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/** BEGIN COPYRIGHT BLOCK
* This Program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation; version 2 of the License.
*
* This Program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this Program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place, Suite 330, Boston, MA 02111-1307 USA.
*
* In addition, as a special exception, Red Hat, Inc. gives You the additional
* right to link the code of this Program with code not covered under the GNU
* General Public License ("Non-GPL Code") and to distribute linked combinations
* including the two, subject to the limitations in this paragraph. Non-GPL Code
* permitted under this exception must only link to the code of this Program
* through those well defined interfaces identified in the file named EXCEPTION
* found in the source code files (the "Approved Interfaces"). The files of
* Non-GPL Code may instantiate templates or use macros or inline functions from
* the Approved Interfaces without causing the resulting work to be covered by
* the GNU General Public License. Only Red Hat, Inc. may make changes or
* additions to the list of Approved Interfaces. You must obey the GNU General
* Public License in all respects for all of the Program code and other code used
* in conjunction with the Program except the Non-GPL Code covered by this
* exception. If you modify this file, you may extend this exception to your
* version of the file, but you are not obligated to do so. If you do not wish to
* provide this exception without modification, you must delete this exception
* statement from your version and license this file solely under the GPL without
* exception.
*
*
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "cb.h"
static void
cb_free_bervals( struct berval **bvs );
static int
cb_sasl_bind_once_s( cb_conn_pool *pool, const char *dn, int method,
char * mechanism, struct berval *creds,
LDAPControl **reqctrls, char **matcheddnp,
char **errmsgp, struct berval ***refurlsp,
LDAPControl ***resctrlsp , int * status);
/*
* Attempt to chain a bind request off to "srvr." We return an LDAP error
* code that indicates whether we successfully got a response from the
* other server or not. If we succeed, we return LDAP_SUCCESS and *lderrnop
* is set to the result code from the remote server.
*
* Note that in the face of "ldap server down" or "ldap connect failed" errors
* we make up to "tries" attempts to bind to the remote server. Since we
* are only interested in recovering silently when the remote server is up
* but decided to close our connection, we retry without pausing between
* attempts.
*/
static int
cb_sasl_bind_s(Slapi_PBlock * pb, cb_conn_pool *pool, int tries,
const char *dn, int method,char * mechanism,
struct berval *creds, LDAPControl **reqctrls,
char **matcheddnp, char **errmsgp, struct berval ***refurlsp,
LDAPControl ***resctrlsp ,int *status)
{
int rc;
do {
/* check to see if operation has been abandoned...*/
if (LDAP_AUTH_SIMPLE!=method)
return LDAP_AUTH_METHOD_NOT_SUPPORTED;
if ( slapi_op_abandoned( pb )) {
rc = LDAP_USER_CANCELLED;
} else {
rc = cb_sasl_bind_once_s( pool, dn, method,mechanism, creds, reqctrls,
matcheddnp, errmsgp, refurlsp, resctrlsp ,status);
}
} while ( CB_LDAP_CONN_ERROR( rc ) && --tries > 0 );
return( rc );
}
static int
cb_sasl_bind_once_s( cb_conn_pool *pool, const char *dn, int method,
char * mechanism, struct berval *creds,
LDAPControl **reqctrls, char **matcheddnp,
char **errmsgp, struct berval ***refurlsp,
LDAPControl ***resctrlsp , int * status )
{
int rc, msgid;
char **referrals;
struct timeval timeout_copy, *timeout;
LDAPMessage *result=NULL;
LDAP *ld=NULL;
char *cnxerrbuf=NULL;
cb_outgoing_conn *cnx;
int version=LDAP_VERSION3;
/* Grab an LDAP connection to use for this bind. */
slapi_rwlock_rdlock(pool->rwl_config_lock);
timeout_copy.tv_sec = pool->conn.bind_timeout.tv_sec;
timeout_copy.tv_usec = pool->conn.bind_timeout.tv_usec;
slapi_rwlock_unlock(pool->rwl_config_lock);
rc = cb_get_connection(pool, &ld, &cnx, NULL, &cnxerrbuf);
if (LDAP_SUCCESS != rc) {
static int warned_get_conn = 0;
if (!warned_get_conn) {
slapi_log_error(SLAPI_LOG_FATAL, CB_PLUGIN_SUBSYSTEM,
"cb_get_connection failed (%d) %s\n",
rc, ldap_err2string(rc));
warned_get_conn = 1;
}
*errmsgp = cnxerrbuf;
goto release_and_return;
}
/* Send the bind operation (need to retry on LDAP_SERVER_DOWN) */
ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, &version );
if (( rc = ldap_sasl_bind( ld, dn, LDAP_SASL_SIMPLE, creds, reqctrls,
NULL, &msgid )) != LDAP_SUCCESS ) {
goto release_and_return;
}
/* XXXSD what is the exact semantics of bind_to ? it is used to get a
connection handle and later to bind ==> bind op may last 2*bind_to
from the user point of view
confusion comes from teh fact that bind to is used 2for 3 differnt thinks,
*/
/*
* determine timeout value (how long we will wait for a response)
* if timeout is zero'd, we wait indefinitely.
