git.sur5r.net Git - openldap/blob - servers/slapd/back-passwd/search.c

   1 /* search.c - /etc/passwd backend search function */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2018 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  17  * All rights reserved.
  18  *
  19  * Redistribution and use in source and binary forms are permitted
  20  * provided that this notice is preserved and that due credit is given
  21  * to the University of Michigan at Ann Arbor. The name of the University
  22  * may not be used to endorse or promote products derived from this
  23  * software without specific prior written permission. This software
  24  * is provided ``as is'' without express or implied warranty.
  25  */
  26 /* ACKNOWLEDGEMENTS:
  27  * This work was originally developed by the University of Michigan
  28  * (as part of U-MICH LDAP).  Additional significant contributors
  29  * include:
  30  *     Hallvard B. Furuseth
  31  *     Howard Chu
  32  *     Kurt D. Zeilenga
  33  */
  34
  35 #include "portable.h"
  36
  37 #include <stdio.h>
  38
  39 #include <ac/ctype.h>
  40 #include <ac/socket.h>
  41 #include <ac/string.h>
  42 #include <ac/time.h>
  43
  44 #include <pwd.h>
  45
  46 #include "slap.h"
  47 #include "back-passwd.h"
  48
  49 static void pw_start( Backend *be );
  50
  51 static int pw2entry(
  52         Backend         *be,
  53         struct passwd   *pw,
  54         Entry           *ep );
  55
  56 int
  57 passwd_back_search(
  58     Operation   *op,
  59     SlapReply   *rs )
  60 {
  61         struct passwd   *pw;
  62         time_t          stoptime = (time_t)-1;
  63
  64         LDAPRDN rdn = NULL;
  65         struct berval parent = BER_BVNULL;
  66
  67         AttributeDescription *ad_objectClass = slap_schema.si_ad_objectClass;
  68
  69         if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
  70                 stoptime = op->o_time + op->ors_tlimit;
  71         }
  72
  73         /* Handle a query for the base of this backend */
  74         if ( be_issuffix( op->o_bd, &op->o_req_ndn ) ) {
  75                 struct berval   val;
  76
  77                 rs->sr_matched = op->o_req_dn.bv_val;
  78
  79                 if( op->ors_scope != LDAP_SCOPE_ONELEVEL ) {
  80                         AttributeDescription    *desc = NULL;
  81                         char                    *next;
  82                         Entry                   e = { 0 };
  83
  84                         /* Create an entry corresponding to the base DN */
  85                         e.e_name.bv_val = ch_strdup( op->o_req_dn.bv_val );
  86                         e.e_name.bv_len = op->o_req_dn.bv_len;
  87                         e.e_nname.bv_val =  ch_strdup( op->o_req_ndn.bv_val );
  88                         e.e_nname.bv_len = op->o_req_ndn.bv_len;
  89
  90                         /* Use the first attribute of the DN
  91                         * as an attribute within the entry itself.
  92                         */
  93                         if( ldap_bv2rdn( &op->o_req_dn, &rdn, &next,
  94                                 LDAP_DN_FORMAT_LDAP ) )
  95                         {
  96                                 rs->sr_err = LDAP_INVALID_DN_SYNTAX;
  97                                 goto done;
  98                         }
  99
 100                         if( slap_bv2ad( &rdn[0]->la_attr, &desc, &rs->sr_text )) {
 101                                 rs->sr_err = LDAP_NO_SUCH_OBJECT;
 102                                 ldap_rdnfree(rdn);
 103                                 goto done;
 104                         }
 105
 106                         attr_merge_normalize_one( &e, desc, &rdn[0]->la_value, NULL );
 107
 108                         ldap_rdnfree(rdn);
 109                         rdn = NULL;
 110
 111                         /* Every entry needs an objectclass. We don't really
 112                          * know if our hardcoded choice here agrees with the
 113                          * DN that was configured for this backend, but it's
 114                          * better than nothing.
