git.sur5r.net Git - openldap/blob - servers/slapd/back-ldbm/bind.c

   1 /* bind.c - ldbm backend bind and unbind routines */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11
  12 #include <ac/krb.h>
  13 #include <ac/socket.h>
  14 #include <ac/string.h>
  15 #include <ac/unistd.h>
  16
  17 #include "slap.h"
  18 #include "back-ldbm.h"
  19 #include "proto-back-ldbm.h"
  20
  21 int
  22 ldbm_back_bind(
  23     Operation           *op,
  24     SlapReply           *rs )
  25 {
  26         struct ldbminfo *li = (struct ldbminfo *) op->o_bd->be_private;
  27         Entry           *e;
  28         Attribute       *a;
  29         int             rc;
  30         Entry           *matched;
  31 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
  32         char            krbname[MAX_K_NAME_SZ + 1];
  33         AttributeDescription *krbattr = slap_schema.si_ad_krbName;
  34         AUTH_DAT        ad;
  35 #endif
  36
  37         AttributeDescription *password = slap_schema.si_ad_userPassword;
  38
  39 #ifdef NEW_LOGGING
  40         LDAP_LOG( BACK_LDBM, ENTRY,
  41                 "ldbm_back_bind: dn: %s.\n", op->o_req_dn.bv_val, 0, 0 );
  42 #else
  43         Debug(LDAP_DEBUG_ARGS, "==> ldbm_back_bind: dn: %s\n", op->o_req_dn.bv_val, 0, 0);
  44 #endif
  45
  46         if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
  47                 ber_dupbv( &op->oq_bind.rb_edn, be_root_dn( op->o_bd ) );
  48                 /* front end will send result */
  49                 return LDAP_SUCCESS;
  50         }
  51
  52         /* grab giant lock for reading */
  53         ldap_pvt_thread_rdwr_rlock(&li->li_giant_rwlock);
  54
  55         /* get entry with reader lock */
  56         if ( (e = dn2entry_r( op->o_bd, &op->o_req_ndn, &matched )) == NULL ) {
  57                 if( matched != NULL ) {
  58                         rs->sr_matched = ch_strdup( matched->e_dn );
  59
  60                         rs->sr_ref = is_entry_referral( matched )
  61                                 ? get_entry_referrals( op, matched )
  62                                 : NULL;
  63
  64                         cache_return_entry_r( &li->li_cache, matched );
  65
  66                 } else {
  67                         rs->sr_ref = referral_rewrite( default_referral,
  68                                 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
  69                 }
  70
  71                 ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
  72
  73                 /* allow noauth binds */
  74                 rc = 1;
  75                 if ( rs->sr_ref != NULL ) {
  76                         rs->sr_err = LDAP_REFERRAL;
  77                 } else {
  78                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
  79                 }
  80                 send_ldap_result( op, rs );
  81
  82                 if ( rs->sr_ref ) ber_bvarray_free( rs->sr_ref );
  83                 if ( rs->sr_matched ) free( (char *)rs->sr_matched );
  84                 rs->sr_ref = NULL;
  85                 rs->sr_matched = NULL;
  86                 return rs->sr_err;
  87         }
  88
  89         ber_dupbv( &op->oq_bind.rb_edn, &e->e_name );
  90
  91         /* check for deleted */
  92 #ifdef LDBM_SUBENTRIES
  93         if ( is_entry_subentry( e ) ) {
  94                 /* entry is an subentry, don't allow bind */
  95 #ifdef NEW_LOGGING
  96                 LDAP_LOG ( OPERATION, DETAIL1,
  97                                 "bdb_bind: entry is subentry\n", 0, 0, 0 );
  98 #else
  99                 Debug( LDAP_DEBUG_TRACE,
 100                                 "entry is subentry\n", 0, 0, 0 );
 101 #endif
 102                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 103                 send_ldap_result( op, rs );
 104                 rc = LDAP_INVALID_CREDENTIALS;
 105                 goto return_results;
 106         }
 107 #endif
 108
 109         if ( is_entry_alias( e ) ) {
 110                 /* entry is an alias, don't allow bind */
 111 #ifdef NEW_LOGGING
 112                 LDAP_LOG( BACK_LDBM, INFO,
 113                         "ldbm_back_bind: entry (%s) is an alias.\n", e->e_name.bv_val, 0, 0 );
 114 #else
 115                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0,
 116                     0, 0 );
 117 #endif
 118
 119
 120                 send_ldap_error( op, rs, LDAP_ALIAS_PROBLEM,
 121                     "entry is alias" );
 122
 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                         rs->sr_err = LDAP_REFERRAL;
 142                         rs->sr_matched = e->e_name.bv_val;
 143
 144                 } else {
 145                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 146                 }