*/
if ( timeout_copy.tv_sec == 0 && timeout_copy.tv_usec == 0 ) {
timeout = NULL;
} else {
timeout = &timeout_copy;
}
/*
* Wait for a result.
*/
rc = ldap_result( ld, msgid, 1, timeout, &result );
/*
* Interpret the result.
*/
if ( rc == 0 ) { /* timeout */
/*
* Timed out waiting for a reply from the server.
*/
rc = LDAP_TIMEOUT;
} else if ( rc < 0 ) {
/* Some other error occurred (no result received). */
char * matcheddnp2, * errmsgp2;
matcheddnp2=errmsgp2=NULL;
rc = slapi_ldap_get_lderrno( ld, &matcheddnp2, &errmsgp2 );
/* Need to allocate errmsgs */
if (matcheddnp2)
*matcheddnp=slapi_ch_strdup(matcheddnp2);
if (errmsgp2)
*errmsgp=slapi_ch_strdup(errmsgp2);
if ( LDAP_SUCCESS != rc ) {
static int warned_bind_once = 0;
if (!warned_bind_once) {
int hasmatched = (matcheddnp && *matcheddnp && (**matcheddnp != '\0'));
slapi_log_error(SLAPI_LOG_FATAL, CB_PLUGIN_SUBSYSTEM,
"cb_sasl_bind_once_s failed (%s%s%s)\n",
hasmatched ? *matcheddnp : "",
hasmatched ? ": " : "",
ldap_err2string(rc));
warned_bind_once = 1;
}
}
} else {
/* Got a result from remote server -- parse it.*/
char * matcheddnp2, * errmsgp2;
matcheddnp2=errmsgp2=NULL;
*resctrlsp=NULL;
rc = ldap_parse_result( ld, result, status, &matcheddnp2, &errmsgp2,
&referrals, resctrlsp, 1 );
if ( referrals != NULL ) {
*refurlsp = referrals2berval( referrals );
slapi_ldap_value_free( referrals );
}
/* realloc matcheddn & errmsg because the mem alloc model */
/* may differ from malloc */
if (matcheddnp2) {
*matcheddnp=slapi_ch_strdup(matcheddnp2);
ldap_memfree(matcheddnp2);
}
if (errmsgp2) {
*errmsgp=slapi_ch_strdup(errmsgp2);
ldap_memfree(errmsgp2);
}
}
release_and_return:
if ( ld != NULL ) {
cb_release_op_connection( pool, ld, CB_LDAP_CONN_ERROR( rc ));
}
return( rc );
}
int
chainingdb_bind( Slapi_PBlock *pb )
{
cb_backend_instance *cb;
Slapi_Backend *be;
struct berval *creds = NULL, **urls = NULL;
const char *dn = NULL;
Slapi_DN *sdn = NULL;
Slapi_DN *mysdn = NULL;
char *matcheddn = NULL, *errmsg = NULL;
LDAPControl **reqctrls = NULL, **resctrls = NULL, **ctrls = NULL;
char *mechanism = NULL;
int status=LDAP_SUCCESS;
int allocated_errmsg = 0;
int rc = LDAP_SUCCESS;
int freectrls = 1;
int bind_retry;
int method;
if ( LDAP_SUCCESS != (rc = cb_forward_operation(pb) )) {
cb_send_ldap_result( pb, rc, NULL, "Chaining forbidden", 0, NULL );
return SLAPI_BIND_FAIL;
}
/* don't add proxy auth control. use this call to check for supported */
