE_PAIR      **request_pairs;
 921
 922         request_pairs = &req->config_items;
 923
 924         DEBUG("rlm_ldap: Entering ldap_groupcmp()");
 925
 926         if (check->vp_strvalue == NULL || check->length == 0){
 927                 DEBUG("rlm_ldap::ldap_groupcmp: Illegal group name");
 928                 return 1;
 929         }
 930
 931         if (req == NULL){
 932                 DEBUG("rlm_ldap::ldap_groupcmp: NULL request");
 933                 return 1;
 934         }
 935
 936         if (!radius_xlat(basedn, sizeof(basedn), inst->basedn, req, ldap_escape_func)) {
 937                 DEBUG("rlm_ldap::ldap_groupcmp: unable to create basedn.");
 938                 return 1;
 939         }
 940
 941         while((vp_user_dn = pairfind(*request_pairs, PW_LDAP_USERDN)) == NULL){
 942                 char            *user_dn = NULL;
 943
 944                 if (!radius_xlat(filter, sizeof(filter), inst->filter,
 945                                         req, ldap_escape_func)){
 946                         DEBUG("rlm_ldap::ldap_groupcmp: unable to create filter");
 947                         return 1;
 948                 }
 949                 if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
 950                         radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
 951                         return 1;
 952                 }
 953                 if ((res = perform_search(inst, conn, basedn, LDAP_SCOPE_SUBTREE,
 954                                         filter, attrs, &result)) != RLM_MODULE_OK){
 955                         DEBUG("rlm_ldap::ldap_groupcmp: search failed");
 956                         ldap_release_conn(conn_id,inst->conns);
 957                         return 1;
 958                 }
 959                 if ((msg = ldap_first_entry(conn->ld, result)) == NULL) {
 960                         DEBUG("rlm_ldap::ldap_groupcmp: ldap_first_entry() failed");
 961                         ldap_release_conn(conn_id,inst->conns);
 962                         ldap_msgfree(result);
 963                         return 1;
 964                 }
 965                 if ((user_dn = ldap_get_dn(conn->ld, msg)) == NULL) {
 966                         DEBUG("rlm_ldap:ldap_groupcmp:: ldap_get_dn() failed");
 967                         ldap_release_conn(conn_id,inst->conns);
 968                         ldap_msgfree(result);
 969                         return 1;
 970                 }
 971                 ldap_release_conn(conn_id,inst->conns);
 972
 973                 /*
 974                  *      Adding new attribute containing DN for LDAP
 975                  *      object associated with given username
 976                  */
 977                 pairadd(request_pairs, pairmake("Ldap-UserDn", user_dn,
 978                                                 T_OP_EQ));
 979                 ldap_memfree(user_dn);
 980                 ldap_msgfree(result);
 981         }
 982
 983         if(!radius_xlat(gr_filter, sizeof(gr_filter),
 984                         inst->groupmemb_filt, req, ldap_escape_func)) {
 985                 DEBUG("rlm_ldap::ldap_groupcmp: unable to create filter.");
 986                 return 1;
 987         }
 988
 989         if (strchr((char *)check->vp_strvalue,',') != NULL) {
 990                 /* This looks like a DN */
 991                 snprintf(filter,sizeof(filter), "%s",gr_filter);
 992                 snprintf(basedn,sizeof(basedn), "%s",(char *)check->vp_strvalue);
 993         } else
 994                 snprintf(filter,sizeof(filter), "(&(%s=%s)%s)",
 995                          inst->groupname_attr,
 996                          (char *)check->vp_strvalue,gr_filter);
 997
 998         if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1) {
 999                 radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
1000                 return 1;
1001         }
1002
1003         if ((res = perform_search(inst, conn, basedn, LDAP_SCOPE_SUBTREE,
1004                                 filter, attrs, &result)) == RLM_MODULE_OK) {
1005                 DEBUG("rlm_ldap::ldap_groupcmp: User found in group %s",
1006                                 (char *)check->vp_strvalue);
1007                 ldap_msgfree(result);
1008                 ldap_release_conn(conn_id,inst->conns);
1009                 return 0;
1010         }
1011
1012         ldap_release_conn(conn_id,inst->conns);
1013
1014         if (res != RLM_MODULE_NOTFOUND ) {
1015                 DEBUG("rlm_ldap::ldap_groupcmp: Search returned error");
1016                 return 1;
1017         }
1018
1019         if (inst->groupmemb_attr == NULL){
1020                 /*
1021                  *      Search returned NOTFOUND and searching for
1022                  *      membership using user object attributes is not
1023                  *      specified in config file
1024                  */
1025                 DEBUG("rlm_ldap::ldap_groupcmp: Group %s not found or user is not a member.",(char *)check->vp_strvalue);
1026                 return 1;
1027         }
1028
1029         snprintf(filter,sizeof(filter), "(objectclass=*)");
1030         if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
1031                 radlog(L_ERR, "rlm_ldap: Add ldap connections are in use");
1032                 return 1;
1033         }
1034         if ((res = perform_search(inst, conn, vp_user_dn->vp_strvalue,
1035                                   LDAP_SCOPE_BASE, filter, group_attrs,
1036                                   &result)) != RLM_MODULE_OK) {
1037                 DEBUG("rlm_ldap::ldap_groupcmp: Search returned error");
1038                 ldap_release_conn(conn_id, inst->conns);
1039                 return 1;
1040         }
1041
1042         if ((msg = ldap_first_entry(conn->ld, result)) == NULL) {
1043                 DEBUG("rlm_ldap::ldap_groupcmp: ldap_first_entry() failed");
1044                 ldap_release_conn(conn_id,inst->conns);
1045                 ldap_msgfree(result);
1046                 return 1;
1047         }
1048         if ((vals = ldap_get_values(conn->ld, msg,
1049                                     inst->groupmemb_attr)) != NULL) {
1050                 unsigned int i = 0;
1051                 char found = 0;
1052
1053                 for (;i < ldap_count_values(vals);i++){
1054                         if (strchr(vals[i],',') != NULL){
1055                                 /* This looks like a DN */
1056                                 LDAPMessage *gr_result = NULL;
1057                                 snprintf(filter,sizeof(filter), "(%s=%s)",
1058                                         inst->groupname_attr,
1059                                         (char *)check->vp_strvalue);
1060                                 if ((res = perform_search(inst, conn, vals[i],
1061                                                 LDAP_SCOPE_BASE, filter,
1062                                                 attrs, &gr_result)) != RLM_MODULE_OK){
1063                                         if (res != RLM_MODULE_NOTFOUND) {
1064                                                 DEBUG("rlm_ldap::ldap_groupcmp: Search returned error");
1065                                                 ldap_value_free(vals);
1066                                                 ldap_msgfree(result);
1067                                                 ldap_release_conn(conn_id,inst->conns);
1068                                                 return 1;
1069                                         }
1070                                 } else {
1071                                         ldap_msgfree(gr_result);
1072                                         found = 1;
1073                                         break;
1074                                 }
1075                         } else {
1076                                 if (strcmp(vals[i],(char *)check->vp_strvalue) == 0){
1077                                         found = 1;
1078                                         break;
1079                                 }
1080                         }
1081                 }
1082                 ldap_value_free(vals);
1083                 ldap_msgfree(result);
1084                 if (found == 0){
1085                         DEBUG("rlm_ldap::groupcmp: Group %s not found or user not a member",
1086                                 (char *)check->vp_strvalue);
1087                         ldap_release_conn(conn_id,inst->conns);
1088                         return 1;
1089                 }
1090         } else {
1091                         DEBUG("rlm_ldap::ldap_groupcmp: ldap_get_values() failed");
1092                         ldap_msgfree(result);
1093                         ldap_release_conn(conn_id,inst->conns);
1094                         return 1;
1095         }
1096
1097         DEBUG("rlm_ldap::ldap_groupcmp: User found in group %s",(char *)check->vp_strvalue);
1098         ldap_release_conn(conn_id,inst->conns);
1099
1100         return 0;
1101 }
1102
1103 /*
1104  * ldap_xlat()
1105  * Do an xlat on an LDAP URL
1106  */
1107 static int ldap_xlat(void *instance, REQUEST *request, char *fmt,
1108                      char *out, size_t freespace, RADIUS_ESCAPE_STRING func)
1109 {
1110         char url[MAX_FILTER_STR_LEN];
1111         int res;
1112         int ret = 0;
1113         ldap_instance *inst = instance;
1114         LDAPURLDesc *ldap_url;
1115         LDAPMessage *result = NULL;
1116         LDAPMessage *msg = NULL;
1117         char **vals;
1118         int conn_id = -1;
1119         LDAP_CONN *conn;
1120
1121         DEBUG("rlm_ldap: - ldap_xlat");
1122         if (!radius_xlat(url, sizeof(url), fmt, request, func)) {
1123                 radlog (L_ERR, "rlm_ldap: Unable to create LDAP URL.\n");
1124                 return 0;
1125         }
1126         if (!ldap_is_ldap_url(url)){
1127                 radlog (L_ERR, "rlm_ldap: String passed does not look like an LDAP URL.\n");
1128                 return 0;
1129         }
1130         if (ldap_url_parse(url,&ldap_url)){
1131                 radlog (L_ERR, "rlm_ldap: LDAP URL parse failed.\n");
1132                 return 0;
1133         }
1134         if (ldap_url->lud_attrs == NULL || ldap_url->lud_attrs[0] == NULL ||
1135             ( ldap_url->lud_attrs[1] != NULL ||
1136               ( ! strlen(ldap_url->lud_attrs[0]) ||
1137                 ! strcmp(ldap_url->lud_attrs[0],"*") ) ) ){
1138                 radlog (L_ERR, "rlm_ldap: Invalid Attribute(s) request.\n");
1139                 ldap_free_urldesc(ldap_url);
1140                 return 0;
1141         }
1142         if (ldap_url->lud_host){
1143                 if (strncmp(inst->server,ldap_url->lud_host,
1144                             strlen(inst->server)) != 0 ||
1145                     ldap_url->lud_port != inst->port) {
1146                         DEBUG("rlm_ldap: Requested server/port is not known to this module instance.");
1147                         ldap_free_urldesc(ldap_url);
1148                         return 0;
1149                 }
1150         }
1151         if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
1152                 radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
1153                 ldap_free_urldesc(ldap_url);
1154                 return 0;
1155         }
1156         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){
1157                 if (res == RLM_MODULE_NOTFOUND){
1158                         DEBUG("rlm_ldap: Search returned not found");
1159                         ldap_free_urldesc(ldap_url);
1160                         ldap_release_conn(conn_id,inst->conns);
1161                         return 0;
1162                 }
1163                 DEBUG("rlm_ldap: Search returned error");
1164                 ldap_free_urldesc(ldap_url);
1165                 ldap_release_conn(conn_id,inst->conns);
1166                 return 0;
1167         }
1168         if ((msg = ldap_first_entry(conn->ld, result)) == NULL){
1169                 DEBUG("rlm_ldap: ldap_first_entry() failed");
1170                 ldap_msgfree(result);
1171                 ldap_free_urldesc(ldap_url);
1172                 ldap_release_conn(conn_id,inst->conns);
1173                 return 0;
1174         }
1175         if ((vals = ldap_get_values(conn->ld, msg, ldap_url->lud_attrs[0])) != NULL) {
1176                 ret = strlen(vals[0]);
1177                 if (ret >= freespace){
1178                         DEBUG("rlm_ldap: Insufficient string space");
1179                         ldap_free_urldesc(ldap_url);
1180                         ldap_value_free(vals);
1181                         ldap_msgfree(result);
1182                         ldap_release_conn(conn_id,inst->conns);
1183                         return 0;
1184                 }
1185                 DEBUG("rlm_ldap: Adding attribute %s, value: %s",ldap_url->lud_attrs[0],vals[0]);
1186                 strlcpy(out,vals[0],freespace);
1187                 ldap_value_free(vals);
1188         }
1189         else
1190                 ret = 0;
1191
1192         ldap_msgfree(result);
1193         ldap_free_urldesc(ldap_url);
1194         ldap_release_conn(conn_id,inst->conns);
1195
1196         DEBUG("rlm_ldap: - ldap_xlat end");
1197
1198         return ret;
1199 }
1200
1201
1202 /*
1203  *      For auto-header discovery.
