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 #include <ac/string.h>
  23
  24 #include "ldap_pvt.h"
  25 #include "slap.h"
  26 #ifdef LDAP_SLAPI
  27 #include "slapi.h"
  28 #endif
  29
  30 static int compare_entry(
  31         Operation *op,
  32         Entry *e,
  33         AttributeAssertion *ava );
  34
  35 int
  36 do_compare(
  37     Operation   *op,
  38     SlapReply   *rs
  39 )
  40 {
  41         Entry *entry = NULL;
  42         struct berval dn = { 0, NULL };
  43         struct berval desc = { 0, NULL };
  44         struct berval value = { 0, NULL };
  45         AttributeAssertion ava = { NULL, { 0, NULL } };
  46         int manageDSAit;
  47
  48 #ifdef LDAP_SLAPI
  49         Slapi_PBlock *pb = op->o_pb;
  50 #endif
  51
  52         ava.aa_desc = NULL;
  53
  54 #ifdef NEW_LOGGING
  55         LDAP_LOG( OPERATION, ENTRY, "do_compare: conn %d\n", op->o_connid, 0, 0 );
  56 #else
  57         Debug( LDAP_DEBUG_TRACE, "do_compare\n", 0, 0, 0 );
  58 #endif
  59         /*
  60          * Parse the compare request.  It looks like this:
  61          *
  62          *      CompareRequest := [APPLICATION 14] SEQUENCE {
  63          *              entry   DistinguishedName,
  64          *              ava     SEQUENCE {
  65          *                      type    AttributeType,
  66          *                      value   AttributeValue
  67          *              }
  68          *      }
  69          */
  70
  71         if ( ber_scanf( op->o_ber, "{m" /*}*/, &dn ) == LBER_ERROR ) {
  72 #ifdef NEW_LOGGING
  73                 LDAP_LOG( OPERATION, ERR,
  74                         "do_compare: conn %d  ber_scanf failed\n", op->o_connid, 0, 0 );
  75 #else
  76                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  77 #endif
  78                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
  79                 return SLAPD_DISCONNECT;
  80         }
  81
  82         if ( ber_scanf( op->o_ber, "{mm}", &desc, &value ) == LBER_ERROR ) {
  83 #ifdef NEW_LOGGING
  84                 LDAP_LOG( OPERATION, ERR,
  85                         "do_compare: conn %d  get ava failed\n", op->o_connid, 0, 0 );
  86 #else
  87                 Debug( LDAP_DEBUG_ANY, "do_compare: get ava failed\n", 0, 0, 0 );
  88 #endif
  89                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
  90                 return SLAPD_DISCONNECT;
  91         }
  92
  93         if ( ber_scanf( op->o_ber, /*{*/ "}" ) == LBER_ERROR ) {
  94 #ifdef NEW_LOGGING
  95                 LDAP_LOG( OPERATION, ERR,
  96                         "do_compare: conn %d  ber_scanf failed\n", op->o_connid, 0, 0 );
  97 #else
  98                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  99 #endif
 100                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
 101                 return SLAPD_DISCONNECT;
 102         }
 103
 104         if( get_ctrls( op, rs, 1 ) != LDAP_SUCCESS ) {
 105 #ifdef NEW_LOGGING
 106                 LDAP_LOG( OPERATION, INFO,
 107                         "do_compare: conn %d  get_ctrls failed\n", op->o_connid, 0, 0 );
 108 #else
 109                 Debug( LDAP_DEBUG_ANY, "do_compare: get_ctrls failed\n", 0, 0, 0 );
 110 #endif
 111                 goto cleanup;
 112         }
 113
 114         rs->sr_err = dnPrettyNormal( NULL, &dn, &op->o_req_dn, &op->o_req_ndn, op->o_tmpmemctx );
 115         if( rs->sr_err != LDAP_SUCCESS ) {
 116 #ifdef NEW_LOGGING
 117                 LDAP_LOG( OPERATION, INFO,
 118                         "do_compare: conn %d  invalid dn (%s)\n",
 119                         op->o_connid, dn.bv_val, 0 );
 120 #else
 121                 Debug( LDAP_DEBUG_ANY,
 122                         "do_compare: invalid dn (%s)\n", dn.bv_val, 0, 0 );
