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 2000-2007 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                 "==> " LDAP_XSTRING(bdb_bind) ": dn: %s\n",
  47                 op->o_req_dn.bv_val, 0, 0);
  48
  49         /* allow noauth binds */
  50         if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op )) {
  51                 ber_dupbv( &op->oq_bind.rb_edn, be_root_dn( op->o_bd ) );
  52                 /* front end will send result */
  53                 return LDAP_SUCCESS;
  54         }
  55
  56         rs->sr_err = LOCK_ID(bdb->bi_dbenv, &locker);
  57         switch(rs->sr_err) {
  58         case 0:
  59                 break;
  60         default:
  61                 rs->sr_text = "internal error";
  62                 send_ldap_result( op, rs );
  63                 return rs->sr_err;
  64         }
  65
  66 dn2entry_retry:
  67         /* get entry with reader lock */
  68         rs->sr_err = bdb_dn2entry( op, NULL, &op->o_req_ndn, &ei, 1,
  69                 locker, &lock );
  70
  71         switch(rs->sr_err) {
  72         case DB_NOTFOUND:
  73         case 0:
  74                 break;
  75         case LDAP_BUSY:
  76                 send_ldap_error( op, rs, LDAP_BUSY, "ldap_server_busy" );
  77                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
  78                 return LDAP_BUSY;
  79         case DB_LOCK_DEADLOCK:
  80         case DB_LOCK_NOTGRANTED:
  81                 goto dn2entry_retry;
  82         default:
  83                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
  84                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
  85                 return rs->sr_err;
  86         }
  87
  88         e = ei->bei_e;
  89         if ( rs->sr_err == DB_NOTFOUND ) {
  90                 if( e != NULL ) {
  91                         bdb_cache_return_entry_r( bdb, 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         if ( is_entry_subentry( e ) ) {
 107                 /* entry is an subentry, don't allow bind */
 108                 Debug( LDAP_DEBUG_TRACE, "entry is subentry\n", 0,
 109                         0, 0 );
 110                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 111                 goto done;
 112         }
 113
 114         if ( is_entry_alias( e ) ) {
 115                 /* entry is an alias, don't allow bind */
 116                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0, 0, 0 );
 117                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 118                 goto done;
 119         }
 120
 121         if ( is_entry_referral( e ) ) {
 122                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 123                         0, 0 );
 124                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 125                 goto done;
 126         }
 127
 128         switch ( op->oq_bind.rb_method ) {
 129         case LDAP_AUTH_SIMPLE:
 130                 a = attr_find( e->e_attrs, password );
 131                 if ( a == NULL ) {
 132                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 133                         goto done;
 134                 }
 135
 136                 if ( slap_passwd_check( op, e, a, &op->oq_bind.rb_cred,
 137                                         &rs->sr_text ) != 0 )
 138                 {
 139                         /* failure; stop front end from sending result */
 140                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 141                         goto done;
 142                 }
 143
 144                 rs->sr_err = 0;
 145                 break;
 146
 147 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 148         case LDAP_AUTH_KRBV41:
 149                 if ( krbv4_ldap_auth( op->o_bd, &op->oq_bind.rb_cred, &ad )
 150                         != LDAP_SUCCESS )
 151                 {
 152                         rs->sr_err = LDAP_INVALID_CREDENTIALS,
 153                         goto done;
 154                 }
 155
 156                 rs->sr_err = access_allowed( op, e,
 157                         krbattr, NULL, ACL_AUTH, NULL );
 158                 if ( ! rs->sr_err ) {
 159                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS,
 160                         goto done;
 161                 }
 162
 163                 krbval.bv_len = sprintf( krbname, "%s%s%s@%s", ad.pname,
 164                         *ad.pinst ? "." : "", ad.pinst, ad.prealm );
 165
 166                 if ( (a = attr_find( e->e_attrs, krbattr )) == NULL ) {
 167                         /*
 168                          * no krbname values present: check against DN
 169                          */
 170                         if ( strcasecmp( op->o_req_dn.bv_val, krbname ) == 0 ) {
 171                                 rs->sr_err = 0;
 172                                 break;
 173                         }
 174                         rs->sr_err = LDAP_INAPPROPRIATE_AUTH,
 175                         goto done;
 176
 177                 } else {        /* look for krbname match */
 178                         krbval.bv_val = krbname;
 179
 180                         if ( value_find( a->a_desc, a->a_vals, &krbval ) != 0 ) {
 181                                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 182                                 goto done;
 183                         }
 184                 }
 185                 rs->sr_err = 0;
 186                 break;
 187 #endif
 188
 189         default:
 190                 assert( 0 ); /* should not be unreachable */
 191                 rs->sr_err = LDAP_STRONG_AUTH_NOT_SUPPORTED;
 192                 rs->sr_text = "authentication method not supported";
 193         }
 194
 195 done:
 196         /* free entry and reader lock */
 197         if( e != NULL ) {
 198                 bdb_cache_return_entry_r( bdb, e, &lock );
 199         }
 200
 201         LOCK_ID_FREE(bdb->bi_dbenv, locker);
 202
 203         if ( rs->sr_err ) {
 204                 send_ldap_result( op, rs );
 205                 if ( rs->sr_ref ) {
 206                         ber_bvarray_free( rs->sr_ref );
 207                         rs->sr_ref = NULL;
 208                 }
 209         }
 210         /* front end will send result on success (rs->sr_err==0) */
 211         return rs->sr_err;
 212 }