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 "ldap_pvt.h"
  33 #include "slap.h"
  34 #ifdef LDAP_SLAPI
  35 #include "slapi/slapi.h"
  36 #endif
  37
  38 static int compare_entry(
  39         Operation *op,
  40         Entry *e,
  41         AttributeAssertion *ava );
  42
  43 int
  44 do_compare(
  45     Operation   *op,
  46     SlapReply   *rs )
  47 {
  48         struct berval dn = BER_BVNULL;
  49         struct berval desc = BER_BVNULL;
  50         struct berval value = BER_BVNULL;
  51         AttributeAssertion ava = { NULL, BER_BVNULL };
  52
  53         ava.aa_desc = NULL;
  54
  55 #ifdef NEW_LOGGING
  56         LDAP_LOG( OPERATION, ENTRY, "do_compare: conn %d\n", op->o_connid, 0, 0 );
  57 #else
  58         Debug( LDAP_DEBUG_TRACE, "do_compare\n", 0, 0, 0 );
  59 #endif
  60         /*
  61          * Parse the compare request.  It looks like this:
  62          *
  63          *      CompareRequest := [APPLICATION 14] SEQUENCE {
  64          *              entry   DistinguishedName,
  65          *              ava     SEQUENCE {
  66          *                      type    AttributeType,
  67          *                      value   AttributeValue
  68          *              }
  69          *      }
  70          */
  71
  72         if ( ber_scanf( op->o_ber, "{m" /*}*/, &dn ) == LBER_ERROR ) {
  73 #ifdef NEW_LOGGING
  74                 LDAP_LOG( OPERATION, ERR,
  75                         "do_compare: conn %d  ber_scanf failed\n", op->o_connid, 0, 0 );
  76 #else
  77                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  78 #endif
  79                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
  80                 return SLAPD_DISCONNECT;
  81         }
  82
  83         if ( ber_scanf( op->o_ber, "{mm}", &desc, &value ) == LBER_ERROR ) {
  84 #ifdef NEW_LOGGING
  85                 LDAP_LOG( OPERATION, ERR,
  86                         "do_compare: conn %d  get ava failed\n", op->o_connid, 0, 0 );
  87 #else
  88                 Debug( LDAP_DEBUG_ANY, "do_compare: get ava failed\n", 0, 0, 0 );
  89 #endif
  90                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
  91                 return SLAPD_DISCONNECT;
  92         }
  93
  94         if ( ber_scanf( op->o_ber, /*{*/ "}" ) == LBER_ERROR ) {
  95 #ifdef NEW_LOGGING
  96                 LDAP_LOG( OPERATION, ERR,
  97                         "do_compare: conn %d  ber_scanf failed\n", op->o_connid, 0, 0 );
  98 #else
  99                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
 100 #endif
 101                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
 102                 return SLAPD_DISCONNECT;
 103         }
 104
 105         if( get_ctrls( op, rs, 1 ) != LDAP_SUCCESS ) {
 106 #ifdef NEW_LOGGING
 107                 LDAP_LOG( OPERATION, INFO,
 108                         "do_compare: conn %d  get_ctrls failed\n", op->o_connid, 0, 0 );
 109 #else
 110                 Debug( LDAP_DEBUG_ANY, "do_compare: get_ctrls failed\n", 0, 0, 0 );
 111 #endif
 112                 goto cleanup;
 113         }
 114
 115         rs->sr_err = dnPrettyNormal( NULL, &dn, &op->o_req_dn, &op->o_req_ndn,
 116                 op->o_tmpmemctx );
 117         if( rs->sr_err != LDAP_SUCCESS ) {
 118 #ifdef NEW_LOGGING
 119                 LDAP_LOG( OPERATION, INFO,
 120                         "do_compare: conn %d  invalid dn (%s)\n",
 121                         op->o_connid, dn.bv_val, 0 );
 122 #else
 123                 Debug( LDAP_DEBUG_ANY,
 124                         "do_compare: invalid dn (%s)\n", dn.bv_val, 0, 0 );
 125 #endif
 126                 send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid DN" );
 127                 goto cleanup;
 128         }
 129
 130         rs->sr_err = slap_bv2ad( &desc, &ava.aa_desc, &rs->sr_text );
 131         if( rs->sr_err != LDAP_SUCCESS ) {
 132                 send_ldap_result( op, rs );
 133                 goto cleanup;
 134         }
 135
 136         rs->sr_err = asserted_value_validate_normalize( ava.aa_desc,
 137                 ava.aa_desc->ad_type->sat_equality,
 138                 SLAP_MR_EQUALITY|SLAP_MR_VALUE_OF_ASSERTION_SYNTAX,
 139                 &value, &ava.aa_value, &rs->sr_text, op->o_tmpmemctx );
 140         if( rs->sr_err != LDAP_SUCCESS ) {
