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