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
  69                         rs->sr_ref = is_entry_referral( matched )
  70                                 ? get_entry_referrals( op, matched )
  71                                 : NULL;
  72
  73                         cache_return_entry_r( &li->li_cache, matched );
  74
  75                 } else {
  76                         rs->sr_ref = referral_rewrite( default_referral,
  77                                 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
  78                 }
  79
  80                 ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
  81
  82                 /* allow noauth binds */
  83                 rc = 1;
  84                 if ( rs->sr_ref != NULL ) {
  85                         rs->sr_err = LDAP_REFERRAL;
  86                 } else {
  87                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
  88                 }
  89                 send_ldap_result( op, rs );
  90
  91                 if ( rs->sr_ref ) ber_bvarray_free( rs->sr_ref );
  92                 if ( rs->sr_matched ) free( (char *)rs->sr_matched );
  93                 rs->sr_ref = NULL;
  94                 rs->sr_matched = NULL;
  95                 return rs->sr_err;
  96         }
  97
  98         ber_dupbv( &op->oq_bind.rb_edn, &e->e_name );
  99
 100         /* check for deleted */
 101 #ifdef LDBM_SUBENTRIES
 102         if ( is_entry_subentry( e ) ) {
 103                 /* entry is an subentry, don't allow bind */
 104 #ifdef NEW_LOGGING
 105                 LDAP_LOG ( OPERATION, DETAIL1,
 106                                 "bdb_bind: entry is subentry\n", 0, 0, 0 );
 107 #else
 108                 Debug( LDAP_DEBUG_TRACE,
 109                                 "entry is subentry\n", 0, 0, 0 );
 110 #endif
 111                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 112                 send_ldap_result( op, rs );
 113                 rc = LDAP_INVALID_CREDENTIALS;
 114                 goto return_results;
 115         }
 116 #endif
 117
 118         if ( is_entry_alias( e ) ) {
 119                 /* entry is an alias, don't allow bind */
 120 #ifdef NEW_LOGGING
 121                 LDAP_LOG( BACK_LDBM, INFO,
 122                         "ldbm_back_bind: entry (%s) is an alias.\n", e->e_name.bv_val, 0, 0 );
 123 #else
 124                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0,
 125                     0, 0 );
 126 #endif
 127
 128
 129                 send_ldap_error( op, rs, LDAP_ALIAS_PROBLEM,
 130                     "entry is alias" );
 131
 132                 rc = LDAP_ALIAS_PROBLEM;
 133                 goto return_results;
 134         }
 135
 136         if ( is_entry_referral( e ) ) {
 137                 /* entry is a referral, don't allow bind */
 138                 rs->sr_ref = get_entry_referrals( op, e );
 139
 140 #ifdef NEW_LOGGING
 141                 LDAP_LOG( BACK_LDBM, INFO,
 142                            "ldbm_back_bind: entry(%s) is a referral.\n", e->e_dn, 0, 0 );
 143 #else
 144                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 145                     0, 0 );
 146 #endif
 147
 148
 149                 if( rs->sr_ref != NULL ) {
 150                         rs->sr_err = LDAP_REFERRAL;
 151                         rs->sr_matched = e->e_name.bv_val;
 152
 153                 } else {
 154                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 155                 }
 156                 send_ldap_result( op, rs );
 157
 158                 ber_bvarray_free( rs->sr_ref );
 159                 rs->sr_matched = NULL;
 160                 rs->sr_ref = NULL;
 161                 rc = rs->sr_err;
 162                 goto return_results;
 163         }
 164
 165         switch ( op->oq_bind.rb_method ) {
 166         case LDAP_AUTH_SIMPLE:
 167                 if ( ! access_allowed( op, e,
 168                         password, NULL, ACL_AUTH, NULL ) )
 169                 {
 170                         send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS, NULL );
 171                         rc = LDAP_INSUFFICIENT_ACCESS;
 172                         goto return_results;
 173                 }
 174
 175                 if ( (a = attr_find( e->e_attrs, password )) == NULL ) {
 176                         send_ldap_error( op, rs, LDAP_INAPPROPRIATE_AUTH, NULL );
 177
 178                         /* stop front end from sending result */
 179                         rc = LDAP_INAPPROPRIATE_AUTH;
 180                         goto return_results;
 181                 }
 182
 183                 if ( slap_passwd_check( op->o_conn, a, &op->oq_bind.rb_cred, &rs->sr_text ) != 0 ) {
 184                         send_ldap_error( op, rs, LDAP_INVALID_CREDENTIALS, NULL );
 185                         /* stop front end from sending result */
 186                         rc = LDAP_INVALID_CREDENTIALS;
 187                         goto return_results;
 188                 }
 189
 190                 rc = 0;
 191                 break;
 192
 193 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 194         case LDAP_AUTH_KRBV41:
 195                 if ( krbv4_ldap_auth( op->o_bd, &op->oq_bind.rb_cred, &ad ) != LDAP_SUCCESS ) {
 196                         send_ldap_error( op, rs, LDAP_INVALID_CREDENTIALS, NULL );
 197                         rc = LDAP_INVALID_CREDENTIALS;
 198                         goto return_results;
 199                 }
 200
 201                 if ( ! access_allowed( op, e,
 202                         krbattr, NULL, ACL_AUTH, NULL ) )
 203                 {
 204                         send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
 205                                 NULL );
 206                         rc = LDAP_INSUFFICIENT_ACCESS;
 207                         goto return_results;
 208                 }
 209
 210                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 211                     : "", ad.pinst, ad.prealm );
 212
 213                 if ( (a = attr_find( e->e_attrs, krbattr )) == NULL ) {
 214                         /*
 215                          * no krbname values present:  check against DN
 216                          */
 217                         if ( strcasecmp( op->o_req_dn.bv_val, krbname ) == 0 ) {
 218                                 rc = 0;
 219                                 break;
 220                         }
 221                         send_ldap_error( op, rs, LDAP_INAPPROPRIATE_AUTH, NULL );
 222                         rc = LDAP_INAPPROPRIATE_AUTH;
 223                         goto return_results;
 224
 225                 } else {        /* look for krbname match */
 226                         struct berval   krbval;
 227
 228                         krbval.bv_val = krbname;
 229                         krbval.bv_len = strlen( krbname );
 230
 231                         if ( value_find( a->a_desc, a->a_vals, &krbval ) != 0 ) {
 232                                 send_ldap_error( op, rs,
 233                                     LDAP_INVALID_CREDENTIALS, NULL );
 234                                 rc = LDAP_INVALID_CREDENTIALS;
 235                                 goto return_results;
 236                         }
 237                 }
 238                 rc = 0;
 239                 break;
 240
 241         case LDAP_AUTH_KRBV42:
 242                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
 243                         "Kerberos bind step 2 not supported" );
 244                 /* stop front end from sending result */
 245                 rc = LDAP_UNWILLING_TO_PERFORM;
 246                 goto return_results;
 247 #endif
 248
 249         default:
 250                 send_ldap_error( op, rs, LDAP_STRONG_AUTH_NOT_SUPPORTED,
 251                     "authentication method not supported" );
 252                 rc = LDAP_STRONG_AUTH_NOT_SUPPORTED;
 253                 goto return_results;
 254         }
 255
 256 return_results:;
 257         /* free entry and reader lock */
 258         cache_return_entry_r( &li->li_cache, e );
 259         ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
 260
 261         /* front end will send result on success (rc==0) */
 262         return( rc );
 263 }
 264