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->bi_dbenv,
  92                                 &bdb->bi_cache, e, &lock );
  93                         e = NULL;
  94                 }
  95
  96                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
  97                 send_ldap_result( op, rs );
  98
  99                 LOCK_ID_FREE(bdb->bi_dbenv, locker);
 100
 101                 return rs->sr_err;
 102         }
 103
 104         ber_dupbv( &op->oq_bind.rb_edn, &e->e_name );
 105
 106         /* check for deleted */
 107         if ( is_entry_subentry( e ) ) {
 108                 /* entry is an subentry, don't allow bind */
 109                 Debug( LDAP_DEBUG_TRACE, "entry is subentry\n", 0,
 110                         0, 0 );
 111                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 112                 goto done;
 113         }
 114
 115         if ( is_entry_alias( e ) ) {
 116                 /* entry is an alias, don't allow bind */
 117                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0, 0, 0 );
 118                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 119                 goto done;
 120         }
 121
 122         if ( is_entry_referral( e ) ) {
 123                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 124                         0, 0 );
 125                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 126                 goto done;
 127         }
 128
 129         switch ( op->oq_bind.rb_method ) {
 130         case LDAP_AUTH_SIMPLE:
 131                 a = attr_find( e->e_attrs, password );
 132                 if ( a == NULL ) {
 133                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 134                         goto done;
 135                 }
 136
 137                 if ( slap_passwd_check( op, e, a, &op->oq_bind.rb_cred,
 138                                         &rs->sr_text ) != 0 )
 139                 {
 140                         /* failure; stop front end from sending result */
 141                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 142                         goto done;
 143                 }
 144
 145                 rs->sr_err = 0;
 146                 break;
 147
 148 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 149         case LDAP_AUTH_KRBV41:
 150                 if ( krbv4_ldap_auth( op->o_bd, &op->oq_bind.rb_cred, &ad )
 151                         != LDAP_SUCCESS )
 152                 {
 153                         rs->sr_err = LDAP_INVALID_CREDENTIALS,
 154                         goto done;
 155                 }
 156
 157                 rs->sr_err = access_allowed( op, e,
 158                         krbattr, NULL, ACL_AUTH, NULL );
 159                 if ( ! rs->sr_err ) {
 160                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS,
 161                         goto done;
 162                 }
 163
 164                 krbval.bv_len = sprintf( krbname, "%s%s%s@%s", ad.pname,
 165                         *ad.pinst ? "." : "", ad.pinst, ad.prealm );
 166
 167                 if ( (a = attr_find( e->e_attrs, krbattr )) == NULL ) {
 168                         /*
 169                          * no krbname values present: check against DN
 170                          */
 171                         if ( strcasecmp( op->o_req_dn.bv_val, krbname ) == 0 ) {
 172                                 rs->sr_err = 0;
 173                                 break;
 174                         }
 175                         rs->sr_err = LDAP_INAPPROPRIATE_AUTH,
 176                         goto done;
 177
 178                 } else {        /* look for krbname match */
 179                         krbval.bv_val = krbname;
 180
 181                         if ( value_find( a->a_desc, a->a_vals, &krbval ) != 0 ) {
 182                                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 183                                 goto done;
 184                         }
 185                 }
 186                 rs->sr_err = 0;
 187                 break;
 188 #endif
 189
 190         default:
 191                 assert( 0 ); /* should not be unreachable */
 192                 rs->sr_err = LDAP_STRONG_AUTH_NOT_SUPPORTED;
 193                 rs->sr_text = "authentication method not supported";
 194         }
 195
 196 done:
 197         /* free entry and reader lock */
 198         if( e != NULL ) {
 199                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
 200         }
 201
 202         LOCK_ID_FREE(bdb->bi_dbenv, locker);
 203
 204         if ( rs->sr_err ) {
 205                 send_ldap_result( op, rs );
 206                 if ( rs->sr_ref ) {
 207                         ber_bvarray_free( rs->sr_ref );
 208                         rs->sr_ref = NULL;
 209                 }
 210         }
 211         /* front end will send result on success (rs->sr_err==0) */
 212         return rs->sr_err;
 213 }