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

   1 /* bind.c - ldbm backend bind and unbind routines */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2004 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
  21 #include <ac/krb.h>
  22 #include <ac/socket.h>
  23 #include <ac/string.h>
  24 #include <ac/unistd.h>
  25
  26 #include "slap.h"
  27 #include "back-ldbm.h"
  28 #include "proto-back-ldbm.h"
  29
  30 int
  31 ldbm_back_bind(
  32     Operation           *op,
  33     SlapReply           *rs )
  34 {
  35         struct ldbminfo *li = (struct ldbminfo *) op->o_bd->be_private;
  36         Entry           *e;
  37         Attribute       *a;
  38         int             rc;
  39         Entry           *matched;
  40 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
  41         char            krbname[MAX_K_NAME_SZ + 1];
  42         AttributeDescription *krbattr = slap_schema.si_ad_krbName;
  43         AUTH_DAT        ad;
  44 #endif
  45
  46         AttributeDescription *password = slap_schema.si_ad_userPassword;
  47
  48 #ifdef NEW_LOGGING
  49         LDAP_LOG( BACK_LDBM, ENTRY,
  50                 "ldbm_back_bind: dn: %s.\n", op->o_req_dn.bv_val, 0, 0 );
  51 #else
  52         Debug(LDAP_DEBUG_ARGS,
  53                 "==> ldbm_back_bind: dn: %s\n", op->o_req_dn.bv_val, 0, 0);
  54 #endif
  55
  56         if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
  57                 ber_dupbv( &op->oq_bind.rb_edn, be_root_dn( op->o_bd ) );
  58                 /* front end will send result */
  59                 return LDAP_SUCCESS;
  60         }
  61
  62         /* grab giant lock for reading */
  63         ldap_pvt_thread_rdwr_rlock(&li->li_giant_rwlock);
  64
  65         /* get entry with reader lock */
  66         if ( (e = dn2entry_r( op->o_bd, &op->o_req_ndn, &matched )) == NULL ) {
  67                 if( matched != NULL ) {
  68                         rs->sr_matched = ch_strdup( matched->e_dn );
  69                         rs->sr_flags |= REP_MATCHED_MUSTBEFREED;
  70
  71                         rs->sr_ref = is_entry_referral( matched )
  72                                 ? get_entry_referrals( op, matched )
  73                                 : NULL;
  74
  75                         cache_return_entry_r( &li->li_cache, matched );
  76
  77                 } else {
  78                         rs->sr_ref = referral_rewrite( default_referral,
  79                                 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
  80                 }
  81
  82                 ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
  83
  84                 /* allow noauth binds */
  85                 rc = 1;
  86                 if ( rs->sr_ref != NULL ) {
  87                         rs->sr_err = LDAP_REFERRAL;
  88                 } else {
  89                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
  90                 }
  91                 send_ldap_result( op, rs );
  92
  93                 if ( rs->sr_ref ) ber_bvarray_free( rs->sr_ref );
  94                 rs->sr_ref = NULL;
  95                 return rs->sr_err;
  96         }
  97
  98         /* check for deleted */
  99 #ifdef LDBM_SUBENTRIES
 100         if ( is_entry_subentry( e ) ) {
 101                 /* entry is an subentry, don't allow bind */
 102 #ifdef NEW_LOGGING
 103                 LDAP_LOG ( OPERATION, DETAIL1,
 104                                 "bdb_bind: entry is subentry\n", 0, 0, 0 );
 105 #else
 106                 Debug( LDAP_DEBUG_TRACE,
 107                                 "entry is subentry\n", 0, 0, 0 );
 108 #endif
 109                 rc = LDAP_INVALID_CREDENTIALS;
 110                 goto return_results;
 111         }
 112 #endif
 113
 114         if ( is_entry_alias( e ) ) {
 115                 /* entry is an alias, don't allow bind */
 116 #ifdef NEW_LOGGING
 117                 LDAP_LOG( BACK_LDBM, INFO,
 118                         "ldbm_back_bind: entry (%s) is an alias.\n",
 119                         e->e_name.bv_val, 0, 0 );
 120 #else
 121                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0, 0, 0 );
 122 #endif
 123
 124 #if 1
 125                 rc = LDAP_INVALID_CREDENTIALS;
 126 #else
 127                 rs->sr_text = "entry is alias";
 128                 rc = LDAP_ALIAS_PROBLEM;
 129 #endif
 130                 goto return_results;
 131         }
 132
 133         if ( is_entry_referral( e ) ) {
 134                 /* entry is a referral, don't allow bind */
 135                 rs->sr_ref = get_entry_referrals( op, e );
 136
 137 #ifdef NEW_LOGGING
 138                 LDAP_LOG( BACK_LDBM, INFO,
