src/modules/rlm_ldap/rlm_ldap.c

   1 /*
   2  * rlm_ldap.c   LDAP authorization and authentication module.
   3  *
   4  *   This program is free software; you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as published by
   6  *   the Free Software Foundation; either version 2 of the License, or
   7  *   (at your option) any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program; if not, write to the Free Software
  16  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  *
  18  * This module is based on LDAP patch to Cistron radiusd by James Golovich
  19  * <james@wwnet.net>, which in turn was based mostly on a Mysql+Cistron patch
  20  * from <oyarzun@wilmington.net>
  21  *
  22  * 17 Jan 2000, Adrian Pavlykevych <pam@polynet.lviv.ua>
  23  *      - OpenLDAP SDK porting, basic TLS support, LDAP authorization,
  24  *        fault tolerance with multiple LDAP server support
  25  * 24 May 2000, Adrian Pavlykevych <pam@polynet.lviv.ua>
  26  *      - Converting to new configuration file format, futher improvements
  27  *        in fault tolerance, threaded operation
  28  * 12 Dec 2000, Adrian Pavlykevych <pam@polynet.lviv.ua>
  29  *      - Added preliminary support for multiple instances
  30  *      - moved all instance configuration into dynamicly allocated structure
  31  *      - Removed connection maintenance thread and all attempts for multihreading
  32  *        the module itself. OpenLDAP SDK is not thread safe when used with shared
  33  *        LDAP connection.
  34  *      - Added configuration option for defining LDAP attribute of user object,
  35  *        which controls remote access.
  36  * 16 Feb 2001, Hannu Laurila <hannu.laurila@japo.fi>
  37  *      - LDAP<->RADIUS attribute mappings are now read from a file
  38  *      - Support for generic RADIUS check and reply attribute.
  39  * Jun 2001, Kostas Kalevras <kkalev@noc.ntua.gr>
  40  *      - Fix: check and reply attributes from LDAP _replace_ existing ones
  41  *      - Added "default_profile" directive, which points to radiusProfile
  42  *        object, which contains default values for RADIUS users
  43  *      - Added "profile_attribute" directive, which specifies user object
  44  *        attribute pointing to radiusProfile object.
  45  * Nov 2001, Kostas Kalevras <kkalev@noc.ntua.gr>
  46  *      - Added support for adding the user password to the check. Based on
  47  *        the password_header directive rlm_ldap will strip the
  48  *        password header if needed. This will make support for CHAP much easier.
  49  *      - Added module messages when we reject a user.
  50  *      - Added ldap_groupcmp to allow searching for user group membership.
  51  *      - Added ldap_xlat to allow ldap urls in xlat strings. Something like:
  52  *        %{ldap:ldap:///dc=company,dc=com?cn?sub?uid=user}
  53  * Nov 2001, Gordon Tetlow <gordont@gnf.org>
  54  *      - Do an xlat on the access_group attribute.
  55  * Dec 2001, Kostas Kalevras <kkalev@noc.ntua.gr>
  56  *      - Added ldap caching for the default/regular profiles and group entries.
  57  *      - Fixed a memory leak in ldap_xlat.
  58  *      - Removed dict_attrbyname from ldap_pairget. They are not needed.
  59  *      - Moved the radius_xlat's for filter and basedn in ldap_authenticate() to
  60  *        the right place.
  61  *      - Made the module thread safe. We create a connection pool and each thread
  62  *        will call ldap_get_conn to lock one of the ldap connections and release with
  63  *        a call to ldap_release_conn when it has finished.
  64  *      - Request only the user attributes that interest us (radius attributes,regular
  65  *        profile,user password and access attribute).
  66  * Mar 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
  67  *      - Fixed a bug where the ldap server will kill the idle connections from the ldap
  68  *        connection pool. We now check if ldap_search returns LDAP_SERVER_DOWN and try to
  69  *        reconnect if it does. Bug noted by Dan Perik <dan_perik-work@ntm.org.pg>
  70  * May 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
  71  *      - Instead of the Group attribute we now have the Ldap-Group attribute, to avoid
  72  *        collisions with other modules
  73  *      - If perform_search fails check the ld != NULL before using it. Based on a bug report
  74  *        by John <jhogenmiller@pennswoods.net>
  75  * Jun 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
  76  *      - Add the ability to do a paircmp on the check items. Add a compare_check_items boolean
  77  *        configuration directive which defaults to no. If it is set then we will do a compare
  78  *      - Add another configuration directive. access_attr_used_for_allow. If it is set to yes
  79  *        then the access_attr will be used to allow user access. If it is set to no then it will
  80  *        be used to deny user access.
  81  *      - Remember to free inst->atts in ldap_detach()
  82  *      - Add a forgotten ldap_free_urldesc in ldap_xlat()
  83  *      - Add a variable locked in the LDAP_CONN structure. We use this to avoid deadlocks. The mutex
  84  *        we are using is of type fast and can deadlock if the same thread tries to relock it. That
  85  *        could happen in case of calls to xlat.
  86  *      - When ldap_search returns NO_SUCH_OBJECT don't return fail but notfound
  87  * Jul 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
  88  *      - Fix the logic when we get an LDAP_SERVER_DOWN or we have conn->ld == NULL in perform_search
  89  *      - Try to minimize the penalty of having the ldap server go down. The comments before
  90  *        MAX_FAILED_CONNS_* definitions should explain things.
  91  *      - Check for a number of error codes from ldap_search and log corresponding error messages
  92  *        We should only reconnect when that can help things.
  93  *      - In ldap_groupcmp instead of first searching for the group object and then checking user
  94  *        group membership combine them in one ldap search operation. That should make group
  95  *        membership checks a lot faster.
  96  *      - Remember to do ldap_release_conn and ldap_msgfree when we do paircmp and the result is reject
  97  * Aug 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
  98  *      - Add support for group membership attribute inside the user entry in ldap_groupcmp. The attribute
  99  *        can either contain the name or the DN of the group. Added the groupmembership_attribute
 100  *        configuration directive
 101  *      - Move the ldap_{get,release}_conn in ldap_groupcmp so that we hold a connection for the minimum time.
 102  *      - Now that ldap_groupcmp is complete we really don't need access_group. Removed it.
 103  *      - Remember to free groupmembership_attribute in ldap_detach
 104  *      - Don't delete existing generic attributes in ldap_pairget when adding new ones. Since generic attributes
 105  *        have operators we don't need to try to be cleaver.
 106  * Sep 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
 107  *      - Fix a crash in ldap_pairget when the attribute value is larger than the buffer size
 108  *        Bug report by Stefan Radovanovici <sra@rtsffm.com>
 109  *      - If we add a check item then use the == operator. Based on an idea by Allister Maguire <amaguire@gnc.net.nz>
 110  *      - Only add a failure message for bind as user failed in ldap_authenticate if the result of ldap_connect was
 111  *        RLM_MODULE_REJECT
 112  *      - Make tls_mode a configurable option. Patch from John <jhogenmiller@pennswoods.net>
 113  *      - Allow multiple regular profiles for an entry
 114  * Oct 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
 115  *      - Disable cache after searching for the default profile
 116  *      - Use the MAX_FAILED_CONNS_* in ldap_authenticate() when calling ldap_connect()
 117  * Nov 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
 118  *      - Set LDAP version to V3 before binding. Now freeradius should work with openldap21
 119  * Dec 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
 120  *      - Set default values for the server and basedn parameters
 121  * Feb 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
 122  *      - Add support for ldap_initialize. That way we can specify the server as an ldap url.
 123  *        Based on ideas from Derrik Pates <dpates@dsdk12.net>
 124  * Mar 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
 125  *      - Add an ldap_escape_func. Escape the * character from the filter so that we can avoid
 126  *        the trivial DoS of username=*
 127  *      - Remove the caching code. It does not exist in openldap21.
 128  *        Based on a report from Mike Denka <mdenk@whidbey.net>
 129  * May 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
 130  *      - Don't do a double free on the attribute maps. Bug noted by Derrik Pates <dpates@dsdk12.net>
 131  *      - Apply a patch from Alexander M. Pravking <fduch@antar.bryansk.ru> to do an xlat on the
 132  *        retrieved attributes.
 133  * Aug 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
 134  *      - In case of a bad search filter, print out the corresponding filter
 135  * Sep 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
 136  *      - Compile even if we don't have pthread's
 137  * Oct 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
 138  *      - Add a new configuration directive, base_filter which is used for base scope searches
 139  *        (When searching for the default/regular profiles for example)
 140  * Nov 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
 141  *      - Add a new configuration directive, do_xlat (default: yes). If set we use pairxlatmove
 142  *        on the radius attributes, else we fall back to the plain old pairadd. That way people
 143  *        can fall back on the 0.8.1 behaviour without making changes to their ldap database or
 144  *        gain a little performance by not using pairxlatmove
 145  * Dec 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
 146  *      - Add a patch from Jon Miner <miner@doit.wisc.edu> to add the ability to configure
 147  *        various LDAP TLS options
 148  *      - Only call pairfree if we are using pairxlatmove not for pairadd
 149  * Mar 2004, Kostas Kalevras <kkalev@noc.ntua.gr>
 150  *      - If we are passed an empty password log a module failure message not an error message
 151  * Apr 2004, Kostas Kalveras <kkalev@noc.ntua.gr>
 152  *      - Add a patch from Tarun Bhushan <tarun.bhushan@macquarie.com> to add a tls_mode boolean
 153  *        directive so that we can enable TLS connetions even if port is not set to 636
 154  *      - Add an error message if ldap_initialize() is not available and we are passed a URL like
 155  *        'server' directive.
 156  *      - Add a per instance Ldap-Group attribute (of the form <instance>-Ldap-Group) and register
 157  *        a corresponding ldap_groupcmp function
 158  *      - Small change to ldap_get_conn to fix problems on some platforms
 159  */
 160 static const char rcsid[] = "$Id$";
 161
 162 #include "autoconf.h"
 163
 164 #include        <sys/types.h>
 165 #include        <sys/socket.h>
 166 #include        <sys/time.h>
 167 #include        <netinet/in.h>
 168
 169 #include        <stdio.h>
 170 #include        <stdlib.h>
 171 #include        <netdb.h>
 172 #include        <pwd.h>
 173 #include        <time.h>
 174 #include        <ctype.h>
 175 #include        <string.h>
 176
 177 #include        <lber.h>
 178 #include        <ldap.h>
 179
 180 #include        <errno.h>
 181 #include        <unistd.h>
 182 #include        <pthread.h>
 183
 184 #include        "libradius.h"
 185 #include        "radiusd.h"
 186 #include        "conffile.h"
 187 #include        "modules.h"
 188 #include        "rad_assert.h"
 189
 190 #ifndef HAVE_PTHREAD_H
 191 /*
 192  *      This is a lot simpler than putting ifdef's around
 193  *      every use of the pthread functions.
 194  */
 195 #define pthread_mutex_lock(a)
 196 #define pthread_mutex_trylock(a) (0)
 197 #define pthread_mutex_unlock(a)
 198 #define pthread_mutex_init(a,b)
 199 #define pthread_mutex_destroy(a)
 200 #endif
 201
 202
 203 #define MAX_FILTER_STR_LEN      1024
 204 #define TIMELIMIT 5
 205
 206 /*
 207  * These are used in case ldap_search returns LDAP_SERVER_DOWN
 208  * In that case we do conn->failed_conns++ and then check it:
 209  * If conn->failed_conns <= MAX_FAILED_CONNS_START then we try
 210  * to reconnect
 211  * conn->failed_conns is also checked on entrance in perform_search:
 212  * If conn->failed_conns > MAX_FAILED_CONNS_START then we don't
 213  * try to do anything and we just do conn->failed_conns++ and
 214  * return RLM_MODULE_FAIL
 215  * if conn->failed_conns >= MAX_FAILED_CONNS_END then we give it
 216  * another chance and we set it to MAX_FAILED_CONNS_RESTART and
 217  * try to reconnect.
 218  *
 219  *
 220  * We are assuming that the majority of the LDAP_SERVER_DOWN cases
 221  * will either be an ldap connection timeout or a temporary ldap
 222  * server problem.