1204  */
1205 static const FR_NAME_NUMBER header_names[] = {
1206         { "{clear}",    PW_CLEARTEXT_PASSWORD },
1207         { "{cleartext}", PW_CLEARTEXT_PASSWORD },
1208         { "{md5}",      PW_MD5_PASSWORD },
1209         { "{smd5}",     PW_SMD5_PASSWORD },
1210         { "{crypt}",    PW_CRYPT_PASSWORD },
1211         { "{sha}",      PW_SHA_PASSWORD },
1212         { "{ssha}",     PW_SSHA_PASSWORD },
1213         { "{nt}",       PW_NT_PASSWORD },
1214         { "{ns-mta-md5}", PW_NS_MTA_MD5_PASSWORD },
1215         { NULL, 0 }
1216 };
1217
1218
1219 /******************************************************************************
1220  *
1221  *      Function: rlm_ldap_authorize
1222  *
1223  *      Purpose: Check if user is authorized for remote access
1224  *
1225  ******************************************************************************/
1226 static int ldap_authorize(void *instance, REQUEST * request)
1227 {
1228         LDAPMessage     *result = NULL;
1229         LDAPMessage     *msg = NULL;
1230         LDAPMessage     *def_msg = NULL;
1231         LDAPMessage     *def_attr_msg = NULL;
1232         LDAPMessage     *def_result = NULL;
1233         LDAPMessage     *def_attr_result = NULL;
1234         ldap_instance   *inst = instance;
1235         char            *user_dn = NULL;
1236         char            filter[MAX_FILTER_STR_LEN];
1237         char            basedn[MAX_FILTER_STR_LEN];
1238         VALUE_PAIR      *check_tmp;
1239         VALUE_PAIR      *reply_tmp;
1240         int             res;
1241         VALUE_PAIR      **check_pairs, **reply_pairs;
1242         char            **vals;
1243         VALUE_PAIR      *module_fmsg_vp;
1244         VALUE_PAIR      *user_profile;
1245         char            module_fmsg[MAX_STRING_LEN];
1246         LDAP_CONN       *conn;
1247         int             conn_id = -1;
1248         int             added_known_password = 0;
1249
1250         DEBUG("rlm_ldap: - authorize");
1251
1252         if (!request->username){
1253                 DEBUG2("rlm_ldap: Attribute \"User-Name\" is required for authorization.\n");
1254                 return RLM_MODULE_NOOP;
1255         }
1256
1257         check_pairs = &request->config_items;
1258         reply_pairs = &request->reply->vps;
1259
1260         /*
1261          * Check for valid input, zero length names not permitted
1262          */
1263         if (request->username->vp_strvalue == 0) {
1264                 radlog(L_ERR, "rlm_ldap: zero length username not permitted\n");
1265                 return RLM_MODULE_INVALID;
1266         }
1267         DEBUG("rlm_ldap: performing user authorization for %s",
1268                request->username->vp_strvalue);
1269
1270         if (!radius_xlat(filter, sizeof(filter), inst->filter,
1271                          request, ldap_escape_func)) {
1272                 radlog (L_ERR, "rlm_ldap: unable to create filter.\n");
1273                 return RLM_MODULE_INVALID;
1274         }
1275
1276         if (!radius_xlat(basedn, sizeof(basedn), inst->basedn,
1277                          request, ldap_escape_func)) {
1278                 radlog (L_ERR, "rlm_ldap: unable to create basedn.\n");
1279                 return RLM_MODULE_INVALID;
1280         }
1281
1282         if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
1283                 radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
1284                 return RLM_MODULE_FAIL;
1285         }
1286         if ((res = perform_search(instance, conn, basedn, LDAP_SCOPE_SUBTREE, filter, inst->atts, &result)) != RLM_MODULE_OK) {
1287                 DEBUG("rlm_ldap: search failed");
1288                 if (res == RLM_MODULE_NOTFOUND){
1289                         snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: User not found");
1290                         module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1291                         pairadd(&request->packet->vps, module_fmsg_vp);
1292                 }
1293                 ldap_release_conn(conn_id,inst->conns);
1294                 return (res);
1295         }
1296         if ((msg = ldap_first_entry(conn->ld, result)) == NULL) {
1297                 DEBUG("rlm_ldap: ldap_first_entry() failed");
1298                 ldap_msgfree(result);
1299                 ldap_release_conn(conn_id,inst->conns);
1300                 return RLM_MODULE_FAIL;
1301         }
1302         if ((user_dn = ldap_get_dn(conn->ld, msg)) == NULL) {
1303                 DEBUG("rlm_ldap: ldap_get_dn() failed");
1304                 ldap_msgfree(result);
1305                 ldap_release_conn(conn_id,inst->conns);
1306                 return RLM_MODULE_FAIL;
1307         }
1308         /*
1309          * Adding new attribute containing DN for LDAP object associated with
1310          * given username
1311          */
1312         pairadd(check_pairs, pairmake("Ldap-UserDn", user_dn, T_OP_EQ));
1313         ldap_memfree(user_dn);
1314
1315
1316         /* Remote access is controled by attribute of the user object */
1317         if (inst->access_attr) {
1318                 if ((vals = ldap_get_values(conn->ld, msg, inst->access_attr)) != NULL) {
1319                         if (inst->default_allow){
1320                                 DEBUG("rlm_ldap: checking if remote access for %s is allowed by %s", request->username->vp_strvalue, inst->access_attr);
1321                                 if (!strncmp(vals[0], "FALSE", 5)) {
1322                                         DEBUG("rlm_ldap: dialup access disabled");
1323                                         snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Access Attribute denies access");
1324                                         module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1325                                         pairadd(&request->packet->vps, module_fmsg_vp);
1326                                         ldap_msgfree(result);
1327                                         ldap_value_free(vals);
1328                                         ldap_release_conn(conn_id,inst->conns);
1329                                         return RLM_MODULE_USERLOCK;
1330                                 }
1331                                 ldap_value_free(vals);
1332                         }
1333                         else{
1334                                 DEBUG("rlm_ldap: %s attribute exists - access denied by default", inst->access_attr);
1335                                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Access Attribute denies access");
1336                                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1337                                 pairadd(&request->packet->vps, module_fmsg_vp);
1338                                 ldap_msgfree(result);
1339                                 ldap_value_free(vals);
1340                                 ldap_release_conn(conn_id,inst->conns);
1341                                 return RLM_MODULE_USERLOCK;
1342                         }
1343                 } else {
1344                         if (inst->default_allow){
1345                                 DEBUG("rlm_ldap: no %s attribute - access denied by default", inst->access_attr);
1346                                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Access Attribute denies access");
1347                                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1348                                 pairadd(&request->packet->vps, module_fmsg_vp);
1349                                 ldap_msgfree(result);
1350                                 ldap_release_conn(conn_id,inst->conns);
1351                                 return RLM_MODULE_USERLOCK;
1352                         }
1353                 }
1354         }
1355
1356         /*
1357          * Check for the default profile entry. If it exists then add the
1358          * attributes it contains in the check and reply pairs
1359          */
1360
1361         user_profile = pairfind(request->config_items, PW_USER_PROFILE);
1362         if (inst->default_profile || user_profile){
1363                 char *profile = inst->default_profile;
1364
1365                 strlcpy(filter,inst->base_filter,sizeof(filter));
1366                 if (user_profile)
1367                         profile = user_profile->vp_strvalue;
1368                 if (profile && strlen(profile)){
1369                         if ((res = perform_search(instance, conn,
1370                                 profile, LDAP_SCOPE_BASE,
1371                                 filter, inst->atts, &def_result)) == RLM_MODULE_OK){
1372                                 if ((def_msg = ldap_first_entry(conn->ld,def_result))){
1373                                         if ((check_tmp = ldap_pairget(conn->ld,def_msg,inst->check_item_map,check_pairs,1))) {
1374                                                 if (inst->do_xlat){
1375                                                         pairxlatmove(request, check_pairs, &check_tmp);
1376                                                         pairfree(&check_tmp);
1377                                                 }
1378                                                 else
1379                                                         pairadd(check_pairs,check_tmp);
1380                                         }
1381                                         if ((reply_tmp = ldap_pairget(conn->ld,def_msg,inst->reply_item_map,reply_pairs,0))) {
1382                                                 if (inst->do_xlat){
1383                                                         pairxlatmove(request, reply_pairs, &reply_tmp);
1384                                                         pairfree(&reply_tmp);
1385                                                 }
1386                                                 else
1387                                                         pairadd(reply_pairs,reply_tmp);
1388                                         }
1389                                 }
1390                                 ldap_msgfree(def_result);
1391                         } else
1392                                 DEBUG("rlm_ldap: default_profile/user-profile search failed");
1393                 }
1394         }
1395
1396         /*
1397          * Check for the profile attribute. If it exists, we assume that it
1398          * contains the DN of an entry containg a profile for the user. That
1399          * way we can have different general profiles for various user groups
1400          * (students,faculty,staff etc)
1401          */
1402
1403         if (inst->profile_attr){
1404                 if ((vals = ldap_get_values(conn->ld, msg, inst->profile_attr)) != NULL) {
1405                         unsigned int i=0;
1406                         strlcpy(filter,inst->base_filter,sizeof(filter));
1407                         while(vals[i] != NULL && strlen(vals[i])){
1408                                 if ((res = perform_search(instance, conn,
