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 #include "external.h"
  26
  27 int
  28 bdb_bind( Operation *op, SlapReply *rs )
  29 {
  30         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
  31         Entry           *e;
  32         Attribute       *a;
  33         EntryInfo       *ei;
  34 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
  35         char            krbname[MAX_K_NAME_SZ + 1];
  36         AttributeDescription *krbattr = slap_schema.si_ad_krbName;
  37         struct berval   krbval;
  38         AUTH_DAT        ad;
  39 #endif
  40
  41         AttributeDescription *password = slap_schema.si_ad_userPassword;
  42
  43         u_int32_t       locker;
  44         DB_LOCK         lock;
  45
  46         Debug( LDAP_DEBUG_ARGS,
  47                 "==> " LDAP_XSTRING(bdb_bind) ": dn: %s\n",
  48                 op->o_req_dn.bv_val, 0, 0);
  49
  50         /* allow noauth binds */
  51         if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op )) {
  52                 ber_dupbv( &op->oq_bind.rb_edn, be_root_dn( op->o_bd ) );
  53                 /* front end will send result */
  54                 return LDAP_SUCCESS;
  55         }
  56
  57         rs->sr_err = LOCK_ID(bdb->bi_dbenv, &locker);
  58         switch(rs->sr_err) {
  59         case 0:
  60                 break;
  61         default:
  62                 rs->sr_text = "internal error";
  63                 send_ldap_result( op, rs );
  64                 return rs->sr_err;
  65         }
  66
  67 dn2entry_retry:
  68         /* get entry with reader lock */
  69         rs->sr_err = bdb_dn2entry( op, NULL, &op->o_req_ndn, &ei, 1,
  70                 locker, &lock );
  71
  72         switch(rs->sr_err) {
  73         case DB_NOTFOUND:
  74         case 0:
  75                 break;
  76         case LDAP_BUSY:
  77                 send_ldap_error( op, rs, LDAP_BUSY, "ldap_server_busy" );
  78                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
  79                 return LDAP_BUSY;
  80         case DB_LOCK_DEADLOCK:
  81         case DB_LOCK_NOTGRANTED:
  82                 goto dn2entry_retry;
  83         default:
  84                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
  85                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
  86                 return rs->sr_err;
  87         }
  88
  89         e = ei->bei_e;
  90         if ( rs->sr_err == DB_NOTFOUND ) {
  91                 if( e != NULL ) {
  92                         bdb_cache_return_entry_r( bdb->bi_dbenv,
  93                                 &bdb->bi_cache, 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 #ifdef BDB_SUBENTRIES
 109         if ( is_entry_subentry( e ) ) {
 110                 /* entry is an subentry, don't allow bind */
 111                 Debug( LDAP_DEBUG_TRACE, "entry is subentry\n", 0,
 112                         0, 0 );
 113                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 114                 goto done;
 115         }
 116 #endif
 117
 118         if ( is_entry_alias( e ) ) {
 119                 /* entry is an alias, don't allow bind */
 120                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0, 0, 0 );
 121                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 122                 goto done;
 123         }
 124
 125         if ( is_entry_referral( e ) ) {
 126                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 127                         0, 0 );
 128                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 129                 goto done;
 130         }
 131
 132         switch ( op->oq_bind.rb_method ) {
 133         case LDAP_AUTH_SIMPLE:
 134                 rs->sr_err = access_allowed( op, e,
 135                         password, NULL, ACL_AUTH, NULL );
 136                 if ( ! rs->sr_err ) {
 137                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 138                         goto done;
 139                 }
 140
 141                 if ( (a = attr_find( e->e_attrs, password )) == NULL ) {
 142                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 143                         goto done;
 144                 }
 145
 146                 if ( slap_passwd_check( op->o_conn,
 147                         a, &op->oq_bind.rb_cred, &rs->sr_text ) != 0 )
 148                 {
 149                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 150                         goto done;
 151                 }
 152
 153                 rs->sr_err = 0;
 154                 break;
 155
 156 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 157         case LDAP_AUTH_KRBV41:
 158                 if ( krbv4_ldap_auth( op->o_bd, &op->oq_bind.rb_cred, &ad )
 159                         != LDAP_SUCCESS )
 160                 {
 161                         rs->sr_err = LDAP_INVALID_CREDENTIALS,
 162                         goto done;
 163                 }
 164
 165                 rs->sr_err = access_allowed( op, e,
 166                         krbattr, NULL, ACL_AUTH, NULL );
 167                 if ( ! rs->sr_err ) {
 168                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS,
 169                         goto done;
 170                 }
 171
 172                 krbval.bv_len = sprintf( krbname, "%s%s%s@%s", ad.pname,
 173                         *ad.pinst ? "." : "", ad.pinst, ad.prealm );
 174
 175                 if ( (a = attr_find( e->e_attrs, krbattr )) == NULL ) {
 176                         /*
 177                          * no krbname values present: check against DN
 178                          */
 179                         if ( strcasecmp( op->o_req_dn.bv_val, krbname ) == 0 ) {
 180                                 rs->sr_err = 0;
 181                                 break;
 182                         }
 183                         rs->sr_err = LDAP_INAPPROPRIATE_AUTH,
 184                         goto done;
 185
 186                 } else {        /* look for krbname match */
 187                         krbval.bv_val = krbname;
 188
 189                         if ( value_find( a->a_desc, a->a_vals, &krbval ) != 0 ) {
 190                                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 191                                 goto done;
 192                         }
 193                 }
 194                 rs->sr_err = 0;
 195                 break;
 196 #endif
 197
 198         default:
 199                 assert( 0 ); /* should not be unreachable */
 200                 rs->sr_err = LDAP_STRONG_AUTH_NOT_SUPPORTED;
 201                 rs->sr_text = "authentication method not supported";
 202         }
 203
 204 done:
 205         /* free entry and reader lock */
 206         if( e != NULL ) {
 207                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
 208         }
 209
 210         LOCK_ID_FREE(bdb->bi_dbenv, locker);
 211
 212         if ( rs->sr_err ) {
 213                 send_ldap_result( op, rs );
 214                 if ( rs->sr_ref ) {
 215                         ber_bvarray_free( rs->sr_ref );
 216                         rs->sr_ref = NULL;
 217                 }
 218         }
 219         /* front end will send result on success (rs->sr_err==0) */
 220         return rs->sr_err;
 221 }