 223  * As a result we make a few attempts to reconnect hoping that the problem
 224  * will soon go away. If it does not go away then we just return
 225  * RLM_MODULE_FAIL on entrance in perform_search until conn->failed_conns
 226  * gets to MAX_FAILED_CONNS_END. After that we give it one more chance by
 227  * going back to MAX_FAILED_CONNS_RESTART
 228  *
 229  */
 230
 231 #define MAX_FAILED_CONNS_END            20
 232 #define MAX_FAILED_CONNS_RESTART        4
 233 #define MAX_FAILED_CONNS_START          5
 234
 235 #ifdef NOVELL_UNIVERSAL_PASSWORD
 236
 237 /* Universal Password Length */
 238 #define UNIVERSAL_PASS_LEN 256
 239
 240 int nmasldap_get_password(
 241         LDAP     *ld,
 242         char     *objectDN,
 243         size_t   *pwdSize,      /* in bytes */
 244         char     *pwd );
 245
 246 #endif
 247
 248 /* linked list of mappings between RADIUS attributes and LDAP attributes */
 249 struct TLDAP_RADIUS {
 250         char*                 attr;
 251         char*                 radius_attr;
 252         struct TLDAP_RADIUS*  next;
 253 };
 254 typedef struct TLDAP_RADIUS TLDAP_RADIUS;
 255
 256 typedef struct ldap_conn {
 257         LDAP            *ld;
 258         char            bound;
 259         char            locked;
 260         int             failed_conns;
 261 #ifdef HAVE_PTHREAD_H
 262         pthread_mutex_t mutex;
 263 #endif
 264 } LDAP_CONN;
 265
 266 typedef struct {
 267         char           *server;
 268         int             port;
 269         int             timelimit;
 270         struct timeval  net_timeout;
 271         struct timeval  timeout;
 272         int             debug;
 273         int             tls_mode;
 274         int             start_tls;
 275         int             num_conns;
 276         int             do_comp;
 277         int             do_xlat;
 278         int             default_allow;
 279         int             failed_conns;
 280         int             is_url;
 281         char           *login;
 282         char           *password;
 283         char           *filter;
 284         char           *base_filter;
 285         char           *basedn;
 286         char           *default_profile;
 287         char           *profile_attr;
 288         char           *access_attr;
 289         char           *passwd_hdr;
 290         char           *passwd_attr;
 291         char           *dictionary_mapping;
 292         char           *groupname_attr;
 293         char           *groupmemb_filt;
 294         char           *groupmemb_attr;
 295         char            **atts;
 296         TLDAP_RADIUS   *check_item_map;
 297         TLDAP_RADIUS   *reply_item_map;
 298         LDAP_CONN       *conns;
 299 #ifdef NOVELL
 300         LDAP_CONN *apc_conns;
 301 #endif
 302         int             ldap_debug; /* Debug flag for LDAP SDK */
 303         char            *xlat_name; /* name used to xlat */
 304         char            *tls_cacertfile;
 305         char            *tls_cacertdir;
 306         char            *tls_certfile;
 307         char            *tls_keyfile;
 308         char            *tls_randfile;
 309         char            *tls_require_cert;
 310 #ifdef NOVELL
 311         int                     edir_account_policy_check;
 312 #endif
 313         int             set_auth_type;
 314 }               ldap_instance;
 315
 316 /* The default setting for TLS Certificate Verification */
 317 #define TLS_DEFAULT_VERIFY "allow"
 318
 319 static CONF_PARSER module_config[] = {
 320         {"server", PW_TYPE_STRING_PTR, offsetof(ldap_instance,server), NULL, "localhost"},
 321         {"port", PW_TYPE_INTEGER, offsetof(ldap_instance,port), NULL, "389"},
 322         /* wait forever on network activity */
 323         {"net_timeout", PW_TYPE_INTEGER, offsetof(ldap_instance,net_timeout.tv_sec), NULL, "10"},
 324         /* wait forever for search results */
 325         {"timeout", PW_TYPE_INTEGER, offsetof(ldap_instance,timeout.tv_sec), NULL, "20"},
 326         /* allow server unlimited time for search (server-side limit) */
 327         {"timelimit", PW_TYPE_INTEGER, offsetof(ldap_instance,timelimit), NULL, "20"},
 328         {"identity", PW_TYPE_STRING_PTR, offsetof(ldap_instance,login), NULL, ""},
 329         {"tls_mode", PW_TYPE_BOOLEAN, offsetof(ldap_instance,tls_mode), NULL, "no"},
 330         {"start_tls", PW_TYPE_BOOLEAN, offsetof(ldap_instance,start_tls), NULL, "no"},
 331         {"tls_cacertfile", PW_TYPE_STRING_PTR, offsetof(ldap_instance,tls_cacertfile), NULL, NULL},
 332         {"tls_cacertdir", PW_TYPE_STRING_PTR, offsetof(ldap_instance,tls_cacertdir), NULL, NULL},
 333         {"tls_certfile", PW_TYPE_STRING_PTR, offsetof(ldap_instance,tls_certfile), NULL, NULL},
 334         {"tls_keyfile", PW_TYPE_STRING_PTR, offsetof(ldap_instance,tls_keyfile), NULL, NULL},
 335         {"tls_randfile", PW_TYPE_STRING_PTR, offsetof(ldap_instance,tls_randfile), NULL, NULL},
 336         {"tls_require_cert", PW_TYPE_STRING_PTR, offsetof(ldap_instance,tls_require_cert), NULL, TLS_DEFAULT_VERIFY},
 337         {"password", PW_TYPE_STRING_PTR, offsetof(ldap_instance,password), NULL, ""},
 338         {"basedn", PW_TYPE_STRING_PTR, offsetof(ldap_instance,basedn), NULL, "o=notexist"},
 339         {"filter", PW_TYPE_STRING_PTR, offsetof(ldap_instance,filter), NULL, "(uid=%u)"},
 340         {"base_filter", PW_TYPE_STRING_PTR, offsetof(ldap_instance,base_filter), NULL, "(objectclass=radiusprofile)"},
 341         {"default_profile", PW_TYPE_STRING_PTR, offsetof(ldap_instance,default_profile), NULL, NULL},
 342         {"profile_attribute", PW_TYPE_STRING_PTR, offsetof(ldap_instance,profile_attr), NULL, NULL},
 343         {"password_header", PW_TYPE_STRING_PTR, offsetof(ldap_instance,passwd_hdr), NULL, NULL},
 344         {"password_attribute", PW_TYPE_STRING_PTR, offsetof(ldap_instance,passwd_attr), NULL, NULL},
 345         /* LDAP attribute name that controls remote access */
 346         {"access_attr", PW_TYPE_STRING_PTR, offsetof(ldap_instance,access_attr), NULL, NULL},
 347         /* file with mapping between LDAP and RADIUS attributes */
 348         {"groupname_attribute", PW_TYPE_STRING_PTR, offsetof(ldap_instance,groupname_attr), NULL, "cn"},
 349         {"groupmembership_filter", PW_TYPE_STRING_PTR, offsetof(ldap_instance,groupmemb_filt), NULL, "(|(&(objectClass=GroupOfNames)(member=%{Ldap-UserDn}))(&(objectClass=GroupOfUniqueNames)(uniquemember=%{Ldap-UserDn})))"},
 350         {"groupmembership_attribute", PW_TYPE_STRING_PTR, offsetof(ldap_instance,groupmemb_attr), NULL, NULL},
 351         {"dictionary_mapping", PW_TYPE_STRING_PTR, offsetof(ldap_instance,dictionary_mapping), NULL, "${confdir}/ldap.attrmap"},
 352         {"ldap_debug", PW_TYPE_INTEGER, offsetof(ldap_instance,ldap_debug), NULL, "0x0000"},
 353         {"ldap_connections_number", PW_TYPE_INTEGER, offsetof(ldap_instance,num_conns), NULL, "5"},
 354         {"compare_check_items", PW_TYPE_BOOLEAN, offsetof(ldap_instance,do_comp), NULL, "no"},
 355         {"access_attr_used_for_allow", PW_TYPE_BOOLEAN, offsetof(ldap_instance,default_allow), NULL, "yes"},
 356         {"do_xlat", PW_TYPE_BOOLEAN, offsetof(ldap_instance,do_xlat), NULL, "yes"},
 357 #ifdef NOVELL
 358         {"edir_account_policy_check", PW_TYPE_BOOLEAN, offsetof(ldap_instance,edir_account_policy_check), NULL, "yes"},
 359 #endif
 360
 361         {"set_auth_type", PW_TYPE_BOOLEAN, offsetof(ldap_instance,set_auth_type), NULL, "yes"},
 362         {NULL, -1, 0, NULL, NULL}
 363 };
 364
 365 #define ld_valid                ld_options.ldo_valid
 366 #define LDAP_VALID_SESSION      0x2
 367 #define LDAP_VALID(ld)  ( (ld)->ld_valid == LDAP_VALID_SESSION )
 368
 369 #ifdef FIELDCPY
 370 static void     fieldcpy(char *, char **);
 371 #endif
 372 static VALUE_PAIR *ldap_pairget(LDAP *, LDAPMessage *, TLDAP_RADIUS *,VALUE_PAIR **,char);
 373 static int ldap_groupcmp(void *, REQUEST *, VALUE_PAIR *, VALUE_PAIR *, VALUE_PAIR *, VALUE_PAIR **);
 374 static int ldap_xlat(void *, REQUEST *, char *, char *, size_t, RADIUS_ESCAPE_STRING);
 375 static LDAP    *ldap_connect(void *instance, const char *, const char *, int, int *, char **);
 376 static int     read_mappings(ldap_instance* inst);
 377
 378 static inline int ldap_get_conn(LDAP_CONN *conns,LDAP_CONN **ret,void *instance)
 379 {
 380         ldap_instance *inst = instance;
 381         register int i = 0;
 382
 383         for(i=0;i<inst->num_conns;i++){
 384                 DEBUG("rlm_ldap: ldap_get_conn: Checking Id: %d",i);
 385                 if (conns[i].locked == 0 && pthread_mutex_trylock(&(conns[i].mutex)) == 0){
 386                         *ret = &conns[i];
 387                         conns[i].locked = 1;
 388                         DEBUG("rlm_ldap: ldap_get_conn: Got Id: %d",i);
 389                         return i;
 390                 }
 391         }
 392
 393         return -1;
 394 }
 395
 396 static inline void ldap_release_conn(int i, LDAP_CONN *conns)
 397 {
 398         DEBUG("rlm_ldap: ldap_release_conn: Release Id: %d",i);
 399         conns[i].locked = 0;
 400         pthread_mutex_unlock(&(conns[i].mutex));
 401 }
 402
 403 /*************************************************************************
 404  *
 405  *      Function: rlm_ldap_instantiate
 406  *
 407  *      Purpose: Uses section of radiusd config file passed as parameter
 408  *               to create an instance of the module.
 409  *
 410  *************************************************************************/
 411 static int
 412 ldap_instantiate(CONF_SECTION * conf, void **instance)
 413 {
 414         ldap_instance  *inst;
 415         int i = 0;
 416         int atts_num = 0;
 417         int reply_map_num = 0;
 418         int check_map_num = 0;
 419         int att_map[3] = {0,0,0};
 420         TLDAP_RADIUS *pair;
 421         ATTR_FLAGS flags;
 422         char *xlat_name;
 423         DICT_VALUE *dv;
 424
 425         inst = rad_malloc(sizeof *inst);
 426         if (!inst) {
 427                 return -1;
 428         }
 429         memset(inst, 0, sizeof(*inst));
 430
 431         if (cf_section_parse(conf, inst, module_config) < 0) {
 432                 free(inst);
 433                 return -1;
 434         }
 435
 436         if (inst->server == NULL) {
 437                 radlog(L_ERR, "rlm_ldap: missing 'server' directive.");
 438                 free(inst);
 439                 return -1;
 440         }
 441         inst->is_url = 0;
 442         if (ldap_is_ldap_url(inst->server)){
 443 #ifdef HAVE_LDAP_INITIALIZE
 444                 inst->is_url = 1;
 445                 inst->port = 0;
 446 #else
 447                 radlog(L_ERR, "rlm_ldap: 'server' directive is in URL form but ldap_initialize() is not available.");
 448                 free(inst);
 449                 return -1;
 450 #endif
 451         }
 452
 453         inst->timeout.tv_usec = 0;
 454         inst->net_timeout.tv_usec = 0;
 455         /* workaround for servers which support LDAPS but not START TLS */
 456         if(inst->port == LDAPS_PORT || inst->tls_mode)
 457                 inst->tls_mode = LDAP_OPT_X_TLS_HARD;
 458         else
 459                 inst->tls_mode = 0;
 460         inst->reply_item_map = NULL;
 461         inst->check_item_map = NULL;
 462         inst->conns = NULL;
 463         inst->failed_conns = 0;
 464
 465         DEBUG("rlm_ldap: Registering ldap_groupcmp for Ldap-Group");
 466         paircompare_register(PW_LDAP_GROUP, PW_USER_NAME, ldap_groupcmp, inst);
 467
 468         xlat_name = cf_section_name2(conf);
 469         if (xlat_name != NULL){
 470                 char *group_name;
 471                 DICT_ATTR *dattr;
 472
 473                 /*
 474                  * Allocate room for <instance>-Ldap-Group
 475                  */
 476                 group_name = malloc((strlen(xlat_name) + 1 + 11) * sizeof(char));
 477                 rad_assert(group_name != NULL);
 478                 sprintf(group_name,"%s-Ldap-Group",xlat_name);
 479                 DEBUG("rlm_ldap: Creating new attribute %s",group_name);
 480                 dict_addattr(group_name, 0, PW_TYPE_STRING, -1, flags);
 481                 dattr = dict_attrbyname(group_name);
 482                 if (dattr == NULL){
 483                         radlog(L_ERR, "rlm_ldap: Failed to create attribute %s",group_name);
 484                         free(inst);
 485                         return -1;
 486                 }
 487                 DEBUG("rlm_ldap: Registering ldap_groupcmp for %s",group_name);
 488                 paircompare_register(dattr->attr, PW_USER_NAME, ldap_groupcmp, inst);
 489         }
 490         else {
 491                 xlat_name = cf_section_name1(conf);
 492                 rad_assert(xlat_name != NULL); /* or all hell breaks loose */
 493         }
 494         inst->xlat_name = strdup(xlat_name);
 495         DEBUG("rlm_ldap: Registering ldap_xlat with xlat_name %s",xlat_name);
 496         xlat_register(xlat_name,ldap_xlat,inst);
 497
 498         /*
 499          *      Over-ride set_auth_type if there's no Auth-Type of our name.
 500          *      This automagically catches the case where LDAP is listed
 501          *      in "authorize", but not "authenticate".
 502          */
 503         dv = dict_valbyname(PW_AUTH_TYPE, xlat_name);
 504         if (!dv) {
 505                 if (inst->set_auth_type) {
 506                         DEBUG2("rlm_ldap: Over-riding set_auth_type, as we're not listed in the \"authenticate\" section.");
 507                 }
 508           inst->set_auth_type = 0;
 509         }
 510
 511 #ifdef NOVELL
 512         /*
 513          * (LDAP_Instance, V1) attribute-value pair in the config items list means
 514          * that the 'authorize' method of the instance 'V1' of the LDAP module has
 515          * processed this request.