 123 #endif
 124                 send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid DN" );
 125                 goto cleanup;
 126         }
 127
 128         rs->sr_err = slap_bv2ad( &desc, &ava.aa_desc, &rs->sr_text );
 129         if( rs->sr_err != LDAP_SUCCESS ) {
 130                 send_ldap_result( op, rs );
 131                 goto cleanup;
 132         }
 133
 134         rs->sr_err = asserted_value_validate_normalize( ava.aa_desc,
 135                 ava.aa_desc->ad_type->sat_equality,
 136                 SLAP_MR_EQUALITY|SLAP_MR_VALUE_OF_ASSERTION_SYNTAX,
 137                 &value, &ava.aa_value, &rs->sr_text, op->o_tmpmemctx );
 138         if( rs->sr_err != LDAP_SUCCESS ) {
 139                 send_ldap_result( op, rs );
 140                 goto cleanup;
 141         }
 142
 143         if( strcasecmp( op->o_req_ndn.bv_val, LDAP_ROOT_DSE ) == 0 ) {
 144 #ifdef NEW_LOGGING
 145                 LDAP_LOG( OPERATION, ARGS,
 146                         "do_compare: dn (%s) attr(%s) value (%s)\n",
 147                         op->o_req_dn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 148 #else
 149                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 150                         op->o_req_dn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 151 #endif
 152
 153                 Statslog( LDAP_DEBUG_STATS,
 154                         "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 155                         op->o_connid, op->o_opid, op->o_req_dn.bv_val,
 156                         ava.aa_desc->ad_cname.bv_val, 0 );
 157
 158                 if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
 159                         send_ldap_result( op, rs );
 160                         goto cleanup;
 161                 }
 162
 163                 rs->sr_err = root_dse_info( op->o_conn, &entry, &rs->sr_text );
 164                 if( rs->sr_err != LDAP_SUCCESS ) {
 165                         send_ldap_result( op, rs );
 166                         goto cleanup;
 167                 }
 168
 169         } else if ( bvmatch( &op->o_req_ndn, &global_schemandn ) ) {
 170 #ifdef NEW_LOGGING
 171                 LDAP_LOG( OPERATION, ARGS,
 172                         "do_compare: dn (%s) attr(%s) value (%s)\n",
 173                         op->o_req_dn.bv_val, ava.aa_desc->ad_cname.bv_val,
 174                         ava.aa_value.bv_val );
 175 #else
 176                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 177                         op->o_req_dn.bv_val, 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                         rs->sr_err = 0;
 188                         goto cleanup;
 189                 }
 190
 191                 rs->sr_err = schema_info( &entry, &rs->sr_text );
 192                 if( rs->sr_err != LDAP_SUCCESS ) {
 193                         send_ldap_result( op, rs );
 194                         rs->sr_err = 0;
 195                         goto cleanup;
 196                 }
 197         }
 198
 199         if( entry ) {
 200                 rs->sr_err = compare_entry( op, entry, &ava );
 201                 entry_free( entry );
 202
 203                 send_ldap_result( op, rs );
 204
 205                 if( rs->sr_err == LDAP_COMPARE_TRUE || rs->sr_err == LDAP_COMPARE_FALSE ) {
 206                         rs->sr_err = 0;
 207                 }
 208
 209                 goto cleanup;
 210         }
 211
 212         manageDSAit = get_manageDSAit( op );
 213
 214         /*
 215          * We could be serving multiple database backends.  Select the
 216          * appropriate one, or send a referral to our "referral server"
 217          * if we don't hold it.
