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