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527 lines
12 KiB
C
527 lines
12 KiB
C
/* $OpenLDAP$ */
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/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
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*
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* Copyright 1999-2005 The OpenLDAP Foundation.
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* Portions Copyright 2001-2003 Pierangelo Masarati.
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* Portions Copyright 1999-2003 Howard Chu.
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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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#define AVL_INTERNAL
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#include "slap.h"
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#include "../back-ldap/back-ldap.h"
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#include "back-meta.h"
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static LDAP_REBIND_PROC meta_back_rebind;
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static int
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meta_back_do_single_bind(
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struct metaconn *lc,
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Operation *op,
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SlapReply *rs,
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int candidate
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);
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int
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meta_back_bind( Operation *op, SlapReply *rs )
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{
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struct metainfo *li = ( struct metainfo * )op->o_bd->be_private;
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struct metaconn *lc;
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int rc = -1, i, gotit = 0, ndnlen, isroot = 0;
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int op_type = META_OP_ALLOW_MULTIPLE;
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rs->sr_err = LDAP_SUCCESS;
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Debug( LDAP_DEBUG_ARGS, "meta_back_bind: dn: %s.\n%s%s",
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op->o_req_dn.bv_val, "", "" );
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if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
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isroot = 1;
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ber_dupbv( &op->orb_edn, be_root_dn( op->o_bd ) );
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op_type = META_OP_REQUIRE_ALL;
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}
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lc = meta_back_getconn( op, rs, op_type,
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&op->o_req_ndn, NULL, LDAP_BACK_SENDERR );
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if ( !lc ) {
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Debug( LDAP_DEBUG_ANY,
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"meta_back_bind: no target for dn %s.\n%s%s",
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op->o_req_dn.bv_val, "", "");
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send_ldap_result( op, rs );
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return -1;
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}
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/*
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* Each target is scanned ...
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*/
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lc->mc_bound_target = META_BOUND_NONE;
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ndnlen = op->o_req_ndn.bv_len;
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for ( i = 0; i < li->ntargets; i++ ) {
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int lerr;
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struct berval orig_dn = op->o_req_dn;
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struct berval orig_ndn = op->o_req_ndn;
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struct berval orig_cred = op->orb_cred;
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int orig_method = op->orb_method;
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/*
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* Skip non-candidates
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*/
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if ( lc->mc_conns[ i ].msc_candidate != META_CANDIDATE ) {
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continue;
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}
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if ( gotit == 0 ) {
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gotit = 1;
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} else {
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/*
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* A bind operation is expected to have
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* ONE CANDIDATE ONLY!
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*/
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Debug( LDAP_DEBUG_ANY,
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"==>meta_back_bind: more than one"
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" candidate is attempting to bind"
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" ...\n%s%s%s",
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"", "", "" );
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}
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if ( isroot && li->targets[ i ]->mt_pseudorootdn.bv_val != NULL ) {
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op->o_req_dn = li->targets[ i ]->mt_pseudorootdn;
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op->o_req_ndn = li->targets[ i ]->mt_pseudorootdn;
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op->orb_cred = li->targets[ i ]->mt_pseudorootpw;
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op->orb_method = LDAP_AUTH_SIMPLE;
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}
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lerr = meta_back_do_single_bind( lc, op, rs, i );
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if ( lerr != LDAP_SUCCESS ) {
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rs->sr_err = lerr;
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( void )meta_clear_one_candidate( &lc->mc_conns[ i ], 1 );
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} else {
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rc = LDAP_SUCCESS;
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}
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op->o_req_dn = orig_dn;
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op->o_req_ndn = orig_ndn;
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op->orb_cred = orig_cred;
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op->orb_method = orig_method;
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}
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if ( isroot ) {
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lc->mc_bound_target = META_BOUND_ALL;
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}
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/*
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* rc is LDAP_SUCCESS if at least one bind succeeded,
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* err is the last error that occurred during a bind;
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* if at least (and at most?) one bind succeedes, fine.
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*/
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if ( rc != LDAP_SUCCESS /* && rs->sr_err != LDAP_SUCCESS */ ) {
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/*
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* deal with bind failure ...
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*/
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/*
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* no target was found within the naming context,
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* so bind must fail with invalid credentials
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*/
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if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
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rs->sr_err = LDAP_INVALID_CREDENTIALS;
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}
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rs->sr_err = slap_map_api2result( rs );
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send_ldap_result( op, rs );
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return -1;
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}
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return 0;
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}
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/*
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* meta_back_do_single_bind
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*
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* attempts to perform a bind with creds
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*/
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static int
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meta_back_do_single_bind(
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struct metaconn *lc,
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Operation *op,
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SlapReply *rs,
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int candidate
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)
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{
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struct metainfo *li = ( struct metainfo * )op->o_bd->be_private;
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struct berval mdn = BER_BVNULL;
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dncookie dc;
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struct metasingleconn *lsc = &lc->mc_conns[ candidate ];
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int msgid;
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/*
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* Rewrite the bind dn if needed
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*/
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dc.rwmap = &li->targets[ candidate ]->mt_rwmap;
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dc.conn = op->o_conn;
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dc.rs = rs;
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dc.ctx = "bindDN";
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if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
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send_ldap_result( op, rs );
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return -1;
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}
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/* FIXME: this fixes the bind problem right now; we need
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* to use the asynchronous version to get the "matched"
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* and more in case of failure ... */
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/* FIXME: should be check if at least some of the op->o_ctrls
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* can/should be passed? */
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rs->sr_err = ldap_sasl_bind( lsc->msc_ld, mdn.bv_val,
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LDAP_SASL_SIMPLE, &op->orb_cred,
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op->o_ctrls, NULL, &msgid );
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if ( rs->sr_err == LDAP_SUCCESS ) {
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LDAPMessage *res;
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struct timeval tv = { 0, 0 };
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int rc;
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int nretries = 0;
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/*
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* handle response!!!
