git.sur5r.net Git - openldap/blob - servers/slapd/compare.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2004 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  16  * All rights reserved.
  17  *
  18  * Redistribution and use in source and binary forms are permitted
  19  * provided that this notice is preserved and that due credit is given
  20  * to the University of Michigan at Ann Arbor. The name of the University
  21  * may not be used to endorse or promote products derived from this
  22  * software without specific prior written permission. This software
  23  * is provided ``as is'' without express or implied warranty.
  24  */
  25
  26 #include "portable.h"
  27
  28 #include <stdio.h>
  29 #include <ac/socket.h>
  30 #include <ac/string.h>
  31
  32 #include "slap.h"
  33 #ifdef LDAP_SLAPI
  34 #include "slapi/slapi.h"
  35 #endif
  36
  37 static int compare_entry(
  38         Operation *op,
  39         Entry *e,
  40         AttributeAssertion *ava );
  41
  42 int
  43 do_compare(
  44     Operation   *op,
  45     SlapReply   *rs )
  46 {
  47         struct berval dn = BER_BVNULL;
  48         struct berval desc = BER_BVNULL;
  49         struct berval value = BER_BVNULL;
  50         AttributeAssertion ava = { NULL, BER_BVNULL };
  51
  52         ava.aa_desc = NULL;
  53
  54         Debug( LDAP_DEBUG_TRACE, "do_compare\n", 0, 0, 0 );
  55         /*
  56          * Parse the compare request.  It looks like this:
  57          *
  58          *      CompareRequest := [APPLICATION 14] SEQUENCE {
  59          *              entry   DistinguishedName,
  60          *              ava     SEQUENCE {
  61          *                      type    AttributeType,
  62          *                      value   AttributeValue
  63          *              }
  64          *      }
  65          */
  66
  67         if ( ber_scanf( op->o_ber, "{m" /*}*/, &dn ) == LBER_ERROR ) {
  68                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  69                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
  70                 return SLAPD_DISCONNECT;
  71         }
  72
  73         if ( ber_scanf( op->o_ber, "{mm}", &desc, &value ) == LBER_ERROR ) {
  74                 Debug( LDAP_DEBUG_ANY, "do_compare: get ava failed\n", 0, 0, 0 );
  75                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
  76                 return SLAPD_DISCONNECT;
  77         }
  78
  79         if ( ber_scanf( op->o_ber, /*{*/ "}" ) == LBER_ERROR ) {
  80                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  81                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
  82                 return SLAPD_DISCONNECT;
  83         }
  84
  85         if( get_ctrls( op, rs, 1 ) != LDAP_SUCCESS ) {
  86                 Debug( LDAP_DEBUG_ANY, "do_compare: get_ctrls failed\n", 0, 0, 0 );
  87                 goto cleanup;
  88         }
  89
  90         rs->sr_err = dnPrettyNormal( NULL, &dn, &op->o_req_dn, &op->o_req_ndn,
  91                 op->o_tmpmemctx );
  92         if( rs->sr_err != LDAP_SUCCESS ) {
  93                 Debug( LDAP_DEBUG_ANY,
  94                         "do_compare: invalid dn (%s)\n", dn.bv_val, 0, 0 );
  95                 send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid DN" );
  96                 goto cleanup;
  97         }
  98
  99         rs->sr_err = slap_bv2ad( &desc, &ava.aa_desc, &rs->sr_text );
 100         if( rs->sr_err != LDAP_SUCCESS ) {
 101                 send_ldap_result( op, rs );
 102                 goto cleanup;
 103         }
 104
 105         rs->sr_err = asserted_value_validate_normalize( ava.aa_desc,
 106                 ava.aa_desc->ad_type->sat_equality,
 107                 SLAP_MR_EQUALITY|SLAP_MR_VALUE_OF_ASSERTION_SYNTAX,
 108                 &value, &ava.aa_value, &rs->sr_text, op->o_tmpmemctx );
 109         if( rs->sr_err != LDAP_SUCCESS ) {
 110                 send_ldap_result( op, rs );
 111                 goto cleanup;
 112         }
 113
 114         op->orc_ava = &ava;
 115
 116         op->o_bd = frontendDB;
 117         rs->sr_err = frontendDB->be_compare( op, rs );
 118
 119 cleanup:;
 120         op->o_tmpfree( op->o_req_dn.bv_val, op->o_tmpmemctx );
 121         op->o_tmpfree( op->o_req_ndn.bv_val, op->o_tmpmemctx );
 122         if ( ava.aa_value.bv_val ) {
 123                 op->o_tmpfree( ava.aa_value.bv_val, op->o_tmpmemctx );
 124         }
 125
 126         return rs->sr_err;
 127 }
 128
 129 int
 130 fe_op_compare( Operation *op, SlapReply *rs )
 131 {
 132         Entry *entry = NULL;
 133         int manageDSAit;
 134         AttributeAssertion ava = *op->orc_ava;
 135
 136         if( strcasecmp( op->o_req_ndn.bv_val, LDAP_ROOT_DSE ) == 0 ) {
 137                 Debug( LDAP_DEBUG_ARGS,
 138                         "do_compare: dn (%s) attr (%s) value (%s)\n",
 139                         op->o_req_dn.bv_val,
