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 #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 #ifdef NEW_LOGGING
  47         LDAP_LOG ( OPERATION, ARGS,
  48                 "==> bdb_bind: dn: %s\n", op->o_req_dn.bv_val, 0, 0 );
  49 #else
  50         Debug( LDAP_DEBUG_ARGS,
  51                 "==> bdb_bind: dn: %s\n", op->o_req_dn.bv_val, 0, 0);
  52 #endif
  53
  54         /* allow noauth binds */
  55         if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op )) {
  56                 ber_dupbv( &op->oq_bind.rb_edn, be_root_dn( op->o_bd ) );
  57                 /* front end will send result */
  58                 return LDAP_SUCCESS;
  59         }
  60
  61         rs->sr_err = LOCK_ID(bdb->bi_dbenv, &locker);
  62         switch(rs->sr_err) {
  63         case 0:
  64                 break;
  65         default:
  66                 rs->sr_text = "internal error";
  67                 send_ldap_result( op, rs );
  68                 return rs->sr_err;
  69         }
  70
  71 dn2entry_retry:
  72         /* get entry with reader lock */
  73         rs->sr_err = bdb_dn2entry( op, NULL, &op->o_req_ndn, &ei, 1,
  74                 locker, &lock );
  75
  76         switch(rs->sr_err) {
  77         case DB_NOTFOUND:
  78         case 0:
  79                 break;
  80         case LDAP_BUSY:
  81                 send_ldap_error( op, rs, LDAP_BUSY, "ldap_server_busy" );
  82                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
  83                 return LDAP_BUSY;
  84         case DB_LOCK_DEADLOCK:
  85         case DB_LOCK_NOTGRANTED:
  86                 goto dn2entry_retry;
  87         default:
  88                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
  89                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
  90                 return rs->sr_err;
  91         }
  92
  93         e = ei->bei_e;
  94         if ( rs->sr_err == DB_NOTFOUND ) {
  95                 if( e != NULL ) {
  96                         rs->sr_ref = is_entry_referral( e )
  97                                 ? get_entry_referrals( op, e )
  98                                 : NULL;
  99                         if (rs->sr_ref) {
 100                                 rs->sr_matched = ch_strdup( e->e_name.bv_val );
 101                                 rs->sr_flags |= REP_MATCHED_MUSTBEFREED;
 102                         }
 103
 104                         bdb_cache_return_entry_r( bdb->bi_dbenv,
 105                                 &bdb->bi_cache, e, &lock );
 106                         e = NULL;
 107                 } else {
 108                         rs->sr_ref = referral_rewrite( default_referral,
 109                                 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 110                 }
 111
 112                 if ( rs->sr_ref != NULL ) {
 113                         rs->sr_err = LDAP_REFERRAL;
 114                         send_ldap_result( op, rs );
 115                         ber_bvarray_free( rs->sr_ref );
 116                         rs->sr_ref = NULL;
 117                 } else {
 118                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 119                         send_ldap_result( op, rs );
 120                 }
 121
 122                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
 123
 124                 return rs->sr_err;
 125         }
 126
 127         ber_dupbv( &op->oq_bind.rb_edn, &e->e_name );
 128
 129         /* check for deleted */
 130 #ifdef BDB_SUBENTRIES
 131         if ( is_entry_subentry( e ) ) {
 132                 /* entry is an subentry, don't allow bind */
 133 #ifdef NEW_LOGGING
 134                 LDAP_LOG ( OPERATION, DETAIL1,
 135                         "bdb_bind: entry is subentry\n", 0, 0, 0 );
 136 #else
 137                 Debug( LDAP_DEBUG_TRACE, "entry is subentry\n", 0,
 138                         0, 0 );
 139 #endif
 140
 141                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 142                 goto done;
 143         }
 144 #endif
 145
 146 #ifdef BDB_ALIASES
 147         if ( is_entry_alias( e ) ) {
 148                 /* entry is an alias, don't allow bind */
 149 #ifdef NEW_LOGGING
 150                 LDAP_LOG ( OPERATION, DETAIL1,
 151                         "bdb_bind: entry is alias\n", 0, 0, 0 );
 152 #else
 153                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0, 0, 0 );
 154 #endif
 155
 156 #if 1
 157                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 158 #else
 159                 rs->sr_err = LDAP_ALIAS_PROBLEM;
 160                 rs->sr_text = "entry is alias";
 161 #endif
 162                 goto done;
 163         }
 164 #endif
 165
 166         if ( is_entry_referral( e ) ) {