 147                 send_ldap_result( op, rs );
 148
 149                 ber_bvarray_free( rs->sr_ref );
 150                 rs->sr_matched = NULL;
 151                 rs->sr_ref = NULL;
 152                 rc = rs->sr_err;
 153                 goto return_results;
 154         }
 155
 156         switch ( op->oq_bind.rb_method ) {
 157         case LDAP_AUTH_SIMPLE:
 158                 if ( ! access_allowed( op, e,
 159                         password, NULL, ACL_AUTH, NULL ) )
 160                 {
 161                         send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS, NULL );
 162                         rc = LDAP_INSUFFICIENT_ACCESS;
 163                         goto return_results;
 164                 }
 165
 166                 if ( (a = attr_find( e->e_attrs, password )) == NULL ) {
 167                         send_ldap_error( op, rs, LDAP_INAPPROPRIATE_AUTH, NULL );
 168
 169                         /* stop front end from sending result */
 170                         rc = LDAP_INAPPROPRIATE_AUTH;
 171                         goto return_results;
 172                 }
 173
 174                 if ( slap_passwd_check( op->o_conn, a, &op->oq_bind.rb_cred, &rs->sr_text ) != 0 ) {
 175                         send_ldap_error( op, rs, LDAP_INVALID_CREDENTIALS, NULL );
 176                         /* stop front end from sending result */
 177                         rc = LDAP_INVALID_CREDENTIALS;
 178                         goto return_results;
 179                 }
 180
 181                 rc = 0;
 182                 break;
 183
 184 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 185         case LDAP_AUTH_KRBV41:
 186                 if ( krbv4_ldap_auth( op->o_bd, &op->oq_bind.rb_cred, &ad ) != LDAP_SUCCESS ) {
 187                         send_ldap_error( op, rs, LDAP_INVALID_CREDENTIALS, NULL );
 188                         rc = LDAP_INVALID_CREDENTIALS;
 189                         goto return_results;
 190                 }
 191
 192                 if ( ! access_allowed( op, e,
 193                         krbattr, NULL, ACL_AUTH, NULL ) )
 194                 {
 195                         send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
 196                                 NULL );
 197                         rc = LDAP_INSUFFICIENT_ACCESS;
 198                         goto return_results;
 199                 }
 200
 201                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 202                     : "", ad.pinst, ad.prealm );
 203
 204                 if ( (a = attr_find( e->e_attrs, krbattr )) == NULL ) {
 205                         /*
 206                          * no krbname values present:  check against DN
 207                          */
 208                         if ( strcasecmp( op->o_req_dn.bv_val, krbname ) == 0 ) {
 209                                 rc = 0;
 210                                 break;
 211                         }
 212                         send_ldap_error( op, rs, LDAP_INAPPROPRIATE_AUTH, NULL );
 213                         rc = LDAP_INAPPROPRIATE_AUTH;
 214                         goto return_results;
 215
 216                 } else {        /* look for krbname match */
 217                         struct berval   krbval;
 218
 219                         krbval.bv_val = krbname;
 220                         krbval.bv_len = strlen( krbname );
 221
 222                         if ( value_find( a->a_desc, a->a_vals, &krbval ) != 0 ) {
 223                                 send_ldap_error( op, rs,
 224                                     LDAP_INVALID_CREDENTIALS, NULL );
 225                                 rc = LDAP_INVALID_CREDENTIALS;
 226                                 goto return_results;
 227                         }
 228                 }
 229                 rc = 0;
 230                 break;
 231
 232         case LDAP_AUTH_KRBV42:
 233                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
 234                         "Kerberos bind step 2 not supported" );
 235                 /* stop front end from sending result */
 236                 rc = LDAP_UNWILLING_TO_PERFORM;
 237                 goto return_results;
 238 #endif
 239
 240         default:
 241                 send_ldap_error( op, rs, LDAP_STRONG_AUTH_NOT_SUPPORTED,
 242                     "authentication method not supported" );
 243                 rc = LDAP_STRONG_AUTH_NOT_SUPPORTED;
 244                 goto return_results;
 245         }
 246
 247 return_results:;
 248         /* free entry and reader lock */
 249         cache_return_entry_r( &li->li_cache, e );
 250         ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
 251
 252         /* front end will send result on success (rc==0) */
 253         return( rc );
 254 }
 255