1409                                         vals[i], LDAP_SCOPE_BASE,
1410                                         filter, inst->atts, &def_attr_result)) == RLM_MODULE_OK){
1411                                         if ((def_attr_msg = ldap_first_entry(conn->ld,def_attr_result))){
1412                                                 if ((check_tmp = ldap_pairget(conn->ld,def_attr_msg,inst->check_item_map,check_pairs,1))) {
1413                                                         if (inst->do_xlat){
1414                                                                 pairxlatmove(request, check_pairs, &check_tmp);
1415                                                                 pairfree(&check_tmp);
1416                                                         }
1417                                                         else
1418                                                                 pairadd(check_pairs,check_tmp);
1419                                                 }
1420                                                 if ((reply_tmp = ldap_pairget(conn->ld,def_attr_msg,inst->reply_item_map,reply_pairs,0))) {
1421                                                         if (inst->do_xlat){
1422                                                                 pairxlatmove(request, reply_pairs, &reply_tmp);
1423                                                                 pairfree(&reply_tmp);
1424                                                         }
1425                                                         else
1426                                                                 pairadd(reply_pairs,reply_tmp);
1427                                                 }
1428                                         }
1429                                         ldap_msgfree(def_attr_result);
1430                                 } else
1431                                         DEBUG("rlm_ldap: profile_attribute search failed");
1432                                 i++;
1433                         }
1434                         ldap_value_free(vals);
1435                 }
1436         }
1437         if (inst->passwd_attr && strlen(inst->passwd_attr)) {
1438 #ifdef NOVELL_UNIVERSAL_PASSWORD
1439                 if (strcasecmp(inst->passwd_attr,"nspmPassword") != 0) {
1440 #endif
1441                         VALUE_PAIR *passwd_item;
1442                         char **passwd_vals;
1443                         char *value = NULL;
1444                         int i;
1445
1446                         /*
1447                          *      Read the password from the DB, and
1448                          *      add it to the request.
1449                          */
1450                         passwd_vals = ldap_get_values(conn->ld,msg,
1451                                                       inst->passwd_attr);
1452
1453                         /*
1454                          *      Loop over what we received, and parse it.
1455                          */
1456                         if (passwd_vals) for (i = 0;
1457                                               passwd_vals[i] != NULL;
1458                                               i++) {
1459                                 int attr = PW_USER_PASSWORD;
1460
1461                                 if (strlen(passwd_vals[i]) == 0)
1462                                         continue;
1463
1464                                 value = passwd_vals[i];
1465
1466                                 if (inst->auto_header) {
1467                                         char *p;
1468                                         char autobuf[16];
1469
1470                                         p = strchr(value, '}');
1471                                         if (!p) continue;
1472                                         if ((p - value + 1) >= sizeof(autobuf))
1473                                                 continue; /* paranoia */
1474                                         memcpy(autobuf, value, p - value + 1);
1475                                         autobuf[p - value + 1] = '\0';
1476
1477                                         attr = fr_str2int(header_names,
1478                                                             autobuf, 0);
1479                                         if (!attr) continue;
1480                                         value = p + 1;
1481                                         goto create_attr;
1482
1483                                 } else if (inst->passwd_hdr &&
1484                                            strlen(inst->passwd_hdr)) {
1485                                         if (strncasecmp(value,
1486                                                         inst->passwd_hdr,
1487                                                         strlen(inst->passwd_hdr)) == 0) {
1488                                                 value += strlen(inst->passwd_hdr);
1489                                         } else {
1490                                                 DEBUG("rlm_ldap: Password header not found in password %s for user %s", passwd_vals[0], request->username->vp_strvalue);
1491                                         }
1492                                 }
1493                                 if (!value) continue;
1494
1495                         create_attr:
1496                                 passwd_item = radius_paircreate(request,
1497                                                                 &request->config_items,
1498                                                                 attr,
1499                                                                 PW_TYPE_STRING);
1500                                 strlcpy(passwd_item->vp_strvalue, value,
1501                                         sizeof(passwd_item->vp_strvalue));
1502                                 passwd_item->length = strlen(passwd_item->vp_strvalue);
1503                                 DEBUG("rlm_ldap: Added %s = %s in check items",
1504                                       passwd_item->name,
1505                                       passwd_item->vp_strvalue);
1506                                 added_known_password = 1;
1507                         }
1508                         ldap_value_free(passwd_vals);
1509 #ifdef NOVELL_UNIVERSAL_PASSWORD
1510                 }
1511                 else{
1512                 /*
1513                 * Read Universal Password from eDirectory
1514                 */
1515                         VALUE_PAIR      *passwd_item;
1516                         VALUE_PAIR      *vp_user_dn;
1517                         int             passwd_len;
1518                         char            *universal_password = NULL;
1519                         int             universal_password_len = UNIVERSAL_PASS_LEN;
1520                         char            *passwd_val = NULL;
1521
1522                         res = 0;
1523
1524                         if ((passwd_item = pairfind(request->config_items, PW_CLEARTEXT_PASSWORD)) == NULL){
1525
1526                                 universal_password = rad_malloc(universal_password_len);
1527                                 memset(universal_password, 0, universal_password_len);
1528
1529                                 vp_user_dn = pairfind(request->config_items,PW_LDAP_USERDN);
1530                                 res = nmasldap_get_password(conn->ld,vp_user_dn->vp_strvalue,&universal_password_len,universal_password);
1531
1532                                 if (res == 0){
1533                                         passwd_val = universal_password;
1534
1535                                         if (inst->passwd_hdr && strlen(inst->passwd_hdr)){
1536                                                 passwd_val = strstr(passwd_val,inst->passwd_hdr);
1537
1538                                                 if (passwd_val != NULL)
1539                                                         passwd_val += strlen((char*)inst->passwd_hdr);
1540                                                 else
1541                                                         DEBUG("rlm_ldap: Password header not found in password %s for user %s ",passwd_val,request->username->vp_strvalue);
1542                                         }
1543
1544                                         if (passwd_val){
1545                                                 passwd_item = radius_paircreate(request, &request->config_items, PW_CLEARTEXT_PASSWORD, PW_TYPE_STRING);
1546                                                 strlcpy(passwd_item->vp_strvalue,passwd_val,sizeof(passwd_item->vp_strvalue));
1547                                                 passwd_item->length = strlen(passwd_item->vp_strvalue);
1548                                                 added_known_password = 1;
1549
1550 #ifdef NOVELL
1551                                                 {
1552                                                         DICT_ATTR *dattr;
1553                                                         VALUE_PAIR      *vp_inst, *vp_apc;
1554                                                         int inst_attr, apc_attr;
1555
1556                                                         dattr = dict_attrbyname("LDAP-Instance");
1557                                                         inst_attr = dattr->attr;
1558                                                         dattr = dict_attrbyname("eDir-APC");
1559                                                         apc_attr = dattr->attr;
1560
1561                                                         vp_inst = pairfind(request->config_items, inst_attr);
1562                                                         if(vp_inst == NULL){
1563                                                                 /*
1564                                                                  * The authorize method of no other LDAP module instance has
1565                                                                  * processed this request.
1566                                                                  */
1567                                                                 vp_inst = radius_paircreate(request, &request->config_items, inst_attr, PW_TYPE_STRING);
1568                                                                 strlcpy(vp_inst->vp_strvalue, inst->xlat_name, sizeof(vp_inst->vp_strvalue));
1569                                                                 vp_inst->length = strlen(vp_inst->vp_strvalue);
1570
1571                                                                 /*
1572                                                                  * Inform the authenticate / post-auth method about the presence
1573                                                                  * of UP in the config items list and whether eDirectory account
1574                                                                  * policy check is to be performed or not.
