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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2002 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         AttributeAssertion ava = { 0 };
  45         Backend *be;
  46         int rc = LDAP_SUCCESS;
  47         const char *text = NULL;
  48         int manageDSAit;
  49
  50         ava.aa_desc = NULL;
  51
  52 #ifdef NEW_LOGGING
  53         LDAP_LOG(( "operation", LDAP_LEVEL_ENTRY,
  54                 "do_compare: conn %d\n", conn->c_connid ));
  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", LDAP_LEVEL_ERR,
  73                         "do_compare: conn %d  ber_scanf failed\n", conn->c_connid ));
  74 #else
  75                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  76 #endif
  77                 send_ldap_disconnect( conn, op,
  78                         LDAP_PROTOCOL_ERROR, "decoding error" );
  79                 return SLAPD_DISCONNECT;
  80         }
  81
  82         if ( ber_scanf( op->o_ber, "{mm}", &desc, &value ) == LBER_ERROR ) {
  83 #ifdef NEW_LOGGING
  84                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
  85                         "do_compare: conn %d  get ava failed\n", conn->c_connid ));
  86 #else
  87                 Debug( LDAP_DEBUG_ANY, "do_compare: get ava failed\n", 0, 0, 0 );
  88 #endif
  89                 send_ldap_disconnect( conn, op,
  90                         LDAP_PROTOCOL_ERROR, "decoding error" );
  91                 rc = SLAPD_DISCONNECT;
  92                 goto cleanup;
  93         }
  94
  95         if ( ber_scanf( op->o_ber, /*{*/ "}" ) == LBER_ERROR ) {
  96 #ifdef NEW_LOGGING
  97                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
  98                         "do_compare: conn %d  ber_scanf failed\n", conn->c_connid ));
  99 #else
 100                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
 101 #endif
 102                 send_ldap_disconnect( conn, op,
 103                         LDAP_PROTOCOL_ERROR, "decoding error" );
 104                 rc = SLAPD_DISCONNECT;
 105                 goto cleanup;
 106         }
 107
 108         if( ( rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
 109 #ifdef NEW_LOGGING
 110                 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
 111                         "do_compare: conn %d  get_ctrls failed\n", conn->c_connid ));
 112 #else
 113                 Debug( LDAP_DEBUG_ANY, "do_compare: get_ctrls failed\n", 0, 0, 0 );
 114 #endif
 115                 goto cleanup;
 116         }
 117
 118         rc = dnPrettyNormal( NULL, &dn, &pdn, &ndn );
 119         if( rc != LDAP_SUCCESS ) {
 120 #ifdef NEW_LOGGING
 121                 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
 122                         "do_compare: conn %d  invalid dn (%s)\n",
 123                         conn->c_connid, dn.bv_val ));
 124 #else
 125                 Debug( LDAP_DEBUG_ANY,
 126                         "do_compare: invalid dn (%s)\n", dn.bv_val, 0, 0 );
 127 #endif
 128                 send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
 129                     "invalid DN", NULL, NULL );
 130                 goto cleanup;
 131         }
 132
 133         rc = slap_bv2ad( &desc, &ava.aa_desc, &text );
 134         if( rc != LDAP_SUCCESS ) {
 135                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 136                 goto cleanup;
 137         }
 138
 139         rc = value_validate_normalize( ava.aa_desc, SLAP_MR_EQUALITY,
 140                 &value, &ava.aa_value, &text );
 141         if( rc != LDAP_SUCCESS ) {
 142                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 143                 goto cleanup;
 144         }
 145
 146         if( strcasecmp( ndn.bv_val, LDAP_ROOT_DSE ) == 0 ) {
 147 #ifdef NEW_LOGGING
 148                 LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 149                         "do_compare: conn %d  dn (%s) attr(%s) value (%s)\n",
 150                         conn->c_connid, pdn.bv_val,
 151                         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                         pdn.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, pdn.bv_val,
 160                         ava.aa_desc->ad_cname.bv_val, 0 );
 161
 162                 rc = backend_check_restrictions( NULL, conn, op, NULL, &text ) ;
 163                 if( rc != LDAP_SUCCESS ) {
 164                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 165                         goto cleanup;
 166                 }
 167
 168                 rc = root_dse_info( conn, &entry, &text );
 169                 if( rc != LDAP_SUCCESS ) {
 170                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 171                         goto cleanup;
 172                 }
 173
 174         } else if ( strcasecmp( ndn.bv_val, SLAPD_SCHEMA_DN ) == 0 ) {
 175 #ifdef NEW_LOGGING
 176                 LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 177                         "do_compare: conn %d  dn (%s) attr(%s) value (%s)\n",
 178                         conn->c_connid, pdn.bv_val, ava.aa_desc->ad_cname.bv_val,
 179                         ava.aa_value.bv_val ));
 180 #else
 181                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 182                         pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 183 #endif
 184
 185                 Statslog( LDAP_DEBUG_STATS,
 186                         "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 187                         op->o_connid, op->o_opid, pdn.bv_val,
 188                         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, 0 )) == NULL ) {
 226                 BerVarray ref = referral_rewrite( default_referral,
 227                         NULL, &pdn, LDAP_SCOPE_DEFAULT );
 228
 229                 send_ldap_result( conn, op, rc = LDAP_REFERRAL,
 230                         NULL, NULL, ref ? ref : default_referral, NULL );
 231
 232                 ber_bvarray_free( 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, &pdn, &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, pdn.bv_val, 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             pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 259 #endif
 260
 261         Statslog( LDAP_DEBUG_STATS, "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 262             op->o_connid, op->o_opid, pdn.bv_val,
 263                 ava.aa_desc->ad_cname.bv_val, 0 );
 264
 265
 266         /* deref suffix alias if appropriate */
 267         suffix_alias( be, &ndn );
 268
 269         if ( be->be_compare ) {
 270                 (*be->be_compare)( be, conn, op, &pdn, &ndn, &ava );
 271         } else {
 272                 send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
 273                         NULL, "operation not supported within namingContext",
 274                         NULL, NULL );
 275         }
 276
 277 cleanup:
 278         free( pdn.bv_val );
 279         free( ndn.bv_val );
 280         if ( ava.aa_value.bv_val ) free( ava.aa_value.bv_val );
 281
 282         return rc;
 283 }
 284
 285 static int compare_entry(
 286         Connection *conn,
 287         Operation *op,
 288         Entry *e,
 289         AttributeAssertion *ava )
 290 {
 291         int rc = LDAP_NO_SUCH_ATTRIBUTE;
 292         Attribute *a;
 293
 294         if ( ! access_allowed( NULL, conn, op, e,
 295                 ava->aa_desc, &ava->aa_value, ACL_COMPARE, NULL ) )
 296         {
 297                 return LDAP_INSUFFICIENT_ACCESS;
 298         }
 299
 300         for(a = attrs_find( e->e_attrs, ava->aa_desc );
 301                 a != NULL;
 302                 a = attrs_find( a->a_next, ava->aa_desc ))
 303         {
 304                 rc = LDAP_COMPARE_FALSE;
 305
 306                 if ( value_find( ava->aa_desc, a->a_vals, &ava->aa_value ) == 0 ) {
 307                         rc = LDAP_COMPARE_TRUE;
 308                         break;
 309                 }
 310         }
 311
 312         return rc;
 313 }