 167                 /* entry is a referral, don't allow bind */
 168                 rs->sr_ref = get_entry_referrals( op, e );
 169
 170 #ifdef NEW_LOGGING
 171                 LDAP_LOG ( OPERATION, DETAIL1,
 172                         "bdb_bind: entry is referral\n", 0, 0, 0 );
 173 #else
 174                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 175                         0, 0 );
 176 #endif
 177
 178                 if( rs->sr_ref != NULL ) {
 179                         rs->sr_err = LDAP_REFERRAL;
 180                         rs->sr_matched = ch_strdup( e->e_name.bv_val );
 181                         rs->sr_flags |= REP_MATCHED_MUSTBEFREED;
 182                 } else {
 183                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 184                 }
 185                 goto done;
 186         }
 187
 188         switch ( op->oq_bind.rb_method ) {
 189         case LDAP_AUTH_SIMPLE:
 190                 rs->sr_err = access_allowed( op, e,
 191                         password, NULL, ACL_AUTH, NULL );
 192                 if ( ! rs->sr_err ) {
 193 #if 1
 194                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 195 #else
 196                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 197 #endif
 198                         goto done;
 199                 }
 200
 201                 if ( (a = attr_find( e->e_attrs, password )) == NULL ) {
 202 #if 1
 203                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 204 #else
 205                         rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
 206 #endif
 207                         goto done;
 208                 }
 209
 210                 if ( slap_passwd_check( op->o_conn,
 211                         a, &op->oq_bind.rb_cred, &rs->sr_text ) != 0 )
 212                 {
 213                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 214                         goto done;
 215                 }
 216
 217                 rs->sr_err = 0;
 218                 break;
 219
 220 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 221         case LDAP_AUTH_KRBV41:
 222                 if ( krbv4_ldap_auth( op->o_bd, &op->oq_bind.rb_cred, &ad )
 223                         != LDAP_SUCCESS )
 224                 {
 225                         rs->sr_err = LDAP_INVALID_CREDENTIALS,
 226                         goto done;
 227                 }
 228
 229                 rs->sr_err = access_allowed( op, e,
 230                         krbattr, NULL, ACL_AUTH, NULL );
 231                 if ( ! rs->sr_err ) {
 232                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS,
 233                         goto done;
 234                 }
 235
 236                 krbval.bv_len = sprintf( krbname, "%s%s%s@%s", ad.pname,
 237                         *ad.pinst ? "." : "", ad.pinst, ad.prealm );
 238
 239                 if ( (a = attr_find( e->e_attrs, krbattr )) == NULL ) {
 240                         /*
 241                          * no krbname values present: check against DN
 242                          */
 243                         if ( strcasecmp( op->o_req_dn.bv_val, krbname ) == 0 ) {
 244                                 rs->sr_err = 0;
 245                                 break;
 246                         }
 247                         rs->sr_err = LDAP_INAPPROPRIATE_AUTH,
 248                         goto done;
 249
 250                 } else {        /* look for krbname match */
 251                         krbval.bv_val = krbname;
 252
 253                         if ( value_find( a->a_desc, a->a_vals, &krbval ) != 0 ) {
 254                                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 255                                 goto done;
 256                         }
 257                 }
 258                 rs->sr_err = 0;
 259                 break;
 260 #endif
 261
 262         default:
 263                 assert( 0 ); /* should not be unreachable */
 264                 rs->sr_err = LDAP_STRONG_AUTH_NOT_SUPPORTED;
 265                 rs->sr_text = "authentication method not supported";
 266         }
 267
 268 done:
 269         /* free entry and reader lock */
 270         if( e != NULL ) {
 271                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
 272         }
 273
 274         LOCK_ID_FREE(bdb->bi_dbenv, locker);
 275
 276         if ( rs->sr_err ) {
 277                 send_ldap_result( op, rs );
 278                 if ( rs->sr_ref ) {
 279                         ber_bvarray_free( rs->sr_ref );
 280                         rs->sr_ref = NULL;
 281                 }
 282         }
 283         /* front end will send result on success (rs->sr_err==0) */
 284         return rs->sr_err;
 285 }