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 #ifdef LDAP_SYNCREPL
  85                 return rs->sr_err;
  86 #else
  87                 return( rc );
  88 #endif
  89         }
  90
  91         ber_dupbv( &op->oq_bind.rb_edn, &e->e_name );
  92
  93         /* check for deleted */
  94 #ifdef LDBM_SUBENTRIES
  95         if ( is_entry_subentry( e ) ) {
  96                 /* entry is an subentry, don't allow bind */
  97 #ifdef NEW_LOGGING
  98                 LDAP_LOG ( OPERATION, DETAIL1,
  99                                 "bdb_bind: entry is subentry\n", 0, 0, 0 );
 100 #else
 101                 Debug( LDAP_DEBUG_TRACE,
 102                                 "entry is subentry\n", 0, 0, 0 );
 103 #endif
 104                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
 105                 send_ldap_result( op, rs );
 106                 goto return_results;
 107         }
 108 #endif
 109
 110         if ( is_entry_alias( e ) ) {
 111                 /* entry is an alias, don't allow bind */
 112 #ifdef NEW_LOGGING
 113                 LDAP_LOG( BACK_LDBM, INFO,
 114                         "ldbm_back_bind: entry (%s) is an alias.\n", e->e_name.bv_val, 0, 0 );
 115 #else
 116                 Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0,
 117                     0, 0 );
 118 #endif
 119
 120
 121                 send_ldap_error( op, rs, LDAP_ALIAS_PROBLEM,
 122                     "entry is alias" );
 123
 124 #ifdef LDAP_SYNCREPL
 125                 rc = LDAP_ALIAS_PROBLEM;
 126 #else
 127                 rc = 1;
 128 #endif
 129                 goto return_results;
 130         }
 131
 132         if ( is_entry_referral( e ) ) {
 133                 /* entry is a referral, don't allow bind */
 134                 rs->sr_ref = get_entry_referrals( op, e );
 135
 136 #ifdef NEW_LOGGING
 137                 LDAP_LOG( BACK_LDBM, INFO,
 138                            "ldbm_back_bind: entry(%s) is a referral.\n", e->e_dn, 0, 0 );
 139 #else
 140                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 141                     0, 0 );
 142 #endif
 143
 144
 145                 if( rs->sr_ref != NULL ) {
 146                         rs->sr_err = LDAP_REFERRAL;
 147                         rs->sr_matched = e->e_name.bv_val;
 148
 149                 } else {
 150                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 151                 }
 152                 send_ldap_result( op, rs );
 153
 154                 ber_bvarray_free( rs->sr_ref );
 155
 156 #ifdef LDAP_SYNCREPL
 157                 rc = rs->sr_err;
 158 #else
 159                 rc = 1;
 160 #endif
 161                 goto return_results;
 162         }
 163
 164         switch ( op->oq_bind.rb_method ) {
 165         case LDAP_AUTH_SIMPLE:
 166                 if ( ! access_allowed( op, e,
 167                         password, NULL, ACL_AUTH, NULL ) )
 168                 {
 169                         send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS, NULL );
 170 #ifdef LDAP_SYNCREPL
 171                         rc = LDAP_INSUFFICIENT_ACCESS;
 172 #else
 173                         rc = 1;
 174 #endif
 175                         goto return_results;
 176                 }
 177
 178                 if ( (a = attr_find( e->e_attrs, password )) == NULL ) {
 179                         send_ldap_error( op, rs, LDAP_INAPPROPRIATE_AUTH, NULL );
 180
 181                         /* stop front end from sending result */
 182 #ifdef LDAP_SYNCREPL
 183                         rc = LDAP_INAPPROPRIATE_AUTH;
 184 #else
 185                         rc = 1;
 186 #endif
 187                         goto return_results;
 188                 }
 189
 190                 if ( slap_passwd_check( op->o_conn, a, &op->oq_bind.rb_cred, &rs->sr_text ) != 0 ) {
 191                         send_ldap_error( op, rs, LDAP_INVALID_CREDENTIALS, NULL );
 192                         /* stop front end from sending result */
