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         char *ndn = NULL;
  41         struct berval desc;
  42         struct berval value;
  43         struct berval *nvalue;
  44         AttributeAssertion ava;
  45         Backend *be;
  46         int rc = LDAP_SUCCESS;
  47         const char *text = NULL;
  48         int manageDSAit;
  49
  50         ava.aa_desc = NULL;
  51         desc.bv_val = NULL;
  52         value.bv_val = NULL;
  53
  54 #ifdef NEW_LOGGING
  55         LDAP_LOG(( "operation", LDAP_LEVEL_ENTRY,
  56                 "do_compare: conn %d\n", conn->c_connid ));
  57 #else
  58         Debug( LDAP_DEBUG_TRACE, "do_compare\n", 0, 0, 0 );
  59 #endif
  60         /*
  61          * Parse the compare request.  It looks like this:
  62          *
  63          *      CompareRequest := [APPLICATION 14] SEQUENCE {
  64          *              entry   DistinguishedName,
  65          *              ava     SEQUENCE {
  66          *                      type    AttributeType,
  67          *                      value   AttributeValue
  68          *              }
  69          *      }
  70          */
  71
  72         if ( ber_scanf( op->o_ber, "{o" /*}*/, &dn ) == LBER_ERROR ) {
  73 #ifdef NEW_LOGGING
  74                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
  75                         "do_compare: conn %d  ber_scanf failed\n", conn->c_connid ));
  76 #else
  77                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  78 #endif
  79                 send_ldap_disconnect( conn, op,
  80                         LDAP_PROTOCOL_ERROR, "decoding error" );
  81                 return SLAPD_DISCONNECT;
  82         }
  83
  84         if ( ber_scanf( op->o_ber, "{oo}", &desc, &value ) == LBER_ERROR ) {
  85 #ifdef NEW_LOGGING
  86                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
  87                         "do_compare: conn %d  get ava failed\n", conn->c_connid ));
  88 #else
  89                 Debug( LDAP_DEBUG_ANY, "do_compare: get ava failed\n", 0, 0, 0 );
  90 #endif
  91                 send_ldap_disconnect( conn, op,
  92                         LDAP_PROTOCOL_ERROR, "decoding error" );
  93                 rc = SLAPD_DISCONNECT;
  94                 goto cleanup;
  95         }
  96
  97         if ( ber_scanf( op->o_ber, /*{*/ "}" ) == LBER_ERROR ) {
  98 #ifdef NEW_LOGGING
  99                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
 100                         "do_compare: conn %d  ber_scanf failed\n", conn->c_connid ));
 101 #else
 102                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
 103 #endif
 104                 send_ldap_disconnect( conn, op,
 105                         LDAP_PROTOCOL_ERROR, "decoding error" );
 106                 rc = SLAPD_DISCONNECT;
 107                 goto cleanup;
 108         }
 109
 110         if( ( rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
 111 #ifdef NEW_LOGGING
 112                 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
 113                         "do_compare: conn %d  get_ctrls failed\n", conn->c_connid ));
 114 #else
 115                 Debug( LDAP_DEBUG_ANY, "do_compare: get_ctrls failed\n", 0, 0, 0 );
 116 #endif
 117                 goto cleanup;
 118         }
 119
 120         ndn = ch_strdup( dn.bv_val );
 121
 122         if( dn_normalize( ndn ) == NULL ) {
 123 #ifdef NEW_LOGGING
 124                 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
 125                         "do_compare: conn %d  invalid dn (%s)\n",
 126                         conn->c_connid, dn.bv_val ));
 127 #else
 128                 Debug( LDAP_DEBUG_ANY,
 129                         "do_compare: invalid dn (%s)\n", dn.bv_val, 0, 0 );
 130 #endif
 131                 send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
 132                     "invalid DN", NULL, NULL );
 133                 goto cleanup;
 134         }
 135
 136         rc = slap_bv2ad( &desc, &ava.aa_desc, &text );
 137         if( rc != LDAP_SUCCESS ) {
 138                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 139                 goto cleanup;
 140         }
 141
 142         rc = value_normalize( ava.aa_desc, SLAP_MR_EQUALITY, &value, &nvalue, &text );
 143         if( rc != LDAP_SUCCESS ) {
 144                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 145                 goto cleanup;
 146         }
 147
 148         ava.aa_value = nvalue;
 149
 150         if( strcasecmp( ndn, LDAP_ROOT_DSE ) == 0 ) {
 151 #ifdef NEW_LOGGING
 152                 LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 153                         "do_compare: conn %d  dn (%s) attr(%s) value (%s)\n",
 154                         conn->c_connid, dn.bv_val, ava.aa_desc->ad_cname.bv_val,
 155                         ava.aa_value->bv_val ));
 156 #else
 157                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 158                         dn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value->bv_val );
 159 #endif
 160
 161                 Statslog( LDAP_DEBUG_STATS,
 162                         "conn=%ld op=%d CMP dn=\"%s\" attr=\"%s\"\n",
 163                         op->o_connid, op->o_opid, dn.bv_val,
 164                         ava.aa_desc->ad_cname.bv_val, 0 );
 165
 166                 rc = backend_check_restrictions( NULL, conn, op, NULL, &text ) ;
 167                 if( rc != LDAP_SUCCESS ) {
 168                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 169                         goto cleanup;
 170                 }
 171
