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632 lines
14 KiB
C
632 lines
14 KiB
C
/* search.c - ldap backend search function */
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/* $OpenLDAP$ */
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/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
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*
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* Copyright 1999-2004 The OpenLDAP Foundation.
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* Portions Copyright 1999-2003 Howard Chu.
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* Portions Copyright 2000-2003 Pierangelo Masarati.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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/* ACKNOWLEDGEMENTS:
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* This work was initially developed by the Howard Chu for inclusion
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* in OpenLDAP Software and subsequently enhanced by Pierangelo
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* Masarati.
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/socket.h>
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#include <ac/string.h>
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#include <ac/time.h>
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#include "slap.h"
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#include "back-ldap.h"
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#undef ldap_debug /* silence a warning in ldap-int.h */
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#include "../../../libraries/libldap/ldap-int.h"
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#include "lutil.h"
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static int
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ldap_build_entry( Operation *op, LDAPMessage *e, Entry *ent,
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struct berval *bdn, int flags );
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#define LDAP_BUILD_ENTRY_PRIVATE 0x01
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static struct berval dummy = BER_BVNULL;
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int
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ldap_back_search(
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Operation *op,
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SlapReply *rs )
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{
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struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
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struct ldapconn *lc;
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struct timeval tv;
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LDAPMessage *res, *e;
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int rc = 0, msgid;
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struct berval match = BER_BVNULL;
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char **mapped_attrs = NULL;
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struct berval mbase;
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struct berval mfilter = BER_BVNULL;
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int dontfreetext = 0;
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dncookie dc;
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LDAPControl **ctrls = NULL;
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lc = ldap_back_getconn(op, rs);
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if ( !lc ) {
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return( -1 );
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}
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/*
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* FIXME: in case of values return filter, we might want
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* to map attrs and maybe rewrite value
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*/
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if ( !ldap_back_dobind( lc, op, rs ) ) {
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return( -1 );
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}
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/* should we check return values? */
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if (op->ors_deref != -1)
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ldap_set_option( lc->ld, LDAP_OPT_DEREF, (void *)&op->ors_deref);
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if (op->ors_tlimit != SLAP_NO_LIMIT) {
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tv.tv_sec = op->ors_tlimit;
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tv.tv_usec = 0;
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} else {
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tv.tv_sec = 0;
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}
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/*
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* Rewrite the search base, if required
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*/
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dc.rwmap = &li->rwmap;
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#ifdef ENABLE_REWRITE
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dc.conn = op->o_conn;
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dc.rs = rs;
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dc.ctx = "searchBase";
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#else
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dc.tofrom = 1;
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dc.normalized = 0;
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#endif
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if ( ldap_back_dn_massage( &dc, &op->o_req_ndn, &mbase ) ) {
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send_ldap_result( op, rs );
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return -1;
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}
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rc = ldap_back_filter_map_rewrite( &dc, op->ors_filter,
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&mfilter, BACKLDAP_MAP );
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switch ( rc ) {
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case LDAP_SUCCESS:
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break;
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case LDAP_COMPARE_FALSE:
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rs->sr_err = LDAP_SUCCESS;
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rs->sr_text = NULL;
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rc = 0;
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goto finish;
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default:
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rs->sr_err = LDAP_OTHER;
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rs->sr_text = "Rewrite error";
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dontfreetext = 1;
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rc = -1;
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goto finish;
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}
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rs->sr_err = ldap_back_map_attrs( &li->rwmap.rwm_at,
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op->ors_attrs,
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BACKLDAP_MAP, &mapped_attrs );
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if ( rs->sr_err ) {
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rc = -1;
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goto finish;
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}
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ctrls = op->o_ctrls;
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#ifdef LDAP_BACK_PROXY_AUTHZ
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rc = ldap_back_proxy_authz_ctrl( lc, op, rs, &ctrls );
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if ( rc != LDAP_SUCCESS ) {
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dontfreetext = 1;
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goto finish;
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}
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#endif /* LDAP_BACK_PROXY_AUTHZ */
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rs->sr_err = ldap_search_ext(lc->ld, mbase.bv_val,
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op->ors_scope, mfilter.bv_val,
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mapped_attrs, op->ors_attrsonly,
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ctrls, NULL,
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tv.tv_sec ? &tv : NULL, op->ors_slimit,
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&msgid );
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if ( rs->sr_err != LDAP_SUCCESS ) {
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fail:;
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rc = ldap_back_op_result(lc, op, rs, msgid, 0);
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goto finish;
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}
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/* We pull apart the ber result, stuff it into a slapd entry, and
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* let send_search_entry stuff it back into ber format. Slow & ugly,
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* but this is necessary for version matching, and for ACL processing.
