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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6 /*
   7  * Copyright (c) 1995 Regents of the University of Michigan.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms are permitted
  11  * provided that this notice is preserved and that due credit is given
  12  * to the University of Michigan at Ann Arbor. The name of the University
  13  * may not be used to endorse or promote products derived from this
  14  * software without specific prior written permission. This software
  15  * is provided ``as is'' without express or implied warranty.
  16  */
  17
  18 #include "portable.h"
  19
  20 #include <stdio.h>
  21 #include <ac/socket.h>
  22
  23 #include "ldap_pvt.h"
  24 #include "slap.h"
  25 #include "slapi.h"
  26
  27 static int compare_entry(
  28         Connection *conn,
  29         Operation *op,
  30         Entry *e,
  31         AttributeAssertion *ava );
  32
  33 int
  34 do_compare(
  35     Connection  *conn,
  36     Operation   *op
  37 )
  38 {
  39         Entry *entry = NULL;
  40         Entry *fentry = NULL;
  41         struct berval dn = { 0, NULL };
  42         struct berval pdn = { 0, NULL };
  43         struct berval ndn = { 0, NULL };
  44         struct berval desc = { 0, NULL };
  45         struct berval value = { 0, NULL };
  46         AttributeAssertion ava = { NULL, { 0, NULL } };
  47         Backend *be;
  48         int rc = LDAP_SUCCESS;
  49         const char *text = NULL;
  50         int manageDSAit;
  51
  52 #ifdef LDAP_SLAPI
  53         Slapi_PBlock *pb = op->o_pb;
  54 #endif
  55
  56         ava.aa_desc = NULL;
  57
  58 #ifdef NEW_LOGGING
  59         LDAP_LOG( OPERATION, ENTRY, "do_compare: conn %d\n", conn->c_connid, 0, 0 );
  60 #else
  61         Debug( LDAP_DEBUG_TRACE, "do_compare\n", 0, 0, 0 );
  62 #endif
  63         /*
  64          * Parse the compare request.  It looks like this:
  65          *
  66          *      CompareRequest := [APPLICATION 14] SEQUENCE {
  67          *              entry   DistinguishedName,
  68          *              ava     SEQUENCE {
  69          *                      type    AttributeType,
  70          *                      value   AttributeValue
  71          *              }
  72          *      }
  73          */
  74
  75         if ( ber_scanf( op->o_ber, "{m" /*}*/, &dn ) == LBER_ERROR ) {
  76 #ifdef NEW_LOGGING
  77                 LDAP_LOG( OPERATION, ERR,
  78                         "do_compare: conn %d  ber_scanf failed\n", conn->c_connid, 0, 0 );
  79 #else
  80                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  81 #endif
  82                 send_ldap_disconnect( conn, op,
  83                         LDAP_PROTOCOL_ERROR, "decoding error" );
  84                 return SLAPD_DISCONNECT;
  85         }
  86
  87         if ( ber_scanf( op->o_ber, "{mm}", &desc, &value ) == LBER_ERROR ) {
  88 #ifdef NEW_LOGGING
  89                 LDAP_LOG( OPERATION, ERR,
  90                         "do_compare: conn %d  get ava failed\n", conn->c_connid, 0, 0 );
  91 #else
  92                 Debug( LDAP_DEBUG_ANY, "do_compare: get ava failed\n", 0, 0, 0 );
  93 #endif
  94                 send_ldap_disconnect( conn, op,
  95                         LDAP_PROTOCOL_ERROR, "decoding error" );
  96                 rc = SLAPD_DISCONNECT;
  97                 goto cleanup;
  98         }
  99
 100         if ( ber_scanf( op->o_ber, /*{*/ "}" ) == LBER_ERROR ) {
 101 #ifdef NEW_LOGGING
 102                 LDAP_LOG( OPERATION, ERR,
 103                         "do_compare: conn %d  ber_scanf failed\n", conn->c_connid, 0, 0 );
 104 #else
 105                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
 106 #endif
 107                 send_ldap_disconnect( conn, op,
 108                         LDAP_PROTOCOL_ERROR, "decoding error" );
 109                 rc = SLAPD_DISCONNECT;
 110                 goto cleanup;
 111         }
 112
 113         if( ( rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
 114 #ifdef NEW_LOGGING
 115                 LDAP_LOG( OPERATION, INFO,
 116                         "do_compare: conn %d  get_ctrls failed\n", conn->c_connid, 0, 0 );
 117 #else
 118                 Debug( LDAP_DEBUG_ANY, "do_compare: get_ctrls failed\n", 0, 0, 0 );
 119 #endif
 120                 goto cleanup;
 121         }
 122
 123         rc = dnPrettyNormal( NULL, &dn, &pdn, &ndn );
 124         if( rc != LDAP_SUCCESS ) {
