citadel/ldap.c

   1 /*
   2  * $Id$
   3  *
   4  * These functions implement the portions of AUTHMODE_LDAP and AUTHMODE_LDAP_AD which
   5  * actually speak to the LDAP server.
   6  *
   7  * Copyright (c) 2009 by Art Cancro and the citadel.org development team.
   8  * This program is released under the terms of the GNU General Public License v3
   9  */
  10
  11
  12 int ctdl_require_ldap_version = 3;
  13
  14
  15 #include "sysdep.h"
  16 #include <errno.h>
  17 #include <stdlib.h>
  18 #include <unistd.h>
  19 #include <stdio.h>
  20 #include <fcntl.h>
  21 #include <signal.h>
  22 #include <pwd.h>
  23 #include <ctype.h>
  24 #include <sys/types.h>
  25 #include <sys/wait.h>
  26 #ifdef HAVE_SYS_STAT_H
  27 #include <sys/stat.h>
  28 #endif
  29
  30 #if TIME_WITH_SYS_TIME
  31 # include <sys/time.h>
  32 # include <time.h>
  33 #else
  34 # if HAVE_SYS_TIME_H
  35 #  include <sys/time.h>
  36 # else
  37 #  include <time.h>
  38 # endif
  39 #endif
  40
  41 #include <string.h>
  42 #include <limits.h>
  43 #include <libcitadel.h>
  44 #include "auth.h"
  45 #include "citadel.h"
  46 #include "server.h"
  47 #include "database.h"
  48 #include "user_ops.h"
  49 #include "sysdep_decls.h"
  50 #include "support.h"
  51 #include "room_ops.h"
  52 #include "file_ops.h"
  53 #include "control.h"
  54 #include "msgbase.h"
  55 #include "config.h"
  56 #include "citserver.h"
  57 #include "citadel_dirs.h"
  58 #include "genstamp.h"
  59 #include "threads.h"
  60 #include "citadel_ldap.h"
  61
  62 #include "ctdl_module.h"
  63
  64
  65 #ifdef HAVE_LDAP
  66
  67 #define LDAP_DEPRECATED 1       /* Needed to suppress misleading warnings */
  68
  69 #include <ldap.h>
  70
  71 int CtdlTryUserLDAP(char *username,
  72                 char *found_dn, int found_dn_size,
  73                 char *fullname, int fullname_size,
  74                 uid_t *uid)
  75 {
  76         LDAP *ldserver = NULL;
  77         int i;
  78         LDAPMessage *search_result = NULL;
  79         LDAPMessage *entry = NULL;
  80         char searchstring[1024];
  81         struct timeval tv;
  82         char **values;
  83         char *user_dn = NULL;
  84
  85         if (fullname) safestrncpy(fullname, username, fullname_size);
  86
  87         ldserver = ldap_init(config.c_ldap_host, config.c_ldap_port);
  88         if (ldserver == NULL) {
  89                 CtdlLogPrintf(CTDL_ALERT, "LDAP: Could not connect to %s:%d : %s\n",
  90                         config.c_ldap_host, config.c_ldap_port,
  91                         strerror(errno));
  92                 return(errno);
  93         }
  94
  95         ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
  96
  97         striplt(config.c_ldap_bind_dn);
  98         striplt(config.c_ldap_bind_pw);
  99         i = ldap_simple_bind_s(ldserver,
 100                 (!IsEmptyStr(config.c_ldap_bind_dn) ? config.c_ldap_bind_dn : NULL),
 101                 (!IsEmptyStr(config.c_ldap_bind_pw) ? config.c_ldap_bind_pw : NULL)
 102         );
 103         if (i != LDAP_SUCCESS) {
 104                 CtdlLogPrintf(CTDL_ALERT, "LDAP: Cannot bind: %s (%d)\n", ldap_err2string(i), i);
 105                 return(i);
 106         }
 107
 108         tv.tv_sec = 10;
 109         tv.tv_usec = 0;
 110
 111         if (config.c_auth_mode == AUTHMODE_LDAP_AD) {
 112                 sprintf(searchstring, "(sAMAccountName=%s)", username);
 113         }
 114         else {
 115                 sprintf(searchstring, "(&(objectclass=posixAccount)(uid=%s))", username);
 116         }
 117
 118         i = ldap_search_st(ldserver,
 119                 config.c_ldap_base_dn,
 120                 LDAP_SCOPE_SUBTREE,
 121                 searchstring,
 122                 NULL,   // return all attributes
 123                 0,      // attributes + values
 124                 &tv,    // timeout
 125                 &search_result
 126         );
 127         if (i != LDAP_SUCCESS) {
 128                 CtdlLogPrintf(CTDL_DEBUG,
 129                         "Couldn't find what I was looking for: %s (%d)\n", ldap_err2string(i), i);
 130                 ldap_unbind(ldserver);
 131                 return(i);
 132         }
 133
 134         if (search_result == NULL) {
 135                 CtdlLogPrintf(CTDL_DEBUG, "No results were returned\n");
 136                 ldap_unbind(ldserver);
 137                 return(2);
 138         }
 139
 140         /* At this point we've got at least one result from our query.  If there are multiple
 141          * results, we still only look at the first one.