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*/
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for ( rc=0; rc != -1; rc = ldap_result(lc->ld, msgid, 0, &tv, &res))
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{
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/* check for abandon */
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if (op->o_abandon) {
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ldap_abandon(lc->ld, msgid);
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rc = 0;
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goto finish;
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}
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if (rc == 0) {
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tv.tv_sec = 0;
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tv.tv_usec = 100000;
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ldap_pvt_thread_yield();
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} else if (rc == LDAP_RES_SEARCH_ENTRY) {
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Entry ent = {0};
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struct berval bdn;
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int abort = 0;
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e = ldap_first_entry(lc->ld,res);
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if ( ( rc = ldap_build_entry(op, e, &ent, &bdn,
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LDAP_BUILD_ENTRY_PRIVATE)) == LDAP_SUCCESS ) {
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rs->sr_entry = &ent;
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rs->sr_attrs = op->ors_attrs;
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rs->sr_flags = 0;
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abort = send_search_entry( op, rs );
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while (ent.e_attrs) {
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Attribute *a;
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BerVarray v;
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a = ent.e_attrs;
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ent.e_attrs = a->a_next;
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v = a->a_vals;
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if (a->a_vals != &dummy)
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ber_bvarray_free(a->a_vals);
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if (a->a_nvals != v)
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ber_bvarray_free(a->a_nvals);
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ch_free(a);
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}
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if ( ent.e_dn && ( ent.e_dn != bdn.bv_val ) )
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free( ent.e_dn );
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if ( ent.e_ndn )
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free( ent.e_ndn );
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}
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ldap_msgfree(res);
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if ( abort ) {
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ldap_abandon(lc->ld, msgid);
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goto finish;
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}
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} else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
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char **references = NULL;
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int cnt;
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rc = ldap_parse_reference( lc->ld, res,
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&references, &rs->sr_ctrls, 1 );
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if ( rc != LDAP_SUCCESS ) {
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continue;
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}
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if ( references == NULL ) {
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continue;
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}
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for ( cnt = 0; references[ cnt ]; cnt++ )
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/* NO OP */ ;
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rs->sr_ref = ch_calloc( cnt + 1, sizeof( struct berval ) );
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for ( cnt = 0; references[ cnt ]; cnt++ ) {
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rs->sr_ref[ cnt ].bv_val = references[ cnt ];
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rs->sr_ref[ cnt ].bv_len = strlen( references[ cnt ] );
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}
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/* ignore return value by now */
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( void )send_search_reference( op, rs );
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/* cleanup */
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if ( references ) {
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ldap_value_free( references );
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ch_free( rs->sr_ref );
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rs->sr_ref = NULL;
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}
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if ( rs->sr_ctrls ) {
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ldap_controls_free( rs->sr_ctrls );
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rs->sr_ctrls = NULL;
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}
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} else {
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rc = ldap_parse_result(lc->ld, res, &rs->sr_err,
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&match.bv_val, (char **)&rs->sr_text,
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NULL, NULL, 1);
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if (rc != LDAP_SUCCESS ) rs->sr_err = rc;
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rs->sr_err = slap_map_api2result( rs );
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rc = 0;
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break;
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}
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}
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if (rc == -1)
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goto fail;
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/*
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* Rewrite the matched portion of the search base, if required
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*/
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if ( match.bv_val && *match.bv_val ) {
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struct berval mdn;
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#ifdef ENABLE_REWRITE
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dc.ctx = "matchedDN";
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#else
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dc.tofrom = 0;
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dc.normalized = 0;
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#endif
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match.bv_len = strlen( match.bv_val );
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ldap_back_dn_massage(&dc, &match, &mdn);
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rs->sr_matched = mdn.bv_val;
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}
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if ( rs->sr_v2ref ) {
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rs->sr_err = LDAP_REFERRAL;
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}
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finish:;
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send_ldap_result( op, rs );
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#ifdef LDAP_BACK_PROXY_AUTHZ
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if ( ctrls && ctrls != op->o_ctrls ) {
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free( ctrls[ 0 ] );
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free( ctrls );
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}
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#endif /* LDAP_BACK_PROXY_AUTHZ */
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if ( match.bv_val ) {
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if ( rs->sr_matched != match.bv_val ) {