 125 #ifdef NEW_LOGGING
 126                 LDAP_LOG( OPERATION, INFO,
 127                         "do_compare: conn %d  invalid dn (%s)\n",
 128                         conn->c_connid, dn.bv_val, 0 );
 129 #else
 130                 Debug( LDAP_DEBUG_ANY,
 131                         "do_compare: invalid dn (%s)\n", dn.bv_val, 0, 0 );
 132 #endif
 133                 send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
 134                     "invalid DN", NULL, NULL );
 135                 goto cleanup;
 136         }
 137
 138         rc = slap_bv2ad( &desc, &ava.aa_desc, &text );
 139         if( rc != LDAP_SUCCESS ) {
 140                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 141                 goto cleanup;
 142         }
 143
 144         rc = value_validate_normalize( ava.aa_desc, SLAP_MR_EQUALITY,
 145                 &value, &ava.aa_value, &text );
 146         if( rc != LDAP_SUCCESS ) {
 147                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 148                 goto cleanup;
 149         }
 150
 151         if( strcasecmp( ndn.bv_val, LDAP_ROOT_DSE ) == 0 ) {
 152 #ifdef NEW_LOGGING
 153                 LDAP_LOG( OPERATION, ARGS,
 154                         "do_compare: dn (%s) attr(%s) value (%s)\n",
 155                         pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 156 #else
 157                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 158                         pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 159 #endif
 160
 161                 Statslog( LDAP_DEBUG_STATS,
 162                         "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 163                         op->o_connid, op->o_opid, pdn.bv_val,
 164                         ava.aa_desc->ad_cname.bv_val, 0 );
 165
 166                 rc = backend_check_restrictions( NULL, conn, op, NULL, &text ) ;
 167                 if( rc != LDAP_SUCCESS ) {
 168                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 169                         goto cleanup;
 170                 }
 171
 172                 rc = root_dse_info( conn, &entry, &text );
 173                 if( rc != LDAP_SUCCESS ) {
 174                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 175                         goto cleanup;
 176                 }
 177
 178                 fentry = entry;
 179
 180         } else if ( bvmatch( &ndn, &global_schemandn ) ) {
 181 #ifdef NEW_LOGGING
 182                 LDAP_LOG( OPERATION, ARGS,
 183                         "do_compare: dn (%s) attr(%s) value (%s)\n",
 184                         pdn.bv_val, ava.aa_desc->ad_cname.bv_val,
 185                         ava.aa_value.bv_val );
 186 #else
 187                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 188                         pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 189 #endif
 190
 191                 Statslog( LDAP_DEBUG_STATS,
 192                         "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 193                         op->o_connid, op->o_opid, pdn.bv_val,
 194                         ava.aa_desc->ad_cname.bv_val, 0 );
 195
 196                 rc = backend_check_restrictions( NULL, conn, op, NULL, &text ) ;
 197                 if( rc != LDAP_SUCCESS ) {
 198                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 199                         rc = 0;
 200                         goto cleanup;
 201                 }
 202
 203                 rc = schema_info( &entry, &text );
 204                 if( rc != LDAP_SUCCESS ) {
 205                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 206                         rc = 0;
 207                         goto cleanup;
 208                 }
 209                 fentry = entry;
 210         }
 211
 212         if( entry ) {
 213                 rc = compare_entry( conn, op, entry, &ava );
 214                 if( fentry) entry_free( fentry );
 215
 216                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 217
 218                 if( rc == LDAP_COMPARE_TRUE || rc == LDAP_COMPARE_FALSE ) {
 219                         rc = 0;
 220                 }
 221
 222                 goto cleanup;
 223         }
 224
 225         manageDSAit = get_manageDSAit( op );
 226
 227         /*
 228          * We could be serving multiple database backends.  Select the
 229          * appropriate one, or send a referral to our "referral server"
 230          * if we don't hold it.