 142          */
 143         entry = ldap_first_entry(ldserver, search_result);
 144         if (entry) {
 145
 146                 user_dn = ldap_get_dn(ldserver, entry);
 147                 if (user_dn) {
 148                         CtdlLogPrintf(CTDL_DEBUG, "dn = %s\n", user_dn);
 149                 }
 150
 151                 if (config.c_auth_mode == AUTHMODE_LDAP_AD) {
 152                         values = ldap_get_values(ldserver, search_result, "displayName");
 153                         if (values) {
 154                                 if (values[0]) {
 155                                         if (fullname) safestrncpy(fullname, values[0], fullname_size);
 156                                         CtdlLogPrintf(CTDL_DEBUG, "displayName = %s\n", values[0]);
 157                                 }
 158                                 ldap_value_free(values);
 159                         }
 160                 }
 161                 else {
 162                         values = ldap_get_values(ldserver, search_result, "cn");
 163                         if (values) {
 164                                 if (values[0]) {
 165                                         if (fullname) safestrncpy(fullname, values[0], fullname_size);
 166                                         CtdlLogPrintf(CTDL_DEBUG, "cn = %s\n", values[0]);
 167                                 }
 168                                 ldap_value_free(values);
 169                         }
 170                 }
 171
 172                 if (config.c_auth_mode == AUTHMODE_LDAP_AD) {
 173                         values = ldap_get_values(ldserver, search_result, "objectGUID");
 174                         if (values) {
 175                                 if (values[0]) {
 176                                         if (uid != NULL) {
 177                                                 *uid = abs(HashLittle(values[0], strlen(values[0])));
 178                                                 CtdlLogPrintf(CTDL_DEBUG, "uid hashed from objectGUID = %d\n", *uid);
 179                                         }
 180                                 }
 181                                 ldap_value_free(values);
 182                         }
 183                 }
 184                 else {
 185                         values = ldap_get_values(ldserver, search_result, "uidNumber");
 186                         if (values) {
 187                                 if (values[0]) {
 188                                         CtdlLogPrintf(CTDL_DEBUG, "uidNumber = %s\n", values[0]);
 189                                         if (uid != NULL) {
 190                                                 *uid = atoi(values[0]);
 191                                         }
 192                                 }
 193                                 ldap_value_free(values);
 194                         }
 195                 }
 196
 197         }
 198
 199         /* free the results */
 200         ldap_msgfree(search_result);
 201
 202         /* unbind so we can go back in as the authenticating user */
 203         ldap_unbind(ldserver);
 204
 205         if (!user_dn) {
 206                 CtdlLogPrintf(CTDL_DEBUG, "No such user was found.\n");
 207                 return(4);
 208         }
 209
 210         if (found_dn) safestrncpy(found_dn, user_dn, found_dn_size);
 211         ldap_memfree(user_dn);
 212         return(0);
 213 }
 214
 215
 216 int CtdlTryPasswordLDAP(char *user_dn, char *password)
 217 {
 218         LDAP *ldserver = NULL;
 219         int i = (-1);
 220
 221         ldserver = ldap_init(config.c_ldap_host, config.c_ldap_port);
 222         if (ldserver) {
 223                 ldap_set_option(ldserver, LDAP_OPT_PROTOCOL_VERSION, &ctdl_require_ldap_version);
 224                 i = ldap_simple_bind_s(ldserver, user_dn, password);
 225                 if (i == LDAP_SUCCESS) {
 226                         CtdlLogPrintf(CTDL_DEBUG, "LDAP: bind succeeded\n");
 227                 }
 228                 else {
 229                         CtdlLogPrintf(CTDL_DEBUG, "LDAP: Cannot bind: %s (%d)\n", ldap_err2string(i), i);
 230                 }
 231                 ldap_unbind(ldserver);
 232         }
 233
 234         if (i == LDAP_SUCCESS) {
 235                 return(0);
 236         }
 237
 238         return(1);
 239 }
 240
 241
 242 /*
 243  * Learn LDAP attributes and stuff them into the vCard.
 244  * Returns nonzero if we changed anything.
 245  */
 246 int Ctdl_LDAP_to_vCard(char *ldap_dn, struct vCard *v)
 247 {
 248         if (!ldap_dn) return(0);
 249         if (!v) return(0);
 250
 251         /*
 252          * FIXME LDAPSTUB this is a stub function
 253          *
 254          * ldap_dn will contain the DN of the user, and v will contain a pointer to
 255          * the vCard that needs to be (re-)populated.  Put the requisite LDAP code here.
 256          *
 257         vcard_set_prop(v, "email;internet", xxx, 0);
 258         return(1);      * return nonzero to tell the caller that we made changes that need to be saved *
 259          *
 260          */
 261
 262         return(0);      /* return zero to tell the caller that we didn't make any changes */
 263 }
 264
 265 #endif /* HAVE_LDAP */