git.sur5r.net Git - openldap/blob - servers/slapd/back-bdb/bind.c

   1 /* bind.c - bdb backend bind routine */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2000-2005 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/krb.h>
  21 #include <ac/string.h>
  22 #include <ac/unistd.h>
  23
  24 #include "back-bdb.h"
  25
  26 int
  27 bdb_bind( Operation *op, SlapReply *rs )
  28 {
  29         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
  30         Entry           *e;
  31         Attribute       *a;
  32         EntryInfo       *ei;
  33 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
  34         char            krbname[MAX_K_NAME_SZ + 1];
  35         AttributeDescription *krbattr = slap_schema.si_ad_krbName;
  36         struct berval   krbval;
  37         AUTH_DAT        ad;
  38 #endif
  39
  40         AttributeDescription *password = slap_schema.si_ad_userPassword;
  41
  42         u_int32_t       locker;
  43         DB_LOCK         lock;
  44
  45         Debug( LDAP_DEBUG_ARGS,
  46                 "==> " LDAP_XSTRING(bdb_bind) ": dn: %s\n",
  47                 op->o_req_dn.bv_val, 0, 0);
  48
  49         /* allow noauth binds */
  50         if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op )) {
  51                 ber_dupbv( &op->oq_bind.rb_edn, be_root_dn( op->o_bd ) );
  52                 /* front end will send result */
  53                 return LDAP_SUCCESS;
  54         }
  55
  56         rs->sr_err = LOCK_ID(bdb->bi_dbenv, &locker);
  57         switch(rs->sr_err) {
  58         case 0:
  59                 break;
  60         default:
  61                 rs->sr_text = "internal error";
  62                 send_ldap_result( op, rs );
  63                 return rs->sr_err;
  64         }
  65
  66 dn2entry_retry:
  67         /* get entry with reader lock */
  68         rs->sr_err = bdb_dn2entry( op, NULL, &op->o_req_ndn, &ei, 1,
  69                 locker, &lock );
  70
  71         switch(rs->sr_err) {
  72         case DB_NOTFOUND:
  73         case 0:
  74                 break;
  75         case LDAP_BUSY:
  76                 send_ldap_error( op, rs, LDAP_BUSY, "ldap_server_busy" );
  77                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
  78                 return LDAP_BUSY;
  79         case DB_LOCK_DEADLOCK:
  80         case DB_LOCK_NOTGRANTED:
  81                 goto dn2entry_retry;
  82         default:
  83                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
  84                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
  85                 return rs->sr_err;
  86         }
  87
  88         e = ei->bei_e;
  89         if ( rs->sr_err == DB_NOTFOUND ) {
  90                 if( e != NULL ) {
  91                         bdb_cache_return_entry_r( bdb->bi_dbenv,
  92                                 &bdb->bi_cache, e, &lock );
  93                         e = NULL;
  94                 }
  95
  96                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
  97                 send_ldap_result( op, rs );
  98
  99                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
 100
 101                 return rs->sr_err;
 102         }
 103
 104         ber_dupbv( &op->oq_bind.rb_edn, &e->e_name );
 105
 106         /* check for deleted */
 107 #ifdef BDB_SUBENTRIES
 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 #endif
 116
 117         if ( is_entry_alias( e ) ) {
 118                 /* entry is an alias, don't allow bind */
 119                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0, 0, 0 );
 120                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 121                 goto done;
 122         }
 123
 124         if ( is_entry_referral( e ) ) {
 125                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 126                         0, 0 );
 127                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 128                 goto done;
 129         }
 130
 131         switch ( op->oq_bind.rb_method ) {
 132         case LDAP_AUTH_SIMPLE:
 133                 a = attr_find( e->e_attrs, password );
 134                 if ( a == NULL ) {
 135                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 136                         goto done;
 137                 }
 138
 139                 if ( slap_passwd_check( op, e, a, &op->oq_bind.rb_cred,
 140                                         &rs->sr_text ) != 0 )
 141                 {
 142                         /* failure; stop front end from sending result */
 143                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 144                         goto done;
 145                 }
 146
 147                 rs->sr_err = 0;
 148                 break;
 149
 150 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 151         case LDAP_AUTH_KRBV41:
 152                 if ( krbv4_ldap_auth( op->o_bd, &op->oq_bind.rb_cred, &ad )
 153                         != LDAP_SUCCESS )
 154                 {
 155                         rs->sr_err = LDAP_INVALID_CREDENTIALS,
 156                         goto done;
 157                 }
 158
 159                 rs->sr_err = access_allowed( op, e,
 160                         krbattr, NULL, ACL_AUTH, NULL );
 161                 if ( ! rs->sr_err ) {
 162                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS,
 163                         goto done;
 164                 }
 165
 166                 krbval.bv_len = sprintf( krbname, "%s%s%s@%s", ad.pname,
 167                         *ad.pinst ? "." : "", ad.pinst, ad.prealm );
 168
 169                 if ( (a = attr_find( e->e_attrs, krbattr )) == NULL ) {
 170                         /*
 171                          * no krbname values present: check against DN
 172                          */
 173                         if ( strcasecmp( op->o_req_dn.bv_val, krbname ) == 0 ) {
 174                                 rs->sr_err = 0;
 175                                 break;
 176                         }
 177                         rs->sr_err = LDAP_INAPPROPRIATE_AUTH,
 178                         goto done;
 179
 180                 } else {        /* look for krbname match */
 181                         krbval.bv_val = krbname;
 182
 183                         if ( value_find( a->a_desc, a->a_vals, &krbval ) != 0 ) {
 184                                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 185                                 goto done;
 186                         }
 187                 }
 188                 rs->sr_err = 0;
 189                 break;
 190 #endif
 191
 192         default:
 193                 assert( 0 ); /* should not be unreachable */
 194                 rs->sr_err = LDAP_STRONG_AUTH_NOT_SUPPORTED;
 195                 rs->sr_text = "authentication method not supported";
 196         }
 197
 198 done:
 199         /* free entry and reader lock */
 200         if( e != NULL ) {
 201                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
 202         }
 203
 204         LOCK_ID_FREE(bdb->bi_dbenv, locker);
 205
 206         if ( rs->sr_err ) {
 207                 send_ldap_result( op, rs );
 208                 if ( rs->sr_ref ) {
 209                         ber_bvarray_free( rs->sr_ref );
 210                         rs->sr_ref = NULL;
 211                 }
 212         }
 213         /* front end will send result on success (rs->sr_err==0) */
 214         return rs->sr_err;
 215 }