1575                                                                  */
1576                                                                 vp_apc = radius_paircreate(request, &request->config_items, apc_attr, PW_TYPE_STRING);
1577                                                                 if(!inst->edir_account_policy_check){
1578                                                                         /* Do nothing */
1579                                                                         strcpy(vp_apc->vp_strvalue, "1");
1580                                                                 }else{
1581                                                                         /* Perform eDirectory account-policy check */
1582                                                                         strcpy(vp_apc->vp_strvalue, "2");
1583                                                                 }
1584                                                                 vp_apc->length = 1;
1585                                                         }
1586                                                 }
1587 #endif
1588
1589                                                 DEBUG("rlm_ldap: Added the eDirectory password %s in check items as %s",passwd_item->vp_strvalue,passwd_item->name);
1590                                         }
1591                                 }
1592                                 else {
1593                                         DEBUG("rlm_ldap: Error reading Universal Password.Return Code = %d",res);
1594                                 }
1595
1596                                 memset(universal_password, 0, universal_password_len);
1597                                 free(universal_password);
1598                         }
1599                 }
1600 #endif
1601         }
1602
1603 #ifdef NOVELL
1604         {
1605                 VALUE_PAIR      *vp_auth_opt;
1606                 DICT_ATTR       *dattr;
1607                 char            **auth_option;
1608                 int             auth_opt_attr;
1609
1610                 dattr = dict_attrbyname("eDir-Auth-Option");
1611                 auth_opt_attr = dattr->attr;
1612                 if(pairfind(*check_pairs, auth_opt_attr) == NULL){
1613                         if ((auth_option = ldap_get_values(conn->ld, msg, "sasDefaultLoginSequence")) != NULL) {
1614                                 if ((vp_auth_opt = paircreate(auth_opt_attr, PW_TYPE_STRING)) == NULL){
1615                                         radlog(L_ERR, "rlm_ldap: Could not allocate memory. Aborting.");
1616                                         ldap_msgfree(result);
1617                                         ldap_release_conn(conn_id, inst->conns);
1618                                 }
1619                                 strcpy(vp_auth_opt->vp_strvalue, auth_option[0]);
1620                                 vp_auth_opt->length = strlen(auth_option[0]);
1621                                 pairadd(&request->config_items, vp_auth_opt);
1622                         }else{
1623                                 DEBUG("rlm_ldap: No default NMAS login sequence");
1624                         }
1625                 }
1626         }
1627 #endif
1628
1629         DEBUG("rlm_ldap: looking for check items in directory...");
1630
1631         if ((check_tmp = ldap_pairget(conn->ld, msg, inst->check_item_map,check_pairs,1)) != NULL) {
1632                 if (inst->do_xlat){
1633                         pairxlatmove(request, check_pairs, &check_tmp);
1634                         pairfree(&check_tmp);
1635                 }
1636                 else
1637                         pairadd(check_pairs,check_tmp);
1638         }
1639
1640
1641         DEBUG("rlm_ldap: looking for reply items in directory...");
1642
1643
1644         if ((reply_tmp = ldap_pairget(conn->ld, msg, inst->reply_item_map,reply_pairs,0)) != NULL) {
1645                 if (inst->do_xlat){
1646                         pairxlatmove(request, reply_pairs, &reply_tmp);
1647                         pairfree(&reply_tmp);
1648                 }
1649                 else
1650                         pairadd(reply_pairs,reply_tmp);
1651         }
1652
1653        if (inst->do_comp && paircompare(request,request->packet->vps,*check_pairs,reply_pairs) != 0){
1654 #ifdef NOVELL
1655                 /* Don't perform eDirectory APC if RADIUS authorize fails */
1656                 int apc_attr;
1657                 VALUE_PAIR *vp_apc;
1658                 DICT_ATTR *dattr;
1659
1660                 dattr = dict_attrbyname("eDir-APC");
1661                 apc_attr = dattr->attr;
1662
1663                 vp_apc = pairfind(request->config_items, apc_attr);
1664                 if(vp_apc)
1665                         vp_apc->vp_strvalue[0] = '1';
1666 #endif
1667
1668                 DEBUG("rlm_ldap: Pairs do not match. Rejecting user.");
1669                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Pairs do not match");
1670                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1671                 pairadd(&request->packet->vps, module_fmsg_vp);
1672                 ldap_msgfree(result);
1673                 ldap_release_conn(conn_id,inst->conns);
1674
1675                 return RLM_MODULE_REJECT;
1676         }
1677
1678        /*
1679         *       More warning messages for people who can't be bothered
1680         *       to read the documentation.
1681         */
1682        if (debug_flag > 1) {
1683                if (!pairfind(request->config_items, PW_CLEARTEXT_PASSWORD) &&
1684                    !pairfind(request->config_items, PW_USER_PASSWORD)) {
1685                        DEBUG("WARNING: No \"known good\" password was found in LDAP.  Are you sure that the user is configured correctly?");
1686                }
1687        }
1688
1689         /*
1690          * Module should default to LDAP authentication if no Auth-Type
1691          * specified.  Note that we do this ONLY if configured, AND we
1692          * set the Auth-Type to our module name, which allows multiple
1693          * ldap instances to work.
1694          */
1695         if (inst->set_auth_type &&
1696             (pairfind(*check_pairs, PW_AUTH_TYPE) == NULL) &&
1697             request->password &&
1698             (request->password->attribute == PW_USER_PASSWORD) &&
1699             !added_known_password) {
1700                 pairadd(check_pairs, pairmake("Auth-Type", inst->xlat_name, T_OP_EQ));
1701                 DEBUG("rlm_ldap: Setting Auth-Type = %s", inst->xlat_name);
1702         }
1703
1704         DEBUG("rlm_ldap: user %s authorized to use remote access",
1705               request->username->vp_strvalue);
1706         ldap_msgfree(result);
1707         ldap_release_conn(conn_id,inst->conns);
1708
1709         return RLM_MODULE_OK;
1710 }
1711
1712 /*****************************************************************************
1713  *
1714  *      Function: rlm_ldap_authenticate
1715  *
1716  *      Purpose: Check the user's password against ldap database
1717  *
1718  *****************************************************************************/
1719 static int ldap_authenticate(void *instance, REQUEST * request)
1720 {
1721         LDAP           *ld_user;
1722         LDAPMessage    *result, *msg;
1723         ldap_instance  *inst = instance;
1724         char           *user_dn, *attrs[] = {"uid", NULL};
1725         char            filter[MAX_FILTER_STR_LEN];
1726         char            basedn[MAX_FILTER_STR_LEN];
1727         int             res;
1728         VALUE_PAIR     *vp_user_dn;
1729         VALUE_PAIR      *module_fmsg_vp;
1730         char            module_fmsg[MAX_STRING_LEN];
1731         LDAP_CONN       *conn;
1732         int             conn_id = -1;
1733 #ifdef NOVELL
1734         char            *err = NULL;
1735 #endif
1736
1737         DEBUG("rlm_ldap: - authenticate");
1738
1739         /*
1740          * Ensure that we're being passed a plain-text password, and not
1741          * anything else.
1742          */
1743
1744         if (!request->username) {
1745                 radlog(L_AUTH, "rlm_ldap: Attribute \"User-Name\" is required for authentication.\n");
1746                 return RLM_MODULE_INVALID;
1747         }
1748
1749         if (!request->password){
1750                 radlog(L_AUTH, "rlm_ldap: Attribute \"User-Password\" is required for authentication.");
1751                 DEBUG2("  You seem to have set \"Auth-Type := LDAP\" somewhere.");
1752                 DEBUG2("  THAT CONFIGURATION IS WRONG.  DELETE IT.");
1753                 DEBUG2("  YOU ARE PREVENTING THE SERVER FROM WORKING PROPERLY.");
1754                 return RLM_MODULE_INVALID;
1755         }
1756
1757         if(request->password->attribute != PW_USER_PASSWORD) {
1758                 radlog(L_AUTH, "rlm_ldap: Attribute \"User-Password\" is required for authentication. Cannot use \"%s\".", request->password->name);
1759                 return RLM_MODULE_INVALID;
1760         }
1761
1762         if (request->password->length == 0) {
1763                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: empty password supplied");
1764                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1765                 pairadd(&request->packet->vps, module_fmsg_vp);
1766                 return RLM_MODULE_INVALID;
1767         }
1768
1769         /*
1770          * Check that we don't have any failed connections. If we do there's no real need
1771          * of runing. Also give it another chance if we have a lot of failed connections.