 516          */
 517         dict_addattr("LDAP-Instance", 0, PW_TYPE_STRING, -1, flags);
 518         /*
 519          * ('eDir-APC', '1') in config items list => Do not perform eDirectory account
 520          *                                           policy check (APC)
 521          * ('eDir-APC', '2') in config items list => Perform eDirectory APC
 522          * ('eDir-APC', '3') in config items list => eDirectory APC has been completed
 523          */
 524         dict_addattr("eDir-APC", 0, PW_TYPE_INTEGER, -1, flags);
 525 #endif
 526
 527         if (inst->num_conns <= 0){
 528                 radlog(L_ERR, "rlm_ldap: Invalid ldap connections number passed.");
 529                 free(inst);
 530                 return -1;
 531         }
 532         inst->conns = (LDAP_CONN *)malloc(sizeof(LDAP_CONN)*inst->num_conns);
 533         if (inst->conns == NULL){
 534                 radlog(L_ERR, "rlm_ldap: Could not allocate memory. Aborting.");
 535                 free(inst);
 536                 return -1;
 537         }
 538         for(;i<inst->num_conns;i++){
 539                 inst->conns[i].bound = 0;
 540                 inst->conns[i].locked = 0;
 541                 inst->conns[i].failed_conns = 0;
 542                 inst->conns[i].ld = NULL;
 543                 pthread_mutex_init(&inst->conns[i].mutex, NULL);
 544         }
 545
 546 #ifdef NOVELL
 547         /*
 548          * 'inst->apc_conns' is a separate connection pool to be used for performing
 549          * eDirectory account policy check in the 'postauth' method. This avoids
 550          * changing the (RADIUS server) credentials associated with the 'inst->conns'
 551          * connection pool.
 552          */
 553         inst->apc_conns = (LDAP_CONN *)malloc(sizeof(LDAP_CONN)*inst->num_conns);
 554         if (inst->apc_conns == NULL){
 555                 radlog(L_ERR, "rlm_ldap: Could not allocate memory. Aborting.");
 556                 free(inst);
 557                 return -1;
 558         }
 559         for(i = 0; i < inst->num_conns; i++){
 560                 inst->apc_conns[i].bound = 0;
 561                 inst->apc_conns[i].locked = 0;
 562                 inst->apc_conns[i].failed_conns = 0;
 563                 inst->apc_conns[i].ld = NULL;
 564                 pthread_mutex_init(&inst->apc_conns[i].mutex, NULL);
 565         }
 566 #endif
 567
 568         if (read_mappings(inst) != 0) {
 569                 radlog(L_ERR, "rlm_ldap: Reading dictionary mappings from file %s failed",
 570                        inst->dictionary_mapping);
 571                 free(inst);
 572                 return -1;
 573         }
 574         if (inst->check_item_map == NULL && inst->reply_item_map == NULL){
 575                 radlog(L_ERR, "rlm_ldap: dictionary mappings file %s did not contain any mappings",
 576                         inst->dictionary_mapping);
 577                 free(inst);
 578                 return -1;
 579         }
 580
 581         pair = inst->check_item_map;
 582         while(pair != NULL){
 583                 atts_num++;
 584                 pair = pair->next;
 585         }
 586         check_map_num = (atts_num - 1);
 587         pair = inst->reply_item_map;
 588         while(pair != NULL){
 589                 atts_num++;
 590                 pair = pair->next;
 591         }
 592         reply_map_num = (atts_num - 1);
 593         if (inst->profile_attr)
 594                 atts_num++;
 595         if (inst->passwd_attr)
 596                 atts_num++;
 597         if (inst->access_attr)
 598                 atts_num++;
 599         inst->atts = (char **)malloc(sizeof(char *)*(atts_num + 1));
 600         if (inst->atts == NULL){
 601                 radlog(L_ERR, "rlm_ldap: Could not allocate memory. Aborting.");
 602                 free(inst);
 603                 return -1;
 604         }
 605         pair = inst->check_item_map;
 606         if (pair == NULL)
 607                 pair = inst->reply_item_map;
 608         for(i=0;i<atts_num;i++){
 609                 if (i <= check_map_num ){
 610                         inst->atts[i] = pair->attr;
 611                         if (i == check_map_num)
 612                                 pair = inst->reply_item_map;
 613                         else
 614                                 pair = pair->next;
 615                 }
 616                 else if (i <= reply_map_num){
 617                         inst->atts[i] = pair->attr;
 618                         pair = pair->next;
 619                 }
 620                 else{
 621                         if (inst->profile_attr && !att_map[0]){
 622                                 inst->atts[i] = inst->profile_attr;
 623                                 att_map[0] = 1;
 624                         }
 625                         else if (inst->passwd_attr && !att_map[1]){
 626                                 inst->atts[i] = inst->passwd_attr;
 627                                 att_map[1] = 1;
 628                         }
 629                         else if (inst->access_attr && !att_map[2]){
 630                                 inst->atts[i] = inst->access_attr;
 631                                 att_map[2] = 1;
 632                         }
 633                 }
 634         }
 635         inst->atts[atts_num] = NULL;
 636
 637         DEBUG("conns: %p",inst->conns);
 638
 639         *instance = inst;
 640
 641
 642         return 0;
 643 }
 644
 645
 646 /*
 647  * read_mappings(...) reads a ldap<->radius mappings file to inst->reply_item_map and inst->check_item_map
 648  */
 649
 650 #define MAX_LINE_LEN 160
 651 #define GENERIC_ATTRIBUTE_ID "$GENERIC$"
 652
 653 static int
 654 read_mappings(ldap_instance* inst)
 655 {
 656         FILE* mapfile;
 657         char *filename;
 658         /* all buffers are of MAX_LINE_LEN so we can use sscanf without being afraid of buffer overflows */
 659         char buf[MAX_LINE_LEN], itemType[MAX_LINE_LEN], radiusAttribute[MAX_LINE_LEN], ldapAttribute[MAX_LINE_LEN];
 660         int linenumber;
 661
 662         /* open the mappings file for reading */
 663
 664         filename = inst->dictionary_mapping;
 665         DEBUG("rlm_ldap: reading ldap<->radius mappings from file %s", filename);
 666         mapfile = fopen(filename, "r");
 667
 668         if (mapfile == NULL) {
 669                 radlog(L_ERR, "rlm_ldap: Opening file %s failed", filename);
 670                 return -1; /* error */
 671         }
 672
 673         /* read file line by line. Note that if line length exceed MAX_LINE_LEN, line numbers will be mixed up */
 674
 675         linenumber = 0;
 676
 677         while (fgets(buf, sizeof buf, mapfile)!=NULL) {
 678                 char* ptr;
 679                 int token_count;
 680                 TLDAP_RADIUS* pair;
 681
 682                 linenumber++;
 683
 684                 /* strip comments */
 685                 ptr = strchr(buf, '#');
 686                 if (ptr) *ptr = 0;
 687
 688                 /* empty line */
 689                 if (buf[0] == 0) continue;
 690
 691                 /* extract tokens from the string */
 692                 token_count = sscanf(buf, "%s %s %s", itemType, radiusAttribute, ldapAttribute);
 693
 694                 if (token_count <= 0) /* no tokens */
 695                         continue;
 696
 697                 if (token_count != 3) {
 698                         radlog(L_ERR, "rlm_ldap: Skipping %s line %i: %s", filename, linenumber, buf);
 699                         radlog(L_ERR, "rlm_ldap: Expected 3 tokens "
 700                                "(Item type, RADIUS Attribute and LDAP Attribute) but found only %i", token_count);
 701                         continue;
 702                 }
 703
 704                 /* create new TLDAP_RADIUS list node */
 705                 pair = rad_malloc(sizeof(TLDAP_RADIUS));
 706
 707                 pair->attr = strdup(ldapAttribute);
 708                 pair->radius_attr = strdup(radiusAttribute);
 709
 710                 if ( (pair->attr == NULL) || (pair->radius_attr == NULL) ) {
 711                         radlog(L_ERR, "rlm_ldap: Out of memory");
 712                         if (pair->attr) free(pair->attr);
 713                         if (pair->radius_attr) free(pair->radius_attr);
 714                         free(pair);
 715                         fclose(mapfile);
 716                         return -1;
 717                 }
 718
 719                 /* push node to correct list */
 720                 if (strcasecmp(itemType, "checkItem") == 0) {
 721                         pair->next = inst->check_item_map;
 722                         inst->check_item_map = pair;
 723                 } else if (strcasecmp(itemType, "replyItem") == 0) {
 724                         pair->next = inst->reply_item_map;
 725                         inst->reply_item_map = pair;
 726                 } else {
 727                         radlog(L_ERR, "rlm_ldap: file %s: skipping line %i: unknown itemType %s",
 728                                filename, linenumber, itemType);
 729                         free(pair->attr);
 730                         free(pair->radius_attr);
 731                         free(pair);
 732                         continue;
 733                 }
 734
 735                 DEBUG("rlm_ldap: LDAP %s mapped to RADIUS %s",
 736                       pair->attr, pair->radius_attr);
 737         }
 738
 739         fclose(mapfile);
 740
 741         return 0; /* success */
 742 }
 743
 744 static int
 745 perform_search(void *instance, LDAP_CONN *conn, char *search_basedn, int scope, char *filter,
 746                 char **attrs, LDAPMessage ** result)
 747 {
 748         int             res = RLM_MODULE_OK;
 749         int             ldap_errno = 0;
 750         ldap_instance  *inst = instance;
 751         int             search_retry = 0;
 752
 753         *result = NULL;
 754
 755         if (!conn){
 756                 radlog(L_ERR, "rlm_ldap: NULL connection handle passed");
 757                 return RLM_MODULE_FAIL;
 758         }
 759         if (conn->failed_conns > MAX_FAILED_CONNS_START){
 760                 conn->failed_conns++;
 761                 if (conn->failed_conns >= MAX_FAILED_CONNS_END){
 762                         conn->failed_conns = MAX_FAILED_CONNS_RESTART;
 763                         conn->bound = 0;
 764                 }
 765         }
 766 retry:
 767         if (!conn->bound || conn->ld == NULL) {
 768                 DEBUG2("rlm_ldap: attempting LDAP reconnection");
 769                 if (conn->ld){
 770                         DEBUG2("rlm_ldap: closing existing LDAP connection");
 771                         ldap_unbind_s(conn->ld);
 772                 }
 773                 if ((conn->ld = ldap_connect(instance, inst->login,
 774                                              inst->password, 0, &res, NULL)) == NULL) {
 775                         radlog(L_ERR, "rlm_ldap: (re)connection attempt failed");
 776                         if (search_retry == 0)
 777                                 conn->failed_conns++;
 778                         return (RLM_MODULE_FAIL);
 779                 }
 780                 conn->bound = 1;
 781                 conn->failed_conns = 0;
 782         }
 783         DEBUG2("rlm_ldap: performing search in %s, with filter %s", search_basedn ? search_basedn : "(null)" , filter);
 784         switch (ldap_search_st(conn->ld, search_basedn, scope, filter, attrs, 0, &(inst->timeout), result)) {
 785         case LDAP_SUCCESS:
 786         case LDAP_NO_SUCH_OBJECT:
 787                 break;
 788         case LDAP_SERVER_DOWN:
 789                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: LDAP connection lost.");
 790                 conn->failed_conns++;
 791                 if (search_retry == 0){
 792                         if (conn->failed_conns <= MAX_FAILED_CONNS_START){
 793                                 radlog(L_INFO, "rlm_ldap: Attempting reconnect");
 794                                 search_retry = 1;
 795                                 conn->bound = 0;
 796                                 ldap_msgfree(*result);
 797                                 goto retry;
 798                         }
 799                 }
 800                 ldap_msgfree(*result);
 801                 return RLM_MODULE_FAIL;
 802         case LDAP_INSUFFICIENT_ACCESS:
 803                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: Insufficient access. Check the identity and password configuration directives.");
 804                 ldap_msgfree(*result);
 805                 return RLM_MODULE_FAIL;
 806         case LDAP_TIMEOUT:
 807                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: Timed out while waiting for server to respond. Please increase the timeout.");
 808                 ldap_msgfree(*result);
 809                 return RLM_MODULE_FAIL;
 810         case LDAP_FILTER_ERROR:
 811                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: Bad search filter: %s",filter);
 812                 ldap_msgfree(*result);
 813                 return RLM_MODULE_FAIL;
 814         case LDAP_TIMELIMIT_EXCEEDED:
 815         case LDAP_BUSY:
 816         case LDAP_UNAVAILABLE:
 817                 /* We don't need to reconnect in these cases so we don't set conn->bound */
 818                 ldap_get_option(conn->ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
 819                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: %s", ldap_err2string(ldap_errno));
 820                 ldap_msgfree(*result);
 821                 return (RLM_MODULE_FAIL);
 822         default:
 823                 ldap_get_option(conn->ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
 824                 radlog(L_ERR, "rlm_ldap: ldap_search() failed: %s", ldap_err2string(ldap_errno));
 825                 conn->bound = 0;
 826                 ldap_msgfree(*result);
 827                 return (RLM_MODULE_FAIL);
 828         }
 829
 830         if ((ldap_count_entries(conn->ld, *result)) != 1) {
 831                 DEBUG("rlm_ldap: object not found or got ambiguous search result");
 832                 res = RLM_MODULE_NOTFOUND;
 833                 ldap_msgfree(*result);
 834         }
 835         return res;
 836 }
 837
 838
 839 /*
 840  *      Translate the LDAP queries.
 841  */
 842 static int ldap_escape_func(char *out, int outlen, const char *in)
 843 {
 844         int len = 0;
 845
 846         while (in[0]) {
 847                 /*
 848                  *      Encode unsafe characters.
 849                  */
 850                 if (strchr("*=\\,()", *in)) {
 851                         static const char hex[] = "0123456789abcdef";
 852
 853                         /*
 854                          *      Only 3 or less bytes available.
 855                          */
 856                         if (outlen <= 3) {
 857                                 break;
 858                         }
 859
 860                         *(out++) = '\\';
 861                         *(out++) = hex[((*in) >> 4) & 0x0f];
 862                         *(out++) = hex[(*in) & 0x0f];
 863                         outlen -= 3;
 864                         len += 3;
 865                         in++;
 866                         continue;
 867                 }
 868
 869                 /*
 870                  *      Only one byte left.
