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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2003 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 #ifdef LDAP_SLAPI
  26 #include "slapi.h"
  27 #endif
  28
  29 static int compare_entry(
  30         Operation *op,
  31         Entry *e,
  32         AttributeAssertion *ava );
  33
  34 int
  35 do_compare(
  36     Operation   *op,
  37     SlapReply   *rs
  38 )
  39 {
  40         Entry *entry = NULL;
  41         Entry *fentry = NULL;
  42         struct berval dn = { 0, NULL };
  43         struct berval desc = { 0, NULL };
  44         struct berval value = { 0, NULL };
  45         AttributeAssertion ava = { NULL, { 0, NULL } };
  46         Backend *be;
  47         int manageDSAit;
  48
  49 #ifdef LDAP_SLAPI
  50         Slapi_PBlock *pb = op->o_pb;
  51 #endif
  52
  53         ava.aa_desc = NULL;
  54
  55 #ifdef NEW_LOGGING
  56         LDAP_LOG( OPERATION, ENTRY, "do_compare: conn %d\n", op->o_connid, 0, 0 );
  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, "{m" /*}*/, &dn ) == LBER_ERROR ) {
  73 #ifdef NEW_LOGGING
  74                 LDAP_LOG( OPERATION, ERR,
  75                         "do_compare: conn %d  ber_scanf failed\n", op->o_connid, 0, 0 );
  76 #else
  77                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  78 #endif
  79                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
  80                 return SLAPD_DISCONNECT;
  81         }
  82
  83         if ( ber_scanf( op->o_ber, "{mm}", &desc, &value ) == LBER_ERROR ) {
  84 #ifdef NEW_LOGGING
  85                 LDAP_LOG( OPERATION, ERR,
  86                         "do_compare: conn %d  get ava failed\n", op->o_connid, 0, 0 );
  87 #else
  88                 Debug( LDAP_DEBUG_ANY, "do_compare: get ava failed\n", 0, 0, 0 );
  89 #endif
  90                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
  91                 return SLAPD_DISCONNECT;
  92         }
  93
  94         if ( ber_scanf( op->o_ber, /*{*/ "}" ) == LBER_ERROR ) {
  95 #ifdef NEW_LOGGING
  96                 LDAP_LOG( OPERATION, ERR,
  97                         "do_compare: conn %d  ber_scanf failed\n", op->o_connid, 0, 0 );
  98 #else
  99                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
 100 #endif
 101                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
 102                 return SLAPD_DISCONNECT;
 103         }
 104
 105         if( get_ctrls( op, rs, 1 ) != LDAP_SUCCESS ) {
 106 #ifdef NEW_LOGGING
 107                 LDAP_LOG( OPERATION, INFO,
 108                         "do_compare: conn %d  get_ctrls failed\n", op->o_connid, 0, 0 );
 109 #else
 110                 Debug( LDAP_DEBUG_ANY, "do_compare: get_ctrls failed\n", 0, 0, 0 );
 111 #endif
 112                 goto cleanup;
 113         }
 114
 115         rs->sr_err = dnPrettyNormal( NULL, &dn, &op->o_req_dn, &op->o_req_ndn );
 116         if( rs->sr_err != LDAP_SUCCESS ) {
 117 #ifdef NEW_LOGGING
 118                 LDAP_LOG( OPERATION, INFO,
 119                         "do_compare: conn %d  invalid dn (%s)\n",
 120                         op->o_connid, dn.bv_val, 0 );
 121 #else
 122                 Debug( LDAP_DEBUG_ANY,
 123                         "do_compare: invalid dn (%s)\n", dn.bv_val, 0, 0 );
 124 #endif
 125                 send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid DN" );
 126                 goto cleanup;
 127         }
 128
 129         rs->sr_err = slap_bv2ad( &desc, &ava.aa_desc, &rs->sr_text );
 130         if( rs->sr_err != LDAP_SUCCESS ) {
 131                 send_ldap_result( op, rs );
 132                 goto cleanup;
 133         }
 134
 135 #ifdef SLAP_NVALUES
 136         rs->sr_err = asserted_value_validate_normalize( ava.aa_desc,
 137                 ava.aa_desc->ad_type->sat_equality,
 138                 SLAP_MR_EQUALITY|SLAP_MR_VALUE_OF_ASSERTION_SYNTAX,
 139                 &value, &ava.aa_value, &rs->sr_text );
 140 #else
 141         rs->sr_err = value_validate_normalize( ava.aa_desc, SLAP_MR_EQUALITY,
 142                 &value, &ava.aa_value, &rs->sr_text );
 143 #endif
 144         if( rs->sr_err != LDAP_SUCCESS ) {
 145                 send_ldap_result( op, rs );
 146                 goto cleanup;
 147         }
 148
 149         if( strcasecmp( op->o_req_ndn.bv_val, LDAP_ROOT_DSE ) == 0 ) {
 150 #ifdef NEW_LOGGING
 151                 LDAP_LOG( OPERATION, ARGS,
 152                         "do_compare: dn (%s) attr(%s) value (%s)\n",
 153                         op->o_req_dn.bv_val, 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                         op->o_req_dn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 157 #endif
 158
 159                 Statslog( LDAP_DEBUG_STATS,
 160                         "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 161                         op->o_connid, op->o_opid, op->o_req_dn.bv_val,
 162                         ava.aa_desc->ad_cname.bv_val, 0 );
 163
 164                 if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
 165                         send_ldap_result( op, rs );
 166                         goto cleanup;
 167                 }
 168
 169                 rs->sr_err = root_dse_info( op->o_conn, &entry, &rs->sr_text );
 170                 if( rs->sr_err != LDAP_SUCCESS ) {
 171                         send_ldap_result( op, rs );
 172                         goto cleanup;
 173                 }
 174
 175                 fentry = entry;
 176
 177         } else if ( bvmatch( &op->o_req_ndn, &global_schemandn ) ) {
 178 #ifdef NEW_LOGGING
 179                 LDAP_LOG( OPERATION, ARGS,