 115                          *
 116                          * should be a configurable item
 117                          */
 118                         BER_BVSTR( &val, "organizationalUnit" );
 119                         attr_merge_one( &e, ad_objectClass, &val, NULL );
 120
 121                         if ( test_filter( op, &e, op->ors_filter ) == LDAP_COMPARE_TRUE ) {
 122                                 rs->sr_entry = &e;
 123                                 rs->sr_attrs = op->ors_attrs;
 124                                 rs->sr_flags = REP_ENTRY_MODIFIABLE;
 125                                 send_search_entry( op, rs );
 126                                 rs->sr_flags = 0;
 127                                 rs->sr_attrs = NULL;
 128                         }
 129
 130                         entry_clean( &e );
 131                 }
 132
 133                 if ( op->ors_scope != LDAP_SCOPE_BASE ) {
 134                         /* check all our "children" */
 135
 136                         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 137                         pw_start( op->o_bd );
 138                         for ( pw = getpwent(); pw != NULL; pw = getpwent() ) {
 139                                 Entry           e = { 0 };
 140
 141                                 /* check for abandon */
 142                                 if ( op->o_abandon ) {
 143                                         endpwent();
 144                                         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 145                                         return( SLAPD_ABANDON );
 146                                 }
 147
 148                                 /* check time limit */
 149                                 if ( op->ors_tlimit != SLAP_NO_LIMIT
 150                                                 && slap_get_time() > stoptime )
 151                                 {
 152                                         send_ldap_error( op, rs, LDAP_TIMELIMIT_EXCEEDED, NULL );
 153                                         endpwent();
 154                                         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 155                                         return( 0 );
 156                                 }
 157
 158                                 if ( pw2entry( op->o_bd, pw, &e ) ) {
 159                                         rs->sr_err = LDAP_OTHER;
 160                                         endpwent();
 161                                         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 162                                         goto done;
 163                                 }
 164
 165                                 if ( test_filter( op, &e, op->ors_filter ) == LDAP_COMPARE_TRUE ) {
 166                                         /* check size limit */
 167                                         if ( --op->ors_slimit == -1 ) {
 168                                                 send_ldap_error( op, rs, LDAP_SIZELIMIT_EXCEEDED, NULL );
 169                                                 endpwent();
 170                                                 ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 171                                                 return( 0 );
 172                                         }
 173
 174                                         rs->sr_entry = &e;
 175                                         rs->sr_attrs = op->ors_attrs;
 176                                         rs->sr_flags = REP_ENTRY_MODIFIABLE;
 177                                         send_search_entry( op, rs );
 178                                         rs->sr_flags = 0;
 179                                         rs->sr_entry = NULL;
 180                                 }
 181
 182                                 entry_clean( &e );
 183                         }
 184                         endpwent();
 185                         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 186                 }
 187
 188         } else {
 189                 char    *next;
 190                 Entry   e = { 0 };
 191                 int     rc;
 192
 193                 if (! be_issuffix( op->o_bd, &op->o_req_ndn ) ) {
 194                         dnParent( &op->o_req_ndn, &parent );
 195                 }
 196
 197                 /* This backend is only one layer deep. Don't answer requests for
 198                  * anything deeper than that.
 199                  */
 200                 if( !be_issuffix( op->o_bd, &parent ) ) {
 201                         int i;
 202                         for( i=0; op->o_bd->be_nsuffix[i].bv_val != NULL; i++ ) {
 203                                 if( dnIsSuffix( &op->o_req_ndn, &op->o_bd->be_nsuffix[i] ) ) {
 204                                         rs->sr_matched = op->o_bd->be_suffix[i].bv_val;
 205                                         break;
 206                                 }
 207                         }
 208                         rs->sr_err = LDAP_NO_SUCH_OBJECT;
 209                         goto done;
 210                 }
 211
 212                 if( op->ors_scope == LDAP_SCOPE_ONELEVEL ) {
 213                         goto done;
 214                 }
 215
 216                 if ( ldap_bv2rdn( &op->o_req_dn, &rdn, &next,
 217                         LDAP_DN_FORMAT_LDAP ))
 218                 {
 219                         rs->sr_err = LDAP_OTHER;
 220                         goto done;
 221                 }
 222
 223                 ldap_pvt_thread_mutex_lock( &passwd_mutex );
 224                 pw_start( op->o_bd );
 225                 pw = getpwnam( rdn[0]->la_value.bv_val );
 226                 if ( pw == NULL ) {
 227                         rs->sr_matched = parent.bv_val;
 228                         rs->sr_err = LDAP_NO_SUCH_OBJECT;
 229                         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 230                         goto done;
 231                 }
 232
 233                 rc = pw2entry( op->o_bd, pw, &e );
 234                 ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 235                 if ( rc ) {
 236                         rs->sr_err = LDAP_OTHER;
 237                         goto done;
 238                 }
 239
 240                 if ( test_filter( op, &e, op->ors_filter ) == LDAP_COMPARE_TRUE ) {
 241                         rs->sr_entry = &e;
 242                         rs->sr_attrs = op->ors_attrs;
 243                         rs->sr_flags = REP_ENTRY_MODIFIABLE;
 244                         send_search_entry( op, rs );
 245                         rs->sr_flags = 0;
 246                         rs->sr_entry = NULL;
 247                         rs->sr_attrs = NULL;
 248                 }
 249
 250                 entry_clean( &e );
 251         }
 252
 253 done:
 254         if( rs->sr_err != LDAP_NO_SUCH_OBJECT ) rs->sr_matched = NULL;
 255         send_ldap_result( op, rs );
 256
 257         if( rdn != NULL ) ldap_rdnfree( rdn );
 258
 259         return( 0 );
 260 }
 261
 262 static void
 263 pw_start(
 264         Backend *be
 265 )
 266 {
 267         endpwent();
 268
 269 #ifdef HAVE_SETPWFILE
 270         if ( be->be_private != NULL ) {
 271                 (void) setpwfile( (char *) be->be_private );
 272         }
 273 #endif /* HAVE_SETPWFILE */
 274 }
 275
 276 static int
 277 pw2entry( Backend *be, struct passwd *pw, Entry *e )
 278 {
 279         size_t          pwlen;
 280         struct berval   val;
 281         struct berval   bv;
 282
 283         int             rc;
 284
 285         /*
 286          * from pw we get pw_name and make it cn
 287          * give it an objectclass of person.