 141                 send_ldap_result( op, rs );
 142                 goto cleanup;
 143         }
 144
 145         op->orc_ava = &ava;
 146
 147         op->o_bd = frontendDB;
 148         rs->sr_err = frontendDB->be_compare( op, rs );
 149
 150 cleanup:;
 151         op->o_tmpfree( op->o_req_dn.bv_val, op->o_tmpmemctx );
 152         op->o_tmpfree( op->o_req_ndn.bv_val, op->o_tmpmemctx );
 153         if ( ava.aa_value.bv_val ) {
 154                 op->o_tmpfree( ava.aa_value.bv_val, op->o_tmpmemctx );
 155         }
 156
 157         return rs->sr_err;
 158 }
 159
 160 int
 161 fe_op_compare( Operation *op, SlapReply *rs )
 162 {
 163         Entry *entry = NULL;
 164         int manageDSAit;
 165         AttributeAssertion ava = *op->orc_ava;
 166
 167         if( strcasecmp( op->o_req_ndn.bv_val, LDAP_ROOT_DSE ) == 0 ) {
 168 #ifdef NEW_LOGGING
 169                 LDAP_LOG( OPERATION, ARGS,
 170                         "do_compare: dn (%s) attr(%s) value (%s)\n",
 171                         op->o_req_dn.bv_val,
 172                         ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 173 #else
 174                 Debug( LDAP_DEBUG_ARGS,
 175                         "do_compare: dn (%s) attr (%s) value (%s)\n",
 176                         op->o_req_dn.bv_val,
 177                         ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 178 #endif
 179
 180                 Statslog( LDAP_DEBUG_STATS,
 181                         "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 182                         op->o_connid, op->o_opid, op->o_req_dn.bv_val,
 183                         ava.aa_desc->ad_cname.bv_val, 0 );
 184
 185                 if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
 186                         send_ldap_result( op, rs );
 187                         goto cleanup;
 188                 }
 189
 190                 rs->sr_err = root_dse_info( op->o_conn, &entry, &rs->sr_text );
 191                 if( rs->sr_err != LDAP_SUCCESS ) {
 192                         send_ldap_result( op, rs );
 193                         goto cleanup;
 194                 }
 195
 196         } else if ( bvmatch( &op->o_req_ndn, &frontendDB->be_schemandn ) ) {
 197 #ifdef NEW_LOGGING
 198                 LDAP_LOG( OPERATION, ARGS,
 199                         "do_compare: dn (%s) attr(%s) value (%s)\n",
 200                         op->o_req_dn.bv_val,
 201                         ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 202 #else
 203                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 204                         op->o_req_dn.bv_val,
 205                         ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 206 #endif
 207
 208                 Statslog( LDAP_DEBUG_STATS,
 209                         "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 210                         op->o_connid, op->o_opid, op->o_req_dn.bv_val,
 211                         ava.aa_desc->ad_cname.bv_val, 0 );
 212
 213                 if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
 214                         send_ldap_result( op, rs );
 215                         rs->sr_err = 0;
 216                         goto cleanup;
 217                 }
 218
 219                 rs->sr_err = schema_info( &entry, &rs->sr_text );
 220                 if( rs->sr_err != LDAP_SUCCESS ) {
 221                         send_ldap_result( op, rs );
 222                         rs->sr_err = 0;
 223                         goto cleanup;
 224                 }
 225         }
 226
 227         if( entry ) {
 228                 rs->sr_err = compare_entry( op, entry, &ava );
 229                 entry_free( entry );
 230
 231                 send_ldap_result( op, rs );
 232
 233                 if( rs->sr_err == LDAP_COMPARE_TRUE ||
 234                         rs->sr_err == LDAP_COMPARE_FALSE )
 235                 {
 236                         rs->sr_err = LDAP_SUCCESS;
 237                 }
 238
 239                 goto cleanup;
 240         }
 241
 242         manageDSAit = get_manageDSAit( op );
 243
 244         /*
 245          * We could be serving multiple database backends.  Select the
 246          * appropriate one, or send a referral to our "referral server"
 247          * if we don't hold it.
