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 #include <ac/string.h>
  23
  24 #include "ldap_pvt.h"
  25 #include "slap.h"
  26 #ifdef LDAP_SLAPI
  27 #include "slapi.h"
  28 #endif
  29
  30 static int compare_entry(
  31         Operation *op,
  32         Entry *e,
  33         AttributeAssertion *ava );
  34
  35 int
  36 do_compare(
  37     Operation   *op,
  38     SlapReply   *rs
  39 )
  40 {
  41         Entry *entry = 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         int manageDSAit;
  47
  48         ava.aa_desc = NULL;
  49
  50 #ifdef NEW_LOGGING
  51         LDAP_LOG( OPERATION, ENTRY, "do_compare: conn %d\n", op->o_connid, 0, 0 );
  52 #else
  53         Debug( LDAP_DEBUG_TRACE, "do_compare\n", 0, 0, 0 );
  54 #endif
  55         /*
  56          * Parse the compare request.  It looks like this:
  57          *
  58          *      CompareRequest := [APPLICATION 14] SEQUENCE {
  59          *              entry   DistinguishedName,
  60          *              ava     SEQUENCE {
  61          *                      type    AttributeType,
  62          *                      value   AttributeValue
  63          *              }
  64          *      }
  65          */
  66
  67         if ( ber_scanf( op->o_ber, "{m" /*}*/, &dn ) == LBER_ERROR ) {
  68 #ifdef NEW_LOGGING
  69                 LDAP_LOG( OPERATION, ERR,
  70                         "do_compare: conn %d  ber_scanf failed\n", op->o_connid, 0, 0 );
  71 #else
  72                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  73 #endif
  74                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
  75                 return SLAPD_DISCONNECT;
  76         }
  77
  78         if ( ber_scanf( op->o_ber, "{mm}", &desc, &value ) == LBER_ERROR ) {
  79 #ifdef NEW_LOGGING
  80                 LDAP_LOG( OPERATION, ERR,
  81                         "do_compare: conn %d  get ava failed\n", op->o_connid, 0, 0 );
  82 #else
  83                 Debug( LDAP_DEBUG_ANY, "do_compare: get ava failed\n", 0, 0, 0 );
  84 #endif
  85                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
  86                 return SLAPD_DISCONNECT;
  87         }
  88
  89         if ( ber_scanf( op->o_ber, /*{*/ "}" ) == LBER_ERROR ) {
  90 #ifdef NEW_LOGGING
  91                 LDAP_LOG( OPERATION, ERR,
  92                         "do_compare: conn %d  ber_scanf failed\n", op->o_connid, 0, 0 );
  93 #else
  94                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  95 #endif
  96                 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
  97                 return SLAPD_DISCONNECT;
  98         }
  99
 100         if( get_ctrls( op, rs, 1 ) != LDAP_SUCCESS ) {
 101 #ifdef NEW_LOGGING
 102                 LDAP_LOG( OPERATION, INFO,
 103                         "do_compare: conn %d  get_ctrls failed\n", op->o_connid, 0, 0 );
 104 #else
 105                 Debug( LDAP_DEBUG_ANY, "do_compare: get_ctrls failed\n", 0, 0, 0 );
 106 #endif
 107                 goto cleanup;
 108         }
 109
 110         rs->sr_err = dnPrettyNormal( NULL, &dn, &op->o_req_dn, &op->o_req_ndn, op->o_tmpmemctx );
 111         if( rs->sr_err != LDAP_SUCCESS ) {
 112 #ifdef NEW_LOGGING
 113                 LDAP_LOG( OPERATION, INFO,
 114                         "do_compare: conn %d  invalid dn (%s)\n",
 115                         op->o_connid, dn.bv_val, 0 );
 116 #else
 117                 Debug( LDAP_DEBUG_ANY,
 118                         "do_compare: invalid dn (%s)\n", dn.bv_val, 0, 0 );
 119 #endif
 120                 send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid DN" );
 121                 goto cleanup;
 122         }
 123
 124         rs->sr_err = slap_bv2ad( &desc, &ava.aa_desc, &rs->sr_text );
 125         if( rs->sr_err != LDAP_SUCCESS ) {
 126                 send_ldap_result( op, rs );
 127                 goto cleanup;
 128         }
 129
 130         rs->sr_err = asserted_value_validate_normalize( ava.aa_desc,
 131                 ava.aa_desc->ad_type->sat_equality,
 132                 SLAP_MR_EQUALITY|SLAP_MR_VALUE_OF_ASSERTION_SYNTAX,
 133                 &value, &ava.aa_value, &rs->sr_text, op->o_tmpmemctx );
 134         if( rs->sr_err != LDAP_SUCCESS ) {
 135                 send_ldap_result( op, rs );
 136                 goto cleanup;
 137         }
 138
 139         if( strcasecmp( op->o_req_ndn.bv_val, LDAP_ROOT_DSE ) == 0 ) {
 140 #ifdef NEW_LOGGING
 141                 LDAP_LOG( OPERATION, ARGS,
 142                         "do_compare: dn (%s) attr(%s) value (%s)\n",
 143                         op->o_req_dn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 144 #else
 145                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 146                         op->o_req_dn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 147 #endif
 148
 149                 Statslog( LDAP_DEBUG_STATS,
 150                         "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 151                         op->o_connid, op->o_opid, op->o_req_dn.bv_val,