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*/
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retry:;
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switch ( ldap_result( lsc->msc_ld, msgid, 0, &tv, &res ) ) {
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case 0:
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if ( ++nretries <= META_BIND_NRETRIES ) {
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ldap_pvt_thread_yield();
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tv.tv_sec = 0;
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tv.tv_usec = META_BIND_TIMEOUT;
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goto retry;
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}
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rs->sr_err = LDAP_BUSY;
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break;
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case -1:
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ldap_get_option( lsc->msc_ld, LDAP_OPT_ERROR_NUMBER,
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&rs->sr_err );
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break;
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default:
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rc = ldap_parse_result( lsc->msc_ld, res, &rs->sr_err,
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NULL, NULL, NULL, NULL, 1 );
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if ( rc != LDAP_SUCCESS ) {
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rs->sr_err = rc;
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}
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break;
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}
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}
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if ( rs->sr_err != LDAP_SUCCESS ) {
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rs->sr_err = slap_map_api2result( rs );
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goto return_results;
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}
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if ( !BER_BVISNULL( &lsc->msc_bound_ndn ) ) {
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ber_memfree( lsc->msc_bound_ndn.bv_val );
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}
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ber_dupbv( &lsc->msc_bound_ndn, &op->o_req_dn );
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lsc->msc_bound = META_BOUND;
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lc->mc_bound_target = candidate;
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if ( LDAP_BACK_SAVECRED( li ) ) {
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if ( !BER_BVISNULL( &lsc->msc_cred ) ) {
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/* destroy sensitive data */
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memset( lsc->msc_cred.bv_val, 0, lsc->msc_cred.bv_len );
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ber_memfree( lsc->msc_cred.bv_val );
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}
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ber_dupbv( &lsc->msc_cred, &op->orb_cred );
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ldap_set_rebind_proc( lsc->msc_ld, meta_back_rebind, lsc );
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}
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if ( li->cache.ttl != META_DNCACHE_DISABLED
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&& op->o_req_ndn.bv_len != 0 ) {
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( void )meta_dncache_update_entry( &li->cache,
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&op->o_req_ndn, candidate );
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}
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return_results:;
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if ( mdn.bv_val != op->o_req_dn.bv_val ) {
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free( mdn.bv_val );
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}
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return rs->sr_err;
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}
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/*
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* meta_back_dobind
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*/
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int
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meta_back_dobind( struct metaconn *lc, Operation *op, ldap_back_send_t sendok )
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{
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struct metasingleconn *lsc;
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int bound = 0, i;
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/*
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* all the targets are bound as pseudoroot
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*/
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if ( lc->mc_bound_target == META_BOUND_ALL ) {
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return 1;
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}
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for ( i = 0, lsc = lc->mc_conns; !META_LAST( lsc ); ++i, ++lsc ) {
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int rc;
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struct berval cred = BER_BVC("");
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int msgid;
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/*
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* Not a candidate or something wrong with this target ...
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*/
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if ( lsc->msc_ld == NULL ) {
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continue;
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}
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/*
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* If the target is already bound it is skipped
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*/
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if ( lsc->msc_bound == META_BOUND && lc->mc_bound_target == i ) {
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++bound;
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continue;
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}
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/*
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* Otherwise an anonymous bind is performed
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* (note: if the target was already bound, the anonymous
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* bind clears the previous bind).
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*/
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if ( !BER_BVISNULL( &lsc->msc_bound_ndn ) ) {
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ber_memfree( lsc->msc_bound_ndn.bv_val );
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BER_BVZERO( &lsc->msc_bound_ndn );
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}
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if ( /* FIXME: need li ... li->savecred && */
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!BER_BVISNULL( &lsc->msc_cred ) )
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{
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/* destroy sensitive data */
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memset( lsc->msc_cred.bv_val, 0, lsc->msc_cred.bv_len );
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ber_memfree( lsc->msc_cred.bv_val );
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BER_BVZERO( &lsc->msc_cred );
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}
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/* FIXME: should we check if at least some of the op->o_ctrls
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* can/should be passed? */
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rc = ldap_sasl_bind( lsc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
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NULL, NULL, &msgid );
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if ( rc == LDAP_SUCCESS ) {
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LDAPMessage *res;
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struct timeval tv = { 0, 0 };
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int err;
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int nretries = 0;
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/*
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* handle response!!!