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free( (char *)rs->sr_matched );
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}
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rs->sr_matched = NULL;
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LDAP_FREE( match.bv_val );
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}
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if ( rs->sr_text ) {
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if ( !dontfreetext ) {
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LDAP_FREE( (char *)rs->sr_text );
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}
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rs->sr_text = NULL;
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}
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if ( mapped_attrs ) {
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ch_free( mapped_attrs );
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}
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if ( mfilter.bv_val != op->ors_filterstr.bv_val ) {
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ch_free( mfilter.bv_val );
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}
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if ( mbase.bv_val != op->o_req_ndn.bv_val ) {
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free( mbase.bv_val );
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}
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return rc;
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}
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static int
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ldap_build_entry(
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Operation *op,
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LDAPMessage *e,
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Entry *ent,
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struct berval *bdn,
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int flags
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)
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{
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struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
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struct berval a, mapped;
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BerElement ber = *e->lm_ber;
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Attribute *attr, **attrp;
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struct berval *bv;
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const char *text;
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int last;
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int private = flags & LDAP_BUILD_ENTRY_PRIVATE;
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dncookie dc;
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/* safe assumptions ... */
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assert( ent );
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ent->e_bv.bv_val = NULL;
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if ( ber_scanf( &ber, "{m{", bdn ) == LBER_ERROR ) {
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return LDAP_DECODING_ERROR;
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}
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/*
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* Rewrite the dn of the result, if needed
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*/
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dc.rwmap = &li->rwmap;
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#ifdef ENABLE_REWRITE
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dc.conn = op->o_conn;
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dc.rs = NULL;
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dc.ctx = "searchResult";
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#else
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dc.tofrom = 0;
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dc.normalized = 0;
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#endif
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if ( ldap_back_dn_massage( &dc, bdn, &ent->e_name ) ) {
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return LDAP_OTHER;
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}
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/*
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* Note: this may fail if the target host(s) schema differs
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* from the one known to the meta, and a DN with unknown
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* attributes is returned.
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*
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* FIXME: should we log anything, or delegate to dnNormalize?
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*/
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/* Note: if the distinguished values or the naming attributes
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* change, should we massage them as well?
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*/
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if ( dnNormalize( 0, NULL, NULL, &ent->e_name, &ent->e_nname,
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op->o_tmpmemctx ) != LDAP_SUCCESS )
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{
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return LDAP_INVALID_DN_SYNTAX;
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}
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attrp = &ent->e_attrs;
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#ifdef ENABLE_REWRITE
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dc.ctx = "searchAttrDN";
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#endif
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while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
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ldap_back_map(&li->rwmap.rwm_at, &a, &mapped, BACKLDAP_REMAP);
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if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0')
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continue;
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attr = (Attribute *)ch_malloc( sizeof(Attribute) );
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if (attr == NULL)
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continue;
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attr->a_flags = 0;
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attr->a_next = 0;
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attr->a_desc = NULL;
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if (slap_bv2ad(&mapped, &attr->a_desc, &text) != LDAP_SUCCESS) {
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if (slap_bv2undef_ad(&mapped, &attr->a_desc, &text)
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!= LDAP_SUCCESS) {
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#ifdef NEW_LOGGING
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LDAP_LOG( BACK_LDAP, DETAIL1,
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"slap_bv2undef_ad(%s): %s\n", mapped.bv_val, text, 0 );
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#else /* !NEW_LOGGING */
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Debug( LDAP_DEBUG_ANY,
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"slap_bv2undef_ad(%s): "
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"%s\n%s", mapped.bv_val, text, "" );
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#endif /* !NEW_LOGGING */
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ch_free(attr);
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continue;
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}
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}
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/* no subschemaSubentry */
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if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) {
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/*
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* We eat target's subschemaSubentry because
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* a search for this value is likely not
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* to resolve to the appropriate backend;
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* later, the local subschemaSubentry is
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* added.