 871                  */
 872                 if (outlen <= 1) {
 873                         break;
 874                 }
 875
 876                 /*
 877                  *      Allowed character.
 878                  */
 879                 *(out++) = *(in++);
 880                 outlen--;
 881                 len++;
 882         }
 883         *out = '\0';
 884         return len;
 885 }
 886
 887 /*
 888  * ldap_groupcmp(). Implement the Ldap-Group == "group" filter
 889  */
 890
 891 static int ldap_groupcmp(void *instance, REQUEST *req, VALUE_PAIR *request, VALUE_PAIR *check,
 892                 VALUE_PAIR *check_pairs, VALUE_PAIR **reply_pairs)
 893 {
 894         char            filter[MAX_FILTER_STR_LEN];
 895         char            gr_filter[MAX_FILTER_STR_LEN];
 896         int             res;
 897         LDAPMessage     *result = NULL;
 898         LDAPMessage     *msg = NULL;
 899         char            basedn[MAX_FILTER_STR_LEN];
 900         char            *attrs[] = {"dn",NULL};
 901         char            **vals;
 902         ldap_instance   *inst = instance;
 903         char            *group_attrs[] = {inst->groupmemb_attr,NULL};
 904         LDAP_CONN       *conn;
 905         int             conn_id = -1;
 906         VALUE_PAIR      *vp_user_dn;
 907         VALUE_PAIR      **request_pairs;
 908
 909         request_pairs = &req->packet->vps;
 910
 911         DEBUG("rlm_ldap: Entering ldap_groupcmp()");
 912
 913         if (check->strvalue == NULL || check->length == 0){
 914                 DEBUG("rlm_ldap::ldap_groupcmp: Illegal group name");
 915                 return 1;
 916         }
 917
 918         if (req == NULL){
 919                 DEBUG("rlm_ldap::ldap_groupcmp: NULL request");
 920                 return 1;
 921         }
 922
 923         if (!radius_xlat(basedn, sizeof(basedn), inst->basedn, req, NULL)) {
 924                 DEBUG("rlm_ldap::ldap_groupcmp: unable to create basedn.");
 925                 return 1;
 926         }
 927
 928         while((vp_user_dn = pairfind(*request_pairs, PW_LDAP_USERDN)) == NULL){
 929                 char            *user_dn = NULL;
 930
 931                 if (!radius_xlat(filter, sizeof(filter), inst->filter,
 932                                         req, ldap_escape_func)){
 933                         DEBUG("rlm_ldap::ldap_groupcmp: unable to create filter");
 934                         return 1;
 935                 }
 936                 if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
 937                         radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
 938                         return 1;
 939                 }
 940                 if ((res = perform_search(inst, conn, basedn, LDAP_SCOPE_SUBTREE,
 941                                         filter, attrs, &result)) != RLM_MODULE_OK){
 942                         DEBUG("rlm_ldap::ldap_groupcmp: search failed");
 943                         ldap_release_conn(conn_id,inst->conns);
 944                         return 1;
 945                 }
 946                 if ((msg = ldap_first_entry(conn->ld, result)) == NULL) {
 947                         DEBUG("rlm_ldap::ldap_groupcmp: ldap_first_entry() failed");
 948                         ldap_release_conn(conn_id,inst->conns);
 949                         ldap_msgfree(result);
 950                         return 1;
 951                 }
 952                 if ((user_dn = ldap_get_dn(conn->ld, msg)) == NULL) {
 953                         DEBUG("rlm_ldap:ldap_groupcmp:: ldap_get_dn() failed");
 954                         ldap_release_conn(conn_id,inst->conns);
 955                         ldap_msgfree(result);
 956                         return 1;
 957                 }
 958                 ldap_release_conn(conn_id,inst->conns);
 959                 /*
 960                 * Adding new attribute containing DN for LDAP object associated with
 961                 * given username
 962                 */
 963                 pairadd(request_pairs, pairmake("Ldap-UserDn", user_dn, T_OP_EQ));
 964                 ldap_memfree(user_dn);
 965                 ldap_msgfree(result);
 966         }
 967
 968         if(!radius_xlat(gr_filter, sizeof(gr_filter), inst->groupmemb_filt, req, NULL)){
 969                 DEBUG("rlm_ldap::ldap_groupcmp: unable to create filter.");
 970                 return 1;
 971         }
 972
 973         if (strchr((char *)check->strvalue,',') != NULL) {
 974                 /* This looks like a DN */
 975                 snprintf(filter,sizeof(filter), "%s",gr_filter);
 976                 snprintf(basedn,sizeof(basedn), "%s",(char *)check->strvalue);
 977         } else
 978                 snprintf(filter,sizeof(filter), "(&(%s=%s)%s)",inst->groupname_attr,(char *)check->strvalue,gr_filter);
 979
 980         if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
 981                 radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
 982                 return 1;
 983         }
 984
 985         if ((res = perform_search(inst, conn, basedn, LDAP_SCOPE_SUBTREE,
 986                                 filter, attrs, &result)) == RLM_MODULE_OK){
 987                 DEBUG("rlm_ldap::ldap_groupcmp: User found in group %s",
 988                                 (char *)check->strvalue);
 989                 ldap_msgfree(result);
 990                 ldap_release_conn(conn_id,inst->conns);
 991                 return 0;
 992         }
 993
 994         ldap_release_conn(conn_id,inst->conns);
 995
 996         if (res != RLM_MODULE_NOTFOUND ) {
 997                 DEBUG("rlm_ldap::ldap_groupcmp: Search returned error");
 998                 return 1;
 999         }
1000
1001         if (inst->groupmemb_attr == NULL){
1002                 /* search returned NOTFOUND and searching for membership
1003                  * using user object attributes is not specified in config
1004                  * file
1005                  */
1006                 DEBUG("rlm_ldap::ldap_groupcmp: Group %s not found or user is not a member.",(char *)check->strvalue);
1007                 return 1;
1008         }
1009
1010         snprintf(filter,sizeof(filter), "(objectclass=*)");
1011         if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
1012                 radlog(L_ERR, "rlm_ldap: Add ldap connections are in use");
1013                 return 1;
1014         }
1015         if ((res = perform_search(inst, conn, vp_user_dn->strvalue, LDAP_SCOPE_BASE,
1016                                         filter, group_attrs,&result)) != RLM_MODULE_OK){
1017                 DEBUG("rlm_ldap::ldap_groupcmp: Search returned error");
1018                 ldap_release_conn(conn_id, inst->conns);
1019                 return 1;
1020         }
1021
1022         if ((msg = ldap_first_entry(conn->ld, result)) == NULL) {
1023                 DEBUG("rlm_ldap::ldap_groupcmp: ldap_first_entry() failed");
1024                 ldap_release_conn(conn_id,inst->conns);
1025                 ldap_msgfree(result);
1026                 return 1;
1027         }
1028         if ((vals = ldap_get_values(conn->ld, msg, inst->groupmemb_attr)) != NULL) {
1029                 unsigned int i = 0;
1030                 char found = 0;
1031                 for (;i < ldap_count_values(vals);i++){
1032                         if (strchr(vals[i],',') != NULL){
1033                                 /* This looks like a DN */
1034                                 LDAPMessage *gr_result = NULL;
1035                                 snprintf(filter,sizeof(filter), "(%s=%s)",
1036                                         inst->groupname_attr,
1037                                         (char *)check->strvalue);
1038                                 if ((res = perform_search(inst, conn, vals[i],
1039                                                 LDAP_SCOPE_BASE, filter,
1040                                                 attrs, &gr_result)) != RLM_MODULE_OK){
1041                                         if (res != RLM_MODULE_NOTFOUND){
1042                                                 DEBUG("rlm_ldap::ldap_groupcmp: \
1043                                                         Search returned error");
1044                                                 ldap_value_free(vals);
1045                                                 ldap_msgfree(result);
1046                                                 ldap_release_conn(conn_id,inst->conns);
1047                                                 return 1;
1048                                         }
1049                                 } else {
1050                                         ldap_msgfree(gr_result);
1051                                         found = 1;
1052                                         break;
1053                                 }
1054                         } else {
1055                                 if (strcmp(vals[i],(char *)check->strvalue) == 0){
1056                                         found = 1;
1057                                         break;
1058                                 }
1059                         }
1060                 }
1061                 ldap_value_free(vals);
1062                 ldap_msgfree(result);
1063                 if (found == 0){
1064                         DEBUG("rlm_ldap::groupcmp: Group %s not found \
1065                                 or user not a member",
1066                                 (char *)check->strvalue);
1067                         ldap_release_conn(conn_id,inst->conns);
1068                         return 1;
1069                 }
1070         } else {
1071                         DEBUG("rlm_ldap::ldap_groupcmp: ldap_get_values() failed");
1072                         ldap_msgfree(result);
1073                         ldap_release_conn(conn_id,inst->conns);
1074                         return 1;
1075         }
1076
1077         DEBUG("rlm_ldap::ldap_groupcmp: User found in group %s",(char *)check->strvalue);
1078         ldap_release_conn(conn_id,inst->conns);
1079
1080         return 0;
1081 }
1082
1083 /*
1084  * ldap_xlat()
1085  * Do an xlat on an LDAP URL
1086  */
1087
1088 static int ldap_xlat(void *instance, REQUEST *request, char *fmt, char *out,
1089                      size_t freespace, RADIUS_ESCAPE_STRING func)
1090 {
1091         char url[MAX_FILTER_STR_LEN];
1092         int res;
1093         int ret = 0;
1094         ldap_instance *inst = instance;
1095         LDAPURLDesc *ldap_url;
1096         LDAPMessage *result = NULL;
1097         LDAPMessage *msg = NULL;
1098         char **vals;
1099         int conn_id = -1;
1100         LDAP_CONN *conn;
1101
1102         DEBUG("rlm_ldap: - ldap_xlat");
1103         if (!radius_xlat(url, sizeof(url), fmt, request, func)) {
1104                 radlog (L_ERR, "rlm_ldap: Unable to create LDAP URL.\n");
1105                 return 0;
1106         }
1107         if (!ldap_is_ldap_url(url)){
1108                 radlog (L_ERR, "rlm_ldap: String passed does not look like an LDAP URL.\n");
1109                 return 0;
1110         }
1111         if (ldap_url_parse(url,&ldap_url)){
1112                 radlog (L_ERR, "rlm_ldap: LDAP URL parse failed.\n");
1113                 return 0;
1114         }
1115         if (ldap_url->lud_attrs == NULL || ldap_url->lud_attrs[0] == NULL || \
1116                 ( ldap_url->lud_attrs[1] != NULL || ( ! strlen(ldap_url->lud_attrs[0]) || \
1117                 ! strcmp(ldap_url->lud_attrs[0],"*") ) ) ){
1118                 radlog (L_ERR, "rlm_ldap: Invalid Attribute(s) request.\n");
1119                 ldap_free_urldesc(ldap_url);
1120                 return 0;
1121         }
1122         if (ldap_url->lud_host){
1123                 if (strncmp(inst->server,ldap_url->lud_host,strlen(inst->server)) != 0 || \
1124                                 ldap_url->lud_port != inst->port){
1125                         DEBUG("rlm_ldap: Requested server/port is not known to this module instance.");
1126                         ldap_free_urldesc(ldap_url);
1127                         return 0;
1128                 }
1129         }
1130         if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
1131                 radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
1132                 ldap_free_urldesc(ldap_url);
1133                 return 0;
1134         }
1135         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){
1136                 if (res == RLM_MODULE_NOTFOUND){
1137                         DEBUG("rlm_ldap: Search returned not found");
1138                         ldap_free_urldesc(ldap_url);
1139                         ldap_release_conn(conn_id,inst->conns);
1140                         return 0;
1141                 }
1142                 DEBUG("rlm_ldap: Search returned error");
1143                 ldap_free_urldesc(ldap_url);
1144                 ldap_release_conn(conn_id,inst->conns);
1145                 return 0;
1146         }
1147         if ((msg = ldap_first_entry(conn->ld, result)) == NULL){
1148                 DEBUG("rlm_ldap: ldap_first_entry() failed");
1149                 ldap_msgfree(result);
1150                 ldap_free_urldesc(ldap_url);
1151                 ldap_release_conn(conn_id,inst->conns);
1152                 return 0;
1153         }
1154         if ((vals = ldap_get_values(conn->ld, msg, ldap_url->lud_attrs[0])) != NULL) {
1155                 ret = strlen(vals[0]);
1156                 if (ret > freespace){
1157                         DEBUG("rlm_ldap: Insufficient string space");
1158                         ldap_free_urldesc(ldap_url);
1159                         ldap_value_free(vals);
1160                         ldap_msgfree(result);
1161                         ldap_release_conn(conn_id,inst->conns);
1162                         return 0;
1163                 }
1164                 DEBUG("rlm_ldap: Adding attribute %s, value: %s",ldap_url->lud_attrs[0],vals[0]);
1165                 strncpy(out,vals[0],ret);
1166                 ldap_value_free(vals);
1167         }
1168         else
1169                 ret = 0;
1170
1171         ldap_msgfree(result);
1172         ldap_free_urldesc(ldap_url);
1173         ldap_release_conn(conn_id,inst->conns);
1174
1175         DEBUG("rlm_ldap: - ldap_xlat end");
1176
1177         return ret;
1178 }
1179
1180
1181 /******************************************************************************
1182  *
1183  *      Function: rlm_ldap_authorize
1184  *
1185  *      Purpose: Check if user is authorized for remote access
1186  *
1187  ******************************************************************************/
1188 static int
1189 ldap_authorize(void *instance, REQUEST * request)
1190 {
1191         LDAPMessage     *result = NULL;
1192         LDAPMessage     *msg = NULL;
1193         LDAPMessage     *def_msg = NULL;
1194         LDAPMessage     *def_attr_msg = NULL;
1195         LDAPMessage     *def_result = NULL;
1196         LDAPMessage     *def_attr_result = NULL;
1197         ldap_instance   *inst = instance;
1198         char            *user_dn = NULL;
1199         char            filter[MAX_FILTER_STR_LEN];
1200         char            basedn[MAX_FILTER_STR_LEN];
1201         VALUE_PAIR      *check_tmp;
1202         VALUE_PAIR      *reply_tmp;
1203         int             res;
1204         VALUE_PAIR      **check_pairs, **reply_pairs;
1205         char            **vals;
1206         VALUE_PAIR      *module_fmsg_vp;
1207         VALUE_PAIR      *user_profile;
1208         char            module_fmsg[MAX_STRING_LEN];
1209         LDAP_CONN       *conn;
1210         int             conn_id = -1;
1211
1212         DEBUG("rlm_ldap: - authorize");
1213
1214         if (!request->username){
1215                 radlog(L_AUTH, "rlm_ldap: Attribute \"User-Name\" is required for authentication.\n");
1216                 return RLM_MODULE_INVALID;
1217         }
1218
1219         check_pairs = &request->config_items;
1220         reply_pairs = &request->reply->vps;
1221
1222         /*
1223          * Check for valid input, zero length names not permitted
1224          */
1225         if (request->username->strvalue == 0) {
1226                 radlog(L_ERR, "rlm_ldap: zero length username not permitted\n");
1227                 return RLM_MODULE_INVALID;
1228         }
1229         DEBUG("rlm_ldap: performing user authorization for %s",
1230                request->username->strvalue);
1231
1232         if (!radius_xlat(filter, sizeof(filter), inst->filter,
1233                          request, ldap_escape_func)) {
1234                 radlog (L_ERR, "rlm_ldap: unable to create filter.\n");
1235                 return RLM_MODULE_INVALID;
1236         }
1237
1238         if (!radius_xlat(basedn, sizeof(basedn), inst->basedn,
1239                          request, NULL)) {
1240                 radlog (L_ERR, "rlm_ldap: unable to create basedn.\n");
1241                 return RLM_MODULE_INVALID;
1242         }
1243
1244         if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
1245                 radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
1246                 return RLM_MODULE_FAIL;
1247         }
1248         if ((res = perform_search(instance, conn, basedn, LDAP_SCOPE_SUBTREE, filter, inst->atts, &result)) != RLM_MODULE_OK) {