 140                         ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 141
 142                 Statslog( LDAP_DEBUG_STATS,
 143                         "%s CMP dn=\"%s\" attr=\"%s\"\n",
 144                         op->o_log_prefix, op->o_req_dn.bv_val,
 145                         ava.aa_desc->ad_cname.bv_val, 0, 0 );
 146
 147                 if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
 148                         send_ldap_result( op, rs );
 149                         goto cleanup;
 150                 }
 151
 152                 rs->sr_err = root_dse_info( op->o_conn, &entry, &rs->sr_text );
 153                 if( rs->sr_err != LDAP_SUCCESS ) {
 154                         send_ldap_result( op, rs );
 155                         goto cleanup;
 156                 }
 157
 158         } else if ( bvmatch( &op->o_req_ndn, &frontendDB->be_schemandn ) ) {
 159                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 160                         op->o_req_dn.bv_val,
 161                         ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 162
 163                 Statslog( LDAP_DEBUG_STATS,
 164                         "%s CMP dn=\"%s\" attr=\"%s\"\n",
 165                         op->o_log_prefix, op->o_req_dn.bv_val,
 166                         ava.aa_desc->ad_cname.bv_val, 0, 0 );
 167
 168                 if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
 169                         send_ldap_result( op, rs );
 170                         rs->sr_err = 0;
 171                         goto cleanup;
 172                 }
 173
 174                 rs->sr_err = schema_info( &entry, &rs->sr_text );
 175                 if( rs->sr_err != LDAP_SUCCESS ) {
 176                         send_ldap_result( op, rs );
 177                         rs->sr_err = 0;
 178                         goto cleanup;
 179                 }
 180         }
 181
 182         if( entry ) {
 183                 rs->sr_err = compare_entry( op, entry, &ava );
 184                 entry_free( entry );
 185
 186                 send_ldap_result( op, rs );
 187
 188                 if( rs->sr_err == LDAP_COMPARE_TRUE ||
 189                         rs->sr_err == LDAP_COMPARE_FALSE )
 190                 {
 191                         rs->sr_err = LDAP_SUCCESS;
 192                 }
 193
 194                 goto cleanup;
 195         }
 196
 197         manageDSAit = get_manageDSAit( op );
 198
 199         /*
 200          * We could be serving multiple database backends.  Select the
 201          * appropriate one, or send a referral to our "referral server"
 202          * if we don't hold it.
 203          */
 204         op->o_bd = select_backend( &op->o_req_ndn, manageDSAit, 0 );
 205         if ( op->o_bd == NULL ) {
 206                 rs->sr_ref = referral_rewrite( SLAPD_GLOBAL(default_referral),
 207                         NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 208
 209                 rs->sr_err = LDAP_REFERRAL;
 210                 if (!rs->sr_ref) rs->sr_ref = SLAPD_GLOBAL(default_referral);
 211                 send_ldap_result( op, rs );
 212
 213                 if (rs->sr_ref != SLAPD_GLOBAL(default_referral)) ber_bvarray_free( rs->sr_ref );
 214                 rs->sr_err = 0;
 215                 goto cleanup;
 216         }
 217
 218         /* check restrictions */
 219         if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
 220                 send_ldap_result( op, rs );
 221                 goto cleanup;
 222         }
 223
 224         /* check for referrals */
 225         if( backend_check_referrals( op, rs ) != LDAP_SUCCESS ) {
 226                 goto cleanup;
 227         }
 228
 229         Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 230             op->o_req_dn.bv_val,
 231                 ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 232
 233         Statslog( LDAP_DEBUG_STATS, "%s CMP dn=\"%s\" attr=\"%s\"\n",
 234                 op->o_log_prefix, op->o_req_dn.bv_val,
 235                 ava.aa_desc->ad_cname.bv_val, 0, 0 );
 236
 237 #if defined( LDAP_SLAPI )
 238 #define pb      op->o_pb
 239         if ( pb ) {
 240                 slapi_int_pblock_set_operation( pb, op );
 241                 slapi_pblock_set( pb, SLAPI_COMPARE_TARGET, (void *)op->o_req_dn.bv_val );
 242                 slapi_pblock_set( pb, SLAPI_MANAGEDSAIT, (void *)manageDSAit );
 243                 slapi_pblock_set( pb, SLAPI_COMPARE_TYPE, (void *)ava.aa_desc->ad_cname.bv_val );
 244                 slapi_pblock_set( pb, SLAPI_COMPARE_VALUE, (void *)&ava.aa_value );
 245
 246                 rs->sr_err = slapi_int_call_plugins( op->o_bd,
 247                         SLAPI_PLUGIN_PRE_COMPARE_FN, pb );
 248                 if ( rs->sr_err < 0 ) {
 249                         /*
 250                          * A preoperation plugin failure will abort the
 251                          * entire operation.