 288          */
 289
 290         pwlen = strlen( pw->pw_name );
 291         val.bv_len = STRLENOF("uid=,") + ( pwlen + be->be_suffix[0].bv_len );
 292         val.bv_val = ch_malloc( val.bv_len + 1 );
 293
 294         /* rdn attribute type should be a configurable item */
 295         sprintf( val.bv_val, "uid=%s,%s",
 296                 pw->pw_name, be->be_suffix[0].bv_val );
 297
 298         rc = dnNormalize( 0, NULL, NULL, &val, &bv, NULL );
 299         if( rc != LDAP_SUCCESS ) {
 300                 free( val.bv_val );
 301                 return( -1 );
 302         }
 303
 304         e->e_name = val;
 305         e->e_nname = bv;
 306
 307         e->e_attrs = NULL;
 308
 309         /* objectclasses should be configurable items */
 310         BER_BVSTR( &val, "person" );
 311         attr_merge_one( e, slap_schema.si_ad_objectClass, &val, NULL );
 312
 313         BER_BVSTR( &val, "uidObject" );
 314         attr_merge_one( e, slap_schema.si_ad_objectClass, &val, NULL );
 315
 316         val.bv_val = pw->pw_name;
 317         val.bv_len = pwlen;
 318         attr_merge_normalize_one( e, slap_schema.si_ad_uid, &val, NULL );       /* required by uidObject */
 319         attr_merge_normalize_one( e, slap_schema.si_ad_cn, &val, NULL );        /* required by person */
 320         attr_merge_normalize_one( e, ad_sn, &val, NULL );       /* required by person */
 321
 322 #ifdef HAVE_STRUCT_PASSWD_PW_GECOS
 323         /*
 324          * if gecos is present, add it as a cn. first process it
 325          * according to standard BSD usage. If the processed cn has
 326          * a space, use the tail as the surname.
 327          */
 328         if (pw->pw_gecos[0]) {
 329                 char *s;
 330                 char buf[1024];
 331
 332                 ber_str2bv( pw->pw_gecos, 0, 0, &val );
 333                 attr_merge_normalize_one( e, ad_desc, &val, NULL );
 334
 335                 s = ber_bvchr( &val, ',' );
 336                 if ( s ) *s = '\0';
 337
 338                 s = ber_bvchr( &val, '&' );
 339                 if ( s ) {
 340                         if( val.bv_len + pwlen < sizeof(buf) ) {
 341                                 int i = s - val.bv_val;
 342                                 strncpy( buf, val.bv_val, i );
 343                                 s = buf + i;
 344                                 strcpy( s, pw->pw_name );
 345                                 *s = TOUPPER((unsigned char)*s);
 346                                 strcat( s, val.bv_val + i + 1 );
 347                                 val.bv_val = buf;
 348                         }
 349                 }
 350                 val.bv_len = strlen( val.bv_val );
 351
 352                 if ( val.bv_len && strcasecmp( val.bv_val, pw->pw_name ) ) {
 353                         attr_merge_normalize_one( e, slap_schema.si_ad_cn, &val, NULL );
 354                 }
 355
 356                 if ( ( s = strrchr(val.bv_val, ' ' ) ) ) {
 357                         ber_str2bv( s + 1, 0, 0, &val );
 358                         attr_merge_normalize_one( e, ad_sn, &val, NULL );
 359                 }
 360         }
 361 #endif /* HAVE_STRUCT_PASSWD_PW_GECOS */
 362
 363         return( 0 );
 364 }