1249                 DEBUG("rlm_ldap: search failed");
1250                 if (res == RLM_MODULE_NOTFOUND){
1251                         snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: User not found");
1252                         module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1253                         pairadd(&request->packet->vps, module_fmsg_vp);
1254                 }
1255                 ldap_release_conn(conn_id,inst->conns);
1256                 return (res);
1257         }
1258         if ((msg = ldap_first_entry(conn->ld, result)) == NULL) {
1259                 DEBUG("rlm_ldap: ldap_first_entry() failed");
1260                 ldap_msgfree(result);
1261                 ldap_release_conn(conn_id,inst->conns);
1262                 return RLM_MODULE_FAIL;
1263         }
1264         if ((user_dn = ldap_get_dn(conn->ld, msg)) == NULL) {
1265                 DEBUG("rlm_ldap: ldap_get_dn() failed");
1266                 ldap_msgfree(result);
1267                 ldap_release_conn(conn_id,inst->conns);
1268                 return RLM_MODULE_FAIL;
1269         }
1270         /*
1271          * Adding new attribute containing DN for LDAP object associated with
1272          * given username
1273          */
1274         pairadd(&request->packet->vps, pairmake("Ldap-UserDn", user_dn, T_OP_EQ));
1275         ldap_memfree(user_dn);
1276
1277
1278         /* Remote access is controled by attribute of the user object */
1279         if (inst->access_attr) {
1280                 if ((vals = ldap_get_values(conn->ld, msg, inst->access_attr)) != NULL) {
1281                         if (inst->default_allow){
1282                                 DEBUG("rlm_ldap: checking if remote access for %s is allowed by %s", request->username->strvalue, inst->access_attr);
1283                                 if (!strncmp(vals[0], "FALSE", 5)) {
1284                                         DEBUG("rlm_ldap: dialup access disabled");
1285                                         snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Access Attribute denies access");
1286                                         module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1287                                         pairadd(&request->packet->vps, module_fmsg_vp);
1288                                         ldap_msgfree(result);
1289                                         ldap_value_free(vals);
1290                                         ldap_release_conn(conn_id,inst->conns);
1291                                         return RLM_MODULE_USERLOCK;
1292                                 }
1293                                 ldap_value_free(vals);
1294                         }
1295                         else{
1296                                 DEBUG("rlm_ldap: %s attribute exists - access denied by default", inst->access_attr);
1297                                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Access Attribute denies access");
1298                                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1299                                 pairadd(&request->packet->vps, module_fmsg_vp);
1300                                 ldap_msgfree(result);
1301                                 ldap_value_free(vals);
1302                                 ldap_release_conn(conn_id,inst->conns);
1303                                 return RLM_MODULE_USERLOCK;
1304                         }
1305                 } else {
1306                         if (inst->default_allow){
1307                                 DEBUG("rlm_ldap: no %s attribute - access denied by default", inst->access_attr);
1308                                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Access Attribute denies access");
1309                                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1310                                 pairadd(&request->packet->vps, module_fmsg_vp);
1311                                 ldap_msgfree(result);
1312                                 ldap_release_conn(conn_id,inst->conns);
1313                                 return RLM_MODULE_USERLOCK;
1314                         }
1315                 }
1316         }
1317
1318         /*
1319          * Check for the default profile entry. If it exists then add the
1320          * attributes it contains in the check and reply pairs
1321          */
1322
1323         user_profile = pairfind(request->config_items, PW_USER_PROFILE);
1324         if (inst->default_profile || user_profile){
1325                 char *profile = inst->default_profile;
1326
1327                 strNcpy(filter,inst->base_filter,sizeof(filter));
1328                 if (user_profile)
1329                         profile = user_profile->strvalue;
1330                 if (profile && strlen(profile)){
1331                         if ((res = perform_search(instance, conn,
1332                                 profile, LDAP_SCOPE_BASE,
1333                                 filter, inst->atts, &def_result)) == RLM_MODULE_OK){
1334                                 if ((def_msg = ldap_first_entry(conn->ld,def_result))){
1335                                         if ((check_tmp = ldap_pairget(conn->ld,def_msg,inst->check_item_map,check_pairs,1))) {
1336                                                 if (inst->do_xlat){
1337                                                         pairxlatmove(request, check_pairs, &check_tmp);
1338                                                         pairfree(&check_tmp);
1339                                                 }
1340                                                 else
1341                                                         pairadd(check_pairs,check_tmp);
1342                                         }
1343                                         if ((reply_tmp = ldap_pairget(conn->ld,def_msg,inst->reply_item_map,reply_pairs,0))) {
1344                                                 if (inst->do_xlat){
1345                                                         pairxlatmove(request, reply_pairs, &reply_tmp);
1346                                                         pairfree(&reply_tmp);
1347                                                 }
1348                                                 else
1349                                                         pairadd(reply_pairs,reply_tmp);
1350                                         }
1351                                 }
1352                                 ldap_msgfree(def_result);
1353                         } else
1354                                 DEBUG("rlm_ldap: default_profile/user-profile search failed");
1355                 }
1356         }
1357
1358         /*
1359          * Check for the profile attribute. If it exists, we assume that it
1360          * contains the DN of an entry containg a profile for the user. That
1361          * way we can have different general profiles for various user groups
1362          * (students,faculty,staff etc)
1363          */
1364
1365         if (inst->profile_attr){
1366                 if ((vals = ldap_get_values(conn->ld, msg, inst->profile_attr)) != NULL) {
1367                         unsigned int i=0;
1368                         strNcpy(filter,inst->base_filter,sizeof(filter));
1369                         while(vals[i] != NULL && strlen(vals[i])){
1370                                 if ((res = perform_search(instance, conn,
1371                                         vals[i], LDAP_SCOPE_BASE,
1372                                         filter, inst->atts, &def_attr_result)) == RLM_MODULE_OK){
1373                                         if ((def_attr_msg = ldap_first_entry(conn->ld,def_attr_result))){
1374                                                 if ((check_tmp = ldap_pairget(conn->ld,def_attr_msg,inst->check_item_map,check_pairs,1))) {
1375                                                         if (inst->do_xlat){
1376                                                                 pairxlatmove(request, check_pairs, &check_tmp);
1377                                                                 pairfree(&check_tmp);
1378                                                         }
1379                                                         else
1380                                                                 pairadd(check_pairs,check_tmp);
1381                                                 }
1382                                                 if ((reply_tmp = ldap_pairget(conn->ld,def_attr_msg,inst->reply_item_map,reply_pairs,0))) {
1383                                                         if (inst->do_xlat){
1384                                                                 pairxlatmove(request, reply_pairs, &reply_tmp);
1385                                                                 pairfree(&reply_tmp);
1386                                                         }
1387                                                         else
1388                                                                 pairadd(reply_pairs,reply_tmp);
1389                                                 }
1390                                         }
1391                                         ldap_msgfree(def_attr_result);
1392                                 } else
1393                                         DEBUG("rlm_ldap: profile_attribute search failed");
1394                                 i++;
1395                         }
1396                         ldap_value_free(vals);
1397                 }
1398         }
1399         if (inst->passwd_attr && strlen(inst->passwd_attr)){
1400 #ifdef NOVELL_UNIVERSAL_PASSWORD
1401                 if(strcasecmp(inst->passwd_attr,"nspmPassword")!= 0){
1402 #endif
1403                 VALUE_PAIR *passwd_item;
1404
1405                 if ((passwd_item = pairfind(request->config_items, PW_PASSWORD)) == NULL){
1406                         char **passwd_vals;
1407                         char *passwd_val = NULL;
1408                         int passwd_len;
1409
1410                         if ((passwd_vals = ldap_get_values(conn->ld,msg,inst->passwd_attr)) != NULL){
1411                                 unsigned int i=0;
1412                                 while(passwd_vals[i] != NULL){
1413                                         if (strlen(passwd_vals[i])){
1414                                                 passwd_val = passwd_vals[i];
1415
1416                                                 if (inst->passwd_hdr && strlen(inst->passwd_hdr)){
1417                                                         passwd_val = strstr(passwd_val,inst->passwd_hdr);
1418                                                         if (passwd_val != NULL)
1419                                                                 passwd_val += strlen(inst->passwd_hdr);
1420                                                         else
1421                                                                 DEBUG("rlm_ldap: Password header not found in password %s for user %s", passwd_vals[0],request->username->strvalue);
1422                                                 }
1423                                                 if (passwd_val){
1424                                                         if ((passwd_item = paircreate(PW_PASSWORD,PW_TYPE_STRING)) == NULL){
1425                                                                 radlog(L_ERR|L_CONS, "no memory");
1426                                                                 ldap_value_free(passwd_vals);
1427                                                                 ldap_msgfree(result);
1428                                                                 ldap_release_conn(conn_id,inst->conns);
1429                                                                 return RLM_MODULE_FAIL;
1430                                                         }
1431                                                         passwd_len = strlen(passwd_val);
1432                                                         strncpy(passwd_item->strvalue,passwd_val,MAX_STRING_LEN - 1);
1433                                                         passwd_item->length = (passwd_len > (MAX_STRING_LEN - 1)) ? (MAX_STRING_LEN - 1) : passwd_len;
1434                                                         pairadd(&request->config_items,passwd_item);
1435                                                         DEBUG("rlm_ldap: Added password %s in check items",passwd_item->strvalue);
1436                                                 }
1437                                         }
1438                                         i++;
1439                                 }
1440                                 ldap_value_free(passwd_vals);
1441                         }
1442                 }
1443 #ifdef NOVELL_UNIVERSAL_PASSWORD
1444                 }
1445                 else{
1446                 /*
1447                 * Read Universal Password from eDirectory
1448                 */
1449                         VALUE_PAIR      *passwd_item;
1450                         VALUE_PAIR      *vp_user_dn;
1451                         int             passwd_len;
1452                         char            *universal_password = NULL;
1453                         int             universal_password_len = UNIVERSAL_PASS_LEN;
1454                         char            *passwd_val = NULL;
1455
1456                         res = 0;
1457
1458                         if ((passwd_item = pairfind(request->config_items, PW_PASSWORD)) == NULL){
1459
1460                                 universal_password = rad_malloc(universal_password_len);
1461                                 memset(universal_password, 0, universal_password_len);
1462
1463                                 vp_user_dn = pairfind(request->packet->vps,PW_LDAP_USERDN);
1464                                 res = nmasldap_get_password(conn->ld,vp_user_dn->strvalue,&universal_password_len,universal_password);
1465
1466                                 if (res == 0){
1467                                         passwd_val = universal_password;
1468
1469                                         if (inst->passwd_hdr && strlen(inst->passwd_hdr)){
1470                                                 passwd_val = strstr(passwd_val,inst->passwd_hdr);
1471
1472                                                 if (passwd_val != NULL)
1473                                                         passwd_val += strlen((char*)inst->passwd_hdr);
1474                                                 else
1475                                                         DEBUG("rlm_ldap: Password header not found in password %s for user %s ",passwd_val,request->username->strvalue);
1476                                         }
1477
1478                                         if (passwd_val){
1479                                                 if ((passwd_item = paircreate(PW_PASSWORD,PW_TYPE_STRING)) == NULL){
1480                                                         radlog(L_ERR, "rlm_ldap: Could not allocate memory. Aborting.");
1481                                                         ldap_msgfree(result);
1482                                                         ldap_release_conn(conn_id,inst->conns);
1483                                                         memset(universal_password, 0, universal_password_len);
1484                                                         free(universal_password);
1485                                                         return RLM_MODULE_FAIL;
1486                                                 }
1487
1488                                                 passwd_len = strlen(passwd_val);
1489                                                 strncpy(passwd_item->strvalue,passwd_val,MAX_STRING_LEN - 1);
1490                                                 passwd_item->length = (passwd_len > (MAX_STRING_LEN - 1)) ? (MAX_STRING_LEN - 1) : passwd_len;
1491                                                 pairadd(&request->config_items,passwd_item);
1492
1493 #ifdef NOVELL
1494                                                 {
1495                                                         DICT_ATTR *dattr;
1496                                                         VALUE_PAIR      *vp_inst, *vp_apc;
1497                                                         int inst_attr, apc_attr;
1498
1499                                                         dattr = dict_attrbyname("LDAP-Instance");
1500                                                         inst_attr = dattr->attr;
1501                                                         dattr = dict_attrbyname("eDir-APC");
1502                                                         apc_attr = dattr->attr;
1503
1504                                                         vp_inst = pairfind(request->config_items, inst_attr);
1505                                                         if(vp_inst == NULL){
1506                                                                 /*
1507                                                                  * The authorize method of no other LDAP module instance has
1508                                                                  * processed this request.