1772          */
1773         if (inst->failed_conns > MAX_FAILED_CONNS_END)
1774                 inst->failed_conns = 0;
1775         if (inst->failed_conns > MAX_FAILED_CONNS_START){
1776                 inst->failed_conns++;
1777                 return RLM_MODULE_FAIL;
1778         }
1779
1780
1781         DEBUG("rlm_ldap: login attempt by \"%s\" with password \"%s\"",
1782                request->username->vp_strvalue, request->password->vp_strvalue);
1783
1784         while ((vp_user_dn = pairfind(request->config_items,
1785                                       PW_LDAP_USERDN)) == NULL) {
1786                 if (!radius_xlat(filter, sizeof(filter), inst->filter,
1787                                 request, ldap_escape_func)) {
1788                         radlog (L_ERR, "rlm_ldap: unable to create filter.\n");
1789                         return RLM_MODULE_INVALID;
1790                 }
1791
1792                 if (!radius_xlat(basedn, sizeof(basedn), inst->basedn,
1793                                 request, ldap_escape_func)) {
1794                         radlog (L_ERR, "rlm_ldap: unable to create basedn.\n");
1795                         return RLM_MODULE_INVALID;
1796                 }
1797
1798                 if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
1799                         radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
1800                         return RLM_MODULE_FAIL;
1801                 }
1802                 if ((res = perform_search(instance, conn, basedn, LDAP_SCOPE_SUBTREE, filter, attrs, &result)) != RLM_MODULE_OK) {
1803                         if (res == RLM_MODULE_NOTFOUND){
1804                                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: User not found");
1805                                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1806                                 pairadd(&request->packet->vps, module_fmsg_vp);
1807                         }
1808                         ldap_release_conn(conn_id,inst->conns);
1809                         return (res);
1810                 }
1811                 if ((msg = ldap_first_entry(conn->ld, result)) == NULL) {
1812                         ldap_msgfree(result);
1813                         ldap_release_conn(conn_id,inst->conns);
1814                         return RLM_MODULE_FAIL;
1815                 }
1816                 if ((user_dn = ldap_get_dn(conn->ld, msg)) == NULL) {
1817                         DEBUG("rlm_ldap: ldap_get_dn() failed");
1818                         ldap_msgfree(result);
1819                         ldap_release_conn(conn_id,inst->conns);
1820                         return RLM_MODULE_FAIL;
1821                 }
1822                 ldap_release_conn(conn_id,inst->conns);
1823                 pairadd(&request->config_items, pairmake("Ldap-UserDn", user_dn, T_OP_EQ));
1824                 ldap_memfree(user_dn);
1825                 ldap_msgfree(result);
1826         }
1827
1828         user_dn = vp_user_dn->vp_strvalue;
1829
1830         DEBUG("rlm_ldap: user DN: %s", user_dn);
1831
1832 #ifndef NOVELL
1833         ld_user = ldap_connect(instance, user_dn, request->password->vp_strvalue,
1834                                1, &res, NULL);
1835 #else
1836         /* Don't perform eDirectory APC again after attempting to bind here. */
1837         {
1838                 int apc_attr;
1839                 DICT_ATTR *dattr;
1840                 VALUE_PAIR *vp_apc;
1841                 VALUE_PAIR      *vp_auth_opt, *vp_state;
1842                 int auth_opt_attr;
1843                 char seq[256];
1844                 char host_ipaddr[32];
1845                 LDAP_CONN       *conn1;
1846                 int auth_state = -1;
1847                 char            *challenge = NULL;
1848                 int             challenge_len = MAX_CHALLENGE_LEN;
1849                 char            *state = NULL;
1850
1851                 dattr = dict_attrbyname("eDir-APC");
1852                 apc_attr = dattr->attr;
1853                 vp_apc = pairfind(request->config_items, apc_attr);
1854                 if(vp_apc && vp_apc->vp_strvalue[0] == '2')
1855                         vp_apc->vp_strvalue[0] = '3';
1856
1857                 res = 0;
1858
1859                 dattr = dict_attrbyname("eDir-Auth-Option");
1860                 auth_opt_attr = dattr->attr;
1861
1862                 vp_auth_opt = pairfind(request->config_items, auth_opt_attr);
1863
1864                 if(vp_auth_opt )
1865                 {
1866                         DEBUG("rlm_ldap: ldap auth option = %s", vp_auth_opt->vp_strvalue);
1867                         strncpy(seq, vp_auth_opt->vp_strvalue, vp_auth_opt->length);
1868                         seq[vp_auth_opt->length] = '\0';
1869                         if( strcmp(seq, "<No Default>") ){
1870
1871                                 /* Get the client IP address to check for packet validity */
1872                                 inet_ntop(AF_INET, &request->packet->src_ipaddr, host_ipaddr, sizeof(host_ipaddr));
1873
1874                                 /* challenge variable is used to receive the challenge from the
1875                                  * Token method (if any) and also to send the state attribute
1876                                  * in case the request packet is a reply to a challenge
1877                                  */
1878                                 challenge = rad_malloc(MAX_CHALLENGE_LEN);
1879
1880                                 /*  If state attribute present in request it is a reply to challenge. */
1881                                 if((vp_state = pairfind(request->packet->vps, PW_STATE))!= NULL ){
1882                                         DEBUG("rlm_ldap: Response to Access-Challenge");
1883                                         strncpy(challenge, vp_state->vp_strvalue, sizeof(challenge));
1884                                         challenge_len = vp_state->length;
1885                                         challenge[challenge_len] = 0;
1886                                         auth_state = -2;
1887                                 }
1888
1889                                 if ((conn_id = ldap_get_conn(inst->conns, &conn1, inst)) == -1){
1890                                         radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
1891                                         res =  RLM_MODULE_FAIL;
1892                                 }
1893
1894                                 if(!conn1){
1895                                         radlog(L_ERR, "rlm_ldap: NULL connection handle passed");
1896                                         return RLM_MODULE_FAIL;
1897                                 }
1898
1899                                 if (conn1->failed_conns > MAX_FAILED_CONNS_START){
1900                                         conn1->failed_conns++;
1901                                         if (conn1->failed_conns >= MAX_FAILED_CONNS_END){
1902                                                 conn1->failed_conns = MAX_FAILED_CONNS_RESTART;
1903                                                 conn1->bound = 0;
1904                                         }
1905                                 }
1906 retry:
1907                                 if (!conn1->bound || conn1->ld == NULL) {
1908                                         DEBUG2("rlm_ldap: attempting LDAP reconnection");
1909                                         if (conn1->ld){
1910                                                 DEBUG2("rlm_ldap: closing existing LDAP connection");
1911                                                 ldap_unbind_s(conn1->ld);
1912                                         }
1913                                         if ((conn1->ld = ldap_connect(instance, inst->login,inst->password, 0, &res, NULL)) == NULL) {
1914                                                 radlog(L_ERR, "rlm_ldap: (re)connection attempt failed");
1915                                                 conn1->failed_conns++;
1916                                                 return (RLM_MODULE_FAIL);
1917                                         }
1918                                         conn1->bound = 1;
1919                                         conn1->failed_conns = 0;
1920                                 }
1921                                 DEBUG("rlm_ldap: Performing NMAS Authentication for user: %s, seq: %s \n", user_dn,seq);
1922
1923                                 res = radLdapXtnNMASAuth(conn1->ld, user_dn, request->password->vp_strvalue, seq, host_ipaddr, &challenge_len, challenge, &auth_state );
1924
1925                                 switch(res){
1926                                         case LDAP_SUCCESS:
1927                                                 ldap_release_conn(conn_id,inst->conns);
1928                                                 if ( auth_state == -1)
1929                                                         res = RLM_MODULE_FAIL;
1930                                                 if ( auth_state != REQUEST_CHALLENGED){
1931                                                         if (auth_state == REQUEST_ACCEPTED){
1932                                                                 DEBUG("rlm_ldap: user %s authenticated succesfully",request->username->vp_strvalue);
1933                                                                 res = RLM_MODULE_OK;
1934                                                         }else if(auth_state == REQUEST_REJECTED){
1935                                                                 DEBUG("rlm_ldap: user %s authentication failed",request->username->vp_strvalue);
1936                                                                 res = RLM_MODULE_REJECT;
1937                                                         }
1938                                                 }else{
1939                                                         /* Request challenged. Generate Reply-Message attribute with challenge data */
1940                                                         pairadd(&request->reply->vps,pairmake("Reply-Message", challenge, T_OP_EQ));
1941                                                         /* Generate state attribute */
1942                                                         state = rad_malloc(MAX_CHALLENGE_LEN);
1943                                                         (void) sprintf(state, "%s%s", challenge, challenge);
1944                                                         vp_state = paircreate(PW_STATE, PW_TYPE_OCTETS);
1945                                                         memcpy(vp_state->vp_strvalue, state, strlen(state));
1946                                                         vp_state->length = strlen(state);
1947                                                         pairadd(&request->reply->vps, vp_state);
1948                                                         free(state);
1949                                                         /* Mark the packet as a Acceess-Challenge Packet */
1950                                                         request->reply->code = PW_ACCESS_CHALLENGE;
1951                                                         DEBUG("rlm_ldap: Sending Access-Challenge.");
1952                                                         res = RLM_MODULE_HANDLED;
1953                                                 }
1954                                                 if(challenge)
1955                                                         free(challenge);
1956                                                 return res;
1957                                         case LDAP_SERVER_DOWN:
1958                                                 radlog(L_ERR, "rlm_ldap: nmas authentication failed: LDAP connection lost.");                                                conn->failed_conns++;
1959                                                 if (conn->failed_conns <= MAX_FAILED_CONNS_START){
1960                                                         radlog(L_INFO, "rlm_ldap: Attempting reconnect");
1961                                                         conn->bound = 0;
1962                                                         goto retry;
1963                                                 }
1964                                                 if(challenge)
1965                                                         free(challenge);
1966                                                 return RLM_MODULE_FAIL;
1967                                         default:
1968                                                 ldap_release_conn(conn_id,inst->conns);
1969                                                 if(challenge)
1970                                                         free(challenge);
1971                                                 return RLM_MODULE_FAIL;
1972                                 }
1973                         }
1974                 }
1975         }
1976
1977         ld_user = ldap_connect(instance, user_dn, request->password->vp_strvalue,
1978                         1, &res, &err);
1979
1980         if(err != NULL){
1981                 /* 'err' contains the LDAP connection error description */
1982                 DEBUG("rlm_ldap: %s", err);
1983                 pairadd(&request->reply->vps, pairmake("Reply-Message", err, T_OP_EQ));
1984                 ldap_memfree((void *)err);
1985         }
1986 #endif
1987
1988         if (ld_user == NULL){
1989                 if (res == RLM_MODULE_REJECT){
1990                         inst->failed_conns = 0;
1991                         snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Bind as user failed");
1992                         module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1993                         pairadd(&request->packet->vps, module_fmsg_vp);
1994                 }
1995                 if (res == RLM_MODULE_FAIL){
1996                         DEBUG("rlm_ldap: ldap_connect() failed");
1997                         inst->failed_conns++;
1998                 }
1999                 return (res);
2000         }
2001
2002         DEBUG("rlm_ldap: user %s authenticated succesfully",
2003               request->username->vp_strvalue);
2004         ldap_unbind_s(ld_user);
2005         inst->failed_conns = 0;
2006
2007         return RLM_MODULE_OK;
2008 }
2009
2010 #ifdef NOVELL
2011 /*****************************************************************************
2012  *
2013  *      Function: rlm_ldap_postauth
2014  *
2015  *      Purpose: Perform eDirectory account policy check and failed-login reporting
2016  *      to eDirectory.