 172                 rc = root_dse_info( conn, &entry, &text );
 173                 if( rc != LDAP_SUCCESS ) {
 174                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 175                         goto cleanup;
 176                 }
 177
 178         } else if ( strcasecmp( ndn, SLAPD_SCHEMA_DN ) == 0 ) {
 179 #ifdef NEW_LOGGING
 180                 LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 181                         "do_compare: conn %d  dn (%s) attr(%s) value (%s)\n",
 182                         conn->c_connid, dn.bv_val, ava.aa_desc->ad_cname.bv_val,
 183                         ava.aa_value->bv_val ));
 184 #else
 185                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 186                         dn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value->bv_val );
 187 #endif
 188
 189                 Statslog( LDAP_DEBUG_STATS,
 190                         "conn=%ld op=%d CMP dn=\"%s\" attr=\"%s\"\n",
 191                         op->o_connid, op->o_opid, dn.bv_val,
 192                         ava.aa_desc->ad_cname.bv_val, 0 );
 193
 194                 rc = backend_check_restrictions( NULL, conn, op, NULL, &text ) ;
 195                 if( rc != LDAP_SUCCESS ) {
 196                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 197                         rc = 0;
 198                         goto cleanup;
 199                 }
 200
 201                 rc = schema_info( &entry, &text );
 202                 if( rc != LDAP_SUCCESS ) {
 203                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 204                         rc = 0;
 205                         goto cleanup;
 206                 }
 207         }
 208
 209         if( entry ) {
 210                 rc = compare_entry( conn, op, entry, &ava );
 211                 entry_free( entry );
 212
 213                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 214
 215                 if( rc == LDAP_COMPARE_TRUE || rc == LDAP_COMPARE_FALSE ) {
 216                         rc = 0;
 217                 }
 218
 219                 goto cleanup;
 220         }
 221
 222         manageDSAit = get_manageDSAit( op );
 223
 224         /*
 225          * We could be serving multiple database backends.  Select the
 226          * appropriate one, or send a referral to our "referral server"
 227          * if we don't hold it.
 228          */
 229         if ( (be = select_backend( ndn, manageDSAit, 0 )) == NULL ) {
 230                 struct berval **ref = referral_rewrite( default_referral,
 231                         NULL, dn.bv_val, LDAP_SCOPE_DEFAULT );
 232
 233                 send_ldap_result( conn, op, rc = LDAP_REFERRAL,
 234                         NULL, NULL, ref ? ref : default_referral, NULL );
 235
 236                 ber_bvecfree( ref );
 237                 rc = 0;
 238                 goto cleanup;
 239         }
 240
 241         /* check restrictions */
 242         rc = backend_check_restrictions( be, conn, op, NULL, &text ) ;
 243         if( rc != LDAP_SUCCESS ) {
 244                 send_ldap_result( conn, op, rc,
 245                         NULL, text, NULL, NULL );
 246                 goto cleanup;
 247         }
 248
 249         /* check for referrals */
 250         rc = backend_check_referrals( be, conn, op, dn.bv_val, ndn );
 251         if ( rc != LDAP_SUCCESS ) {
 252                 goto cleanup;
 253         }
 254
 255 #ifdef NEW_LOGGING
 256         LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 257                 "do_compare: conn %d     dn (%s) attr(%s) value (%s)\n",
 258                 conn->c_connid, dn.bv_val, ava.aa_desc->ad_cname.bv_val,
 259                 ava.aa_value->bv_val ));
 260 #else
 261         Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 262             dn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value->bv_val );
 263 #endif
 264
 265         Statslog( LDAP_DEBUG_STATS, "conn=%ld op=%d CMP dn=\"%s\" attr=\"%s\"\n",
 266             op->o_connid, op->o_opid, dn, ava.aa_desc->ad_cname.bv_val, 0 );
 267
 268
 269         /* deref suffix alias if appropriate */
 270         ndn = suffix_alias( be, ndn );
 271
 272         if ( be->be_compare ) {
 273                 (*be->be_compare)( be, conn, op, dn.bv_val, ndn, &ava );
 274         } else {
 275                 send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
 276                         NULL, "operation not supported within namingContext", NULL, NULL );
 277         }
 278
 279 cleanup:
 280         free( dn.bv_val );
 281         free( ndn );
 282         free( desc.bv_val );
 283         free( value.bv_val );
 284
 285         return rc;
 286 }
 287
 288 static int compare_entry(
 289         Connection *conn,
 290         Operation *op,
 291         Entry *e,
 292         AttributeAssertion *ava )
 293 {
 294         int rc = LDAP_NO_SUCH_ATTRIBUTE;
 295         Attribute *a;
 296
 297         if ( ! access_allowed( NULL, conn, op, e,
 298                 ava->aa_desc, ava->aa_value, ACL_COMPARE ) )
 299         {
 300                 return LDAP_INSUFFICIENT_ACCESS;
 301         }
 302
 303         for(a = attrs_find( e->e_attrs, ava->aa_desc );
 304                 a != NULL;
 305                 a = attrs_find( a->a_next, ava->aa_desc ))
 306         {
 307                 rc = LDAP_COMPARE_FALSE;
 308
 309                 if ( value_find( ava->aa_desc, a->a_vals, ava->aa_value ) == 0 ) {
 310                         rc = LDAP_COMPARE_TRUE;
 311                         break;
 312                 }
 313         }
 314
 315         return rc;
 316 }