 218          */
 219         if ( (op->o_bd = select_backend( &op->o_req_ndn, manageDSAit, 0 )) == NULL ) {
 220                 rs->sr_ref = referral_rewrite( default_referral,
 221                         NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 222
 223                 rs->sr_err = LDAP_REFERRAL;
 224                 if (!rs->sr_ref) rs->sr_ref = default_referral;
 225                 send_ldap_result( op, rs );
 226
 227                 if (rs->sr_ref != default_referral) ber_bvarray_free( rs->sr_ref );
 228                 rs->sr_err = 0;
 229                 goto cleanup;
 230         }
 231
 232         /* check restrictions */
 233         if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
 234                 send_ldap_result( op, rs );
 235                 goto cleanup;
 236         }
 237
 238         /* check for referrals */
 239         if( backend_check_referrals( op, rs ) != LDAP_SUCCESS ) {
 240                 goto cleanup;
 241         }
 242
 243 #ifdef NEW_LOGGING
 244         LDAP_LOG( OPERATION, ARGS,
 245                 "do_compare: dn (%s) attr(%s) value (%s)\n",
 246                 op->o_req_dn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 247 #else
 248         Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 249             op->o_req_dn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 250 #endif
 251
 252         Statslog( LDAP_DEBUG_STATS, "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 253             op->o_connid, op->o_opid, op->o_req_dn.bv_val,
 254                 ava.aa_desc->ad_cname.bv_val, 0 );
 255
 256 #if defined( LDAP_SLAPI )
 257         slapi_x_pblock_set_operation( pb, op );
 258         slapi_pblock_set( pb, SLAPI_COMPARE_TARGET, (void *)dn.bv_val );
 259         slapi_pblock_set( pb, SLAPI_MANAGEDSAIT, (void *)manageDSAit );
 260         slapi_pblock_set( pb, SLAPI_COMPARE_TYPE, (void *)desc.bv_val );
 261         slapi_pblock_set( pb, SLAPI_COMPARE_VALUE, (void *)&value );
 262
 263         rs->sr_err = doPluginFNs( op->o_bd, SLAPI_PLUGIN_PRE_COMPARE_FN, pb );
 264         if ( rs->sr_err < 0 ) {
 265                 /*
 266                  * A preoperation plugin failure will abort the
 267                  * entire operation.
 268                  */
 269 #ifdef NEW_LOGGING
 270                 LDAP_LOG( OPERATION, INFO, "do_compare: compare preoperation plugin "
 271                                 "failed\n", 0, 0, 0);
 272 #else
 273                 Debug(LDAP_DEBUG_TRACE, "do_compare: compare preoperation plugin "
 274                                 "failed.\n", 0, 0, 0);
 275 #endif
 276                 if ( ( slapi_pblock_get( op->o_pb, SLAPI_RESULT_CODE, (void *)&rs->sr_err ) != 0 )  ||
 277                      rs->sr_err == LDAP_SUCCESS ) {
 278                         rs->sr_err = LDAP_OTHER;
 279                 }
 280                 goto cleanup;
 281         }
 282 #endif /* defined( LDAP_SLAPI ) */
 283
 284         if ( op->o_bd->be_compare ) {
 285                 op->orc_ava = &ava;
 286                 op->o_bd->be_compare( op, rs );
 287         } else {
 288                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
 289                         "operation not supported within namingContext" );
 290         }
 291
 292 #if defined( LDAP_SLAPI )
 293         if ( doPluginFNs( op->o_bd, SLAPI_PLUGIN_POST_COMPARE_FN, pb ) < 0 ) {
 294 #ifdef NEW_LOGGING
 295                 LDAP_LOG( OPERATION, INFO, "do_compare: compare postoperation plugins "
 296                                 "failed\n", 0, 0, 0 );
 297 #else
 298                 Debug(LDAP_DEBUG_TRACE, "do_compare: compare postoperation plugins "
 299                                 "failed.\n", 0, 0, 0);
 300 #endif
 301         }
 302 #endif /* defined( LDAP_SLAPI ) */
 303
 304 cleanup:
 305         op->o_tmpfree( op->o_req_dn.bv_val, op->o_tmpmemctx );
 306         op->o_tmpfree( op->o_req_ndn.bv_val, op->o_tmpmemctx );
 307         if ( ava.aa_value.bv_val ) op->o_tmpfree( ava.aa_value.bv_val, op->o_tmpmemctx );
 308
 309         return rs->sr_err;
 310 }
 311
 312 static int compare_entry(
 313         Operation *op,
 314         Entry *e,
 315         AttributeAssertion *ava )
 316 {
 317         int rc = LDAP_NO_SUCH_ATTRIBUTE;
 318         Attribute *a;
 319
 320         if ( ! access_allowed( op, e,
 321                 ava->aa_desc, &ava->aa_value, ACL_COMPARE, NULL ) )
 322         {
 323                 return LDAP_INSUFFICIENT_ACCESS;
 324         }
 325
 326         for(a = attrs_find( e->e_attrs, ava->aa_desc );
 327                 a != NULL;
 328                 a = attrs_find( a->a_next, ava->aa_desc ))
 329         {
 330                 rc = LDAP_COMPARE_FALSE;
 331
 332                 if ( value_find_ex( ava->aa_desc,
 333                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
 334                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
 335                         a->a_nvals,
 336                         &ava->aa_value, op->o_tmpmemctx ) == 0 )
 337                 {
 338                         rc = LDAP_COMPARE_TRUE;
 339                         break;
 340                 }
 341         }
 342
 343         return rc;
 344 }