 248          */
 249         op->o_bd = select_backend( &op->o_req_ndn, manageDSAit, 0 );
 250         if ( op->o_bd == NULL ) {
 251                 rs->sr_ref = referral_rewrite( default_referral,
 252                         NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 253
 254                 rs->sr_err = LDAP_REFERRAL;
 255                 if (!rs->sr_ref) rs->sr_ref = default_referral;
 256                 send_ldap_result( op, rs );
 257
 258                 if (rs->sr_ref != default_referral) ber_bvarray_free( rs->sr_ref );
 259                 rs->sr_err = 0;
 260                 goto cleanup;
 261         }
 262
 263         /* check restrictions */
 264         if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
 265                 send_ldap_result( op, rs );
 266                 goto cleanup;
 267         }
 268
 269         /* check for referrals */
 270         if( backend_check_referrals( op, rs ) != LDAP_SUCCESS ) {
 271                 goto cleanup;
 272         }
 273
 274 #ifdef NEW_LOGGING
 275         LDAP_LOG( OPERATION, ARGS,
 276                 "do_compare: dn (%s) attr(%s) value (%s)\n",
 277                 op->o_req_dn.bv_val,
 278                 ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 279 #else
 280         Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 281             op->o_req_dn.bv_val,
 282                 ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 283 #endif
 284
 285         Statslog( LDAP_DEBUG_STATS, "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 286             op->o_connid, op->o_opid, op->o_req_dn.bv_val,
 287                 ava.aa_desc->ad_cname.bv_val, 0 );
 288
 289 #if defined( LDAP_SLAPI )
 290 #define pb      op->o_pb
 291         if ( pb ) {
 292                 slapi_int_pblock_set_operation( pb, op );
 293                 slapi_pblock_set( pb, SLAPI_COMPARE_TARGET, (void *)op->o_req_dn.bv_val );
 294                 slapi_pblock_set( pb, SLAPI_MANAGEDSAIT, (void *)manageDSAit );
 295                 slapi_pblock_set( pb, SLAPI_COMPARE_TYPE, (void *)ava.aa_desc->ad_cname.bv_val );
 296                 slapi_pblock_set( pb, SLAPI_COMPARE_VALUE, (void *)&ava.aa_value );
 297
 298                 rs->sr_err = slapi_int_call_plugins( op->o_bd,
 299                         SLAPI_PLUGIN_PRE_COMPARE_FN, pb );
 300                 if ( rs->sr_err < 0 ) {
 301                         /*
 302                          * A preoperation plugin failure will abort the
 303                          * entire operation.
