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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2000 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
  26 static int compare_entry(
  27         Connection *conn,
  28         Operation *op,
  29         Entry *e,
  30         AttributeAssertion *ava );
  31
  32 int
  33 do_compare(
  34     Connection  *conn,
  35     Operation   *op
  36 )
  37 {
  38         Entry *entry = NULL;
  39         struct berval dn = { 0, NULL };
  40         struct berval pdn = { 0, NULL };
  41         struct berval ndn = { 0, NULL };
  42         struct berval desc = { 0, NULL };
  43         struct berval value = { 0, NULL };
  44         struct berval *nvalue;
  45         AttributeAssertion ava;
  46         Backend *be;
  47         int rc = LDAP_SUCCESS;
  48         const char *text = NULL;
  49         int manageDSAit;
  50
  51         ava.aa_desc = NULL;
  52
  53 #ifdef NEW_LOGGING
  54         LDAP_LOG(( "operation", LDAP_LEVEL_ENTRY,
  55                 "do_compare: conn %d\n", conn->c_connid ));
  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, "{o" /*}*/, &dn ) == LBER_ERROR ) {
  72 #ifdef NEW_LOGGING
  73                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
  74                         "do_compare: conn %d  ber_scanf failed\n", conn->c_connid ));
  75 #else
  76                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  77 #endif
  78                 send_ldap_disconnect( conn, op,
  79                         LDAP_PROTOCOL_ERROR, "decoding error" );
  80                 return SLAPD_DISCONNECT;
  81         }
  82
  83         if ( ber_scanf( op->o_ber, "{oo}", &desc, &value ) == LBER_ERROR ) {
  84 #ifdef NEW_LOGGING
  85                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
  86                         "do_compare: conn %d  get ava failed\n", conn->c_connid ));
  87 #else
  88                 Debug( LDAP_DEBUG_ANY, "do_compare: get ava failed\n", 0, 0, 0 );
  89 #endif
  90                 send_ldap_disconnect( conn, op,
  91                         LDAP_PROTOCOL_ERROR, "decoding error" );
  92                 rc = SLAPD_DISCONNECT;
  93                 goto cleanup;
  94         }
  95
  96         if ( ber_scanf( op->o_ber, /*{*/ "}" ) == LBER_ERROR ) {
  97 #ifdef NEW_LOGGING
  98                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
  99                         "do_compare: conn %d  ber_scanf failed\n", conn->c_connid ));
 100 #else
 101                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
 102 #endif
 103                 send_ldap_disconnect( conn, op,
 104                         LDAP_PROTOCOL_ERROR, "decoding error" );
 105                 rc = SLAPD_DISCONNECT;
 106                 goto cleanup;
 107         }
 108
 109         if( ( rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
 110 #ifdef NEW_LOGGING
 111                 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
 112                         "do_compare: conn %d  get_ctrls failed\n", conn->c_connid ));
 113 #else
 114                 Debug( LDAP_DEBUG_ANY, "do_compare: get_ctrls failed\n", 0, 0, 0 );
 115 #endif
 116                 goto cleanup;
 117         }
 118
 119         rc = dnPrettyNormal( NULL, &dn, &pdn, &ndn );
 120         if( rc != LDAP_SUCCESS ) {
 121 #ifdef NEW_LOGGING
 122                 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
 123                         "do_compare: conn %d  invalid dn (%s)\n",
 124                         conn->c_connid, dn.bv_val ));
 125 #else
 126                 Debug( LDAP_DEBUG_ANY,
 127                         "do_compare: invalid dn (%s)\n", dn.bv_val, 0, 0 );
 128 #endif
 129                 send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
 130                     "invalid DN", NULL, NULL );
 131                 goto cleanup;
 132         }
 133
 134         rc = slap_bv2ad( &desc, &ava.aa_desc, &text );
 135         if( rc != LDAP_SUCCESS ) {
 136                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 137                 goto cleanup;
 138         }
 139
 140         rc = value_normalize( ava.aa_desc, SLAP_MR_EQUALITY, &value, &nvalue, &text );
 141         if( rc != LDAP_SUCCESS ) {
 142                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 143                 goto cleanup;
 144         }
 145
 146         ava.aa_value = nvalue;
 147
 148         if( strcasecmp( ndn.bv_val, LDAP_ROOT_DSE ) == 0 ) {
 149 #ifdef NEW_LOGGING
 150                 LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 151                         "do_compare: conn %d  dn (%s) attr(%s) value (%s)\n",
 152                         conn->c_connid, pdn.bv_val,
 153                         ava.aa_desc->ad_cname.bv_val, ava.aa_value->bv_val ));
 154 #else
 155                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 156                         pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value->bv_val );
 157 #endif
 158
 159                 Statslog( LDAP_DEBUG_STATS,
 160                         "conn=%ld op=%d CMP dn=\"%s\" attr=\"%s\"\n",
 161                         op->o_connid, op->o_opid, pdn.bv_val,
 162                         ava.aa_desc->ad_cname.bv_val, 0 );
 163
 164                 rc = backend_check_restrictions( NULL, conn, op, NULL, &text ) ;
 165                 if( rc != LDAP_SUCCESS ) {
 166                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 167                         goto cleanup;
 168                 }
 169
 170                 rc = root_dse_info( conn, &entry, &text );
