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, "==> bdb_bind: dn: %s\n", op->o_req_dn.bv_val, 0, 0 );
  48 #else
  49         Debug( LDAP_DEBUG_ARGS, "==> bdb_bind: dn: %s\n", op->o_req_dn.bv_val, 0, 0);
  50 #endif
  51
  52         /* allow noauth binds */
  53         if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op )) {
  54                 ber_dupbv( &op->oq_bind.rb_edn, be_root_dn( op->o_bd ) );
  55                 /* front end will send result */
  56                 return LDAP_SUCCESS;
  57         }
  58
  59         rs->sr_err = LOCK_ID(bdb->bi_dbenv, &locker);
  60         switch(rs->sr_err) {
  61         case 0:
  62                 break;
  63         default:
  64                 rs->sr_text = "internal error";
  65                 send_ldap_result( op, rs );
  66                 return rs->sr_err;
  67         }
  68
  69 dn2entry_retry:
  70         /* get entry with reader lock */
  71         rs->sr_err = bdb_dn2entry( op, NULL, &op->o_req_ndn, &ei, 1,
  72                 locker, &lock );
  73
  74         switch(rs->sr_err) {
  75         case DB_NOTFOUND:
  76         case 0:
  77                 break;
  78         case LDAP_BUSY:
  79                 send_ldap_error( op, rs, LDAP_BUSY, "ldap_server_busy" );
  80                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
  81                 return LDAP_BUSY;
  82         case DB_LOCK_DEADLOCK:
  83         case DB_LOCK_NOTGRANTED:
  84                 goto dn2entry_retry;
  85         default:
  86                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
  87                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
  88                 return rs->sr_err;
  89         }
  90
  91         e = ei->bei_e;
  92         if ( rs->sr_err == DB_NOTFOUND ) {
  93                 if( e != NULL ) {
  94                         rs->sr_ref = is_entry_referral( e )
  95                                 ? get_entry_referrals( op, e )
  96                                 : NULL;
  97                         if (rs->sr_ref)
  98                                 rs->sr_matched = ch_strdup( e->e_name.bv_val );
  99
 100                         bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
 101                         e = NULL;
 102                 } else {
 103                         rs->sr_ref = referral_rewrite( default_referral,
 104                                 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 105                 }
 106
 107                 if ( rs->sr_ref != NULL ) {
 108                         rs->sr_err = LDAP_REFERRAL;
 109                         send_ldap_result( op, rs );
 110                         free( (char *)rs->sr_matched );
 111                         ber_bvarray_free( rs->sr_ref );
 112                         rs->sr_ref = NULL;
 113                         rs->sr_matched = NULL;
 114                 } else {
 115                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 116                         send_ldap_result( op, rs );
 117                 }
 118
 119                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
 120
 121                 return rs->sr_err;
 122         }
 123
 124         ber_dupbv( &op->oq_bind.rb_edn, &e->e_name );
 125
 126         /* check for deleted */
 127 #ifdef BDB_SUBENTRIES
 128         if ( is_entry_subentry( e ) ) {
 129                 /* entry is an subentry, don't allow bind */
 130 #ifdef NEW_LOGGING
 131                 LDAP_LOG ( OPERATION, DETAIL1,
 132                         "bdb_bind: entry is subentry\n", 0, 0, 0 );
 133 #else
 134                 Debug( LDAP_DEBUG_TRACE, "entry is subentry\n", 0,
 135                         0, 0 );
 136 #endif
 137
 138                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 139                 goto done;
 140         }
 141 #endif
 142
 143 #ifdef BDB_ALIASES
 144         if ( is_entry_alias( e ) ) {
 145                 /* entry is an alias, don't allow bind */
 146 #ifdef NEW_LOGGING
 147                 LDAP_LOG ( OPERATION, DETAIL1, "bdb_bind: entry is alias\n", 0, 0, 0 );
 148 #else
 149                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0,
 150                         0, 0 );
 151 #endif
 152
 153                 rs->sr_err = LDAP_ALIAS_PROBLEM;
 154                 rs->sr_text = "entry is alias";
 155                 goto done;
 156         }
 157 #endif
 158
 159         if ( is_entry_referral( e ) ) {
