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, "==> ldbm_back_bind: dn: %s\n", op->o_req_dn.bv_val, 0, 0);
  53 #endif
  54
  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         /* grab giant lock for reading */
  62         ldap_pvt_thread_rdwr_rlock(&li->li_giant_rwlock);
  63
  64         /* get entry with reader lock */
  65         if ( (e = dn2entry_r( op->o_bd, &op->o_req_ndn, &matched )) == NULL ) {
  66                 if( matched != NULL ) {
  67                         rs->sr_matched = ch_strdup( matched->e_dn );
  68                         rs->sr_flags |= REP_MATCHED_MUSTBEFREED;
  69
  70                         rs->sr_ref = is_entry_referral( matched )
  71                                 ? get_entry_referrals( op, matched )
  72                                 : NULL;
  73
  74                         cache_return_entry_r( &li->li_cache, matched );
  75
  76                 } else {
  77                         rs->sr_ref = referral_rewrite( default_referral,
  78                                 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
  79                 }
  80
  81                 ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
  82
  83                 /* allow noauth binds */
  84                 rc = 1;
  85                 if ( rs->sr_ref != NULL ) {
  86                         rs->sr_err = LDAP_REFERRAL;
  87                 } else {
  88                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
  89                 }
  90                 send_ldap_result( op, rs );
  91
  92                 if ( rs->sr_ref ) ber_bvarray_free( rs->sr_ref );
  93                 rs->sr_ref = NULL;
  94                 return rs->sr_err;
  95         }
  96
  97         /* check for deleted */
  98 #ifdef LDBM_SUBENTRIES
  99         if ( is_entry_subentry( e ) ) {
 100                 /* entry is an subentry, don't allow bind */
 101 #ifdef NEW_LOGGING
 102                 LDAP_LOG ( OPERATION, DETAIL1,
 103                                 "bdb_bind: entry is subentry\n", 0, 0, 0 );
 104 #else
 105                 Debug( LDAP_DEBUG_TRACE,
 106                                 "entry is subentry\n", 0, 0, 0 );
 107 #endif
 108                 rc = LDAP_INVALID_CREDENTIALS;
 109                 goto return_results;
 110         }
 111 #endif
 112
 113         if ( is_entry_alias( e ) ) {
 114                 /* entry is an alias, don't allow bind */
 115 #ifdef NEW_LOGGING
 116                 LDAP_LOG( BACK_LDBM, INFO,
 117                         "ldbm_back_bind: entry (%s) is an alias.\n", e->e_name.bv_val, 0, 0 );
 118 #else
 119                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0,
 120                     0, 0 );
 121 #endif
 122                 rs->sr_text = "entry is alias";
 123                 rc = LDAP_ALIAS_PROBLEM;
 124                 goto return_results;
 125         }
 126
 127         if ( is_entry_referral( e ) ) {
 128                 /* entry is a referral, don't allow bind */
 129                 rs->sr_ref = get_entry_referrals( op, e );
 130
 131 #ifdef NEW_LOGGING
 132                 LDAP_LOG( BACK_LDBM, INFO,
 133                            "ldbm_back_bind: entry(%s) is a referral.\n", e->e_dn, 0, 0 );
 134 #else
 135                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 136                     0, 0 );
 137 #endif
 138
 139
 140                 if( rs->sr_ref != NULL ) {
 141                         rc = LDAP_REFERRAL;
 142                         rs->sr_matched = ch_strdup( e->e_name.bv_val );
 143                         rs->sr_flags |= REP_MATCHED_MUSTBEFREED;
 144
 145                 } else {
 146                         rc = LDAP_INVALID_CREDENTIALS;
 147                 }
 148                 goto return_results;
 149         }
 150
 151         switch ( op->oq_bind.rb_method ) {
 152         case LDAP_AUTH_SIMPLE:
 153                 if ( ! access_allowed( op, e,
 154                         password, NULL, ACL_AUTH, NULL ) )
 155                 {
 156                         rc = LDAP_INSUFFICIENT_ACCESS;
 157                         goto return_results;
 158                 }
 159
 160                 if ( (a = attr_find( e->e_attrs, password )) == NULL ) {
 161                         /* stop front end from sending result */
 162                         rc = LDAP_INAPPROPRIATE_AUTH;
 163                         goto return_results;
 164                 }
 165
 166                 if ( slap_passwd_check( op->o_conn, a, &op->oq_bind.rb_cred, &rs->sr_text ) != 0 ) {
 167                         /* stop front end from sending result */
 168                         rc = LDAP_INVALID_CREDENTIALS;
 169                         goto return_results;
 170                 }
 171
 172                 rc = 0;
 173                 break;
 174
 175 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 176         case LDAP_AUTH_KRBV41:
 177                 if ( krbv4_ldap_auth( op->o_bd, &op->oq_bind.rb_cred, &ad ) != LDAP_SUCCESS ) {
 178                         rc = LDAP_INVALID_CREDENTIALS;
 179                         goto return_results;
 180                 }
 181
 182                 if ( ! access_allowed( op, e,
 183                         krbattr, NULL, ACL_AUTH, NULL ) )
 184                 {
 185                         rc = LDAP_INSUFFICIENT_ACCESS;
 186                         goto return_results;
 187                 }
 188
 189                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 190                     : "", ad.pinst, ad.prealm );
 191
 192                 if ( (a = attr_find( e->e_attrs, krbattr )) == NULL ) {
 193                         /*
 194                          * no krbname values present:  check against DN
 195                          */
 196                         if ( strcasecmp( op->o_req_dn.bv_val, krbname ) == 0 ) {
 197                                 rc = 0;
 198                                 break;
 199                         }
 200                         rc = LDAP_INAPPROPRIATE_AUTH;
 201                         goto return_results;
 202
 203                 } else {        /* look for krbname match */
 204                         struct berval   krbval;
 205
 206                         krbval.bv_val = krbname;
 207                         krbval.bv_len = strlen( krbname );
 208
 209                         if ( value_find( a->a_desc, a->a_vals, &krbval ) != 0 ) {
 210                                 rc = LDAP_INVALID_CREDENTIALS;
 211                                 goto return_results;
 212                         }
 213                 }
 214                 rc = 0;
 215                 break;
 216
 217         case LDAP_AUTH_KRBV42:
 218                 rs->sr_text = "Kerberos bind step 2 not supported";
 219                 /* stop front end from sending result */
 220                 rc = LDAP_UNWILLING_TO_PERFORM;
 221                 goto return_results;
 222 #endif
 223
 224         default:
 225                 rs->sr_text = "authentication method not supported";
 226                 rc = LDAP_STRONG_AUTH_NOT_SUPPORTED;
 227                 goto return_results;
 228         }
 229
 230         ber_dupbv( &op->oq_bind.rb_edn, &e->e_name );
 231
 232 return_results:;
 233         /* free entry and reader lock */
 234         cache_return_entry_r( &li->li_cache, e );
 235         ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
 236
 237         if ( rc ) {
 238                 rs->sr_err = rc;
 239                 send_ldap_result( op, rs );
 240                 if ( rs->sr_ref ) {
 241                         ber_bvarray_free( rs->sr_ref );
 242                         rs->sr_ref = NULL;
 243                 }
 244         }
 245
 246         /* front end will send result on success (rc==0) */
 247         return( rc );
 248 }
 249