 152                         ava.aa_desc->ad_cname.bv_val, 0 );
 153
 154                 if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
 155                         send_ldap_result( op, rs );
 156                         goto cleanup;
 157                 }
 158
 159                 rs->sr_err = root_dse_info( op->o_conn, &entry, &rs->sr_text );
 160                 if( rs->sr_err != LDAP_SUCCESS ) {
 161                         send_ldap_result( op, rs );
 162                         goto cleanup;
 163                 }
 164
 165         } else if ( bvmatch( &op->o_req_ndn, &global_schemandn ) ) {
 166 #ifdef NEW_LOGGING
 167                 LDAP_LOG( OPERATION, ARGS,
 168                         "do_compare: dn (%s) attr(%s) value (%s)\n",
 169                         op->o_req_dn.bv_val, ava.aa_desc->ad_cname.bv_val,
 170                         ava.aa_value.bv_val );
 171 #else
 172                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 173                         op->o_req_dn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 174 #endif
 175
 176                 Statslog( LDAP_DEBUG_STATS,
 177                         "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 178                         op->o_connid, op->o_opid, op->o_req_dn.bv_val,
 179                         ava.aa_desc->ad_cname.bv_val, 0 );
 180
 181                 if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
 182                         send_ldap_result( op, rs );
 183                         rs->sr_err = 0;
 184                         goto cleanup;
 185                 }
 186
 187                 rs->sr_err = schema_info( &entry, &rs->sr_text );
 188                 if( rs->sr_err != LDAP_SUCCESS ) {
 189                         send_ldap_result( op, rs );
 190                         rs->sr_err = 0;
 191                         goto cleanup;
 192                 }
 193         }
 194
 195         if( entry ) {
 196                 rs->sr_err = compare_entry( op, entry, &ava );
 197                 entry_free( entry );
 198
 199                 send_ldap_result( op, rs );
 200
 201                 if( rs->sr_err == LDAP_COMPARE_TRUE || rs->sr_err == LDAP_COMPARE_FALSE ) {
 202                         rs->sr_err = 0;
 203                 }
 204
 205                 goto cleanup;
 206         }
 207
 208         manageDSAit = get_manageDSAit( op );
 209
 210         /*
 211          * We could be serving multiple database backends.  Select the
 212          * appropriate one, or send a referral to our "referral server"
 213          * if we don't hold it.
 214          */
 215         if ( (op->o_bd = select_backend( &op->o_req_ndn, manageDSAit, 0 )) == NULL ) {
 216                 rs->sr_ref = referral_rewrite( default_referral,
 217                         NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 218
 219                 rs->sr_err = LDAP_REFERRAL;
 220                 if (!rs->sr_ref) rs->sr_ref = default_referral;
 221                 send_ldap_result( op, rs );
 222
 223                 if (rs->sr_ref != default_referral) ber_bvarray_free( rs->sr_ref );
 224                 rs->sr_err = 0;
 225                 goto cleanup;
 226         }
 227
 228         /* check restrictions */
 229         if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
 230                 send_ldap_result( op, rs );
 231                 goto cleanup;
 232         }
 233
 234         /* check for referrals */
 235         if( backend_check_referrals( op, rs ) != LDAP_SUCCESS ) {
 236                 goto cleanup;
 237         }
 238
 239 #ifdef NEW_LOGGING
 240         LDAP_LOG( OPERATION, ARGS,
 241                 "do_compare: dn (%s) attr(%s) value (%s)\n",
 242                 op->o_req_dn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 243 #else
 244         Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 245             op->o_req_dn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 246 #endif
 247
 248         Statslog( LDAP_DEBUG_STATS, "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 249             op->o_connid, op->o_opid, op->o_req_dn.bv_val,
 250                 ava.aa_desc->ad_cname.bv_val, 0 );
 251
 252 #if defined( LDAP_SLAPI )
 253 #define pb      op->o_pb
 254         if ( pb ) {
 255                 slapi_x_pblock_set_operation( pb, op );
 256                 slapi_pblock_set( pb, SLAPI_COMPARE_TARGET, (void *)dn.bv_val );
 257                 slapi_pblock_set( pb, SLAPI_MANAGEDSAIT, (void *)manageDSAit );
 258                 slapi_pblock_set( pb, SLAPI_COMPARE_TYPE, (void *)desc.bv_val );
 259                 slapi_pblock_set( pb, SLAPI_COMPARE_VALUE, (void *)&value );
 260
 261                 rs->sr_err = doPluginFNs( op->o_bd, SLAPI_PLUGIN_PRE_COMPARE_FN, pb );
 262                 if ( rs->sr_err < 0 ) {
 263                         /*
 264                          * A preoperation plugin failure will abort the
 265                          * entire operation.
