external/bsd/openldap/dist/servers/slapd/back-bdb/bind.c

   1 /* bind.c - bdb backend bind routine */
   2 /* $OpenLDAP: pkg/ldap/servers/slapd/back-bdb/bind.c,v 1.45.2.4 2008/02/11 23:26:45 kurt Exp $ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2000-2008 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
  17 #include "portable.h"
  18
  19 #include <stdio.h>
  20 #include <ac/string.h>
  21 #include <ac/unistd.h>
  22
  23 #include "back-bdb.h"
  24
  25 int
  26 bdb_bind( Operation *op, SlapReply *rs )
  27 {
  28         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
  29         Entry           *e;
  30         Attribute       *a;
  31         EntryInfo       *ei;
  32
  33         AttributeDescription *password = slap_schema.si_ad_userPassword;
  34
  35         BDB_LOCKER      locker;
  36         DB_LOCK         lock;
  37
  38         Debug( LDAP_DEBUG_ARGS,
  39                 "==> " LDAP_XSTRING(bdb_bind) ": dn: %s\n",
  40                 op->o_req_dn.bv_val, 0, 0);
  41
  42         /* allow noauth binds */
  43         switch ( be_rootdn_bind( op, NULL ) ) {
  44         case LDAP_SUCCESS:
  45                 /* frontend will send result */
  46                 return rs->sr_err;
  47
  48         default:
  49                 /* give the database a chanche */
  50                 /* NOTE: this behavior departs from that of other backends,
  51                  * since the others, in case of password checking failure
  52                  * do not give the database a chance.  If an entry with
  53                  * rootdn's name does not exist in the database the result
  54                  * will be the same.  See ITS#4962 for discussion. */
  55                 break;
  56         }
  57
  58         rs->sr_err = LOCK_ID(bdb->bi_dbenv, &locker);
  59         switch(rs->sr_err) {
  60         case 0:
  61                 break;
  62         default:
  63                 rs->sr_text = "internal error";
  64                 send_ldap_result( op, rs );
  65                 return rs->sr_err;
  66         }
  67
  68 dn2entry_retry:
  69         /* get entry with reader lock */
  70         rs->sr_err = bdb_dn2entry( op, NULL, &op->o_req_ndn, &ei, 1,
  71                 locker, &lock );
  72
  73         switch(rs->sr_err) {
  74         case DB_NOTFOUND:
  75         case 0:
  76                 break;
  77         case LDAP_BUSY:
  78                 send_ldap_error( op, rs, LDAP_BUSY, "ldap_server_busy" );
  79                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
  80                 return LDAP_BUSY;
  81         case DB_LOCK_DEADLOCK:
  82         case DB_LOCK_NOTGRANTED:
  83                 goto dn2entry_retry;
  84         default:
  85                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
  86                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
  87                 return rs->sr_err;
  88         }
  89
  90         e = ei->bei_e;
  91         if ( rs->sr_err == DB_NOTFOUND ) {
  92                 if( e != NULL ) {
  93                         bdb_cache_return_entry_r( bdb, e, &lock );
  94                         e = NULL;
  95                 }
  96
  97                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
  98                 send_ldap_result( op, rs );
  99
 100                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
 101
 102                 return rs->sr_err;
 103         }
 104
 105         ber_dupbv( &op->oq_bind.rb_edn, &e->e_name );
 106
 107         /* check for deleted */
 108         if ( is_entry_subentry( e ) ) {
 109                 /* entry is an subentry, don't allow bind */
 110                 Debug( LDAP_DEBUG_TRACE, "entry is subentry\n", 0,
 111                         0, 0 );
 112                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 113                 goto done;
 114         }
 115
 116         if ( is_entry_alias( e ) ) {
 117                 /* entry is an alias, don't allow bind */
 118                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0, 0, 0 );
 119                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 120                 goto done;
 121         }
 122
 123         if ( is_entry_referral( e ) ) {
 124                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 125                         0, 0 );
 126                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 127                 goto done;
 128         }
 129
 130         switch ( op->oq_bind.rb_method ) {
 131         case LDAP_AUTH_SIMPLE:
 132                 a = attr_find( e->e_attrs, password );
 133                 if ( a == NULL ) {
 134                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 135                         goto done;
 136                 }
 137
 138                 if ( slap_passwd_check( op, e, a, &op->oq_bind.rb_cred,
 139                                         &rs->sr_text ) != 0 )
 140                 {
 141                         /* failure; stop front end from sending result */
 142                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 143                         goto done;
 144                 }
 145
 146                 rs->sr_err = 0;
 147                 break;
 148
 149         default:
 150                 assert( 0 ); /* should not be reachable */
 151                 rs->sr_err = LDAP_STRONG_AUTH_NOT_SUPPORTED;
 152                 rs->sr_text = "authentication method not supported";
 153         }
 154
 155 done:
 156         /* free entry and reader lock */
 157         if( e != NULL ) {
 158                 bdb_cache_return_entry_r( bdb, e, &lock );
 159         }
 160
 161         LOCK_ID_FREE(bdb->bi_dbenv, locker);
 162
 163         if ( rs->sr_err ) {
 164                 send_ldap_result( op, rs );
 165                 if ( rs->sr_ref ) {
 166                         ber_bvarray_free( rs->sr_ref );
 167                         rs->sr_ref = NULL;
 168                 }
 169         }
 170         /* front end will send result on success (rs->sr_err==0) */
 171         return rs->sr_err;
 172 }