 231          */
 232         if ( (be = select_backend( &ndn, manageDSAit, 0 )) == NULL ) {
 233                 BerVarray ref = referral_rewrite( default_referral,
 234                         NULL, &pdn, LDAP_SCOPE_DEFAULT );
 235
 236                 send_ldap_result( conn, op, rc = LDAP_REFERRAL,
 237                         NULL, NULL, ref ? ref : default_referral, NULL );
 238
 239                 ber_bvarray_free( ref );
 240                 rc = 0;
 241                 goto cleanup;
 242         }
 243
 244         /* check restrictions */
 245         rc = backend_check_restrictions( be, conn, op, NULL, &text ) ;
 246         if( rc != LDAP_SUCCESS ) {
 247                 send_ldap_result( conn, op, rc,
 248                         NULL, text, NULL, NULL );
 249                 goto cleanup;
 250         }
 251
 252         /* check for referrals */
 253         rc = backend_check_referrals( be, conn, op, &pdn, &ndn );
 254         if ( rc != LDAP_SUCCESS ) {
 255                 goto cleanup;
 256         }
 257
 258 #ifdef NEW_LOGGING
 259         LDAP_LOG( OPERATION, ARGS,
 260                 "do_compare: dn (%s) attr(%s) value (%s)\n",
 261                 pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 262 #else
 263         Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 264             pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 265 #endif
 266
 267         Statslog( LDAP_DEBUG_STATS, "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 268             op->o_connid, op->o_opid, pdn.bv_val,
 269                 ava.aa_desc->ad_cname.bv_val, 0 );
 270
 271
 272         /* deref suffix alias if appropriate */
 273         suffix_alias( be, &ndn );
 274
 275 #if defined( LDAP_SLAPI )
 276         slapi_x_backend_set_pb( pb, be );
 277         slapi_x_connection_set_pb( pb, conn );
 278         slapi_x_operation_set_pb( pb, op );
 279         slapi_pblock_set( pb, SLAPI_COMPARE_TARGET, (void *)dn.bv_val );
 280         slapi_pblock_set( pb, SLAPI_MANAGEDSAIT, (void *)manageDSAit );
 281         slapi_pblock_set( pb, SLAPI_COMPARE_TYPE, (void *)desc.bv_val );
 282         slapi_pblock_set( pb, SLAPI_COMPARE_VALUE, (void *)&value );
 283
 284         rc = doPluginFNs( be, SLAPI_PLUGIN_PRE_COMPARE_FN, pb );
 285         if ( rc != 0 ) {
 286                 /*
 287                  * A preoperation plugin failure will abort the
 288                  * entire operation.
 289                  */
 290 #ifdef NEW_LOGGING
 291                 LDAP_LOG( OPERATION, INFO, "do_compare: compare preoperation plugin "
 292                                 "failed\n", 0, 0, 0);
 293 #else
 294                 Debug(LDAP_DEBUG_TRACE, "do_compare: compare preoperation plugin "
 295                                 "failed.\n", 0, 0, 0);
 296 #endif
 297                 if ( slapi_pblock_get( pb, SLAPI_RESULT_CODE, (void *)&rc ) != 0)
 298                         rc = LDAP_OTHER;
 299                 goto cleanup;
 300         }
 301 #endif /* defined( LDAP_SLAPI ) */
 302
 303         if ( be->be_compare ) {
 304                 (*be->be_compare)( be, conn, op, &pdn, &ndn, &ava );
 305         } else {
 306                 send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
 307                         NULL, "operation not supported within namingContext",
 308                         NULL, NULL );
 309         }
 310
 311 #if defined( LDAP_SLAPI )
 312         if ( doPluginFNs( be, SLAPI_PLUGIN_POST_COMPARE_FN, pb ) != 0 ) {
 313 #ifdef NEW_LOGGING
 314                 LDAP_LOG( OPERATION, INFO, "do_compare: compare postoperation plugins "
 315                                 "failed\n", 0, 0, 0 );
 316 #else
 317                 Debug(LDAP_DEBUG_TRACE, "do_compare: compare postoperation plugins "
 318                                 "failed.\n", 0, 0, 0);
 319 #endif
 320         }
 321 #endif /* defined( LDAP_SLAPI ) */
 322
 323 cleanup:
 324         free( pdn.bv_val );
 325         free( ndn.bv_val );
 326         if ( ava.aa_value.bv_val ) free( ava.aa_value.bv_val );
 327
 328         return rc;
 329 }
 330
 331 static int compare_entry(
 332         Connection *conn,
 333         Operation *op,
 334         Entry *e,
 335         AttributeAssertion *ava )
 336 {
 337         int rc = LDAP_NO_SUCH_ATTRIBUTE;
 338         Attribute *a;
 339
 340         if ( ! access_allowed( NULL, conn, op, e,
 341                 ava->aa_desc, &ava->aa_value, ACL_COMPARE, NULL ) )
 342         {
 343                 return LDAP_INSUFFICIENT_ACCESS;
 344         }
 345
 346         for(a = attrs_find( e->e_attrs, ava->aa_desc );
 347                 a != NULL;
 348                 a = attrs_find( a->a_next, ava->aa_desc ))
 349         {
 350                 rc = LDAP_COMPARE_FALSE;
 351
 352                 if ( value_find( ava->aa_desc, a->a_vals, &ava->aa_value ) == 0 ) {
 353                         rc = LDAP_COMPARE_TRUE;
 354                         break;
 355                 }
 356         }
 357
 358         return rc;
 359 }