 139                            "ldbm_back_bind: entry(%s) is a referral.\n", e->e_dn, 0, 0 );
 140 #else
 141                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 142                     0, 0 );
 143 #endif
 144
 145                 if( rs->sr_ref != NULL ) {
 146                         rc = LDAP_REFERRAL;
 147                         rs->sr_matched = ch_strdup( e->e_name.bv_val );
 148                         rs->sr_flags |= REP_MATCHED_MUSTBEFREED;
 149
 150                 } else {
 151                         rc = LDAP_INVALID_CREDENTIALS;
 152                 }
 153                 goto return_results;
 154         }
 155
 156         switch ( op->oq_bind.rb_method ) {
 157         case LDAP_AUTH_SIMPLE:
 158                 if ( ! access_allowed( op, e,
 159                         password, NULL, ACL_AUTH, NULL ) )
 160                 {
 161 #if 1
 162                         rc = LDAP_INVALID_CREDENTIALS;
 163 #else
 164                         rc = LDAP_INSUFFICIENT_ACCESS;
 165 #endif
 166                         goto return_results;
 167                 }
 168
 169                 if ( (a = attr_find( e->e_attrs, password )) == NULL ) {
 170                         /* stop front end from sending result */
 171 #if 1
 172                         rc = LDAP_INVALID_CREDENTIALS;
 173 #else
 174                         rc = LDAP_INAPPROPRIATE_AUTH;
 175 #endif
 176                         goto return_results;
 177                 }
 178
 179                 if ( slap_passwd_check( op->o_conn,
 180                         a, &op->oq_bind.rb_cred, &rs->sr_text ) != 0 )
 181                 {
 182                         /* stop front end from sending result */
 183                         rc = LDAP_INVALID_CREDENTIALS;
 184                         goto return_results;
 185                 }
 186
 187                 rc = 0;
 188                 break;
 189
 190 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 191         case LDAP_AUTH_KRBV41:
 192                 if ( krbv4_ldap_auth( op->o_bd, &op->oq_bind.rb_cred, &ad )
 193                         != LDAP_SUCCESS )
 194                 {
 195                         rc = LDAP_INVALID_CREDENTIALS;
 196                         goto return_results;
 197                 }
 198
 199                 if ( ! access_allowed( op, e,
 200                         krbattr, NULL, ACL_AUTH, NULL ) )
 201                 {
 202                         rc = LDAP_INSUFFICIENT_ACCESS;
 203                         goto return_results;
 204                 }
 205
 206                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 207                     : "", ad.pinst, ad.prealm );
 208
 209                 if ( (a = attr_find( e->e_attrs, krbattr )) == NULL ) {
 210                         /*
 211                          * no krbname values present:  check against DN
 212                          */
 213                         if ( strcasecmp( op->o_req_dn.bv_val, krbname ) == 0 ) {
 214                                 rc = 0;
 215                                 break;
 216                         }
 217                         rc = LDAP_INAPPROPRIATE_AUTH;
 218                         goto return_results;
 219
 220                 } else {        /* look for krbname match */
 221                         struct berval   krbval;
 222
 223                         krbval.bv_val = krbname;
 224                         krbval.bv_len = strlen( krbname );
 225
 226                         if ( value_find( a->a_desc, a->a_vals, &krbval ) != 0 ) {
 227                                 rc = LDAP_INVALID_CREDENTIALS;
 228                                 goto return_results;
 229                         }
 230                 }
 231                 rc = 0;
 232                 break;
 233 #endif
 234
 235         default:
 236                 assert( 0 ); /* should not be reachable */
 237                 rs->sr_text = "authentication method not supported";
 238                 rc = LDAP_STRONG_AUTH_NOT_SUPPORTED;
 239                 goto return_results;
 240         }
 241
 242         ber_dupbv( &op->oq_bind.rb_edn, &e->e_name );
 243
 244 return_results:;
 245         /* free entry and reader lock */
 246         cache_return_entry_r( &li->li_cache, e );
 247         ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
 248
 249         if ( rc ) {
 250                 rs->sr_err = rc;
 251                 send_ldap_result( op, rs );
 252                 if ( rs->sr_ref ) {
 253                         ber_bvarray_free( rs->sr_ref );
 254                         rs->sr_ref = NULL;
 255                 }
 256         }
 257
 258         /* front end will send result on success (rc==0) */
 259         return( rc );
 260 }
 261