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