1509                                                                  */
1510                                                                 if ((vp_inst = paircreate(inst_attr, PW_TYPE_STRING)) == NULL){
1511                                                                         radlog(L_ERR, "rlm_ldap: Could not allocate memory. Aborting.");
1512                                                                         ldap_msgfree(result);
1513                                                                         ldap_release_conn(conn_id, inst->conns);
1514                                                                         memset(universal_password, 0, universal_password_len);
1515                                                                         free(universal_password);
1516                                                                         return RLM_MODULE_FAIL;
1517                                                                 }
1518                                                                 strcpy(vp_inst->strvalue, inst->xlat_name);
1519                                                                 vp_inst->length = strlen(vp_inst->strvalue);
1520                                                                 pairadd(&request->config_items, vp_inst);
1521
1522                                                                 /*
1523                                                                  * Inform the authenticate / post-auth method about the presence
1524                                                                  * of UP in the config items list and whether eDirectory account
1525                                                                  * policy check is to be performed or not.
1526                                                                  */
1527                                                                 if ((vp_apc = paircreate(apc_attr, PW_TYPE_INTEGER)) == NULL){
1528                                                                         radlog(L_ERR, "rlm_ldap: Could not allocate memory. Aborting.");
1529                                                                         ldap_msgfree(result);
1530                                                                         ldap_release_conn(conn_id, inst->conns);
1531                                                                         memset(universal_password, 0, universal_password_len);
1532                                                                         free(universal_password);
1533                                                                         return RLM_MODULE_FAIL;
1534                                                                 }
1535
1536                                                                 if(!inst->edir_account_policy_check){
1537                                                                         /* Do nothing */
1538                                                                         strcpy(vp_apc->strvalue, "1");
1539                                                                 }else{
1540                                                                         /* Perform eDirectory account-policy check */
1541                                                                         strcpy(vp_apc->strvalue, "2");
1542                                                                 }
1543                                                                 vp_apc->length = 1;
1544                                                                 pairadd(&request->config_items, vp_apc);
1545                                                         }
1546                                                 }
1547 #endif
1548
1549                                                 DEBUG("rlm_ldap: Added the eDirectory password in check items");
1550                                         }
1551                                 }
1552                                 else {
1553                                         DEBUG("rlm_ldap: Error reading Universal Password.Return Code = %d",res);
1554                                 }
1555
1556                                 memset(universal_password, 0, universal_password_len);
1557                                 free(universal_password);
1558                         }
1559                 }
1560 #endif
1561
1562         }
1563
1564
1565
1566         DEBUG("rlm_ldap: looking for check items in directory...");
1567
1568         if ((check_tmp = ldap_pairget(conn->ld, msg, inst->check_item_map,check_pairs,1)) != NULL) {
1569                 if (inst->do_xlat){
1570                         pairxlatmove(request, check_pairs, &check_tmp);
1571                         pairfree(&check_tmp);
1572                 }
1573                 else
1574                         pairadd(check_pairs,check_tmp);
1575         }
1576
1577
1578         DEBUG("rlm_ldap: looking for reply items in directory...");
1579
1580
1581         if ((reply_tmp = ldap_pairget(conn->ld, msg, inst->reply_item_map,reply_pairs,0)) != NULL) {
1582                 if (inst->do_xlat){
1583                         pairxlatmove(request, reply_pairs, &reply_tmp);
1584                         pairfree(&reply_tmp);
1585                 }
1586                 else
1587                         pairadd(reply_pairs,reply_tmp);
1588         }
1589
1590        if (inst->do_comp && paircmp(request,request->packet->vps,*check_pairs,reply_pairs) != 0){
1591 #ifdef NOVELL
1592                 /* Don't perform eDirectory APC if RADIUS authorize fails */
1593                 int apc_attr;
1594                 VALUE_PAIR *vp_apc;
1595                 DICT_ATTR *dattr;
1596
1597                 dattr = dict_attrbyname("eDir-APC");
1598                 apc_attr = dattr->attr;
1599
1600                 vp_apc = pairfind(request->config_items, apc_attr);
1601                 if(vp_apc)
1602                         vp_apc->strvalue[0] = '1';
1603 #endif
1604
1605                 DEBUG("rlm_ldap: Pairs do not match. Rejecting user.");
1606                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Pairs do not match");
1607                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1608                 pairadd(&request->packet->vps, module_fmsg_vp);
1609                 ldap_msgfree(result);
1610                 ldap_release_conn(conn_id,inst->conns);
1611
1612                 return RLM_MODULE_REJECT;
1613         }
1614
1615         /*
1616          * Module should default to LDAP authentication if no Auth-Type
1617          * specified.  Note that we do this ONLY if configured, AND we
1618          * set the Auth-Type to our module name, which allows multiple
1619          * ldap instances to work.
1620          */
1621         if (inst->set_auth_type &&
1622             (pairfind(*check_pairs, PW_AUTH_TYPE) == NULL) &&
1623             request->password &&
1624             (request->password->attribute == PW_USER_PASSWORD))
1625                 pairadd(check_pairs, pairmake("Auth-Type", inst->xlat_name, T_OP_EQ));
1626
1627         DEBUG("rlm_ldap: user %s authorized to use remote access",
1628               request->username->strvalue);
1629         ldap_msgfree(result);
1630         ldap_release_conn(conn_id,inst->conns);
1631
1632         return RLM_MODULE_OK;
1633 }
1634
1635 /*****************************************************************************
1636  *
1637  *      Function: rlm_ldap_authenticate
1638  *
1639  *      Purpose: Check the user's password against ldap database
1640  *
1641  *****************************************************************************/
1642 static int
1643 ldap_authenticate(void *instance, REQUEST * request)
1644 {
1645         LDAP           *ld_user;
1646         LDAPMessage    *result, *msg;
1647         ldap_instance  *inst = instance;
1648         char           *user_dn, *attrs[] = {"uid", NULL};
1649         char            filter[MAX_FILTER_STR_LEN];
1650         char            basedn[MAX_FILTER_STR_LEN];
1651         int             res;
1652         VALUE_PAIR     *vp_user_dn;
1653         VALUE_PAIR      *module_fmsg_vp;
1654         char            module_fmsg[MAX_STRING_LEN];
1655         LDAP_CONN       *conn;
1656         int             conn_id = -1;
1657 #ifdef NOVELL
1658         char            *err = NULL;
1659 #endif
1660
1661         DEBUG("rlm_ldap: - authenticate");
1662
1663         /*
1664          * Ensure that we're being passed a plain-text password, and not
1665          * anything else.
1666          */
1667
1668         if (!request->username) {
1669                 radlog(L_AUTH, "rlm_ldap: Attribute \"User-Name\" is required for authentication.\n");
1670                 return RLM_MODULE_INVALID;
1671         }
1672
1673         if (!request->password){
1674                 radlog(L_AUTH, "rlm_ldap: Attribute \"User-Password\" is required for authentication.");
1675                 return RLM_MODULE_INVALID;
1676         }
1677
1678         if(request->password->attribute != PW_PASSWORD) {
1679                 radlog(L_AUTH, "rlm_ldap: Attribute \"User-Password\" is required for authentication. Cannot use \"%s\".", request->password->name);
1680                 return RLM_MODULE_INVALID;
1681         }
1682
1683         if (request->password->length == 0) {
1684                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: empty password supplied");
1685                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1686                 pairadd(&request->packet->vps, module_fmsg_vp);
1687                 return RLM_MODULE_INVALID;
1688         }
1689
1690         /*
1691          * Check that we don't have any failed connections. If we do there's no real need
1692          * of runing. Also give it another chance if we have a lot of failed connections.
1693          */
1694         if (inst->failed_conns > MAX_FAILED_CONNS_END)
1695                 inst->failed_conns = 0;
1696         if (inst->failed_conns > MAX_FAILED_CONNS_START){
1697                 inst->failed_conns++;
1698                 return RLM_MODULE_FAIL;
1699         }
1700
1701
1702         DEBUG("rlm_ldap: login attempt by \"%s\" with password \"%s\"",
1703                request->username->strvalue, request->password->strvalue);
1704
1705         while((vp_user_dn = pairfind(request->packet->vps, PW_LDAP_USERDN)) == NULL) {
1706                 if (!radius_xlat(filter, sizeof(filter), inst->filter,
1707                                 request, NULL)) {
1708                         radlog (L_ERR, "rlm_ldap: unable to create filter.\n");
1709                         return RLM_MODULE_INVALID;
1710                 }
1711
1712                 if (!radius_xlat(basedn, sizeof(basedn), inst->basedn,
1713                                 request, NULL)) {
1714                         radlog (L_ERR, "rlm_ldap: unable to create basedn.\n");
1715                         return RLM_MODULE_INVALID;
1716                 }
1717
1718                 if ((conn_id = ldap_get_conn(inst->conns,&conn,inst)) == -1){
1719                         radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
1720                         return RLM_MODULE_FAIL;
1721                 }
1722                 if ((res = perform_search(instance, conn, basedn, LDAP_SCOPE_SUBTREE, filter, attrs, &result)) != RLM_MODULE_OK) {
1723                         if (res == RLM_MODULE_NOTFOUND){
1724                                 snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: User not found");
1725                                 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1726                                 pairadd(&request->packet->vps, module_fmsg_vp);
1727                         }
1728                         ldap_release_conn(conn_id,inst->conns);
1729                         return (res);
1730                 }
1731                 if ((msg = ldap_first_entry(conn->ld, result)) == NULL) {
1732                         ldap_msgfree(result);
1733                         ldap_release_conn(conn_id,inst->conns);
1734                         return RLM_MODULE_FAIL;
1735                 }
1736                 if ((user_dn = ldap_get_dn(conn->ld, msg)) == NULL) {
1737                         DEBUG("rlm_ldap: ldap_get_dn() failed");
1738                         ldap_msgfree(result);
1739                         ldap_release_conn(conn_id,inst->conns);
1740                         return RLM_MODULE_FAIL;
1741                 }
1742                 ldap_release_conn(conn_id,inst->conns);
1743                 pairadd(&request->packet->vps, pairmake("Ldap-UserDn", user_dn, T_OP_EQ));
1744                 ldap_memfree(user_dn);
1745                 ldap_msgfree(result);
1746         }
1747
1748         user_dn = vp_user_dn->strvalue;
1749
1750         DEBUG("rlm_ldap: user DN: %s", user_dn);
1751
1752 #ifndef NOVELL
1753         ld_user = ldap_connect(instance, user_dn, request->password->strvalue,
1754                                1, &res, NULL);
1755 #else
1756
1757         ld_user = ldap_connect(instance, user_dn, request->password->strvalue,
1758                         1, &res, &err);
1759
1760         if(err != NULL){
1761                 /* 'err' contains the LDAP connection error description */
1762                 DEBUG("rlm_ldap: %s", err);
1763                 pairadd(&request->reply->vps, pairmake("Reply-Message", err, T_OP_EQ));
1764                 ldap_memfree((void *)err);
1765         }
1766
1767         /* Don't perform eDirectory APC again after attempting to bind here. */
1768         {
1769                 int apc_attr;
1770                 DICT_ATTR *dattr;
1771                 VALUE_PAIR *vp_apc;
1772
1773                 dattr = dict_attrbyname("eDir-APC");
1774                 apc_attr = dattr->attr;
1775                 vp_apc = pairfind(request->config_items, apc_attr);
1776                 if(vp_apc && vp_apc->strvalue[0] == '2')
1777                         vp_apc->strvalue[0] = '3';
1778         }
1779 #endif
1780
1781         if (ld_user == NULL){
1782                 if (res == RLM_MODULE_REJECT){
1783                         inst->failed_conns = 0;
1784                         snprintf(module_fmsg,sizeof(module_fmsg),"rlm_ldap: Bind as user failed");
1785                         module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
1786                         pairadd(&request->packet->vps, module_fmsg_vp);
1787                 }
1788                 if (res == RLM_MODULE_FAIL){
1789                         DEBUG("rlm_ldap: ldap_connect() failed");
1790                         inst->failed_conns++;
1791                 }
1792                 return (res);
1793         }
1794
1795         DEBUG("rlm_ldap: user %s authenticated succesfully",
1796               request->username->strvalue);
1797         ldap_unbind_s(ld_user);
1798         inst->failed_conns = 0;
1799
1800         return RLM_MODULE_OK;
1801 }
1802
1803 #ifdef NOVELL
1804 /*****************************************************************************
1805  *
1806  *      Function: rlm_ldap_postauth
1807  *
1808  *      Purpose: Perform eDirectory account policy check and failed-login reporting
1809  *      to eDirectory.
1810  *
1811  *****************************************************************************/
1812 static int
1813 ldap_postauth(void *instance, REQUEST * request)
1814 {
1815         int res = RLM_MODULE_FAIL;
1816         int inst_attr, apc_attr;
1817         char password[UNIVERSAL_PASS_LEN];
1818         ldap_instance  *inst = instance;
1819         LDAP_CONN       *conn;
1820         VALUE_PAIR *vp_inst, *vp_apc;
1821         DICT_ATTR *dattr;
1822
1823         dattr = dict_attrbyname("LDAP-Instance");
1824         inst_attr = dattr->attr;
1825         dattr = dict_attrbyname("eDir-APC");
1826         apc_attr = dattr->attr;
1827
1828         vp_inst = pairfind(request->config_items, inst_attr);
1829
1830         /*
1831          * Check if the password in the config items list is the user's UP which has
1832          * been read in the authorize method of this instance of the LDAP module.