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*/
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( void )ber_scanf( &ber, "x" /* [W] */ );
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ch_free(attr);
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continue;
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}
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if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
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|| attr->a_vals == NULL ) {
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/*
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* Note: attr->a_vals can be null when using
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* values result filter
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*/
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if (private) {
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attr->a_vals = &dummy;
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} else {
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attr->a_vals = ch_malloc(sizeof(struct berval));
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attr->a_vals->bv_val = NULL;
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attr->a_vals->bv_len = 0;
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}
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last = 0;
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} else {
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for ( last = 0; attr->a_vals[last].bv_val; last++ );
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}
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if ( last == 0 ) {
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/* empty */
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} else if ( attr->a_desc == slap_schema.si_ad_objectClass
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|| attr->a_desc == slap_schema.si_ad_structuralObjectClass ) {
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for ( bv = attr->a_vals; bv->bv_val; bv++ ) {
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ldap_back_map(&li->rwmap.rwm_oc, bv, &mapped,
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BACKLDAP_REMAP);
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if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0') {
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LBER_FREE(bv->bv_val);
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bv->bv_val = NULL;
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if (--last < 0)
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break;
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*bv = attr->a_vals[last];
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attr->a_vals[last].bv_val = NULL;
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bv--;
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} else if ( mapped.bv_val != bv->bv_val ) {
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/*
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* FIXME: after LBER_FREEing
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* the value is replaced by
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* ch_alloc'ed memory
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*/
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LBER_FREE(bv->bv_val);
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ber_dupbv( bv, &mapped );
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}
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}
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/*
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* It is necessary to try to rewrite attributes with
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* dn syntax because they might be used in ACLs as
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* members of groups; since ACLs are applied to the
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* rewritten stuff, no dn-based subject clause could
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* be used at the ldap backend side (see
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* http://www.OpenLDAP.org/faq/data/cache/452.html)
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* The problem can be overcome by moving the dn-based
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* ACLs to the target directory server, and letting
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* everything pass thru the ldap backend.
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*/
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} else if ( attr->a_desc->ad_type->sat_syntax ==
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slap_schema.si_syn_distinguishedName ) {
