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         char    *dn = NULL, *ndn=NULL;
  40         struct berval desc;
  41         struct berval value;
  42         struct berval *nvalue;
  43         AttributeAssertion ava;
  44         Backend *be;
  45         int rc = LDAP_SUCCESS;
  46         const char *text = NULL;
  47         int manageDSAit;
  48
  49         ava.aa_desc = NULL;
  50         desc.bv_val = NULL;
  51         value.bv_val = 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, "{a" /*}*/, &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         ndn = ch_strdup( dn );
 120
 121         if( dn_normalize( ndn ) == NULL ) {
 122 #ifdef NEW_LOGGING
 123                 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
 124                            "do_compare: conn %d  invalid dn (%s)\n",
 125                            conn->c_connid, dn ));
 126 #else
 127                 Debug( LDAP_DEBUG_ANY, "do_compare: invalid dn (%s)\n", dn, 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, 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, dn, ava.aa_desc->ad_cname.bv_val,
 153                         ava.aa_value->bv_val ));
 154 #else
 155                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 156                         dn, 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, dn, ava.aa_desc->ad_cname.bv_val, 0 );
 162
 163                 rc = backend_check_restrictions( NULL, conn, op, NULL, &text ) ;
 164                 if( rc != LDAP_SUCCESS ) {
 165                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 166                         goto cleanup;
 167                 }
 168
 169                 rc = root_dse_info( conn, &entry, &text );
 170                 if( rc != LDAP_SUCCESS ) {
 171                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 172                         goto cleanup;
 173                 }
 174
 175         } else if ( strcasecmp( ndn, SLAPD_SCHEMA_DN ) == 0 ) {
 176 #ifdef NEW_LOGGING
 177                 LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 178                         "do_compare: conn %d  dn (%s) attr(%s) value (%s)\n",
 179                         conn->c_connid, dn, ava.aa_desc->ad_cname->bv_val,
 180                         ava.aa_value->bv_val ));
 181 #else
 182                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 183                         dn, ava.aa_desc->ad_cname.bv_val, ava.aa_value->bv_val );
 184 #endif
 185
 186                 Statslog( LDAP_DEBUG_STATS,
 187                         "conn=%ld op=%d CMP dn=\"%s\" attr=\"%s\"\n",
 188                         op->o_connid, op->o_opid, dn, ava.aa_desc->ad_cname.bv_val, 0 );
 189
 190                 rc = backend_check_restrictions( NULL, conn, op, NULL, &text ) ;
 191                 if( rc != LDAP_SUCCESS ) {
 192                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 193                         rc = 0;
 194                         goto cleanup;
 195                 }
 196
 197                 rc = schema_info( &entry, &text );
 198                 if( rc != LDAP_SUCCESS ) {
 199                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 200                         rc = 0;
 201                         goto cleanup;
 202                 }
 203         }
 204
 205         if( entry ) {
 206                 rc = compare_entry( conn, op, entry, &ava );
 207                 entry_free( entry );
 208
 209                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 210
 211                 if( rc == LDAP_COMPARE_TRUE || rc == LDAP_COMPARE_FALSE ) {
 212                         rc = 0;
 213                 }
 214
 215                 goto cleanup;
 216         }
 217
 218         manageDSAit = get_manageDSAit( op );
 219
 220         /*
 221          * We could be serving multiple database backends.  Select the
 222          * appropriate one, or send a referral to our "referral server"
 223          * if we don't hold it.
 224          */
 225         if ( (be = select_backend( ndn, manageDSAit )) == NULL ) {
 226                 struct berval **ref = referral_rewrite( default_referral,
 227                         NULL, dn, LDAP_SCOPE_DEFAULT );
 228
 229                 send_ldap_result( conn, op, rc = LDAP_REFERRAL,
 230                         NULL, NULL, ref ? ref : default_referral, NULL );
 231
 232                 ber_bvecfree( ref );
 233                 rc = 0;
 234                 goto cleanup;
 235         }
 236
 237         /* check restrictions */
 238         rc = backend_check_restrictions( be, conn, op, NULL, &text ) ;
 239         if( rc != LDAP_SUCCESS ) {
 240                 send_ldap_result( conn, op, rc,
 241                         NULL, text, NULL, NULL );
 242                 goto cleanup;
 243         }
 244
 245         /* check for referrals */
 246         rc = backend_check_referrals( be, conn, op, dn, ndn );
 247         if ( rc != LDAP_SUCCESS ) {
 248                 goto cleanup;
 249         }
 250
 251 #ifdef NEW_LOGGING
 252         LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 253                    "do_compare: conn %d  dn (%s) attr(%s) value (%s)\n",
 254                    conn->c_connid, dn, ava.aa_desc->ad_cname.bv_val,
 255                    ava.aa_value->bv_val ));
 256 #else
 257         Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 258             dn, ava.aa_desc->ad_cname.bv_val, ava.aa_value->bv_val );
 259 #endif
 260
 261         Statslog( LDAP_DEBUG_STATS, "conn=%ld op=%d CMP dn=\"%s\" attr=\"%s\"\n",
 262             op->o_connid, op->o_opid, dn, ava.aa_desc->ad_cname.bv_val, 0 );
 263
 264
 265         /* deref suffix alias if appropriate */
 266         ndn = suffix_alias( be, ndn );
 267
 268         if ( be->be_compare ) {
 269                 (*be->be_compare)( be, conn, op, dn, ndn, &ava );
 270         } else {
 271                 send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
 272                         NULL, "operation not supported within namingContext", NULL, NULL );
 273         }
 274
 275 cleanup:
 276         free( dn );
 277         free( ndn );
 278         free( desc.bv_val );
 279         free( value.bv_val );
 280
 281         return rc;
 282 }
 283
 284 static int compare_entry(
 285         Connection *conn,
 286         Operation *op,
 287         Entry *e,
 288         AttributeAssertion *ava )
 289 {
 290         int rc = LDAP_NO_SUCH_ATTRIBUTE;
 291         Attribute *a;
 292
 293         if ( ! access_allowed( NULL, conn, op, e,
 294                 ava->aa_desc, ava->aa_value, ACL_COMPARE ) )
 295         {
 296                 return LDAP_INSUFFICIENT_ACCESS;
 297         }
 298
 299         for(a = attrs_find( e->e_attrs, ava->aa_desc );
 300                 a != NULL;
 301                 a = attrs_find( a->a_next, ava->aa_desc ))
 302         {
 303                 rc = LDAP_COMPARE_FALSE;
 304
 305                 if ( value_find( ava->aa_desc, a->a_vals, ava->aa_value ) == 0 ) {
 306                         rc = LDAP_COMPARE_TRUE;
 307                         break;
 308                 }
 309         }
 310
 311         return rc;
 312 }