2017  *
2018  *****************************************************************************/
2019 static int ldap_postauth(void *instance, REQUEST * request)
2020 {
2021         int res = RLM_MODULE_FAIL;
2022         int inst_attr, apc_attr;
2023         char password[UNIVERSAL_PASS_LEN];
2024         ldap_instance  *inst = instance;
2025         LDAP_CONN       *conn;
2026         VALUE_PAIR *vp_inst, *vp_apc;
2027         DICT_ATTR *dattr;
2028
2029         dattr = dict_attrbyname("LDAP-Instance");
2030         inst_attr = dattr->attr;
2031         dattr = dict_attrbyname("eDir-APC");
2032         apc_attr = dattr->attr;
2033
2034         vp_inst = pairfind(request->config_items, inst_attr);
2035
2036         /*
2037          * Check if the password in the config items list is the user's UP which has
2038          * been read in the authorize method of this instance of the LDAP module.
2039          */
2040         if((vp_inst == NULL) || strcmp(vp_inst->vp_strvalue, inst->xlat_name))
2041                 return RLM_MODULE_NOOP;
2042
2043         vp_apc = pairfind(request->config_items, apc_attr);
2044
2045         switch(vp_apc->vp_strvalue[0]){
2046                 case '1':
2047                         /* Account policy check not enabled */
2048                 case '3':
2049                         /* Account policy check has been completed */
2050                         res = RLM_MODULE_NOOP;
2051                         break;
2052                 case '2':
2053                         {
2054                                 int err, conn_id = -1;
2055                                 char *error_msg = NULL;
2056                                 VALUE_PAIR *vp_fdn, *vp_pwd;
2057                                 DICT_ATTR *da;
2058
2059                                 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
2060                                   /* Bind to eDirectory as the RADIUS user with a wrong password. */
2061                                   vp_pwd = pairfind(request->config_items, PW_CLEARTEXT_PASSWORD);
2062                                   strcpy(password, vp_pwd->vp_strvalue);
2063                                   if (strlen(password) > 0) {
2064                                           if (password[0] != 'a') {
2065                                                   password[0] = 'a';
2066                                           } else {
2067                                                   password[0] = 'b';
2068                                           }
2069                                   } else {
2070                                           strcpy(password, "dummy_password");
2071                                   }
2072                                   res = RLM_MODULE_REJECT;
2073                                 } else {
2074                                         /* Bind to eDirectory as the RADIUS user using the user's UP */
2075                                         vp_pwd = pairfind(request->config_items, PW_CLEARTEXT_PASSWORD);
2076                                         if (vp_pwd == NULL) {
2077                                                 DEBUG("rlm_ldap: User's Universal Password not in config items list.");
2078                                                 return RLM_MODULE_FAIL;
2079                                         }
2080                                         strcpy(password, vp_pwd->vp_strvalue);
2081                                 }
2082
2083                                 if ((da = dict_attrbyname("Ldap-UserDn")) == NULL) {
2084                                         DEBUG("rlm_ldap: Attribute for user FDN not found in dictionary. Unable to proceed");
2085                                         return RLM_MODULE_FAIL;
2086                                 }
2087
2088                                 vp_fdn = pairfind(request->packet->vps, da->attr);
2089                                 if (vp_fdn == NULL) {
2090                                         DEBUG("rlm_ldap: User's FQDN not in config items list.");
2091                                         return RLM_MODULE_FAIL;
2092                                 }
2093
2094                                 if ((conn_id = ldap_get_conn(inst->apc_conns, &conn, inst)) == -1){
2095                                         radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
2096                                         return RLM_MODULE_FAIL;
2097                                 }
2098
2099                                 /*
2100                                  *      If there is an existing LDAP
2101                                  *      connection to the directory,
2102                                  *      bind over it. Otherwise,
2103                                  *      establish a new connection.
2104                                  */
2105                         postauth_reconnect:
2106                                 if (!conn->bound || conn->ld == NULL) {
2107                                         DEBUG2("rlm_ldap: attempting LDAP reconnection");
2108                                         if (conn->ld){
2109                                                 DEBUG2("rlm_ldap: closing existing LDAP connection");
2110                                                 ldap_unbind_s(conn->ld);
2111                                         }
2112                                         if ((conn->ld = ldap_connect(instance, (char *)vp_fdn->vp_strvalue, password, 0, &res, &error_msg)) == NULL) {
2113                                                 radlog(L_ERR, "rlm_ldap: eDirectory account policy check failed.");
2114
2115                                                 if (error_msg != NULL) {
2116                                                         DEBUG("rlm_ldap: %s", error_msg);
2117                                                         pairadd(&request->reply->vps, pairmake("Reply-Message", error_msg, T_OP_EQ));
2118                                                         ldap_memfree((void *)error_msg);
2119                                                 }
2120
2121                                                 vp_apc->vp_strvalue[0] = '3';
2122                                                 ldap_release_conn(conn_id, inst->apc_conns);
2123                                                 return RLM_MODULE_REJECT;
2124                                         }
2125                                         conn->bound = 1;
2126                                 } else if((err = ldap_simple_bind_s(conn->ld, (char *)vp_fdn->vp_strvalue, password)) != LDAP_SUCCESS) {
2127                                         if (err == LDAP_SERVER_DOWN) {
2128                                                 conn->bound = 0;
2129                                                 goto postauth_reconnect;
2130                                         }
2131                                         DEBUG("rlm_ldap: eDirectory account policy check failed.");
2132                                         ldap_get_option(conn->ld, LDAP_OPT_ERROR_STRING, &error_msg);
2133                                         if (error_msg != NULL) {
2134                                                 DEBUG("rlm_ldap: %s", error_msg);
2135                                                 pairadd(&request->reply->vps, pairmake("Reply-Message", error_msg, T_OP_EQ));
2136                                                 ldap_memfree((void *)error_msg);
2137                                         }
2138                                         vp_apc->vp_strvalue[0] = '3';
2139                                         ldap_release_conn(conn_id, inst->apc_conns);
2140                                         return RLM_MODULE_REJECT;
2141                                 }
2142                                 vp_apc->vp_strvalue[0] = '3';
2143                                 ldap_release_conn(conn_id, inst->apc_conns);
2144                                 return RLM_MODULE_OK;
2145                         }
2146         }
2147         return res;
2148 }
2149 #endif
2150
2151 static LDAP *ldap_connect(void *instance, const char *dn, const char *password,
2152                           int auth, int *result, char **err)
2153 {
2154         ldap_instance  *inst = instance;
2155         LDAP           *ld = NULL;
2156         int             msgid, rc, ldap_version;
2157         int             ldap_errno = 0;
2158         LDAPMessage    *res;
2159
2160         if (inst->is_url){
2161 #ifdef HAVE_LDAP_INITIALIZE
2162                 DEBUG("rlm_ldap: (re)connect to %s, authentication %d", inst->server, auth);
2163                 if (ldap_initialize(&ld, inst->server) != LDAP_SUCCESS) {
2164                         radlog(L_ERR, "rlm_ldap: ldap_initialize() failed");
2165                         *result = RLM_MODULE_FAIL;
2166                         return (NULL);
2167                 }
2168 #endif
2169         } else {
2170                 DEBUG("rlm_ldap: (re)connect to %s:%d, authentication %d", inst->server, inst->port, auth);
2171                 if ((ld = ldap_init(inst->server, inst->port)) == NULL) {
2172                         radlog(L_ERR, "rlm_ldap: ldap_init() failed");
2173                         *result = RLM_MODULE_FAIL;
2174                         return (NULL);
2175                 }
2176         }
2177         if (ldap_set_option(ld, LDAP_OPT_NETWORK_TIMEOUT,
2178                             (void *) &(inst->net_timeout)) != LDAP_OPT_SUCCESS) {
2179                 radlog(L_ERR, "rlm_ldap: Could not set LDAP_OPT_NETWORK_TIMEOUT %ld.%ld", inst->net_timeout.tv_sec, inst->net_timeout.tv_usec);
2180         }
2181
2182         if (ldap_set_option(ld, LDAP_OPT_TIMELIMIT,
2183                             (void *) &(inst->timelimit)) != LDAP_OPT_SUCCESS) {