 160                 /* entry is a referral, don't allow bind */
 161                 rs->sr_ref = get_entry_referrals( op, e );
 162
 163 #ifdef NEW_LOGGING
 164                 LDAP_LOG ( OPERATION, DETAIL1,
 165                         "bdb_bind: entry is referral\n", 0, 0, 0 );
 166 #else
 167                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 168                         0, 0 );
 169 #endif
 170
 171                 if( rs->sr_ref != NULL ) {
 172                         rs->sr_err = LDAP_REFERRAL;
 173                 } else {
 174                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 175                 }
 176                 goto done;
 177         }
 178
 179         switch ( op->oq_bind.rb_method ) {
 180         case LDAP_AUTH_SIMPLE:
 181                 rs->sr_err = access_allowed( op, e,
 182                         password, NULL, ACL_AUTH, NULL );
 183                 if ( ! rs->sr_err ) {
 184                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 185                         goto done;
 186                 }
 187
 188                 if ( (a = attr_find( e->e_attrs, password )) == NULL ) {
 189                         rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
 190                         goto done;
 191                 }
 192
 193                 if ( slap_passwd_check( op->o_conn, a, &op->oq_bind.rb_cred, &rs->sr_text ) != 0 ) {
 194                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 195                         goto done;
 196                 }
 197
 198                 rs->sr_err = 0;
 199                 break;
 200
 201 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 202         case LDAP_AUTH_KRBV41:
 203                 if ( krbv4_ldap_auth( op->o_bd, &op->oq_bind.rb_cred, &ad ) != LDAP_SUCCESS ) {
 204                         rs->sr_err = LDAP_INVALID_CREDENTIALS,
 205                         goto done;
 206                 }
 207
 208                 rs->sr_err = access_allowed( op, e,
 209                         krbattr, NULL, ACL_AUTH, NULL );
 210                 if ( ! rs->sr_err ) {
 211                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS,
 212                         goto done;
 213                 }
 214
 215                 krbval.bv_len = sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 216                         : "", ad.pinst, ad.prealm );
 217
 218                 if ( (a = attr_find( e->e_attrs, krbattr )) == NULL ) {
 219                         /*
 220                          * no krbname values present: check against DN
 221                          */
 222                         if ( strcasecmp( op->o_req_dn.bv_val, krbname ) == 0 ) {
 223                                 rs->sr_err = 0;
 224                                 break;
 225                         }
 226                         rs->sr_err = LDAP_INAPPROPRIATE_AUTH,
 227                         goto done;
 228
 229                 } else {        /* look for krbname match */
 230                         krbval.bv_val = krbname;
 231
 232                         if ( value_find( a->a_desc, a->a_vals, &krbval ) != 0 ) {
 233                                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 234                                 goto done;
 235                         }
 236                 }
 237                 rs->sr_err = 0;
 238                 break;
 239
 240         case LDAP_AUTH_KRBV42:
 241                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 242                 rs->sr_text = "Kerberos bind step 2 not supported";
 243                 goto done;
 244 #endif
 245
 246         default:
 247                 rs->sr_err = LDAP_STRONG_AUTH_NOT_SUPPORTED;
 248                 rs->sr_text = "authentication method not supported";
 249         }
 250
 251 done:
 252         /* free entry and reader lock */
 253         if( e != NULL ) {
 254                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
 255         }
 256
 257         LOCK_ID_FREE(bdb->bi_dbenv, locker);
 258
 259         if ( rs->sr_err ) {
 260                 send_ldap_result( op, rs );
 261                 if ( rs->sr_ref ) {
 262                         ber_bvarray_free( rs->sr_ref );
 263                         rs->sr_ref = NULL;
 264                 }
 265         }
 266         /* front end will send result on success (rs->sr_err==0) */
 267         return rs->sr_err;
 268 }