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 2000-2004 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                 "==> bdb_bind: dn: %s\n", op->o_req_dn.bv_val, 0, 0);
  47
  48         /* allow noauth binds */
  49         if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op )) {
  50                 ber_dupbv( &op->oq_bind.rb_edn, be_root_dn( op->o_bd ) );
  51                 /* front end will send result */
  52                 return LDAP_SUCCESS;
  53         }
  54
  55         rs->sr_err = LOCK_ID(bdb->bi_dbenv, &locker);
  56         switch(rs->sr_err) {
  57         case 0:
  58                 break;
  59         default:
  60                 rs->sr_text = "internal error";
  61                 send_ldap_result( op, rs );
  62                 return rs->sr_err;
  63         }
  64
  65 dn2entry_retry:
  66         /* get entry with reader lock */
  67         rs->sr_err = bdb_dn2entry( op, NULL, &op->o_req_ndn, &ei, 1,
  68                 locker, &lock );
  69
  70         switch(rs->sr_err) {
  71         case DB_NOTFOUND:
  72         case 0:
  73                 break;
  74         case LDAP_BUSY:
  75                 send_ldap_error( op, rs, LDAP_BUSY, "ldap_server_busy" );
  76                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
  77                 return LDAP_BUSY;
  78         case DB_LOCK_DEADLOCK:
  79         case DB_LOCK_NOTGRANTED:
  80                 goto dn2entry_retry;
  81         default:
  82                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
  83                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
  84                 return rs->sr_err;
  85         }
  86
  87         e = ei->bei_e;
  88         if ( rs->sr_err == DB_NOTFOUND ) {
  89                 if( e != NULL ) {
  90                         bdb_cache_return_entry_r( bdb->bi_dbenv,
  91                                 &bdb->bi_cache, e, &lock );
  92                         e = NULL;
  93                 }
  94
  95                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
  96                 send_ldap_result( op, rs );
  97
  98                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
  99
 100                 return rs->sr_err;
 101         }
 102
 103         ber_dupbv( &op->oq_bind.rb_edn, &e->e_name );
 104
 105         /* check for deleted */
 106 #ifdef BDB_SUBENTRIES
 107         if ( is_entry_subentry( e ) ) {
 108                 /* entry is an subentry, don't allow bind */
 109                 Debug( LDAP_DEBUG_TRACE, "entry is subentry\n", 0,
 110                         0, 0 );
 111                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 112                 goto done;
 113         }
 114 #endif
 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                 rs->sr_err = access_allowed( op, e,
 133                         password, NULL, ACL_AUTH, NULL );
 134                 if ( ! rs->sr_err ) {
 135                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 136                         goto done;
 137                 }
 138
 139                 if ( (a = attr_find( e->e_attrs, password )) == NULL ) {
 140                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 141                         goto done;
 142                 }
 143
 144                 if ( slap_passwd_check( op->o_conn,
 145                         a, &op->oq_bind.rb_cred, &rs->sr_text ) != 0 )
 146                 {
 147                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 148                         goto done;
 149                 }
 150
 151                 rs->sr_err = 0;
 152                 break;
 153
 154 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 155         case LDAP_AUTH_KRBV41:
 156                 if ( krbv4_ldap_auth( op->o_bd, &op->oq_bind.rb_cred, &ad )
 157                         != LDAP_SUCCESS )
 158                 {
 159                         rs->sr_err = LDAP_INVALID_CREDENTIALS,
 160                         goto done;
 161                 }
 162
 163                 rs->sr_err = access_allowed( op, e,
 164                         krbattr, NULL, ACL_AUTH, NULL );
 165                 if ( ! rs->sr_err ) {
 166                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS,
 167                         goto done;
 168                 }
 169
 170                 krbval.bv_len = sprintf( krbname, "%s%s%s@%s", ad.pname,
 171                         *ad.pinst ? "." : "", ad.pinst, ad.prealm );
 172
 173                 if ( (a = attr_find( e->e_attrs, krbattr )) == NULL ) {
 174                         /*
 175                          * no krbname values present: check against DN
 176                          */
 177                         if ( strcasecmp( op->o_req_dn.bv_val, krbname ) == 0 ) {
 178                                 rs->sr_err = 0;
 179                                 break;
 180                         }
 181                         rs->sr_err = LDAP_INAPPROPRIATE_AUTH,
 182                         goto done;
 183
 184                 } else {        /* look for krbname match */
 185                         krbval.bv_val = krbname;
 186
 187                         if ( value_find( a->a_desc, a->a_vals, &krbval ) != 0 ) {
 188                                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 189                                 goto done;
 190                         }
 191                 }
 192                 rs->sr_err = 0;
 193                 break;
 194 #endif
 195
 196         default:
 197                 assert( 0 ); /* should not be unreachable */
 198                 rs->sr_err = LDAP_STRONG_AUTH_NOT_SUPPORTED;
 199                 rs->sr_text = "authentication method not supported";
 200         }
 201
 202 done:
 203         /* free entry and reader lock */
 204         if( e != NULL ) {
 205                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
 206         }
 207
 208         LOCK_ID_FREE(bdb->bi_dbenv, locker);
 209
 210         if ( rs->sr_err ) {
 211                 send_ldap_result( op, rs );
 212                 if ( rs->sr_ref ) {
 213                         ber_bvarray_free( rs->sr_ref );
 214                         rs->sr_ref = NULL;
 215                 }
 216         }
 217         /* front end will send result on success (rs->sr_err==0) */
 218         return rs->sr_err;
 219 }