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