 252                          */
 253                         Debug(LDAP_DEBUG_TRACE,
 254                                 "do_compare: compare preoperation plugin failed\n",
 255                                 0, 0, 0);
 256                         if ( ( slapi_pblock_get( op->o_pb, SLAPI_RESULT_CODE,
 257                                 (void *)&rs->sr_err ) != 0 ) || rs->sr_err == LDAP_SUCCESS )
 258                         {
 259                                 rs->sr_err = LDAP_OTHER;
 260                         }
 261                         goto cleanup;
 262                 }
 263         }
 264 #endif /* defined( LDAP_SLAPI ) */
 265
 266         op->orc_ava = &ava;
 267         if ( ava.aa_desc == slap_schema.si_ad_entryDN ) {
 268                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
 269                         "entryDN compare not supported" );
 270
 271         } else if ( ava.aa_desc == slap_schema.si_ad_subschemaSubentry ) {
 272                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
 273                         "subschemaSubentry compare not supported" );
 274
 275         } else if ( ava.aa_desc == slap_schema.si_ad_hasSubordinates
 276                 && op->o_bd->be_has_subordinates )
 277         {
 278                 int     rc, hasSubordinates = LDAP_SUCCESS;
 279
 280                 rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &entry );
 281                 if ( rc == 0 && entry ) {
 282                         rc = op->o_bd->be_has_subordinates( op, entry,
 283                                 &hasSubordinates );
 284                         be_entry_release_r( op, entry );
 285                 }
 286
 287                 if ( rc == 0 ) {
 288                         int     asserted;
 289
 290                         asserted = bvmatch( &ava.aa_value, &slap_true_bv )
 291                                 ? LDAP_COMPARE_TRUE : LDAP_COMPARE_FALSE;
 292                         if ( hasSubordinates == asserted ) {
 293                                 rs->sr_err = LDAP_COMPARE_TRUE;
 294                         } else {
 295                                 rs->sr_err = LDAP_COMPARE_FALSE;
 296                         }
 297                 }
 298                 send_ldap_result( op, rs );
 299
 300                 if( rc == 0 ) rs->sr_err = LDAP_SUCCESS;
 301
 302         } else if ( op->o_bd->be_compare ) {
 303                 op->o_bd->be_compare( op, rs );
 304
 305         } else {
 306                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
 307                         "operation not supported within namingContext" );
 308         }
 309
 310 #if defined( LDAP_SLAPI )
 311         if ( pb != NULL && slapi_int_call_plugins( op->o_bd,
 312                 SLAPI_PLUGIN_POST_COMPARE_FN, pb ) < 0 )
 313         {
 314                 Debug(LDAP_DEBUG_TRACE,
 315                         "do_compare: compare postoperation plugins failed\n", 0, 0, 0 );
 316         }
 317 #endif /* defined( LDAP_SLAPI ) */
 318
 319 cleanup:;
 320         return rs->sr_err;
 321 }
 322
 323 static int compare_entry(
 324         Operation *op,
 325         Entry *e,
 326         AttributeAssertion *ava )
 327 {
 328         int rc;
 329         Attribute *a;
 330
 331         if ( ! access_allowed( op, e,
 332                 ava->aa_desc, &ava->aa_value, ACL_COMPARE, NULL ) )
 333         {
 334                 return LDAP_INSUFFICIENT_ACCESS;
 335         }
 336
 337         a = attrs_find( e->e_attrs, ava->aa_desc );
 338         if( a == NULL ) return LDAP_NO_SUCH_ATTRIBUTE;
 339
 340         rc = LDAP_COMPARE_FALSE;
 341         for(a = attrs_find( e->e_attrs, ava->aa_desc );
 342                 a != NULL;
 343                 a = attrs_find( a->a_next, ava->aa_desc ))
 344         {
 345                 if (( ava->aa_desc != a->a_desc ) && ! access_allowed( op,
 346                         e, a->a_desc, &ava->aa_value, ACL_COMPARE, NULL ) )
 347                 {
 348                         rc = LDAP_INSUFFICIENT_ACCESS;
 349                         break;
 350                 }
 351
 352                 if ( value_find_ex( ava->aa_desc,
 353                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
 354                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
 355                         a->a_nvals,
 356                         &ava->aa_value, op->o_tmpmemctx ) == 0 )
 357                 {
 358                         rc = LDAP_COMPARE_TRUE;
 359                         break;
 360                 }
 361         }
 362
 363         return rc;
 364 }