 304                          */
 305 #ifdef NEW_LOGGING
 306                         LDAP_LOG( OPERATION, INFO,
 307                                 "do_compare: compare preoperation plugin failed\n",
 308                                 0, 0, 0);
 309 #else
 310                         Debug(LDAP_DEBUG_TRACE,
 311                                 "do_compare: compare preoperation plugin failed\n",
 312                                 0, 0, 0);
 313 #endif
 314                         if ( ( slapi_pblock_get( op->o_pb, SLAPI_RESULT_CODE,
 315                                 (void *)&rs->sr_err ) != 0 ) || rs->sr_err == LDAP_SUCCESS )
 316                         {
 317                                 rs->sr_err = LDAP_OTHER;
 318                         }
 319                         goto cleanup;
 320                 }
 321         }
 322 #endif /* defined( LDAP_SLAPI ) */
 323
 324         op->orc_ava = &ava;
 325         if ( ava.aa_desc == slap_schema.si_ad_hasSubordinates
 326                         && op->o_bd->be_has_subordinates )
 327         {
 328                 int     rc, hasSubordinates = LDAP_SUCCESS;
 329
 330                 rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL,
 331                                 0, &entry );
 332                 if ( rc == 0 && entry ) {
 333                         rc = op->o_bd->be_has_subordinates( op, entry,
 334                                         &hasSubordinates );
 335                         be_entry_release_r( op, entry );
 336                 }
 337
 338                 if ( rc == 0 ) {
 339                         int     asserted;
 340
 341                         asserted = bvmatch( &ava.aa_value, &slap_true_bv )
 342                                 ? LDAP_COMPARE_TRUE : LDAP_COMPARE_FALSE;
 343                         if ( hasSubordinates == asserted ) {
 344                                 rs->sr_err = LDAP_COMPARE_TRUE;
 345                         } else {
 346                                 rs->sr_err = LDAP_COMPARE_FALSE;
 347                         }
 348                 }
 349                 send_ldap_result( op, rs );
 350
 351                 if ( rs->sr_err == LDAP_COMPARE_TRUE ||
 352                                 rs->sr_err == LDAP_COMPARE_FALSE )
 353                 {
 354                         rs->sr_err = LDAP_SUCCESS;
 355                 }
 356
 357         } else if ( op->o_bd->be_compare ) {
 358                 op->o_bd->be_compare( op, rs );
 359
 360         } else {
 361                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
 362                         "operation not supported within namingContext" );
 363         }
 364
 365 #if defined( LDAP_SLAPI )
 366         if ( pb != NULL && slapi_int_call_plugins( op->o_bd,
 367                 SLAPI_PLUGIN_POST_COMPARE_FN, pb ) < 0 )
 368         {
 369 #ifdef NEW_LOGGING
 370                 LDAP_LOG( OPERATION, INFO,
 371                         "do_compare: compare postoperation plugins failed\n", 0, 0, 0 );
 372 #else
 373                 Debug(LDAP_DEBUG_TRACE,
 374                         "do_compare: compare postoperation plugins failed\n", 0, 0, 0 );
 375 #endif
 376         }
 377 #endif /* defined( LDAP_SLAPI ) */
 378
 379 cleanup:;
 380         return rs->sr_err;
 381 }
 382
 383 static int compare_entry(
 384         Operation *op,
 385         Entry *e,
 386         AttributeAssertion *ava )
 387 {
 388         int rc = LDAP_NO_SUCH_ATTRIBUTE;
 389         Attribute *a;
 390
 391         if ( ! access_allowed( op, e,
 392                 ava->aa_desc, &ava->aa_value, ACL_COMPARE, NULL ) )
 393         {
 394                 return LDAP_INSUFFICIENT_ACCESS;
 395         }
 396
 397         for(a = attrs_find( e->e_attrs, ava->aa_desc );
 398                 a != NULL;
 399                 a = attrs_find( a->a_next, ava->aa_desc ))
 400         {
 401                 rc = LDAP_COMPARE_FALSE;
 402
 403                 if ( value_find_ex( ava->aa_desc,
 404                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
 405                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
 406                         a->a_nvals,
 407                         &ava->aa_value, op->o_tmpmemctx ) == 0 )
 408                 {
 409                         rc = LDAP_COMPARE_TRUE;
 410                         break;
 411                 }
 412         }
 413
 414         return rc;
 415 }