 180                         "do_compare: dn (%s) attr(%s) value (%s)\n",
 181                         op->o_req_dn.bv_val, ava.aa_desc->ad_cname.bv_val,
 182                         ava.aa_value.bv_val );
 183 #else
 184                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 185                         op->o_req_dn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 186 #endif
 187
 188                 Statslog( LDAP_DEBUG_STATS,
 189                         "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 190                         op->o_connid, op->o_opid, op->o_req_dn.bv_val,
 191                         ava.aa_desc->ad_cname.bv_val, 0 );
 192
 193                 if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
 194                         send_ldap_result( op, rs );
 195                         rs->sr_err = 0;
 196                         goto cleanup;
 197                 }
 198
 199                 rs->sr_err = schema_info( &entry, &rs->sr_text );
 200                 if( rs->sr_err != LDAP_SUCCESS ) {
 201                         send_ldap_result( op, rs );
 202                         rs->sr_err = 0;
 203                         goto cleanup;
 204                 }
 205                 fentry = entry;
 206         }
 207
 208         if( entry ) {
 209                 rs->sr_err = compare_entry( op, entry, &ava );
 210                 if( fentry) entry_free( fentry );
 211
 212                 send_ldap_result( op, rs );
 213
 214                 if( rs->sr_err == LDAP_COMPARE_TRUE || rs->sr_err == LDAP_COMPARE_FALSE ) {
 215                         rs->sr_err = 0;
 216                 }
 217
 218                 goto cleanup;
 219         }
 220
 221         manageDSAit = get_manageDSAit( op );
 222
 223         /*
 224          * We could be serving multiple database backends.  Select the
 225          * appropriate one, or send a referral to our "referral server"
 226          * if we don't hold it.
 227          */
 228         if ( (op->o_bd = select_backend( &op->o_req_ndn, manageDSAit, 0 )) == NULL ) {
 229                 rs->sr_ref = referral_rewrite( default_referral,
 230                         NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 231
 232                 rs->sr_err = LDAP_REFERRAL;
 233                 if (!rs->sr_ref) rs->sr_ref = default_referral;
 234                 send_ldap_result( op, rs );
 235
 236                 if (rs->sr_ref != default_referral) ber_bvarray_free( rs->sr_ref );
 237                 rs->sr_err = 0;
 238                 goto cleanup;
 239         }
 240
 241         /* check restrictions */
 242         if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
 243                 send_ldap_result( op, rs );
 244                 goto cleanup;
 245         }
 246
 247         /* check for referrals */
 248         if( backend_check_referrals( op, rs ) != LDAP_SUCCESS ) {
 249                 goto cleanup;
 250         }
 251
 252 #ifdef NEW_LOGGING
 253         LDAP_LOG( OPERATION, ARGS,
 254                 "do_compare: dn (%s) attr(%s) value (%s)\n",
 255                 op->o_req_dn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 256 #else
 257         Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 258             op->o_req_dn.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, op->o_req_dn.bv_val,
 263                 ava.aa_desc->ad_cname.bv_val, 0 );
 264
 265 #if defined( LDAP_SLAPI )
 266         slapi_x_pblock_set_operation( pb, op );
 267         slapi_pblock_set( pb, SLAPI_COMPARE_TARGET, (void *)dn.bv_val );
 268         slapi_pblock_set( pb, SLAPI_MANAGEDSAIT, (void *)manageDSAit );
 269         slapi_pblock_set( pb, SLAPI_COMPARE_TYPE, (void *)desc.bv_val );
 270         slapi_pblock_set( pb, SLAPI_COMPARE_VALUE, (void *)&value );
 271
 272         rs->sr_err = doPluginFNs( op->o_bd, SLAPI_PLUGIN_PRE_COMPARE_FN, pb );
 273         if ( rs->sr_err != 0 ) {
 274                 /*
 275                  * A preoperation plugin failure will abort the
 276                  * entire operation.
 277                  */
 278 #ifdef NEW_LOGGING
 279                 LDAP_LOG( OPERATION, INFO, "do_compare: compare preoperation plugin "
 280                                 "failed\n", 0, 0, 0);
 281 #else
 282                 Debug(LDAP_DEBUG_TRACE, "do_compare: compare preoperation plugin "
 283                                 "failed.\n", 0, 0, 0);
 284 #endif
 285                 if ( slapi_pblock_get( pb, SLAPI_RESULT_CODE, (void *)&rs->sr_err ) != 0)
 286                         rs->sr_err = LDAP_OTHER;
 287                 goto cleanup;
 288         }
 289 #endif /* defined( LDAP_SLAPI ) */
 290
 291         if ( op->o_bd->be_compare ) {
 292                 op->oq_compare.rs_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 ( doPluginFNs( 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         free( op->o_req_dn.bv_val );
 313         free( op->o_req_ndn.bv_val );
 314         if ( ava.aa_value.bv_val ) free( ava.aa_value.bv_val );
 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 #ifdef SLAP_NVALUES
 340                 if ( value_find_ex( ava->aa_desc,
 341                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
 342                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
 343                         a->a_nvals,
 344                         &ava->aa_value ) == 0 )
 345 #else
 346                 if ( value_find( ava->aa_desc, a->a_vals, &ava->aa_value ) == 0 )
 347 #endif
 348                 {
 349                         rc = LDAP_COMPARE_TRUE;
 350                         break;
 351                 }
 352         }
 353
 354         return rc;
 355 }