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*/
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retry:;
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switch ( ldap_result( lsc->msc_ld, msgid, 0, &tv, &res ) ) {
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case 0:
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if ( ++nretries <= META_BIND_NRETRIES ) {
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ldap_pvt_thread_yield();
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tv.tv_sec = 0;
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tv.tv_usec = META_BIND_TIMEOUT;
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goto retry;
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}
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rc = LDAP_BUSY;
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break;
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case -1:
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ldap_get_option( lsc->msc_ld, LDAP_OPT_ERROR_NUMBER,
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&rc );
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break;
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default:
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rc = ldap_parse_result( lsc->msc_ld, res, &err,
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NULL, NULL, NULL, NULL, 1 );
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if ( rc == LDAP_SUCCESS ) {
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rc = err;
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}
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break;
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}
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}
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if ( rc != LDAP_SUCCESS ) {
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Debug( LDAP_DEBUG_ANY,
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"==>meta_back_dobind: (anonymous)"
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" bind failed"
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" with error %d (%s)\n",
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rc, ldap_err2string( rc ), 0 );
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/*
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* null cred bind should always succeed
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* as anonymous, so a failure means
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* the target is no longer candidate possibly
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* due to technical reasons (remote host down?)
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* so better clear the handle
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*/
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( void )meta_clear_one_candidate( lsc, 1 );
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continue;
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} /* else */
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lsc->msc_bound = META_ANONYMOUS;
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++bound;
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}
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return( bound > 0 );
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}
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/*
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*
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*/
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int
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meta_back_is_valid( struct metaconn *lc, int candidate )
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{
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struct metasingleconn *lsc;
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int i;
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assert( lc );
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if ( candidate < 0 ) {
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return 0;
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}
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for ( i = 0, lsc = lc->mc_conns; !META_LAST( lsc ) && i < candidate;
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++i, ++lsc );
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if ( !META_LAST( lsc ) ) {
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return ( lsc->msc_ld != NULL );
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}
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return 0;
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}
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/*
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* meta_back_rebind
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*
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* This is a callback used for chasing referrals using the same
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* credentials as the original user on this session.
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*/
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static int
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meta_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
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ber_int_t msgid, void *params )
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{
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struct metasingleconn *lsc = params;
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return ldap_sasl_bind_s( ld, lsc->msc_bound_ndn.bv_val,
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LDAP_SASL_SIMPLE, &lsc->msc_cred,
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NULL, NULL, NULL );
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}
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/*
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* FIXME: error return must be handled in a cleaner way ...
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*/
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int
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meta_back_op_result( struct metaconn *lc, Operation *op, SlapReply *rs )
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{
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int i,
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rerr = LDAP_SUCCESS;
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struct metasingleconn *lsc;
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char *rmsg = NULL;
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char *rmatch = NULL;
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int free_rmsg = 0,
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free_rmatch = 0;
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for ( i = 0, lsc = lc->mc_conns; !META_LAST( lsc ); ++i, ++lsc ) {
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char *msg = NULL;
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char *match = NULL;
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rs->sr_err = LDAP_SUCCESS;
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ldap_get_option( lsc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
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if ( rs->sr_err != LDAP_SUCCESS ) {
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/*
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* better check the type of error. In some cases
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* (search ?) it might be better to return a
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* success if at least one of the targets gave
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* positive result ...
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*/
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ldap_get_option( lsc->msc_ld,
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LDAP_OPT_ERROR_STRING, &msg );
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ldap_get_option( lsc->msc_ld,
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LDAP_OPT_MATCHED_DN, &match );
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rs->sr_err = slap_map_api2result( rs );
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Debug(LDAP_DEBUG_ANY,
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"==> meta_back_op_result: target"
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" <%d> sending msg \"%s\""
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" (matched \"%s\")\n",
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i, ( msg ? msg : "" ),
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( match ? match : "" ) );
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/*
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* FIXME: need to rewrite "match" (need rwinfo)
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*/
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switch ( rs->sr_err ) {
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default:
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rerr = rs->sr_err;
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if ( rmsg ) {
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ber_memfree( rmsg );
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}
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rmsg = msg;
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free_rmsg = 1;
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msg = NULL;
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if ( rmatch ) {
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ber_memfree( rmatch );
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}
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rmatch = match;
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free_rmatch = 1;
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match = NULL;
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break;
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}
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/* better test the pointers before freeing? */
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if ( match ) {
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free( match );
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}
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if ( msg ) {
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free( msg );
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}
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}
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}
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rs->sr_err = rerr;
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rs->sr_text = rmsg;
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rs->sr_matched = rmatch;
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send_ldap_result( op, rs );
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if ( free_rmsg ) {
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ber_memfree( rmsg );
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}
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if ( free_rmatch ) {
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ber_memfree( rmatch );
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}
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rs->sr_text = NULL;
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rs->sr_matched = NULL;
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return ( ( rerr == LDAP_SUCCESS ) ? 0 : -1 );
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}
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