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