 193 #ifdef LDAP_SYNCREPL
 194                         rc = LDAP_INVALID_CREDENTIALS;
 195 #else
 196                         rc = 1;
 197 #endif
 198                         goto return_results;
 199                 }
 200
 201                 rc = 0;
 202                 break;
 203
 204 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 205         case LDAP_AUTH_KRBV41:
 206                 if ( krbv4_ldap_auth( op->o_bd, &op->oq_bind.rb_cred, &ad ) != LDAP_SUCCESS ) {
 207                         send_ldap_error( op, rs, LDAP_INVALID_CREDENTIALS, NULL );
 208 #ifdef LDAP_SYNCREPL
 209                         rc = LDAP_INVALID_CREDENTIALS;
 210 #else
 211                         rc = 1;
 212 #endif
 213                         goto return_results;
 214                 }
 215
 216                 if ( ! access_allowed( op, e,
 217                         krbattr, NULL, ACL_AUTH, NULL ) )
 218                 {
 219                         send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
 220                                 NULL );
 221 #ifdef LDAP_SYNCREPL
 222                         rc = LDAP_INSUFFICIENT_ACCESS;
 223 #else
 224                         rc = 1;
 225 #endif
 226                         goto return_results;
 227                 }
 228
 229                 sprintf( krbname, "%s%s%s@%s", ad.pname, *ad.pinst ? "."
 230                     : "", ad.pinst, ad.prealm );
 231
 232                 if ( (a = attr_find( e->e_attrs, krbattr )) == NULL ) {
 233                         /*
 234                          * no krbname values present:  check against DN
 235                          */
 236                         if ( strcasecmp( op->o_req_dn.bv_val, krbname ) == 0 ) {
 237                                 rc = 0;
 238                                 break;
 239                         }
 240                         send_ldap_error( op, rs, LDAP_INAPPROPRIATE_AUTH, NULL );
 241 #ifdef LDAP_SYNCREPL
 242                         rc = LDAP_INAPPROPRIATE_AUTH;
 243 #else
 244                         rc = 1;
 245 #endif
 246                         goto return_results;
 247
 248                 } else {        /* look for krbname match */
 249                         struct berval   krbval;
 250
 251                         krbval.bv_val = krbname;
 252                         krbval.bv_len = strlen( krbname );
 253
 254                         if ( value_find( a->a_desc, a->a_vals, &krbval ) != 0 ) {
 255                                 send_ldap_error( op, rs,
 256                                     LDAP_INVALID_CREDENTIALS, NULL );
 257 #ifdef LDAP_SYNCREPL
 258                                 rc = LDAP_INVALID_CREDENTIALS;
 259 #else
 260                                 rc = 1;
 261 #endif
 262                                 goto return_results;
 263                         }
 264                 }
 265                 rc = 0;
 266                 break;
 267
 268         case LDAP_AUTH_KRBV42:
 269                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
 270                         "Kerberos bind step 2 not supported" );
 271                 /* stop front end from sending result */
 272                 rc = LDAP_UNWILLING_TO_PERFORM;
 273                 goto return_results;
 274 #endif
 275
 276         default:
 277                 send_ldap_error( op, rs, LDAP_STRONG_AUTH_NOT_SUPPORTED,
 278                     "authentication method not supported" );
 279 #ifdef LDAP_SYNCREPL
 280                 rc = LDAP_STRONG_AUTH_NOT_SUPPORTED;
 281 #else
 282                 rc = 1;
 283 #endif
 284                 goto return_results;
 285         }
 286
 287 return_results:;
 288         /* free entry and reader lock */
 289         cache_return_entry_r( &li->li_cache, e );
 290         ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
 291
 292         /* front end will send result on success (rc==0) */
 293         return( rc );
 294 }
 295