 266                          */
 267 #ifdef NEW_LOGGING
 268                         LDAP_LOG( OPERATION, INFO, "do_compare: compare preoperation plugin "
 269                                         "failed\n", 0, 0, 0);
 270 #else
 271                         Debug(LDAP_DEBUG_TRACE, "do_compare: compare preoperation plugin "
 272                                         "failed.\n", 0, 0, 0);
 273 #endif
 274                         if ( ( slapi_pblock_get( op->o_pb, SLAPI_RESULT_CODE, (void *)&rs->sr_err ) != 0 )  ||
 275                                  rs->sr_err == LDAP_SUCCESS ) {
 276                                 rs->sr_err = LDAP_OTHER;
 277                         }
 278                         goto cleanup;
 279                 }
 280         }
 281 #endif /* defined( LDAP_SLAPI ) */
 282
 283         if ( op->o_bd->be_compare ) {
 284                 op->orc_ava = &ava;
 285                 op->o_bd->be_compare( op, rs );
 286         } else {
 287                 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
 288                         "operation not supported within namingContext" );
 289         }
 290
 291 #if defined( LDAP_SLAPI )
 292         if ( pb && doPluginFNs( op->o_bd, SLAPI_PLUGIN_POST_COMPARE_FN, pb ) < 0 ) {
 293 #ifdef NEW_LOGGING
 294                 LDAP_LOG( OPERATION, INFO, "do_compare: compare postoperation plugins "
 295                                 "failed\n", 0, 0, 0 );
 296 #else
 297                 Debug(LDAP_DEBUG_TRACE, "do_compare: compare postoperation plugins "
 298                                 "failed.\n", 0, 0, 0);
 299 #endif
 300         }
 301 #endif /* defined( LDAP_SLAPI ) */
 302
 303 cleanup:
 304         op->o_tmpfree( op->o_req_dn.bv_val, op->o_tmpmemctx );
 305         op->o_tmpfree( op->o_req_ndn.bv_val, op->o_tmpmemctx );
 306         if ( ava.aa_value.bv_val ) op->o_tmpfree( ava.aa_value.bv_val, op->o_tmpmemctx );
 307
 308         return rs->sr_err;
 309 }
 310
 311 static int compare_entry(
 312         Operation *op,
 313         Entry *e,
 314         AttributeAssertion *ava )
 315 {
 316         int rc = LDAP_NO_SUCH_ATTRIBUTE;
 317         Attribute *a;
 318
 319         if ( ! access_allowed( op, e,
 320                 ava->aa_desc, &ava->aa_value, ACL_COMPARE, NULL ) )
 321         {
 322                 return LDAP_INSUFFICIENT_ACCESS;
 323         }
 324
 325         for(a = attrs_find( e->e_attrs, ava->aa_desc );
 326                 a != NULL;
 327                 a = attrs_find( a->a_next, ava->aa_desc ))
 328         {
 329                 rc = LDAP_COMPARE_FALSE;
 330
 331                 if ( value_find_ex( ava->aa_desc,
 332                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
 333                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
 334                         a->a_nvals,
 335                         &ava->aa_value, op->o_tmpmemctx ) == 0 )
 336                 {
 337                         rc = LDAP_COMPARE_TRUE;
 338                         break;
 339                 }
 340         }
 341
 342         return rc;
 343 }