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ldap_dnattr_result_rewrite( &dc, attr->a_vals );
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}
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if ( last && attr->a_desc->ad_type->sat_equality &&
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attr->a_desc->ad_type->sat_equality->smr_normalize ) {
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int i;
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attr->a_nvals = ch_malloc((last+1)*sizeof(struct berval));
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for (i=0; i<last; i++) {
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attr->a_desc->ad_type->sat_equality->smr_normalize(
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SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
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attr->a_desc->ad_type->sat_syntax,
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attr->a_desc->ad_type->sat_equality,
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&attr->a_vals[i], &attr->a_nvals[i],
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NULL /* op->o_tmpmemctx */ );
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}
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attr->a_nvals[i].bv_val = NULL;
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attr->a_nvals[i].bv_len = 0;
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} else {
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attr->a_nvals = attr->a_vals;
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}
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*attrp = attr;
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attrp = &attr->a_next;
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}
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/* make sure it's free'able */
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if (!private && ent->e_name.bv_val == bdn->bv_val)
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ber_dupbv( &ent->e_name, bdn );
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return LDAP_SUCCESS;
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|
}
|
|
|
|
/* return 0 IFF we can retrieve the entry with ndn
|
|
*/
|
|
int
|
|
ldap_back_entry_get(
|
|
Operation *op,
|
|
struct berval *ndn,
|
|
ObjectClass *oc,
|
|
AttributeDescription *at,
|
|
int rw,
|
|
Entry **ent
|
|
)
|
|
{
|
|
struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
|
|
struct ldapconn *lc;
|
|
int rc = 1, is_oc;
|
|
struct berval mapped = BER_BVNULL, bdn, mdn;
|
|
LDAPMessage *result = NULL, *e = NULL;
|
|
char *gattr[3];
|
|
char *filter = NULL;
|
|
Connection *oconn;
|
|
SlapReply rs;
|
|
dncookie dc;
|
|
|
|
/* Tell getconn this is a privileged op */
|
|
is_oc = op->o_do_not_cache;
|
|
op->o_do_not_cache = 1;
|
|
lc = ldap_back_getconn(op, &rs);
|
|
oconn = op->o_conn;
|
|
op->o_conn = NULL;
|
|
if ( !lc || !ldap_back_dobind(lc, op, &rs) ) {
|
|
op->o_do_not_cache = is_oc;
|
|
op->o_conn = oconn;
|
|
return 1;
|
|
}
|
|
op->o_do_not_cache = is_oc;
|
|
op->o_conn = oconn;
|
|
|
|
/*
|
|
* Rewrite the search base, if required
|
|
*/
|
|
dc.rwmap = &li->rwmap;
|
|
#ifdef ENABLE_REWRITE
|
|
dc.conn = op->o_conn;
|
|
dc.rs = &rs;
|
|
dc.ctx = "searchBase";
|
|
#else
|
|
dc.tofrom = 1;
|
|
dc.normalized = 1;
|
|
#endif
|
|
if ( ldap_back_dn_massage( &dc, ndn, &mdn ) ) {
|
|
return 1;
|
|
}
|
|
|
|
if ( at ) {
|
|
ldap_back_map(&li->rwmap.rwm_at, &at->ad_cname, &mapped, BACKLDAP_MAP);
|
|
if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0') {
|
|
rc = 1;
|
|
goto cleanup;
|
|
}
|
|
is_oc = (strcasecmp("objectclass", mapped.bv_val) == 0);
|
|
if (oc && !is_oc) {
|
|
gattr[0] = "objectclass";
|
|
gattr[1] = mapped.bv_val;
|
|
gattr[2] = NULL;
|
|
} else {
|
|
gattr[0] = mapped.bv_val;
|
|
gattr[1] = NULL;
|
|
}
|
|
}
|
|
|
|
if (oc) {
|
|
char *ptr;
|
|
ldap_back_map(&li->rwmap.rwm_oc, &oc->soc_cname, &mapped,
|
|
BACKLDAP_MAP);
|
|
filter = ch_malloc(sizeof("(objectclass=)") + mapped.bv_len);
|
|
ptr = lutil_strcopy(filter, "(objectclass=");
|
|
ptr = lutil_strcopy(ptr, mapped.bv_val);
|
|
*ptr++ = ')';
|
|
*ptr++ = '\0';
|
|
}
|
|
|
|
if (ldap_search_ext_s(lc->ld, mdn.bv_val, LDAP_SCOPE_BASE, filter,
|
|
gattr, 0, NULL, NULL, LDAP_NO_LIMIT,
|
|
LDAP_NO_LIMIT, &result) != LDAP_SUCCESS)
|
|
{
|
|
goto cleanup;
|
|
}
|
|
|
|
if ((e = ldap_first_entry(lc->ld, result)) == NULL) {
|
|
goto cleanup;
|
|
}
|
|
|
|
*ent = ch_calloc(1,sizeof(Entry));
|
|
|
|
rc = ldap_build_entry(op, e, *ent, &bdn, 0);
|
|
|
|
if (rc != LDAP_SUCCESS) {
|
|
ch_free(*ent);
|
|
*ent = NULL;
|
|
}
|
|
|
|
cleanup:
|
|
if (result) {
|
|
ldap_msgfree(result);
|
|
}
|
|
|
|
if ( filter ) {
|
|
ch_free( filter );
|
|
}
|
|
|
|
if ( mdn.bv_val != ndn->bv_val ) {
|
|
ch_free( mdn.bv_val );
|
|
}
|
|
|
|
return(rc);
|
|
}
|
|
|