/* controls only. */
if ( LDAP_SUCCESS != ( rc = cb_update_controls( pb, NULL, &ctrls, 0 )) ) {
cb_send_ldap_result( pb, rc, NULL, NULL, 0, NULL );
if (ctrls)
ldap_controls_free(ctrls);
return SLAPI_BIND_FAIL;
}
if (ctrls)
ldap_controls_free(ctrls);
slapi_pblock_get( pb, SLAPI_BACKEND, &be );
slapi_pblock_get( pb, SLAPI_BIND_TARGET_SDN, &sdn );
slapi_pblock_get( pb, SLAPI_BIND_METHOD, &method );
slapi_pblock_get( pb, SLAPI_BIND_SASLMECHANISM, &mechanism);
slapi_pblock_get( pb, SLAPI_BIND_CREDENTIALS, &creds );
slapi_pblock_get( pb, SLAPI_REQCONTROLS, &reqctrls );
cb = cb_get_instance(be);
if ( NULL == sdn ) {
sdn = mysdn = slapi_sdn_new_ndn_byval("");
}
dn = slapi_sdn_get_ndn(sdn);
/* always allow noauth simple binds */
if (( method == LDAP_AUTH_SIMPLE) && creds->bv_len == 0 ) {
slapi_sdn_free(&mysdn);
return( SLAPI_BIND_ANONYMOUS );
}
cb_update_monitor_info(pb,cb,SLAPI_OPERATION_BIND);
/* Check wether the chaining BE is available or not */
if ( cb_check_availability( cb, pb ) == FARMSERVER_UNAVAILABLE ){
slapi_sdn_free(&mysdn);
return -1;
}
slapi_rwlock_rdlock(cb->rwl_config_lock);
bind_retry=cb->bind_retry;
slapi_rwlock_unlock(cb->rwl_config_lock);
rc = cb_sasl_bind_s(pb, cb->bind_pool, bind_retry, dn, method,
mechanism, creds, reqctrls, &matcheddn, &errmsg,
&urls, &resctrls, &status);
if ( LDAP_SUCCESS == rc ) {
rc = status;
allocated_errmsg = 1;
} else if ( LDAP_USER_CANCELLED != rc ) {
slapi_ch_free_string(&errmsg);
errmsg = ldap_err2string( rc );
if (rc == LDAP_TIMEOUT) {
cb_ping_farm(cb,NULL,0);
}
rc = LDAP_OPERATIONS_ERROR;
} else {
allocated_errmsg = 1;
}
if ( rc != LDAP_USER_CANCELLED ) { /* not abandoned */
if ( resctrls != NULL ) {
slapi_pblock_set( pb, SLAPI_RESCONTROLS, resctrls );
freectrls = 0;
}
if ( rc != LDAP_SUCCESS ) {
cb_send_ldap_result( pb, rc, matcheddn, errmsg, 0, urls );
}
}
if ( urls != NULL ) {
cb_free_bervals( urls );
}
if ( freectrls && ( resctrls != NULL )) {
ldap_controls_free( resctrls );
}
slapi_ch_free_string(&matcheddn);
if ( allocated_errmsg ) {
slapi_ch_free_string(&errmsg);
}
slapi_sdn_free(&mysdn);
return ((rc == LDAP_SUCCESS ) ? SLAPI_BIND_SUCCESS : SLAPI_BIND_FAIL );
}
static void
cb_free_bervals( struct berval **bvs )
{
int i;
if ( bvs != NULL ) {
for ( i = 0; bvs[ i ] != NULL; ++i ) {
slapi_ch_free( (void **)&bvs[ i ] );
}
}
slapi_ch_free( (void **)&bvs );
}
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