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/* bind.c - bdb backend bind routine */
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2000-2021 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/string.h>
#include <ac/unistd.h>
#include "back-bdb.h"
int
bdb_bind( Operation *op, SlapReply *rs )
{
struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
Entry *e;
Attribute *a;
EntryInfo *ei;
AttributeDescription *password = slap_schema.si_ad_userPassword;
DB_TXN *rtxn;
DB_LOCK lock;
Debug( LDAP_DEBUG_ARGS,
"==> " LDAP_XSTRING(bdb_bind) ": dn: %s\n",
op->o_req_dn.bv_val, 0, 0);
/* allow noauth binds */
switch ( be_rootdn_bind( op, NULL ) ) {
case LDAP_SUCCESS:
/* frontend will send result */
return rs->sr_err = LDAP_SUCCESS;
default:
/* give the database a chance */
/* NOTE: this behavior departs from that of other backends,
* since the others, in case of password checking failure
* do not give the database a chance. If an entry with
* rootdn's name does not exist in the database the result
* will be the same. See ITS#4962 for discussion. */
break;
}
rs->sr_err = bdb_reader_get(op, bdb->bi_dbenv, &rtxn);
switch(rs->sr_err) {
case 0:
break;
default:
rs->sr_text = "internal error";
send_ldap_result( op, rs );
return rs->sr_err;
}
dn2entry_retry:
/* get entry with reader lock */
rs->sr_err = bdb_dn2entry( op, rtxn, &op->o_req_ndn, &ei, 1,
&lock );
switch(rs->sr_err) {
case DB_NOTFOUND:
case 0:
break;
case LDAP_BUSY:
send_ldap_error( op, rs, LDAP_BUSY, "ldap_server_busy" );
return LDAP_BUSY;
case DB_LOCK_DEADLOCK:
case DB_LOCK_NOTGRANTED:
goto dn2entry_retry;
default:
send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
return rs->sr_err;
}
e = ei->bei_e;
if ( rs->sr_err == DB_NOTFOUND ) {
if( e != NULL ) {
bdb_cache_return_entry_r( bdb, e, &lock );
e = NULL;
}
rs->sr_err = LDAP_INVALID_CREDENTIALS;
send_ldap_result( op, rs );
return rs->sr_err;
}
ber_dupbv( &op->oq_bind.rb_edn, &e->e_name );
/* check for deleted */
if ( is_entry_subentry( e ) ) {
/* entry is an subentry, don't allow bind */
Debug( LDAP_DEBUG_TRACE, "entry is subentry\n", 0,
0, 0 );
rs->sr_err = LDAP_INVALID_CREDENTIALS;
goto done;
}
if ( is_entry_alias( e ) ) {
/* entry is an alias, don't allow bind */
Debug( LDAP_DEBUG_TRACE, "entry is alias\n", 0, 0, 0 );
rs->sr_err = LDAP_INVALID_CREDENTIALS;
goto done;
}
if ( is_entry_referral( e ) ) {
Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
0, 0 );
rs->sr_err = LDAP_INVALID_CREDENTIALS;
goto done;
}
switch ( op->oq_bind.rb_method ) {
case LDAP_AUTH_SIMPLE:
a = attr_find( e->e_attrs, password );
if ( a == NULL ) {
rs->sr_err = LDAP_INVALID_CREDENTIALS;
goto done;
}
if ( slap_passwd_check( op, e, a, &op->oq_bind.rb_cred,
&rs->sr_text ) != 0 )
{
/* failure; stop front end from sending result */
rs->sr_err = LDAP_INVALID_CREDENTIALS;
goto done;
}
rs->sr_err = 0;
break;
default:
assert( 0 ); /* should not be reachable */
rs->sr_err = LDAP_STRONG_AUTH_NOT_SUPPORTED;
rs->sr_text = "authentication method not supported";
}
done:
/* free entry and reader lock */
if( e != NULL ) {
bdb_cache_return_entry_r( bdb, e, &lock );
}
if ( rs->sr_err ) {
send_ldap_result( op, rs );
if ( rs->sr_ref ) {
ber_bvarray_free( rs->sr_ref );
rs->sr_ref = NULL;
}
}
/* front end will send result on success (rs->sr_err==0) */
return rs->sr_err;
}
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