2184                 radlog(L_ERR, "rlm_ldap: Could not set LDAP_OPT_TIMELIMIT %d", inst->timelimit);
2185         }
2186
2187         if (inst->ldap_debug && ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, &(inst->ldap_debug)) != LDAP_OPT_SUCCESS) {
2188                 radlog(L_ERR, "rlm_ldap: Could not set LDAP_OPT_DEBUG_LEVEL %d", inst->ldap_debug);
2189         }
2190
2191         ldap_version = LDAP_VERSION3;
2192         if (ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION,
2193                             &ldap_version) != LDAP_OPT_SUCCESS) {
2194                 radlog(L_ERR, "rlm_ldap: Could not set LDAP version to V3");
2195         }
2196
2197 #ifdef HAVE_LDAP_START_TLS
2198         if (inst->tls_mode) {
2199                 DEBUG("rlm_ldap: setting TLS mode to %d", inst->tls_mode);
2200                 if (ldap_set_option(ld, LDAP_OPT_X_TLS,
2201                                     (void *) &(inst->tls_mode)) != LDAP_OPT_SUCCESS) {
2202                         ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
2203                         radlog(L_ERR, "rlm_ldap: could not set LDAP_OPT_X_TLS option %s", ldap_err2string(ldap_errno));
2204                 }
2205         }
2206
2207         if (inst->tls_cacertfile != NULL) {
2208                 DEBUG("rlm_ldap: setting TLS CACert File to %s", inst->tls_cacertfile);
2209
2210                 if ( ldap_set_option( NULL, LDAP_OPT_X_TLS_CACERTFILE,
2211                                       (void *) inst->tls_cacertfile )
2212                      != LDAP_OPT_SUCCESS) {
2213                         radlog(L_ERR, "rlm_ldap: could not set "
2214                                "LDAP_OPT_X_TLS_CACERTFILE option to %s", inst->tls_cacertfile);
2215                 }
2216         }
2217
2218         if (inst->tls_cacertdir != NULL) {
2219                 DEBUG("rlm_ldap: setting TLS CACert Directory to %s", inst->tls_cacertdir);
2220
2221                 if ( ldap_set_option( NULL, LDAP_OPT_X_TLS_CACERTDIR,
2222                                       (void *) inst->tls_cacertdir )
2223                      != LDAP_OPT_SUCCESS) {
2224                         radlog(L_ERR, "rlm_ldap: could not set "
2225                                "LDAP_OPT_X_TLS_CACERTDIR option to %s", inst->tls_cacertdir);
2226                 }
2227         }
2228
2229         if (strcmp(TLS_DEFAULT_VERIFY, inst->tls_require_cert ) != 0 ) {
2230                 DEBUG("rlm_ldap: setting TLS Require Cert to %s",
2231                       inst->tls_require_cert);
2232         }
2233
2234
2235 #ifdef HAVE_LDAP_INT_TLS_CONFIG
2236         if (ldap_int_tls_config(NULL, LDAP_OPT_X_TLS_REQUIRE_CERT,
2237                                 (inst->tls_require_cert)) != LDAP_OPT_SUCCESS) {
2238                 radlog(L_ERR, "rlm_ldap: could not set "
2239                        "LDAP_OPT_X_TLS_REQUIRE_CERT option to %s",
2240                        inst->tls_require_cert);
2241         }
2242 #endif
2243
2244         if (inst->tls_certfile != NULL) {
2245                 DEBUG("rlm_ldap: setting TLS Cert File to %s", inst->tls_certfile);
2246
2247                 if (ldap_set_option(NULL, LDAP_OPT_X_TLS_CERTFILE,
2248                                     (void *) inst->tls_certfile)
2249                     != LDAP_OPT_SUCCESS) {
2250                         radlog(L_ERR, "rlm_ldap: could not set "
2251                                "LDAP_OPT_X_TLS_CERTFILE option to %s",
2252                                inst->tls_certfile);
2253                 }
2254         }
2255
2256         if (inst->tls_keyfile != NULL) {
2257                 DEBUG("rlm_ldap: setting TLS Key File to %s",
2258                       inst->tls_keyfile);
2259
2260                 if ( ldap_set_option( NULL, LDAP_OPT_X_TLS_KEYFILE,
2261                                       (void *) inst->tls_keyfile )
2262                      != LDAP_OPT_SUCCESS) {
2263                         radlog(L_ERR, "rlm_ldap: could not set "
2264                                "LDAP_OPT_X_TLS_KEYFILE option to %s",
2265                                inst->tls_keyfile);
2266                 }
2267         }
2268
2269         if (inst->tls_randfile != NULL) {
2270                 DEBUG("rlm_ldap: setting TLS Key File to %s",
2271                       inst->tls_randfile);
2272
2273                 if (ldap_set_option(NULL, LDAP_OPT_X_TLS_RANDOM_FILE,
2274                                     (void *) inst->tls_randfile)
2275                     != LDAP_OPT_SUCCESS) {
2276                         radlog(L_ERR, "rlm_ldap: could not set "
2277                                "LDAP_OPT_X_TLS_RANDOM_FILE option to %s",
2278                                inst->tls_randfile);
2279                 }
2280         }
2281
2282         if (inst->start_tls) {
2283                 DEBUG("rlm_ldap: starting TLS");
2284                 rc = ldap_start_tls_s(ld, NULL, NULL);
2285                 if (rc != LDAP_SUCCESS) {
2286                         DEBUG("rlm_ldap: ldap_start_tls_s()");
2287                         ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER,
2288                                         &ldap_errno);
2289                         radlog(L_ERR, "rlm_ldap: could not start TLS %s",
2290                                ldap_err2string(ldap_errno));
2291                         *result = RLM_MODULE_FAIL;
2292                         ldap_unbind_s(ld);
2293                         return (NULL);
2294                 }
2295         }
2296 #endif /* HAVE_LDAP_START_TLS */
2297
2298         if (inst->is_url){
2299                 DEBUG("rlm_ldap: bind as %s/%s to %s",
2300                       dn, password, inst->server);
2301         } else {
2302                 DEBUG("rlm_ldap: bind as %s/%s to %s:%d",
2303                       dn, password, inst->server, inst->port);
2304         }
2305
2306         msgid = ldap_bind(ld, dn, password,LDAP_AUTH_SIMPLE);
2307         if (msgid == -1) {
2308                 ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
2309                 if(err != NULL){
2310                         ldap_get_option(ld, LDAP_OPT_ERROR_STRING, err);
2311                 }
2312                 if (inst->is_url) {
2313                         radlog(L_ERR, "rlm_ldap: %s bind to %s failed: %s",
2314                                 dn, inst->server, ldap_err2string(ldap_errno));
2315                 } else {
2316                         radlog(L_ERR, "rlm_ldap: %s bind to %s:%d failed: %s",
2317                                 dn, inst->server, inst->port,
2318                                 ldap_err2string(ldap_errno));
2319                 }
2320                 *result = RLM_MODULE_FAIL;
2321                 ldap_unbind_s(ld);
2322                 return (NULL);
2323         }
2324         DEBUG("rlm_ldap: waiting for bind result ...");
2325
2326         rc = ldap_result(ld, msgid, 1, &(inst->timeout), &res);
2327
2328         if (rc < 1) {
2329                 DEBUG("rlm_ldap: ldap_result()");
2330                 ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
2331                 if(err != NULL){
2332                         ldap_get_option(ld, LDAP_OPT_ERROR_STRING, err);
2333                 }
2334                 if (inst->is_url) {
2335                         radlog(L_ERR, "rlm_ldap: %s bind to %s failed: %s",
2336                                 dn, inst->server, (rc == 0) ? "timeout" : ldap_err2string(ldap_errno));
2337                 } else {
2338                         radlog(L_ERR, "rlm_ldap: %s bind to %s:%d failed: %s",
2339                                dn, inst->server, inst->port,
2340                                 (rc == 0) ? "timeout" : ldap_err2string(ldap_errno));
2341                 }
2342                 *result = RLM_MODULE_FAIL;
2343                 ldap_unbind_s(ld);
2344                 return (NULL);
2345         }
2346
2347         ldap_errno = ldap_result2error(ld, res, 1);
2348         switch (ldap_errno) {
2349         case LDAP_SUCCESS:
2350                 DEBUG("rlm_ldap: Bind was successful");
2351                 *result = RLM_MODULE_OK;
2352                 break;
2353
2354         case LDAP_INVALID_CREDENTIALS:
2355                 if (auth){
2356                         DEBUG("rlm_ldap: Bind failed with invalid credentials");
2357                         *result = RLM_MODULE_REJECT;
2358                 } else {
2359                         radlog(L_ERR, "rlm_ldap: LDAP login failed: check identity, password settings in ldap section of radiusd.conf");
2360                         *result = RLM_MODULE_FAIL;
2361                 }
2362                 if(err != NULL){
2363                         ldap_get_option(ld, LDAP_OPT_ERROR_STRING, err);
2364                 }
2365                 break;
2366
2367         default:
2368                 if (inst->is_url) {
2369                         radlog(L_ERR,"rlm_ldap: %s bind to %s failed %s",
2370                                 dn, inst->server, ldap_err2string(ldap_errno));
2371                 } else {
2372                         radlog(L_ERR,"rlm_ldap: %s bind to %s:%d failed %s",
2373                                 dn, inst->server, inst->port,
2374                                 ldap_err2string(ldap_errno));
2375                 }
2376                 *result = RLM_MODULE_FAIL;
2377                 if(err != NULL){
2378                         ldap_get_option(ld, LDAP_OPT_ERROR_STRING, err);
2379                 }
2380         }
2381
2382         if (*result != RLM_MODULE_OK) {
2383                 ldap_unbind_s(ld);
2384                 ld = NULL;
2385         }
2386         return ld;
2387 }
2388
2389 /*****************************************************************************
2390  *
2391  *      Detach from the LDAP server and cleanup internal state.