1833          */
1834         if((vp_inst == NULL) || strcmp(vp_inst->strvalue, inst->xlat_name))
1835                 return RLM_MODULE_NOOP;
1836
1837         vp_apc = pairfind(request->config_items, apc_attr);
1838
1839         switch(vp_apc->strvalue[0]){
1840                 case '1':
1841                         /* Account policy check not enabled */
1842                 case '3':
1843                         /* Account policy check has been completed */
1844                         res = RLM_MODULE_NOOP;
1845                         break;
1846                 case '2':
1847                         {
1848                                 int err, conn_id = -1;
1849                                 char *error_msg = NULL;
1850                                 VALUE_PAIR *vp_fdn, *vp_pwd;
1851                                 DICT_ATTR *da;
1852
1853                                 if(request->reply->code == PW_AUTHENTICATION_REJECT){
1854                                         /* Bind to eDirectory as the RADIUS user with a wrong password. */
1855                                         vp_pwd = pairfind(request->config_items, PW_PASSWORD);
1856                                         strcpy(password, vp_pwd->strvalue);
1857                                         if(strlen(password) > 0){
1858                                                 if(password[0] != 'a'){
1859                                                         password[0] = 'a';
1860                                                 }else{
1861                                                         password[0] = 'b';
1862                                                 }
1863                                         }else{
1864                                                 strcpy(password, "dummy_password");
1865                                         }
1866                                         res = RLM_MODULE_REJECT;
1867                                 }else{
1868                                         /* Bind to eDirectory as the RADIUS user using the user's UP */
1869                                         vp_pwd = pairfind(request->config_items, PW_PASSWORD);
1870                                         if(vp_pwd == NULL){
1871                                                 DEBUG("rlm_ldap: User's Universal Password not in config items list.");
1872                                                 return RLM_MODULE_FAIL;
1873                                         }
1874                                         strcpy(password, vp_pwd->strvalue);
1875                                 }
1876
1877                                 if ((da = dict_attrbyname("Ldap-UserDn")) == NULL) {
1878                                         DEBUG("rlm_ldap: Attribute for user FDN not found in dictionary. Unable to proceed");
1879                                         return RLM_MODULE_FAIL;
1880                                 }
1881
1882                                 vp_fdn = pairfind(request->packet->vps, da->attr);
1883                                 if(vp_fdn == NULL){
1884                                         DEBUG("rlm_ldap: User's FQDN not in config items list.");
1885                                         return RLM_MODULE_FAIL;
1886                                 }
1887
1888                                 if ((conn_id = ldap_get_conn(inst->apc_conns, &conn, inst)) == -1){
1889                                         radlog(L_ERR, "rlm_ldap: All ldap connections are in use");
1890                                         return RLM_MODULE_FAIL;
1891                                 }
1892
1893                                 /*
1894                                  * If there is an existing LDAP connection to the directory, bind over
1895                                  * it. Otherwise, establish a new connection.
1896                                  */
1897 postauth_reconnect:
1898                                 if (!conn->bound || conn->ld == NULL) {
1899                                         DEBUG2("rlm_ldap: attempting LDAP reconnection");
1900                                         if (conn->ld){
1901                                                 DEBUG2("rlm_ldap: closing existing LDAP connection");
1902                                                 ldap_unbind_s(conn->ld);
1903                                         }
1904                                         if ((conn->ld = ldap_connect(instance, (char *)vp_fdn->strvalue, password, 0, &res, &error_msg)) == NULL) {
1905                                                 radlog(L_ERR, "rlm_ldap: eDirectory account policy check failed.");
1906
1907                                                 if(error_msg != NULL){
1908                                                         DEBUG("rlm_ldap: %s", error_msg);
1909                                                         pairadd(&request->reply->vps, pairmake("Reply-Message", error_msg, T_OP_EQ));
1910                                                         ldap_memfree((void *)error_msg);
1911                                                 }
1912
1913                                                 vp_apc->strvalue[0] = '3';
1914                                                 ldap_release_conn(conn_id, inst->apc_conns);
1915                                                 return RLM_MODULE_REJECT;
1916                                         }
1917                                         conn->bound = 1;
1918                                 }else if((err = ldap_simple_bind_s(conn->ld, (char *)vp_fdn->strvalue, password)) != LDAP_SUCCESS){
1919                                         if(err == LDAP_SERVER_DOWN){
1920                                                 conn->bound = 0;
1921                                                 goto postauth_reconnect;
1922                                         }
1923                                         DEBUG("rlm_ldap: eDirectory account policy check failed.");
1924                                         ldap_get_option(conn->ld, LDAP_OPT_ERROR_STRING, &error_msg);
1925                                         if(error_msg != NULL){
1926                                                 DEBUG("rlm_ldap: %s", error_msg);
1927                                                 pairadd(&request->reply->vps, pairmake("Reply-Message", error_msg, T_OP_EQ));
1928                                                 ldap_memfree((void *)error_msg);
1929                                         }
1930                                         vp_apc->strvalue[0] = '3';
1931                                         ldap_release_conn(conn_id, inst->apc_conns);
1932                                         return RLM_MODULE_REJECT;
1933                                 }
1934                                 vp_apc->strvalue[0] = '3';
1935                                 ldap_release_conn(conn_id, inst->apc_conns);
1936                                 return RLM_MODULE_OK;
1937                         }
1938         }
1939         return res;
1940 }
1941 #endif
1942
1943 static LDAP    *
1944 ldap_connect(void *instance, const char *dn, const char *password, int auth, int *result, char **err)
1945 {
1946         ldap_instance  *inst = instance;
1947         LDAP           *ld = NULL;
1948         int             msgid, rc, ldap_version;
1949         int             ldap_errno = 0;
1950         LDAPMessage    *res;
1951
1952         if (inst->is_url){
1953 #ifdef HAVE_LDAP_INITIALIZE
1954                 DEBUG("rlm_ldap: (re)connect to %s, authentication %d", inst->server, auth);
1955                 if (ldap_initialize(&ld, inst->server) != LDAP_SUCCESS) {
1956                         radlog(L_ERR, "rlm_ldap: ldap_initialize() failed");
1957                         *result = RLM_MODULE_FAIL;
1958                         return (NULL);
1959                 }
1960 #endif
1961         }
1962         else{
1963                 DEBUG("rlm_ldap: (re)connect to %s:%d, authentication %d", inst->server, inst->port, auth);
1964                 if ((ld = ldap_init(inst->server, inst->port)) == NULL) {
1965                         radlog(L_ERR, "rlm_ldap: ldap_init() failed");
1966                         *result = RLM_MODULE_FAIL;
1967                         return (NULL);
1968                 }
1969         }
1970         if (ldap_set_option(ld, LDAP_OPT_NETWORK_TIMEOUT, (void *) &(inst->net_timeout)) != LDAP_OPT_SUCCESS) {
1971                 radlog(L_ERR, "rlm_ldap: Could not set LDAP_OPT_NETWORK_TIMEOUT %ld.%ld", inst->net_timeout.tv_sec, inst->net_timeout.tv_usec);
1972         }
1973         if (ldap_set_option(ld, LDAP_OPT_TIMELIMIT, (void *) &(inst->timelimit)) != LDAP_OPT_SUCCESS) {
1974                 radlog(L_ERR, "rlm_ldap: Could not set LDAP_OPT_TIMELIMIT %d", inst->timelimit);
1975         }
1976         if (inst->ldap_debug && ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, &(inst->ldap_debug)) != LDAP_OPT_SUCCESS) {
1977                 radlog(L_ERR, "rlm_ldap: Could not set LDAP_OPT_DEBUG_LEVEL %d", inst->ldap_debug);
1978         }
1979         ldap_version = LDAP_VERSION3;
1980         if (ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &ldap_version) != LDAP_OPT_SUCCESS) {
1981                 radlog(L_ERR, "rlm_ldap: Could not set LDAP version to V3");
1982         }
1983 #ifdef HAVE_LDAP_START_TLS
1984         if(inst->tls_mode) {
1985                 DEBUG("rlm_ldap: setting TLS mode to %d", inst->tls_mode);
1986                 if(ldap_set_option(ld, LDAP_OPT_X_TLS,
1987                            (void *) &(inst->tls_mode)) != LDAP_OPT_SUCCESS) {
1988                         ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
1989                         radlog(L_ERR, "rlm_ldap: could not set LDAP_OPT_X_TLS option %s", ldap_err2string(ldap_errno));
1990                 }
1991         }
1992
1993         if(inst->tls_cacertfile != NULL) {
1994                 DEBUG("rlm_ldap: setting TLS CACert File to %s", inst->tls_cacertfile);
1995
1996                 if ( ldap_set_option( NULL, LDAP_OPT_X_TLS_CACERTFILE,
1997                                                           (void *) inst->tls_cacertfile )
1998                          != LDAP_OPT_SUCCESS) {
1999                         radlog(L_ERR, "rlm_ldap: could not set "
2000                                    "LDAP_OPT_X_TLS_CACERTFILE option to %s", inst->tls_cacertfile);
2001                 }
2002         }
2003
2004         if(inst->tls_cacertdir != NULL) {
2005                 DEBUG("rlm_ldap: setting TLS CACert Directory to %s", inst->tls_cacertdir);
2006
2007                 if ( ldap_set_option( NULL, LDAP_OPT_X_TLS_CACERTDIR,
2008                                                           (void *) inst->tls_cacertdir )
2009                          != LDAP_OPT_SUCCESS) {
2010                         radlog(L_ERR, "rlm_ldap: could not set "
2011                                    "LDAP_OPT_X_TLS_CACERTDIR option to %s", inst->tls_cacertdir);
2012                 }
2013         }
2014
2015         if( strcmp( TLS_DEFAULT_VERIFY, inst->tls_require_cert ) != 0 ) {
2016                 DEBUG("rlm_ldap: setting TLS Require Cert to %s",
2017                           inst->tls_require_cert);
2018         }
2019
2020
2021 #ifdef HAVE_LDAP_INT_TLS_CONFIG
2022
2023         if ( ldap_int_tls_config( NULL, LDAP_OPT_X_TLS_REQUIRE_CERT,
2024                                                           (inst->tls_require_cert) )
2025                  != LDAP_OPT_SUCCESS) {
2026                 radlog(L_ERR, "rlm_ldap: could not set "
2027                            "LDAP_OPT_X_TLS_REQUIRE_CERT option to %s",
2028                            inst->tls_require_cert);
2029         }
2030
2031 #endif
2032
2033         if(inst->tls_certfile != NULL) {
2034                 DEBUG("rlm_ldap: setting TLS Cert File to %s", inst->tls_certfile);
2035
2036                 if ( ldap_set_option( NULL, LDAP_OPT_X_TLS_CERTFILE,
2037                                                           (void *) inst->tls_certfile )
2038                          != LDAP_OPT_SUCCESS) {
2039                         radlog(L_ERR, "rlm_ldap: could not set "
2040                                    "LDAP_OPT_X_TLS_CERTFILE option to %s",
2041                                    inst->tls_certfile);
2042                 }
2043         }
2044
2045         if(inst->tls_keyfile != NULL) {
2046                 DEBUG("rlm_ldap: setting TLS Key File to %s", inst->tls_keyfile);
2047
2048                 if ( ldap_set_option( NULL, LDAP_OPT_X_TLS_KEYFILE,
2049                                                           (void *) inst->tls_keyfile )
2050                          != LDAP_OPT_SUCCESS) {
2051                         radlog(L_ERR, "rlm_ldap: could not set "
2052                                    "LDAP_OPT_X_TLS_KEYFILE option to %s",
2053                                    inst->tls_keyfile);
2054                 }
2055         }
2056
2057         if(inst->tls_randfile != NULL) {
2058                 DEBUG("rlm_ldap: setting TLS Key File to %s", inst->tls_randfile);
2059
2060                 if ( ldap_set_option( NULL, LDAP_OPT_X_TLS_RANDOM_FILE,
2061                                                           (void *) inst->tls_randfile )
2062                          != LDAP_OPT_SUCCESS) {
2063                         radlog(L_ERR, "rlm_ldap: could not set "
2064                                    "LDAP_OPT_X_TLS_RANDOM_FILE option to %s",
2065                                    inst->tls_randfile);
2066                 }
2067         }
2068         if (inst->start_tls) {
2069                 DEBUG("rlm_ldap: starting TLS");
2070                 rc = ldap_start_tls_s(ld, NULL, NULL);
2071                 if (rc != LDAP_SUCCESS) {
2072                         DEBUG("rlm_ldap: ldap_start_tls_s()");
2073                         ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
2074                         radlog(L_ERR, "rlm_ldap: could not start TLS %s", ldap_err2string(ldap_errno));
2075                         *result = RLM_MODULE_FAIL;
2076                         ldap_unbind_s(ld);
2077                         return (NULL);
2078                 }
2079         }
2080 #endif /* HAVE_LDAP_START_TLS */
2081
2082         if (inst->is_url){
2083                 DEBUG("rlm_ldap: bind as %s/%s to %s", dn, password, inst->server);
2084         }
2085         else{
2086                 DEBUG("rlm_ldap: bind as %s/%s to %s:%d", dn, password, inst->server, inst->port);
2087         }
2088         msgid = ldap_bind(ld, dn, password,LDAP_AUTH_SIMPLE);
2089         if (msgid == -1) {
2090                 ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
2091                 if(err != NULL){
2092                         ldap_get_option(ld, LDAP_OPT_ERROR_STRING, err);
2093                 }
2094                 if (inst->is_url) {
2095                         radlog(L_ERR, "rlm_ldap: %s bind to %s failed: %s",
2096                                 dn, inst->server, ldap_err2string(ldap_errno));
2097                 } else {
2098                         radlog(L_ERR, "rlm_ldap: %s bind to %s:%d failed: %s",
2099                                 dn, inst->server, inst->port,
2100                                 ldap_err2string(ldap_errno));
2101                 }
2102                 *result = RLM_MODULE_FAIL;
2103                 ldap_unbind_s(ld);
2104                 return (NULL);
2105         }
2106         DEBUG("rlm_ldap: waiting for bind result ...");
2107
2108         rc = ldap_result(ld, msgid, 1, &(inst->timeout), &res);
2109
2110         if(rc < 1) {
2111                 DEBUG("rlm_ldap: ldap_result()");
2112                 ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER, &ldap_errno);
2113                 if(err != NULL){
2114                         ldap_get_option(ld, LDAP_OPT_ERROR_STRING, err);
2115                 }
2116                 if (inst->is_url) {
2117                         radlog(L_ERR, "rlm_ldap: %s bind to %s failed: %s",
2118                                 dn, inst->server, (rc == 0) ? "timeout" : ldap_err2string(ldap_errno));
2119                 } else {
2120                         radlog(L_ERR, "rlm_ldap: %s bind to %s:%d failed: %s",
2121                                 dn, inst->server, inst->port,
2122                                 (rc == 0) ? "timeout" : ldap_err2string(ldap_errno));
2123                 }
2124                 *result = RLM_MODULE_FAIL;
2125                 ldap_unbind_s(ld);
2126                 return (NULL);
2127         }
2128         ldap_errno = ldap_result2error(ld, res, 1);
2129         switch (ldap_errno) {
2130         case LDAP_SUCCESS:
2131                 DEBUG("rlm_ldap: Bind was successful");
2132                 *result = RLM_MODULE_OK;
2133                 break;
2134
2135         case LDAP_INVALID_CREDENTIALS:
2136                 if (auth){
2137                         DEBUG("rlm_ldap: Bind failed with invalid credentials");
2138                         *result = RLM_MODULE_REJECT;
2139                 }
2140                 else {
2141                         radlog(L_ERR, "rlm_ldap: LDAP login failed: check identity, password settings in ldap section of radiusd.conf");
2142                         *result = RLM_MODULE_FAIL;
2143                 }
2144                 if(err != NULL){
2145                         ldap_get_option(ld, LDAP_OPT_ERROR_STRING, err);
2146                 }
2147                 break;
2148
2149         default:
2150                 if (inst->is_url)
2151                         radlog(L_ERR,"rlm_ldap: %s bind to %s failed %s",
2152                                 dn, inst->server, ldap_err2string(ldap_errno));
2153                 else
2154                         radlog(L_ERR,"rlm_ldap: %s bind to %s:%d failed %s",
2155                                 dn, inst->server, inst->port,
2156                                 ldap_err2string(ldap_errno));
2157                 *result = RLM_MODULE_FAIL;
2158                 if(err != NULL){
2159                         ldap_get_option(ld, LDAP_OPT_ERROR_STRING, err);
2160                 }
2161         }
2162
2163         if (*result != RLM_MODULE_OK) {
2164                 ldap_unbind_s(ld);
2165                 ld = NULL;
2166         }
2167         return ld;
2168 }
2169
2170 /*****************************************************************************
2171  *
2172  *      Detach from the LDAP server and cleanup internal state.
