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 1998-2005 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
  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         Debug(LDAP_DEBUG_ARGS,
  49                 "==> ldbm_back_bind: dn: %s\n", op->o_req_dn.bv_val, 0, 0);
  50
  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         /* grab giant lock for reading */
  58         ldap_pvt_thread_rdwr_rlock(&li->li_giant_rwlock);
  59
  60         /* get entry with reader lock */
  61         if ( (e = dn2entry_r( op->o_bd, &op->o_req_ndn, &matched )) == NULL ) {
  62                 if( matched != NULL ) {
  63                         cache_return_entry_r( &li->li_cache, matched );
  64                 }
  65                 ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
  66
  67                 /* allow noauth binds */
  68                 rc = 1;
  69                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
  70                 send_ldap_result( op, rs );
  71                 return rs->sr_err;
  72         }
  73
  74         /* check for deleted */
  75 #ifdef LDBM_SUBENTRIES
  76         if ( is_entry_subentry( e ) ) {
  77                 /* entry is an subentry, don't allow bind */
  78                 Debug( LDAP_DEBUG_TRACE,
  79                                 "entry is subentry\n", 0, 0, 0 );
  80                 rc = LDAP_INVALID_CREDENTIALS;
  81                 goto return_results;
  82         }
  83 #endif
  84
  85         if ( is_entry_alias( e ) ) {
  86                 /* entry is an alias, don't allow bind */
  87                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0, 0, 0 );
  88
  89 #if 1
  90                 rc = LDAP_INVALID_CREDENTIALS;
  91 #else
  92                 rs->sr_text = "entry is alias";
  93                 rc = LDAP_ALIAS_PROBLEM;
  94 #endif
  95                 goto return_results;
  96         }
  97
  98         if ( is_entry_referral( e ) ) {
  99                 /* entry is a referral, don't allow bind */
 100                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0, 0, 0 );
 101
 102                 rc = LDAP_INVALID_CREDENTIALS;
 103                 goto return_results;
 104         }
 105
 106         switch ( op->oq_bind.rb_method ) {
 107         case LDAP_AUTH_SIMPLE:
 108                 if ( (a = attr_find( e->e_attrs, password )) == NULL ) {
 109                         /* stop front end from sending result */
 110                         rc = LDAP_INVALID_CREDENTIALS;
 111                         goto return_results;
 112                 }
 113
 114                 if ( slap_passwd_check( op, e, a, &op->oq_bind.rb_cred,
 115                                         &rs->sr_text ) != 0 )
 116                 {
 117                         /* failure; stop front end from sending result */
 118                         rc = LDAP_INVALID_CREDENTIALS;
 119                         goto return_results;
 120                 }
 121
 122                 rc = 0;
 123                 break;
 124
 125 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 126         case LDAP_AUTH_KRBV41:
 127                 if ( krbv4_ldap_auth( op->o_bd, &op->oq_bind.rb_cred, &ad )
 128                         != LDAP_SUCCESS )
 129                 {
 130                         rc = LDAP_INVALID_CREDENTIALS;
 131                         goto return_results;
 132                 }
 133
 134                 if ( ! access_allowed( op, e,
 135                         krbattr, NULL, ACL_AUTH, NULL ) )
 136                 {
 137                         rc = LDAP_INSUFFICIENT_ACCESS;
 138                         goto return_results;
 139                 }
 140
 141                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 142                     : "", ad.pinst, ad.prealm );
 143
 144                 if ( (a = attr_find( e->e_attrs, krbattr )) == NULL ) {
 145                         /*
 146                          * no krbname values present:  check against DN
 147                          */
 148                         if ( strcasecmp( op->o_req_dn.bv_val, krbname ) == 0 ) {
 149                                 rc = 0;
 150                                 break;
 151                         }
 152                         rc = LDAP_INAPPROPRIATE_AUTH;
 153                         goto return_results;
 154
 155                 } else {        /* look for krbname match */
 156                         struct berval   krbval;
 157
 158                         krbval.bv_val = krbname;
 159                         krbval.bv_len = strlen( krbname );
 160
 161                         if ( value_find( a->a_desc, a->a_vals, &krbval ) != 0 ) {
 162                                 rc = LDAP_INVALID_CREDENTIALS;
 163                                 goto return_results;
 164                         }
 165                 }
 166                 rc = 0;
 167                 break;
 168 #endif
 169
 170         default:
 171                 assert( 0 ); /* should not be reachable */
 172                 rs->sr_text = "authentication method not supported";
 173                 rc = LDAP_STRONG_AUTH_NOT_SUPPORTED;
 174                 goto return_results;
 175         }
 176
 177         ber_dupbv( &op->oq_bind.rb_edn, &e->e_name );
 178
 179 return_results:;
 180         /* free entry and reader lock */
 181         cache_return_entry_r( &li->li_cache, e );
 182         ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
 183
 184         if ( rc ) {
 185                 rs->sr_err = rc;
 186                 send_ldap_result( op, rs );
 187                 if ( rs->sr_ref ) {
 188                         ber_bvarray_free( rs->sr_ref );
 189                         rs->sr_ref = NULL;
 190                 }
 191         }
 192
 193         /* front end will send result on success (rc==0) */
 194         return( rc );
 195 }
 196