2392  *
2393  *****************************************************************************/
2394 static int
2395 ldap_detach(void *instance)
2396 {
2397         ldap_instance  *inst = instance;
2398         TLDAP_RADIUS *pair, *nextpair;
2399
2400         if (inst->conns) {
2401                 int i;
2402
2403                 for (i = 0;i < inst->num_conns; i++) {
2404                         if (inst->conns[i].ld){
2405                                 ldap_unbind_s(inst->conns[i].ld);
2406                         }
2407                         pthread_mutex_destroy(&inst->conns[i].mutex);
2408                 }
2409                 free(inst->conns);
2410         }
2411
2412 #ifdef NOVELL
2413         if (inst->apc_conns){
2414                 int i;
2415
2416                 for (i = 0; i < inst->num_conns; i++) {
2417                         if (inst->apc_conns[i].ld){
2418                                 ldap_unbind_s(inst->apc_conns[i].ld);
2419                         }
2420                         pthread_mutex_destroy(&inst->apc_conns[i].mutex);
2421                 }
2422                 free(inst->apc_conns);
2423         }
2424 #endif
2425
2426         pair = inst->check_item_map;
2427
2428         while (pair != NULL) {
2429                 nextpair = pair->next;
2430                 free(pair->attr);
2431                 free(pair->radius_attr);
2432                 free(pair);
2433                 pair = nextpair;
2434         }
2435
2436         pair = inst->reply_item_map;
2437
2438         while (pair != NULL) {
2439                 nextpair = pair->next;
2440                 free(pair->attr);
2441                 free(pair->radius_attr);
2442                 free(pair);
2443                 pair = nextpair;
2444         }
2445
2446         if (inst->atts)
2447                 free(inst->atts);
2448
2449         paircompare_unregister(PW_LDAP_GROUP, ldap_groupcmp);
2450         xlat_unregister(inst->xlat_name,ldap_xlat);
2451         free(inst->xlat_name);
2452
2453         free(inst);
2454
2455         return 0;
2456 }
2457
2458
2459 #ifdef FIELDCPY
2460 static void
2461 fieldcpy(char *string, char **uptr)
2462 {
2463         char           *ptr;
2464
2465         ptr = *uptr;
2466         while (*ptr == ' ' || *ptr == '\t') {
2467                 ptr++;
2468         }
2469         if (*ptr == '"') {
2470                 ptr++;
2471                 while (*ptr != '"' && *ptr != '\0' && *ptr != '\n') {
2472                         *string++ = *ptr++;
2473                 }
2474                 *string = '\0';
2475                 if (*ptr == '"') {
2476                         ptr++;
2477                 }
2478                 *uptr = ptr;
2479                 return;
2480         }
2481         while (*ptr != ' ' && *ptr != '\t' && *ptr != '\0' && *ptr != '\n' &&
2482                *ptr != '=' && *ptr != ',') {
2483                 *string++ = *ptr++;
2484         }
2485         *string = '\0';
2486         *uptr = ptr;
2487         return;
2488 }
2489 #endif
2490
2491 /*
2492  *      Copied from src/lib/token.c
2493  */
2494 static const FR_NAME_NUMBER tokens[] = {
2495         { "=~", T_OP_REG_EQ,    }, /* order is important! */
2496         { "!~", T_OP_REG_NE,    },
2497         { "{",  T_LCBRACE,      },
2498         { "}",  T_RCBRACE,      },
2499         { "(",  T_LBRACE,       },
2500         { ")",  T_RBRACE,       },
2501         { ",",  T_COMMA,        },
2502         { "+=", T_OP_ADD,       },
2503         { "-=", T_OP_SUB,       },
2504         { ":=", T_OP_SET,       },
2505         { "=*", T_OP_CMP_TRUE,  },
2506         { "!*", T_OP_CMP_FALSE, },
2507         { "==", T_OP_CMP_EQ,    },
2508         { "=",  T_OP_EQ,        },
2509         { "!=", T_OP_NE,        },
2510         { ">=", T_OP_GE,        },
2511         { ">",  T_OP_GT,        },
2512         { "<=", T_OP_LE,        },
2513         { "<",  T_OP_LT,        },
2514         { NULL, 0}
2515 };
2516
2517 /*****************************************************************************
2518  *      Get RADIUS attributes from LDAP object
2519  *      ( according to draft-adoba-radius-05.txt
2520  *        <http://www.ietf.org/internet-drafts/draft-adoba-radius-05.txt> )
2521  *
2522  *****************************************************************************/
2523 static VALUE_PAIR *ldap_pairget(LDAP *ld, LDAPMessage *entry,
2524                                 TLDAP_RADIUS *item_map,
2525                                 VALUE_PAIR **pairs, int is_check)
2526 {
2527         char          **vals;
2528         int             vals_count;
2529         int             vals_idx;
2530         char           *ptr;
2531         char           *value;
2532         TLDAP_RADIUS   *element;
2533         FR_TOKEN      token, operator;
2534         int             is_generic_attribute;
2535         char            buf[MAX_STRING_LEN];
2536         VALUE_PAIR     *pairlist = NULL;
2537         VALUE_PAIR     *newpair = NULL;
2538         char            do_xlat = FALSE;
2539         char            print_buffer[2048];
2540
2541         /*
2542          *      check if there is a mapping from this LDAP attribute
2543          *      to a RADIUS attribute
2544          */
2545         for (element = item_map; element != NULL; element = element->next) {
2546                 /*
2547                  *      No mapping, skip it.
2548                  */
2549                 if ((vals = ldap_get_values(ld,entry,element->attr)) == NULL)
2550                         continue;
2551
2552                 /*
2553                  *      Check whether this is a one-to-one-mapped ldap
2554                  *      attribute or a generic attribute and set flag
2555                  *      accordingly.
2556                  */
2557                 if (strcasecmp(element->radius_attr, GENERIC_ATTRIBUTE_ID)==0)
2558                         is_generic_attribute = 1;
2559                 else
2560                         is_generic_attribute = 0;
2561
2562                 /*
2563                  *      Find out how many values there are for the
2564                  *      attribute and extract all of them.
2565                  */
2566                 vals_count = ldap_count_values(vals);
2567
2568                 for (vals_idx = 0; vals_idx < vals_count; vals_idx++) {
2569                         value = vals[vals_idx];
2570
2571                         if (is_generic_attribute) {
2572                                 /*
2573                                  *      This is a generic attribute.
2574                                  */
2575                                 FR_TOKEN dummy; /* makes pairread happy */
2576
2577                                 /* not sure if using pairread here is ok ... */
2578                                 if ( (newpair = pairread(&value, &dummy)) != NULL) {
2579                                         DEBUG("rlm_ldap: extracted attribute %s from generic item %s",
2580                                               newpair->name, vals[vals_idx]);
2581                                         pairadd(&pairlist, newpair);
2582                                 } else {
2583                                         radlog(L_ERR, "rlm_ldap: parsing %s failed: %s",
2584                                                element->attr, vals[vals_idx]);
2585                                 }
2586                         } else {
2587                                 /*
2588                                  *      This is a one-to-one-mapped attribute
2589                                  */
2590                                 ptr = value;
2591                                 operator = gettoken(&ptr, buf, sizeof(buf));
2592                                 if (operator < T_EQSTART || operator > T_EQEND) {
2593                                         /* no leading operator found */
2594                                         if (element->operator != T_OP_INVALID)
2595                                                 operator = element->operator;
2596                                         else if (is_check)
2597                                                 operator = T_OP_CMP_EQ;
2598                                         else
2599                                                 operator = T_OP_EQ;
2600                                 } else {
2601                                         /* the value is after the operator */
2602                                         value = ptr;
2603                                 }
2604
2605                                 /*
2606                                  *      Do xlat if the *entire* string
2607                                  *      is quoted.
2608                                  */
2609                                 if ((value[0] == '\'' || value[0] == '"' ||
2610                                      value[0] == '`') &&
2611                                     (value[0] == value[strlen(value)-1])) {
2612                                         ptr = value;
2613                                         token = gettoken(&ptr, buf, sizeof(buf));
2614                                         switch (token) {
2615                                         /* take the unquoted string */
2616                                         case T_SINGLE_QUOTED_STRING:
2617                                         case T_DOUBLE_QUOTED_STRING:
2618                                                 value = buf;
2619                                                 break;
2620
2621                                         /* the value will be xlat'ed later */
2622                                         case T_BACK_QUOTED_STRING:
2623                                                 value = buf;
2624                                                 do_xlat = TRUE;
2625                                                 break;
2626
2627                                         /* keep the original string */
2628                                         default:
2629                                                 break;
2630                                         }
2631                                 }
2632                                 if (value[0] == '\0') {
2633                                         DEBUG("rlm_ldap: Attribute %s has no value", element->attr);
2634                                         continue;
2635                                 }
2636
2637                                 /*
2638                                  *      Create the pair.
2639                                  */
2640                                 newpair = pairmake(element->radius_attr,
2641                                                    do_xlat ? NULL : value,
2642                                                    operator);
2643                                 if (newpair == NULL) {
2644                                         radlog(L_ERR, "rlm_ldap: Failed to create the pair: %s", librad_errstr);
2645                                         continue;
2646                                 }
2647
2648                                 if (do_xlat) {
2649                                         newpair->flags.do_xlat = 1;
2650                                         strlcpy(newpair->vp_strvalue, buf,
2651                                                 sizeof(newpair->vp_strvalue));
2652                                         newpair->length = 0;
2653                                 }
2654                                 vp_prints(print_buffer, sizeof(print_buffer),
2655                                           newpair);
2656                                 DEBUG("rlm_ldap: LDAP attribute %s as RADIUS attribute %s",
2657                                       element->attr, print_buffer);
2658
2659
2660                                 /*
2661                                  *      Add the pair into the packet.
2662                                  */
2663                                 if (!vals_idx){
2664                                         pairdelete(pairs, newpair->attribute);
2665                                 }
2666                                 pairadd(&pairlist, newpair);
2667                         }
2668                 }
2669                 ldap_value_free(vals);
2670         }
2671
2672         return (pairlist);
2673 }
2674
2675 /* globally exported name */
2676 module_t rlm_ldap = {
2677         RLM_MODULE_INIT,
2678         "LDAP",
2679         RLM_TYPE_THREAD_SAFE,   /* type: reserved        */
2680         ldap_instantiate,       /* instantiation         */
2681         ldap_detach,            /* detach                */
2682         {
2683                 ldap_authenticate,      /* authentication        */
2684                 ldap_authorize,         /* authorization         */
2685                 NULL,                   /* preaccounting         */
2686                 NULL,                   /* accounting            */
2687                 NULL,                   /* checksimul            */
2688                 NULL,                   /* pre-proxy             */
2689                 NULL,                   /* post-proxy            */
2690 #ifdef NOVELL
2691                 ldap_postauth           /* post-auth             */
2692 #else
2693                 NULL
2694 #endif
2695         },
2696 };