2173  *
2174  *****************************************************************************/
2175 static int
2176 ldap_detach(void *instance)
2177 {
2178         ldap_instance  *inst = instance;
2179         TLDAP_RADIUS *pair, *nextpair;
2180
2181         if (inst->server)
2182                 free((char *) inst->server);
2183         if (inst->login)
2184                 free((char *) inst->login);
2185         if (inst->password)
2186                 free((char *) inst->password);
2187         if (inst->basedn)
2188                 free((char *) inst->basedn);
2189         if (inst->dictionary_mapping)
2190                 free(inst->dictionary_mapping);
2191         if (inst->filter)
2192                 free((char *) inst->filter);
2193         if (inst->base_filter)
2194                 free((char *) inst->base_filter);
2195         if (inst->passwd_hdr)
2196                 free((char *) inst->passwd_hdr);
2197         if (inst->passwd_attr)
2198                 free((char *) inst->passwd_attr);
2199         if (inst->groupname_attr)
2200                 free((char *) inst->groupname_attr);
2201         if (inst->groupmemb_filt)
2202                 free((char *) inst->groupmemb_filt);
2203         if (inst->groupmemb_attr)
2204                 free((char *) inst->groupmemb_attr);
2205         if (inst->access_attr)
2206                 free((char *) inst->access_attr);
2207         if (inst->profile_attr)
2208                 free((char *) inst->profile_attr);
2209         if (inst->conns){
2210                 int i=0;
2211
2212                 for(;i<inst->num_conns;i++){
2213                         if (inst->conns[i].ld){
2214                                 ldap_unbind_s(inst->conns[i].ld);
2215                         }
2216                         pthread_mutex_destroy(&inst->conns[i].mutex);
2217                 }
2218                 free(inst->conns);
2219         }
2220
2221 #ifdef NOVELL
2222         if (inst->apc_conns){
2223                 int i;
2224
2225                 for(i = 0; i < inst->num_conns; i++){
2226                         if (inst->apc_conns[i].ld){
2227                                 ldap_unbind_s(inst->apc_conns[i].ld);
2228                         }
2229                         pthread_mutex_destroy(&inst->apc_conns[i].mutex);
2230                 }
2231                 free(inst->apc_conns);
2232         }
2233 #endif
2234
2235         pair = inst->check_item_map;
2236
2237         while (pair != NULL) {
2238                 nextpair = pair->next;
2239                 free(pair->attr);
2240                 free(pair->radius_attr);
2241                 free(pair);
2242                 pair = nextpair;
2243         }
2244
2245         pair = inst->reply_item_map;
2246
2247         while (pair != NULL) {
2248                 nextpair = pair->next;
2249                 free(pair->attr);
2250                 free(pair->radius_attr);
2251                 free(pair);
2252                 pair = nextpair;
2253         }
2254
2255         if (inst->atts)
2256                 free(inst->atts);
2257
2258         paircompare_unregister(PW_LDAP_GROUP, ldap_groupcmp);
2259         xlat_unregister(inst->xlat_name,ldap_xlat);
2260         free(inst->xlat_name);
2261
2262         free(inst);
2263
2264         return 0;
2265 }
2266
2267 #ifdef FIELDCPY
2268 static void
2269 fieldcpy(char *string, char **uptr)
2270 {
2271         char           *ptr;
2272
2273         ptr = *uptr;
2274         while (*ptr == ' ' || *ptr == '\t') {
2275                 ptr++;
2276         }
2277         if (*ptr == '"') {
2278                 ptr++;
2279                 while (*ptr != '"' && *ptr != '\0' && *ptr != '\n') {
2280                         *string++ = *ptr++;
2281                 }
2282                 *string = '\0';
2283                 if (*ptr == '"') {
2284                         ptr++;
2285                 }
2286                 *uptr = ptr;
2287                 return;
2288         }
2289         while (*ptr != ' ' && *ptr != '\t' && *ptr != '\0' && *ptr != '\n' &&
2290                *ptr != '=' && *ptr != ',') {
2291                 *string++ = *ptr++;
2292         }
2293         *string = '\0';
2294         *uptr = ptr;
2295         return;
2296 }
2297 #endif
2298 /*****************************************************************************
2299  *      Get RADIUS attributes from LDAP object
2300  *      ( according to draft-adoba-radius-05.txt
2301  *        <http://www.ietf.org/internet-drafts/draft-adoba-radius-05.txt> )
2302  *
2303  *****************************************************************************/
2304
2305 static VALUE_PAIR *
2306 ldap_pairget(LDAP * ld, LDAPMessage * entry,
2307              TLDAP_RADIUS * item_map, VALUE_PAIR **pairs,char is_check)
2308 {
2309         char          **vals;
2310         int             vals_count;
2311         int             vals_idx;
2312         char           *ptr;
2313         char           *value;
2314         TLDAP_RADIUS   *element;
2315         LRAD_TOKEN      token, operator;
2316         int             is_generic_attribute;
2317         char            buf[MAX_STRING_LEN];
2318         VALUE_PAIR     *pairlist = NULL;
2319         VALUE_PAIR     *newpair = NULL;
2320         char            do_xlat = FALSE;
2321
2322         /*
2323          *      check if there is a mapping from this LDAP attribute
2324          *      to a RADIUS attribute
2325          */
2326         for (element = item_map; element != NULL; element = element->next) {
2327                 /*
2328                  *      No mapping, skip it.
2329                  */
2330                 if ((vals = ldap_get_values(ld,entry,element->attr)) == NULL)
2331                         continue;
2332
2333                 /*
2334                  *      Check whether this is a one-to-one-mapped ldap
2335                  *      attribute or a generic attribute and set flag
2336                  *      accordingly.
2337                  */
2338                 if (strcasecmp(element->radius_attr, GENERIC_ATTRIBUTE_ID)==0)
2339                         is_generic_attribute = 1;
2340                 else
2341                         is_generic_attribute = 0;
2342
2343                 /*
2344                  *      Find out how many values there are for the
2345                  *      attribute and extract all of them.
2346                  */
2347                 vals_count = ldap_count_values(vals);
2348
2349                 for (vals_idx = 0; vals_idx < vals_count; vals_idx++) {
2350                         value = vals[vals_idx];
2351
2352                         if (is_generic_attribute) {
2353                                 /*
2354                                  *      This is a generic attribute.
2355                                  */
2356                                 LRAD_TOKEN dummy; /* makes pairread happy */
2357
2358                                 /* not sure if using pairread here is ok ... */
2359                                 if ( (newpair = pairread(&value, &dummy)) != NULL) {
2360                                         DEBUG("rlm_ldap: extracted attribute %s from generic item %s",
2361                                               newpair->name, vals[vals_idx]);
2362                                         pairadd(&pairlist, newpair);
2363                                 } else {
2364                                         radlog(L_ERR, "rlm_ldap: parsing %s failed: %s",
2365                                                element->attr, vals[vals_idx]);
2366                                 }
2367                         } else {
2368                                 /*
2369                                  *      This is a one-to-one-mapped attribute
2370                                  */
2371                                 ptr = value;
2372                                 operator = gettoken(&ptr, buf, sizeof(buf));
2373                                 if (operator < T_EQSTART || operator > T_EQEND) {
2374                                         /* no leading operator found */
2375                                         if (is_check)
2376                                                 operator = T_OP_CMP_EQ;
2377                                         else
2378                                                 operator = T_OP_EQ;
2379                                 } else {
2380                                         /* the value is after the operator */
2381                                         value = ptr;
2382                                 }
2383
2384                                 /*
2385                                  *      Do xlat if the *entire* string
2386                                  *      is quoted.
2387                                  */
2388                                 if ((value[0] == '\'' || value[0] == '"' ||
2389                                      value[0] == '`') &&
2390                                     (value[0] == value[strlen(value)-1])) {
2391                                         ptr = value;
2392                                         token = gettoken(&ptr, buf, sizeof(buf));
2393                                         switch (token) {
2394                                         /* take the unquoted string */
2395                                         case T_SINGLE_QUOTED_STRING:
2396                                         case T_DOUBLE_QUOTED_STRING:
2397                                                 value = buf;
2398                                                 break;
2399
2400                                         /* the value will be xlat'ed later */
2401                                         case T_BACK_QUOTED_STRING:
2402                                                 value = buf;
2403                                                 do_xlat = TRUE;
2404                                                 break;
2405
2406                                         /* keep the original string */
2407                                         default:
2408                                                 break;
2409                                         }
2410                                 }
2411                                 if (value[0] == '\0') {
2412                                         DEBUG("rlm_ldap: Attribute %s has no value", element->attr);
2413                                         continue;
2414                                 }
2415
2416                                 DEBUG("rlm_ldap: Adding %s as %s, value %s & op=%d", element->attr, element->radius_attr, value, operator);
2417
2418                                 /*
2419                                  *      Create the pair.
2420                                  */
2421                                 newpair = pairmake(element->radius_attr,
2422                                                    do_xlat ? NULL : value,
2423                                                    operator);
2424                                 if (newpair == NULL) {
2425                                         radlog(L_ERR, "rlm_ldap: Failed to create the pair: %s", librad_errstr);
2426                                         continue;
2427                                 }
2428                                 if (do_xlat) {
2429                                         newpair->flags.do_xlat = 1;
2430                                         strNcpy(newpair->strvalue, buf,
2431                                                 sizeof(newpair->strvalue));
2432                                         newpair->length = 0;
2433                                 }
2434
2435                                 /*
2436                                  *      Add the pair into the packet.
2437                                  */
2438                                 if (!vals_idx){
2439                                         pairdelete(pairs, newpair->attribute);
2440                                 }
2441                                 pairadd(&pairlist, newpair);
2442                         }
2443                 }
2444                 ldap_value_free(vals);
2445         }
2446
2447         return (pairlist);
2448 }
2449
2450 /* globally exported name */
2451 module_t        rlm_ldap = {
2452         "LDAP",
2453         RLM_TYPE_THREAD_SAFE,   /* type: reserved        */
2454         NULL,                   /* initialization        */
2455         ldap_instantiate,       /* instantiation         */
2456         {
2457                 ldap_authenticate,      /* authentication        */
2458                 ldap_authorize,         /* authorization         */
2459                 NULL,                   /* preaccounting         */
2460                 NULL,                   /* accounting            */
2461                 NULL,                   /* checksimul            */
2462                 NULL,                   /* pre-proxy             */
2463                 NULL,                   /* post-proxy            */
2464 #ifdef NOVELL
2465                 ldap_postauth                   /* post-auth             */
2466 #else
2467                 NULL
2468 #endif
2469         },
2470         ldap_detach,            /* detach                */
2471         NULL,                   /* destroy               */
2472 };