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