 171                 if( rc != LDAP_SUCCESS ) {
 172                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 173                         goto cleanup;
 174                 }
 175
 176         } else if ( strcasecmp( ndn.bv_val, SLAPD_SCHEMA_DN ) == 0 ) {
 177 #ifdef NEW_LOGGING
 178                 LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 179                         "do_compare: conn %d  dn (%s) attr(%s) value (%s)\n",
 180                         conn->c_connid, pdn.bv_val, ava.aa_desc->ad_cname.bv_val,
 181                         ava.aa_value->bv_val ));
 182 #else
 183                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 184                         pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value->bv_val );
 185 #endif
 186
 187                 Statslog( LDAP_DEBUG_STATS,
 188                         "conn=%ld op=%d CMP dn=\"%s\" attr=\"%s\"\n",
 189                         op->o_connid, op->o_opid, pdn.bv_val,
 190                         ava.aa_desc->ad_cname.bv_val, 0 );
 191
 192                 rc = backend_check_restrictions( NULL, conn, op, NULL, &text ) ;
 193                 if( rc != LDAP_SUCCESS ) {
 194                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 195                         rc = 0;
 196                         goto cleanup;
 197                 }
 198
 199                 rc = schema_info( &entry, &text );
 200                 if( rc != LDAP_SUCCESS ) {
 201                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 202                         rc = 0;
 203                         goto cleanup;
 204                 }
 205         }
 206
 207         if( entry ) {
 208                 rc = compare_entry( conn, op, entry, &ava );
 209                 entry_free( entry );
 210
 211                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 212
 213                 if( rc == LDAP_COMPARE_TRUE || rc == LDAP_COMPARE_FALSE ) {
 214                         rc = 0;
 215                 }
 216
 217                 goto cleanup;
 218         }
 219
 220         manageDSAit = get_manageDSAit( op );
 221
 222         /*
 223          * We could be serving multiple database backends.  Select the
 224          * appropriate one, or send a referral to our "referral server"
 225          * if we don't hold it.
 226          */
 227         if ( (be = select_backend( &ndn, manageDSAit, 0 )) == NULL ) {
 228                 struct berval **ref = referral_rewrite( default_referral,
 229                         NULL, &pdn, LDAP_SCOPE_DEFAULT );
 230
 231                 send_ldap_result( conn, op, rc = LDAP_REFERRAL,
 232                         NULL, NULL, ref ? ref : default_referral, NULL );
 233
 234                 ber_bvecfree( ref );
 235                 rc = 0;
 236                 goto cleanup;
 237         }
 238
 239         /* check restrictions */
 240         rc = backend_check_restrictions( be, conn, op, NULL, &text ) ;
 241         if( rc != LDAP_SUCCESS ) {
 242                 send_ldap_result( conn, op, rc,
 243                         NULL, text, NULL, NULL );
 244                 goto cleanup;
 245         }
 246
 247         /* check for referrals */
 248         rc = backend_check_referrals( be, conn, op, &pdn, &ndn );
 249         if ( rc != LDAP_SUCCESS ) {
 250                 goto cleanup;
 251         }
 252
 253 #ifdef NEW_LOGGING
 254         LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 255                 "do_compare: conn %d     dn (%s) attr(%s) value (%s)\n",
 256                 conn->c_connid, pdn.bv_val, ava.aa_desc->ad_cname.bv_val,
 257                 ava.aa_value->bv_val ));
 258 #else
 259         Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 260             pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value->bv_val );
 261 #endif
 262
 263         Statslog( LDAP_DEBUG_STATS, "conn=%ld op=%d CMP dn=\"%s\" attr=\"%s\"\n",
 264             op->o_connid, op->o_opid, pdn.bv_val,
 265                 ava.aa_desc->ad_cname.bv_val, 0 );
 266
 267
 268         /* deref suffix alias if appropriate */
 269         suffix_alias( be, &ndn );
 270
 271         if ( be->be_compare ) {
 272                 (*be->be_compare)( be, conn, op, &pdn, &ndn, &ava );
 273         } else {
 274                 send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
 275                         NULL, "operation not supported within namingContext",
 276                         NULL, NULL );
 277         }
 278
 279 cleanup:
 280         free( dn.bv_val );
 281         free( pdn.bv_val );
 282         free( ndn.bv_val );
 283         free( desc.bv_val );
 284         free( value.bv_val );
 285
 286         return rc;
 287 }
 288
 289 static int compare_entry(
 290         Connection *conn,
 291         Operation *op,
 292         Entry *e,
 293         AttributeAssertion *ava )
 294 {
 295         int rc = LDAP_NO_SUCH_ATTRIBUTE;
 296         Attribute *a;
 297
 298         if ( ! access_allowed( NULL, conn, op, e,
 299                 ava->aa_desc, ava->aa_value, ACL_COMPARE ) )
 300         {
 301                 return LDAP_INSUFFICIENT_ACCESS;
 302         }
 303
 304         for(a = attrs_find( e->e_attrs, ava->aa_desc );
 305                 a != NULL;
 306                 a = attrs_find( a->a_next, ava->aa_desc ))
 307         {
 308                 rc = LDAP_COMPARE_FALSE;
 309
 310                 if ( value_find( ava->aa_desc, a->a_vals, ava->aa_value ) == 0 ) {
 311                         rc = LDAP_COMPARE_TRUE;
 312                         break;
 313                 }
 314         }
 315
 316         return rc;
 317 }